UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



FORM 6-K


REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE MONTH OF JUNE 2024


COMMISSION FILE NUMBER 001-38976

Genmab A/S
(Exact name of Registrant as specified in its charter)

Carl Jacobsens Vej 30

2500 Valby

Denmark

+45 70 20 27 28
(Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  Form 40-F 

This report on Form 6-K shall be deemed to be incorporated by reference in Genmab A/S’s registration statements on Form S-8 (File No. 333-232693, 333-253519, 333-262970 and 333-277273) and to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.


SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

nthony

GENMAB A/S

BY:

/s/ Anthony Pagano

Name: Anthony Pagano

Title: Executive Vice President & Chief Financial Officer

DATE: JUNE 27, 2024


EXHIBIT INDEX

O

Exhibit

Description of Exhibit

99.1

Company Announcement Dated June 27, 2024: Completion of Share Buy-back Program

99.1(a)

Appendix Share buyback program – Specification for June 24 – June 26, 2024


Exhibit 99.1

Graphic

Completion of Share Buy-back Program

Company Announcement

COPENHAGEN, Denmark; June 27, 2024 – Genmab A/S (Nasdaq: GMAB) announces that its share buy-back program has been completed on June 26, 2024.

On March 15, 2024, Genmab announced the initiation of a share buy-back program to repurchase up to DKK 3.5 billion worth of shares.

The share buy-back program was expected to be completed no later than December 16, 2024.

The following transactions were executed under the program from June 24, 2024, to June 26, 2024:

Trading Platform

No. of shares

Average price (DKK)

Total value (DKK)

Accumulated through

last announcement

1,658,875

 

3,206,050,227.60

June 24, 2024

XCSE

25,764

1,810.12

CEUX

18,839

1,810.32

AQEU

2,792

1,809.45

TQEX

2,691

1,809.26

Total

50,086

1,810.11

90,661,279.65

June 25, 2024

XCSE

36,270

1,800.35

CEUX

18,170

1,800.16

AQEU

3,251

1,800.03

TQEX

2,745

1,801.12

Total

60,436

1,800.31

108,803,643.94

June 26, 2024

XCSE

27,872

1,800.44

CEUX

18,717

1,801.83

AQEU

3,065

1,799.31

TQEX

2,802

1,806.23

Total

52,456

1,801.18

94,482,593.17

Total

162,978

293,947,516.76

Accumulated under the program

1,821,853

 

3,499,997,744.36

Details of each transaction are included as an appendix to this announcement.

Following these transactions, Genmab holds 2,670,991 shares as treasury shares, corresponding to 4.04% of the total share capital and voting rights.

The share buy-back program is undertaken in accordance with Regulation (EU) No. 596/2014 (‘MAR’) and the Commission Delegated Regulation (EU) 2016/1052, also referred to as the “Safe Harbour Regulation.” Further details on the terms of the share buy-back program can be found in our company announcement no. 22 dated March 15, 2024.

Genmab A/S

Tel: +45 7020 2728

Company Announcement no. 48

Carl Jacobsens Vej 30

Fax: +45 7020 2729

Page 1/2

2500 Valby, Denmark

www.genmab.com

CVR no. 2102 3884

LEI Code 529900MTJPDPE4MHJ122


Graphic

Completion of Share Buy-back Program

About Genmab 
Genmab is an international biotechnology company with a core purpose of guiding its unstoppable team to strive toward improving the lives of patients with innovative and differentiated antibody therapeutics. For 25 years, its passionate, innovative and collaborative team has invented next-generation antibody technology platforms and leveraged translational, quantitative and data sciences, resulting in a proprietary pipeline including bispecific T-cell engagers, antibody-drug conjugates, next-generation immune checkpoint modulators and effector function-enhanced antibodies. By 2030, Genmab’s vision is to transform the lives of people with cancer and other serious diseases with knock-your-socks-off (KYSO®) antibody medicines. 

 

Established in 1999, Genmab is headquartered in Copenhagen, Denmark, with international presence across North America, Europe and Asia Pacific. For more information, please visit Genmab.com and follow us on LinkedIn and X.

Contact:
Marisol Peron, Senior Vice President, Global Communications & Corporate Affairs

T: +1 609 524 0065; E: mmp@genmab.com

Andrew Carlsen, Vice President, Head of Investor Relations

T: +45 3377 9558; E: acn@genmab.com


This Company Announcement contains forward looking statements. The words “believe,” “expect,” “anticipate,” “intend” and “plan” and similar expressions identify forward looking statements. Actual results or performance may differ materially from any future results or performance expressed or implied by such statements. The important factors that could cause our actual results or performance to differ materially include, among others, risks associated with preclinical and clinical development of products, uncertainties related to the outcome and conduct of clinical trials including unforeseen safety issues, uncertainties related to product manufacturing, the lack of market acceptance of our products, our inability to manage growth, the competitive environment in relation to our business area and markets, our inability to attract and retain suitably qualified personnel, the unenforceability or lack of protection of our patents and proprietary rights, our relationships with affiliated entities, changes and developments in technology which may render our products or technologies obsolete, and other factors. For a further discussion of these risks, please refer to the risk management sections in Genmab’s most recent financial reports, which are available on www.genmab.com and the risk factors included in Genmab’s most recent Annual Report on Form 20-F and other filings with the U.S. Securities and Exchange Commission (SEC), which are available at www.sec.gov. Genmab does not undertake any obligation to update or revise forward looking statements in this Company Announcement nor to confirm such statements to reflect subsequent events or circumstances after the date made or in relation to actual results, unless required by law.


Genmab A/S and/or its subsidiaries own the following trademarks: Genmab®; the Y-shaped Genmab logo®; Genmab in combination with the Y-shaped Genmab logo®; HuMax®; DuoBody®; HexaBody®; DuoHexaBody®, HexElect® and KYSO®.

Genmab A/S

Tel: +45 7020 2728

Company Announcement no. 48

Carl Jacobsens Vej 30

Fax: +45 7020 2729

Page 2/2

2500 Valby, Denmark

www.genmab.com

CVR no. 2102 3884

LEI Code 529900MTJPDPE4MHJ122


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Issuer

Date

Time CEST

Price (DKK)

Quantity

Venue

Genmab A/S

24/06/2024

9:07:21 AM

1,804.0000

70

XCSE

Genmab A/S

24/06/2024

9:07:21 AM

1,804.0000

33

XCSE

Genmab A/S

24/06/2024

9:07:21 AM

1,804.0000

33

XCSE

Genmab A/S

24/06/2024

9:07:21 AM

1,804.0000

70

XCSE

Genmab A/S

24/06/2024

9:07:21 AM

1,804.0000

33

XCSE

Genmab A/S

24/06/2024

9:07:21 AM

1,804.0000

70

XCSE

Genmab A/S

24/06/2024

9:07:21 AM

1,804.0000

42

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

AQEU

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

AQEU

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

32

AQEU

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

2

AQEU

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

5

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

31

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

31

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

31

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

28

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

31

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

31

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

31

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

1

TQEX

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

10

XCSE

Genmab A/S

24/06/2024

9:09:56 AM

1,803.5000

9

XCSE

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

22

XCSE

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

96

XCSE

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

21

CEUX

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

21

CEUX

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

2

CEUX

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

3

AQEU

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

41

AQEU

Genmab A/S

24/06/2024

9:10:28 AM

1,802.0000

5

TQEX

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

9

XCSE

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

9

XCSE

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

61

XCSE

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

13

XCSE

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

5

TQEX

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

10

CEUX

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

2

TQEX

Genmab A/S

24/06/2024

9:13:29 AM

1,800.0000

17

XCSE

1


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:14:08 AM

1,798.5000

55

CEUX

Genmab A/S

24/06/2024

9:14:08 AM

1,798.5000

8

AQEU

Genmab A/S

24/06/2024

9:14:08 AM

1,798.5000

9

TQEX

Genmab A/S

24/06/2024

9:14:08 AM

1,798.5000

36

XCSE

Genmab A/S

24/06/2024

9:14:08 AM

1,798.5000

25

XCSE

Genmab A/S

24/06/2024

9:15:53 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:15:53 AM

1,802.0000

4

CEUX

Genmab A/S

24/06/2024

9:15:53 AM

1,802.0000

4

CEUX

Genmab A/S

24/06/2024

9:15:53 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:15:53 AM

1,802.0000

17

XCSE

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

5

XCSE

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

9

XCSE

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

14

XCSE

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

14

XCSE

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

14

XCSE

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

14

XCSE

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:16:12 AM

1,802.0000

13

CEUX

Genmab A/S

24/06/2024

9:17:13 AM

1,801.0000

22

XCSE

Genmab A/S

24/06/2024

9:17:13 AM

1,801.0000

56

XCSE

Genmab A/S

24/06/2024

9:17:13 AM

1,801.0000

70

CEUX

Genmab A/S

24/06/2024

9:20:00 AM

1,800.0000

38

CEUX

Genmab A/S

24/06/2024

9:20:00 AM

1,800.0000

6

AQEU

Genmab A/S

24/06/2024

9:20:00 AM

1,800.0000

6

TQEX

Genmab A/S

24/06/2024

9:20:00 AM

1,800.0000

13

CEUX

Genmab A/S

24/06/2024

9:20:00 AM

1,800.0000

6

TQEX

Genmab A/S

24/06/2024

9:20:00 AM

1,800.0000

43

XCSE

Genmab A/S

24/06/2024

9:20:00 AM

1,800.0000

12

XCSE

Genmab A/S

24/06/2024

9:21:00 AM

1,800.5000

21

XCSE

Genmab A/S

24/06/2024

9:21:00 AM

1,800.5000

20

XCSE

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

44

CEUX

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

44

CEUX

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

22

CEUX

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

7

AQEU

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

37

AQEU

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

22

CEUX

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

22

CEUX

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

37

CEUX

Genmab A/S

24/06/2024

9:21:53 AM

1,801.0000

22

CEUX

Genmab A/S

24/06/2024

9:21:54 AM

1,801.0000

44

AQEU

Genmab A/S

24/06/2024

9:21:54 AM

1,800.5000

9

XCSE

Genmab A/S

24/06/2024

9:21:54 AM

1,800.5000

24

XCSE

2


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:21:54 AM

1,800.5000

9

XCSE

Genmab A/S

24/06/2024

9:21:54 AM

1,800.5000

24

XCSE

Genmab A/S

24/06/2024

9:23:45 AM

1,800.0000

8

CEUX

Genmab A/S

24/06/2024

9:23:45 AM

1,800.0000

5

TQEX

Genmab A/S

24/06/2024

9:23:45 AM

1,800.0000

7

XCSE

Genmab A/S

24/06/2024

9:24:02 AM

1,799.0000

17

CEUX

Genmab A/S

24/06/2024

9:24:23 AM

1,799.5000

36

CEUX

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

28

XCSE

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

25

CEUX

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

25

CEUX

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

4

CEUX

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

4

AQEU

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

9

AQEU

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

28

XCSE

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

4

XCSE

Genmab A/S

24/06/2024

9:25:24 AM

1,802.0000

31

XCSE

Genmab A/S

24/06/2024

9:25:24 AM

1,801.5000

11

CEUX

Genmab A/S

24/06/2024

9:25:24 AM

1,801.5000

6

CEUX

Genmab A/S

24/06/2024

9:25:24 AM

1,801.5000

18

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,801.0000

49

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,801.0000

32

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,801.0000

10

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,801.0000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,801.0000

12

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,801.0000

89

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

21

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

19

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

20

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

8

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

19

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

8

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

3

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

1

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

1

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

3

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

3

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

2

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

3


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

23

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

1

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

18

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

18

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

5

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

13

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

6

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

8

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

4

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

7

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.0000

15

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.0000

4

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.0000

19

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

36

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.0000

5

TQEX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

12

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.0000

19

CEUX

Genmab A/S

24/06/2024

9:26:24 AM

1,800.0000

19

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.0000

1

AQEU

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

39

XCSE

Genmab A/S

24/06/2024

9:26:24 AM

1,800.5000

16

XCSE

Genmab A/S

24/06/2024

9:33:31 AM

1,803.5000

36

XCSE

Genmab A/S

24/06/2024

9:33:55 AM

1,803.5000

30

CEUX

Genmab A/S

24/06/2024

9:33:55 AM

1,803.5000

26

CEUX

Genmab A/S

24/06/2024

9:33:55 AM

1,803.5000

34

CEUX

Genmab A/S

24/06/2024

9:33:55 AM

1,803.5000

30

CEUX

Genmab A/S

24/06/2024

9:33:55 AM

1,803.5000

34

XCSE

Genmab A/S

24/06/2024

9:33:55 AM

1,803.5000

62

XCSE

Genmab A/S

24/06/2024

9:33:55 AM

1,803.5000

39

XCSE

Genmab A/S

24/06/2024

9:35:02 AM

1,805.0000

15

CEUX

Genmab A/S

24/06/2024

9:35:02 AM

1,805.0000

15

XCSE

Genmab A/S

24/06/2024

9:35:02 AM

1,805.0000

73

XCSE

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

14

CEUX

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

14

XCSE

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

14

XCSE

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

8

XCSE

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

14

CEUX

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

14

CEUX

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

14

XCSE

4


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:35:07 AM

1,805.0000

14

CEUX

Genmab A/S

24/06/2024

9:35:08 AM

1,805.0000

14

XCSE

Genmab A/S

24/06/2024

9:36:53 AM

1,804.5000

2

XCSE

Genmab A/S

24/06/2024

9:38:03 AM

1,807.5000

70

XCSE

Genmab A/S

24/06/2024

9:38:11 AM

1,807.0000

11

CEUX

Genmab A/S

24/06/2024

9:38:11 AM

1,807.0000

11

CEUX

Genmab A/S

24/06/2024

9:38:11 AM

1,807.0000

5

TQEX

Genmab A/S

24/06/2024

9:38:11 AM

1,807.0000

5

TQEX

Genmab A/S

24/06/2024

9:38:11 AM

1,807.0000

11

XCSE

Genmab A/S

24/06/2024

9:38:11 AM

1,807.0000

11

XCSE

Genmab A/S

24/06/2024

9:38:11 AM

1,807.0000

6

XCSE

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

5

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

14

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

11

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

16

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

19

XCSE

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

11

XCSE

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

19

XCSE

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

11

XCSE

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

19

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

11

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:08 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:09 AM

1,808.5000

5

CEUX

Genmab A/S

24/06/2024

9:40:09 AM

1,808.5000

5

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

6

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

11

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

8

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

35

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

11

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

20

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

11

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

1

XCSE

5


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

8

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

11

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

6

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

6

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

3

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

27

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

4

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

1

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

9

CEUX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

8

XCSE

Genmab A/S

24/06/2024

9:40:10 AM

1,808.5000

1

CEUX

Genmab A/S

24/06/2024

9:42:15 AM

1,807.5000

10

XCSE

Genmab A/S

24/06/2024

9:43:38 AM

1,808.0000

12

XCSE

Genmab A/S

24/06/2024

9:43:38 AM

1,808.0000

14

CEUX

Genmab A/S

24/06/2024

9:43:38 AM

1,808.0000

7

CEUX

Genmab A/S

24/06/2024

9:43:42 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:43:42 AM

1,808.0000

16

XCSE

Genmab A/S

24/06/2024

9:44:06 AM

1,808.5000

1

TQEX

Genmab A/S

24/06/2024

9:44:06 AM

1,808.5000

9

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

16

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

7

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

6


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

3

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

8

XCSE

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

7

CEUX

Genmab A/S

24/06/2024

9:44:21 AM

1,808.0000

23

TQEX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

XCSE

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

2

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

7

CEUX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

5

TQEX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

8

TQEX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

5

TQEX

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

CEUX

7


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:46:46 AM

1,807.0000

9

XCSE

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

22

XCSE

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

38

XCSE

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

50

XCSE

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

8

AQEU

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

8

TQEX

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

25

TQEX

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

55

CEUX

Genmab A/S

24/06/2024

9:47:12 AM

1,807.0000

5

CEUX

Genmab A/S

24/06/2024

9:47:13 AM

1,807.0000

39

CEUX

Genmab A/S

24/06/2024

9:47:13 AM

1,807.0000

50

XCSE

Genmab A/S

24/06/2024

9:47:13 AM

1,807.0000

11

CEUX

Genmab A/S

24/06/2024

9:47:13 AM

1,807.0000

8

TQEX

Genmab A/S

24/06/2024

9:48:53 AM

1,806.0000

18

CEUX

Genmab A/S

24/06/2024

9:48:53 AM

1,806.0000

46

CEUX

Genmab A/S

24/06/2024

9:49:55 AM

1,806.0000

7

XCSE

Genmab A/S

24/06/2024

9:49:55 AM

1,806.0000

20

XCSE

Genmab A/S

24/06/2024

9:49:55 AM

1,806.0000

26

CEUX

Genmab A/S

24/06/2024

9:49:55 AM

1,806.0000

4

AQEU

Genmab A/S

24/06/2024

9:49:55 AM

1,806.0000

4

AQEU

Genmab A/S

24/06/2024

9:49:55 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

9:49:55 AM

1,806.0000

23

XCSE

Genmab A/S

24/06/2024

9:49:56 AM

1,806.0000

41

XCSE

Genmab A/S

24/06/2024

9:49:56 AM

1,806.0000

21

XCSE

Genmab A/S

24/06/2024

9:49:56 AM

1,806.0000

21

XCSE

Genmab A/S

24/06/2024

9:53:23 AM

1,807.7500

34

CEUX

Genmab A/S

24/06/2024

9:53:23 AM

1,808.0000

5

XCSE

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

65

XCSE

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

58

CEUX

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

58

CEUX

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

10

CEUX

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

20

CEUX

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

9

AQEU

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

9

AQEU

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

9

AQEU

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

7

AQEU

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

2

AQEU

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

2

AQEU

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

6

AQEU

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

9

TQEX

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

9

TQEX

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

9

TQEX

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

65

XCSE

Genmab A/S

24/06/2024

9:53:27 AM

1,807.5000

30

XCSE

Genmab A/S

24/06/2024

9:53:28 AM

1,807.5000

19

CEUX

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

31

CEUX

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

14

CEUX

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

20

CEUX

8


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

7

AQEU

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

7

AQEU

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

7

TQEX

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

7

TQEX

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

10

TQEX

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

30

XCSE

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

21

XCSE

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

18

XCSE

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

15

CEUX

Genmab A/S

24/06/2024

9:54:59 AM

1,806.5000

36

XCSE

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

10

XCSE

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

6

XCSE

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

44

XCSE

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

10

CEUX

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

10

CEUX

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

5

TQEX

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

5

TQEX

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

10

XCSE

Genmab A/S

24/06/2024

9:57:19 AM

1,806.5000

34

XCSE

Genmab A/S

24/06/2024

9:57:44 AM

1,805.5000

20

XCSE

Genmab A/S

24/06/2024

9:57:44 AM

1,805.5000

142

XCSE

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

22

XCSE

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

22

XCSE

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

21

CEUX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

21

CEUX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

7

CEUX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

3

AQEU

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

21

CEUX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

15

CEUX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

3

AQEU

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

22

XCSE

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

22

XCSE

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

XCSE

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

20

CEUX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

9:58:54 AM

1,805.0000

19

CEUX

Genmab A/S

24/06/2024

10:02:10 AM

1,806.5000

1

AQEU

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

58

XCSE

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

113

XCSE

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

10

CEUX

9


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

43

CEUX

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

8

TQEX

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

8

TQEX

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

30

TQEX

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

28

XCSE

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

28

XCSE

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

26

XCSE

Genmab A/S

24/06/2024

10:04:29 AM

1,807.0000

28

XCSE

Genmab A/S

24/06/2024

10:07:12 AM

1,806.5000

75

XCSE

Genmab A/S

24/06/2024

10:07:12 AM

1,806.5000

13

XCSE

Genmab A/S

24/06/2024

10:07:12 AM

1,806.5000

79

CEUX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.5000

11

AQEU

Genmab A/S

24/06/2024

10:07:12 AM

1,806.5000

5

TQEX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.5000

8

TQEX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.0000

21

CEUX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.0000

23

XCSE

Genmab A/S

24/06/2024

10:07:12 AM

1,806.0000

21

CEUX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.0000

21

CEUX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.0000

21

CEUX

Genmab A/S

24/06/2024

10:07:12 AM

1,806.0000

4

TQEX

Genmab A/S

24/06/2024

10:12:37 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:12:37 AM

1,806.0000

9

TQEX

Genmab A/S

24/06/2024

10:12:57 AM

1,806.0000

8

AQEU

Genmab A/S

24/06/2024

10:12:57 AM

1,806.0000

11

AQEU

Genmab A/S

24/06/2024

10:12:57 AM

1,806.0000

2

AQEU

Genmab A/S

24/06/2024

10:12:57 AM

1,806.0000

7

TQEX

Genmab A/S

24/06/2024

10:12:57 AM

1,806.0000

9

TQEX

Genmab A/S

24/06/2024

10:12:57 AM

1,806.0000

2

TQEX

Genmab A/S

24/06/2024

10:13:12 AM

1,806.0000

3

TQEX

Genmab A/S

24/06/2024

10:13:24 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:13:24 AM

1,806.0000

3

TQEX

Genmab A/S

24/06/2024

10:13:24 AM

1,806.0000

1

TQEX

Genmab A/S

24/06/2024

10:15:07 AM

1,806.0000

4

TQEX

Genmab A/S

24/06/2024

10:15:08 AM

1,805.5000

204

CEUX

Genmab A/S

24/06/2024

10:15:56 AM

1,806.0000

6

TQEX

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

10

CEUX

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

8

CEUX

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

10

CEUX

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

1

CEUX

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

10

XCSE

Genmab A/S

24/06/2024

10:16:42 AM

1,806.0000

7

XCSE

Genmab A/S

24/06/2024

10:16:45 AM

1,805.7500

70

CEUX

Genmab A/S

24/06/2024

10:16:45 AM

1,805.5000

310

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

27

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

27

CEUX

10


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

27

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

25

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

2

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

27

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

25

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

2

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

2

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

4

AQEU

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

20

AQEU

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

2

AQEU

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

2

AQEU

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

9

AQEU

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

2

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

2

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

4

AQEU

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

4

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

4

CEUX

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

30

XCSE

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

30

XCSE

Genmab A/S

24/06/2024

10:18:53 AM

1,806.0000

28

XCSE

Genmab A/S

24/06/2024

10:19:00 AM

1,806.0000

30

XCSE

Genmab A/S

24/06/2024

10:19:00 AM

1,806.0000

36

XCSE

Genmab A/S

24/06/2024

10:19:00 AM

1,806.0000

57

XCSE

Genmab A/S

24/06/2024

10:24:39 AM

1,804.0000

21

CEUX

Genmab A/S

24/06/2024

10:24:39 AM

1,804.0000

6

AQEU

Genmab A/S

24/06/2024

10:24:41 AM

1,804.0000

5

CEUX

Genmab A/S

24/06/2024

10:25:16 AM

1,804.5000

7

TQEX

Genmab A/S

24/06/2024

10:25:16 AM

1,804.5000

3

XCSE

Genmab A/S

24/06/2024

10:25:16 AM

1,804.5000

4

XCSE

Genmab A/S

24/06/2024

10:25:16 AM

1,804.5000

2

XCSE

Genmab A/S

24/06/2024

10:25:27 AM

1,804.2500

35

CEUX

Genmab A/S

24/06/2024

10:25:48 AM

1,804.5000

10

TQEX

Genmab A/S

24/06/2024

10:25:48 AM

1,804.5000

14

XCSE

Genmab A/S

24/06/2024

10:26:32 AM

1,804.5000

4

XCSE

Genmab A/S

24/06/2024

10:26:43 AM

1,804.5000

5

TQEX

Genmab A/S

24/06/2024

10:26:43 AM

1,804.5000

4

XCSE

Genmab A/S

24/06/2024

10:26:43 AM

1,804.5000

9

XCSE

Genmab A/S

24/06/2024

10:26:57 AM

1,804.5000

7

XCSE

Genmab A/S

24/06/2024

10:26:57 AM

1,804.5000

28

XCSE

Genmab A/S

24/06/2024

10:27:05 AM

1,804.0000

15

CEUX

Genmab A/S

24/06/2024

10:27:05 AM

1,804.0000

46

XCSE

Genmab A/S

24/06/2024

10:27:05 AM

1,804.0000

7

TQEX

Genmab A/S

24/06/2024

10:27:05 AM

1,804.0000

46

XCSE

Genmab A/S

24/06/2024

10:28:06 AM

1,803.7500

40

CEUX

Genmab A/S

24/06/2024

10:28:37 AM

1,804.0000

13

AQEU

11


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

10:28:37 AM

1,804.0000

1

TQEX

Genmab A/S

24/06/2024

10:28:37 AM

1,804.0000

24

XCSE

Genmab A/S

24/06/2024

10:28:48 AM

1,804.0000

18

XCSE

Genmab A/S

24/06/2024

10:28:48 AM

1,804.0000

22

XCSE

Genmab A/S

24/06/2024

10:29:16 AM

1,804.0000

27

CEUX

Genmab A/S

24/06/2024

10:29:16 AM

1,804.0000

11

CEUX

Genmab A/S

24/06/2024

10:29:41 AM

1,804.0000

39

CEUX

Genmab A/S

24/06/2024

10:30:31 AM

1,804.2500

76

CEUX

Genmab A/S

24/06/2024

10:31:22 AM

1,804.0000

39

CEUX

Genmab A/S

24/06/2024

10:31:22 AM

1,804.0000

40

CEUX

Genmab A/S

24/06/2024

10:31:22 AM

1,804.0000

30

CEUX

Genmab A/S

24/06/2024

10:31:22 AM

1,804.0000

39

CEUX

Genmab A/S

24/06/2024

10:31:22 AM

1,804.0000

1

CEUX

Genmab A/S

24/06/2024

10:31:22 AM

1,804.0000

44

XCSE

Genmab A/S

24/06/2024

10:31:22 AM

1,804.0000

41

XCSE

Genmab A/S

24/06/2024

10:31:23 AM

1,804.0000

39

CEUX

Genmab A/S

24/06/2024

10:31:23 AM

1,804.0000

11

CEUX

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

15

CEUX

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

24

CEUX

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

24

CEUX

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

3

AQEU

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

2

AQEU

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

1

AQEU

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

10

AQEU

Genmab A/S

24/06/2024

10:31:25 AM

1,804.0000

6

TQEX

Genmab A/S

24/06/2024

10:32:05 AM

1,803.5000

98

CEUX

Genmab A/S

24/06/2024

10:32:05 AM

1,803.5000

14

AQEU

Genmab A/S

24/06/2024

10:32:05 AM

1,803.5000

15

TQEX

Genmab A/S

24/06/2024

10:32:05 AM

1,803.5000

109

XCSE

Genmab A/S

24/06/2024

10:32:05 AM

1,803.0000

20

CEUX

Genmab A/S

24/06/2024

10:32:05 AM

1,803.0000

16

CEUX

Genmab A/S

24/06/2024

10:32:05 AM

1,803.0000

39

TQEX

Genmab A/S

24/06/2024

10:32:05 AM

1,803.0000

43

XCSE

Genmab A/S

24/06/2024

10:32:05 AM

1,803.0000

121

XCSE

Genmab A/S

24/06/2024

10:40:21 AM

1,802.5000

39

TQEX

Genmab A/S

24/06/2024

10:42:00 AM

1,802.5000

10

XCSE

Genmab A/S

24/06/2024

10:43:10 AM

1,803.5000

8

CEUX

Genmab A/S

24/06/2024

10:43:10 AM

1,803.5000

9

CEUX

Genmab A/S

24/06/2024

10:43:10 AM

1,803.5000

73

CEUX

Genmab A/S

24/06/2024

10:43:10 AM

1,803.5000

5

CEUX

Genmab A/S

24/06/2024

10:43:10 AM

1,803.5000

5

CEUX

Genmab A/S

24/06/2024

10:43:26 AM

1,803.5000

23

TQEX

Genmab A/S

24/06/2024

10:43:26 AM

1,803.5000

39

XCSE

Genmab A/S

24/06/2024

10:43:26 AM

1,803.5000

11

XCSE

Genmab A/S

24/06/2024

10:43:26 AM

1,803.5000

30

XCSE

Genmab A/S

24/06/2024

10:43:26 AM

1,803.5000

11

XCSE

Genmab A/S

24/06/2024

10:43:26 AM

1,803.5000

15

CEUX

Genmab A/S

24/06/2024

10:43:26 AM

1,803.5000

10

TQEX

12


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

10:43:48 AM

1,804.0000

12

AQEU

Genmab A/S

24/06/2024

10:44:24 AM

1,804.0000

45

TQEX

Genmab A/S

24/06/2024

10:44:24 AM

1,804.0000

7

TQEX

Genmab A/S

24/06/2024

10:44:53 AM

1,805.0000

5

AQEU

Genmab A/S

24/06/2024

10:44:53 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

10:45:16 AM

1,805.0000

66

CEUX

Genmab A/S

24/06/2024

10:45:17 AM

1,805.0000

13

XCSE

Genmab A/S

24/06/2024

10:47:28 AM

1,806.5000

4

CEUX

Genmab A/S

24/06/2024

10:48:31 AM

1,807.0000

1

CEUX

Genmab A/S

24/06/2024

10:48:58 AM

1,807.5000

41

CEUX

Genmab A/S

24/06/2024

10:48:58 AM

1,807.5000

30

XCSE

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

22

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

20

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

2

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

20

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

4

AQEU

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

4

AQEU

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

36

AQEU

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

22

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

22

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

16

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

24

XCSE

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

24

XCSE

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

87

XCSE

Genmab A/S

24/06/2024

10:49:24 AM

1,807.0000

1

XCSE

Genmab A/S

24/06/2024

10:49:24 AM

1,806.5000

20

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,806.5000

20

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,806.5000

7

CEUX

Genmab A/S

24/06/2024

10:49:24 AM

1,806.5000

3

TQEX

Genmab A/S

24/06/2024

10:49:24 AM

1,806.5000

2

TQEX

Genmab A/S

24/06/2024

10:49:24 AM

1,806.5000

2

TQEX

Genmab A/S

24/06/2024

10:50:24 AM

1,807.5000

40

CEUX

Genmab A/S

24/06/2024

10:50:55 AM

1,808.0000

30

XCSE

Genmab A/S

24/06/2024

10:51:21 AM

1,808.5000

5

AQEU

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

27

CEUX

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

4

AQEU

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

5

TQEX

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

15

TQEX

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

31

XCSE

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

23

XCSE

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

8

XCSE

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

11

XCSE

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

27

CEUX

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

9

CEUX

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

4

AQEU

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

3

AQEU

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

5

TQEX

13


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

10:51:40 AM

1,808.0000

15

TQEX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

20

CEUX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

20

CEUX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

16

CEUX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

5

TQEX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

5

TQEX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

5

TQEX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

4

TQEX

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

21

XCSE

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

20

XCSE

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

21

XCSE

Genmab A/S

24/06/2024

10:51:51 AM

1,807.5000

20

XCSE

Genmab A/S

24/06/2024

10:53:47 AM

1,807.0000

66

CEUX

Genmab A/S

24/06/2024

10:53:47 AM

1,807.0000

18

CEUX

Genmab A/S

24/06/2024

10:54:31 AM

1,807.0000

2

AQEU

Genmab A/S

24/06/2024

10:54:54 AM

1,812.0000

39

CEUX

Genmab A/S

24/06/2024

10:54:54 AM

1,812.0000

6

TQEX

Genmab A/S

24/06/2024

10:54:54 AM

1,812.0000

44

XCSE

Genmab A/S

24/06/2024

10:54:54 AM

1,812.0000

6

CEUX

Genmab A/S

24/06/2024

10:57:08 AM

1,810.0000

50

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,810.0000

2

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,810.0000

52

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,810.5000

48

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,810.5000

75

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,810.5000

43

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

25

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

25

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

5

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

20

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

25

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

20

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

25

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,811.0000

12

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,810.0000

52

XCSE

Genmab A/S

24/06/2024

10:57:08 AM

1,810.0000

8

XCSE

Genmab A/S

24/06/2024

11:01:13 AM

1,808.5000

50

CEUX

Genmab A/S

24/06/2024

11:01:13 AM

1,808.5000

19

CEUX

Genmab A/S

24/06/2024

11:01:13 AM

1,808.5000

10

AQEU

Genmab A/S

24/06/2024

11:01:13 AM

1,808.5000

11

TQEX

Genmab A/S

24/06/2024

11:01:13 AM

1,808.5000

77

XCSE

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

31

CEUX

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

13

CEUX

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

AQEU

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

AQEU

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

AQEU

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

AQEU

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

AQEU

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

AQEU

14


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

TQEX

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

5

TQEX

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

34

XCSE

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

12

XCSE

Genmab A/S

24/06/2024

11:03:18 AM

1,807.5000

50

AQEU

Genmab A/S

24/06/2024

11:03:18 AM

1,807.0000

51

XCSE

Genmab A/S

24/06/2024

11:03:18 AM

1,807.0000

1

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

65

CEUX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

10

AQEU

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

10

TQEX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

45

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

15

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

57

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

45

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.5000

21

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

2

CEUX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

11

CEUX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

8

CEUX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

13

CEUX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

21

CEUX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

50

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

51

XCSE

Genmab A/S

24/06/2024

11:07:59 AM

1,805.0000

21

XCSE

Genmab A/S

24/06/2024

11:08:01 AM

1,805.0000

21

CEUX

Genmab A/S

24/06/2024

11:08:01 AM

1,805.0000

21

CEUX

Genmab A/S

24/06/2024

11:08:01 AM

1,805.0000

2

AQEU

Genmab A/S

24/06/2024

11:08:01 AM

1,805.0000

4

TQEX

Genmab A/S

24/06/2024

11:12:48 AM

1,806.0000

1

XCSE

Genmab A/S

24/06/2024

11:14:05 AM

1,806.5000

39

CEUX

Genmab A/S

24/06/2024

11:14:18 AM

1,806.5000

33

CEUX

Genmab A/S

24/06/2024

11:16:54 AM

1,806.0000

6

TQEX

Genmab A/S

24/06/2024

11:16:54 AM

1,806.0000

38

CEUX

Genmab A/S

24/06/2024

11:16:54 AM

1,806.0000

38

CEUX

Genmab A/S

24/06/2024

11:16:54 AM

1,806.0000

6

TQEX

Genmab A/S

24/06/2024

11:16:54 AM

1,806.0000

42

XCSE

Genmab A/S

24/06/2024

11:17:15 AM

1,806.5000

9

CEUX

Genmab A/S

24/06/2024

11:17:15 AM

1,806.5000

181

CEUX

Genmab A/S

24/06/2024

11:17:27 AM

1,807.0000

14

AQEU

Genmab A/S

24/06/2024

11:17:27 AM

1,807.0000

20

AQEU

Genmab A/S

24/06/2024

11:17:41 AM

1,807.0000

5

AQEU

Genmab A/S

24/06/2024

11:17:41 AM

1,807.0000

2

AQEU

Genmab A/S

24/06/2024

11:18:33 AM

1,806.5000

733

CEUX

15


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

11:18:33 AM

1,806.5000

58

CEUX

Genmab A/S

24/06/2024

11:18:33 AM

1,806.5000

44

CEUX

Genmab A/S

24/06/2024

11:18:42 AM

1,806.0000

71

CEUX

Genmab A/S

24/06/2024

11:18:42 AM

1,806.0000

50

XCSE

Genmab A/S

24/06/2024

11:18:42 AM

1,806.0000

30

XCSE

Genmab A/S

24/06/2024

11:18:42 AM

1,806.0000

30

XCSE

Genmab A/S

24/06/2024

11:18:42 AM

1,806.0000

57

XCSE

Genmab A/S

24/06/2024

11:20:20 AM

1,804.5000

19

CEUX

Genmab A/S

24/06/2024

11:20:20 AM

1,804.5000

2

AQEU

Genmab A/S

24/06/2024

11:20:20 AM

1,804.5000

19

XCSE

Genmab A/S

24/06/2024

11:25:11 AM

1,803.0000

3

XCSE

Genmab A/S

24/06/2024

11:27:01 AM

1,803.0000

2

XCSE

Genmab A/S

24/06/2024

11:27:45 AM

1,804.0000

8

AQEU

Genmab A/S

24/06/2024

11:27:45 AM

1,804.0000

12

AQEU

Genmab A/S

24/06/2024

11:27:45 AM

1,804.0000

15

AQEU

Genmab A/S

24/06/2024

11:27:56 AM

1,803.7500

33

CEUX

Genmab A/S

24/06/2024

11:27:56 AM

1,804.0000

1

XCSE

Genmab A/S

24/06/2024

11:28:18 AM

1,804.0000

1

TQEX

Genmab A/S

24/06/2024

11:28:18 AM

1,804.0000

3

XCSE

Genmab A/S

24/06/2024

11:28:32 AM

1,804.0000

261

CEUX

Genmab A/S

24/06/2024

11:28:33 AM

1,804.0000

75

CEUX

Genmab A/S

24/06/2024

11:28:33 AM

1,804.0000

10

CEUX

Genmab A/S

24/06/2024

11:29:15 AM

1,804.0000

84

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

20

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.5000

71

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.5000

50

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.5000

33

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.5000

13

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.5000

24

AQEU

Genmab A/S

24/06/2024

11:32:04 AM

1,806.5000

25

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.5000

186

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

21

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

19

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

21

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

19

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

17

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

16

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

18

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

2

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

18

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

18

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

2

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

13

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

14

CEUX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

2

AQEU

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

2

AQEU

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

2

AQEU

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

16


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

3

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

3

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

28

AQEU

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

5

TQEX

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

27

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

3

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

15

XCSE

Genmab A/S

24/06/2024

11:32:04 AM

1,806.0000

33

XCSE

Genmab A/S

24/06/2024

11:39:32 AM

1,805.0000

1

TQEX

Genmab A/S

24/06/2024

11:39:32 AM

1,805.0000

5

XCSE

Genmab A/S

24/06/2024

11:39:43 AM

1,805.0000

30

XCSE

Genmab A/S

24/06/2024

11:39:43 AM

1,805.0000

3

XCSE

Genmab A/S

24/06/2024

11:39:54 AM

1,805.0000

5

XCSE

Genmab A/S

24/06/2024

11:40:34 AM

1,805.0000

6

AQEU

Genmab A/S

24/06/2024

11:40:34 AM

1,805.0000

34

XCSE

Genmab A/S

24/06/2024

11:40:34 AM

1,805.0000

30

XCSE

Genmab A/S

24/06/2024

11:40:34 AM

1,805.0000

10

XCSE

Genmab A/S

24/06/2024

11:40:52 AM

1,805.0000

1

XCSE

Genmab A/S

24/06/2024

11:41:16 AM

1,805.0000

3

XCSE

Genmab A/S

24/06/2024

11:42:19 AM

1,804.5000

100

XCSE

Genmab A/S

24/06/2024

11:44:26 AM

1,804.7500

192

CEUX

Genmab A/S

24/06/2024

11:44:26 AM

1,805.0000

6

AQEU

Genmab A/S

24/06/2024

11:44:26 AM

1,805.0000

1

TQEX

Genmab A/S

24/06/2024

11:44:26 AM

1,805.0000

7

XCSE

Genmab A/S

24/06/2024

11:44:26 AM

1,805.0000

30

XCSE

Genmab A/S

24/06/2024

11:44:26 AM

1,805.0000

40

CEUX

Genmab A/S

24/06/2024

11:44:26 AM

1,805.0000

34

CEUX

Genmab A/S

24/06/2024

11:44:26 AM

1,805.0000

10

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

97

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

75

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

3

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

CEUX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

5

CEUX

17


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

14

AQEU

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

1

AQEU

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

11

AQEU

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

1

AQEU

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

25

AQEU

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

5

TQEX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

36

TQEX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

15

TQEX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

5

TQEX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

11

TQEX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

8

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

7

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

83

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

7

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

11

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

7

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

36

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.5000

17

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.0000

1

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.0000

17

XCSE

Genmab A/S

24/06/2024

11:44:40 AM

1,804.0000

2

AQEU

Genmab A/S

24/06/2024

11:46:02 AM

1,804.0000

70

CEUX

Genmab A/S

24/06/2024

11:47:10 AM

1,804.0000

64

CEUX

Genmab A/S

24/06/2024

11:47:10 AM

1,804.0000

4

TQEX

Genmab A/S

24/06/2024

11:47:10 AM

1,804.0000

6

TQEX

Genmab A/S

24/06/2024

11:47:10 AM

1,804.0000

70

XCSE

Genmab A/S

24/06/2024

11:47:10 AM

1,804.0000

9

CEUX

Genmab A/S

24/06/2024

11:47:10 AM

1,803.5000

13

CEUX

Genmab A/S

24/06/2024

11:47:11 AM

1,803.5000

7

CEUX

Genmab A/S

24/06/2024

11:49:47 AM

1,805.0000

14

CEUX

Genmab A/S

24/06/2024

11:49:47 AM

1,805.0000

18

CEUX

Genmab A/S

24/06/2024

11:49:47 AM

1,805.0000

16

CEUX

Genmab A/S

24/06/2024

11:49:47 AM

1,805.0000

5

CEUX

Genmab A/S

24/06/2024

11:49:47 AM

1,805.0000

31

XCSE

Genmab A/S

24/06/2024

11:49:47 AM

1,805.0000

1

XCSE

Genmab A/S

24/06/2024

11:52:06 AM

1,804.5000

50

CEUX

Genmab A/S

24/06/2024

11:52:06 AM

1,804.5000

12

CEUX

Genmab A/S

24/06/2024

11:52:06 AM

1,804.5000

24

CEUX

Genmab A/S

24/06/2024

11:52:06 AM

1,804.5000

14

TQEX

Genmab A/S

24/06/2024

11:52:06 AM

1,804.5000

95

XCSE

Genmab A/S

24/06/2024

11:52:06 AM

1,804.5000

12

CEUX

Genmab A/S

24/06/2024

11:52:06 AM

1,804.0000

22

CEUX

Genmab A/S

24/06/2024

11:52:06 AM

1,804.0000

3

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

16

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

22

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

23

XCSE

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

20

XCSE

18


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

19

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

8

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

11

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

30

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

4

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

1

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

5

TQEX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

23

XCSE

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

20

XCSE

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

46

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

31

CEUX

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

30

XCSE

Genmab A/S

24/06/2024

11:52:08 AM

1,804.0000

26

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

13

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

29

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

45

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

74

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

50

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

45

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

29

XCSE

Genmab A/S

24/06/2024

11:54:39 AM

1,802.0000

33

XCSE

Genmab A/S

24/06/2024

12:03:19 PM

1,805.0000

385

CEUX

Genmab A/S

24/06/2024

12:04:47 PM

1,803.5000

20

XCSE

Genmab A/S

24/06/2024

12:07:10 PM

1,805.0000

282

CEUX

Genmab A/S

24/06/2024

12:10:15 PM

1,805.0000

69

CEUX

Genmab A/S

24/06/2024

12:10:31 PM

1,805.0000

38

CEUX

Genmab A/S

24/06/2024

12:10:31 PM

1,805.0000

38

CEUX

Genmab A/S

24/06/2024

12:10:31 PM

1,805.0000

1

CEUX

Genmab A/S

24/06/2024

12:12:54 PM

1,804.5000

62

XCSE

Genmab A/S

24/06/2024

12:15:20 PM

1,805.0000

56

CEUX

Genmab A/S

24/06/2024

12:16:26 PM

1,806.0000

23

XCSE

Genmab A/S

24/06/2024

12:17:42 PM

1,806.0000

52

CEUX

Genmab A/S

24/06/2024

12:17:42 PM

1,806.0000

40

CEUX

Genmab A/S

24/06/2024

12:17:42 PM

1,806.0000

23

XCSE

Genmab A/S

24/06/2024

12:17:42 PM

1,806.0000

23

XCSE

Genmab A/S

24/06/2024

12:17:42 PM

1,806.0000

35

XCSE

Genmab A/S

24/06/2024

12:17:42 PM

1,806.0000

8

TQEX

Genmab A/S

24/06/2024

12:17:42 PM

1,806.0000

8

CEUX

Genmab A/S

24/06/2024

12:19:00 PM

1,810.5000

26

XCSE

Genmab A/S

24/06/2024

12:19:00 PM

1,810.5000

26

XCSE

Genmab A/S

24/06/2024

12:19:00 PM

1,810.5000

30

XCSE

Genmab A/S

24/06/2024

12:19:00 PM

1,810.5000

16

XCSE

19


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

12:20:20 PM

1,809.5000

41

XCSE

Genmab A/S

24/06/2024

12:20:20 PM

1,809.5000

62

XCSE

Genmab A/S

24/06/2024

12:20:20 PM

1,809.5000

3

XCSE

Genmab A/S

24/06/2024

12:20:21 PM

1,809.0000

44

XCSE

Genmab A/S

24/06/2024

12:20:21 PM

1,809.0000

44

XCSE

Genmab A/S

24/06/2024

12:20:21 PM

1,809.0000

15

XCSE

Genmab A/S

24/06/2024

12:27:50 PM

1,806.0000

3

TQEX

Genmab A/S

24/06/2024

12:27:50 PM

1,806.0000

10

TQEX

Genmab A/S

24/06/2024

12:27:50 PM

1,806.0000

24

TQEX

Genmab A/S

24/06/2024

12:28:21 PM

1,805.0000

79

CEUX

Genmab A/S

24/06/2024

12:28:21 PM

1,805.0000

76

TQEX

Genmab A/S

24/06/2024

12:28:21 PM

1,805.0000

80

XCSE

Genmab A/S

24/06/2024

12:28:21 PM

1,804.5000

38

XCSE

Genmab A/S

24/06/2024

12:28:21 PM

1,804.5000

11

XCSE

Genmab A/S

24/06/2024

12:28:21 PM

1,804.5000

10

XCSE

Genmab A/S

24/06/2024

12:32:26 PM

1,804.0000

27

XCSE

Genmab A/S

24/06/2024

12:32:38 PM

1,803.5000

81

CEUX

Genmab A/S

24/06/2024

12:36:49 PM

1,803.0000

86

XCSE

Genmab A/S

24/06/2024

12:36:49 PM

1,803.0000

78

CEUX

Genmab A/S

24/06/2024

12:36:49 PM

1,803.0000

12

TQEX

Genmab A/S

24/06/2024

12:36:49 PM

1,803.0000

11

CEUX

Genmab A/S

24/06/2024

12:37:02 PM

1,802.5000

46

XCSE

Genmab A/S

24/06/2024

12:37:02 PM

1,802.5000

46

XCSE

Genmab A/S

24/06/2024

12:37:02 PM

1,802.5000

29

XCSE

Genmab A/S

24/06/2024

12:37:10 PM

1,802.0000

45

XCSE

Genmab A/S

24/06/2024

12:37:10 PM

1,802.0000

46

XCSE

Genmab A/S

24/06/2024

12:37:10 PM

1,802.0000

45

XCSE

Genmab A/S

24/06/2024

12:37:10 PM

1,802.0000

46

XCSE

Genmab A/S

24/06/2024

12:37:10 PM

1,802.0000

32

XCSE

Genmab A/S

24/06/2024

12:37:10 PM

1,802.0000

31

XCSE

Genmab A/S

24/06/2024

12:37:10 PM

1,802.0000

4

XCSE

Genmab A/S

24/06/2024

12:43:19 PM

1,800.0000

25

XCSE

Genmab A/S

24/06/2024

12:43:19 PM

1,800.0000

21

XCSE

Genmab A/S

24/06/2024

12:43:19 PM

1,800.0000

125

XCSE

Genmab A/S

24/06/2024

12:43:19 PM

1,800.0000

72

XCSE

Genmab A/S

24/06/2024

12:43:19 PM

1,800.0000

51

XCSE

Genmab A/S

24/06/2024

12:45:09 PM

1,798.5000

22

XCSE

Genmab A/S

24/06/2024

12:45:09 PM

1,798.5000

22

XCSE

Genmab A/S

24/06/2024

12:45:09 PM

1,798.5000

1

XCSE

Genmab A/S

24/06/2024

12:45:09 PM

1,798.5000

22

CEUX

Genmab A/S

24/06/2024

12:45:09 PM

1,798.5000

4

AQEU

Genmab A/S

24/06/2024

12:45:09 PM

1,798.5000

5

TQEX

Genmab A/S

24/06/2024

12:45:09 PM

1,798.5000

18

AQEU

Genmab A/S

24/06/2024

12:48:55 PM

1,799.5000

41

XCSE

Genmab A/S

24/06/2024

12:48:55 PM

1,799.5000

29

XCSE

Genmab A/S

24/06/2024

12:48:55 PM

1,799.5000

14

XCSE

Genmab A/S

24/06/2024

12:48:55 PM

1,799.5000

45

XCSE

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

45

CEUX

20


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

45

CEUX

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

1

CEUX

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

4

AQEU

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

3

AQEU

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

3

AQEU

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

4

AQEU

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

7

AQEU

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

7

AQEU

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

7

TQEX

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

7

TQEX

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

7

TQEX

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

7

TQEX

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

51

XCSE

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

49

XCSE

Genmab A/S

24/06/2024

12:53:50 PM

1,800.5000

34

CEUX

Genmab A/S

24/06/2024

12:55:53 PM

1,801.0000

13

CEUX

Genmab A/S

24/06/2024

12:55:54 PM

1,801.0000

13

CEUX

Genmab A/S

24/06/2024

12:55:55 PM

1,801.0000

13

CEUX

Genmab A/S

24/06/2024

12:55:55 PM

1,801.0000

14

XCSE

Genmab A/S

24/06/2024

12:55:56 PM

1,801.0000

13

CEUX

Genmab A/S

24/06/2024

12:57:57 PM

1,800.5000

95

XCSE

Genmab A/S

24/06/2024

12:57:57 PM

1,800.5000

85

CEUX

Genmab A/S

24/06/2024

12:57:57 PM

1,800.5000

12

AQEU

Genmab A/S

24/06/2024

12:57:57 PM

1,800.5000

14

TQEX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

42

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

42

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

13

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

42

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

13

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

20

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

6

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

6

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

6

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

6

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

6

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

7

TQEX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

4

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

4

CEUX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

6

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

5

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

5

AQEU

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

7

TQEX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

7

TQEX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

7

TQEX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

7

TQEX

Genmab A/S

24/06/2024

1:03:01 PM

1,801.5000

1

AQEU

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

50

CEUX

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

39

CEUX

21


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

38

CEUX

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

56

XCSE

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

2

AQEU

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

12

CEUX

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

6

CEUX

Genmab A/S

24/06/2024

1:08:53 PM

1,803.0000

6

AQEU

Genmab A/S

24/06/2024

1:09:00 PM

1,803.0000

43

CEUX

Genmab A/S

24/06/2024

1:09:00 PM

1,803.0000

6

AQEU

Genmab A/S

24/06/2024

1:09:00 PM

1,803.0000

48

XCSE

Genmab A/S

24/06/2024

1:11:35 PM

1,802.5000

26

XCSE

Genmab A/S

24/06/2024

1:11:35 PM

1,802.5000

81

CEUX

Genmab A/S

24/06/2024

1:14:20 PM

1,802.0000

119

CEUX

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

22

CEUX

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

17

CEUX

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

3

AQEU

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

9

AQEU

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

5

TQEX

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

9

TQEX

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

23

XCSE

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

39

XCSE

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

21

CEUX

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

5

TQEX

Genmab A/S

24/06/2024

1:14:52 PM

1,807.0000

3

TQEX

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

45

CEUX

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

7

AQEU

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

6

TQEX

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

49

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

25

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

32

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

7

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

7

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

25

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

25

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

25

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.5000

18

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.0000

43

XCSE

Genmab A/S

24/06/2024

1:16:52 PM

1,805.0000

43

XCSE

Genmab A/S

24/06/2024

1:16:53 PM

1,805.0000

22

XCSE

Genmab A/S

24/06/2024

1:25:11 PM

1,803.0000

1

XCSE

Genmab A/S

24/06/2024

1:26:08 PM

1,803.5000

40

AQEU

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

10

XCSE

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

31

XCSE

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

31

XCSE

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

38

CEUX

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

38

CEUX

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

6

AQEU

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

5

TQEX

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

6

AQEU

22


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

5

TQEX

Genmab A/S

24/06/2024

1:28:35 PM

1,802.5000

31

XCSE

Genmab A/S

24/06/2024

1:29:43 PM

1,803.0000

3

CEUX

Genmab A/S

24/06/2024

1:29:43 PM

1,803.0000

1

CEUX

Genmab A/S

24/06/2024

1:29:43 PM

1,803.0000

10

AQEU

Genmab A/S

24/06/2024

1:29:43 PM

1,803.0000

10

TQEX

Genmab A/S

24/06/2024

1:29:44 PM

1,803.0000

10

XCSE

Genmab A/S

24/06/2024

1:30:10 PM

1,803.0000

13

CEUX

Genmab A/S

24/06/2024

1:30:10 PM

1,803.0000

3

CEUX

Genmab A/S

24/06/2024

1:30:10 PM

1,803.0000

9

AQEU

Genmab A/S

24/06/2024

1:30:10 PM

1,803.0000

9

TQEX

Genmab A/S

24/06/2024

1:30:40 PM

1,803.0000

3

CEUX

Genmab A/S

24/06/2024

1:30:40 PM

1,803.0000

1

TQEX

Genmab A/S

24/06/2024

1:30:40 PM

1,803.0000

10

XCSE

Genmab A/S

24/06/2024

1:30:40 PM

1,803.0000

12

XCSE

Genmab A/S

24/06/2024

1:32:35 PM

1,804.5000

3

XCSE

Genmab A/S

24/06/2024

1:32:37 PM

1,804.5000

4

XCSE

Genmab A/S

24/06/2024

1:32:37 PM

1,804.5000

4

XCSE

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

26

XCSE

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

42

XCSE

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

18

XCSE

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

25

CEUX

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

38

CEUX

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

25

CEUX

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

6

CEUX

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

5

TQEX

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

6

TQEX

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

25

CEUX

Genmab A/S

24/06/2024

1:33:51 PM

1,805.0000

25

CEUX

Genmab A/S

24/06/2024

1:34:40 PM

1,810.0000

1

AQEU

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

5

TQEX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

5

TQEX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

XCSE

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

XCSE

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

4

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

8

CEUX

Genmab A/S

24/06/2024

1:35:29 PM

1,810.0000

5

TQEX

Genmab A/S

24/06/2024

1:35:48 PM

1,810.5000

14

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

9

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

9

XCSE

23


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

28

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

9

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

30

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

9

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

11

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,810.5000

30

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

16

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

13

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

2

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

8

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

28

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

3

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

2

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

3

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

28

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

28

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

3

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

10

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

3

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

3

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

3

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

8

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

10

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

10

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

10

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

12

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

9

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

31

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

6

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

33

XCSE

24


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

33

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

33

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

19

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

33

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

1

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

33

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

33

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

33

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

30

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

30

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

3

AQEU

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

29

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

2

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

29

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

2

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.5000

21

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

5

TQEX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

12

CEUX

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

12

XCSE

Genmab A/S

24/06/2024

1:37:51 PM

1,809.0000

5

TQEX

Genmab A/S

24/06/2024

1:45:55 PM

1,812.5000

36

CEUX

Genmab A/S

24/06/2024

1:45:55 PM

1,812.5000

4

CEUX

Genmab A/S

24/06/2024

1:45:55 PM

1,812.5000

4

CEUX

Genmab A/S

24/06/2024

1:45:55 PM

1,812.5000

4

CEUX

Genmab A/S

24/06/2024

1:45:55 PM

1,812.5000

6

AQEU

Genmab A/S

24/06/2024

1:45:55 PM

1,812.5000

5

AQEU

Genmab A/S

24/06/2024

1:45:55 PM

1,812.5000

32

CEUX

Genmab A/S

24/06/2024

1:45:58 PM

1,813.0000

4

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

26

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

26

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

AQEU

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

AQEU

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

AQEU

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

2

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

2

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

34

XCSE

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

35

XCSE

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

34

XCSE

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

10

XCSE

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

25

XCSE

25


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

27

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

AQEU

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

TQEX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

5

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

68

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.5000

38

CEUX

Genmab A/S

24/06/2024

1:46:15 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

24

XCSE

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

24

XCSE

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

23

CEUX

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

23

CEUX

Genmab A/S

24/06/2024

1:46:21 PM

1,813.0000

23

CEUX

Genmab A/S

24/06/2024

1:46:27 PM

1,813.0000

7

XCSE

Genmab A/S

24/06/2024

1:46:27 PM

1,813.0000

17

XCSE

Genmab A/S

24/06/2024

1:46:27 PM

1,813.0000

17

XCSE

Genmab A/S

24/06/2024

1:46:27 PM

1,813.0000

17

XCSE

Genmab A/S

24/06/2024

1:49:13 PM

1,813.5000

11

AQEU

Genmab A/S

24/06/2024

1:49:13 PM

1,813.5000

2

AQEU

Genmab A/S

24/06/2024

1:49:13 PM

1,813.5000

9

AQEU

Genmab A/S

24/06/2024

1:49:13 PM

1,813.5000

30

XCSE

Genmab A/S

24/06/2024

1:49:13 PM

1,813.5000

27

XCSE

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

7

CEUX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

7

CEUX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

7

CEUX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

2

CEUX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

7

TQEX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

7

TQEX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

6

TQEX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

7

TQEX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

6

TQEX

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

6

XCSE

Genmab A/S

24/06/2024

1:49:43 PM

1,813.0000

6

XCSE

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

34

XCSE

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

34

XCSE

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

32

CEUX

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

32

CEUX

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

4

AQEU

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

7

TQEX

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

32

CEUX

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

7

TQEX

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

34

XCSE

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

20

CEUX

Genmab A/S

24/06/2024

1:52:41 PM

1,812.0000

10

TQEX

26


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

1

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

9

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

2

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

16

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

9

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

1

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

2

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

1

TQEX

Genmab A/S

24/06/2024

1:54:58 PM

1,813.5000

2

TQEX

Genmab A/S

24/06/2024

2:00:00 PM

1,813.0000

36

CEUX

Genmab A/S

24/06/2024

2:00:00 PM

1,813.0000

7

CEUX

Genmab A/S

24/06/2024

2:00:00 PM

1,813.0000

10

CEUX

Genmab A/S

24/06/2024

2:00:00 PM

1,813.5000

27

XCSE

Genmab A/S

24/06/2024

2:00:37 PM

1,813.5000

10

XCSE

Genmab A/S

24/06/2024

2:01:03 PM

1,814.0000

1

CEUX

Genmab A/S

24/06/2024

2:01:03 PM

1,814.0000

1

TQEX

Genmab A/S

24/06/2024

2:01:04 PM

1,814.0000

2

CEUX

Genmab A/S

24/06/2024

2:02:07 PM

1,814.0000

1

CEUX

Genmab A/S

24/06/2024

2:04:11 PM

1,814.0000

10

XCSE

Genmab A/S

24/06/2024

2:04:11 PM

1,814.0000

11

XCSE

Genmab A/S

24/06/2024

2:04:11 PM

1,814.0000

25

XCSE

Genmab A/S

24/06/2024

2:04:11 PM

1,814.0000

19

CEUX

Genmab A/S

24/06/2024

2:04:11 PM

1,814.0000

25

CEUX

Genmab A/S

24/06/2024

2:04:11 PM

1,814.0000

6

TQEX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

19

CEUX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

11

CEUX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

8

CEUX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

3

AQEU

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

3

AQEU

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

11

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

10

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

11

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

8

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

5

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

8

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

21

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

21

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

17

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

4

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

17

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

19

CEUX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

19

CEUX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

19

CEUX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

19

CEUX

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

21

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

21

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.5000

11

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.5000

39

XCSE

27


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:04:33 PM

1,814.5000

30

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.5000

27

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

21

XCSE

Genmab A/S

24/06/2024

2:04:33 PM

1,814.0000

9

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

17

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

33

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

36

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

17

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

19

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

63

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

34

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

29

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

5

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

44

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

12

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

63

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

9

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

29

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

9

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

3

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

9

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

9

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

9

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

2

AQEU

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

TQEX

28


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

25

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

44

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

17

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

11

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

63

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

16

CEUX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

7

TQEX

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

58

XCSE

Genmab A/S

24/06/2024

2:06:12 PM

1,814.5000

17

XCSE

Genmab A/S

24/06/2024

2:06:59 PM

1,815.0000

9

CEUX

Genmab A/S

24/06/2024

2:06:59 PM

1,815.0000

10

CEUX

Genmab A/S

24/06/2024

2:06:59 PM

1,815.0000

8

CEUX

Genmab A/S

24/06/2024

2:06:59 PM

1,815.0000

1

XCSE

Genmab A/S

24/06/2024

2:06:59 PM

1,815.0000

3

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

8

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

8

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

8

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

8

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

8

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

5

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

3

XCSE

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

9

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

9

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

7

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

9

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

13

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

7

CEUX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

5

TQEX

Genmab A/S

24/06/2024

2:09:11 PM

1,818.0000

5

TQEX

Genmab A/S

24/06/2024

2:09:56 PM

1,818.0000

5

XCSE

Genmab A/S

24/06/2024

2:10:22 PM

1,820.5000

36

XCSE

Genmab A/S

24/06/2024

2:10:22 PM

1,820.5000

27

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

24

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

30

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

24

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

24

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

XCSE

29


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

24

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

23

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

10

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

3

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

10

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

3

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

9

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

11

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

23

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

23

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

10

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

9

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

1

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

9

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

17

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

7

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

10

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

23

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

13

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

14

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

4

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

11

CEUX

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

9

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

24

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

4

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

6

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

7

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

18

XCSE

Genmab A/S

24/06/2024

2:10:59 PM

1,821.0000

6

XCSE

Genmab A/S

24/06/2024

2:12:23 PM

1,821.0000

34

XCSE

Genmab A/S

24/06/2024

2:12:24 PM

1,821.0000

30

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

16

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

3

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

16

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

3

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

19

CEUX

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

19

CEUX

30


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

19

CEUX

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

4

CEUX

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

5

TQEX

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

3

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

13

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

13

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

18

XCSE

Genmab A/S

24/06/2024

2:13:49 PM

1,821.0000

24

XCSE

Genmab A/S

24/06/2024

2:14:00 PM

1,821.0000

14

CEUX

Genmab A/S

24/06/2024

2:14:00 PM

1,821.0000

11

TQEX

Genmab A/S

24/06/2024

2:14:00 PM

1,821.0000

15

XCSE

Genmab A/S

24/06/2024

2:14:14 PM

1,821.0000

8

XCSE

Genmab A/S

24/06/2024

2:14:14 PM

1,821.0000

27

XCSE

Genmab A/S

24/06/2024

2:14:14 PM

1,821.0000

1

XCSE

Genmab A/S

24/06/2024

2:14:30 PM

1,820.7500

25

CEUX

Genmab A/S

24/06/2024

2:14:30 PM

1,821.0000

14

TQEX

Genmab A/S

24/06/2024

2:14:54 PM

1,821.0000

30

XCSE

Genmab A/S

24/06/2024

2:15:07 PM

1,821.0000

30

XCSE

Genmab A/S

24/06/2024

2:15:07 PM

1,821.0000

1

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

49

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

15

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

8

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

26

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

23

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

34

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

7

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

8

TQEX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

8

TQEX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

54

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

11

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

15

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

6

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

5

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

2

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

8

TQEX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

4

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

8

TQEX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

7

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

30

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

35

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

83

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.5000

13

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

31


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

38

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

21

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

50

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

24

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

24

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

38

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

21

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

31

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

3

AQEU

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

21

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

9

XCSE

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

5

CEUX

Genmab A/S

24/06/2024

2:15:10 PM

1,820.0000

21

XCSE

Genmab A/S

24/06/2024

2:15:11 PM

1,820.0000

20

XCSE

Genmab A/S

24/06/2024

2:15:11 PM

1,820.0000

1

XCSE

Genmab A/S

24/06/2024

2:15:13 PM

1,820.0000

11

CEUX

Genmab A/S

24/06/2024

2:15:13 PM

1,820.0000

21

XCSE

Genmab A/S

24/06/2024

2:15:13 PM

1,820.0000

6

XCSE

Genmab A/S

24/06/2024

2:15:13 PM

1,820.0000

20

CEUX

Genmab A/S

24/06/2024

2:22:43 PM

1,819.0000

458

CEUX

Genmab A/S

24/06/2024

2:23:45 PM

1,819.0000

23

XCSE

Genmab A/S

24/06/2024

2:23:45 PM

1,819.0000

225

XCSE

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

1

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

3

AQEU

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

22

AQEU

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

22

TQEX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

6

XCSE

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

21

CEUX

32


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

20

CEUX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

1

AQEU

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

2

XCSE

Genmab A/S

24/06/2024

2:23:56 PM

1,819.0000

20

XCSE

Genmab A/S

24/06/2024

2:28:47 PM

1,818.0000

118

CEUX

Genmab A/S

24/06/2024

2:32:16 PM

1,818.5000

3

TQEX

Genmab A/S

24/06/2024

2:32:16 PM

1,818.5000

10

XCSE

Genmab A/S

24/06/2024

2:32:16 PM

1,818.5000

8

XCSE

Genmab A/S

24/06/2024

2:32:29 PM

1,818.5000

7

TQEX

Genmab A/S

24/06/2024

2:32:29 PM

1,818.5000

3

XCSE

Genmab A/S

24/06/2024

2:32:45 PM

1,818.5000

10

XCSE

Genmab A/S

24/06/2024

2:32:45 PM

1,818.5000

3

XCSE

Genmab A/S

24/06/2024

2:33:00 PM

1,818.5000

14

XCSE

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

40

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

17

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

40

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

17

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

40

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

17

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

40

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

13

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

40

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

7

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

40

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

39

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

2

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

6

AQEU

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

2

AQEU

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

6

AQEU

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

2

AQEU

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

6

AQEU

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

2

AQEU

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

45

XCSE

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

16

XCSE

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

38

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

16

CEUX

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

45

XCSE

Genmab A/S

24/06/2024

2:34:12 PM

1,819.0000

60

XCSE

Genmab A/S

24/06/2024

2:34:13 PM

1,819.0000

29

CEUX

Genmab A/S

24/06/2024

2:34:13 PM

1,819.0000

10

XCSE

Genmab A/S

24/06/2024

2:34:13 PM

1,819.0000

35

XCSE

Genmab A/S

24/06/2024

2:34:13 PM

1,819.0000

40

XCSE

33


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:34:13 PM

1,819.0000

11

CEUX

Genmab A/S

24/06/2024

2:35:46 PM

1,819.0000

41

CEUX

Genmab A/S

24/06/2024

2:35:46 PM

1,819.0000

6

AQEU

Genmab A/S

24/06/2024

2:35:46 PM

1,819.0000

6

TQEX

Genmab A/S

24/06/2024

2:35:46 PM

1,819.0000

45

XCSE

Genmab A/S

24/06/2024

2:35:46 PM

1,819.0000

43

XCSE

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

20

CEUX

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

45

XCSE

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

45

XCSE

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

45

XCSE

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

18

CEUX

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

19

XCSE

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

3

CEUX

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

6

AQEU

Genmab A/S

24/06/2024

2:35:54 PM

1,819.0000

7

CEUX

Genmab A/S

24/06/2024

2:36:02 PM

1,817.5000

20

CEUX

Genmab A/S

24/06/2024

2:36:02 PM

1,817.5000

20

CEUX

Genmab A/S

24/06/2024

2:36:02 PM

1,817.5000

17

CEUX

Genmab A/S

24/06/2024

2:36:02 PM

1,817.5000

3

AQEU

Genmab A/S

24/06/2024

2:36:02 PM

1,817.5000

5

TQEX

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

6

CEUX

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

1

CEUX

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

22

XCSE

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

22

XCSE

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

24

XCSE

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

5

TQEX

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

25

CEUX

Genmab A/S

24/06/2024

2:36:06 PM

1,817.5000

30

XCSE

Genmab A/S

24/06/2024

2:36:06 PM

1,817.0000

10

XCSE

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

16

XCSE

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

80

XCSE

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

17

CEUX

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

2

AQEU

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

5

TQEX

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

30

XCSE

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

40

XCSE

Genmab A/S

24/06/2024

2:37:18 PM

1,817.5000

82

XCSE

Genmab A/S

24/06/2024

2:37:21 PM

1,817.0000

19

CEUX

Genmab A/S

24/06/2024

2:37:21 PM

1,817.0000

22

XCSE

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

2

CEUX

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

66

CEUX

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

11

TQEX

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

76

XCSE

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

50

XCSE

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

47

CEUX

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

10

AQEU

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

11

TQEX

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

1

TQEX

34


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:40:29 PM

1,815.5000

5

TQEX

Genmab A/S

24/06/2024

2:40:29 PM

1,816.0000

40

CEUX

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

17

XCSE

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

7

XCSE

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

7

XCSE

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

23

CEUX

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

4

CEUX

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

3

AQEU

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

5

TQEX

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

19

CEUX

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

14

CEUX

Genmab A/S

24/06/2024

2:42:49 PM

1,817.0000

5

TQEX

Genmab A/S

24/06/2024

2:42:51 PM

1,817.0000

24

XCSE

Genmab A/S

24/06/2024

2:44:09 PM

1,816.0000

182

CEUX

Genmab A/S

24/06/2024

2:45:45 PM

1,815.5000

20

CEUX

Genmab A/S

24/06/2024

2:45:45 PM

1,815.5000

51

CEUX

Genmab A/S

24/06/2024

2:45:45 PM

1,815.5000

5

TQEX

Genmab A/S

24/06/2024

2:45:45 PM

1,815.5000

8

TQEX

Genmab A/S

24/06/2024

2:45:45 PM

1,815.5000

20

XCSE

Genmab A/S

24/06/2024

2:45:45 PM

1,815.5000

57

XCSE

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

20

XCSE

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

3

XCSE

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

84

XCSE

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

20

XCSE

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

60

XCSE

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

20

CEUX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

26

CEUX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

53

CEUX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

20

CEUX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

20

CEUX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

11

CEUX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

16

CEUX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

2

AQEU

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

11

AQEU

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

42

AQEU

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

5

TQEX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

12

TQEX

Genmab A/S

24/06/2024

2:46:08 PM

1,815.5000

40

CEUX

Genmab A/S

24/06/2024

2:47:05 PM

1,815.0000

5

CEUX

Genmab A/S

24/06/2024

2:54:07 PM

1,817.5000

7

XCSE

Genmab A/S

24/06/2024

2:54:07 PM

1,817.5000

13

XCSE

Genmab A/S

24/06/2024

2:54:07 PM

1,817.5000

27

XCSE

Genmab A/S

24/06/2024

2:54:08 PM

1,817.5000

4

XCSE

Genmab A/S

24/06/2024

2:55:11 PM

1,817.5000

1

XCSE

Genmab A/S

24/06/2024

2:55:11 PM

1,817.5000

27

XCSE

Genmab A/S

24/06/2024

2:55:43 PM

1,818.0000

945

CEUX

Genmab A/S

24/06/2024

2:56:25 PM

1,818.5000

1,082

CEUX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

16

XCSE

35


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

57

XCSE

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

18

XCSE

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

18

XCSE

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

57

XCSE

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

17

CEUX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

16

CEUX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

1

CEUX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

16

CEUX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

2

AQEU

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

2

AQEU

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

5

TQEX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

8

CEUX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

5

TQEX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

5

TQEX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

9

CEUX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

5

TQEX

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

13

XCSE

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

42

XCSE

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

42

XCSE

Genmab A/S

24/06/2024

2:57:13 PM

1,818.0000

13

XCSE

Genmab A/S

24/06/2024

3:02:25 PM

1,821.5000

35

XCSE

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

1

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

XCSE

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

44

XCSE

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

XCSE

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

XCSE

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

51

XCSE

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

1

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

11

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

20

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

12

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

8

CEUX

Genmab A/S

24/06/2024

3:03:20 PM

1,821.0000

1

AQEU

Genmab A/S

24/06/2024

3:03:21 PM

1,820.5000

21

CEUX

36


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

3:03:21 PM

1,820.5000

21

CEUX

Genmab A/S

24/06/2024

3:03:21 PM

1,820.5000

21

CEUX

Genmab A/S

24/06/2024

3:03:21 PM

1,820.5000

21

CEUX

Genmab A/S

24/06/2024

3:03:21 PM

1,820.5000

3

AQEU

Genmab A/S

24/06/2024

3:03:21 PM

1,820.5000

3

AQEU

Genmab A/S

24/06/2024

3:03:21 PM

1,820.5000

10

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

23

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

19

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

50

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

7

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

19

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

12

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

19

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

2

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

21

CEUX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

19

CEUX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

3

AQEU

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

2

AQEU

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

6

AQEU

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

3

AQEU

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

5

TQEX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

5

TQEX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

21

CEUX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

19

CEUX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

21

CEUX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

19

CEUX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.0000

19

CEUX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:39 PM

1,819.0000

2

AQEU

Genmab A/S

24/06/2024

3:03:39 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.0000

1

TQEX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.0000

5

TQEX

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

13

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

39

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

6

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

6

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

19

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

24

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

16

XCSE

Genmab A/S

24/06/2024

3:03:39 PM

1,819.5000

5

XCSE

Genmab A/S

24/06/2024

3:03:40 PM

1,819.5000

2

XCSE

Genmab A/S

24/06/2024

3:03:48 PM

1,819.5000

43

XCSE

Genmab A/S

24/06/2024

3:03:48 PM

1,819.5000

1

XCSE

Genmab A/S

24/06/2024

3:05:24 PM

1,817.0000

18

XCSE

Genmab A/S

24/06/2024

3:09:27 PM

1,817.0000

1

CEUX

Genmab A/S

24/06/2024

3:09:27 PM

1,817.0000

44

CEUX

Genmab A/S

24/06/2024

3:09:27 PM

1,817.0000

37

CEUX

Genmab A/S

24/06/2024

3:09:27 PM

1,817.0000

10

CEUX

37


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

3:09:27 PM

1,817.0000

21

CEUX

Genmab A/S

24/06/2024

3:09:27 PM

1,817.0000

7

AQEU

Genmab A/S

24/06/2024

3:09:27 PM

1,817.0000

4

AQEU

Genmab A/S

24/06/2024

3:09:28 PM

1,817.0000

2

AQEU

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

5

XCSE

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

46

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

36

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,819.0000

37

TQEX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

36

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

6

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

4

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

23

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

14

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

6

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

3

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

46

XCSE

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

8

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

7

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

31

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

7

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

4

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

42

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

4

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

46

CEUX

Genmab A/S

24/06/2024

3:12:05 PM

1,818.5000

5

CEUX

Genmab A/S

24/06/2024

3:12:06 PM

1,818.5000

21

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

41

CEUX

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

46

CEUX

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

5

CEUX

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

30

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

30

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

21

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

15

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

21

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

15

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

44

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

7

XCSE

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

36

CEUX

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

4

CEUX

Genmab A/S

24/06/2024

3:12:07 PM

1,818.5000

134

CEUX

Genmab A/S

24/06/2024

3:13:23 PM

1,816.0000

20

XCSE

Genmab A/S

24/06/2024

3:13:23 PM

1,816.0000

9

XCSE

Genmab A/S

24/06/2024

3:17:50 PM

1,815.2500

32

CEUX

Genmab A/S

24/06/2024

3:17:50 PM

1,815.5000

2

TQEX

Genmab A/S

24/06/2024

3:17:50 PM

1,815.5000

1

XCSE

Genmab A/S

24/06/2024

3:17:50 PM

1,815.5000

3

CEUX

Genmab A/S

24/06/2024

3:18:00 PM

1,815.2500

22

CEUX

Genmab A/S

24/06/2024

3:18:00 PM

1,815.5000

2

TQEX

38


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

3:18:00 PM

1,815.5000

3

XCSE

Genmab A/S

24/06/2024

3:18:54 PM

1,815.0000

1

AQEU

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

8

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

8

CEUX

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

8

CEUX

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

5

TQEX

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

5

TQEX

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

8

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

17

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

8

CEUX

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

2

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

6

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

6

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

2

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

8

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

8

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

22

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

22

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

22

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

6

XCSE

Genmab A/S

24/06/2024

3:20:04 PM

1,815.0000

3

XCSE

Genmab A/S

24/06/2024

3:20:05 PM

1,814.5000

14

XCSE

Genmab A/S

24/06/2024

3:20:42 PM

1,814.7500

37

CEUX

Genmab A/S

24/06/2024

3:21:13 PM

1,814.5000

7

XCSE

Genmab A/S

24/06/2024

3:21:17 PM

1,814.5000

3

CEUX

Genmab A/S

24/06/2024

3:21:17 PM

1,814.5000

71

CEUX

Genmab A/S

24/06/2024

3:21:17 PM

1,814.5000

35

CEUX

Genmab A/S

24/06/2024

3:21:17 PM

1,814.5000

16

AQEU

Genmab A/S

24/06/2024

3:21:17 PM

1,814.5000

16

TQEX

Genmab A/S

24/06/2024

3:21:17 PM

1,814.5000

50

XCSE

Genmab A/S

24/06/2024

3:21:17 PM

1,814.5000

50

XCSE

Genmab A/S

24/06/2024

3:21:17 PM

1,813.5000

16

XCSE

Genmab A/S

24/06/2024

3:21:17 PM

1,813.5000

26

XCSE

Genmab A/S

24/06/2024

3:21:18 PM

1,813.5000

19

XCSE

Genmab A/S

24/06/2024

3:21:18 PM

1,813.5000

23

XCSE

Genmab A/S

24/06/2024

3:21:18 PM

1,813.5000

32

XCSE

Genmab A/S

24/06/2024

3:21:18 PM

1,813.5000

12

XCSE

Genmab A/S

24/06/2024

3:28:56 PM

1,814.0000

22

CEUX

Genmab A/S

24/06/2024

3:28:56 PM

1,814.5000

10

XCSE

Genmab A/S

24/06/2024

3:28:56 PM

1,814.5000

6

XCSE

Genmab A/S

24/06/2024

3:29:31 PM

1,814.5000

10

AQEU

Genmab A/S

24/06/2024

3:29:50 PM

1,814.0000

5

AQEU

Genmab A/S

24/06/2024

3:29:50 PM

1,814.0000

5

TQEX

Genmab A/S

24/06/2024

3:29:50 PM

1,814.0000

5

TQEX

Genmab A/S

24/06/2024

3:29:50 PM

1,814.0000

9

XCSE

Genmab A/S

24/06/2024

3:29:50 PM

1,814.0000

27

XCSE

Genmab A/S

24/06/2024

3:29:50 PM

1,814.0000

36

XCSE

Genmab A/S

24/06/2024

3:29:50 PM

1,814.0000

16

XCSE

39


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

3:29:51 PM

1,814.0000

8

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

5

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

1

AQEU

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

12

AQEU

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

10

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

105

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

5

TQEX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

41

TQEX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

30

CEUX

Genmab A/S

24/06/2024

3:30:39 PM

1,817.0000

1

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

19

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

6

TQEX

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

6

TQEX

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

19

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

39

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

5

AQEU

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

5

AQEU

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

6

TQEX

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

6

TQEX

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

38

XCSE

Genmab A/S

24/06/2024

3:30:39 PM

1,815.5000

8

XCSE

Genmab A/S

24/06/2024

3:30:40 PM

1,815.5000

5

AQEU

Genmab A/S

24/06/2024

3:30:40 PM

1,815.5000

5

AQEU

Genmab A/S

24/06/2024

3:30:40 PM

1,815.5000

14

XCSE

Genmab A/S

24/06/2024

3:30:40 PM

1,815.5000

31

XCSE

Genmab A/S

24/06/2024

3:34:05 PM

1,816.5000

15

XCSE

Genmab A/S

24/06/2024

3:34:57 PM

1,815.5000

7

XCSE

Genmab A/S

24/06/2024

3:36:12 PM

1,820.5000

72

XCSE

Genmab A/S

24/06/2024

3:36:12 PM

1,820.5000

70

XCSE

Genmab A/S

24/06/2024

3:36:12 PM

1,820.5000

44

XCSE

Genmab A/S

24/06/2024

3:36:35 PM

1,817.0000

23

XCSE

Genmab A/S

24/06/2024

3:36:35 PM

1,817.0000

22

CEUX

Genmab A/S

24/06/2024

3:36:35 PM

1,817.0000

5

TQEX

Genmab A/S

24/06/2024

3:36:36 PM

1,817.0000

23

XCSE

Genmab A/S

24/06/2024

3:39:33 PM

1,817.5000

27

XCSE

Genmab A/S

24/06/2024

3:39:33 PM

1,817.5000

90

XCSE

Genmab A/S

24/06/2024

3:39:33 PM

1,817.5000

7

TQEX

Genmab A/S

24/06/2024

3:39:33 PM

1,817.5000

7

AQEU

40


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

3:39:33 PM

1,817.5000

4

TQEX

Genmab A/S

24/06/2024

3:39:33 PM

1,817.5000

52

XCSE

Genmab A/S

24/06/2024

3:39:34 PM

1,817.5000

6

AQEU

Genmab A/S

24/06/2024

3:39:34 PM

1,817.5000

17

XCSE

Genmab A/S

24/06/2024

3:40:41 PM

1,818.0000

22

XCSE

Genmab A/S

24/06/2024

3:40:50 PM

1,821.0000

22

XCSE

Genmab A/S

24/06/2024

3:40:50 PM

1,821.0000

9

XCSE

Genmab A/S

24/06/2024

3:41:05 PM

1,820.5000

13

XCSE

Genmab A/S

24/06/2024

3:41:05 PM

1,820.5000

7

XCSE

Genmab A/S

24/06/2024

3:41:05 PM

1,820.5000

7

XCSE

Genmab A/S

24/06/2024

3:41:05 PM

1,820.5000

13

XCSE

Genmab A/S

24/06/2024

3:41:05 PM

1,820.5000

20

XCSE

Genmab A/S

24/06/2024

3:41:58 PM

1,818.0000

24

XCSE

Genmab A/S

24/06/2024

3:41:58 PM

1,818.0000

24

XCSE

Genmab A/S

24/06/2024

3:41:58 PM

1,818.0000

24

XCSE

Genmab A/S

24/06/2024

3:41:58 PM

1,818.0000

24

XCSE

Genmab A/S

24/06/2024

3:41:58 PM

1,818.0000

24

XCSE

Genmab A/S

24/06/2024

3:44:00 PM

1,818.5000

5

TQEX

Genmab A/S

24/06/2024

3:44:00 PM

1,818.5000

5

TQEX

Genmab A/S

24/06/2024

3:44:00 PM

1,818.5000

7

TQEX

Genmab A/S

24/06/2024

3:44:00 PM

1,818.5000

7

TQEX

Genmab A/S

24/06/2024

3:44:00 PM

1,818.5000

9

TQEX

Genmab A/S

24/06/2024

3:44:04 PM

1,818.5000

3

AQEU

Genmab A/S

24/06/2024

3:44:04 PM

1,818.5000

10

AQEU

Genmab A/S

24/06/2024

3:44:04 PM

1,818.5000

16

AQEU

Genmab A/S

24/06/2024

3:44:04 PM

1,818.5000

2

AQEU

Genmab A/S

24/06/2024

3:44:04 PM

1,818.5000

6

AQEU

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

27

CEUX

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

19

CEUX

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

4

AQEU

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

4

AQEU

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

4

AQEU

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

4

AQEU

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

10

AQEU

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

5

TQEX

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

5

TQEX

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

29

XCSE

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

20

XCSE

Genmab A/S

24/06/2024

3:44:08 PM

1,817.0000

19

AQEU

Genmab A/S

24/06/2024

3:44:08 PM

1,817.0000

20

TQEX

Genmab A/S

24/06/2024

3:44:08 PM

1,817.0000

46

XCSE

Genmab A/S

24/06/2024

3:44:08 PM

1,817.0000

101

XCSE

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

30

XCSE

Genmab A/S

24/06/2024

3:44:08 PM

1,817.5000

24

XCSE

Genmab A/S

24/06/2024

3:44:08 PM

1,816.0000

10

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.5000

18

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.5000

35

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.0000

30

XCSE

41


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

3:45:52 PM

1,815.0000

1

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.0000

49

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.0000

11

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.0000

20

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.0000

30

XCSE

Genmab A/S

24/06/2024

3:45:52 PM

1,815.0000

5

TQEX

Genmab A/S

24/06/2024

3:48:53 PM

1,813.5000

36

CEUX

Genmab A/S

24/06/2024

3:48:53 PM

1,813.5000

31

CEUX

Genmab A/S

24/06/2024

3:48:53 PM

1,813.5000

10

AQEU

Genmab A/S

24/06/2024

3:48:53 PM

1,813.5000

10

TQEX

Genmab A/S

24/06/2024

3:48:53 PM

1,813.5000

50

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.5000

25

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

11

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

6

AQEU

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

31

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

30

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

50

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

3

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

3

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

3

XCSE

Genmab A/S

24/06/2024

3:48:53 PM

1,813.0000

17

XCSE

Genmab A/S

24/06/2024

3:48:54 PM

1,813.0000

3

XCSE

Genmab A/S

24/06/2024

3:48:55 PM

1,812.5000

4

AQEU

Genmab A/S

24/06/2024

3:48:55 PM

1,812.5000

34

XCSE

Genmab A/S

24/06/2024

3:48:55 PM

1,812.5000

5

TQEX

Genmab A/S

24/06/2024

3:48:55 PM

1,812.5000

5

TQEX

Genmab A/S

24/06/2024

3:48:55 PM

1,812.5000

34

XCSE

Genmab A/S

24/06/2024

3:48:55 PM

1,812.5000

10

XCSE

Genmab A/S

24/06/2024

3:54:36 PM

1,815.5000

11

TQEX

Genmab A/S

24/06/2024

3:54:37 PM

1,815.5000

11

TQEX

Genmab A/S

24/06/2024

3:54:37 PM

1,815.5000

10

AQEU

Genmab A/S

24/06/2024

3:54:37 PM

1,815.5000

76

XCSE

Genmab A/S

24/06/2024

3:54:37 PM

1,815.5000

76

XCSE

Genmab A/S

24/06/2024

3:54:37 PM

1,815.5000

11

TQEX

Genmab A/S

24/06/2024

3:54:38 PM

1,815.5000

9

XCSE

Genmab A/S

24/06/2024

3:54:39 PM

1,815.5000

14

XCSE

Genmab A/S

24/06/2024

3:55:51 PM

1,814.0000

23

XCSE

Genmab A/S

24/06/2024

3:55:51 PM

1,814.0000

50

XCSE

Genmab A/S

24/06/2024

3:55:51 PM

1,814.0000

10

XCSE

Genmab A/S

24/06/2024

3:55:51 PM

1,814.0000

45

XCSE

Genmab A/S

24/06/2024

3:55:51 PM

1,814.0000

14

AQEU

Genmab A/S

24/06/2024

3:55:51 PM

1,814.0000

2

AQEU

Genmab A/S

24/06/2024

3:55:51 PM

1,814.0000

18

TQEX

Genmab A/S

24/06/2024

3:55:52 PM

1,813.0000

2

AQEU

Genmab A/S

24/06/2024

3:55:52 PM

1,813.0000

32

XCSE

Genmab A/S

24/06/2024

3:55:52 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

3:55:52 PM

1,813.0000

32

XCSE

42


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

3:58:48 PM

1,816.0000

3

AQEU

Genmab A/S

24/06/2024

3:58:48 PM

1,816.0000

9

AQEU

Genmab A/S

24/06/2024

3:58:48 PM

1,816.0000

2

AQEU

Genmab A/S

24/06/2024

3:58:48 PM

1,816.0000

16

AQEU

Genmab A/S

24/06/2024

3:58:48 PM

1,816.0000

7

AQEU

Genmab A/S

24/06/2024

3:59:09 PM

1,816.0000

2

AQEU

Genmab A/S

24/06/2024

3:59:09 PM

1,816.0000

16

AQEU

Genmab A/S

24/06/2024

3:59:09 PM

1,816.0000

16

AQEU

Genmab A/S

24/06/2024

3:59:25 PM

1,816.0000

2

AQEU

Genmab A/S

24/06/2024

3:59:25 PM

1,816.0000

16

AQEU

Genmab A/S

24/06/2024

3:59:25 PM

1,816.0000

2

AQEU

Genmab A/S

24/06/2024

3:59:25 PM

1,816.0000

20

AQEU

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

42

CEUX

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

6

AQEU

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

10

AQEU

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

7

TQEX

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

11

TQEX

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

32

XCSE

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

14

XCSE

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

4

XCSE

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

17

XCSE

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

34

XCSE

Genmab A/S

24/06/2024

3:59:46 PM

1,815.0000

24

XCSE

Genmab A/S

24/06/2024

3:59:47 PM

1,814.5000

6

TQEX

Genmab A/S

24/06/2024

3:59:47 PM

1,814.5000

38

XCSE

Genmab A/S

24/06/2024

3:59:58 PM

1,815.0000

26

XCSE

Genmab A/S

24/06/2024

4:00:29 PM

1,814.5000

11

XCSE

Genmab A/S

24/06/2024

4:00:29 PM

1,814.5000

30

XCSE

Genmab A/S

24/06/2024

4:00:29 PM

1,814.5000

30

XCSE

Genmab A/S

24/06/2024

4:00:29 PM

1,814.5000

5

TQEX

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

17

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

7

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

17

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

7

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

41

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

5

TQEX

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

41

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

41

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

14

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

6

AQEU

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

5

TQEX

Genmab A/S

24/06/2024

4:00:30 PM

1,814.0000

30

XCSE

Genmab A/S

24/06/2024

4:00:30 PM

1,814.5000

39

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

13

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

116

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

43


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

17

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

3

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

5

TQEX

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

5

TQEX

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

5

TQEX

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

5

TQEX

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

5

TQEX

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

21

TQEX

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

13

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

13

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

30

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

13

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

13

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

13

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

30

XCSE

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

16

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

2

AQEU

Genmab A/S

24/06/2024

4:03:38 PM

1,812.5000

1

TQEX

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

11

AQEU

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

34

AQEU

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

11

AQEU

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

22

AQEU

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

37

XCSE

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

82

XCSE

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

28

XCSE

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

50

XCSE

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

4

XCSE

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

96

XCSE

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

18

XCSE

Genmab A/S

24/06/2024

4:08:22 PM

1,814.5000

13

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,815.0000

6

TQEX

Genmab A/S

24/06/2024

4:09:44 PM

1,815.0000

39

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,815.0000

18

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,815.0000

50

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,815.0000

34

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,814.5000

34

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,814.5000

2

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,814.5000

1

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,814.5000

39

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,814.5000

2

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,814.5000

1

XCSE

Genmab A/S

24/06/2024

4:09:44 PM

1,814.5000

1

XCSE

Genmab A/S

24/06/2024

4:09:45 PM

1,814.5000

6

TQEX

44


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

4:09:45 PM

1,814.5000

9

XCSE

Genmab A/S

24/06/2024

4:09:46 PM

1,814.5000

50

XCSE

Genmab A/S

24/06/2024

4:12:50 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:12:50 PM

1,811.5000

30

XCSE

Genmab A/S

24/06/2024

4:12:50 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:12:50 PM

1,811.5000

4

AQEU

Genmab A/S

24/06/2024

4:12:50 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

21

XCSE

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

21

XCSE

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

21

XCSE

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

10

XCSE

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

21

XCSE

Genmab A/S

24/06/2024

4:13:41 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

4:13:42 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

4:13:42 PM

1,813.0000

6

XCSE

Genmab A/S

24/06/2024

4:13:42 PM

1,813.0000

5

TQEX

Genmab A/S

24/06/2024

4:13:42 PM

1,813.0000

16

XCSE

Genmab A/S

24/06/2024

4:15:30 PM

1,812.5000

7

XCSE

Genmab A/S

24/06/2024

4:15:30 PM

1,812.5000

37

XCSE

Genmab A/S

24/06/2024

4:15:30 PM

1,812.5000

44

XCSE

Genmab A/S

24/06/2024

4:15:31 PM

1,812.5000

35

XCSE

Genmab A/S

24/06/2024

4:17:17 PM

1,811.5000

8

XCSE

Genmab A/S

24/06/2024

4:17:17 PM

1,811.5000

16

XCSE

Genmab A/S

24/06/2024

4:17:17 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:17:17 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:17:19 PM

1,811.5000

21

XCSE

Genmab A/S

24/06/2024

4:18:59 PM

1,811.5000

37

XCSE

Genmab A/S

24/06/2024

4:19:02 PM

1,811.0000

7

XCSE

Genmab A/S

24/06/2024

4:19:02 PM

1,811.0000

46

XCSE

Genmab A/S

24/06/2024

4:19:02 PM

1,811.0000

149

XCSE

Genmab A/S

24/06/2024

4:19:02 PM

1,811.0000

19

AQEU

Genmab A/S

24/06/2024

4:19:02 PM

1,811.0000

53

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

34

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

8

TQEX

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

5

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

2

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

4

TQEX

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

1

TQEX

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

34

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

34

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

34

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

5

TQEX

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

34

XCSE

45


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

3

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

3

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

2

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

5

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

19

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

5

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

16

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.5000

3

AQEU

Genmab A/S

24/06/2024

4:20:37 PM

1,808.0000

3

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.0000

44

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.0000

21

XCSE

Genmab A/S

24/06/2024

4:20:37 PM

1,808.0000

10

XCSE

Genmab A/S

24/06/2024

4:20:38 PM

1,808.0000

37

XCSE

Genmab A/S

24/06/2024

4:20:38 PM

1,808.0000

21

XCSE

Genmab A/S

24/06/2024

4:20:38 PM

1,808.0000

6

AQEU

Genmab A/S

24/06/2024

4:20:38 PM

1,808.0000

1

XCSE

Genmab A/S

24/06/2024

4:20:38 PM

1,808.0000

10

XCSE

Genmab A/S

24/06/2024

4:20:39 PM

1,808.0000

6

AQEU

Genmab A/S

24/06/2024

4:20:39 PM

1,808.0000

6

AQEU

Genmab A/S

24/06/2024

4:20:39 PM

1,808.0000

15

XCSE

Genmab A/S

24/06/2024

4:25:22 PM

1,811.5000

21

XCSE

Genmab A/S

24/06/2024

4:25:22 PM

1,811.5000

50

XCSE

Genmab A/S

24/06/2024

4:25:22 PM

1,811.5000

50

XCSE

Genmab A/S

24/06/2024

4:25:22 PM

1,811.5000

12

XCSE

Genmab A/S

24/06/2024

4:25:23 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:25:23 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:25:23 PM

1,811.5000

5

TQEX

Genmab A/S

24/06/2024

4:25:23 PM

1,811.5000

21

XCSE

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

18

XCSE

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

32

XCSE

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

5

TQEX

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

18

XCSE

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

3

AQEU

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

1

AQEU

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

5

TQEX

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

3

TQEX

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

18

XCSE

Genmab A/S

24/06/2024

4:28:14 PM

1,810.5000

13

XCSE

Genmab A/S

24/06/2024

4:28:15 PM

1,810.5000

5

TQEX

Genmab A/S

24/06/2024

4:28:15 PM

1,810.5000

18

XCSE

Genmab A/S

24/06/2024

4:28:16 PM

1,810.5000

3

XCSE

Genmab A/S

24/06/2024

4:29:14 PM

1,810.0000

65

XCSE

Genmab A/S

24/06/2024

4:29:14 PM

1,810.0000

46

XCSE

Genmab A/S

24/06/2024

4:29:14 PM

1,810.0000

7

XCSE

Genmab A/S

24/06/2024

4:29:37 PM

1,810.0000

5

TQEX

Genmab A/S

24/06/2024

4:29:37 PM

1,810.0000

41

XCSE

Genmab A/S

24/06/2024

4:31:11 PM

1,810.0000

11

AQEU

Genmab A/S

24/06/2024

4:31:11 PM

1,810.0000

11

TQEX

46


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

4:31:11 PM

1,810.0000

5

XCSE

Genmab A/S

24/06/2024

4:31:11 PM

1,810.0000

12

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

3

AQEU

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

19

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

19

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

28

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

3

AQEU

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

16

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

3

AQEU

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

12

AQEU

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

3

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

94

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

3

AQEU

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

19

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

19

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

19

XCSE

Genmab A/S

24/06/2024

4:31:16 PM

1,809.0000

19

XCSE

Genmab A/S

24/06/2024

4:31:17 PM

1,809.0000

19

XCSE

Genmab A/S

24/06/2024

4:34:05 PM

1,809.0000

33

AQEU

Genmab A/S

24/06/2024

4:34:19 PM

1,809.0000

39

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,808.5000

19

AQEU

Genmab A/S

24/06/2024

4:34:20 PM

1,808.5000

58

AQEU

Genmab A/S

24/06/2024

4:34:20 PM

1,808.5000

21

TQEX

Genmab A/S

24/06/2024

4:34:20 PM

1,808.5000

91

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,808.5000

61

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,808.5000

459

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,808.0000

2

AQEU

Genmab A/S

24/06/2024

4:34:20 PM

1,808.0000

4

AQEU

Genmab A/S

24/06/2024

4:34:20 PM

1,808.0000

43

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,808.0000

27

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,808.0000

38

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

48

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

48

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

7

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

48

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

50

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

48

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

28

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

20

XCSE

Genmab A/S

24/06/2024

4:34:20 PM

1,807.5000

9

XCSE

Genmab A/S

24/06/2024

4:38:34 PM

1,808.0000

3

AQEU

Genmab A/S

24/06/2024

4:38:34 PM

1,808.0000

21

XCSE

Genmab A/S

24/06/2024

4:38:34 PM

1,808.0000

11

XCSE

Genmab A/S

24/06/2024

4:38:34 PM

1,808.0000

3

AQEU

Genmab A/S

24/06/2024

4:38:34 PM

1,808.0000

6

AQEU

Genmab A/S

24/06/2024

4:38:34 PM

1,808.0000

10

XCSE

Genmab A/S

24/06/2024

4:38:34 PM

1,808.0000

141

XCSE

Genmab A/S

24/06/2024

4:40:24 PM

1,808.5000

39

XCSE

47


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

4:40:24 PM

1,808.5000

46

XCSE

Genmab A/S

24/06/2024

4:40:24 PM

1,808.5000

39

XCSE

Genmab A/S

24/06/2024

4:40:24 PM

1,808.5000

46

XCSE

Genmab A/S

24/06/2024

4:40:24 PM

1,808.5000

175

XCSE

Genmab A/S

24/06/2024

4:40:25 PM

1,808.5000

39

XCSE

Genmab A/S

24/06/2024

4:40:25 PM

1,808.5000

46

XCSE

Genmab A/S

24/06/2024

4:44:01 PM

1,809.0000

18

AQEU

Genmab A/S

24/06/2024

4:44:01 PM

1,809.0000

1

AQEU

Genmab A/S

24/06/2024

4:44:01 PM

1,809.0000

139

XCSE

Genmab A/S

24/06/2024

4:44:01 PM

1,809.0000

34

XCSE

Genmab A/S

24/06/2024

4:44:01 PM

1,809.0000

139

XCSE

Genmab A/S

24/06/2024

4:45:50 PM

1,809.5000

15

TQEX

Genmab A/S

24/06/2024

4:45:53 PM

1,809.5000

9

TQEX

Genmab A/S

24/06/2024

4:45:53 PM

1,809.5000

2

TQEX

Genmab A/S

24/06/2024

4:45:53 PM

1,808.5000

10

AQEU

Genmab A/S

24/06/2024

4:45:53 PM

1,808.5000

19

AQEU

Genmab A/S

24/06/2024

4:45:53 PM

1,808.5000

51

XCSE

Genmab A/S

24/06/2024

4:45:56 PM

1,808.5000

10

AQEU

Genmab A/S

24/06/2024

4:45:56 PM

1,808.5000

19

AQEU

Genmab A/S

24/06/2024

4:45:56 PM

1,808.5000

1

AQEU

Genmab A/S

24/06/2024

4:45:56 PM

1,808.5000

23

XCSE

Genmab A/S

24/06/2024

4:45:56 PM

1,808.5000

150

XCSE

Genmab A/S

24/06/2024

4:45:56 PM

1,808.5000

5

XCSE

Genmab A/S

24/06/2024

4:46:41 PM

1,808.5000

35

AQEU

Genmab A/S

24/06/2024

4:46:41 PM

1,808.5000

3

AQEU

Genmab A/S

24/06/2024

4:46:41 PM

1,808.5000

130

XCSE

Genmab A/S

24/06/2024

4:46:41 PM

1,808.5000

148

XCSE

Genmab A/S

24/06/2024

4:46:41 PM

1,808.5000

23

XCSE

Genmab A/S

24/06/2024

4:46:41 PM

1,808.5000

23

XCSE

Genmab A/S

24/06/2024

4:46:42 PM

1,808.5000

23

XCSE

Genmab A/S

24/06/2024

4:48:03 PM

1,808.0000

40

XCSE

Genmab A/S

24/06/2024

4:48:15 PM

1,808.5000

24

AQEU

Genmab A/S

24/06/2024

4:48:15 PM

1,808.5000

32

XCSE

Genmab A/S

24/06/2024

4:48:16 PM

1,808.5000

1

XCSE

Genmab A/S

24/06/2024

4:48:31 PM

1,808.5000

33

AQEU

Genmab A/S

24/06/2024

4:48:37 PM

1,808.5000

34

XCSE

Genmab A/S

24/06/2024

4:48:44 PM

1,808.5000

17

CEUX

Genmab A/S

24/06/2024

4:48:44 PM

1,808.5000

17

CEUX

Genmab A/S

24/06/2024

4:49:03 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:03 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:49:11 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:49:11 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:11 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:49:11 PM

1,809.5000

8

AQEU

Genmab A/S

24/06/2024

4:49:20 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:49:20 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:20 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:49:28 PM

1,809.5000

16

AQEU

48


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

4:49:28 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:49:28 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:36 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:49:36 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:36 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:49:41 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:41 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:49:41 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:49:46 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:46 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:49:46 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:49:52 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:49:52 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:49:52 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:50:00 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:50:00 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:50:00 PM

1,809.5000

19

AQEU

Genmab A/S

24/06/2024

4:50:02 PM

1,808.5000

20

XCSE

Genmab A/S

24/06/2024

4:50:02 PM

1,808.5000

37

XCSE

Genmab A/S

24/06/2024

4:50:03 PM

1,808.5000

30

XCSE

Genmab A/S

24/06/2024

4:50:03 PM

1,808.5000

27

XCSE

Genmab A/S

24/06/2024

4:50:03 PM

1,808.5000

27

XCSE

Genmab A/S

24/06/2024

4:50:03 PM

1,808.5000

30

XCSE

Genmab A/S

24/06/2024

4:50:03 PM

1,808.5000

16

XCSE

Genmab A/S

24/06/2024

4:50:03 PM

1,808.5000

41

XCSE

Genmab A/S

24/06/2024

4:50:03 PM

1,808.5000

57

XCSE

Genmab A/S

24/06/2024

4:50:06 PM

1,808.5000

31

XCSE

Genmab A/S

24/06/2024

4:50:06 PM

1,808.5000

26

XCSE

Genmab A/S

24/06/2024

4:50:44 PM

1,809.0000

33

XCSE

Genmab A/S

24/06/2024

4:50:44 PM

1,809.0000

50

XCSE

Genmab A/S

24/06/2024

4:50:44 PM

1,809.0000

50

XCSE

Genmab A/S

24/06/2024

4:50:44 PM

1,809.0000

32

XCSE

Genmab A/S

24/06/2024

4:50:44 PM

1,809.0000

133

XCSE

Genmab A/S

24/06/2024

4:50:45 PM

1,809.0000

20

XCSE

Genmab A/S

24/06/2024

4:50:45 PM

1,809.0000

58

XCSE

Genmab A/S

24/06/2024

4:50:45 PM

1,809.0000

30

XCSE

Genmab A/S

24/06/2024

4:50:45 PM

1,809.0000

57

XCSE

Genmab A/S

24/06/2024

4:52:36 PM

1,809.5000

34

CEUX

Genmab A/S

24/06/2024

4:52:43 PM

1,809.5000

12

TQEX

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

28

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

17

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

11

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

24

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

22

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

29

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

21

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

10

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

25

XCSE

49


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

39

XCSE

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

18

AQEU

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

2

AQEU

Genmab A/S

24/06/2024

4:54:17 PM

1,809.5000

16

AQEU

Genmab A/S

24/06/2024

4:54:17 PM

1,809.0000

24

XCSE

Genmab A/S

24/06/2024

4:54:20 PM

1,809.7500

44

CEUX

Genmab A/S

24/06/2024

4:54:46 PM

1,809.5000

8

TQEX

Genmab A/S

24/06/2024

4:54:48 PM

1,809.5000

1

AQEU

Genmab A/S

24/06/2024

4:54:50 PM

1,810.0000

17

XCSE

Genmab A/S

24/06/2024

4:54:50 PM

1,810.0000

217

XCSE

Genmab A/S

24/06/2024

4:54:50 PM

1,809.5000

20

XCSE

Genmab A/S

24/06/2024

4:54:50 PM

1,809.5000

2

XCSE

Genmab A/S

24/06/2024

4:54:51 PM

1,809.5000

2

XCSE

Genmab A/S

24/06/2024

4:54:54 PM

1,809.5000

4

XCSE

Genmab A/S

24/06/2024

4:54:54 PM

1,809.5000

5

XCSE

Genmab A/S

24/06/2024

4:54:54 PM

1,809.5000

8

XCSE

Genmab A/S

24/06/2024

4:54:54 PM

1,809.5000

6

XCSE

Genmab A/S

25/06/2024

9:00:01 AM

1,793.5000

22

XCSE

Genmab A/S

25/06/2024

9:00:03 AM

1,793.5000

22

XCSE

Genmab A/S

25/06/2024

9:00:03 AM

1,793.5000

66

XCSE

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

18

XCSE

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

22

XCSE

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

18

XCSE

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

22

XCSE

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

17

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

20

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

17

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

20

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

17

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

20

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

9

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

20

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

18

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

2

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

2

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

2

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

2

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

50


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

5

TQEX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

42

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

27

CEUX

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

3

AQEU

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

50

XCSE

Genmab A/S

25/06/2024

9:00:36 AM

1,792.5000

29

XCSE

Genmab A/S

25/06/2024

9:01:10 AM

1,789.0000

44

XCSE

Genmab A/S

25/06/2024

9:01:10 AM

1,789.0000

38

XCSE

Genmab A/S

25/06/2024

9:01:10 AM

1,789.0000

14

XCSE

Genmab A/S

25/06/2024

9:03:14 AM

1,802.0000

41

XCSE

Genmab A/S

25/06/2024

9:03:14 AM

1,802.0000

67

XCSE

Genmab A/S

25/06/2024

9:03:14 AM

1,802.0000

69

XCSE

Genmab A/S

25/06/2024

9:03:14 AM

1,802.5000

37

XCSE

Genmab A/S

25/06/2024

9:03:43 AM

1,799.5000

34

XCSE

Genmab A/S

25/06/2024

9:03:43 AM

1,799.5000

11

XCSE

Genmab A/S

25/06/2024

9:03:43 AM

1,799.5000

11

XCSE

Genmab A/S

25/06/2024

9:05:03 AM

1,802.5000

68

XCSE

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

40

XCSE

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

35

XCSE

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

36

CEUX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

36

CEUX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

6

AQEU

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

37

AQEU

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

2

TQEX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

40

XCSE

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

49

XCSE

Genmab A/S

25/06/2024

9:07:29 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

9:07:31 AM

1,803.0000

13

AQEU

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

42

CEUX

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

41

CEUX

51


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

46

XCSE

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

45

XCSE

Genmab A/S

25/06/2024

9:07:51 AM

1,804.0000

18

XCSE

Genmab A/S

25/06/2024

9:08:13 AM

1,804.0000

4

XCSE

Genmab A/S

25/06/2024

9:08:13 AM

1,804.0000

27

XCSE

Genmab A/S

25/06/2024

9:08:13 AM

1,804.0000

4

XCSE

Genmab A/S

25/06/2024

9:08:13 AM

1,804.0000

9

XCSE

Genmab A/S

25/06/2024

9:08:13 AM

1,804.0000

22

XCSE

Genmab A/S

25/06/2024

9:08:13 AM

1,804.0000

31

XCSE

Genmab A/S

25/06/2024

9:08:13 AM

1,804.0000

30

XCSE

Genmab A/S

25/06/2024

9:08:30 AM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

21

CEUX

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

32

CEUX

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

46

CEUX

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

8

AQEU

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

7

AQEU

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

7

TQEX

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

8

TQEX

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

59

XCSE

Genmab A/S

25/06/2024

9:09:30 AM

1,802.0000

51

XCSE

Genmab A/S

25/06/2024

9:09:50 AM

1,801.0000

15

XCSE

Genmab A/S

25/06/2024

9:09:50 AM

1,801.0000

30

XCSE

Genmab A/S

25/06/2024

9:09:50 AM

1,801.0000

30

XCSE

Genmab A/S

25/06/2024

9:09:50 AM

1,801.0000

10

XCSE

Genmab A/S

25/06/2024

9:09:50 AM

1,801.0000

5

XCSE

Genmab A/S

25/06/2024

9:09:50 AM

1,801.0000

5

XCSE

Genmab A/S

25/06/2024

9:09:50 AM

1,801.0000

10

XCSE

Genmab A/S

25/06/2024

9:10:15 AM

1,800.0000

6

CEUX

Genmab A/S

25/06/2024

9:10:38 AM

1,800.5000

26

XCSE

Genmab A/S

25/06/2024

9:10:38 AM

1,800.5000

23

XCSE

Genmab A/S

25/06/2024

9:10:38 AM

1,800.5000

3

XCSE

Genmab A/S

25/06/2024

9:10:38 AM

1,800.5000

26

XCSE

Genmab A/S

25/06/2024

9:10:39 AM

1,800.5000

20

XCSE

Genmab A/S

25/06/2024

9:11:20 AM

1,801.0000

19

XCSE

Genmab A/S

25/06/2024

9:11:20 AM

1,801.0000

5

XCSE

Genmab A/S

25/06/2024

9:12:39 AM

1,803.0000

37

CEUX

Genmab A/S

25/06/2024

9:12:52 AM

1,803.0000

34

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

23

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

8

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

2

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

33

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

29

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

AQEU

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

AQEU

52


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

AQEU

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

10

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

8

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

8

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

2

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

8

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

37

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

47

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

31

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

4

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

9

CEUX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

5

AQEU

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

2

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,802.5000

9

TQEX

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

5

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

25

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

2

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

17

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

2

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

17

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

9

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

18

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

5

XCSE

Genmab A/S

25/06/2024

9:12:54 AM

1,801.5000

18

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,801.0000

18

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,801.0000

35

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,801.0000

48

CEUX

Genmab A/S

25/06/2024

9:14:22 AM

1,801.0000

7

AQEU

Genmab A/S

25/06/2024

9:14:22 AM

1,801.0000

7

TQEX

Genmab A/S

25/06/2024

9:14:22 AM

1,800.5000

5

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,800.5000

65

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,800.5000

11

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,800.0000

2

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,800.0000

46

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,800.0000

12

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,800.0000

36

XCSE

Genmab A/S

25/06/2024

9:14:22 AM

1,800.0000

14

XCSE

Genmab A/S

25/06/2024

9:15:28 AM

1,796.0000

40

XCSE

Genmab A/S

25/06/2024

9:15:28 AM

1,796.0000

44

XCSE

Genmab A/S

25/06/2024

9:15:28 AM

1,796.0000

41

CEUX

Genmab A/S

25/06/2024

9:15:28 AM

1,796.0000

12

AQEU

Genmab A/S

25/06/2024

9:17:25 AM

1,796.0000

33

CEUX

Genmab A/S

25/06/2024

9:17:25 AM

1,796.0000

27

CEUX

Genmab A/S

25/06/2024

9:18:03 AM

1,796.5000

60

XCSE

53


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:18:03 AM

1,796.5000

55

CEUX

Genmab A/S

25/06/2024

9:18:03 AM

1,796.5000

8

AQEU

Genmab A/S

25/06/2024

9:18:03 AM

1,796.5000

8

TQEX

Genmab A/S

25/06/2024

9:18:49 AM

1,796.5000

46

XCSE

Genmab A/S

25/06/2024

9:18:49 AM

1,796.5000

67

XCSE

Genmab A/S

25/06/2024

9:18:49 AM

1,796.5000

4

XCSE

Genmab A/S

25/06/2024

9:18:49 AM

1,796.5000

12

XCSE

Genmab A/S

25/06/2024

9:18:49 AM

1,795.5000

53

XCSE

Genmab A/S

25/06/2024

9:18:49 AM

1,795.5000

46

XCSE

Genmab A/S

25/06/2024

9:18:49 AM

1,795.5000

25

CEUX

Genmab A/S

25/06/2024

9:18:49 AM

1,795.5000

18

XCSE

Genmab A/S

25/06/2024

9:20:28 AM

1,799.0000

53

XCSE

Genmab A/S

25/06/2024

9:20:28 AM

1,799.0000

3

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

13

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

13

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

57

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

55

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

19

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

7

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

9:21:28 AM

1,799.0000

18

XCSE

Genmab A/S

25/06/2024

9:24:13 AM

1,800.0000

39

XCSE

Genmab A/S

25/06/2024

9:24:28 AM

1,799.0000

1

AQEU

Genmab A/S

25/06/2024

9:24:28 AM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

9:24:28 AM

1,799.0000

5

CEUX

Genmab A/S

25/06/2024

9:24:28 AM

1,799.0000

5

TQEX

Genmab A/S

25/06/2024

9:24:28 AM

1,799.0000

9

TQEX

Genmab A/S

25/06/2024

9:24:39 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:24:39 AM

1,800.0000

27

XCSE

Genmab A/S

25/06/2024

9:24:54 AM

1,800.0000

9

XCSE

Genmab A/S

25/06/2024

9:24:54 AM

1,800.0000

25

XCSE

Genmab A/S

25/06/2024

9:25:08 AM

1,800.0000

14

XCSE

Genmab A/S

25/06/2024

9:25:08 AM

1,800.0000

19

XCSE

Genmab A/S

25/06/2024

9:25:23 AM

1,800.0000

39

XCSE

Genmab A/S

25/06/2024

9:25:39 AM

1,800.0000

36

XCSE

Genmab A/S

25/06/2024

9:25:53 AM

1,800.0000

36

XCSE

Genmab A/S

25/06/2024

9:26:08 AM

1,800.0000

41

XCSE

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

5

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

19

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

39

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

10

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

10

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

4

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

10

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

3

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

3

AQEU

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

1

AQEU

54


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

1

AQEU

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

5

TQEX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

5

TQEX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

11

TQEX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

5

TQEX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

11

TQEX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

4

TQEX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

9

XCSE

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

30

XCSE

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

34

XCSE

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

9

XCSE

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

32

XCSE

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

20

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

5

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

12

CEUX

Genmab A/S

25/06/2024

9:26:17 AM

1,799.0000

4

CEUX

Genmab A/S

25/06/2024

9:28:27 AM

1,798.5000

8

AQEU

Genmab A/S

25/06/2024

9:28:27 AM

1,798.5000

60

CEUX

Genmab A/S

25/06/2024

9:28:27 AM

1,798.5000

9

TQEX

Genmab A/S

25/06/2024

9:28:27 AM

1,798.5000

67

XCSE

Genmab A/S

25/06/2024

9:28:27 AM

1,798.5000

1

CEUX

Genmab A/S

25/06/2024

9:28:27 AM

1,798.0000

49

XCSE

Genmab A/S

25/06/2024

9:30:18 AM

1,798.5000

55

XCSE

Genmab A/S

25/06/2024

9:30:18 AM

1,798.5000

15

XCSE

Genmab A/S

25/06/2024

9:30:27 AM

1,798.5000

30

XCSE

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

3

CEUX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

3

CEUX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:31:13 AM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

9:31:44 AM

1,799.5000

46

XCSE

Genmab A/S

25/06/2024

9:31:44 AM

1,799.5000

46

XCSE

Genmab A/S

25/06/2024

9:31:44 AM

1,799.5000

14

XCSE

Genmab A/S

25/06/2024

9:31:44 AM

1,799.5000

11

XCSE

Genmab A/S

25/06/2024

9:33:22 AM

1,800.5000

2

TQEX

Genmab A/S

25/06/2024

9:33:22 AM

1,800.5000

2

TQEX

55


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:33:22 AM

1,800.5000

4

XCSE

Genmab A/S

25/06/2024

9:33:22 AM

1,800.5000

28

XCSE

Genmab A/S

25/06/2024

9:33:37 AM

1,800.0000

11

XCSE

Genmab A/S

25/06/2024

9:33:37 AM

1,800.0000

28

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

20

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

22

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

20

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

62

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

56

CEUX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

47

CEUX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

53

CEUX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

9

TQEX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

9

TQEX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

1

TQEX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

9

TQEX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

9

TQEX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

9

TQEX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

16

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

6

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

4

XCSE

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

36

CEUX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

5

CEUX

Genmab A/S

25/06/2024

9:33:45 AM

1,800.0000

1

TQEX

Genmab A/S

25/06/2024

9:33:46 AM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

9:33:46 AM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

51

XCSE

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

14

XCSE

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

31

XCSE

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

46

CEUX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

40

CEUX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

7

AQEU

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

7

AQEU

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

7

AQEU

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

6

TQEX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

19

TQEX

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

9

AQEU

Genmab A/S

25/06/2024

9:36:10 AM

1,804.0000

14

TQEX

Genmab A/S

25/06/2024

9:36:21 AM

1,803.0000

17

CEUX

Genmab A/S

25/06/2024

9:36:21 AM

1,803.0000

3

CEUX

Genmab A/S

25/06/2024

9:36:21 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

9:36:21 AM

1,803.0000

20

XCSE

Genmab A/S

25/06/2024

9:36:30 AM

1,801.5000

9

CEUX

Genmab A/S

25/06/2024

9:37:45 AM

1,803.0000

10

XCSE

56


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:37:45 AM

1,803.0000

20

XCSE

Genmab A/S

25/06/2024

9:39:26 AM

1,803.5000

4

AQEU

Genmab A/S

25/06/2024

9:39:26 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:39:26 AM

1,803.5000

3

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

27

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

11

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

15

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

2

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

11

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

7

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

11

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

11

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

11

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

11

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

4

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

4

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

4

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

4

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

4

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

4

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

3

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

3

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

3

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

57


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

28

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

35

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

20

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

3

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

10

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

2

XCSE

Genmab A/S

25/06/2024

9:40:00 AM

1,803.0000

34

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.0000

9

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.0000

9

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

8

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.0000

9

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,803.5000

35

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

21

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

20

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

21

CEUX

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

3

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

2

AQEU

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

2

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

3

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

2

TQEX

Genmab A/S

25/06/2024

9:40:00 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

9:40:01 AM

1,802.5000

22

XCSE

Genmab A/S

25/06/2024

9:40:01 AM

1,802.5000

20

XCSE

Genmab A/S

25/06/2024

9:40:01 AM

1,802.5000

15

CEUX

Genmab A/S

25/06/2024

9:42:27 AM

1,801.0000

1

AQEU

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

16

XCSE

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

44

XCSE

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

28

XCSE

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

16

XCSE

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

42

XCSE

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

55

CEUX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

15

CEUX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

40

CEUX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

15

CEUX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

8

CEUX

58


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

7

AQEU

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

7

AQEU

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

1

AQEU

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

6

AQEU

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

7

AQEU

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

8

TQEX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

8

TQEX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

8

TQEX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

8

TQEX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

8

TQEX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

6

TQEX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

6

CEUX

Genmab A/S

25/06/2024

9:43:25 AM

1,801.0000

9

AQEU

Genmab A/S

25/06/2024

9:44:02 AM

1,800.0000

19

XCSE

Genmab A/S

25/06/2024

9:44:02 AM

1,800.0000

44

XCSE

Genmab A/S

25/06/2024

9:44:02 AM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

9:44:02 AM

1,800.0000

42

AQEU

Genmab A/S

25/06/2024

9:44:02 AM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

9:44:02 AM

1,800.0000

45

XCSE

Genmab A/S

25/06/2024

9:44:02 AM

1,800.0000

36

XCSE

Genmab A/S

25/06/2024

9:45:37 AM

1,800.0000

11

XCSE

Genmab A/S

25/06/2024

9:46:18 AM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

9:46:18 AM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

9:46:18 AM

1,800.5000

28

XCSE

Genmab A/S

25/06/2024

9:46:18 AM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

9:46:18 AM

1,800.5000

1

XCSE

Genmab A/S

25/06/2024

9:47:28 AM

1,800.0000

1

AQEU

Genmab A/S

25/06/2024

9:48:54 AM

1,800.0000

2

XCSE

Genmab A/S

25/06/2024

9:49:44 AM

1,800.5000

13

AQEU

Genmab A/S

25/06/2024

9:50:48 AM

1,800.5000

10

CEUX

Genmab A/S

25/06/2024

9:51:13 AM

1,805.0000

18

XCSE

Genmab A/S

25/06/2024

9:51:13 AM

1,805.0000

34

XCSE

Genmab A/S

25/06/2024

9:51:13 AM

1,805.0000

30

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

16

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

6

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

23

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

22

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

45

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

46

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

51

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

6

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

20

CEUX

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

9

AQEU

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

9

TQEX

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

5

TQEX

59


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

45

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

22

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

45

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

46

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

51

XCSE

Genmab A/S

25/06/2024

9:51:45 AM

1,805.0000

11

XCSE

Genmab A/S

25/06/2024

9:52:31 AM

1,804.0000

1

AQEU

Genmab A/S

25/06/2024

9:55:10 AM

1,805.5000

1

TQEX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

3

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

6

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

1

AQEU

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

1

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

2

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

CEUX

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

1

AQEU

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

1

AQEU

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

33

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

2

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

7

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

2

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

8

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

9:55:35 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

51

XCSE

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

12

XCSE

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

45

CEUX

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

21

CEUX

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

36

AQEU

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

5

AQEU

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

4

TQEX

60


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

3

TQEX

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

7

TQEX

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

36

CEUX

Genmab A/S

25/06/2024

9:56:10 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

9:56:10 AM

1,804.5000

4

XCSE

Genmab A/S

25/06/2024

9:56:10 AM

1,804.5000

3

XCSE

Genmab A/S

25/06/2024

9:56:10 AM

1,804.5000

39

XCSE

Genmab A/S

25/06/2024

9:56:10 AM

1,804.5000

10

XCSE

Genmab A/S

25/06/2024

9:57:26 AM

1,804.5000

1

AQEU

Genmab A/S

25/06/2024

9:57:27 AM

1,804.5000

1

AQEU

Genmab A/S

25/06/2024

9:57:27 AM

1,804.5000

2

AQEU

Genmab A/S

25/06/2024

9:58:25 AM

1,804.5000

1

CEUX

Genmab A/S

25/06/2024

9:58:25 AM

1,804.5000

6

CEUX

Genmab A/S

25/06/2024

9:58:25 AM

1,804.5000

4

AQEU

Genmab A/S

25/06/2024

9:58:46 AM

1,805.5000

30

XCSE

Genmab A/S

25/06/2024

9:59:00 AM

1,805.5000

25

AQEU

Genmab A/S

25/06/2024

9:59:00 AM

1,805.5000

2

AQEU

Genmab A/S

25/06/2024

9:59:00 AM

1,805.5000

2

AQEU

Genmab A/S

25/06/2024

9:59:00 AM

1,805.5000

2

TQEX

Genmab A/S

25/06/2024

9:59:00 AM

1,805.5000

2

TQEX

Genmab A/S

25/06/2024

9:59:00 AM

1,805.5000

5

TQEX

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

2

AQEU

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

2

AQEU

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

9

AQEU

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

3

TQEX

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

2

TQEX

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

2

TQEX

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

10

XCSE

Genmab A/S

25/06/2024

9:59:19 AM

1,805.5000

7

XCSE

Genmab A/S

25/06/2024

9:59:41 AM

1,805.5000

2

AQEU

Genmab A/S

25/06/2024

9:59:41 AM

1,805.5000

2

AQEU

Genmab A/S

25/06/2024

9:59:41 AM

1,805.5000

9

AQEU

Genmab A/S

25/06/2024

9:59:41 AM

1,805.5000

9

TQEX

Genmab A/S

25/06/2024

9:59:41 AM

1,805.5000

10

XCSE

Genmab A/S

25/06/2024

9:59:41 AM

1,805.5000

5

XCSE

Genmab A/S

25/06/2024

9:59:52 AM

1,804.5000

1

AQEU

Genmab A/S

25/06/2024

9:59:55 AM

1,805.0000

3

TQEX

Genmab A/S

25/06/2024

9:59:55 AM

1,805.0000

1

TQEX

Genmab A/S

25/06/2024

9:59:55 AM

1,805.0000

29

XCSE

Genmab A/S

25/06/2024

10:00:09 AM

1,804.5000

9

XCSE

Genmab A/S

25/06/2024

10:00:18 AM

1,805.5000

2

TQEX

Genmab A/S

25/06/2024

10:00:25 AM

1,805.5000

1

TQEX

Genmab A/S

25/06/2024

10:00:25 AM

1,805.5000

24

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

39

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

5

AQEU

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

35

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

35

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

15

CEUX

61


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

5

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

4

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

26

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

2

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

3

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

2

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

20

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

9

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

2

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

18

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

19

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

19

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

38

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

5

TQEX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

11

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

4

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

11

CEUX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

2

AQEU

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

2

AQEU

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

5

AQEU

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

5

AQEU

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

1

TQEX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

10:01:22 AM

1,805.0000

23

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,804.5000

22

XCSE

Genmab A/S

25/06/2024

10:01:22 AM

1,804.5000

1

XCSE

Genmab A/S

25/06/2024

10:01:35 AM

1,803.5000

100

CEUX

Genmab A/S

25/06/2024

10:01:35 AM

1,803.5000

12

AQEU

Genmab A/S

25/06/2024

10:01:35 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

10:01:35 AM

1,803.5000

16

TQEX

Genmab A/S

25/06/2024

10:01:35 AM

1,803.5000

111

XCSE

Genmab A/S

25/06/2024

10:05:12 AM

1,802.0000

1

AQEU

Genmab A/S

25/06/2024

10:06:26 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

2

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

35

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

140

CEUX

62


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

3

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

6

TQEX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

22

TQEX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

2

TQEX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

4

TQEX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

3

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

2

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

29

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

2

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

2

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

1

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

6

TQEX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

1

TQEX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

2

CEUX

Genmab A/S

25/06/2024

10:07:25 AM

1,805.5000

2

CEUX

Genmab A/S

25/06/2024

10:07:27 AM

1,805.0000

25

XCSE

Genmab A/S

25/06/2024

10:07:27 AM

1,805.5000

6

TQEX

Genmab A/S

25/06/2024

10:07:27 AM

1,805.5000

30

CEUX

Genmab A/S

25/06/2024

10:07:27 AM

1,805.5000

4

CEUX

Genmab A/S

25/06/2024

10:07:27 AM

1,805.5000

6

TQEX

Genmab A/S

25/06/2024

10:07:27 AM

1,805.5000

22

TQEX

Genmab A/S

25/06/2024

10:08:04 AM

1,809.0000

37

XCSE

Genmab A/S

25/06/2024

10:08:04 AM

1,809.0000

8

XCSE

Genmab A/S

25/06/2024

10:08:04 AM

1,809.0000

45

XCSE

Genmab A/S

25/06/2024

10:08:04 AM

1,809.0000

45

XCSE

Genmab A/S

25/06/2024

10:08:04 AM

1,809.0000

10

XCSE

Genmab A/S

25/06/2024

10:08:05 AM

1,808.5000

17

CEUX

Genmab A/S

25/06/2024

10:08:05 AM

1,808.5000

2

AQEU

Genmab A/S

25/06/2024

10:08:05 AM

1,808.5000

5

TQEX

Genmab A/S

25/06/2024

10:08:05 AM

1,808.5000

5

TQEX

Genmab A/S

25/06/2024

10:09:59 AM

1,808.0000

51

XCSE

Genmab A/S

25/06/2024

10:09:59 AM

1,808.0000

7

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

1

XCSE

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

4

XCSE

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

46

XCSE

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

51

XCSE

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

106

XCSE

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

38

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

7

AQEU

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

9

AQEU

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

9

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

36

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

9

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

45

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

45

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

7

AQEU

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

6

AQEU

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

3

CEUX

63


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

5

CEUX

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

38

XCSE

Genmab A/S

25/06/2024

10:10:47 AM

1,808.0000

14

XCSE

Genmab A/S

25/06/2024

10:10:48 AM

1,807.0000

2

AQEU

Genmab A/S

25/06/2024

10:10:48 AM

1,807.0000

3

AQEU

Genmab A/S

25/06/2024

10:10:48 AM

1,807.0000

2

AQEU

Genmab A/S

25/06/2024

10:10:48 AM

1,807.0000

1

TQEX

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

20

CEUX

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

22

CEUX

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

2

AQEU

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

3

AQEU

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

2

AQEU

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

3

AQEU

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

2

AQEU

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:11:04 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:11:05 AM

1,806.5000

20

XCSE

Genmab A/S

25/06/2024

10:11:05 AM

1,806.5000

23

XCSE

Genmab A/S

25/06/2024

10:11:05 AM

1,806.5000

3

TQEX

Genmab A/S

25/06/2024

10:11:05 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:11:05 AM

1,806.5000

2

TQEX

Genmab A/S

25/06/2024

10:11:05 AM

1,806.5000

20

CEUX

Genmab A/S

25/06/2024

10:11:05 AM

1,806.5000

16

CEUX

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

20

CEUX

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

20

CEUX

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

4

CEUX

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

5

TQEX

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

47

XCSE

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

47

XCSE

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

81

XCSE

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

5

XCSE

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

3

XCSE

Genmab A/S

25/06/2024

10:13:25 AM

1,807.5000

44

XCSE

Genmab A/S

25/06/2024

10:18:27 AM

1,806.0000

1

AQEU

Genmab A/S

25/06/2024

10:19:25 AM

1,806.5000

18

CEUX

Genmab A/S

25/06/2024

10:19:25 AM

1,806.5000

19

XCSE

Genmab A/S

25/06/2024

10:19:25 AM

1,806.5000

2

CEUX

Genmab A/S

25/06/2024

10:20:26 AM

1,806.5000

39

XCSE

Genmab A/S

25/06/2024

10:20:26 AM

1,806.5000

46

XCSE

Genmab A/S

25/06/2024

10:20:26 AM

1,806.5000

6

XCSE

Genmab A/S

25/06/2024

10:20:26 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:20:26 AM

1,806.5000

24

XCSE

Genmab A/S

25/06/2024

10:21:35 AM

1,807.0000

10

CEUX

Genmab A/S

25/06/2024

10:21:35 AM

1,807.0000

21

CEUX

Genmab A/S

25/06/2024

10:21:35 AM

1,807.0000

17

CEUX

Genmab A/S

25/06/2024

10:21:35 AM

1,807.0000

4

CEUX

64


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:21:35 AM

1,807.0000

14

CEUX

Genmab A/S

25/06/2024

10:21:35 AM

1,807.0000

27

CEUX

Genmab A/S

25/06/2024

10:21:35 AM

1,807.0000

16

CEUX

Genmab A/S

25/06/2024

10:21:47 AM

1,807.0000

12

CEUX

Genmab A/S

25/06/2024

10:21:47 AM

1,807.0000

25

CEUX

Genmab A/S

25/06/2024

10:21:49 AM

1,806.5000

12

XCSE

Genmab A/S

25/06/2024

10:21:49 AM

1,806.5000

12

CEUX

Genmab A/S

25/06/2024

10:22:16 AM

1,806.5000

1

CEUX

Genmab A/S

25/06/2024

10:22:16 AM

1,806.5000

7

CEUX

Genmab A/S

25/06/2024

10:22:16 AM

1,806.5000

2

CEUX

Genmab A/S

25/06/2024

10:22:26 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:22:26 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:22:26 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:22:26 AM

1,806.5000

3

TQEX

Genmab A/S

25/06/2024

10:22:26 AM

1,806.5000

1

AQEU

Genmab A/S

25/06/2024

10:22:35 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:22:35 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:22:36 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

35

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

9

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

3

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

7

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

3

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

9

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

65


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

9

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

8

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

9

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

9

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

3

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

9

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

4

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

AQEU

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

4

AQEU

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

6

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

4

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

AQEU

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

AQEU

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

10

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

1

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

7

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

TQEX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

38

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

30

XCSE

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

5

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

9

CEUX

Genmab A/S

25/06/2024

10:23:01 AM

1,806.5000

12

XCSE

Genmab A/S

25/06/2024

10:23:05 AM

1,805.5000

30

CEUX

Genmab A/S

25/06/2024

10:23:05 AM

1,805.5000

53

CEUX

Genmab A/S

25/06/2024

10:23:05 AM

1,805.5000

43

XCSE

Genmab A/S

25/06/2024

10:23:05 AM

1,805.5000

52

XCSE

Genmab A/S

25/06/2024

10:23:05 AM

1,805.5000

38

XCSE

66


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:23:05 AM

1,805.5000

40

XCSE

Genmab A/S

25/06/2024

10:27:51 AM

1,802.0000

21

XCSE

Genmab A/S

25/06/2024

10:27:51 AM

1,802.0000

18

XCSE

Genmab A/S

25/06/2024

10:27:51 AM

1,802.0000

21

XCSE

Genmab A/S

25/06/2024

10:27:51 AM

1,802.0000

18

XCSE

Genmab A/S

25/06/2024

10:27:51 AM

1,802.0000

20

XCSE

Genmab A/S

25/06/2024

10:27:51 AM

1,802.0000

18

XCSE

Genmab A/S

25/06/2024

10:27:51 AM

1,802.0000

1

XCSE

Genmab A/S

25/06/2024

10:31:27 AM

1,802.0000

1

AQEU

Genmab A/S

25/06/2024

10:31:34 AM

1,802.5000

9

CEUX

Genmab A/S

25/06/2024

10:31:34 AM

1,802.5000

15

CEUX

Genmab A/S

25/06/2024

10:33:14 AM

1,803.5000

9

TQEX

Genmab A/S

25/06/2024

10:33:14 AM

1,804.0000

18

CEUX

Genmab A/S

25/06/2024

10:33:14 AM

1,804.0000

11

CEUX

Genmab A/S

25/06/2024

10:33:14 AM

1,804.0000

7

CEUX

Genmab A/S

25/06/2024

10:33:14 AM

1,804.0000

10

CEUX

Genmab A/S

25/06/2024

10:33:14 AM

1,804.0000

4

CEUX

Genmab A/S

25/06/2024

10:33:14 AM

1,804.0000

9

CEUX

Genmab A/S

25/06/2024

10:33:15 AM

1,804.0000

36

CEUX

Genmab A/S

25/06/2024

10:33:15 AM

1,804.0000

5

CEUX

Genmab A/S

25/06/2024

10:33:23 AM

1,804.0000

49

XCSE

Genmab A/S

25/06/2024

10:33:23 AM

1,803.5000

17

CEUX

Genmab A/S

25/06/2024

10:33:23 AM

1,804.0000

49

XCSE

Genmab A/S

25/06/2024

10:33:23 AM

1,803.5000

37

XCSE

Genmab A/S

25/06/2024

10:33:23 AM

1,803.5000

12

XCSE

Genmab A/S

25/06/2024

10:33:23 AM

1,803.5000

15

XCSE

Genmab A/S

25/06/2024

10:33:23 AM

1,803.5000

12

XCSE

Genmab A/S

25/06/2024

10:33:23 AM

1,804.0000

16

XCSE

Genmab A/S

25/06/2024

10:34:41 AM

1,803.5000

10

CEUX

Genmab A/S

25/06/2024

10:34:42 AM

1,804.0000

9

AQEU

Genmab A/S

25/06/2024

10:34:42 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

10:34:42 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

10:34:42 AM

1,804.0000

9

TQEX

Genmab A/S

25/06/2024

10:34:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

10:34:55 AM

1,804.0000

9

AQEU

Genmab A/S

25/06/2024

10:34:55 AM

1,804.0000

1

TQEX

Genmab A/S

25/06/2024

10:35:07 AM

1,804.0000

41

TQEX

Genmab A/S

25/06/2024

10:35:31 AM

1,803.5000

14

CEUX

Genmab A/S

25/06/2024

10:35:31 AM

1,803.5000

8

CEUX

Genmab A/S

25/06/2024

10:35:42 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:35:42 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:35:42 AM

1,804.0000

11

TQEX

Genmab A/S

25/06/2024

10:35:42 AM

1,804.0000

24

TQEX

Genmab A/S

25/06/2024

10:36:08 AM

1,804.0000

37

TQEX

Genmab A/S

25/06/2024

10:36:27 AM

1,803.5000

32

CEUX

Genmab A/S

25/06/2024

10:36:27 AM

1,803.5000

3

CEUX

Genmab A/S

25/06/2024

10:36:40 AM

1,803.5000

3

CEUX

Genmab A/S

25/06/2024

10:36:41 AM

1,804.0000

7

TQEX

67


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:36:50 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:36:50 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:37:01 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:37:01 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:37:08 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:37:08 AM

1,804.0000

2

TQEX

Genmab A/S

25/06/2024

10:37:08 AM

1,804.0000

9

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

6

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

8

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

1

AQEU

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

4

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

1

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

13

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

9

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

5

TQEX

68


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

14

CEUX

Genmab A/S

25/06/2024

10:37:18 AM

1,802.5000

30

XCSE

Genmab A/S

25/06/2024

10:37:18 AM

1,803.0000

13

XCSE

Genmab A/S

25/06/2024

10:41:27 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

10:41:27 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

10:42:27 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

10:42:28 AM

1,803.5000

12

XCSE

Genmab A/S

25/06/2024

10:42:28 AM

1,803.5000

25

XCSE

Genmab A/S

25/06/2024

10:42:28 AM

1,803.5000

13

CEUX

Genmab A/S

25/06/2024

10:42:28 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

10:42:28 AM

1,803.5000

13

CEUX

Genmab A/S

25/06/2024

10:43:53 AM

1,804.0000

22

XCSE

Genmab A/S

25/06/2024

10:43:56 AM

1,804.0000

9

CEUX

Genmab A/S

25/06/2024

10:43:56 AM

1,804.0000

11

CEUX

Genmab A/S

25/06/2024

10:43:57 AM

1,804.0000

22

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

14

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

8

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

48

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

13

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

22

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

1

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

33

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

47

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

14

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

20

CEUX

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

50

CEUX

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

6

CEUX

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

8

CEUX

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

11

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

48

CEUX

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

37

CEUX

Genmab A/S

25/06/2024

10:44:05 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

10:44:05 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

10:44:05 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

10:44:05 AM

1,803.5000

4

TQEX

Genmab A/S

25/06/2024

10:44:05 AM

1,803.5000

5

CEUX

Genmab A/S

25/06/2024

10:44:05 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

10:44:05 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

30

XCSE

Genmab A/S

25/06/2024

10:44:05 AM

1,804.0000

11

XCSE

Genmab A/S

25/06/2024

10:44:28 AM

1,802.5000

1

AQEU

Genmab A/S

25/06/2024

10:45:10 AM

1,802.5000

47

XCSE

Genmab A/S

25/06/2024

10:45:10 AM

1,802.5000

17

XCSE

Genmab A/S

25/06/2024

10:45:10 AM

1,802.5000

30

XCSE

Genmab A/S

25/06/2024

10:45:10 AM

1,802.5000

6

XCSE

Genmab A/S

25/06/2024

10:45:10 AM

1,802.5000

30

XCSE

Genmab A/S

25/06/2024

10:45:10 AM

1,802.5000

43

CEUX

Genmab A/S

25/06/2024

10:45:10 AM

1,802.5000

7

TQEX

69


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:47:53 AM

1,802.5000

3

CEUX

Genmab A/S

25/06/2024

10:47:53 AM

1,802.5000

5

AQEU

Genmab A/S

25/06/2024

10:47:53 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

10:49:05 AM

1,804.0000

34

TQEX

Genmab A/S

25/06/2024

10:49:26 AM

1,803.5000

66

CEUX

Genmab A/S

25/06/2024

10:49:26 AM

1,803.5000

10

CEUX

Genmab A/S

25/06/2024

10:49:26 AM

1,803.5000

11

TQEX

Genmab A/S

25/06/2024

10:49:26 AM

1,803.5000

1

CEUX

Genmab A/S

25/06/2024

10:49:26 AM

1,803.5000

73

XCSE

Genmab A/S

25/06/2024

10:50:58 AM

1,803.5000

16

CEUX

Genmab A/S

25/06/2024

10:51:04 AM

1,803.5000

36

TQEX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

36

CEUX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

36

CEUX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

72

CEUX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

7

AQEU

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

3

AQEU

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

7

AQEU

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

9

TQEX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

2

TQEX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

9

TQEX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

19

XCSE

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

60

XCSE

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

17

XCSE

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

62

XCSE

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

35

XCSE

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

7

CEUX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

2

TQEX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

2

CEUX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

2

CEUX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

2

CEUX

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

38

XCSE

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

5

XCSE

Genmab A/S

25/06/2024

10:51:14 AM

1,803.0000

24

CEUX

Genmab A/S

25/06/2024

10:52:01 AM

1,802.0000

33

XCSE

Genmab A/S

25/06/2024

10:52:01 AM

1,802.0000

21

XCSE

Genmab A/S

25/06/2024

10:52:01 AM

1,802.0000

16

XCSE

Genmab A/S

25/06/2024

10:52:01 AM

1,802.0000

2

CEUX

Genmab A/S

25/06/2024

10:54:11 AM

1,802.0000

10

XCSE

Genmab A/S

25/06/2024

10:54:11 AM

1,802.0000

35

XCSE

Genmab A/S

25/06/2024

10:54:11 AM

1,802.0000

10

CEUX

Genmab A/S

25/06/2024

10:54:33 AM

1,801.5000

2

AQEU

Genmab A/S

25/06/2024

10:54:33 AM

1,801.5000

5

TQEX

Genmab A/S

25/06/2024

10:54:33 AM

1,801.5000

16

XCSE

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

XCSE

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

122

XCSE

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

70


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

16

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

12

CEUX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

2

AQEU

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

5

TQEX

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

12

XCSE

Genmab A/S

25/06/2024

10:54:59 AM

1,801.5000

39

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.5000

89

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

19

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

2

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

29

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

2

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

11

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.5000

13

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.5000

10

TQEX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.5000

4

TQEX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.5000

15

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.5000

84

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

19

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

4

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

19

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

5

TQEX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

4

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

4

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

8

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

15

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

11

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

5

TQEX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

3

TQEX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

3

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

1

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

2

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

1

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

12

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

3

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

7

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

2

AQEU

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

7

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

4

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

5

TQEX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

2

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

8

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

35

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

2

CEUX

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

1

CEUX

71


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

30

XCSE

Genmab A/S

25/06/2024

10:56:15 AM

1,801.0000

6

XCSE

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

18

XCSE

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

18

XCSE

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

18

CEUX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

18

CEUX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

14

CEUX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

5

TQEX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

5

TQEX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

18

CEUX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

3

CEUX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

36

CEUX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

2

AQEU

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

5

TQEX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

18

XCSE

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

18

XCSE

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

5

XCSE

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

5

CEUX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

2

TQEX

Genmab A/S

25/06/2024

10:59:13 AM

1,800.5000

30

XCSE

Genmab A/S

25/06/2024

11:07:23 AM

1,799.5000

23

XCSE

Genmab A/S

25/06/2024

11:07:23 AM

1,799.5000

19

XCSE

Genmab A/S

25/06/2024

11:07:25 AM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

22

CEUX

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

9

CEUX

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

9

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

8

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

7

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

16

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

1

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

1

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

1

AQEU

72


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

37

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

21

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

21

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

59

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

21

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

36

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

21

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

21

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

21

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

16

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

38

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

30

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

30

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

13

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

7

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

16

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

32

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

16

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

22

CEUX

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

15

CEUX

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

41

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.5000

17

AQEU

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

5

TQEX

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

3

XCSE

Genmab A/S

25/06/2024

11:08:02 AM

1,798.5000

10

CEUX

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

18

CEUX

Genmab A/S

25/06/2024

11:08:02 AM

1,799.0000

13

CEUX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

49

XCSE

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

45

CEUX

73


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

3

CEUX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

7

AQEU

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

6

TQEX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

6

TQEX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

15

TQEX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

6

TQEX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

13

TQEX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

36

CEUX

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

6

XCSE

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

13

XCSE

Genmab A/S

25/06/2024

11:14:12 AM

1,798.0000

1

CEUX

Genmab A/S

25/06/2024

11:17:59 AM

1,798.5000

10

XCSE

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

15

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

13

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

15

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

13

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

15

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

13

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

11

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

15

XCSE

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

11

XCSE

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

15

CEUX

Genmab A/S

25/06/2024

11:20:24 AM

1,799.5000

9

CEUX

Genmab A/S

25/06/2024

11:20:25 AM

1,800.0000

1

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

46

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

51

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

66

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

2

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

15

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

31

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

51

XCSE

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

31

CEUX

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

15

CEUX

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

35

CEUX

Genmab A/S

25/06/2024

11:21:38 AM

1,800.5000

5

CEUX

Genmab A/S

25/06/2024

11:25:48 AM

1,804.0000

9

CEUX

Genmab A/S

25/06/2024

11:25:48 AM

1,804.0000

17

XCSE

Genmab A/S

25/06/2024

11:25:48 AM

1,804.0000

30

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

36

CEUX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

15

CEUX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

5

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

5

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

74


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

10

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

30

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

6

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

14

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

6

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

35

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

10

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

19

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

1

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

1

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

14

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

15

CEUX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

9

CEUX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

5

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

9

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

20

TQEX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

7

TQEX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

6

TQEX

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

3

AQEU

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

14

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

6

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

14

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

6

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

30

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

30

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

30

XCSE

Genmab A/S

25/06/2024

11:25:55 AM

1,804.0000

1

CEUX

Genmab A/S

25/06/2024

11:26:47 AM

1,804.0000

38

XCSE

Genmab A/S

25/06/2024

11:27:07 AM

1,803.0000

6

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

9

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

9

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

9

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

6

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

9

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

9

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

6

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

3

CEUX

75


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

1

AQEU

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

16

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

15

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

8

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

8

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

38

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

8

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

19

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

14

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

4

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

19

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

17

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

14

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

2

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

2

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

17

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

5

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

13

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

19

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

5

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

2

AQEU

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

2

AQEU

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

2

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

4

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

2

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

10

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

5

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,803.0000

23

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

8

CEUX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

2

AQEU

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

5

TQEX

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

1

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

17

XCSE

Genmab A/S

25/06/2024

11:27:31 AM

1,802.5000

45

XCSE

76


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

6

CEUX

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

11

CEUX

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

5

TQEX

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

18

XCSE

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

5

TQEX

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

11

CEUX

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

2

CEUX

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

18

XCSE

Genmab A/S

25/06/2024

11:31:01 AM

1,804.0000

4

CEUX

Genmab A/S

25/06/2024

11:32:56 AM

1,804.0000

3

AQEU

Genmab A/S

25/06/2024

11:32:56 AM

1,804.0000

3

AQEU

Genmab A/S

25/06/2024

11:32:56 AM

1,804.0000

5

TQEX

Genmab A/S

25/06/2024

11:32:56 AM

1,804.0000

16

XCSE

Genmab A/S

25/06/2024

11:32:56 AM

1,804.0000

27

XCSE

Genmab A/S

25/06/2024

11:32:56 AM

1,804.0000

16

XCSE

Genmab A/S

25/06/2024

11:32:56 AM

1,804.0000

11

XCSE

Genmab A/S

25/06/2024

11:34:27 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

11:34:27 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

11:35:25 AM

1,803.5000

2

AQEU

Genmab A/S

25/06/2024

11:35:25 AM

1,803.5000

22

CEUX

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

11

CEUX

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

5

TQEX

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

10

XCSE

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

10

XCSE

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

22

XCSE

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

10

XCSE

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

10

XCSE

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

1

XCSE

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

11

CEUX

Genmab A/S

25/06/2024

11:36:02 AM

1,804.0000

5

TQEX

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

8

CEUX

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

3

CEUX

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

5

CEUX

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

6

CEUX

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

1

AQEU

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

3

XCSE

Genmab A/S

25/06/2024

11:38:06 AM

1,803.5000

5

XCSE

Genmab A/S

25/06/2024

11:40:17 AM

1,803.5000

87

XCSE

Genmab A/S

25/06/2024

11:40:17 AM

1,803.5000

5

XCSE

Genmab A/S

25/06/2024

11:41:13 AM

1,803.5000

13

CEUX

Genmab A/S

25/06/2024

11:41:13 AM

1,803.5000

6

AQEU

Genmab A/S

25/06/2024

11:41:13 AM

1,803.5000

5

TQEX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

10

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

6

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

8

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

12

CEUX

77


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

10

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

18

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

50

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

20

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

28

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

46

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

18

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

116

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

46

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

10

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

50

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

50

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

4

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

5

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

4

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

5

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

4

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

4

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

20

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

22

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

4

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

42

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

5

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

1

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

5

CEUX

Genmab A/S

25/06/2024

11:43:39 AM

1,804.0000

5

CEUX

Genmab A/S

25/06/2024

11:43:40 AM

1,804.0000

20

CEUX

Genmab A/S

25/06/2024

11:43:47 AM

1,803.5000

18

XCSE

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

35

CEUX

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

5

AQEU

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

4

TQEX

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

2

TQEX

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

2

TQEX

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

37

XCSE

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

1

XCSE

Genmab A/S

25/06/2024

11:44:14 AM

1,803.5000

8

XCSE

Genmab A/S

25/06/2024

11:46:39 AM

1,803.0000

9

CEUX

Genmab A/S

25/06/2024

11:46:39 AM

1,803.0000

1

AQEU

Genmab A/S

25/06/2024

11:46:39 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

11:46:39 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

11:46:39 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

11:46:39 AM

1,803.0000

9

XCSE

Genmab A/S

25/06/2024

11:48:23 AM

1,803.0000

1

AQEU

Genmab A/S

25/06/2024

11:48:23 AM

1,803.0000

5

TQEX

Genmab A/S

25/06/2024

11:48:51 AM

1,804.0000

3

AQEU

Genmab A/S

25/06/2024

11:48:52 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:48:52 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:55 AM

1,804.0000

2

AQEU

78


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:49:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:55 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:56 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:56 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:56 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:56 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:57 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:49:57 AM

1,804.0000

2

AQEU

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

40

CEUX

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

4

CEUX

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

7

AQEU

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

7

AQEU

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

7

AQEU

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

7

TQEX

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

50

XCSE

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

6

XCSE

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

56

XCSE

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

8

CEUX

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

7

AQEU

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

13

AQEU

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

7

TQEX

Genmab A/S

25/06/2024

11:50:07 AM

1,803.5000

20

TQEX

Genmab A/S

25/06/2024

11:51:28 AM

1,803.5000

19

CEUX

Genmab A/S

25/06/2024

11:51:28 AM

1,803.5000

11

CEUX

Genmab A/S

25/06/2024

11:52:11 AM

1,805.0000

20

XCSE

Genmab A/S

25/06/2024

11:52:11 AM

1,805.0000

28

XCSE

Genmab A/S

25/06/2024

11:52:11 AM

1,805.0000

20

XCSE

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

34

XCSE

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

48

XCSE

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

55

XCSE

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

44

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

44

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

6

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

44

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

10

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

4

AQEU

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

4

AQEU

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

8

TQEX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

4

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

40

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

14

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

44

CEUX

79


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

44

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

10

CEUX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

46

XCSE

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

2

XCSE

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

7

XCSE

Genmab A/S

25/06/2024

11:53:07 AM

1,805.0000

3

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

30

CEUX

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

30

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

8

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

50

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

48

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

7

AQEU

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

2

CEUX

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

6

TQEX

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

3

TQEX

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

48

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

7

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

3

AQEU

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

30

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

105

XCSE

Genmab A/S

25/06/2024

11:53:08 AM

1,805.0000

28

XCSE

Genmab A/S

25/06/2024

11:59:53 AM

1,802.0000

11

AQEU

Genmab A/S

25/06/2024

11:59:53 AM

1,802.0000

1

AQEU

Genmab A/S

25/06/2024

11:59:53 AM

1,802.0000

11

TQEX

Genmab A/S

25/06/2024

11:59:53 AM

1,802.0000

5

TQEX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

75

CEUX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

11

CEUX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

11

CEUX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

11

CEUX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

3

CEUX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

10

CEUX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

5

TQEX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

5

TQEX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

62

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

21

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

10

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

51

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

39

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

5

TQEX

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

2

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

35

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

16

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

16

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

35

XCSE

80


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

27

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

3

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

7

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

16

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

11

XCSE

Genmab A/S

25/06/2024

12:03:25 PM

1,802.0000

10

XCSE

Genmab A/S

25/06/2024

12:04:34 PM

1,801.0000

79

XCSE

Genmab A/S

25/06/2024

12:04:34 PM

1,801.0000

9

TQEX

Genmab A/S

25/06/2024

12:04:34 PM

1,801.0000

72

CEUX

Genmab A/S

25/06/2024

12:04:34 PM

1,801.0000

10

AQEU

Genmab A/S

25/06/2024

12:04:34 PM

1,801.0000

2

TQEX

Genmab A/S

25/06/2024

12:04:34 PM

1,800.5000

44

XCSE

Genmab A/S

25/06/2024

12:04:34 PM

1,800.5000

131

XCSE

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

24

XCSE

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

18

XCSE

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

24

XCSE

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

42

XCSE

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

36

CEUX

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

5

CEUX

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

16

CEUX

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

9

AQEU

Genmab A/S

25/06/2024

12:05:52 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

12:10:49 PM

1,799.0000

83

CEUX

Genmab A/S

25/06/2024

12:10:49 PM

1,799.0000

12

AQEU

Genmab A/S

25/06/2024

12:10:49 PM

1,799.0000

13

TQEX

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

18

XCSE

Genmab A/S

25/06/2024

12:10:49 PM

1,799.0000

93

XCSE

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

18

CEUX

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

18

CEUX

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

14

CEUX

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

2

AQEU

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

42

AQEU

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

5

TQEX

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

5

TQEX

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

16

XCSE

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

2

XCSE

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

16

XCSE

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

3

XCSE

Genmab A/S

25/06/2024

12:10:49 PM

1,798.5000

36

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

XCSE

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

47

XCSE

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

1

AQEU

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

5

TQEX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

8

CEUX

81


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

8

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

5

CEUX

Genmab A/S

25/06/2024

12:17:05 PM

1,797.5000

5

TQEX

Genmab A/S

25/06/2024

12:18:40 PM

1,797.5000

61

XCSE

Genmab A/S

25/06/2024

12:18:40 PM

1,797.5000

15

XCSE

Genmab A/S

25/06/2024

12:18:40 PM

1,797.5000

35

CEUX

Genmab A/S

25/06/2024

12:18:40 PM

1,797.5000

34

CEUX

Genmab A/S

25/06/2024

12:18:40 PM

1,797.5000

5

AQEU

Genmab A/S

25/06/2024

12:18:40 PM

1,797.5000

11

TQEX

Genmab A/S

25/06/2024

12:18:40 PM

1,797.5000

5

AQEU

Genmab A/S

25/06/2024

12:19:21 PM

1,797.0000

27

XCSE

Genmab A/S

25/06/2024

12:19:21 PM

1,797.0000

13

XCSE

Genmab A/S

25/06/2024

12:19:21 PM

1,797.0000

20

XCSE

Genmab A/S

25/06/2024

12:19:21 PM

1,797.0000

23

XCSE

Genmab A/S

25/06/2024

12:19:21 PM

1,797.0000

7

XCSE

Genmab A/S

25/06/2024

12:19:21 PM

1,797.0000

30

XCSE

Genmab A/S

25/06/2024

12:19:21 PM

1,797.0000

49

XCSE

Genmab A/S

25/06/2024

12:22:07 PM

1,796.5000

69

CEUX

Genmab A/S

25/06/2024

12:22:07 PM

1,796.5000

10

AQEU

Genmab A/S

25/06/2024

12:22:07 PM

1,796.5000

11

TQEX

Genmab A/S

25/06/2024

12:22:07 PM

1,796.5000

26

XCSE

Genmab A/S

25/06/2024

12:22:07 PM

1,796.5000

50

XCSE

Genmab A/S

25/06/2024

12:26:14 PM

1,796.0000

38

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

72

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

28

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

24

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

49

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

52

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

21

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

52

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

21

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

24

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

57

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

57

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

2

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

4

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

34

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

51

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

18

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

35

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

57

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.5000

19

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

4

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

7

CEUX

82


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

5

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

7

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

4

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

11

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

6

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

36

CEUX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

4

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

38

XCSE

Genmab A/S

25/06/2024

12:27:34 PM

1,796.0000

2

XCSE

Genmab A/S

25/06/2024

12:36:05 PM

1,796.0000

36

CEUX

Genmab A/S

25/06/2024

12:36:05 PM

1,796.0000

2

CEUX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

14

CEUX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

9

CEUX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

2

TQEX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

2

TQEX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

4

CEUX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

4

CEUX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

9

CEUX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

2

TQEX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

2

TQEX

Genmab A/S

25/06/2024

12:36:51 PM

1,796.5000

9

TQEX

Genmab A/S

25/06/2024

12:37:09 PM

1,796.5000

12

CEUX

Genmab A/S

25/06/2024

12:37:09 PM

1,796.5000

9

CEUX

Genmab A/S

25/06/2024

12:37:09 PM

1,796.5000

4

CEUX

Genmab A/S

25/06/2024

12:37:09 PM

1,796.5000

5

CEUX

Genmab A/S

25/06/2024

12:37:09 PM

1,796.5000

6

TQEX

Genmab A/S

25/06/2024

12:37:33 PM

1,796.5000

36

CEUX

Genmab A/S

25/06/2024

12:37:33 PM

1,796.5000

3

CEUX

Genmab A/S

25/06/2024

12:38:13 PM

1,796.5000

8

CEUX

Genmab A/S

25/06/2024

12:38:13 PM

1,796.5000

9

CEUX

Genmab A/S

25/06/2024

12:38:13 PM

1,796.5000

9

TQEX

Genmab A/S

25/06/2024

12:38:13 PM

1,796.5000

12

XCSE

Genmab A/S

25/06/2024

12:38:28 PM

1,796.5000

5

CEUX

Genmab A/S

25/06/2024

12:38:28 PM

1,796.5000

9

CEUX

Genmab A/S

25/06/2024

12:38:28 PM

1,796.5000

9

CEUX

Genmab A/S

25/06/2024

12:38:28 PM

1,796.5000

2

TQEX

Genmab A/S

25/06/2024

12:38:28 PM

1,796.5000

2

TQEX

Genmab A/S

25/06/2024

12:38:28 PM

1,796.5000

9

XCSE

Genmab A/S

25/06/2024

12:39:11 PM

1,796.5000

7

XCSE

Genmab A/S

25/06/2024

12:39:26 PM

1,797.0000

9

CEUX

Genmab A/S

25/06/2024

12:39:26 PM

1,797.0000

9

CEUX

Genmab A/S

25/06/2024

12:40:38 PM

1,797.0000

44

XCSE

Genmab A/S

25/06/2024

12:40:38 PM

1,797.0000

44

XCSE

Genmab A/S

25/06/2024

12:40:38 PM

1,797.0000

17

XCSE

Genmab A/S

25/06/2024

12:40:39 PM

1,797.0000

17

CEUX

Genmab A/S

25/06/2024

12:40:39 PM

1,797.0000

20

AQEU

83


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

12:40:52 PM

1,797.0000

38

XCSE

Genmab A/S

25/06/2024

12:41:02 PM

1,796.5000

1

XCSE

Genmab A/S

25/06/2024

12:41:02 PM

1,796.5000

31

XCSE

Genmab A/S

25/06/2024

12:41:02 PM

1,796.5000

72

XCSE

Genmab A/S

25/06/2024

12:41:02 PM

1,796.5000

65

CEUX

Genmab A/S

25/06/2024

12:41:02 PM

1,796.5000

10

TQEX

Genmab A/S

25/06/2024

12:43:06 PM

1,797.0000

49

CEUX

Genmab A/S

25/06/2024

12:43:06 PM

1,797.0000

23

CEUX

Genmab A/S

25/06/2024

12:43:06 PM

1,797.0000

10

AQEU

Genmab A/S

25/06/2024

12:43:06 PM

1,797.0000

80

XCSE

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

13

XCSE

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

12

CEUX

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

12

CEUX

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

12

CEUX

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

2

AQEU

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

2

AQEU

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

13

XCSE

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

5

XCSE

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

13

XCSE

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

13

XCSE

Genmab A/S

25/06/2024

12:44:36 PM

1,798.5000

13

XCSE

Genmab A/S

25/06/2024

12:46:48 PM

1,799.0000

34

CEUX

Genmab A/S

25/06/2024

12:47:13 PM

1,799.0000

39

CEUX

Genmab A/S

25/06/2024

12:47:38 PM

1,799.0000

35

CEUX

Genmab A/S

25/06/2024

12:48:00 PM

1,799.0000

35

CEUX

Genmab A/S

25/06/2024

12:48:58 PM

1,798.5000

5

CEUX

Genmab A/S

25/06/2024

12:48:58 PM

1,799.0000

34

CEUX

Genmab A/S

25/06/2024

12:52:30 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

12:52:30 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

12:52:30 PM

1,799.5000

4

CEUX

Genmab A/S

25/06/2024

12:52:30 PM

1,799.5000

4

CEUX

Genmab A/S

25/06/2024

12:52:30 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

12:52:30 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

39

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

1

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

40

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

32

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

8

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

2

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

4

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

4

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

44

XCSE

84


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

73

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

3

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

14

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

25

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

2

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

49

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

24

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

44

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

46

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

12

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

7

XCSE

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

4

TQEX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

22

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

18

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

CEUX

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

2

AQEU

Genmab A/S

25/06/2024

12:53:19 PM

1,799.0000

4

TQEX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

55

XCSE

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

16

XCSE

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

49

CEUX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

9

CEUX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

7

AQEU

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

8

TQEX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

55

XCSE

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

49

CEUX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

8

TQEX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

2

CEUX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

9

CEUX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

7

CEUX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

3

AQEU

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

4

AQEU

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

7

AQEU

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

6

TQEX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

2

TQEX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

2

TQEX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

36

CEUX

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

8

AQEU

Genmab A/S

25/06/2024

12:53:31 PM

1,798.5000

9

TQEX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

82

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

45

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

7

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

75

XCSE

85


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

45

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

1

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

45

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

75

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

45

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

75

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

40

XCSE

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

40

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

40

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

36

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

40

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

36

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

40

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

36

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

40

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

36

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

21

CEUX

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

6

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

3

AQEU

Genmab A/S

25/06/2024

1:02:32 PM

1,800.5000

37

XCSE

Genmab A/S

25/06/2024

1:12:39 PM

1,799.0000

1

CEUX

Genmab A/S

25/06/2024

1:14:38 PM

1,799.0000

22

XCSE

Genmab A/S

25/06/2024

1:14:38 PM

1,799.0000

49

XCSE

Genmab A/S

25/06/2024

1:14:38 PM

1,799.0000

21

CEUX

Genmab A/S

25/06/2024

1:16:37 PM

1,800.0000

35

CEUX

Genmab A/S

25/06/2024

1:16:37 PM

1,800.0000

10

CEUX

Genmab A/S

25/06/2024

1:16:37 PM

1,800.0000

11

CEUX

Genmab A/S

25/06/2024

1:16:37 PM

1,800.0000

22

CEUX

Genmab A/S

25/06/2024

1:16:37 PM

1,800.0000

19

CEUX

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

26

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

75

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

5

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

74

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

26

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

177

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

61

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

70

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

30

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

80

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

74

XCSE

86


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

49

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

72

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

4

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

46

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

74

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

83

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

30

XCSE

Genmab A/S

25/06/2024

1:19:45 PM

1,800.5000

16

XCSE

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

28

CEUX

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

28

CEUX

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

6

CEUX

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

5

TQEX

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

15

TQEX

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

30

XCSE

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

39

XCSE

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

20

CEUX

Genmab A/S

25/06/2024

1:24:14 PM

1,799.0000

6

CEUX

Genmab A/S

25/06/2024

1:25:45 PM

1,798.5000

18

CEUX

Genmab A/S

25/06/2024

1:25:45 PM

1,798.5000

19

XCSE

Genmab A/S

25/06/2024

1:30:31 PM

1,799.5000

10

CEUX

Genmab A/S

25/06/2024

1:30:31 PM

1,799.5000

1

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

29

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

66

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

35

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

3

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

24

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

27

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

27

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

20

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

23

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

4

AQEU

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

15

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

2

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

3

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

16

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

4

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

27

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

17

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

3

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

2

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

29

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

27

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

4

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

45

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

1

XCSE

87


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

30

XCSE

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

4

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

4

CEUX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

2

TQEX

Genmab A/S

25/06/2024

1:31:16 PM

1,799.5000

2

TQEX

Genmab A/S

25/06/2024

1:36:56 PM

1,799.0000

36

CEUX

Genmab A/S

25/06/2024

1:37:18 PM

1,799.0000

5

CEUX

Genmab A/S

25/06/2024

1:37:18 PM

1,799.0000

2

AQEU

Genmab A/S

25/06/2024

1:37:18 PM

1,799.0000

2

AQEU

Genmab A/S

25/06/2024

1:37:18 PM

1,799.0000

2

TQEX

Genmab A/S

25/06/2024

1:37:18 PM

1,799.0000

2

TQEX

Genmab A/S

25/06/2024

1:37:18 PM

1,799.0000

21

XCSE

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

99

CEUX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

37

CEUX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

37

CEUX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

13

CEUX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

37

CEUX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

14

AQEU

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

38

TQEX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

29

TQEX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

1

TQEX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

16

TQEX

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

70

XCSE

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

41

XCSE

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

9

XCSE

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

33

XCSE

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

50

XCSE

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

6

AQEU

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

42

XCSE

Genmab A/S

25/06/2024

1:40:15 PM

1,799.0000

42

XCSE

Genmab A/S

25/06/2024

1:44:43 PM

1,799.0000

2

TQEX

Genmab A/S

25/06/2024

1:44:43 PM

1,799.0000

2

TQEX

Genmab A/S

25/06/2024

1:44:43 PM

1,799.0000

9

TQEX

Genmab A/S

25/06/2024

1:44:43 PM

1,799.0000

16

TQEX

Genmab A/S

25/06/2024

1:45:01 PM

1,799.0000

2

TQEX

Genmab A/S

25/06/2024

1:45:01 PM

1,799.0000

3

TQEX

Genmab A/S

25/06/2024

1:45:01 PM

1,799.0000

2

TQEX

Genmab A/S

25/06/2024

1:45:08 PM

1,798.0000

25

XCSE

Genmab A/S

25/06/2024

1:45:08 PM

1,798.0000

8

XCSE

Genmab A/S

25/06/2024

1:45:30 PM

1,798.5000

5

CEUX

Genmab A/S

25/06/2024

1:45:30 PM

1,799.0000

4

CEUX

Genmab A/S

25/06/2024

1:45:30 PM

1,799.0000

4

CEUX

Genmab A/S

25/06/2024

1:45:30 PM

1,799.0000

11

CEUX

Genmab A/S

25/06/2024

1:45:44 PM

1,799.0000

5

CEUX

88


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

1:45:44 PM

1,799.0000

4

CEUX

Genmab A/S

25/06/2024

1:45:59 PM

1,798.5000

5

CEUX

Genmab A/S

25/06/2024

1:45:59 PM

1,798.5000

2

AQEU

Genmab A/S

25/06/2024

1:45:59 PM

1,798.5000

20

AQEU

Genmab A/S

25/06/2024

1:45:59 PM

1,798.5000

1

AQEU

Genmab A/S

25/06/2024

1:45:59 PM

1,798.5000

2

TQEX

Genmab A/S

25/06/2024

1:45:59 PM

1,798.5000

2

TQEX

Genmab A/S

25/06/2024

1:47:47 PM

1,798.5000

49

XCSE

Genmab A/S

25/06/2024

1:48:22 PM

1,798.5000

15

XCSE

Genmab A/S

25/06/2024

1:48:22 PM

1,798.5000

27

XCSE

Genmab A/S

25/06/2024

1:48:22 PM

1,798.5000

27

XCSE

Genmab A/S

25/06/2024

1:48:22 PM

1,798.5000

15

XCSE

Genmab A/S

25/06/2024

1:48:22 PM

1,798.5000

42

XCSE

Genmab A/S

25/06/2024

1:48:22 PM

1,798.5000

10

XCSE

Genmab A/S

25/06/2024

1:48:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:48:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:48:29 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

1:48:29 PM

1,798.5000

1

CEUX

Genmab A/S

25/06/2024

1:48:29 PM

1,798.5000

5

CEUX

Genmab A/S

25/06/2024

1:48:29 PM

1,798.5000

2

TQEX

Genmab A/S

25/06/2024

1:48:29 PM

1,798.5000

30

XCSE

Genmab A/S

25/06/2024

1:48:29 PM

1,798.5000

2

CEUX

Genmab A/S

25/06/2024

1:48:36 PM

1,798.0000

24

CEUX

Genmab A/S

25/06/2024

1:49:11 PM

1,798.5000

1

TQEX

Genmab A/S

25/06/2024

1:49:11 PM

1,798.5000

38

TQEX

Genmab A/S

25/06/2024

1:49:34 PM

1,798.5000

34

TQEX

Genmab A/S

25/06/2024

1:49:34 PM

1,798.5000

4

XCSE

Genmab A/S

25/06/2024

1:49:46 PM

1,798.0000

25

XCSE

Genmab A/S

25/06/2024

1:49:46 PM

1,798.0000

24

CEUX

Genmab A/S

25/06/2024

1:49:46 PM

1,798.0000

9

CEUX

Genmab A/S

25/06/2024

1:49:46 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

1:49:46 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

1:50:11 PM

1,797.5000

61

XCSE

Genmab A/S

25/06/2024

1:50:11 PM

1,797.5000

39

XCSE

Genmab A/S

25/06/2024

1:51:59 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:52:18 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:52:18 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:52:30 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:52:30 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:52:30 PM

1,798.0000

9

AQEU

Genmab A/S

25/06/2024

1:52:38 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:52:51 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:52:51 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:00 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:00 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:11 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:11 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:11 PM

1,798.0000

50

AQEU

89


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

1:53:20 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:20 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:31 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:31 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:42 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:42 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:53 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:53:53 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:05 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:05 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:14 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:14 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:43 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:43 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:54 PM

1,797.0000

10

CEUX

Genmab A/S

25/06/2024

1:54:55 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:54:55 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:03 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:03 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:15 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:15 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:23 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:23 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:36 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:36 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:47 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:47 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:59 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:55:59 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:00 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:00 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:00 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:00 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:15 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:15 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:28 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:28 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:28 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:28 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:28 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:29 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:29 PM

1,798.0000

2

AQEU

90


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

1:56:40 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:40 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:41 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:41 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:42 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:42 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:42 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:42 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:42 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:53 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:53 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:54 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:54 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:54 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:57 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:57 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:57 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:57 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:58 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:56:58 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

1:57:05 PM

1,797.5000

5

AQEU

Genmab A/S

25/06/2024

1:59:39 PM

1,798.5000

23

XCSE

Genmab A/S

25/06/2024

1:59:39 PM

1,798.5000

30

XCSE

Genmab A/S

25/06/2024

1:59:39 PM

1,798.5000

30

XCSE

Genmab A/S

25/06/2024

1:59:39 PM

1,798.5000

30

XCSE

Genmab A/S

25/06/2024

1:59:39 PM

1,798.5000

29

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

34

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

6

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

36

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

6

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

6

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

30

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

36

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

17

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

34

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

34

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

5

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

34

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

34

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

34

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

34

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

9

CEUX

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

19

XCSE

Genmab A/S

25/06/2024

1:59:40 PM

1,798.0000

21

XCSE

Genmab A/S

25/06/2024

2:01:38 PM

1,798.5000

24

XCSE

Genmab A/S

25/06/2024

2:01:49 PM

1,798.5000

8

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,799.0000

7

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,799.0000

17

XCSE

91


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

2:05:58 PM

1,799.0000

30

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

20

CEUX

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

99

CEUX

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

3

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

14

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

1

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

3

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

14

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

3

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

2

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

12

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

9

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

31

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

50

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

29

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

21

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

19

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

21

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

89

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

21

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

24

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

37

XCSE

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

20

CEUX

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

59

CEUX

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

40

CEUX

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

12

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

3

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

3

AQEU

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

20

CEUX

Genmab A/S

25/06/2024

2:05:58 PM

1,798.5000

61

CEUX

Genmab A/S

25/06/2024

2:06:28 PM

1,799.0000

67

CEUX

Genmab A/S

25/06/2024

2:06:28 PM

1,799.0000

11

TQEX

Genmab A/S

25/06/2024

2:06:28 PM

1,799.0000

75

XCSE

Genmab A/S

25/06/2024

2:06:42 PM

1,798.5000

9

CEUX

Genmab A/S

25/06/2024

2:06:42 PM

1,798.5000

8

CEUX

Genmab A/S

25/06/2024

2:06:42 PM

1,798.5000

1

AQEU

Genmab A/S

25/06/2024

2:06:42 PM

1,798.5000

9

XCSE

Genmab A/S

25/06/2024

2:06:42 PM

1,798.5000

6

XCSE

Genmab A/S

25/06/2024

2:06:42 PM

1,798.5000

5

TQEX

Genmab A/S

25/06/2024

2:06:42 PM

1,798.5000

3

TQEX

Genmab A/S

25/06/2024

2:08:15 PM

1,798.5000

9

XCSE

Genmab A/S

25/06/2024

2:08:15 PM

1,798.5000

9

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

14

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

26

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

101

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

92


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

10

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

14

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

15

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

5

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

36

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

4

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

4

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

2

TQEX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

2

TQEX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

19

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

17

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

24

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

7

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

26

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

26

XCSE

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

36

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

5

CEUX

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

9

AQEU

Genmab A/S

25/06/2024

2:08:41 PM

1,798.0000

2

TQEX

Genmab A/S

25/06/2024

2:13:19 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

2:13:19 PM

1,797.5000

13

CEUX

Genmab A/S

25/06/2024

2:13:19 PM

1,797.5000

5

TQEX

Genmab A/S

25/06/2024

2:16:08 PM

1,797.5000

22

XCSE

Genmab A/S

25/06/2024

2:16:41 PM

1,797.5000

19

XCSE

Genmab A/S

25/06/2024

2:16:41 PM

1,797.5000

1

XCSE

Genmab A/S

25/06/2024

2:16:41 PM

1,797.5000

37

CEUX

Genmab A/S

25/06/2024

2:16:41 PM

1,797.5000

95

CEUX

Genmab A/S

25/06/2024

2:16:44 PM

1,797.5000

37

CEUX

Genmab A/S

25/06/2024

2:16:44 PM

1,797.5000

105

XCSE

Genmab A/S

25/06/2024

2:16:44 PM

1,797.5000

41

XCSE

Genmab A/S

25/06/2024

2:16:44 PM

1,797.5000

19

XCSE

Genmab A/S

25/06/2024

2:16:44 PM

1,797.5000

18

XCSE

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

19

XCSE

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

46

XCSE

Genmab A/S

25/06/2024

2:16:59 PM

1,797.5000

28

XCSE

Genmab A/S

25/06/2024

2:16:59 PM

1,797.5000

89

XCSE

Genmab A/S

25/06/2024

2:16:59 PM

1,797.5000

37

XCSE

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

18

CEUX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

18

CEUX

93


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

18

CEUX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

6

CEUX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

2

AQEU

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

42

AQEU

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

9

TQEX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

5

TQEX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

13

TQEX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

5

TQEX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

9

TQEX

Genmab A/S

25/06/2024

2:16:59 PM

1,797.0000

5

TQEX

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

40

XCSE

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

40

XCSE

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

40

XCSE

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

30

XCSE

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

40

XCSE

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

7

XCSE

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

33

XCSE

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

37

CEUX

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

37

CEUX

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

3

CEUX

Genmab A/S

25/06/2024

2:25:29 PM

1,797.5000

13

CEUX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

11

CEUX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

11

CEUX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

11

CEUX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

11

CEUX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

11

CEUX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

14

TQEX

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

10

XCSE

Genmab A/S

25/06/2024

2:26:09 PM

1,800.0000

39

XCSE

Genmab A/S

25/06/2024

2:26:10 PM

1,800.0000

11

CEUX

Genmab A/S

25/06/2024

2:26:10 PM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

2:26:10 PM

1,800.0000

18

XCSE

Genmab A/S

25/06/2024

2:26:10 PM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

2:26:10 PM

1,800.0000

32

XCSE

Genmab A/S

25/06/2024

2:26:13 PM

1,800.0000

3

XCSE

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

19

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

19

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

19

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

19

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

17

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

6

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

3

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

94


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

5

TQEX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

18

XCSE

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

20

XCSE

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

20

XCSE

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

18

XCSE

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

1

XCSE

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

45

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

19

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

46

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

8

CEUX

Genmab A/S

25/06/2024

2:26:14 PM

1,799.5000

10

CEUX

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

19

XCSE

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

9

XCSE

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

10

XCSE

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

10

XCSE

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

9

XCSE

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

6

CEUX

Genmab A/S

25/06/2024

2:27:29 PM

1,798.0000

18

XCSE

Genmab A/S

25/06/2024

2:32:07 PM

1,798.0000

18

CEUX

Genmab A/S

25/06/2024

2:32:07 PM

1,798.0000

18

CEUX

Genmab A/S

25/06/2024

2:32:07 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

2:32:07 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.5000

98

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.5000

11

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.5000

47

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.5000

73

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

19

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

10

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

3

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

3

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

53

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

21

XCSE

95


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

20

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

88

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

73

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

54

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

3

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

1

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

10

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

3

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

4

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

21

AQEU

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

8

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

38

CEUX

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

18

XCSE

Genmab A/S

25/06/2024

2:32:25 PM

1,798.0000

7

XCSE

Genmab A/S

25/06/2024

2:41:42 PM

1,799.0000

8

XCSE

Genmab A/S

25/06/2024

2:41:42 PM

1,799.0000

88

XCSE

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

26

XCSE

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

241

XCSE

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

25

CEUX

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

25

CEUX

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

25

CEUX

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

25

CEUX

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

51

CEUX

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

41

CEUX

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

10

CEUX

Genmab A/S

25/06/2024

2:41:42 PM

1,799.5000

38

CEUX

Genmab A/S

25/06/2024

2:45:43 PM

1,797.5000

174

CEUX

Genmab A/S

25/06/2024

2:45:43 PM

1,797.5000

25

AQEU

Genmab A/S

25/06/2024

2:45:43 PM

1,797.5000

26

TQEX

Genmab A/S

25/06/2024

2:45:43 PM

1,797.5000

194

XCSE

Genmab A/S

25/06/2024

2:49:48 PM

1,799.5000

31

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

41

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

108

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

50

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

38

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

28

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

50

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

118

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

4

CEUX

Genmab A/S

25/06/2024

2:49:54 PM

1,799.5000

41

CEUX

Genmab A/S

25/06/2024

2:54:07 PM

1,801.0000

36

XCSE

Genmab A/S

25/06/2024

2:54:07 PM

1,801.0000

12

XCSE

Genmab A/S

25/06/2024

2:54:07 PM

1,801.0000

12

CEUX

Genmab A/S

25/06/2024

2:54:07 PM

1,801.0000

26

CEUX

96


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

2:56:09 PM

1,801.0000

38

XCSE

Genmab A/S

25/06/2024

2:56:09 PM

1,801.0000

10

XCSE

Genmab A/S

25/06/2024

2:56:09 PM

1,801.0000

140

XCSE

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

70

XCSE

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

38

XCSE

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

38

XCSE

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

38

XCSE

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

25

XCSE

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

10

TQEX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

45

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

18

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

22

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

13

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

18

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

17

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

3

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

3

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

20

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

9

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

16

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

5

AQEU

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

9

AQEU

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

5

AQEU

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

9

AQEU

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

5

AQEU

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

25

CEUX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

5

TQEX

Genmab A/S

25/06/2024

2:56:57 PM

1,801.0000

1

CEUX

Genmab A/S

25/06/2024

2:57:00 PM

1,801.0000

8

CEUX

Genmab A/S

25/06/2024

2:57:00 PM

1,801.0000

1

AQEU

Genmab A/S

25/06/2024

2:57:00 PM

1,801.0000

5

TQEX

Genmab A/S

25/06/2024

2:57:00 PM

1,801.0000

9

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

71

CEUX

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

10

AQEU

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

12

TQEX

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

28

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

19

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

80

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

5

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

31

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

11

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

20

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

47

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,801.0000

12

XCSE

Genmab A/S

25/06/2024

2:59:00 PM

1,800.5000

21

XCSE

Genmab A/S

25/06/2024

3:02:03 PM

1,799.5000

42

CEUX

Genmab A/S

25/06/2024

3:02:03 PM

1,799.5000

29

CEUX

Genmab A/S

25/06/2024

3:02:49 PM

1,800.0000

1

XCSE

97


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:03:24 PM

1,800.5000

34

TQEX

Genmab A/S

25/06/2024

3:03:27 PM

1,800.0000

33

XCSE

Genmab A/S

25/06/2024

3:03:47 PM

1,800.5000

9

AQEU

Genmab A/S

25/06/2024

3:03:47 PM

1,800.5000

9

TQEX

Genmab A/S

25/06/2024

3:04:44 PM

1,800.0000

25

CEUX

Genmab A/S

25/06/2024

3:04:53 PM

1,800.5000

2

AQEU

Genmab A/S

25/06/2024

3:05:05 PM

1,800.0000

44

XCSE

Genmab A/S

25/06/2024

3:05:21 PM

1,800.0000

27

XCSE

Genmab A/S

25/06/2024

3:05:21 PM

1,800.0000

1

XCSE

Genmab A/S

25/06/2024

3:05:21 PM

1,800.0000

22

XCSE

Genmab A/S

25/06/2024

3:06:13 PM

1,800.5000

80

CEUX

Genmab A/S

25/06/2024

3:06:13 PM

1,800.5000

10

CEUX

Genmab A/S

25/06/2024

3:06:13 PM

1,800.5000

27

TQEX

Genmab A/S

25/06/2024

3:06:13 PM

1,800.5000

24

TQEX

Genmab A/S

25/06/2024

3:06:13 PM

1,800.5000

9

TQEX

Genmab A/S

25/06/2024

3:06:13 PM

1,800.5000

4

TQEX

Genmab A/S

25/06/2024

3:06:13 PM

1,800.5000

5

CEUX

Genmab A/S

25/06/2024

3:06:37 PM

1,800.5000

4

CEUX

Genmab A/S

25/06/2024

3:06:41 PM

1,800.0000

10

CEUX

Genmab A/S

25/06/2024

3:07:50 PM

1,800.5000

5

AQEU

Genmab A/S

25/06/2024

3:07:50 PM

1,800.5000

9

AQEU

Genmab A/S

25/06/2024

3:07:50 PM

1,800.5000

20

AQEU

Genmab A/S

25/06/2024

3:08:55 PM

1,800.0000

10

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

25

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

25

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

93

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

17

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

7

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

28

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

58

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

86

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

64

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

84

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

50

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

19

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

10

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

5

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

38

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

5

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

7

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

5

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

5

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

7

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

5

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

7

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

93

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

71

XCSE

98


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

5

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

12

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

4

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

9

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

36

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

9

AQEU

Genmab A/S

25/06/2024

3:09:25 PM

1,800.0000

28

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,799.0000

12

XCSE

Genmab A/S

25/06/2024

3:09:25 PM

1,799.0000

20

CEUX

Genmab A/S

25/06/2024

3:09:25 PM

1,799.0000

9

XCSE

Genmab A/S

25/06/2024

3:09:26 PM

1,799.0000

21

XCSE

Genmab A/S

25/06/2024

3:09:26 PM

1,799.0000

20

CEUX

Genmab A/S

25/06/2024

3:13:55 PM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

3:15:31 PM

1,800.0000

18

XCSE

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

30

CEUX

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

41

CEUX

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

56

XCSE

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

20

XCSE

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

46

XCSE

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

80

XCSE

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

5

CEUX

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

42

CEUX

Genmab A/S

25/06/2024

3:15:44 PM

1,800.0000

7

TQEX

Genmab A/S

25/06/2024

3:16:21 PM

1,800.0000

24

CEUX

Genmab A/S

25/06/2024

3:17:49 PM

1,800.0000

26

XCSE

Genmab A/S

25/06/2024

3:17:49 PM

1,800.0000

23

XCSE

Genmab A/S

25/06/2024

3:17:49 PM

1,800.0000

84

XCSE

Genmab A/S

25/06/2024

3:18:21 PM

1,800.0000

18

CEUX

Genmab A/S

25/06/2024

3:20:11 PM

1,800.5000

34

XCSE

Genmab A/S

25/06/2024

3:20:11 PM

1,800.5000

6

XCSE

Genmab A/S

25/06/2024

3:20:23 PM

1,800.5000

13

CEUX

Genmab A/S

25/06/2024

3:20:23 PM

1,800.5000

8

CEUX

Genmab A/S

25/06/2024

3:20:23 PM

1,800.5000

13

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

92

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

172

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

56

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

24

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

10

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

4

AQEU

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

31

AQEU

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

1

AQEU

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

4

AQEU

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

2

TQEX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

4

TQEX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

2

TQEX

99


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

146

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

109

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

26

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

30

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

12

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

2

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

12

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

8

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

14

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

24

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

3

TQEX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

6

TQEX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

5

TQEX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

24

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

20

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

4

AQEU

Genmab A/S

25/06/2024

3:20:32 PM

1,800.0000

2

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

24

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

12

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

13

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

26

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

13

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

12

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

23

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

1

CEUX

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

3:20:32 PM

1,799.5000

14

XCSE

Genmab A/S

25/06/2024

3:20:33 PM

1,799.5000

24

CEUX

Genmab A/S

25/06/2024

3:20:33 PM

1,799.5000

10

XCSE

Genmab A/S

25/06/2024

3:20:34 PM

1,799.5000

23

XCSE

Genmab A/S

25/06/2024

3:20:34 PM

1,799.5000

26

XCSE

Genmab A/S

25/06/2024

3:20:34 PM

1,799.5000

15

XCSE

Genmab A/S

25/06/2024

3:28:00 PM

1,798.5000

35

CEUX

Genmab A/S

25/06/2024

3:28:00 PM

1,798.5000

50

CEUX

Genmab A/S

25/06/2024

3:28:00 PM

1,798.5000

61

CEUX

Genmab A/S

25/06/2024

3:28:00 PM

1,798.5000

21

AQEU

Genmab A/S

25/06/2024

3:28:00 PM

1,798.5000

27

XCSE

Genmab A/S

25/06/2024

3:28:00 PM

1,798.5000

135

XCSE

Genmab A/S

25/06/2024

3:28:21 PM

1,798.5000

15

CEUX

Genmab A/S

25/06/2024

3:28:21 PM

1,798.5000

3

CEUX

Genmab A/S

25/06/2024

3:28:21 PM

1,798.5000

19

XCSE

Genmab A/S

25/06/2024

3:28:21 PM

1,798.5000

16

XCSE

Genmab A/S

25/06/2024

3:28:23 PM

1,798.0000

12

CEUX

Genmab A/S

25/06/2024

3:28:23 PM

1,798.0000

19

XCSE

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

10

CEUX

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

9

CEUX

100


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

10

CEUX

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

6

XCSE

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

11

XCSE

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

8

XCSE

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

3:28:25 PM

1,798.0000

5

TQEX

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

99

CEUX

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

144

CEUX

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

15

TQEX

Genmab A/S

25/06/2024

3:30:01 PM

1,798.5000

5

AQEU

Genmab A/S

25/06/2024

3:30:01 PM

1,798.5000

34

AQEU

Genmab A/S

25/06/2024

3:30:01 PM

1,798.5000

5

AQEU

Genmab A/S

25/06/2024

3:30:01 PM

1,798.5000

39

XCSE

Genmab A/S

25/06/2024

3:30:01 PM

1,798.5000

39

XCSE

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

109

XCSE

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

115

XCSE

Genmab A/S

25/06/2024

3:30:01 PM

1,798.5000

39

XCSE

Genmab A/S

25/06/2024

3:30:01 PM

1,798.5000

72

XCSE

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

44

XCSE

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

14

AQEU

Genmab A/S

25/06/2024

3:30:01 PM

1,798.0000

20

AQEU

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

50

XCSE

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

39

CEUX

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

11

CEUX

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

4

XCSE

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

50

XCSE

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

50

CEUX

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

7

AQEU

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

10

CEUX

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

20

CEUX

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

10

CEUX

Genmab A/S

25/06/2024

3:36:48 PM

1,794.0000

54

XCSE

Genmab A/S

25/06/2024

3:38:01 PM

1,794.0000

213

XCSE

Genmab A/S

25/06/2024

3:38:01 PM

1,794.0000

5

CEUX

Genmab A/S

25/06/2024

3:38:01 PM

1,794.0000

2

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

9

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

10

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

19

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

19

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

2

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

16

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

17

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

17

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

17

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

8

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

2

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

2

AQEU

101


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

16

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

16

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

11

TQEX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

18

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

16

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

16

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

5

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

16

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,796.0000

13

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

21

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

15

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

21

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

40

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

21

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

10

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

12

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

4

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

3

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

14

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

21

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

10

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

11

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

1

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

18

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

19

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

2

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

19

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

19

CEUX

102


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

1

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

13

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

7

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

7

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

13

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.5000

9

AQEU

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

20

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

22

XCSE

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

20

CEUX

Genmab A/S

25/06/2024

3:39:44 PM

1,795.0000

22

XCSE

Genmab A/S

25/06/2024

3:40:51 PM

1,793.5000

3

XCSE

Genmab A/S

25/06/2024

3:40:52 PM

1,793.5000

1

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

38

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

19

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

19

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

11

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

11

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

8

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

17

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

19

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

1

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

3

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

16

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

9

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

2

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

1

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

3

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

3

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

21

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

38

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

21

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

21

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

21

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

103


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

21

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

11

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

6

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

40

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

5

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

8

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

5

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

5

CEUX

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

28

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

38

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

30

XCSE

Genmab A/S

25/06/2024

3:46:11 PM

1,796.0000

29

XCSE

Genmab A/S

25/06/2024

3:46:12 PM

1,796.0000

35

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

1

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

2

AQEU

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

2

AQEU

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

36

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

10

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

3

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

10

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

2

AQEU

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

9

AQEU

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

2

AQEU

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

1

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

2

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

9

CEUX

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

5

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

6

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

6

XCSE

Genmab A/S

25/06/2024

3:48:27 PM

1,797.5000

4

XCSE

Genmab A/S

25/06/2024

3:49:27 PM

1,796.5000

53

CEUX

Genmab A/S

25/06/2024

3:49:27 PM

1,796.5000

10

CEUX

Genmab A/S

25/06/2024

3:49:27 PM

1,796.5000

8

AQEU

104


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:49:27 PM

1,796.5000

2

AQEU

Genmab A/S

25/06/2024

3:49:27 PM

1,796.5000

36

XCSE

Genmab A/S

25/06/2024

3:49:40 PM

1,796.5000

54

XCSE

Genmab A/S

25/06/2024

3:49:40 PM

1,796.5000

5

XCSE

Genmab A/S

25/06/2024

3:50:14 PM

1,796.5000

10

XCSE

Genmab A/S

25/06/2024

3:50:25 PM

1,796.5000

53

CEUX

Genmab A/S

25/06/2024

3:50:25 PM

1,796.5000

8

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

49

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

17

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

7

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

16

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

8

TQEX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

16

TQEX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

4

TQEX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

8

TQEX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

7

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

14

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

2

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

55

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

19

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

7

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

19

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

20

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

19

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

48

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

19

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

23

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

17

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

17

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

17

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

17

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

17

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

1

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

13

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

4

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

4

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

13

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

9

TQEX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

24

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

6

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

15

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

105


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

3

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

24

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.5000

8

AQEU

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

26

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

26

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

26

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

24

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

24

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

24

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

24

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

16

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

8

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

24

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

3

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

18

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

18

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

8

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

26

XCSE

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

2

CEUX

Genmab A/S

25/06/2024

3:51:24 PM

1,796.0000

12

CEUX

Genmab A/S

25/06/2024

3:51:25 PM

1,795.5000

24

XCSE

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

9

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

11

XCSE

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

4

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

6

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

11

XCSE

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

6

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

16

AQEU

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

11

XCSE

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

39

XCSE

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

10

CEUX

Genmab A/S

25/06/2024

3:55:26 PM

1,796.0000

11

XCSE

Genmab A/S

25/06/2024

3:56:32 PM

1,795.5000

22

XCSE

Genmab A/S

25/06/2024

3:56:32 PM

1,795.5000

15

XCSE

Genmab A/S

25/06/2024

3:57:39 PM

1,796.0000

65

CEUX

Genmab A/S

25/06/2024

3:57:39 PM

1,796.0000

63

XCSE

106


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

3:57:39 PM

1,796.0000

8

XCSE

Genmab A/S

25/06/2024

3:57:39 PM

1,796.0000

2

XCSE

Genmab A/S

25/06/2024

3:57:39 PM

1,796.0000

8

XCSE

Genmab A/S

25/06/2024

3:57:39 PM

1,796.0000

65

CEUX

Genmab A/S

25/06/2024

3:57:39 PM

1,796.0000

73

XCSE

Genmab A/S

25/06/2024

3:57:40 PM

1,795.5000

19

XCSE

Genmab A/S

25/06/2024

3:57:40 PM

1,795.5000

54

XCSE

Genmab A/S

25/06/2024

3:57:40 PM

1,795.5000

16

CEUX

Genmab A/S

25/06/2024

3:57:40 PM

1,795.5000

10

AQEU

Genmab A/S

25/06/2024

3:57:59 PM

1,796.0000

1

XCSE

Genmab A/S

25/06/2024

3:58:06 PM

1,796.0000

10

XCSE

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

11

CEUX

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

11

CEUX

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

3

CEUX

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

2

AQEU

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

14

AQEU

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

11

XCSE

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

32

XCSE

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

11

CEUX

Genmab A/S

25/06/2024

3:58:25 PM

1,796.0000

11

XCSE

Genmab A/S

25/06/2024

4:00:25 PM

1,796.0000

39

CEUX

Genmab A/S

25/06/2024

4:00:25 PM

1,796.0000

6

AQEU

Genmab A/S

25/06/2024

4:00:49 PM

1,796.5000

11

XCSE

Genmab A/S

25/06/2024

4:01:13 PM

1,798.0000

1

AQEU

Genmab A/S

25/06/2024

4:01:13 PM

1,798.0000

27

AQEU

Genmab A/S

25/06/2024

4:01:25 PM

1,797.5000

29

CEUX

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

38

CEUX

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

38

CEUX

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

6

AQEU

Genmab A/S

25/06/2024

4:01:47 PM

1,798.0000

2

AQEU

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

63

CEUX

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

44

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

70

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

3

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

11

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

30

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

70

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

17

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

18

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

70

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

70

XCSE

Genmab A/S

25/06/2024

4:02:08 PM

1,798.0000

50

CEUX

107


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:03:26 PM

1,797.5000

62

CEUX

Genmab A/S

25/06/2024

4:04:15 PM

1,797.5000

11

XCSE

Genmab A/S

25/06/2024

4:05:01 PM

1,799.5000

25

CEUX

Genmab A/S

25/06/2024

4:05:01 PM

1,799.5000

26

XCSE

Genmab A/S

25/06/2024

4:05:03 PM

1,799.5000

25

CEUX

Genmab A/S

25/06/2024

4:05:03 PM

1,799.5000

26

XCSE

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

24

CEUX

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

63

CEUX

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

63

CEUX

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

6

CEUX

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

26

XCSE

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

69

XCSE

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

4

XCSE

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

83

XCSE

Genmab A/S

25/06/2024

4:05:10 PM

1,799.5000

69

XCSE

Genmab A/S

25/06/2024

4:05:25 PM

1,798.5000

23

XCSE

Genmab A/S

25/06/2024

4:05:25 PM

1,798.5000

4

XCSE

Genmab A/S

25/06/2024

4:06:25 PM

1,798.5000

22

CEUX

Genmab A/S

25/06/2024

4:06:25 PM

1,798.5000

23

XCSE

Genmab A/S

25/06/2024

4:07:26 PM

1,798.5000

22

CEUX

Genmab A/S

25/06/2024

4:07:26 PM

1,798.5000

1

CEUX

Genmab A/S

25/06/2024

4:07:26 PM

1,798.5000

23

XCSE

Genmab A/S

25/06/2024

4:07:26 PM

1,798.5000

2

CEUX

Genmab A/S

25/06/2024

4:07:26 PM

1,798.5000

23

XCSE

Genmab A/S

25/06/2024

4:08:26 PM

1,799.5000

4

CEUX

Genmab A/S

25/06/2024

4:08:26 PM

1,799.5000

9

AQEU

Genmab A/S

25/06/2024

4:08:26 PM

1,799.5000

16

AQEU

Genmab A/S

25/06/2024

4:08:26 PM

1,799.5000

2

TQEX

Genmab A/S

25/06/2024

4:08:26 PM

1,799.5000

12

XCSE

Genmab A/S

25/06/2024

4:08:59 PM

1,799.5000

9

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

44

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

49

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

59

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

44

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

5

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

16

AQEU

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

38

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

48

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

121

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

8

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

39

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

11

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

44

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

44

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

12

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

8

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

17

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

10

XCSE

108


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

19

CEUX

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

27

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

17

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

40

XCSE

Genmab A/S

25/06/2024

4:09:25 PM

1,799.5000

8

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

2

AQEU

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

16

AQEU

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

2

AQEU

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

2

AQEU

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

2

AQEU

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

38

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

2

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

6

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

2

AQEU

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

1

AQEU

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:11 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:12 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:12 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:13 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:13 PM

1,800.5000

11

CEUX

Genmab A/S

25/06/2024

4:10:13 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:14 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.5000

12

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.0000

5

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.0000

13

XCSE

Genmab A/S

25/06/2024

4:10:17 PM

1,800.0000

25

XCSE

Genmab A/S

25/06/2024

4:10:23 PM

1,799.5000

22

XCSE

Genmab A/S

25/06/2024

4:10:23 PM

1,799.5000

21

CEUX

Genmab A/S

25/06/2024

4:11:27 PM

1,799.0000

66

CEUX

Genmab A/S

25/06/2024

4:13:26 PM

1,798.5000

23

CEUX

Genmab A/S

25/06/2024

4:13:26 PM

1,798.5000

25

XCSE

Genmab A/S

25/06/2024

4:13:26 PM

1,798.5000

23

CEUX

109


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:13:26 PM

1,798.5000

25

XCSE

Genmab A/S

25/06/2024

4:14:43 PM

1,800.5000

34

CEUX

Genmab A/S

25/06/2024

4:15:23 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:15:23 PM

1,800.0000

24

XCSE

Genmab A/S

25/06/2024

4:15:23 PM

1,800.0000

30

XCSE

Genmab A/S

25/06/2024

4:15:23 PM

1,800.0000

20

XCSE

Genmab A/S

25/06/2024

4:15:23 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:15:23 PM

1,800.0000

28

XCSE

Genmab A/S

25/06/2024

4:15:24 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:15:24 PM

1,800.0000

65

XCSE

Genmab A/S

25/06/2024

4:15:24 PM

1,800.0000

17

XCSE

Genmab A/S

25/06/2024

4:15:24 PM

1,800.0000

37

XCSE

Genmab A/S

25/06/2024

4:16:24 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:16:49 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:16:49 PM

1,800.0000

27

XCSE

Genmab A/S

25/06/2024

4:16:49 PM

1,800.0000

27

XCSE

Genmab A/S

25/06/2024

4:16:49 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:16:49 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

30

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

24

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

24

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

30

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

24

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

12

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

42

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

4

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

50

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

41

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

13

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:17:01 PM

1,800.0000

41

XCSE

Genmab A/S

25/06/2024

4:17:02 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:17:02 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:17:02 PM

1,800.0000

52

XCSE

Genmab A/S

25/06/2024

4:17:03 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:17:03 PM

1,800.0000

54

XCSE

Genmab A/S

25/06/2024

4:19:57 PM

1,802.5000

32

CEUX

Genmab A/S

25/06/2024

4:20:02 PM

1,802.5000

36

XCSE

Genmab A/S

25/06/2024

4:20:02 PM

1,802.5000

36

XCSE

Genmab A/S

25/06/2024

4:20:02 PM

1,802.5000

32

CEUX

Genmab A/S

25/06/2024

4:20:02 PM

1,802.5000

32

CEUX

Genmab A/S

25/06/2024

4:20:02 PM

1,802.5000

13

CEUX

Genmab A/S

25/06/2024

4:20:02 PM

1,802.5000

8

CEUX

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

53

CEUX

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

53

CEUX

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

47

CEUX

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

3

CEUX

110


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

3

CEUX

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

8

AQEU

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

8

AQEU

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

8

AQEU

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

2

AQEU

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

8

AQEU

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

8

AQEU

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

59

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

59

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

23

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

36

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,802.0000

2

AQEU

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

37

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

7

TQEX

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

11

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

45

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

48

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

8

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

37

XCSE

Genmab A/S

25/06/2024

4:20:26 PM

1,801.5000

37

XCSE

Genmab A/S

25/06/2024

4:23:18 PM

1,800.0000

57

XCSE

Genmab A/S

25/06/2024

4:26:32 PM

1,800.0000

106

XCSE

Genmab A/S

25/06/2024

4:26:32 PM

1,800.0000

12

XCSE

Genmab A/S

25/06/2024

4:26:32 PM

1,800.0000

11

XCSE

Genmab A/S

25/06/2024

4:26:32 PM

1,800.0000

39

XCSE

Genmab A/S

25/06/2024

4:27:26 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

4:27:26 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

4:27:26 PM

1,800.0000

36

AQEU

Genmab A/S

25/06/2024

4:27:39 PM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

4:27:39 PM

1,800.0000

22

CEUX

Genmab A/S

25/06/2024

4:27:39 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

4:27:39 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

4:27:39 PM

1,800.0000

2

TQEX

Genmab A/S

25/06/2024

4:27:39 PM

1,800.0000

2

TQEX

Genmab A/S

25/06/2024

4:27:51 PM

1,800.0000

36

CEUX

Genmab A/S

25/06/2024

4:28:02 PM

1,800.0000

5

CEUX

Genmab A/S

25/06/2024

4:28:02 PM

1,800.0000

7

CEUX

Genmab A/S

25/06/2024

4:28:02 PM

1,800.0000

25

CEUX

Genmab A/S

25/06/2024

4:28:15 PM

1,800.0000

3

CEUX

Genmab A/S

25/06/2024

4:28:15 PM

1,800.0000

4

CEUX

Genmab A/S

25/06/2024

4:28:15 PM

1,800.0000

4

CEUX

Genmab A/S

25/06/2024

4:28:15 PM

1,800.0000

9

CEUX

Genmab A/S

25/06/2024

4:28:15 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

4:28:15 PM

1,800.0000

2

AQEU

Genmab A/S

25/06/2024

4:28:15 PM

1,800.0000

13

AQEU

Genmab A/S

25/06/2024

4:28:27 PM

1,800.0000

5

CEUX

Genmab A/S

25/06/2024

4:28:27 PM

1,800.0000

26

CEUX

Genmab A/S

25/06/2024

4:28:27 PM

1,800.0000

2

AQEU

111


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:28:27 PM

1,800.0000

2

TQEX

Genmab A/S

25/06/2024

4:28:27 PM

1,800.0000

2

XCSE

Genmab A/S

25/06/2024

4:28:39 PM

1,800.0000

36

TQEX

Genmab A/S

25/06/2024

4:28:48 PM

1,800.0000

37

CEUX

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

19

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

19

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

5

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

33

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

17

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

6

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

5

AQEU

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

30

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

2

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

4:28:58 PM

1,799.5000

3

XCSE

Genmab A/S

25/06/2024

4:28:59 PM

1,799.5000

38

XCSE

Genmab A/S

25/06/2024

4:28:59 PM

1,799.5000

25

XCSE

Genmab A/S

25/06/2024

4:29:42 PM

1,799.0000

3

AQEU

Genmab A/S

25/06/2024

4:29:42 PM

1,799.0000

16

AQEU

Genmab A/S

25/06/2024

4:30:12 PM

1,799.0000

20

XCSE

Genmab A/S

25/06/2024

4:30:12 PM

1,799.0000

5

XCSE

Genmab A/S

25/06/2024

4:31:00 PM

1,802.0000

20

CEUX

Genmab A/S

25/06/2024

4:31:00 PM

1,802.0000

13

CEUX

Genmab A/S

25/06/2024

4:31:00 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:00 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:00 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:00 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:00 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:02 PM

1,802.0000

19

XCSE

Genmab A/S

25/06/2024

4:31:02 PM

1,802.0000

1

XCSE

Genmab A/S

25/06/2024

4:31:02 PM

1,802.0000

4

XCSE

Genmab A/S

25/06/2024

4:31:02 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:02 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:03 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:03 PM

1,802.0000

19

XCSE

Genmab A/S

25/06/2024

4:31:03 PM

1,802.0000

5

XCSE

Genmab A/S

25/06/2024

4:31:03 PM

1,802.0000

19

XCSE

Genmab A/S

25/06/2024

4:31:03 PM

1,802.0000

23

XCSE

Genmab A/S

25/06/2024

4:31:03 PM

1,802.0000

1

XCSE

Genmab A/S

25/06/2024

4:31:04 PM

1,802.0000

13

XCSE

Genmab A/S

25/06/2024

4:31:04 PM

1,802.0000

11

XCSE

Genmab A/S

25/06/2024

4:31:07 PM

1,802.0000

24

XCSE

112


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:31:07 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:07 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:08 PM

1,802.0000

4

XCSE

Genmab A/S

25/06/2024

4:31:08 PM

1,802.0000

18

XCSE

Genmab A/S

25/06/2024

4:31:08 PM

1,802.0000

2

XCSE

Genmab A/S

25/06/2024

4:31:08 PM

1,802.0000

4

XCSE

Genmab A/S

25/06/2024

4:31:08 PM

1,802.0000

20

XCSE

Genmab A/S

25/06/2024

4:31:08 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:31:08 PM

1,802.0000

24

XCSE

Genmab A/S

25/06/2024

4:33:02 PM

1,801.0000

176

XCSE

Genmab A/S

25/06/2024

4:33:02 PM

1,801.0000

13

XCSE

Genmab A/S

25/06/2024

4:33:02 PM

1,801.0000

176

XCSE

Genmab A/S

25/06/2024

4:33:02 PM

1,801.0000

19

XCSE

Genmab A/S

25/06/2024

4:33:03 PM

1,801.0000

17

XCSE

Genmab A/S

25/06/2024

4:34:12 PM

1,801.5000

50

XCSE

Genmab A/S

25/06/2024

4:34:12 PM

1,801.5000

27

XCSE

Genmab A/S

25/06/2024

4:34:12 PM

1,801.5000

77

XCSE

Genmab A/S

25/06/2024

4:34:12 PM

1,801.5000

17

XCSE

Genmab A/S

25/06/2024

4:34:13 PM

1,801.5000

60

XCSE

Genmab A/S

25/06/2024

4:34:25 PM

1,801.0000

5

AQEU

Genmab A/S

25/06/2024

4:34:25 PM

1,801.0000

21

AQEU

Genmab A/S

25/06/2024

4:34:25 PM

1,801.0000

36

XCSE

Genmab A/S

25/06/2024

4:34:25 PM

1,801.0000

50

XCSE

Genmab A/S

25/06/2024

4:34:25 PM

1,801.0000

51

XCSE

Genmab A/S

25/06/2024

4:34:25 PM

1,801.0000

5

AQEU

Genmab A/S

25/06/2024

4:34:25 PM

1,801.0000

17

XCSE

Genmab A/S

25/06/2024

4:35:26 PM

1,800.0000

30

XCSE

Genmab A/S

25/06/2024

4:35:26 PM

1,800.0000

20

XCSE

Genmab A/S

25/06/2024

4:36:10 PM

1,800.5000

171

XCSE

Genmab A/S

25/06/2024

4:36:10 PM

1,800.5000

20

XCSE

Genmab A/S

25/06/2024

4:36:10 PM

1,800.5000

25

XCSE

Genmab A/S

25/06/2024

4:36:22 PM

1,800.0000

41

XCSE

Genmab A/S

25/06/2024

4:36:22 PM

1,800.0000

33

XCSE

Genmab A/S

25/06/2024

4:36:22 PM

1,800.0000

26

XCSE

Genmab A/S

25/06/2024

4:36:22 PM

1,800.0000

15

XCSE

Genmab A/S

25/06/2024

4:37:26 PM

1,798.5000

42

XCSE

Genmab A/S

25/06/2024

4:37:26 PM

1,798.5000

35

XCSE

Genmab A/S

25/06/2024

4:37:26 PM

1,798.5000

14

XCSE

Genmab A/S

25/06/2024

4:37:26 PM

1,798.5000

15

XCSE

Genmab A/S

25/06/2024

4:37:26 PM

1,798.5000

13

XCSE

Genmab A/S

25/06/2024

4:37:26 PM

1,798.5000

42

XCSE

Genmab A/S

25/06/2024

4:38:27 PM

1,799.0000

43

XCSE

Genmab A/S

25/06/2024

4:39:23 PM

1,799.5000

176

AQEU

Genmab A/S

25/06/2024

4:40:03 PM

1,800.5000

177

XCSE

Genmab A/S

25/06/2024

4:40:03 PM

1,800.5000

121

XCSE

Genmab A/S

25/06/2024

4:40:03 PM

1,800.5000

92

XCSE

Genmab A/S

25/06/2024

4:40:03 PM

1,800.5000

85

XCSE

Genmab A/S

25/06/2024

4:40:03 PM

1,800.5000

15

XCSE

113


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:41:04 PM

1,800.0000

14

XCSE

Genmab A/S

25/06/2024

4:41:04 PM

1,800.0000

36

XCSE

Genmab A/S

25/06/2024

4:42:23 PM

1,801.0000

339

XCSE

Genmab A/S

25/06/2024

4:42:23 PM

1,800.5000

42

XCSE

Genmab A/S

25/06/2024

4:43:23 PM

1,800.0000

333

XCSE

Genmab A/S

25/06/2024

4:44:02 PM

1,799.5000

179

XCSE

Genmab A/S

25/06/2024

4:44:02 PM

1,799.5000

50

XCSE

Genmab A/S

25/06/2024

4:44:02 PM

1,799.5000

34

XCSE

Genmab A/S

25/06/2024

4:44:19 PM

1,799.5000

50

XCSE

Genmab A/S

25/06/2024

4:44:20 PM

1,799.5000

34

XCSE

Genmab A/S

25/06/2024

4:44:20 PM

1,799.5000

16

XCSE

Genmab A/S

25/06/2024

4:44:20 PM

1,799.5000

50

XCSE

Genmab A/S

25/06/2024

4:46:24 PM

1,799.0000

185

XCSE

Genmab A/S

25/06/2024

4:46:24 PM

1,799.0000

173

XCSE

Genmab A/S

25/06/2024

4:46:59 PM

1,799.0000

21

XCSE

Genmab A/S

25/06/2024

4:47:03 PM

1,799.0000

18

AQEU

Genmab A/S

25/06/2024

4:47:03 PM

1,799.0000

116

XCSE

Genmab A/S

25/06/2024

4:47:03 PM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

4:47:03 PM

1,799.0000

5

XCSE

Genmab A/S

25/06/2024

4:47:03 PM

1,799.0000

9

XCSE

Genmab A/S

25/06/2024

4:47:03 PM

1,799.0000

17

XCSE

Genmab A/S

25/06/2024

4:47:03 PM

1,799.0000

9

XCSE

Genmab A/S

25/06/2024

4:47:04 PM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

4:47:05 PM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

4:47:06 PM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

4:47:07 PM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

4:47:08 PM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

4:48:17 PM

1,799.5000

40

CEUX

Genmab A/S

25/06/2024

4:48:25 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

4:48:25 PM

1,799.5000

9

AQEU

Genmab A/S

25/06/2024

4:48:25 PM

1,799.5000

28

AQEU

Genmab A/S

25/06/2024

4:48:31 PM

1,799.5000

35

AQEU

Genmab A/S

25/06/2024

4:48:31 PM

1,799.0000

26

XCSE

Genmab A/S

25/06/2024

4:48:31 PM

1,799.0000

29

XCSE

Genmab A/S

25/06/2024

4:48:43 PM

1,799.5000

23

AQEU

Genmab A/S

25/06/2024

4:48:43 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

4:48:43 PM

1,799.5000

10

AQEU

Genmab A/S

25/06/2024

4:48:49 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

4:48:52 PM

1,799.5000

2

AQEU

Genmab A/S

25/06/2024

4:48:55 PM

1,799.5000

80

XCSE

Genmab A/S

25/06/2024

4:49:01 PM

1,799.5000

24

CEUX

Genmab A/S

25/06/2024

4:49:01 PM

1,799.5000

11

TQEX

Genmab A/S

25/06/2024

4:49:08 PM

1,799.5000

29

AQEU

Genmab A/S

25/06/2024

4:49:49 PM

1,799.0000

48

XCSE

Genmab A/S

25/06/2024

4:49:49 PM

1,799.0000

38

XCSE

Genmab A/S

25/06/2024

4:49:49 PM

1,799.0000

38

XCSE

Genmab A/S

25/06/2024

4:49:49 PM

1,799.0000

1

XCSE

Genmab A/S

25/06/2024

4:49:52 PM

1,799.0000

22

XCSE

114


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

105

XCSE

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

75

XCSE

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

41

XCSE

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

88

XCSE

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

51

XCSE

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

88

XCSE

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

180

XCSE

Genmab A/S

25/06/2024

4:50:10 PM

1,801.0000

2

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.5000

126

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

48

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

42

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

52

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

42

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

11

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

48

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

42

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

52

XCSE

Genmab A/S

25/06/2024

4:51:09 PM

1,802.0000

114

XCSE

Genmab A/S

25/06/2024

4:51:47 PM

1,802.0000

27

XCSE

Genmab A/S

25/06/2024

4:52:25 PM

1,802.0000

126

XCSE

Genmab A/S

25/06/2024

4:52:25 PM

1,802.0000

50

XCSE

Genmab A/S

25/06/2024

4:52:25 PM

1,802.0000

3

XCSE

Genmab A/S

25/06/2024

4:52:25 PM

1,802.0000

12

XCSE

Genmab A/S

25/06/2024

4:52:25 PM

1,802.0000

73

XCSE

Genmab A/S

25/06/2024

4:52:48 PM

1,802.0000

118

XCSE

Genmab A/S

25/06/2024

4:52:48 PM

1,802.0000

7

XCSE

Genmab A/S

25/06/2024

4:52:49 PM

1,802.0000

149

XCSE

Genmab A/S

25/06/2024

4:52:51 PM

1,802.0000

42

XCSE

Genmab A/S

25/06/2024

4:52:51 PM

1,802.0000

45

XCSE

Genmab A/S

25/06/2024

4:52:52 PM

1,802.0000

17

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

50

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

50

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

11

CEUX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

16

CEUX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

5

CEUX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

24

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

2

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

18

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

3

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

7

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

38

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

93

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

3

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

22

CEUX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

4

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

28

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

24

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

7

XCSE

115


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

61

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

19

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

1

TQEX

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

21

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

6

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

76

XCSE

Genmab A/S

25/06/2024

4:53:23 PM

1,802.5000

28

XCSE

Genmab A/S

25/06/2024

4:53:58 PM

1,803.0000

2

AQEU

Genmab A/S

25/06/2024

4:53:58 PM

1,803.0000

2

AQEU

Genmab A/S

25/06/2024

4:53:58 PM

1,803.0000

11

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

5

XCSE

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

22

XCSE

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

106

XCSE

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

22

XCSE

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

9

XCSE

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

20

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

20

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

20

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

1

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

20

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

20

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

20

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

7

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

20

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

19

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

22

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

16

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

22

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

116


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

3

AQEU

Genmab A/S

26/06/2024

9:01:42 AM

1,794.0000

10

CEUX

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

16

XCSE

Genmab A/S

26/06/2024

9:01:42 AM

1,793.5000

23

XCSE

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

22

CEUX

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

22

CEUX

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

22

CEUX

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

22

CEUX

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

5

CEUX

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

4

AQEU

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

7

XCSE

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

24

XCSE

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

5

XCSE

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

24

XCSE

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

24

XCSE

Genmab A/S

26/06/2024

9:02:02 AM

1,793.0000

17

XCSE

Genmab A/S

26/06/2024

9:02:48 AM

1,791.5000

51

XCSE

Genmab A/S

26/06/2024

9:02:48 AM

1,791.5000

2

XCSE

Genmab A/S

26/06/2024

9:02:48 AM

1,791.5000

2

XCSE

Genmab A/S

26/06/2024

9:02:48 AM

1,791.5000

53

XCSE

Genmab A/S

26/06/2024

9:02:48 AM

1,791.5000

64

XCSE

Genmab A/S

26/06/2024

9:04:18 AM

1,796.5000

1

TQEX

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

24

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

19

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

5

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

14

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

24

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

5

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

19

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

24

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

24

XCSE

Genmab A/S

26/06/2024

9:04:26 AM

1,798.0000

18

XCSE

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

11

CEUX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

11

CEUX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

11

CEUX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

11

CEUX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

5

TQEX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

5

TQEX

117


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

10

XCSE

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

10

XCSE

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

5

TQEX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

2

CEUX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

5

TQEX

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

8

XCSE

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

19

XCSE

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

27

XCSE

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

27

XCSE

Genmab A/S

26/06/2024

9:05:44 AM

1,797.0000

18

XCSE

Genmab A/S

26/06/2024

9:06:51 AM

1,798.5000

30

XCSE

Genmab A/S

26/06/2024

9:06:51 AM

1,798.5000

50

XCSE

Genmab A/S

26/06/2024

9:06:51 AM

1,798.5000

13

XCSE

Genmab A/S

26/06/2024

9:07:07 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

3

CEUX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

5

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

23

TQEX

Genmab A/S

26/06/2024

9:07:09 AM

1,799.0000

9

TQEX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

11

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

50

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

35

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

11

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

11

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

11

XCSE

118


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

74

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

1

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

6

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

4

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

11

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

11

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

5

XCSE

Genmab A/S

26/06/2024

9:08:35 AM

1,803.0000

10

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

8

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

6

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

4

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

12

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,804.0000

4

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

20

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

20

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

3

AQEU

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

5

TQEX

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

6

CEUX

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

3

AQEU

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

42

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

16

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

6

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

42

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

16

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

5

TQEX

119


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

25

TQEX

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

22

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

13

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

14

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

6

XCSE

Genmab A/S

26/06/2024

9:09:19 AM

1,803.0000

49

CEUX

Genmab A/S

26/06/2024

9:11:49 AM

1,804.0000

21

XCSE

Genmab A/S

26/06/2024

9:13:01 AM

1,805.0000

2

CEUX

Genmab A/S

26/06/2024

9:13:01 AM

1,805.0000

35

CEUX

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

30

XCSE

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

9

XCSE

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

38

XCSE

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

37

XCSE

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

38

XCSE

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

34

CEUX

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

34

CEUX

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

16

CEUX

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

31

CEUX

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

38

XCSE

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

5

AQEU

Genmab A/S

26/06/2024

9:13:27 AM

1,805.0000

52

XCSE

Genmab A/S

26/06/2024

9:14:19 AM

1,807.5000

22

XCSE

Genmab A/S

26/06/2024

9:14:19 AM

1,807.5000

103

XCSE

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

21

XCSE

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

51

XCSE

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

17

XCSE

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

13

CEUX

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

22

CEUX

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

20

CEUX

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

17

CEUX

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

5

TQEX

Genmab A/S

26/06/2024

9:18:23 AM

1,810.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

31

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

8

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

63

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

43

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

29

CEUX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

29

CEUX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

26

CEUX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

29

CEUX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

19

CEUX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

4

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

34

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

4

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

2

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

120


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,812.0000

1

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

3

CEUX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

66

CEUX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

9

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

1

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

16

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

9

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

2

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

16

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

2

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

14

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

39

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

30

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

8

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

7

XCSE

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

1

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

9

AQEU

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

1

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

9

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

1

TQEX

Genmab A/S

26/06/2024

9:22:55 AM

1,811.5000

3

AQEU

Genmab A/S

26/06/2024

9:23:07 AM

1,809.0000

17

XCSE

Genmab A/S

26/06/2024

9:23:07 AM

1,809.0000

17

XCSE

Genmab A/S

26/06/2024

9:23:07 AM

1,809.0000

10

XCSE

Genmab A/S

26/06/2024

9:23:07 AM

1,809.0000

18

CEUX

Genmab A/S

26/06/2024

9:23:07 AM

1,809.0000

5

TQEX

Genmab A/S

26/06/2024

9:23:07 AM

1,809.0000

18

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

31

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

31

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

31

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

4

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

31

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

31

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

4

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

29

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

2

AQEU

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

3

AQEU

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

3

AQEU

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

121


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

2

CEUX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

2

AQEU

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

33

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

1

XCSE

Genmab A/S

26/06/2024

9:30:55 AM

1,815.0000

25

XCSE

Genmab A/S

26/06/2024

9:30:56 AM

1,815.0000

31

CEUX

Genmab A/S

26/06/2024

9:30:56 AM

1,815.0000

31

CEUX

Genmab A/S

26/06/2024

9:30:56 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:30:56 AM

1,815.0000

18

TQEX

Genmab A/S

26/06/2024

9:30:56 AM

1,815.0000

41

XCSE

Genmab A/S

26/06/2024

9:30:57 AM

1,815.0000

12

CEUX

Genmab A/S

26/06/2024

9:30:57 AM

1,815.0000

101

CEUX

Genmab A/S

26/06/2024

9:30:57 AM

1,815.0000

16

AQEU

Genmab A/S

26/06/2024

9:30:57 AM

1,815.0000

126

XCSE

Genmab A/S

26/06/2024

9:30:58 AM

1,813.5000

20

XCSE

Genmab A/S

26/06/2024

9:30:58 AM

1,813.5000

19

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

19

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

19

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

9

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

19

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

19

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

6

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

3

AQEU

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.5000

36

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

17

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

18

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

5

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

12

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

18

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

13

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

18

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

14

XCSE

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

18

CEUX

122


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

17

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

17

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

1

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

17

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

8

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

12

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

3

AQEU

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

2

AQEU

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

4

TQEX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

5

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

13

CEUX

Genmab A/S

26/06/2024

9:31:50 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

9:31:51 AM

1,812.0000

4

XCSE

Genmab A/S

26/06/2024

9:31:51 AM

1,812.0000

37

XCSE

Genmab A/S

26/06/2024

9:37:45 AM

1,813.5000

10

CEUX

Genmab A/S

26/06/2024

9:37:45 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

9:37:45 AM

1,813.5000

10

XCSE

Genmab A/S

26/06/2024

9:37:45 AM

1,813.5000

10

CEUX

Genmab A/S

26/06/2024

9:37:45 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

9:37:45 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

9:37:45 AM

1,813.5000

10

XCSE

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

20

CEUX

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

2

CEUX

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

18

CEUX

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

2

CEUX

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

12

CEUX

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

5

TQEX

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

21

XCSE

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

21

XCSE

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

16

XCSE

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

25

CEUX

Genmab A/S

26/06/2024

9:40:39 AM

1,815.0000

15

TQEX

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

11

XCSE

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

6

XCSE

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

11

XCSE

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

15

XCSE

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

11

XCSE

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

21

XCSE

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

10

CEUX

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

10

CEUX

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

10

CEUX

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

10

CEUX

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

2

CEUX

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

10

CEUX

Genmab A/S

26/06/2024

9:42:57 AM

1,817.0000

11

XCSE

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

47

CEUX

123


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

7

TQEX

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

52

XCSE

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

52

XCSE

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

52

XCSE

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

9

CEUX

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

7

TQEX

Genmab A/S

26/06/2024

9:43:01 AM

1,816.5000

7

TQEX

Genmab A/S

26/06/2024

9:44:56 AM

1,817.5000

8

TQEX

Genmab A/S

26/06/2024

9:44:56 AM

1,817.5000

15

TQEX

Genmab A/S

26/06/2024

9:44:56 AM

1,817.5000

8

XCSE

Genmab A/S

26/06/2024

9:44:56 AM

1,817.5000

7

XCSE

Genmab A/S

26/06/2024

9:45:14 AM

1,817.5000

9

TQEX

Genmab A/S

26/06/2024

9:45:14 AM

1,817.5000

16

XCSE

Genmab A/S

26/06/2024

9:45:14 AM

1,817.5000

13

XCSE

Genmab A/S

26/06/2024

9:45:31 AM

1,817.5000

16

XCSE

Genmab A/S

26/06/2024

9:45:31 AM

1,817.5000

21

XCSE

Genmab A/S

26/06/2024

9:45:50 AM

1,817.5000

9

TQEX

Genmab A/S

26/06/2024

9:45:50 AM

1,817.5000

18

XCSE

Genmab A/S

26/06/2024

9:45:50 AM

1,817.5000

8

XCSE

Genmab A/S

26/06/2024

9:45:50 AM

1,817.5000

6

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

10

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

12

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

22

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

22

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

6

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

22

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

22

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

6

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

22

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

7

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

1

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

1

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

2

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

124


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

2

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

2

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

20

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

13

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

4

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

15

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

4

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

1

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

2

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

5

TQEX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

14

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

11

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

23

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

23

XCSE

125


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

23

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

23

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

23

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

30

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,816.0000

21

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

36

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

8

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

8

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

3

AQEU

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

18

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

7

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

14

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

18

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

21

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

21

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

16

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

1

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

14

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

3

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

1

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

17

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

1

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

2

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

36

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

48

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

19

CEUX

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

20

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

10

XCSE

Genmab A/S

26/06/2024

9:46:00 AM

1,815.5000

8

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

17

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

44

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

61

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

33

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

9

AQEU

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

6

AQEU

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

3

AQEU

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

9

AQEU

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

9

AQEU

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

10

TQEX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

10

TQEX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

26

TQEX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

53

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

16

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

16

XCSE

126


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

2

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

2

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

3

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

1

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

4

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

5

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

6

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

10

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

19

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

4

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

39

CEUX

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

6

AQEU

Genmab A/S

26/06/2024

9:52:34 AM

1,813.5000

22

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

48

XCSE

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

6

AQEU

Genmab A/S

26/06/2024

9:52:34 AM

1,814.0000

1

AQEU

Genmab A/S

26/06/2024

9:52:35 AM

1,813.5000

22

XCSE

Genmab A/S

26/06/2024

9:52:35 AM

1,813.5000

22

XCSE

Genmab A/S

26/06/2024

9:52:35 AM

1,813.5000

21

CEUX

Genmab A/S

26/06/2024

9:52:35 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,816.0000

34

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,816.0000

61

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,816.0000

14

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,816.0000

15

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

12

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

10

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

19

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,816.0000

107

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

22

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

19

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

22

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

19

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

14

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

18

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

20

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

4

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

9

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

20

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

18

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

9

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

18

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

18

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

11

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

AQEU

127


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

AQEU

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

5

TQEX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

50

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

3

CEUX

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

18

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

30

XCSE

Genmab A/S

26/06/2024

9:57:21 AM

1,815.5000

2

XCSE

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

50

XCSE

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

51

XCSE

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

23

XCSE

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

38

XCSE

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

90

CEUX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

21

CEUX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

19

CEUX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

13

AQEU

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

3

AQEU

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

3

AQEU

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

14

TQEX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

5

TQEX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

9

TQEX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

5

TQEX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

18

CEUX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

5

TQEX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

5

TQEX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

5

TQEX

Genmab A/S

26/06/2024

10:01:28 AM

1,814.0000

50

XCSE

Genmab A/S

26/06/2024

10:23:12 AM

1,810.0000

10

CEUX

Genmab A/S

26/06/2024

10:23:12 AM

1,810.0000

10

XCSE

Genmab A/S

26/06/2024

10:23:12 AM

1,810.0000

10

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

26

XCSE

128


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

4

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

11

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

13

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

12

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

4

AQEU

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

4

AQEU

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

4

AQEU

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

4

AQEU

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

24

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

6

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

9

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

26

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

51

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

26

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

5

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

21

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

23

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

3

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

8

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

2

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

29

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

19

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

5

CEUX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

26

XCSE

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

10:25:50 AM

1,811.0000

3

CEUX

Genmab A/S

26/06/2024

10:29:55 AM

1,813.5000

6

CEUX

Genmab A/S

26/06/2024

10:29:55 AM

1,813.5000

27

CEUX

Genmab A/S

26/06/2024

10:29:55 AM

1,813.5000

6

CEUX

Genmab A/S

26/06/2024

10:29:55 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

10:29:55 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

AQEU

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

AQEU

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

AQEU

129


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

AQEU

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

3

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

60

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

9

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

1

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

3

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

3

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

15

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

18

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

7

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

15

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

3

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

13

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

13

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

AQEU

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

5

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

AQEU

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

AQEU

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

3

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

2

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

8

XCSE

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

36

CEUX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

4

TQEX

Genmab A/S

26/06/2024

10:30:13 AM

1,812.5000

39

CEUX

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

18

XCSE

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

18

XCSE

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

17

CEUX

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

1

CEUX

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

2

AQEU

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

2

AQEU

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

2

AQEU

130


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

6

CEUX

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

18

XCSE

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

1

XCSE

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

3

XCSE

Genmab A/S

26/06/2024

10:32:25 AM

1,813.5000

1

CEUX

Genmab A/S

26/06/2024

10:37:24 AM

1,814.0000

2

XCSE

Genmab A/S

26/06/2024

10:38:02 AM

1,814.0000

8

XCSE

Genmab A/S

26/06/2024

10:38:52 AM

1,815.0000

37

XCSE

Genmab A/S

26/06/2024

10:38:53 AM

1,815.0000

8

XCSE

Genmab A/S

26/06/2024

10:38:53 AM

1,815.0000

39

XCSE

Genmab A/S

26/06/2024

10:38:53 AM

1,815.0000

6

XCSE

Genmab A/S

26/06/2024

10:39:02 AM

1,815.0000

30

XCSE

Genmab A/S

26/06/2024

10:39:02 AM

1,815.0000

50

XCSE

Genmab A/S

26/06/2024

10:39:02 AM

1,815.0000

9

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,815.0000

30

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

1

AQEU

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

16

AQEU

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

4

TQEX

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

50

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

1

AQEU

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

2

AQEU

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

1

TQEX

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

CEUX

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

CEUX

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

5

CEUX

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

10

CEUX

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

5

CEUX

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

1

AQEU

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

2

XCSE

Genmab A/S

26/06/2024

10:39:13 AM

1,814.0000

8

XCSE

Genmab A/S

26/06/2024

10:39:16 AM

1,814.0000

2

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

6

XCSE

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

7

XCSE

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

3

XCSE

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

8

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

10

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

10

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

5

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

5

TQEX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

3

TQEX

131


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

10

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

5

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

1

CEUX

Genmab A/S

26/06/2024

10:39:25 AM

1,814.0000

10

XCSE

Genmab A/S

26/06/2024

10:39:46 AM

1,813.5000

20

CEUX

Genmab A/S

26/06/2024

10:39:46 AM

1,813.5000

20

CEUX

Genmab A/S

26/06/2024

10:39:46 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

10:41:01 AM

1,813.5000

20

XCSE

Genmab A/S

26/06/2024

10:41:01 AM

1,813.5000

7

XCSE

Genmab A/S

26/06/2024

10:42:20 AM

1,814.5000

8

AQEU

Genmab A/S

26/06/2024

10:42:20 AM

1,814.5000

29

AQEU

Genmab A/S

26/06/2024

10:42:42 AM

1,814.5000

40

CEUX

Genmab A/S

26/06/2024

10:43:03 AM

1,814.5000

9

CEUX

Genmab A/S

26/06/2024

10:43:03 AM

1,814.5000

2

AQEU

Genmab A/S

26/06/2024

10:43:03 AM

1,814.5000

7

AQEU

Genmab A/S

26/06/2024

10:44:04 AM

1,814.5000

36

CEUX

Genmab A/S

26/06/2024

10:44:04 AM

1,814.5000

16

AQEU

Genmab A/S

26/06/2024

10:44:04 AM

1,814.5000

2

AQEU

Genmab A/S

26/06/2024

10:44:04 AM

1,814.5000

6

XCSE

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

1

CEUX

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

37

CEUX

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

38

CEUX

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

AQEU

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

AQEU

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

AQEU

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

AQEU

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

AQEU

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

AQEU

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

AQEU

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

6

TQEX

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

9

TQEX

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

44

XCSE

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

40

XCSE

Genmab A/S

26/06/2024

10:44:45 AM

1,814.5000

25

XCSE

Genmab A/S

26/06/2024

10:44:53 AM

1,814.5000

4

CEUX

Genmab A/S

26/06/2024

10:45:54 AM

1,815.0000

38

TQEX

Genmab A/S

26/06/2024

10:46:22 AM

1,815.0000

7

AQEU

Genmab A/S

26/06/2024

10:46:22 AM

1,815.0000

29

TQEX

Genmab A/S

26/06/2024

10:46:39 AM

1,815.0000

17

TQEX

Genmab A/S

26/06/2024

10:46:39 AM

1,815.0000

2

TQEX

Genmab A/S

26/06/2024

10:46:57 AM

1,814.5000

10

CEUX

Genmab A/S

26/06/2024

10:46:57 AM

1,814.5000

24

CEUX

Genmab A/S

26/06/2024

10:46:57 AM

1,814.5000

38

CEUX

Genmab A/S

26/06/2024

10:46:57 AM

1,814.5000

38

CEUX

Genmab A/S

26/06/2024

10:46:57 AM

1,814.5000

19

CEUX

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

40

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

4

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

40

XCSE

132


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

17

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

27

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

34

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

6

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

6

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

38

CEUX

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

6

TQEX

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

34

CEUX

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

4

CEUX

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

23

CEUX

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

2

AQEU

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

6

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.5000

5

CEUX

Genmab A/S

26/06/2024

10:47:02 AM

1,814.0000

50

XCSE

Genmab A/S

26/06/2024

10:47:02 AM

1,814.0000

23

XCSE

Genmab A/S

26/06/2024

10:47:47 AM

1,813.5000

3

CEUX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

13

CEUX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

47

CEUX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

9

TQEX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

66

XCSE

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

30

XCSE

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

36

XCSE

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

60

CEUX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

10

CEUX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

9

TQEX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

1

TQEX

Genmab A/S

26/06/2024

10:50:04 AM

1,813.0000

60

CEUX

Genmab A/S

26/06/2024

10:52:39 AM

1,813.0000

6

AQEU

Genmab A/S

26/06/2024

10:52:39 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

10:55:12 AM

1,813.0000

8

AQEU

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

6

CEUX

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

20

CEUX

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

20

CEUX

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

11

CEUX

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

15

CEUX

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

9

TQEX

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

14

TQEX

Genmab A/S

26/06/2024

10:56:14 AM

1,814.0000

13

TQEX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.5000

40

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.5000

100

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.5000

46

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.5000

167

CEUX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.5000

26

TQEX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

40

CEUX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

25

CEUX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

5

CEUX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

70

CEUX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

7

CEUX

133


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

7

AQEU

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

3

AQEU

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

10

AQEU

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

10

AQEU

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

10

AQEU

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

11

TQEX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

11

TQEX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

11

TQEX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

11

TQEX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

2

TQEX

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

3

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

29

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

20

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

25

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

20

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

65

XCSE

Genmab A/S

26/06/2024

10:56:21 AM

1,813.0000

4

CEUX

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:02:32 AM

1,813.5000

2

XCSE

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

5

CEUX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

1

AQEU

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

4

TQEX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

1

TQEX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

37

XCSE

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:02:57 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

5

CEUX

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

4

CEUX

134


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:03:39 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:05:35 AM

1,814.0000

14

AQEU

Genmab A/S

26/06/2024

11:05:35 AM

1,814.0000

20

AQEU

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

2

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

1

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

1

TQEX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

XCSE

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

XCSE

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

XCSE

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:05:52 AM

1,813.5000

8

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

2

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

7

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

7

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

7

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

1

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

2

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

135


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

9

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

1

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

2

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

7

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

2

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

4

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

6

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

24

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

24

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

30

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

20

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

20

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

19

CEUX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

2

AQEU

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

5

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

4

TQEX

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

3

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

20

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

53

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

21

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

3

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.5000

10

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

20

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

53

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

24

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

47

XCSE

Genmab A/S

26/06/2024

11:06:16 AM

1,813.0000

40

XCSE

Genmab A/S

26/06/2024

11:10:57 AM

1,811.5000

15

XCSE

Genmab A/S

26/06/2024

11:10:57 AM

1,811.5000

13

XCSE

Genmab A/S

26/06/2024

11:10:57 AM

1,811.5000

27

CEUX

Genmab A/S

26/06/2024

11:10:57 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:10:57 AM

1,811.5000

28

XCSE

Genmab A/S

26/06/2024

11:10:57 AM

1,811.5000

27

CEUX

136


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:13:55 AM

1,812.0000

51

CEUX

Genmab A/S

26/06/2024

11:13:55 AM

1,812.0000

52

CEUX

Genmab A/S

26/06/2024

11:13:55 AM

1,812.0000

15

AQEU

Genmab A/S

26/06/2024

11:13:55 AM

1,812.0000

15

TQEX

Genmab A/S

26/06/2024

11:13:55 AM

1,812.0000

114

XCSE

Genmab A/S

26/06/2024

11:14:01 AM

1,811.5000

19

XCSE

Genmab A/S

26/06/2024

11:14:01 AM

1,811.5000

9

XCSE

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

10

CEUX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

10

XCSE

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

2

XCSE

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

8

XCSE

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

10

XCSE

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

32

XCSE

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

10

CEUX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

10

CEUX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

10

CEUX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

6

CEUX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

2

CEUX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

8

CEUX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

5

TQEX

Genmab A/S

26/06/2024

11:14:42 AM

1,812.5000

10

XCSE

Genmab A/S

26/06/2024

11:16:18 AM

1,811.0000

38

XCSE

Genmab A/S

26/06/2024

11:16:18 AM

1,811.0000

34

CEUX

Genmab A/S

26/06/2024

11:19:33 AM

1,811.0000

2

XCSE

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

71

XCSE

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

71

XCSE

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

26

XCSE

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

39

CEUX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

25

CEUX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

3

CEUX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

9

AQEU

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

9

AQEU

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

10

TQEX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

10

TQEX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

17

CEUX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

10

TQEX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

46

CEUX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

7

AQEU

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

7

TQEX

Genmab A/S

26/06/2024

11:20:20 AM

1,811.5000

18

XCSE

Genmab A/S

26/06/2024

11:20:21 AM

1,811.5000

2

XCSE

Genmab A/S

26/06/2024

11:20:21 AM

1,811.5000

31

XCSE

Genmab A/S

26/06/2024

11:23:25 AM

1,811.0000

116

CEUX

Genmab A/S

26/06/2024

11:23:25 AM

1,811.0000

8

CEUX

Genmab A/S

26/06/2024

11:24:30 AM

1,811.0000

12

CEUX

137


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:25:32 AM

1,811.5000

17

TQEX

Genmab A/S

26/06/2024

11:25:32 AM

1,811.5000

23

TQEX

Genmab A/S

26/06/2024

11:25:53 AM

1,811.5000

1

CEUX

Genmab A/S

26/06/2024

11:25:53 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:25:53 AM

1,811.5000

12

AQEU

Genmab A/S

26/06/2024

11:25:53 AM

1,811.5000

18

TQEX

Genmab A/S

26/06/2024

11:25:53 AM

1,811.5000

1

TQEX

Genmab A/S

26/06/2024

11:26:53 AM

1,811.5000

34

CEUX

Genmab A/S

26/06/2024

11:26:53 AM

1,811.5000

16

CEUX

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

12

CEUX

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

4

CEUX

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

2

CEUX

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

10

AQEU

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

10

TQEX

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

10

XCSE

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

7

CEUX

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

12

CEUX

Genmab A/S

26/06/2024

11:29:32 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:29:44 AM

1,812.5000

50

CEUX

Genmab A/S

26/06/2024

11:29:44 AM

1,812.5000

60

CEUX

Genmab A/S

26/06/2024

11:29:44 AM

1,812.0000

19

XCSE

Genmab A/S

26/06/2024

11:29:44 AM

1,812.5000

30

XCSE

Genmab A/S

26/06/2024

11:29:44 AM

1,812.0000

19

CEUX

Genmab A/S

26/06/2024

11:29:44 AM

1,812.0000

86

CEUX

Genmab A/S

26/06/2024

11:29:44 AM

1,812.5000

30

XCSE

Genmab A/S

26/06/2024

11:29:57 AM

1,812.0000

19

CEUX

Genmab A/S

26/06/2024

11:29:57 AM

1,812.0000

65

CEUX

Genmab A/S

26/06/2024

11:29:57 AM

1,812.0000

19

XCSE

Genmab A/S

26/06/2024

11:29:57 AM

1,812.0000

142

XCSE

Genmab A/S

26/06/2024

11:31:25 AM

1,812.0000

19

CEUX

Genmab A/S

26/06/2024

11:31:25 AM

1,812.0000

75

CEUX

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

9

XCSE

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

29

XCSE

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

7

XCSE

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

1

XCSE

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

1

XCSE

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

1

XCSE

Genmab A/S

26/06/2024

11:32:33 AM

1,812.0000

2

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

1

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

138


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

7

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

4

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

3

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

6

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

1

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

1

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

1

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

4

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

9

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

10

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

8

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

1

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

9

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

9

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

9

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

25

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

25

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

25

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,812.0000

11

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

20

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

20

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

20

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

15

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

2

AQEU

139


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

1

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

4

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

4

TQEX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

20

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

19

XCSE

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

36

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

4

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

4

CEUX

Genmab A/S

26/06/2024

11:33:23 AM

1,811.5000

8

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

50

CEUX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

11

CEUX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

61

CEUX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

17

CEUX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

9

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

5

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

4

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

9

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

9

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

8

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

9

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

1

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

3

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

2

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

3

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

3

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

6

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

19

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

11

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

4

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

34

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

15

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

49

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

25

CEUX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

1

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

1

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.5000

7

AQEU

Genmab A/S

26/06/2024

11:38:24 AM

1,811.0000

18

CEUX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.0000

18

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

11:38:24 AM

1,811.0000

3

XCSE

Genmab A/S

26/06/2024

11:38:24 AM

1,811.0000

14

XCSE

140


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:38:26 AM

1,811.0000

7

XCSE

Genmab A/S

26/06/2024

11:38:26 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

11:38:26 AM

1,811.0000

9

XCSE

Genmab A/S

26/06/2024

11:38:27 AM

1,811.0000

4

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

26

CEUX

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

26

CEUX

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

1

AQEU

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

27

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

27

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

27

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

23

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

4

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

27

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

17

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

10

XCSE

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

5

TQEX

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

26

CEUX

Genmab A/S

26/06/2024

11:44:55 AM

1,811.0000

26

CEUX

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

26

CEUX

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

4

TQEX

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

1

TQEX

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

1

TQEX

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

27

XCSE

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

21

XCSE

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

26

CEUX

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

64

XCSE

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

37

CEUX

Genmab A/S

26/06/2024

11:44:59 AM

1,811.0000

4

CEUX

Genmab A/S

26/06/2024

11:53:25 AM

1,812.0000

9

CEUX

Genmab A/S

26/06/2024

11:53:25 AM

1,812.0000

3

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

25

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

24

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

50

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

4

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

25

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

21

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

25

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

25

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

4

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

25

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

3

AQEU

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

1

AQEU

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

11

AQEU

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

3

AQEU

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

10

AQEU

141


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

1

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

13

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

3

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

22

TQEX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

10

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

26

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

24

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

50

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

14

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

26

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

24

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

30

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

26

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

38

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

8

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

14

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

4

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

18

XCSE

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

20

CEUX

Genmab A/S

26/06/2024

11:54:02 AM

1,811.5000

36

XCSE

Genmab A/S

26/06/2024

11:58:10 AM

1,811.5000

14

XCSE

Genmab A/S

26/06/2024

11:59:13 AM

1,812.5000

8

AQEU

Genmab A/S

26/06/2024

11:59:13 AM

1,812.5000

31

AQEU

Genmab A/S

26/06/2024

11:59:37 AM

1,812.0000

20

CEUX

Genmab A/S

26/06/2024

11:59:37 AM

1,812.0000

19

CEUX

Genmab A/S

26/06/2024

11:59:53 AM

1,811.5000

5

CEUX

Genmab A/S

26/06/2024

12:00:08 PM

1,812.0000

2

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

4

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

41

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

13

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

6

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

1

AQEU

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

6

AQEU

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

1

AQEU

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

6

AQEU

142


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

2

AQEU

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

7

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

2

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

7

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

2

TQEX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

8

XCSE

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

45

XCSE

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

8

XCSE

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

13

XCSE

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

30

XCSE

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

6

XCSE

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

2

XCSE

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:10 PM

1,811.5000

3

TQEX

Genmab A/S

26/06/2024

12:01:51 PM

1,811.5000

8

XCSE

Genmab A/S

26/06/2024

12:01:52 PM

1,811.5000

8

XCSE

Genmab A/S

26/06/2024

12:01:52 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:01:52 PM

1,811.5000

5

TQEX

Genmab A/S

26/06/2024

12:02:01 PM

1,811.5000

5

XCSE

Genmab A/S

26/06/2024

12:02:41 PM

1,811.0000

1

AQEU

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

15

CEUX

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

41

CEUX

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

88

CEUX

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

56

CEUX

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

9

CEUX

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

61

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

31

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

47

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

3

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

104

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

50

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

11

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

93

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

10

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.0000

51

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.0000

6

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.0000

51

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

30

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

50

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.5000

1

XCSE

Genmab A/S

26/06/2024

12:06:21 PM

1,811.0000

43

XCSE

143


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

12:06:21 PM

1,811.0000

5

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,809.5000

41

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,809.5000

26

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,810.0000

43

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,810.0000

39

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,810.0000

54

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,810.0000

38

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,809.5000

41

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,809.5000

4

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,809.5000

22

XCSE

Genmab A/S

26/06/2024

12:09:45 PM

1,809.5000

19

XCSE

Genmab A/S

26/06/2024

12:09:46 PM

1,809.5000

11

XCSE

Genmab A/S

26/06/2024

12:16:01 PM

1,807.5000

89

XCSE

Genmab A/S

26/06/2024

12:16:01 PM

1,807.5000

22

CEUX

Genmab A/S

26/06/2024

12:16:01 PM

1,807.5000

59

CEUX

Genmab A/S

26/06/2024

12:16:01 PM

1,807.5000

12

AQEU

Genmab A/S

26/06/2024

12:16:01 PM

1,807.5000

12

TQEX

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

4

XCSE

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

15

XCSE

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

19

XCSE

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

19

CEUX

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

15

CEUX

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

5

CEUX

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

5

TQEX

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

5

TQEX

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

2

XCSE

Genmab A/S

26/06/2024

12:16:27 PM

1,806.0000

19

XCSE

Genmab A/S

26/06/2024

12:19:34 PM

1,807.0000

70

XCSE

Genmab A/S

26/06/2024

12:19:34 PM

1,807.0000

33

CEUX

Genmab A/S

26/06/2024

12:20:03 PM

1,807.0000

3

XCSE

Genmab A/S

26/06/2024

12:21:37 PM

1,807.0000

1

XCSE

Genmab A/S

26/06/2024

12:21:37 PM

1,807.0000

52

XCSE

Genmab A/S

26/06/2024

12:21:37 PM

1,807.0000

46

CEUX

Genmab A/S

26/06/2024

12:21:37 PM

1,807.0000

8

TQEX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

67

CEUX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

5

CEUX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

3

CEUX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

46

CEUX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

22

CEUX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

10

AQEU

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

34

AQEU

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

11

TQEX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

10

TQEX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

79

XCSE

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

57

XCSE

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

20

XCSE

Genmab A/S

26/06/2024

12:23:10 PM

1,807.5000

25

AQEU

Genmab A/S

26/06/2024

12:23:10 PM

1,807.0000

20

CEUX

144


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

12:23:10 PM

1,807.0000

33

CEUX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.0000

3

CEUX

Genmab A/S

26/06/2024

12:23:10 PM

1,807.0000

74

XCSE

Genmab A/S

26/06/2024

12:23:10 PM

1,807.0000

30

CEUX

Genmab A/S

26/06/2024

12:28:20 PM

1,804.0000

21

XCSE

Genmab A/S

26/06/2024

12:28:20 PM

1,804.0000

10

XCSE

Genmab A/S

26/06/2024

12:31:13 PM

1,805.0000

11

CEUX

Genmab A/S

26/06/2024

12:31:13 PM

1,805.0000

12

XCSE

Genmab A/S

26/06/2024

12:33:00 PM

1,805.5000

39

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

2

AQEU

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,809.0000

8

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

6

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

3

CEUX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

5

TQEX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

9

TQEX

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

43

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

28

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

11

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

20

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

7

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

14

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

16

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.0000

25

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.0000

18

XCSE

145


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

12:33:43 PM

1,808.0000

6

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

21

XCSE

Genmab A/S

26/06/2024

12:33:43 PM

1,808.5000

4

XCSE

Genmab A/S

26/06/2024

12:36:12 PM

1,807.5000

90

XCSE

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

18

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

11

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

8

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

2

AQEU

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

5

TQEX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

XCSE

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

XCSE

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

10

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

9

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

12

CEUX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

2

AQEU

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

5

TQEX

Genmab A/S

26/06/2024

12:36:12 PM

1,807.0000

19

XCSE

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

19

XCSE

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

19

CEUX

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

19

CEUX

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

18

CEUX

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

7

CEUX

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

2

AQEU

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

2

AQEU

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

19

XCSE

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

5

XCSE

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

5

TQEX

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

6

XCSE

Genmab A/S

26/06/2024

12:36:13 PM

1,807.0000

76

XCSE

Genmab A/S

26/06/2024

12:42:08 PM

1,803.0000

26

XCSE

Genmab A/S

26/06/2024

12:42:08 PM

1,803.0000

26

XCSE

Genmab A/S

26/06/2024

12:42:08 PM

1,803.0000

26

XCSE

Genmab A/S

26/06/2024

12:42:08 PM

1,803.0000

21

CEUX

Genmab A/S

26/06/2024

12:42:08 PM

1,803.0000

5

CEUX

Genmab A/S

26/06/2024

12:42:08 PM

1,803.0000

26

CEUX

Genmab A/S

26/06/2024

12:44:13 PM

1,803.5000

7

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

2

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

1

AQEU

146


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

4

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

74

TQEX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

5

TQEX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

10

XCSE

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

21

XCSE

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

5

TQEX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

36

TQEX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

7

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

6

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

11

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

9

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

1

CEUX

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

10

XCSE

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

21

XCSE

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

10

XCSE

Genmab A/S

26/06/2024

12:46:14 PM

1,804.5000

21

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

54

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

50

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

49

CEUX

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

46

CEUX

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

7

AQEU

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

8

TQEX

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

8

TQEX

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

33

TQEX

Genmab A/S

26/06/2024

12:48:32 PM

1,804.0000

34

TQEX

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

48

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

36

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

37

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

5

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

5

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

5

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

25

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

13

XCSE

Genmab A/S

26/06/2024

12:48:32 PM

1,803.5000

42

XCSE

Genmab A/S

26/06/2024

12:48:33 PM

1,803.5000

11

XCSE

Genmab A/S

26/06/2024

12:48:33 PM

1,803.5000

42

XCSE

Genmab A/S

26/06/2024

12:50:25 PM

1,801.5000

48

XCSE

Genmab A/S

26/06/2024

12:50:25 PM

1,801.5000

48

XCSE

Genmab A/S

26/06/2024

12:50:25 PM

1,801.5000

34

CEUX

Genmab A/S

26/06/2024

12:50:25 PM

1,801.5000

48

XCSE

Genmab A/S

26/06/2024

12:50:25 PM

1,801.5000

18

XCSE

Genmab A/S

26/06/2024

12:50:25 PM

1,801.5000

11

XCSE

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

39

CEUX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

3

CEUX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

3

CEUX

147


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

19

CEUX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

1

AQEU

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

14

AQEU

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

7

TQEX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

10

TQEX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

1

TQEX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

11

CEUX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

7

CEUX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

11

CEUX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

3

CEUX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

1

AQEU

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

2

AQEU

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

3

TQEX

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

6

XCSE

Genmab A/S

26/06/2024

12:59:10 PM

1,803.0000

5

TQEX

Genmab A/S

26/06/2024

12:59:22 PM

1,802.5000

41

CEUX

Genmab A/S

26/06/2024

12:59:22 PM

1,802.5000

14

CEUX

Genmab A/S

26/06/2024

12:59:22 PM

1,802.5000

7

TQEX

Genmab A/S

26/06/2024

12:59:22 PM

1,802.5000

45

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

17

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

17

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

3

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

5

TQEX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

5

TQEX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

7

TQEX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

6

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

20

XCSE

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

17

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

17

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

12

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

17

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

17

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

12

CEUX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

2

AQEU

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

4

TQEX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

1

TQEX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

7

TQEX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

5

TQEX

Genmab A/S

26/06/2024

1:01:33 PM

1,802.0000

7

TQEX

Genmab A/S

26/06/2024

1:01:34 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:34 PM

1,802.0000

17

CEUX

Genmab A/S

26/06/2024

1:01:34 PM

1,802.0000

17

CEUX

148


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

1:01:34 PM

1,802.0000

12

CEUX

Genmab A/S

26/06/2024

1:01:35 PM

1,802.0000

5

TQEX

Genmab A/S

26/06/2024

1:01:35 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:35 PM

1,802.0000

24

XCSE

Genmab A/S

26/06/2024

1:01:35 PM

1,802.0000

24

XCSE

Genmab A/S

26/06/2024

1:01:35 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:01:35 PM

1,802.0000

13

XCSE

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

62

XCSE

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

23

CEUX

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

32

CEUX

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

52

CEUX

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

4

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

4

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

8

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

8

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

8

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

8

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

4

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

9

TQEX

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

9

TQEX

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

9

TQEX

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

9

TQEX

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

8

AQEU

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

45

XCSE

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

9

XCSE

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

2

XCSE

Genmab A/S

26/06/2024

1:06:11 PM

1,801.5000

2

CEUX

Genmab A/S

26/06/2024

1:06:12 PM

1,800.5000

35

XCSE

Genmab A/S

26/06/2024

1:06:12 PM

1,800.5000

8

XCSE

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

47

XCSE

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

19

XCSE

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

75

XCSE

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

44

XCSE

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

19

XCSE

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

4

XCSE

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

12

AQEU

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

5

TQEX

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

9

TQEX

Genmab A/S

26/06/2024

1:08:59 PM

1,800.0000

7

XCSE

Genmab A/S

26/06/2024

1:12:42 PM

1,801.0000

41

XCSE

Genmab A/S

26/06/2024

1:12:42 PM

1,801.0000

38

CEUX

Genmab A/S

26/06/2024

1:12:42 PM

1,801.0000

5

TQEX

Genmab A/S

26/06/2024

1:16:06 PM

1,801.5000

36

CEUX

Genmab A/S

26/06/2024

1:16:06 PM

1,801.5000

24

XCSE

Genmab A/S

26/06/2024

1:17:32 PM

1,802.0000

38

AQEU

Genmab A/S

26/06/2024

1:18:04 PM

1,802.0000

13

CEUX

149


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

1:18:04 PM

1,802.0000

3

CEUX

Genmab A/S

26/06/2024

1:18:04 PM

1,802.0000

23

CEUX

Genmab A/S

26/06/2024

1:18:04 PM

1,802.0000

2

CEUX

Genmab A/S

26/06/2024

1:18:33 PM

1,802.0000

39

CEUX

Genmab A/S

26/06/2024

1:18:44 PM

1,801.5000

1

AQEU

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

80

XCSE

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

53

XCSE

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

64

CEUX

Genmab A/S

26/06/2024

1:18:49 PM

1,801.0000

10

TQEX

Genmab A/S

26/06/2024

1:18:49 PM

1,801.0000

13

CEUX

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

2

AQEU

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

2

AQEU

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

9

AQEU

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

30

XCSE

Genmab A/S

26/06/2024

1:18:49 PM

1,801.5000

47

XCSE

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

70

XCSE

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

51

XCSE

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

50

CEUX

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

9

AQEU

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

51

XCSE

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

3

XCSE

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

1

XCSE

Genmab A/S

26/06/2024

1:18:50 PM

1,801.0000

35

XCSE

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

1

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

5

TQEX

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

19

CEUX

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

20

XCSE

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

26

XCSE

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

14

CEUX

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

4

TQEX

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

1

TQEX

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

1

AQEU

Genmab A/S

26/06/2024

1:20:23 PM

1,800.0000

2

AQEU

Genmab A/S

26/06/2024

1:22:46 PM

1,801.0000

4

XCSE

Genmab A/S

26/06/2024

1:24:22 PM

1,802.5000

21

CEUX

Genmab A/S

26/06/2024

1:24:22 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:26:51 PM

1,803.5000

8

AQEU

Genmab A/S

26/06/2024

1:27:55 PM

1,804.0000

13

CEUX

Genmab A/S

26/06/2024

1:27:55 PM

1,804.0000

12

CEUX

Genmab A/S

26/06/2024

1:28:13 PM

1,804.0000

34

CEUX

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

43

CEUX

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

42

CEUX

150


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

8

AQEU

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

4

AQEU

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

13

TQEX

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

47

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

2

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

44

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

47

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

23

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

23

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

21

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

12

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

83

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

28

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

22

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

12

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.5000

103

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

20

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

46

XCSE

Genmab A/S

26/06/2024

1:28:13 PM

1,803.0000

8

XCSE

Genmab A/S

26/06/2024

1:35:10 PM

1,801.0000

1

AQEU

Genmab A/S

26/06/2024

1:36:26 PM

1,801.5000

6

TQEX

Genmab A/S

26/06/2024

1:36:40 PM

1,801.5000

8

CEUX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

3

CEUX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

16

CEUX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

3

CEUX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

19

CEUX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

21

XCSE

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

21

XCSE

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

6

CEUX

Genmab A/S

26/06/2024

1:38:13 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:38:14 PM

1,802.5000

35

CEUX

Genmab A/S

26/06/2024

1:38:26 PM

1,802.5000

4

CEUX

Genmab A/S

26/06/2024

1:38:26 PM

1,802.5000

4

CEUX

Genmab A/S

26/06/2024

1:38:26 PM

1,802.5000

20

CEUX

Genmab A/S

26/06/2024

1:38:26 PM

1,802.5000

8

CEUX

Genmab A/S

26/06/2024

1:38:26 PM

1,802.5000

1

CEUX

Genmab A/S

26/06/2024

1:38:50 PM

1,802.5000

39

CEUX

Genmab A/S

26/06/2024

1:39:16 PM

1,802.5000

7

CEUX

Genmab A/S

26/06/2024

1:39:16 PM

1,802.5000

29

CEUX

Genmab A/S

26/06/2024

1:39:27 PM

1,801.5000

5

AQEU

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

31

CEUX

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

33

CEUX

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

33

CEUX

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

18

CEUX

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

5

TQEX

151


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

5

TQEX

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

37

XCSE

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

6

XCSE

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

5

XCSE

Genmab A/S

26/06/2024

1:39:38 PM

1,801.5000

26

XCSE

Genmab A/S

26/06/2024

1:41:00 PM

1,801.5000

31

CEUX

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

2

CEUX

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

1

CEUX

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

5

TQEX

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

5

TQEX

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

20

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

6

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

11

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

9

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

6

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

20

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

25

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

1

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

9

XCSE

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

5

TQEX

Genmab A/S

26/06/2024

1:41:01 PM

1,801.5000

5

TQEX

Genmab A/S

26/06/2024

1:41:42 PM

1,801.0000

41

CEUX

Genmab A/S

26/06/2024

1:41:42 PM

1,801.0000

17

CEUX

Genmab A/S

26/06/2024

1:44:43 PM

1,802.0000

8

XCSE

Genmab A/S

26/06/2024

1:44:53 PM

1,802.0000

8

XCSE

Genmab A/S

26/06/2024

1:44:53 PM

1,802.0000

7

XCSE

Genmab A/S

26/06/2024

1:45:00 PM

1,802.0000

7

XCSE

Genmab A/S

26/06/2024

1:45:00 PM

1,802.0000

8

XCSE

Genmab A/S

26/06/2024

1:45:00 PM

1,802.0000

12

XCSE

Genmab A/S

26/06/2024

1:45:00 PM

1,802.0000

5

XCSE

Genmab A/S

26/06/2024

1:45:19 PM

1,802.0000

30

XCSE

Genmab A/S

26/06/2024

1:45:19 PM

1,802.0000

6

XCSE

Genmab A/S

26/06/2024

1:45:43 PM

1,802.0000

2

XCSE

Genmab A/S

26/06/2024

1:45:43 PM

1,802.0000

30

XCSE

Genmab A/S

26/06/2024

1:45:43 PM

1,802.0000

4

XCSE

Genmab A/S

26/06/2024

1:46:05 PM

1,802.0000

2

XCSE

Genmab A/S

26/06/2024

1:46:05 PM

1,802.0000

30

XCSE

Genmab A/S

26/06/2024

1:46:05 PM

1,802.0000

5

XCSE

Genmab A/S

26/06/2024

1:46:32 PM

1,801.5000

34

CEUX

Genmab A/S

26/06/2024

1:47:00 PM

1,802.0000

13

XCSE

Genmab A/S

26/06/2024

1:47:12 PM

1,802.0000

7

XCSE

Genmab A/S

26/06/2024

1:47:12 PM

1,802.0000

6

XCSE

Genmab A/S

26/06/2024

1:47:23 PM

1,802.0000

7

XCSE

Genmab A/S

26/06/2024

1:47:31 PM

1,802.0000

36

XCSE

Genmab A/S

26/06/2024

1:47:46 PM

1,802.5000

14

AQEU

Genmab A/S

26/06/2024

1:47:46 PM

1,802.5000

10

AQEU

Genmab A/S

26/06/2024

1:48:05 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:48:05 PM

1,802.5000

2

AQEU

152


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

1:48:13 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:48:13 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

1:48:13 PM

1,802.5000

9

AQEU

Genmab A/S

26/06/2024

1:48:20 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

1:48:20 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:48:32 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

1:48:32 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:48:32 PM

1,802.5000

9

AQEU

Genmab A/S

26/06/2024

1:48:37 PM

1,801.5000

10

CEUX

Genmab A/S

26/06/2024

1:48:37 PM

1,801.5000

5

TQEX

Genmab A/S

26/06/2024

1:48:42 PM

1,802.0000

2

AQEU

Genmab A/S

26/06/2024

1:48:42 PM

1,802.0000

1

AQEU

Genmab A/S

26/06/2024

1:51:44 PM

1,802.0000

18

XCSE

Genmab A/S

26/06/2024

1:51:45 PM

1,802.0000

2

AQEU

Genmab A/S

26/06/2024

1:51:45 PM

1,802.0000

2

AQEU

Genmab A/S

26/06/2024

1:51:45 PM

1,802.0000

8

XCSE

Genmab A/S

26/06/2024

1:51:45 PM

1,802.0000

7

XCSE

Genmab A/S

26/06/2024

1:51:46 PM

1,801.5000

8

CEUX

Genmab A/S

26/06/2024

1:51:46 PM

1,801.5000

1

CEUX

Genmab A/S

26/06/2024

1:51:46 PM

1,801.5000

1

AQEU

Genmab A/S

26/06/2024

1:51:46 PM

1,801.5000

4

TQEX

Genmab A/S

26/06/2024

1:51:46 PM

1,802.0000

1

XCSE

Genmab A/S

26/06/2024

1:51:46 PM

1,802.0000

2

XCSE

Genmab A/S

26/06/2024

1:51:47 PM

1,802.0000

8

XCSE

Genmab A/S

26/06/2024

1:52:18 PM

1,801.5000

9

CEUX

Genmab A/S

26/06/2024

1:52:18 PM

1,801.5000

5

TQEX

Genmab A/S

26/06/2024

1:52:18 PM

1,801.5000

9

XCSE

Genmab A/S

26/06/2024

1:53:22 PM

1,802.5000

6

CEUX

Genmab A/S

26/06/2024

1:53:22 PM

1,802.5000

41

CEUX

Genmab A/S

26/06/2024

1:53:22 PM

1,802.5000

4

CEUX

Genmab A/S

26/06/2024

1:53:22 PM

1,802.5000

6

CEUX

Genmab A/S

26/06/2024

1:53:22 PM

1,802.5000

12

CEUX

Genmab A/S

26/06/2024

1:53:23 PM

1,802.5000

14

CEUX

Genmab A/S

26/06/2024

1:53:23 PM

1,802.5000

13

CEUX

Genmab A/S

26/06/2024

1:54:26 PM

1,802.5000

3

CEUX

Genmab A/S

26/06/2024

1:55:28 PM

1,803.0000

4

CEUX

Genmab A/S

26/06/2024

1:55:28 PM

1,803.0000

14

CEUX

Genmab A/S

26/06/2024

1:55:28 PM

1,803.0000

16

CEUX

Genmab A/S

26/06/2024

1:55:28 PM

1,803.0000

15

CEUX

Genmab A/S

26/06/2024

1:55:28 PM

1,803.0000

4

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

21

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

75

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

15

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

6

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

75

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

15

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

81

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

8

XCSE

153


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

3

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

20

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

64

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

4

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

20

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

26

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

46

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

4

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

16

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

20

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

3

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

9

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

11

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

20

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

11

CEUX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

9

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

7

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

10

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

3

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

4

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

9

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

10

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

1

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

1

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

4

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

10

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

9

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

5

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

3

TQEX

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

23

XCSE

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

7

XCSE

154


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

1:55:42 PM

1,802.5000

12

XCSE

Genmab A/S

26/06/2024

1:58:24 PM

1,801.0000

1

AQEU

Genmab A/S

26/06/2024

1:59:20 PM

1,801.0000

13

CEUX

Genmab A/S

26/06/2024

2:00:03 PM

1,801.5000

38

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

76

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

8

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

8

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

7

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

8

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

13

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

5

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

5

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

9

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

9

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

1

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

1

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

83

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

15

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

9

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

7

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

9

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

7

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

36

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

2

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

37

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

8

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

8

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

2

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

7

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

1

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

1

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

5

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

5

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

5

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

22

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

22

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

155


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

22

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

10

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

35

TQEX

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

25

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

23

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

2

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

34

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

5

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

24

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,801.0000

30

XCSE

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

11

CEUX

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

1

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

4

AQEU

Genmab A/S

26/06/2024

2:00:25 PM

1,800.5000

7

XCSE

Genmab A/S

26/06/2024

2:09:24 PM

1,801.5000

5

AQEU

Genmab A/S

26/06/2024

2:09:24 PM

1,801.5000

3

AQEU

Genmab A/S

26/06/2024

2:09:25 PM

1,801.5000

4

AQEU

Genmab A/S

26/06/2024

2:09:57 PM

1,802.0000

13

CEUX

Genmab A/S

26/06/2024

2:09:57 PM

1,802.0000

1

CEUX

Genmab A/S

26/06/2024

2:09:57 PM

1,802.0000

3

CEUX

Genmab A/S

26/06/2024

2:09:57 PM

1,802.0000

18

CEUX

Genmab A/S

26/06/2024

2:09:57 PM

1,802.0000

60

CEUX

Genmab A/S

26/06/2024

2:09:57 PM

1,802.0000

25

CEUX

Genmab A/S

26/06/2024

2:10:24 PM

1,801.5000

1

AQEU

Genmab A/S

26/06/2024

2:10:24 PM

1,801.5000

1

AQEU

Genmab A/S

26/06/2024

2:10:24 PM

1,801.5000

1

AQEU

Genmab A/S

26/06/2024

2:10:24 PM

1,801.5000

1

AQEU

Genmab A/S

26/06/2024

2:10:25 PM

1,801.5000

6

AQEU

Genmab A/S

26/06/2024

2:10:30 PM

1,802.0000

37

CEUX

Genmab A/S

26/06/2024

2:10:55 PM

1,802.0000

14

CEUX

Genmab A/S

26/06/2024

2:10:55 PM

1,802.0000

3

CEUX

Genmab A/S

26/06/2024

2:10:55 PM

1,802.0000

10

CEUX

Genmab A/S

26/06/2024

2:10:55 PM

1,802.0000

8

TQEX

Genmab A/S

26/06/2024

2:11:26 PM

1,802.0000

3

TQEX

Genmab A/S

26/06/2024

2:11:26 PM

1,802.0000

8

XCSE

Genmab A/S

26/06/2024

2:11:26 PM

1,802.0000

18

CEUX

Genmab A/S

26/06/2024

2:11:54 PM

1,802.5000

33

XCSE

Genmab A/S

26/06/2024

2:11:54 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

2:11:54 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

2:11:54 PM

1,802.5000

25

TQEX

Genmab A/S

26/06/2024

2:11:54 PM

1,802.5000

1

TQEX

Genmab A/S

26/06/2024

2:11:54 PM

1,802.5000

7

TQEX

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

10

CEUX

156


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

3

CEUX

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

2

AQEU

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

31

XCSE

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

30

XCSE

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

30

XCSE

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

11

CEUX

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

11

AQEU

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

47

CEUX

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

4

XCSE

Genmab A/S

26/06/2024

2:12:08 PM

1,802.5000

2

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

50

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

30

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

80

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

35

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

11

AQEU

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

1

AQEU

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

50

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

38

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

9

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

38

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

38

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

38

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

50

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

38

XCSE

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

45

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

9

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

62

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

20

CEUX

Genmab A/S

26/06/2024

2:12:19 PM

1,802.5000

4

CEUX

Genmab A/S

26/06/2024

2:18:49 PM

1,798.0000

12

CEUX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

12

CEUX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

8

CEUX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

12

CEUX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

5

CEUX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

1

AQEU

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

1

AQEU

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

5

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

5

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

5

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

2

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

1

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

5

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

5

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

4

TQEX

157


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

3

TQEX

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

1

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

10

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

8

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

12

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

11

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

8

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

11

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

8

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

9

XCSE

Genmab A/S

26/06/2024

2:20:03 PM

1,798.0000

9

XCSE

Genmab A/S

26/06/2024

2:20:04 PM

1,798.0000

8

XCSE

Genmab A/S

26/06/2024

2:20:04 PM

1,798.0000

8

XCSE

Genmab A/S

26/06/2024

2:20:05 PM

1,798.0000

8

XCSE

Genmab A/S

26/06/2024

2:20:08 PM

1,798.0000

1

AQEU

Genmab A/S

26/06/2024

2:20:08 PM

1,798.0000

20

AQEU

Genmab A/S

26/06/2024

2:20:08 PM

1,798.0000

3

CEUX

Genmab A/S

26/06/2024

2:20:08 PM

1,798.0000

7

CEUX

Genmab A/S

26/06/2024

2:20:08 PM

1,798.0000

9

AQEU

Genmab A/S

26/06/2024

2:20:08 PM

1,798.0000

1

AQEU

Genmab A/S

26/06/2024

2:20:10 PM

1,798.0000

29

AQEU

Genmab A/S

26/06/2024

2:24:04 PM

1,799.5000

16

CEUX

Genmab A/S

26/06/2024

2:24:04 PM

1,799.5000

9

CEUX

Genmab A/S

26/06/2024

2:24:04 PM

1,799.5000

2

TQEX

Genmab A/S

26/06/2024

2:24:04 PM

1,799.5000

13

XCSE

Genmab A/S

26/06/2024

2:24:30 PM

1,799.0000

41

CEUX

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

6

XCSE

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

2

TQEX

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

7

XCSE

Genmab A/S

26/06/2024

2:24:52 PM

1,799.5000

6

XCSE

Genmab A/S

26/06/2024

2:25:06 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:25:06 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:25:06 PM

1,799.5000

8

XCSE

Genmab A/S

26/06/2024

2:25:06 PM

1,799.5000

7

XCSE

Genmab A/S

26/06/2024

2:25:06 PM

1,799.5000

17

XCSE

Genmab A/S

26/06/2024

2:25:29 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:25:29 PM

1,799.5000

2

TQEX

Genmab A/S

26/06/2024

2:25:29 PM

1,799.5000

13

XCSE

Genmab A/S

26/06/2024

2:25:29 PM

1,799.5000

6

XCSE

Genmab A/S

26/06/2024

2:25:37 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:25:37 PM

1,799.5000

2

TQEX

Genmab A/S

26/06/2024

2:25:37 PM

1,799.5000

30

XCSE

Genmab A/S

26/06/2024

2:25:37 PM

1,799.5000

4

XCSE

Genmab A/S

26/06/2024

2:26:06 PM

1,799.5000

2

TQEX

158


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:26:06 PM

1,799.5000

1

TQEX

Genmab A/S

26/06/2024

2:26:06 PM

1,799.5000

2

TQEX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

8

TQEX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

53

CEUX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

7

CEUX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

45

CEUX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

53

CEUX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

52

CEUX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

20

CEUX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

20

CEUX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

8

AQEU

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

8

AQEU

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

8

TQEX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

59

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

58

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

50

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

29

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

21

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

6

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

15

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

17

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

9

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

11

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

41

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

58

XCSE

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

8

TQEX

Genmab A/S

26/06/2024

2:26:18 PM

1,799.0000

8

TQEX

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

19

XCSE

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

36

XCSE

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

11

CEUX

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

41

CEUX

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

50

CEUX

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

16

CEUX

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

8

AQEU

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

2

AQEU

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

5

AQEU

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

58

XCSE

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

4

XCSE

Genmab A/S

26/06/2024

2:26:19 PM

1,799.0000

29

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

3

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

1

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

1

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

5

TQEX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

5

TQEX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

XCSE

159


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

56

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

3

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

5

TQEX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

3

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

1

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

5

TQEX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

26

TQEX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

18

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

2

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

18

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

20

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

24

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

24

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

8

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

22

XCSE

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

21

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

21

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

21

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

16

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

21

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

8

CEUX

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.0000

4

AQEU

Genmab A/S

26/06/2024

2:31:58 PM

1,797.5000

19

TQEX

Genmab A/S

26/06/2024

2:39:23 PM

1,796.0000

18

CEUX

Genmab A/S

26/06/2024

2:39:23 PM

1,796.0000

20

AQEU

Genmab A/S

26/06/2024

2:39:23 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

37

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

160


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

7

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

10

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

33

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

21

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

323

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

21

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

11

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

1

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

10

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

11

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

7

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

5

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

5

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

10

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

25

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

7

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

5

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

1

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

10

CEUX

161


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

12

CEUX

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

2

AQEU

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

26

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

26

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

26

XCSE

Genmab A/S

26/06/2024

2:40:06 PM

1,796.0000

7

XCSE

Genmab A/S

26/06/2024

2:40:45 PM

1,792.5000

69

XCSE

Genmab A/S

26/06/2024

2:40:45 PM

1,792.0000

21

CEUX

Genmab A/S

26/06/2024

2:40:45 PM

1,792.0000

3

AQEU

Genmab A/S

26/06/2024

2:40:45 PM

1,792.0000

5

TQEX

Genmab A/S

26/06/2024

2:40:45 PM

1,792.0000

5

TQEX

Genmab A/S

26/06/2024

2:40:45 PM

1,792.0000

22

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

10

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

47

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

10

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

2

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

3

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

2

AQEU

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

2

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

10

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

10

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

7

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

2

AQEU

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

9

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

8

CEUX

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

2

AQEU

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

11

AQEU

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

1

XCSE

Genmab A/S

26/06/2024

2:46:55 PM

1,793.0000

4

XCSE

Genmab A/S

26/06/2024

2:48:27 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

33

CEUX

162


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

31

CEUX

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

3

AQEU

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

2

AQEU

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

AQEU

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

AQEU

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

AQEU

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

AQEU

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

TQEX

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

TQEX

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

TQEX

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

5

TQEX

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

37

XCSE

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

32

XCSE

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

30

CEUX

Genmab A/S

26/06/2024

2:48:39 PM

1,791.5000

15

CEUX

Genmab A/S

26/06/2024

2:49:10 PM

1,790.0000

23

XCSE

Genmab A/S

26/06/2024

2:49:10 PM

1,790.0000

5

TQEX

Genmab A/S

26/06/2024

2:49:10 PM

1,790.0000

22

CEUX

Genmab A/S

26/06/2024

2:49:10 PM

1,790.0000

1

CEUX

Genmab A/S

26/06/2024

2:49:10 PM

1,790.0000

3

AQEU

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

21

CEUX

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

3

AQEU

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

5

TQEX

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

20

XCSE

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

15

CEUX

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

7

CEUX

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

3

XCSE

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

23

XCSE

Genmab A/S

26/06/2024

2:49:11 PM

1,790.0000

7

CEUX

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

15

CEUX

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

3

AQEU

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

2

AQEU

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

5

TQEX

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

1

TQEX

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

5

TQEX

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

23

XCSE

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

5

XCSE

Genmab A/S

26/06/2024

2:49:13 PM

1,790.0000

6

CEUX

Genmab A/S

26/06/2024

2:51:09 PM

1,786.5000

19

CEUX

Genmab A/S

26/06/2024

2:51:09 PM

1,786.5000

1

CEUX

Genmab A/S

26/06/2024

2:51:09 PM

1,786.5000

5

TQEX

Genmab A/S

26/06/2024

2:51:09 PM

1,786.5000

21

XCSE

Genmab A/S

26/06/2024

2:51:09 PM

1,786.5000

5

TQEX

Genmab A/S

26/06/2024

2:52:58 PM

1,786.0000

67

XCSE

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

78

CEUX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

44

CEUX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

8

CEUX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

44

CEUX

163


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

11

TQEX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

2

TQEX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

87

XCSE

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

39

XCSE

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

18

XCSE

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

18

XCSE

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

18

XCSE

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

36

CEUX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

16

CEUX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

34

CEUX

Genmab A/S

26/06/2024

2:54:46 PM

1,787.0000

50

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

17

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

17

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

3

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

17

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

17

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

2

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

2

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

2

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

2

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

5

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

7

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

5

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

1

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

5

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

18

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

26

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

18

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

41

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

21

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

19

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

17

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

5

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

2

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

2

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

5

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

19

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

19

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

4

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

19

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

19

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

164


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

6

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

6

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

6

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

6

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

6

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,785.5000

6

TQEX

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

18

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

18

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

18

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

2

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,785.0000

49

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

20

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

20

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

20

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

20

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

6

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

6

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

18

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

12

CEUX

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,784.5000

3

AQEU

Genmab A/S

26/06/2024

2:56:12 PM

1,784.0000

14

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.0000

2

XCSE

Genmab A/S

26/06/2024

2:56:12 PM

1,784.0000

27

XCSE

Genmab A/S

26/06/2024

3:02:09 PM

1,779.0000

5

TQEX

Genmab A/S

26/06/2024

3:02:09 PM

1,779.0000

3

AQEU

Genmab A/S

26/06/2024

3:02:09 PM

1,779.0000

4

AQEU

Genmab A/S

26/06/2024

3:04:01 PM

1,777.5000

8

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,782.5000

85

CEUX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.5000

12

AQEU

Genmab A/S

26/06/2024

3:05:25 PM

1,782.5000

3

TQEX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.5000

10

TQEX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.5000

94

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

42

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

41

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

24

CEUX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

14

CEUX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

24

CEUX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

13

CEUX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

6

AQEU

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

6

AQEU

165


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

6

AQEU

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

6

AQEU

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

CEUX

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

2

AQEU

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

2

AQEU

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

30

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

CEUX

Genmab A/S

26/06/2024

3:05:25 PM

1,782.0000

20

XCSE

Genmab A/S

26/06/2024

3:05:25 PM

1,781.5000

10

CEUX

Genmab A/S

26/06/2024

3:07:51 PM

1,785.0000

21

XCSE

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

10

XCSE

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

25

XCSE

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

27

CEUX

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

5

TQEX

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

24

CEUX

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

5

TQEX

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

33

XCSE

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

34

XCSE

Genmab A/S

26/06/2024

3:08:15 PM

1,785.0000

13

XCSE

Genmab A/S

26/06/2024

3:09:52 PM

1,785.5000

8

XCSE

Genmab A/S

26/06/2024

3:10:39 PM

1,786.5000

23

XCSE

Genmab A/S

26/06/2024

3:10:39 PM

1,786.5000

11

XCSE

Genmab A/S

26/06/2024

3:10:39 PM

1,786.5000

12

XCSE

Genmab A/S

26/06/2024

3:10:39 PM

1,786.5000

12

XCSE

Genmab A/S

26/06/2024

3:10:39 PM

1,786.5000

11

XCSE

Genmab A/S

26/06/2024

3:10:39 PM

1,786.5000

23

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

6

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

3

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

16

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

12

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

2

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

5

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

1

XCSE

166


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

1

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

5

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

6

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

3

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

8

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

3

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

11

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

4

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

1

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.0000

43

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.5000

14

CEUX

Genmab A/S

26/06/2024

3:11:12 PM

1,788.0000

43

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.0000

12

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.0000

11

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.0000

8

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.0000

12

XCSE

Genmab A/S

26/06/2024

3:11:12 PM

1,788.0000

35

CEUX

Genmab A/S

26/06/2024

3:11:33 PM

1,785.5000

7

CEUX

Genmab A/S

26/06/2024

3:15:20 PM

1,787.0000

39

XCSE

Genmab A/S

26/06/2024

3:15:22 PM

1,786.5000

11

XCSE

Genmab A/S

26/06/2024

3:15:53 PM

1,787.5000

4

CEUX

Genmab A/S

26/06/2024

3:15:53 PM

1,787.5000

34

CEUX

Genmab A/S

26/06/2024

3:16:04 PM

1,787.5000

35

CEUX

Genmab A/S

26/06/2024

3:16:21 PM

1,787.5000

2

CEUX

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

34

CEUX

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

10

CEUX

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

33

CEUX

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

10

CEUX

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

3

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

7

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

10

CEUX

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

6

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

4

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

6

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

3

CEUX

Genmab A/S

26/06/2024

3:16:39 PM

1,787.5000

6

CEUX

Genmab A/S

26/06/2024

3:16:47 PM

1,787.5000

1

CEUX

Genmab A/S

26/06/2024

3:16:47 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:16:47 PM

1,787.5000

10

CEUX

Genmab A/S

26/06/2024

3:16:47 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:16:49 PM

1,787.5000

7

CEUX

Genmab A/S

26/06/2024

3:16:50 PM

1,787.5000

10

XCSE

167


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

25

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

11

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

14

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

14

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

11

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

3

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

24

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

1

XCSE

Genmab A/S

26/06/2024

3:19:14 PM

1,789.5000

16

XCSE

Genmab A/S

26/06/2024

3:19:18 PM

1,789.5000

22

XCSE

Genmab A/S

26/06/2024

3:19:18 PM

1,789.5000

13

XCSE

Genmab A/S

26/06/2024

3:19:33 PM

1,789.5000

13

CEUX

Genmab A/S

26/06/2024

3:19:33 PM

1,789.5000

16

XCSE

Genmab A/S

26/06/2024

3:19:33 PM

1,789.5000

6

XCSE

Genmab A/S

26/06/2024

3:19:51 PM

1,789.5000

7

CEUX

Genmab A/S

26/06/2024

3:19:51 PM

1,789.5000

16

XCSE

Genmab A/S

26/06/2024

3:19:51 PM

1,789.5000

18

XCSE

Genmab A/S

26/06/2024

3:20:14 PM

1,789.5000

11

CEUX

Genmab A/S

26/06/2024

3:20:14 PM

1,789.5000

10

XCSE

Genmab A/S

26/06/2024

3:20:25 PM

1,789.5000

39

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

12

CEUX

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

12

CEUX

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

11

CEUX

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

1

CEUX

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

2

CEUX

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

3

CEUX

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

12

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

10

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

2

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

12

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

7

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

12

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

9

CEUX

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

12

XCSE

Genmab A/S

26/06/2024

3:20:26 PM

1,789.0000

11

XCSE

Genmab A/S

26/06/2024

3:20:27 PM

1,789.0000

9

CEUX

Genmab A/S

26/06/2024

3:20:27 PM

1,789.0000

3

CEUX

Genmab A/S

26/06/2024

3:20:27 PM

1,789.0000

1

XCSE

Genmab A/S

26/06/2024

3:21:18 PM

1,788.5000

2

XCSE

Genmab A/S

26/06/2024

3:21:18 PM

1,788.5000

8

XCSE

Genmab A/S

26/06/2024

3:21:18 PM

1,788.5000

5

CEUX

Genmab A/S

26/06/2024

3:22:06 PM

1,789.5000

13

AQEU

Genmab A/S

26/06/2024

3:22:06 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,790.0000

49

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,790.0000

26

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,790.0000

1

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,790.0000

22

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,790.0000

1

XCSE

168


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:23:02 PM

1,790.0000

15

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

49

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

8

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

24

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

4

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

52

CEUX

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

52

CEUX

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

20

CEUX

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

8

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

8

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

8

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

8

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

8

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

12

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

41

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

24

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

12

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

24

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

24

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

12

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

9

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,789.5000

1

AQEU

Genmab A/S

26/06/2024

3:23:02 PM

1,788.5000

71

CEUX

Genmab A/S

26/06/2024

3:23:02 PM

1,788.5000

51

XCSE

Genmab A/S

26/06/2024

3:23:02 PM

1,788.5000

38

XCSE

Genmab A/S

26/06/2024

3:23:03 PM

1,788.5000

13

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

10

CEUX

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

2

AQEU

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

1

CEUX

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

9

CEUX

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

11

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

11

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

6

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

4

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

7

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

11

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

10

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

11

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

10

XCSE

Genmab A/S

26/06/2024

3:26:27 PM

1,789.0000

10

CEUX

Genmab A/S

26/06/2024

3:27:25 PM

1,790.0000

10

CEUX

Genmab A/S

26/06/2024

3:27:25 PM

1,790.0000

2

AQEU

Genmab A/S

26/06/2024

3:27:25 PM

1,790.0000

8

XCSE

Genmab A/S

26/06/2024

3:27:25 PM

1,790.0000

7

CEUX

Genmab A/S

26/06/2024

3:27:25 PM

1,790.0000

2

XCSE

Genmab A/S

26/06/2024

3:28:27 PM

1,789.0000

3

AQEU

Genmab A/S

26/06/2024

3:28:27 PM

1,789.0000

21

XCSE

169


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:29:32 PM

1,789.5000

56

XCSE

Genmab A/S

26/06/2024

3:29:32 PM

1,789.5000

51

CEUX

Genmab A/S

26/06/2024

3:29:32 PM

1,789.5000

51

CEUX

Genmab A/S

26/06/2024

3:29:32 PM

1,789.5000

21

CEUX

Genmab A/S

26/06/2024

3:29:32 PM

1,789.5000

56

XCSE

Genmab A/S

26/06/2024

3:29:32 PM

1,789.5000

29

XCSE

Genmab A/S

26/06/2024

3:29:32 PM

1,789.5000

4

CEUX

Genmab A/S

26/06/2024

3:29:33 PM

1,789.0000

11

XCSE

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

40

CEUX

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

15

CEUX

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

25

CEUX

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

40

CEUX

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

4

CEUX

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

2

CEUX

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

31

CEUX

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

6

AQEU

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

16

AQEU

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

6

AQEU

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

16

AQEU

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

13

XCSE

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

32

XCSE

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

7

XCSE

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

50

XCSE

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

45

XCSE

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

8

XCSE

Genmab A/S

26/06/2024

3:30:00 PM

1,787.5000

18

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

23

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

3

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

26

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

26

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

26

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

7

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

26

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

26

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

8

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

20

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

23

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

23

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

7

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

23

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

23

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

11

XCSE

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

13

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

2

CEUX

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

5

XCSE

170


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:30:01 PM

1,787.0000

32

CEUX

Genmab A/S

26/06/2024

3:33:56 PM

1,784.0000

5

CEUX

Genmab A/S

26/06/2024

3:33:56 PM

1,784.0000

16

CEUX

Genmab A/S

26/06/2024

3:33:56 PM

1,784.0000

3

AQEU

Genmab A/S

26/06/2024

3:33:56 PM

1,784.0000

22

XCSE

Genmab A/S

26/06/2024

3:33:56 PM

1,784.0000

8

CEUX

Genmab A/S

26/06/2024

3:33:56 PM

1,784.0000

22

XCSE

Genmab A/S

26/06/2024

3:35:47 PM

1,786.0000

15

CEUX

Genmab A/S

26/06/2024

3:35:47 PM

1,786.0000

22

XCSE

Genmab A/S

26/06/2024

3:35:47 PM

1,786.0000

5

CEUX

Genmab A/S

26/06/2024

3:35:47 PM

1,786.0000

2

AQEU

Genmab A/S

26/06/2024

3:37:57 PM

1,788.0000

36

TQEX

Genmab A/S

26/06/2024

3:38:10 PM

1,788.0000

16

TQEX

Genmab A/S

26/06/2024

3:38:10 PM

1,788.0000

9

TQEX

Genmab A/S

26/06/2024

3:38:25 PM

1,787.5000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

3

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

19

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

19

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

3

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

22

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

9

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

13

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

1

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

3

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

10

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

22

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

6

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

16

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

9

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

13

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

2

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

24

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

24

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

11

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

1

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

12

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

24

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

24

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

24

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

13

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,787.0000

13

XCSE

171


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

19

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

3

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

1

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

3

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

3

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

21

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

5

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

21

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

21

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

27

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

21

XCSE

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

19

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

3

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

1

AQEU

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

19

CEUX

Genmab A/S

26/06/2024

3:38:28 PM

1,786.0000

1

AQEU

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

7

AQEU

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

7

AQEU

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

9

AQEU

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

7

AQEU

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

7

AQEU

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

54

XCSE

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

14

XCSE

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

19

XCSE

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

59

XCSE

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

23

CEUX

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

26

CEUX

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

11

CEUX

Genmab A/S

26/06/2024

3:40:25 PM

1,785.0000

7

AQEU

Genmab A/S

26/06/2024

3:41:01 PM

1,787.5000

25

XCSE

Genmab A/S

26/06/2024

3:41:01 PM

1,787.5000

25

XCSE

Genmab A/S

26/06/2024

3:41:01 PM

1,787.5000

24

XCSE

Genmab A/S

26/06/2024

3:42:06 PM

1,787.5000

16

XCSE

Genmab A/S

26/06/2024

3:42:06 PM

1,787.5000

17

XCSE

Genmab A/S

26/06/2024

3:42:16 PM

1,787.5000

20

CEUX

Genmab A/S

26/06/2024

3:42:17 PM

1,787.5000

9

CEUX

Genmab A/S

26/06/2024

3:42:25 PM

1,787.5000

37

XCSE

Genmab A/S

26/06/2024

3:42:28 PM

1,787.0000

3

CEUX

Genmab A/S

26/06/2024

3:42:28 PM

1,787.0000

12

XCSE

Genmab A/S

26/06/2024

3:42:28 PM

1,787.0000

12

XCSE

Genmab A/S

26/06/2024

3:42:28 PM

1,787.0000

9

CEUX

Genmab A/S

26/06/2024

3:42:28 PM

1,787.0000

12

XCSE

Genmab A/S

26/06/2024

3:42:28 PM

1,787.0000

12

XCSE

Genmab A/S

26/06/2024

3:42:29 PM

1,787.0000

4

CEUX

Genmab A/S

26/06/2024

3:42:29 PM

1,787.0000

12

XCSE

Genmab A/S

26/06/2024

3:42:29 PM

1,787.0000

3

XCSE

Genmab A/S

26/06/2024

3:42:29 PM

1,787.0000

9

XCSE

Genmab A/S

26/06/2024

3:42:29 PM

1,787.0000

6

XCSE

172


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:42:29 PM

1,787.0000

8

CEUX

Genmab A/S

26/06/2024

3:42:29 PM

1,787.0000

12

CEUX

Genmab A/S

26/06/2024

3:42:30 PM

1,787.0000

12

XCSE

Genmab A/S

26/06/2024

3:42:30 PM

1,787.0000

6

XCSE

Genmab A/S

26/06/2024

3:42:31 PM

1,787.0000

6

XCSE

Genmab A/S

26/06/2024

3:42:31 PM

1,787.0000

11

CEUX

Genmab A/S

26/06/2024

3:42:31 PM

1,787.0000

2

XCSE

Genmab A/S

26/06/2024

3:42:31 PM

1,787.0000

8

XCSE

Genmab A/S

26/06/2024

3:42:31 PM

1,787.0000

2

XCSE

Genmab A/S

26/06/2024

3:42:54 PM

1,787.0000

6

XCSE

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

4

CEUX

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

11

CEUX

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

3

CEUX

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

10

XCSE

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

8

XCSE

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

8

XCSE

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

16

XCSE

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

16

XCSE

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

16

XCSE

Genmab A/S

26/06/2024

3:43:19 PM

1,787.0000

12

CEUX

Genmab A/S

26/06/2024

3:43:21 PM

1,787.0000

16

XCSE

Genmab A/S

26/06/2024

3:43:39 PM

1,787.0000

18

XCSE

Genmab A/S

26/06/2024

3:43:39 PM

1,787.0000

32

XCSE

Genmab A/S

26/06/2024

3:43:39 PM

1,787.0000

17

XCSE

Genmab A/S

26/06/2024

3:44:30 PM

1,788.0000

40

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

17

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

9

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

5

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

9

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

9

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

9

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

1

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

9

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

9

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

2

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

42

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

37

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

7

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

3

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

44

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

17

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

10

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

10

XCSE

173


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

24

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

22

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

12

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

10

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

12

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

10

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

4

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

16

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

3

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

12

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

20

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

4

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

20

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

4

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

9

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

15

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

39

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

30

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.5000

23

XCSE

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

9

AQEU

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

20

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

12

CEUX

Genmab A/S

26/06/2024

3:44:39 PM

1,787.0000

7

CEUX

Genmab A/S

26/06/2024

3:47:54 PM

1,789.5000

115

CEUX

Genmab A/S

26/06/2024

3:47:54 PM

1,789.5000

16

AQEU

Genmab A/S

26/06/2024

3:47:54 PM

1,789.5000

54

XCSE

Genmab A/S

26/06/2024

3:47:54 PM

1,789.5000

49

XCSE

Genmab A/S

26/06/2024

3:47:54 PM

1,789.5000

24

XCSE

Genmab A/S

26/06/2024

3:47:54 PM

1,788.5000

6

CEUX

Genmab A/S

26/06/2024

3:47:54 PM

1,788.5000

3

AQEU

Genmab A/S

26/06/2024

3:47:54 PM

1,788.5000

24

XCSE

Genmab A/S

26/06/2024

3:47:55 PM

1,788.5000

24

XCSE

Genmab A/S

26/06/2024

3:47:55 PM

1,788.5000

15

CEUX

Genmab A/S

26/06/2024

3:47:55 PM

1,788.5000

24

XCSE

Genmab A/S

26/06/2024

3:50:12 PM

1,789.5000

36

CEUX

Genmab A/S

26/06/2024

3:50:12 PM

1,789.5000

12

CEUX

Genmab A/S

26/06/2024

3:50:12 PM

1,789.5000

14

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

10

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

16

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

26

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

29

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

29

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

16

XCSE

174


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

13

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

16

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

13

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

16

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

13

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

26

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

26

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

26

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

26

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

4

AQEU

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

29

XCSE

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

6

CEUX

Genmab A/S

26/06/2024

3:50:20 PM

1,789.5000

46

CEUX

Genmab A/S

26/06/2024

3:55:41 PM

1,789.0000

21

XCSE

Genmab A/S

26/06/2024

3:55:41 PM

1,789.0000

21

XCSE

Genmab A/S

26/06/2024

3:55:41 PM

1,789.0000

1

CEUX

Genmab A/S

26/06/2024

3:55:41 PM

1,789.0000

19

CEUX

Genmab A/S

26/06/2024

3:55:41 PM

1,789.0000

11

CEUX

Genmab A/S

26/06/2024

3:55:42 PM

1,789.0000

21

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

23

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

15

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

23

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

12

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

3

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

1

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

25

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

39

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

20

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

3

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

14

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

26

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

20

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

2

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

1

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

22

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

4

AQEU

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

25

XCSE

175


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

23

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

2

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

22

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

17

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

8

XCSE

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

3

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

19

CEUX

Genmab A/S

26/06/2024

3:56:00 PM

1,788.0000

4

AQEU

Genmab A/S

26/06/2024

3:56:01 PM

1,788.0000

25

XCSE

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

22

CEUX

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

1

CEUX

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

18

CEUX

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

3

CEUX

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

15

XCSE

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

10

XCSE

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

15

XCSE

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

2

XCSE

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

6

XCSE

Genmab A/S

26/06/2024

3:56:02 PM

1,788.0000

22

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,788.0000

22

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,788.0000

22

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,788.0000

3

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,788.0000

4

AQEU

Genmab A/S

26/06/2024

3:56:03 PM

1,788.0000

8

AQEU

Genmab A/S

26/06/2024

3:56:03 PM

1,788.0000

20

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,787.5000

21

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,787.5000

21

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,787.5000

4

AQEU

Genmab A/S

26/06/2024

3:56:03 PM

1,787.5000

24

XCSE

Genmab A/S

26/06/2024

3:56:03 PM

1,787.5000

15

CEUX

Genmab A/S

26/06/2024

3:56:03 PM

1,787.5000

6

CEUX

Genmab A/S

26/06/2024

4:01:23 PM

1,788.5000

25

XCSE

Genmab A/S

26/06/2024

4:01:23 PM

1,788.5000

14

XCSE

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

36

CEUX

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

4

CEUX

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

9

AQEU

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

2

AQEU

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

9

TQEX

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

1

TQEX

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

2

TQEX

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

16

XCSE

Genmab A/S

26/06/2024

4:02:42 PM

1,791.5000

6

XCSE

Genmab A/S

26/06/2024

4:02:45 PM

1,791.5000

5

CEUX

Genmab A/S

26/06/2024

4:02:45 PM

1,791.5000

2

CEUX

Genmab A/S

26/06/2024

4:02:45 PM

1,791.5000

4

CEUX

Genmab A/S

26/06/2024

4:02:45 PM

1,791.5000

2

AQEU

Genmab A/S

26/06/2024

4:02:45 PM

1,791.5000

2

AQEU

176


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:02:45 PM

1,791.5000

9

AQEU

Genmab A/S

26/06/2024

4:02:45 PM

1,791.5000

16

AQEU

Genmab A/S

26/06/2024

4:02:46 PM

1,791.0000

11

XCSE

Genmab A/S

26/06/2024

4:02:47 PM

1,791.0000

3

CEUX

Genmab A/S

26/06/2024

4:02:47 PM

1,791.0000

11

XCSE

Genmab A/S

26/06/2024

4:02:48 PM

1,791.0000

11

XCSE

Genmab A/S

26/06/2024

4:03:07 PM

1,791.5000

4

TQEX

Genmab A/S

26/06/2024

4:03:11 PM

1,791.5000

4

AQEU

Genmab A/S

26/06/2024

4:03:11 PM

1,791.5000

9

AQEU

Genmab A/S

26/06/2024

4:03:14 PM

1,791.5000

9

AQEU

Genmab A/S

26/06/2024

4:03:14 PM

1,791.5000

2

AQEU

Genmab A/S

26/06/2024

4:03:14 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:03:14 PM

1,791.5000

3

TQEX

Genmab A/S

26/06/2024

4:03:14 PM

1,791.5000

9

TQEX

Genmab A/S

26/06/2024

4:03:14 PM

1,791.5000

2

TQEX

Genmab A/S

26/06/2024

4:03:14 PM

1,791.5000

2

TQEX

Genmab A/S

26/06/2024

4:03:19 PM

1,791.5000

3

AQEU

Genmab A/S

26/06/2024

4:03:19 PM

1,791.5000

9

AQEU

Genmab A/S

26/06/2024

4:03:19 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:03:23 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:03:23 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:03:23 PM

1,791.5000

9

AQEU

Genmab A/S

26/06/2024

4:03:23 PM

1,791.5000

2

TQEX

Genmab A/S

26/06/2024

4:03:23 PM

1,791.5000

9

TQEX

Genmab A/S

26/06/2024

4:03:23 PM

1,791.5000

2

TQEX

Genmab A/S

26/06/2024

4:03:27 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:03:27 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:03:29 PM

1,791.5000

2

AQEU

Genmab A/S

26/06/2024

4:03:29 PM

1,791.5000

1

AQEU

Genmab A/S

26/06/2024

4:03:34 PM

1,791.5000

2

AQEU

Genmab A/S

26/06/2024

4:03:34 PM

1,791.5000

2

AQEU

Genmab A/S

26/06/2024

4:03:34 PM

1,791.5000

9

AQEU

Genmab A/S

26/06/2024

4:03:40 PM

1,791.0000

8

XCSE

Genmab A/S

26/06/2024

4:03:40 PM

1,791.0000

2

XCSE

Genmab A/S

26/06/2024

4:03:40 PM

1,791.0000

10

CEUX

Genmab A/S

26/06/2024

4:03:40 PM

1,791.0000

10

CEUX

Genmab A/S

26/06/2024

4:03:40 PM

1,791.0000

2

AQEU

Genmab A/S

26/06/2024

4:03:41 PM

1,791.0000

9

CEUX

Genmab A/S

26/06/2024

4:03:41 PM

1,791.0000

10

XCSE

Genmab A/S

26/06/2024

4:03:41 PM

1,791.0000

1

CEUX

Genmab A/S

26/06/2024

4:03:41 PM

1,791.0000

2

AQEU

Genmab A/S

26/06/2024

4:03:42 PM

1,791.0000

10

CEUX

Genmab A/S

26/06/2024

4:03:42 PM

1,791.0000

10

XCSE

Genmab A/S

26/06/2024

4:03:42 PM

1,791.0000

10

XCSE

Genmab A/S

26/06/2024

4:03:59 PM

1,791.0000

34

XCSE

Genmab A/S

26/06/2024

4:04:05 PM

1,791.0000

39

CEUX

Genmab A/S

26/06/2024

4:04:16 PM

1,791.0000

36

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

20

CEUX

177


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

14

CEUX

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

6

CEUX

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

14

CEUX

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

3

AQEU

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

21

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

21

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

6

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

21

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

12

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

21

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

39

XCSE

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

20

CEUX

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

3

AQEU

Genmab A/S

26/06/2024

4:04:17 PM

1,790.5000

4

XCSE

Genmab A/S

26/06/2024

4:04:18 PM

1,790.5000

4

CEUX

Genmab A/S

26/06/2024

4:04:18 PM

1,790.5000

17

XCSE

Genmab A/S

26/06/2024

4:04:50 PM

1,790.5000

11

XCSE

Genmab A/S

26/06/2024

4:05:03 PM

1,790.5000

40

XCSE

Genmab A/S

26/06/2024

4:05:03 PM

1,790.5000

26

CEUX

Genmab A/S

26/06/2024

4:05:07 PM

1,790.5000

3

CEUX

Genmab A/S

26/06/2024

4:05:07 PM

1,790.5000

13

XCSE

Genmab A/S

26/06/2024

4:05:08 PM

1,790.5000

13

XCSE

Genmab A/S

26/06/2024

4:05:09 PM

1,790.5000

13

XCSE

Genmab A/S

26/06/2024

4:05:26 PM

1,790.0000

3

AQEU

Genmab A/S

26/06/2024

4:05:26 PM

1,790.0000

7

AQEU

Genmab A/S

26/06/2024

4:05:26 PM

1,790.0000

3

CEUX

Genmab A/S

26/06/2024

4:05:26 PM

1,790.0000

12

CEUX

Genmab A/S

26/06/2024

4:05:26 PM

1,790.0000

3

AQEU

Genmab A/S

26/06/2024

4:05:26 PM

1,790.0000

7

AQEU

Genmab A/S

26/06/2024

4:05:38 PM

1,790.0000

7

CEUX

Genmab A/S

26/06/2024

4:05:38 PM

1,790.0000

23

XCSE

Genmab A/S

26/06/2024

4:06:28 PM

1,790.5000

12

CEUX

Genmab A/S

26/06/2024

4:06:28 PM

1,790.5000

2

CEUX

Genmab A/S

26/06/2024

4:06:28 PM

1,790.5000

11

TQEX

Genmab A/S

26/06/2024

4:06:28 PM

1,790.5000

8

XCSE

Genmab A/S

26/06/2024

4:06:36 PM

1,790.5000

3

XCSE

Genmab A/S

26/06/2024

4:06:36 PM

1,790.5000

9

XCSE

Genmab A/S

26/06/2024

4:06:48 PM

1,790.5000

27

CEUX

Genmab A/S

26/06/2024

4:06:48 PM

1,790.5000

13

CEUX

Genmab A/S

26/06/2024

4:06:50 PM

1,790.5000

36

CEUX

Genmab A/S

26/06/2024

4:07:14 PM

1,790.5000

72

AQEU

Genmab A/S

26/06/2024

4:07:19 PM

1,790.5000

20

CEUX

Genmab A/S

26/06/2024

4:07:20 PM

1,790.5000

11

CEUX

Genmab A/S

26/06/2024

4:07:22 PM

1,790.5000

5

CEUX

Genmab A/S

26/06/2024

4:07:31 PM

1,790.5000

13

CEUX

Genmab A/S

26/06/2024

4:07:31 PM

1,790.5000

22

CEUX

Genmab A/S

26/06/2024

4:07:41 PM

1,790.5000

8

CEUX

Genmab A/S

26/06/2024

4:07:41 PM

1,790.5000

12

CEUX

178


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:07:41 PM

1,790.5000

2

AQEU

Genmab A/S

26/06/2024

4:07:41 PM

1,790.5000

11

AQEU

Genmab A/S

26/06/2024

4:07:41 PM

1,790.5000

5

TQEX

Genmab A/S

26/06/2024

4:07:51 PM

1,790.5000

3

CEUX

Genmab A/S

26/06/2024

4:07:51 PM

1,790.5000

12

CEUX

Genmab A/S

26/06/2024

4:07:51 PM

1,790.5000

9

AQEU

Genmab A/S

26/06/2024

4:07:51 PM

1,790.5000

8

TQEX

Genmab A/S

26/06/2024

4:07:51 PM

1,790.5000

6

XCSE

Genmab A/S

26/06/2024

4:08:11 PM

1,792.0000

72

AQEU

Genmab A/S

26/06/2024

4:08:20 PM

1,792.5000

14

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

21

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

21

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

21

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

5

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

15

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

22

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

22

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

22

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

9

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

4

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

9

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

24

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

12

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

16

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,793.0000

4

XCSE

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

22

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

22

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

6

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

3

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:15 PM

1,792.5000

4

AQEU

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

12

XCSE

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

27

CEUX

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

23

CEUX

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

9

CEUX

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

12

XCSE

Genmab A/S

26/06/2024

4:09:16 PM

1,792.5000

12

CEUX

Genmab A/S

26/06/2024

4:09:20 PM

1,792.0000

52

XCSE

Genmab A/S

26/06/2024

4:09:20 PM

1,792.0000

47

CEUX

Genmab A/S

26/06/2024

4:09:20 PM

1,792.0000

52

XCSE

Genmab A/S

26/06/2024

4:09:20 PM

1,792.0000

11

CEUX

Genmab A/S

26/06/2024

4:09:21 PM

1,792.0000

52

XCSE

179


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:10:55 PM

1,793.0000

18

CEUX

Genmab A/S

26/06/2024

4:11:34 PM

1,793.0000

19

XCSE

Genmab A/S

26/06/2024

4:11:34 PM

1,793.0000

18

CEUX

Genmab A/S

26/06/2024

4:11:34 PM

1,793.0000

18

CEUX

Genmab A/S

26/06/2024

4:11:34 PM

1,793.0000

19

XCSE

Genmab A/S

26/06/2024

4:12:10 PM

1,795.0000

16

AQEU

Genmab A/S

26/06/2024

4:12:10 PM

1,795.0000

9

XCSE

Genmab A/S

26/06/2024

4:12:11 PM

1,795.0000

7

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,795.0000

30

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

2

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

3

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

15

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

26

XCSE

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

16

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

8

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

17

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

22

CEUX

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

26

XCSE

Genmab A/S

26/06/2024

4:12:11 PM

1,794.5000

20

XCSE

Genmab A/S

26/06/2024

4:12:12 PM

1,794.5000

6

XCSE

Genmab A/S

26/06/2024

4:12:12 PM

1,794.5000

26

XCSE

Genmab A/S

26/06/2024

4:12:14 PM

1,794.5000

20

XCSE

Genmab A/S

26/06/2024

4:12:14 PM

1,794.5000

6

XCSE

Genmab A/S

26/06/2024

4:12:14 PM

1,794.5000

6

XCSE

Genmab A/S

26/06/2024

4:12:14 PM

1,794.5000

20

XCSE

Genmab A/S

26/06/2024

4:12:14 PM

1,794.5000

1

CEUX

Genmab A/S

26/06/2024

4:12:15 PM

1,794.5000

15

XCSE

Genmab A/S

26/06/2024

4:12:15 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:12:42 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:12:54 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:12:58 PM

1,795.0000

4

CEUX

Genmab A/S

26/06/2024

4:12:58 PM

1,795.0000

2

XCSE

Genmab A/S

26/06/2024

4:12:58 PM

1,795.0000

22

XCSE

Genmab A/S

26/06/2024

4:12:58 PM

1,795.0000

2

XCSE

Genmab A/S

26/06/2024

4:13:01 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:13:01 PM

1,795.0000

12

CEUX

Genmab A/S

26/06/2024

4:13:01 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:13:01 PM

1,793.5000

5

CEUX

Genmab A/S

26/06/2024

4:13:01 PM

1,793.5000

4

AQEU

Genmab A/S

26/06/2024

4:15:24 PM

1,795.0000

9

CEUX

Genmab A/S

26/06/2024

4:15:24 PM

1,795.0000

13

XCSE

Genmab A/S

26/06/2024

4:15:24 PM

1,795.0000

3

CEUX

Genmab A/S

26/06/2024

4:15:24 PM

1,795.0000

13

XCSE

Genmab A/S

26/06/2024

4:15:24 PM

1,795.0000

12

CEUX

Genmab A/S

26/06/2024

4:15:25 PM

1,795.0000

5

CEUX

Genmab A/S

26/06/2024

4:15:25 PM

1,795.0000

13

XCSE

Genmab A/S

26/06/2024

4:16:04 PM

1,795.0000

7

CEUX

Genmab A/S

26/06/2024

4:16:04 PM

1,795.0000

13

XCSE

180


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:16:04 PM

1,795.0000

13

XCSE

Genmab A/S

26/06/2024

4:16:04 PM

1,795.0000

13

XCSE

Genmab A/S

26/06/2024

4:16:04 PM

1,795.0000

12

CEUX

Genmab A/S

26/06/2024

4:16:04 PM

1,795.0000

12

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

7

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

3

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

6

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

5

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

2

AQEU

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

19

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

19

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

5

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

35

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

4

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

2

AQEU

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

4

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

2

AQEU

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:18:18 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:21:31 PM

1,795.0000

34

CEUX

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

27

CEUX

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

1

CEUX

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

21

CEUX

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

3

AQEU

181


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

22

XCSE

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

7

XCSE

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

22

XCSE

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

29

XCSE

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

29

XCSE

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

5

CEUX

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

27

CEUX

Genmab A/S

26/06/2024

4:21:33 PM

1,794.5000

29

XCSE

Genmab A/S

26/06/2024

4:21:34 PM

1,794.5000

19

CEUX

Genmab A/S

26/06/2024

4:21:34 PM

1,794.5000

29

XCSE

Genmab A/S

26/06/2024

4:21:34 PM

1,794.5000

8

CEUX

Genmab A/S

26/06/2024

4:21:34 PM

1,794.5000

17

XCSE

Genmab A/S

26/06/2024

4:21:34 PM

1,794.5000

12

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

29

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

6

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

23

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

5

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

23

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

6

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

9

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:21:35 PM

1,794.5000

9

CEUX

Genmab A/S

26/06/2024

4:23:23 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:23 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:23:23 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:23 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:28 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:28 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:28 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:33 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:33 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:38 PM

1,795.0000

6

AQEU

Genmab A/S

26/06/2024

4:23:38 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:38 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:43 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:46 PM

1,795.0000

6

AQEU

Genmab A/S

26/06/2024

4:23:46 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:23:46 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:46 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:51 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:23:51 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:23:51 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:54 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:54 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:23:54 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:23:58 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:23:58 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:24:01 PM

1,795.0000

1

AQEU

182


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:24:01 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:24:01 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:24:11 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:24:19 PM

1,795.0000

13

AQEU

Genmab A/S

26/06/2024

4:24:19 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:24:19 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:24:25 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:24:25 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

86

CEUX

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

86

CEUX

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

86

CEUX

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

3

CEUX

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

9

AQEU

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

96

XCSE

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

93

XCSE

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

36

XCSE

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

3

CEUX

Genmab A/S

26/06/2024

4:24:45 PM

1,794.5000

3

AQEU

Genmab A/S

26/06/2024

4:25:15 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:25:15 PM

1,795.0000

51

XCSE

Genmab A/S

26/06/2024

4:25:15 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:25:15 PM

1,795.0000

21

CEUX

Genmab A/S

26/06/2024

4:25:15 PM

1,795.0000

21

CEUX

Genmab A/S

26/06/2024

4:25:15 PM

1,795.0000

4

AQEU

Genmab A/S

26/06/2024

4:25:15 PM

1,795.0000

4

AQEU

Genmab A/S

26/06/2024

4:25:16 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:25:17 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:25:17 PM

1,795.0000

21

CEUX

Genmab A/S

26/06/2024

4:25:17 PM

1,795.0000

3

CEUX

Genmab A/S

26/06/2024

4:25:17 PM

1,795.0000

18

CEUX

Genmab A/S

26/06/2024

4:25:17 PM

1,795.0000

2

CEUX

Genmab A/S

26/06/2024

4:25:17 PM

1,795.0000

24

XCSE

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

21

CEUX

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

5

CEUX

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

18

XCSE

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

16

CEUX

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

36

CEUX

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:25:18 PM

1,794.5000

22

XCSE

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

39

XCSE

Genmab A/S

26/06/2024

4:25:18 PM

1,795.0000

2

XCSE

Genmab A/S

26/06/2024

4:25:18 PM

1,794.5000

21

CEUX

Genmab A/S

26/06/2024

4:25:18 PM

1,794.5000

5

CEUX

Genmab A/S

26/06/2024

4:25:18 PM

1,794.5000

2

CEUX

Genmab A/S

26/06/2024

4:25:18 PM

1,794.5000

22

XCSE

Genmab A/S

26/06/2024

4:25:19 PM

1,794.5000

22

XCSE

Genmab A/S

26/06/2024

4:25:20 PM

1,794.5000

3

CEUX

183


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:26:38 PM

1,794.0000

6

CEUX

Genmab A/S

26/06/2024

4:26:38 PM

1,794.0000

4

CEUX

Genmab A/S

26/06/2024

4:26:38 PM

1,794.0000

8

CEUX

Genmab A/S

26/06/2024

4:26:39 PM

1,794.0000

2

CEUX

Genmab A/S

26/06/2024

4:26:39 PM

1,794.0000

11

XCSE

Genmab A/S

26/06/2024

4:26:40 PM

1,794.0000

2

CEUX

Genmab A/S

26/06/2024

4:26:40 PM

1,794.0000

11

XCSE

Genmab A/S

26/06/2024

4:26:40 PM

1,794.0000

11

XCSE

Genmab A/S

26/06/2024

4:27:19 PM

1,794.0000

25

XCSE

Genmab A/S

26/06/2024

4:27:19 PM

1,794.0000

13

XCSE

Genmab A/S

26/06/2024

4:27:19 PM

1,794.0000

25

XCSE

Genmab A/S

26/06/2024

4:27:19 PM

1,794.0000

25

XCSE

Genmab A/S

26/06/2024

4:27:20 PM

1,794.0000

25

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

22

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

39

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

22

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

12

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

10

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

4

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

18

XCSE

Genmab A/S

26/06/2024

4:28:02 PM

1,793.5000

4

XCSE

Genmab A/S

26/06/2024

4:28:03 PM

1,793.5000

9

CEUX

Genmab A/S

26/06/2024

4:28:03 PM

1,793.5000

9

CEUX

Genmab A/S

26/06/2024

4:28:03 PM

1,793.5000

18

XCSE

Genmab A/S

26/06/2024

4:28:03 PM

1,793.5000

10

XCSE

Genmab A/S

26/06/2024

4:28:03 PM

1,793.5000

22

XCSE

Genmab A/S

26/06/2024

4:28:03 PM

1,793.5000

10

XCSE

Genmab A/S

26/06/2024

4:28:03 PM

1,793.5000

9

CEUX

Genmab A/S

26/06/2024

4:28:04 PM

1,793.5000

5

CEUX

Genmab A/S

26/06/2024

4:28:04 PM

1,793.5000

22

XCSE

Genmab A/S

26/06/2024

4:28:04 PM

1,793.5000

10

XCSE

Genmab A/S

26/06/2024

4:28:35 PM

1,793.0000

23

XCSE

Genmab A/S

26/06/2024

4:28:35 PM

1,793.0000

15

XCSE

Genmab A/S

26/06/2024

4:28:35 PM

1,793.0000

8

XCSE

Genmab A/S

26/06/2024

4:28:36 PM

1,793.0000

14

XCSE

Genmab A/S

26/06/2024

4:29:08 PM

1,792.5000

7

CEUX

Genmab A/S

26/06/2024

4:29:09 PM

1,792.5000

11

XCSE

Genmab A/S

26/06/2024

4:29:10 PM

1,792.5000

3

CEUX

Genmab A/S

26/06/2024

4:29:10 PM

1,792.5000

3

XCSE

Genmab A/S

26/06/2024

4:29:10 PM

1,792.5000

14

XCSE

Genmab A/S

26/06/2024

4:30:00 PM

1,791.5000

38

XCSE

Genmab A/S

26/06/2024

4:30:01 PM

1,791.5000

16

XCSE

Genmab A/S

26/06/2024

4:30:02 PM

1,791.5000

39

XCSE

Genmab A/S

26/06/2024

4:30:03 PM

1,791.5000

15

XCSE

Genmab A/S

26/06/2024

4:30:04 PM

1,791.5000

43

XCSE

Genmab A/S

26/06/2024

4:30:04 PM

1,791.5000

11

XCSE

Genmab A/S

26/06/2024

4:32:05 PM

1,795.0000

15

AQEU

Genmab A/S

26/06/2024

4:32:05 PM

1,795.0000

16

AQEU

184


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:32:05 PM

1,795.0000

1

AQEU

Genmab A/S

26/06/2024

4:32:05 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:32:08 PM

1,795.0000

16

AQEU

Genmab A/S

26/06/2024

4:32:08 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:32:08 PM

1,795.0000

2

AQEU

Genmab A/S

26/06/2024

4:32:08 PM

1,795.0000

50

AQEU

Genmab A/S

26/06/2024

4:32:08 PM

1,795.0000

8

AQEU

Genmab A/S

26/06/2024

4:32:08 PM

1,794.5000

150

XCSE

Genmab A/S

26/06/2024

4:32:08 PM

1,794.5000

16

XCSE

Genmab A/S

26/06/2024

4:32:16 PM

1,794.0000

108

XCSE

Genmab A/S

26/06/2024

4:32:16 PM

1,794.0000

23

XCSE

Genmab A/S

26/06/2024

4:32:16 PM

1,794.0000

11

XCSE

Genmab A/S

26/06/2024

4:32:16 PM

1,794.0000

23

XCSE

Genmab A/S

26/06/2024

4:32:16 PM

1,794.0000

23

XCSE

Genmab A/S

26/06/2024

4:33:00 PM

1,794.0000

85

XCSE

Genmab A/S

26/06/2024

4:33:00 PM

1,794.0000

131

XCSE

Genmab A/S

26/06/2024

4:33:00 PM

1,794.0000

40

XCSE

Genmab A/S

26/06/2024

4:33:00 PM

1,794.0000

91

XCSE

Genmab A/S

26/06/2024

4:33:01 PM

1,794.0000

68

XCSE

Genmab A/S

26/06/2024

4:33:01 PM

1,794.0000

63

XCSE

Genmab A/S

26/06/2024

4:33:01 PM

1,794.0000

131

XCSE

Genmab A/S

26/06/2024

4:33:10 PM

1,793.5000

35

CEUX

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

5

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

22

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

27

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

23

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

27

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

27

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

8

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

27

XCSE

Genmab A/S

26/06/2024

4:35:01 PM

1,795.0000

27

XCSE

Genmab A/S

26/06/2024

4:35:02 PM

1,795.0000

15

XCSE

Genmab A/S

26/06/2024

4:35:02 PM

1,795.0000

12

XCSE

Genmab A/S

26/06/2024

4:35:24 PM

1,795.0000

40

XCSE

Genmab A/S

26/06/2024

4:35:24 PM

1,795.0000

50

XCSE

Genmab A/S

26/06/2024

4:35:24 PM

1,795.0000

8

XCSE

Genmab A/S

26/06/2024

4:35:24 PM

1,795.0000

40

XCSE

Genmab A/S

26/06/2024

4:35:24 PM

1,795.0000

177

XCSE

Genmab A/S

26/06/2024

4:35:24 PM

1,795.0000

14

XCSE

Genmab A/S

26/06/2024

4:35:24 PM

1,795.0000

42

XCSE

Genmab A/S

26/06/2024

4:35:25 PM

1,795.0000

42

XCSE

Genmab A/S

26/06/2024

4:35:25 PM

1,795.0000

7

XCSE

Genmab A/S

26/06/2024

4:35:35 PM

1,795.0000

5

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

86

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

14

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

88

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

10

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

30

XCSE

185


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

10

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

78

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,794.5000

10

CEUX

Genmab A/S

26/06/2024

4:35:44 PM

1,794.5000

36

CEUX

Genmab A/S

26/06/2024

4:35:44 PM

1,794.5000

23

CEUX

Genmab A/S

26/06/2024

4:35:44 PM

1,794.5000

15

AQEU

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

10

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

32

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

66

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

30

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

4

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

47

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

17

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

7

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

21

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

2

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

41

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

57

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

20

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

30

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

2

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

9

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

22

XCSE

Genmab A/S

26/06/2024

4:35:44 PM

1,795.0000

2

XCSE

Genmab A/S

26/06/2024

4:35:45 PM

1,795.0000

40

XCSE

Genmab A/S

26/06/2024

4:35:45 PM

1,795.0000

23

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,795.0000

84

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,795.0000

14

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,795.0000

56

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,795.0000

42

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,795.0000

11

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

23

CEUX

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

17

CEUX

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

6

CEUX

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

17

CEUX

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

6

AQEU

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

24

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

43

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

21

CEUX

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

6

AQEU

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

24

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

11

XCSE

Genmab A/S

26/06/2024

4:35:46 PM

1,794.5000

6

AQEU

Genmab A/S

26/06/2024

4:35:47 PM

1,794.5000

29

XCSE

Genmab A/S

26/06/2024

4:35:47 PM

1,794.5000

8

XCSE

Genmab A/S

26/06/2024

4:35:47 PM

1,794.5000

16

XCSE

Genmab A/S

26/06/2024

4:35:47 PM

1,794.5000

2

CEUX

Genmab A/S

26/06/2024

4:36:16 PM

1,792.5000

7

CEUX

186


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for June 24 – June 26, 2024

Graphic

Genmab A/S

26/06/2024

4:36:16 PM

1,792.5000

35

XCSE

Genmab A/S

26/06/2024

4:36:16 PM

1,792.5000

11

XCSE

Genmab A/S

26/06/2024

4:36:16 PM

1,792.5000

26

XCSE

Genmab A/S

26/06/2024

4:36:16 PM

1,792.5000

6

CEUX

Genmab A/S

26/06/2024

4:36:16 PM

1,792.5000

10

CEUX

Genmab A/S

26/06/2024

4:36:16 PM

1,792.5000

4

AQEU

Genmab A/S

26/06/2024

4:36:17 PM

1,792.5000

23

CEUX

Genmab A/S

26/06/2024

4:36:17 PM

1,792.5000

46

XCSE

Genmab A/S

26/06/2024

4:36:17 PM

1,792.5000

26

XCSE

Genmab A/S

26/06/2024

4:36:17 PM

1,792.5000

23

CEUX

Genmab A/S

26/06/2024

4:36:17 PM

1,792.5000

4

AQEU

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

18

XCSE

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

15

XCSE

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

8

CEUX

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

9

CEUX

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

4

AQEU

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

4

AQEU

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

4

AQEU

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

2

AQEU

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

2

AQEU

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

11

XCSE

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

10

XCSE

Genmab A/S

26/06/2024

4:36:18 PM

1,792.5000

15

AQEU

Genmab A/S

26/06/2024

4:37:18 PM

1,792.0000

40

XCSE

Genmab A/S

26/06/2024

4:37:18 PM

1,792.0000

47

XCSE

Genmab A/S

26/06/2024

4:37:18 PM

1,792.0000

37

XCSE

Genmab A/S

26/06/2024

4:37:18 PM

1,792.0000

41

XCSE

Genmab A/S

26/06/2024

4:37:18 PM

1,792.0000

53

CEUX

Genmab A/S

26/06/2024

4:37:18 PM

1,792.0000

32

XCSE

Genmab A/S

26/06/2024

4:37:23 PM

1,791.5000

17

CEUX

Genmab A/S

26/06/2024

4:43:44 PM

1,787.5000

16

CEUX

Genmab A/S

26/06/2024

4:43:45 PM

1,787.5000

15

CEUX

Genmab A/S

26/06/2024

4:43:46 PM

1,787.5000

8

CEUX

Genmab A/S

26/06/2024

4:43:46 PM

1,787.5000

22

CEUX

Genmab A/S

26/06/2024

4:43:47 PM

1,787.5000

3

CEUX

Genmab A/S

26/06/2024

4:43:48 PM

1,787.5000

7

CEUX

Genmab A/S

26/06/2024

4:45:16 PM

1,789.5000

1

CEUX

Genmab A/S

26/06/2024

4:46:14 PM

1,790.0000

2

AQEU

Genmab A/S

26/06/2024

4:46:14 PM

1,790.0000

18

AQEU

Genmab A/S

26/06/2024

4:46:50 PM

1,792.0000

12

CEUX

Genmab A/S

26/06/2024

4:46:56 PM

1,792.0000

52

XCSE

187