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 APRIL 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333-262970 and 333-277273) and to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.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: APRIL 22, 2024


EXHIBIT INDEX

O

Exhibit

Description of Exhibit

99.1  

Company Announcement Dated April 22, 2024: Transactions in Connection with Share Buy-back Program  

99.1(a)  

Appendix: Share Buy-Back Program Transactions April 15 to 19, 2024  


Exhibit 99.1

Graphic

Transactions in Connection with Share Buy-back Program Genmab

Company Announcement

COPENHAGEN, Denmark; April 22, 2024 – Genmab A/S (Nasdaq: GMAB). 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 is expected to be completed no later than December 16, 2024.

The following transactions were executed under the program from April 15, 2024 to April 19, 2024:

Accumulated through
last announcement

Trading Platform

No. of shares

Average price (DKK)

Total value (DKK)

 

269,334

 

555,043,478.37

April 15, 2024

XCSE

9,536

2,063.63

 

 

CEUX

7,543

2,063.40

 

 

AQEU

898

2,068.36

 

 

TQEX

1,194

2,065.25

 

 

Total

19,171

2,063.86

39,566,271.56

April 16, 2024

XCSE

13,416

2,055.49

 

 

CEUX

7,850

2,057.43

 

 

AQEU

993

2,054.14

 

 

TQEX

1,482

2,057.99

 

 

Total

23,741

2,056.23

48,816,980.17

April 17, 2024

XCSE

15,649

2,019.12

 

 

CEUX

9,532

2,017.27

 

 

AQEU

1,319

2,015.48

 

 

TQEX

1,539

2,019.00

 

 

Total

28,039

2,018.31

55,591,452.97

April 18, 2024

XCSE

21,864

1,995.08

 

 

CEUX

10,326

1,995.12

 

 

AQEU

1,569

1,994.73

 

 

TQEX

1,956

1,995.08

 

 

Total

35,715

1,995.08

71,254,196.48

April 19, 2024

XCSE

19,288

1,985.97

 

 

CEUX

10,117

1,980.66

 

 

AQEU

1,584

1,986.60

 

 

TQEX

1,712

1,984.02

 

 

Total

32,701

1,984.26

64,887,132.57

Total

 

139,367

 

281,116,033.75

Accumulated under the program

 

408,701

 

836,159,512.12


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

Genmab A/S

Tel: +45 7020 2728

Company Announcement no. 30

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

Transactions in Connection with Share Buy-back Program Genmab

Following these transactions, Genmab holds 1,269,043 shares as treasury shares, corresponding to 1.92% 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.

About Genmab
Genmab is an international biotechnology company with a core purpose guiding its unstoppable team to strive towards improving the lives of patients through 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, next-generation immune checkpoint modulators, effector function enhanced antibodies, and antibody-drug conjugates. To help develop and deliver novel antibody therapies to patients, Genmab has formed 20+ strategic partnerships with biotechnology and pharmaceutical companies. 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 locations in Utrecht, the Netherlands, Princeton, New Jersey, U.S., and Tokyo, Japan. 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 pre-clinical 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. 30

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 April15, – April 19, 2024

Graphic

Issuer

Date

Time CEST

Price (DKK)

Quantity

Venue

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

23

XCSE

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

23

XCSE

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

16

XCSE

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

23

XCSE

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

9

XCSE

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

20

CEUX

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

6

CEUX

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

4

TQEX

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

4

TQEX

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

4

TQEX

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

4

TQEX

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

15

CEUX

GENMAB A/S

15/04/2024

9:01:58 AM

2,089.00

18

CEUX

GENMAB A/S

15/04/2024

9:02:53 AM

2,089.00

37

AQEU

GENMAB A/S

15/04/2024

9:07:21 AM

2,099.00

7

CEUX

GENMAB A/S

15/04/2024

9:07:21 AM

2,099.00

36

CEUX

GENMAB A/S

15/04/2024

9:08:23 AM

2,098.00

50

XCSE

GENMAB A/S

15/04/2024

9:08:23 AM

2,097.00

18

AQEU

GENMAB A/S

15/04/2024

9:08:23 AM

2,097.00

30

AQEU

GENMAB A/S

15/04/2024

9:12:38 AM

2,081.00

36

XCSE

GENMAB A/S

15/04/2024

9:14:55 AM

2,084.00

40

XCSE

GENMAB A/S

15/04/2024

9:14:56 AM

2,084.00

35

CEUX

GENMAB A/S

15/04/2024

9:15:20 AM

2,083.00

36

CEUX

GENMAB A/S

15/04/2024

9:17:38 AM

2,087.00

9

XCSE

GENMAB A/S

15/04/2024

9:17:38 AM

2,087.00

32

XCSE

GENMAB A/S

15/04/2024

9:17:38 AM

2,087.00

39

XCSE

GENMAB A/S

15/04/2024

9:24:20 AM

2,087.00

74

XCSE

GENMAB A/S

15/04/2024

9:24:22 AM

2,085.00

53

AQEU

GENMAB A/S

15/04/2024

9:24:22 AM

2,085.00

16

AQEU

GENMAB A/S

15/04/2024

9:25:11 AM

2,084.00

35

CEUX

GENMAB A/S

15/04/2024

9:25:11 AM

2,083.00

56

XCSE

GENMAB A/S

15/04/2024

9:25:11 AM

2,083.00

8

XCSE

GENMAB A/S

15/04/2024

9:25:11 AM

2,083.00

27

XCSE

GENMAB A/S

15/04/2024

9:25:12 AM

2,082.00

47

CEUX

GENMAB A/S

15/04/2024

9:25:12 AM

2,082.00

54

TQEX

GENMAB A/S

15/04/2024

9:30:07 AM

2,067.00

38

XCSE

GENMAB A/S

15/04/2024

9:30:09 AM

2,066.00

1

CEUX

GENMAB A/S

15/04/2024

9:35:31 AM

2,065.00

55

XCSE

1


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

9:39:59 AM

2,069.00

36

AQEU

GENMAB A/S

15/04/2024

9:40:29 AM

2,067.00

14

CEUX

GENMAB A/S

15/04/2024

9:40:29 AM

2,067.00

41

CEUX

GENMAB A/S

15/04/2024

9:40:29 AM

2,066.00

54

CEUX

GENMAB A/S

15/04/2024

9:40:29 AM

2,065.00

58

XCSE

GENMAB A/S

15/04/2024

9:40:29 AM

2,065.00

28

XCSE

GENMAB A/S

15/04/2024

9:40:29 AM

2,065.00

15

XCSE

GENMAB A/S

15/04/2024

9:40:29 AM

2,065.00

1

XCSE

GENMAB A/S

15/04/2024

9:47:11 AM

2,066.00

56

CEUX

GENMAB A/S

15/04/2024

9:52:33 AM

2,070.00

30

XCSE

GENMAB A/S

15/04/2024

9:52:33 AM

2,070.00

11

XCSE

GENMAB A/S

15/04/2024

9:52:33 AM

2,069.00

43

TQEX

GENMAB A/S

15/04/2024

9:52:33 AM

2,069.00

18

TQEX

GENMAB A/S

15/04/2024

9:54:26 AM

2,068.00

42

CEUX

GENMAB A/S

15/04/2024

9:54:26 AM

2,068.00

19

CEUX

GENMAB A/S

15/04/2024

9:57:09 AM

2,065.00

36

CEUX

GENMAB A/S

15/04/2024

9:58:43 AM

2,063.00

24

CEUX

GENMAB A/S

15/04/2024

9:58:43 AM

2,063.00

12

CEUX

GENMAB A/S

15/04/2024

9:58:45 AM

2,063.00

26

XCSE

GENMAB A/S

15/04/2024

10:01:45 AM

2,062.00

11

CEUX

GENMAB A/S

15/04/2024

10:01:45 AM

2,062.00

8

CEUX

GENMAB A/S

15/04/2024

10:01:45 AM

2,062.00

26

CEUX

GENMAB A/S

15/04/2024

10:03:24 AM

2,063.00

17

CEUX

GENMAB A/S

15/04/2024

10:03:24 AM

2,063.00

62

CEUX

GENMAB A/S

15/04/2024

10:05:37 AM

2,060.00

13

CEUX

GENMAB A/S

15/04/2024

10:05:37 AM

2,060.00

31

CEUX

GENMAB A/S

15/04/2024

10:05:38 AM

2,059.00

43

XCSE

GENMAB A/S

15/04/2024

10:05:38 AM

2,059.00

41

XCSE

GENMAB A/S

15/04/2024

10:12:59 AM

2,053.00

35

XCSE

GENMAB A/S

15/04/2024

10:12:59 AM

2,053.00

12

CEUX

GENMAB A/S

15/04/2024

10:12:59 AM

2,053.00

27

CEUX

GENMAB A/S

15/04/2024

10:12:59 AM

2,053.00

36

CEUX

GENMAB A/S

15/04/2024

10:17:20 AM

2,052.00

49

XCSE

GENMAB A/S

15/04/2024

10:20:25 AM

2,051.00

30

CEUX

GENMAB A/S

15/04/2024

10:20:25 AM

2,051.00

30

CEUX

GENMAB A/S

15/04/2024

10:20:25 AM

2,051.00

26

CEUX

GENMAB A/S

15/04/2024

10:21:12 AM

2,046.00

40

CEUX

GENMAB A/S

15/04/2024

10:27:14 AM

2,051.00

44

CEUX

GENMAB A/S

15/04/2024

10:29:37 AM

2,051.00

43

XCSE

2


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

10:34:01 AM

2,054.00

46

CEUX

GENMAB A/S

15/04/2024

10:38:06 AM

2,057.00

17

CEUX

GENMAB A/S

15/04/2024

10:38:06 AM

2,057.00

3

CEUX

GENMAB A/S

15/04/2024

10:38:06 AM

2,057.00

7

CEUX

GENMAB A/S

15/04/2024

10:38:06 AM

2,057.00

10

XCSE

GENMAB A/S

15/04/2024

10:38:52 AM

2,056.00

25

XCSE

GENMAB A/S

15/04/2024

10:38:52 AM

2,056.00

53

XCSE

GENMAB A/S

15/04/2024

10:38:52 AM

2,056.00

25

XCSE

GENMAB A/S

15/04/2024

10:38:52 AM

2,056.00

25

XCSE

GENMAB A/S

15/04/2024

10:38:52 AM

2,056.00

10

XCSE

GENMAB A/S

15/04/2024

10:44:56 AM

2,053.00

68

CEUX

GENMAB A/S

15/04/2024

10:49:31 AM

2,051.00

39

CEUX

GENMAB A/S

15/04/2024

10:49:31 AM

2,051.00

38

XCSE

GENMAB A/S

15/04/2024

10:55:29 AM

2,058.00

41

CEUX

GENMAB A/S

15/04/2024

10:55:29 AM

2,058.00

2

CEUX

GENMAB A/S

15/04/2024

10:58:50 AM

2,060.00

8

CEUX

GENMAB A/S

15/04/2024

10:58:50 AM

2,060.00

18

CEUX

GENMAB A/S

15/04/2024

10:58:50 AM

2,060.00

13

CEUX

GENMAB A/S

15/04/2024

10:59:37 AM

2,059.00

44

XCSE

GENMAB A/S

15/04/2024

11:01:17 AM

2,055.00

44

XCSE

GENMAB A/S

15/04/2024

11:01:17 AM

2,055.00

44

XCSE

GENMAB A/S

15/04/2024

11:01:18 AM

2,055.00

2

XCSE

GENMAB A/S

15/04/2024

11:09:19 AM

2,054.00

21

CEUX

GENMAB A/S

15/04/2024

11:09:19 AM

2,054.00

18

CEUX

GENMAB A/S

15/04/2024

11:09:19 AM

2,054.00

40

XCSE

GENMAB A/S

15/04/2024

11:10:24 AM

2,057.00

1

CEUX

GENMAB A/S

15/04/2024

11:10:24 AM

2,057.00

1

CEUX

GENMAB A/S

15/04/2024

11:11:28 AM

2,057.00

34

CEUX

GENMAB A/S

15/04/2024

11:13:48 AM

2,055.00

33

XCSE

GENMAB A/S

15/04/2024

11:13:48 AM

2,055.00

1

XCSE

GENMAB A/S

15/04/2024

11:16:33 AM

2,054.00

36

CEUX

GENMAB A/S

15/04/2024

11:20:52 AM

2,055.00

34

AQEU

GENMAB A/S

15/04/2024

11:20:52 AM

2,055.00

7

AQEU

GENMAB A/S

15/04/2024

11:23:30 AM

2,055.00

7

AQEU

GENMAB A/S

15/04/2024

11:23:30 AM

2,055.00

45

CEUX

GENMAB A/S

15/04/2024

11:23:30 AM

2,055.00

6

TQEX

GENMAB A/S

15/04/2024

11:23:30 AM

2,055.00

49

XCSE

GENMAB A/S

15/04/2024

11:23:30 AM

2,055.00

36

XCSE

GENMAB A/S

15/04/2024

11:23:30 AM

2,054.00

37

XCSE

3


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

11:31:06 AM

2,047.00

34

CEUX

GENMAB A/S

15/04/2024

11:31:07 AM

2,046.00

34

XCSE

GENMAB A/S

15/04/2024

11:31:07 AM

2,046.00

1

XCSE

GENMAB A/S

15/04/2024

11:31:07 AM

2,046.00

34

XCSE

GENMAB A/S

15/04/2024

11:36:32 AM

2,053.00

7

AQEU

GENMAB A/S

15/04/2024

11:36:32 AM

2,053.00

49

CEUX

GENMAB A/S

15/04/2024

11:36:32 AM

2,053.00

8

TQEX

GENMAB A/S

15/04/2024

11:36:32 AM

2,053.00

54

XCSE

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

27

XCSE

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

49

XCSE

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

7

AQEU

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

44

CEUX

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

6

TQEX

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

27

XCSE

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

41

XCSE

GENMAB A/S

15/04/2024

11:41:28 AM

2,051.00

11

XCSE

GENMAB A/S

15/04/2024

11:46:44 AM

2,057.00

17

XCSE

GENMAB A/S

15/04/2024

11:46:44 AM

2,057.00

23

XCSE

GENMAB A/S

15/04/2024

11:46:44 AM

2,057.00

2

XCSE

GENMAB A/S

15/04/2024

11:47:43 AM

2,057.00

30

XCSE

GENMAB A/S

15/04/2024

11:47:43 AM

2,057.00

8

XCSE

GENMAB A/S

15/04/2024

11:48:26 AM

2,055.00

8

XCSE

GENMAB A/S

15/04/2024

11:48:26 AM

2,055.00

8

XCSE

GENMAB A/S

15/04/2024

11:48:26 AM

2,055.00

2

CEUX

GENMAB A/S

15/04/2024

11:48:26 AM

2,055.00

4

TQEX

GENMAB A/S

15/04/2024

11:48:26 AM

2,055.00

7

CEUX

GENMAB A/S

15/04/2024

11:50:17 AM

2,061.00

17

CEUX

GENMAB A/S

15/04/2024

11:50:18 AM

2,060.00

61

XCSE

GENMAB A/S

15/04/2024

11:50:18 AM

2,060.00

11

XCSE

GENMAB A/S

15/04/2024

11:50:18 AM

2,060.00

33

XCSE

GENMAB A/S

15/04/2024

11:50:18 AM

2,060.00

34

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

20

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

27

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

20

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

10

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

10

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

14

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

10

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

3

AQEU

4


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

10

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

10

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

2

TQEX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

2

TQEX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

2

TQEX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

4

TQEX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

10

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

37

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

30

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

33

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

17

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,058.00

2

XCSE

GENMAB A/S

15/04/2024

11:51:52 AM

2,057.00

42

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,057.00

15

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,057.00

27

CEUX

GENMAB A/S

15/04/2024

11:51:52 AM

2,057.00

1

CEUX

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

36

CEUX

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

36

CEUX

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

39

XCSE

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

36

CEUX

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

36

CEUX

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

29

CEUX

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

39

XCSE

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

39

XCSE

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

39

XCSE

GENMAB A/S

15/04/2024

12:01:49 PM

2,060.00

36

XCSE

GENMAB A/S

15/04/2024

12:06:23 PM

2,060.00

11

AQEU

GENMAB A/S

15/04/2024

12:06:23 PM

2,060.00

72

CEUX

GENMAB A/S

15/04/2024

12:06:23 PM

2,060.00

80

XCSE

GENMAB A/S

15/04/2024

12:06:23 PM

2,059.00

28

CEUX

GENMAB A/S

15/04/2024

12:06:23 PM

2,059.00

52

CEUX

GENMAB A/S

15/04/2024

12:17:05 PM

2,063.00

27

XCSE

GENMAB A/S

15/04/2024

12:17:05 PM

2,063.00

9

XCSE

GENMAB A/S

15/04/2024

12:18:07 PM

2,062.00

39

CEUX

GENMAB A/S

15/04/2024

12:18:59 PM

2,062.00

30

XCSE

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

84

TQEX

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

7

AQEU

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

10

AQEU

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

68

CEUX

5


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

10

TQEX

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

38

XCSE

GENMAB A/S

15/04/2024

12:19:11 PM

2,060.00

11

XCSE

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

29

XCSE

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

16

XCSE

GENMAB A/S

15/04/2024

12:19:11 PM

2,061.00

30

XCSE

GENMAB A/S

15/04/2024

12:28:49 PM

2,061.00

4

CEUX

GENMAB A/S

15/04/2024

12:28:49 PM

2,061.00

3

CEUX

GENMAB A/S

15/04/2024

12:28:49 PM

2,061.00

1

XCSE

GENMAB A/S

15/04/2024

12:28:49 PM

2,061.00

57

CEUX

GENMAB A/S

15/04/2024

12:28:49 PM

2,061.00

15

CEUX

GENMAB A/S

15/04/2024

12:28:49 PM

2,060.00

9

TQEX

GENMAB A/S

15/04/2024

12:28:49 PM

2,060.00

24

CEUX

GENMAB A/S

15/04/2024

12:28:49 PM

2,060.00

13

XCSE

GENMAB A/S

15/04/2024

12:28:49 PM

2,060.00

32

XCSE

GENMAB A/S

15/04/2024

12:28:49 PM

2,060.00

21

XCSE

GENMAB A/S

15/04/2024

12:28:49 PM

2,060.00

33

CEUX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

30

CEUX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

67

CEUX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

30

CEUX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

30

CEUX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

5

TQEX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

11

TQEX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

5

TQEX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

11

TQEX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

5

TQEX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

11

TQEX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

17

CEUX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

3

TQEX

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

22

XCSE

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

11

XCSE

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

75

XCSE

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

33

XCSE

GENMAB A/S

15/04/2024

12:32:35 PM

2,060.00

51

XCSE

GENMAB A/S

15/04/2024

12:38:19 PM

2,056.00

7

AQEU

GENMAB A/S

15/04/2024

12:38:19 PM

2,056.00

49

CEUX

GENMAB A/S

15/04/2024

12:38:19 PM

2,056.00

8

TQEX

GENMAB A/S

15/04/2024

12:38:19 PM

2,056.00

11

XCSE

GENMAB A/S

15/04/2024

12:38:19 PM

2,056.00

44

XCSE

6


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

12:38:20 PM

2,055.00

1

CEUX

GENMAB A/S

15/04/2024

12:38:22 PM

2,055.00

12

CEUX

GENMAB A/S

15/04/2024

12:38:22 PM

2,055.00

56

CEUX

GENMAB A/S

15/04/2024

12:46:23 PM

2,059.00

18

XCSE

GENMAB A/S

15/04/2024

12:46:23 PM

2,059.00

97

XCSE

GENMAB A/S

15/04/2024

12:46:23 PM

2,059.00

3

AQEU

GENMAB A/S

15/04/2024

12:46:23 PM

2,059.00

12

AQEU

GENMAB A/S

15/04/2024

12:46:23 PM

2,059.00

104

CEUX

GENMAB A/S

15/04/2024

12:46:23 PM

2,059.00

10

TQEX

GENMAB A/S

15/04/2024

12:46:23 PM

2,059.00

6

TQEX

GENMAB A/S

15/04/2024

12:51:09 PM

2,059.00

39

CEUX

GENMAB A/S

15/04/2024

12:51:09 PM

2,059.00

26

CEUX

GENMAB A/S

15/04/2024

12:51:09 PM

2,059.00

20

CEUX

GENMAB A/S

15/04/2024

12:51:52 PM

2,058.00

85

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

26

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

23

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

3

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

30

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

11

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

19

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

3

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

1

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

3

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

11

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

12

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

11

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

23

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

23

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

12

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

11

XCSE

GENMAB A/S

15/04/2024

12:55:05 PM

2,056.00

2

XCSE

GENMAB A/S

15/04/2024

1:05:37 PM

2,059.00

7

CEUX

GENMAB A/S

15/04/2024

1:07:31 PM

2,060.00

11

XCSE

GENMAB A/S

15/04/2024

1:07:31 PM

2,060.00

11

XCSE

GENMAB A/S

15/04/2024

1:07:32 PM

2,060.00

1

XCSE

GENMAB A/S

15/04/2024

1:08:41 PM

2,061.00

25

XCSE

GENMAB A/S

15/04/2024

1:08:41 PM

2,061.00

159

XCSE

GENMAB A/S

15/04/2024

1:08:42 PM

2,061.00

10

AQEU

GENMAB A/S

15/04/2024

1:08:42 PM

2,061.00

13

AQEU

7


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

1:08:42 PM

2,061.00

18

CEUX

GENMAB A/S

15/04/2024

1:08:42 PM

2,061.00

69

CEUX

GENMAB A/S

15/04/2024

1:08:42 PM

2,061.00

78

CEUX

GENMAB A/S

15/04/2024

1:08:42 PM

2,061.00

26

TQEX

GENMAB A/S

15/04/2024

1:17:38 PM

2,064.00

34

XCSE

GENMAB A/S

15/04/2024

1:17:38 PM

2,064.00

7

XCSE

GENMAB A/S

15/04/2024

1:17:38 PM

2,064.00

4

XCSE

GENMAB A/S

15/04/2024

1:17:38 PM

2,064.00

33

XCSE

GENMAB A/S

15/04/2024

1:17:51 PM

2,064.00

37

XCSE

GENMAB A/S

15/04/2024

1:17:51 PM

2,064.00

1

XCSE

GENMAB A/S

15/04/2024

1:18:26 PM

2,064.00

4

XCSE

GENMAB A/S

15/04/2024

1:18:26 PM

2,064.00

1

XCSE

GENMAB A/S

15/04/2024

1:18:26 PM

2,064.00

33

XCSE

GENMAB A/S

15/04/2024

1:18:26 PM

2,064.00

1

XCSE

GENMAB A/S

15/04/2024

1:18:50 PM

2,063.00

40

XCSE

GENMAB A/S

15/04/2024

1:18:50 PM

2,063.00

55

XCSE

GENMAB A/S

15/04/2024

1:18:50 PM

2,063.00

74

CEUX

GENMAB A/S

15/04/2024

1:18:50 PM

2,063.00

12

CEUX

GENMAB A/S

15/04/2024

1:18:50 PM

2,063.00

8

TQEX

GENMAB A/S

15/04/2024

1:18:50 PM

2,063.00

6

TQEX

GENMAB A/S

15/04/2024

1:19:45 PM

2,064.00

38

AQEU

GENMAB A/S

15/04/2024

1:25:28 PM

2,064.00

38

XCSE

GENMAB A/S

15/04/2024

1:26:30 PM

2,063.00

7

CEUX

GENMAB A/S

15/04/2024

1:26:30 PM

2,063.00

15

CEUX

GENMAB A/S

15/04/2024

1:27:03 PM

2,064.00

1

TQEX

GENMAB A/S

15/04/2024

1:27:03 PM

2,064.00

8

TQEX

GENMAB A/S

15/04/2024

1:27:03 PM

2,064.00

28

TQEX

GENMAB A/S

15/04/2024

1:27:56 PM

2,064.00

41

XCSE

GENMAB A/S

15/04/2024

1:27:56 PM

2,063.00

19

AQEU

GENMAB A/S

15/04/2024

1:27:56 PM

2,063.00

75

CEUX

GENMAB A/S

15/04/2024

1:27:56 PM

2,063.00

37

CEUX

GENMAB A/S

15/04/2024

1:27:56 PM

2,063.00

19

TQEX

GENMAB A/S

15/04/2024

1:27:56 PM

2,063.00

1

TQEX

GENMAB A/S

15/04/2024

1:27:56 PM

2,063.00

83

XCSE

GENMAB A/S

15/04/2024

1:27:56 PM

2,063.00

65

XCSE

GENMAB A/S

15/04/2024

1:31:07 PM

2,065.00

9

XCSE

GENMAB A/S

15/04/2024

1:31:40 PM

2,065.00

1

XCSE

GENMAB A/S

15/04/2024

1:36:33 PM

2,065.00

8

CEUX

GENMAB A/S

15/04/2024

1:36:33 PM

2,065.00

32

CEUX

8


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

1:36:33 PM

2,065.00

10

TQEX

GENMAB A/S

15/04/2024

1:38:48 PM

2,065.00

38

XCSE

GENMAB A/S

15/04/2024

1:39:51 PM

2,065.00

37

AQEU

GENMAB A/S

15/04/2024

1:40:48 PM

2,064.00

81

XCSE

GENMAB A/S

15/04/2024

1:40:48 PM

2,064.00

21

XCSE

GENMAB A/S

15/04/2024

1:40:48 PM

2,064.00

2

XCSE

GENMAB A/S

15/04/2024

1:40:48 PM

2,064.00

4

XCSE

GENMAB A/S

15/04/2024

1:40:48 PM

2,064.00

2

XCSE

GENMAB A/S

15/04/2024

1:40:49 PM

2,064.00

27

XCSE

GENMAB A/S

15/04/2024

1:40:49 PM

2,064.00

27

XCSE

GENMAB A/S

15/04/2024

1:40:49 PM

2,064.00

27

XCSE

GENMAB A/S

15/04/2024

1:40:49 PM

2,064.00

13

XCSE

GENMAB A/S

15/04/2024

1:47:21 PM

2,066.00

30

XCSE

GENMAB A/S

15/04/2024

1:47:21 PM

2,066.00

6

TQEX

GENMAB A/S

15/04/2024

1:48:44 PM

2,066.00

33

XCSE

GENMAB A/S

15/04/2024

1:48:44 PM

2,066.00

96

XCSE

GENMAB A/S

15/04/2024

1:48:44 PM

2,066.00

17

AQEU

GENMAB A/S

15/04/2024

1:48:44 PM

2,066.00

62

CEUX

GENMAB A/S

15/04/2024

1:48:44 PM

2,066.00

54

CEUX

GENMAB A/S

15/04/2024

1:48:44 PM

2,066.00

9

TQEX

GENMAB A/S

15/04/2024

1:48:44 PM

2,066.00

9

TQEX

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

25

XCSE

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

40

XCSE

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

26

XCSE

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

16

XCSE

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

24

CEUX

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

14

CEUX

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

10

CEUX

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

4

CEUX

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

13

CEUX

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

10

XCSE

GENMAB A/S

15/04/2024

1:55:28 PM

2,063.00

43

XCSE

GENMAB A/S

15/04/2024

2:03:23 PM

2,064.00

41

XCSE

GENMAB A/S

15/04/2024

2:04:48 PM

2,064.00

3

XCSE

GENMAB A/S

15/04/2024

2:05:16 PM

2,064.00

35

XCSE

GENMAB A/S

15/04/2024

2:06:59 PM

2,065.00

76

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

1

AQEU

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

9


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

9

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

1

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

9

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

1

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

9

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

1

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

9

XCSE

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

9

XCSE

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:07:08 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

AQEU

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

AQEU

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

AQEU

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

AQEU

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

AQEU

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

AQEU

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

22

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

22

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

22

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

22

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

9

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

1

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

22

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

11

CEUX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

10

TQEX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

7

TQEX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

3

TQEX

10


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

1

TQEX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

7

TQEX

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

7

AQEU

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

23

XCSE

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

8

XCSE

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

15

XCSE

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

11

XCSE

GENMAB A/S

15/04/2024

2:10:49 PM

2,064.00

7

AQEU

GENMAB A/S

15/04/2024

2:15:05 PM

2,062.00

46

XCSE

GENMAB A/S

15/04/2024

2:21:44 PM

2,065.00

8

TQEX

GENMAB A/S

15/04/2024

2:21:44 PM

2,065.00

7

TQEX

GENMAB A/S

15/04/2024

2:21:44 PM

2,065.00

14

TQEX

GENMAB A/S

15/04/2024

2:21:44 PM

2,065.00

6

XCSE

GENMAB A/S

15/04/2024

2:22:43 PM

2,065.00

7

TQEX

GENMAB A/S

15/04/2024

2:22:43 PM

2,065.00

3

XCSE

GENMAB A/S

15/04/2024

2:22:43 PM

2,065.00

28

XCSE

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

21

AQEU

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

75

CEUX

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

75

CEUX

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

23

TQEX

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

53

XCSE

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

67

XCSE

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

42

XCSE

GENMAB A/S

15/04/2024

2:23:09 PM

2,064.00

4

XCSE

GENMAB A/S

15/04/2024

2:29:26 PM

2,062.00

20

XCSE

GENMAB A/S

15/04/2024

2:29:26 PM

2,062.00

69

XCSE

GENMAB A/S

15/04/2024

2:30:03 PM

2,059.00

28

XCSE

GENMAB A/S

15/04/2024

2:33:43 PM

2,063.00

45

XCSE

GENMAB A/S

15/04/2024

2:33:43 PM

2,063.00

41

CEUX

GENMAB A/S

15/04/2024

2:33:43 PM

2,063.00

6

TQEX

GENMAB A/S

15/04/2024

2:33:43 PM

2,063.00

6

XCSE

GENMAB A/S

15/04/2024

2:37:05 PM

2,066.00

91

XCSE

GENMAB A/S

15/04/2024

2:40:23 PM

2,065.00

74

XCSE

GENMAB A/S

15/04/2024

2:40:23 PM

2,065.00

3

TQEX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

2

AQEU

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

6

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

16

CEUX

11


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

7

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

16

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

1

TQEX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

17

XCSE

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

4

XCSE

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

13

XCSE

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

11

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

13

XCSE

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

16

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

3

AQEU

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

16

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

6

CEUX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:42:17 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

2:44:00 PM

2,065.00

14

CEUX

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

17

AQEU

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

114

CEUX

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

3

CEUX

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

2

CEUX

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

18

TQEX

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

43

XCSE

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

75

XCSE

GENMAB A/S

15/04/2024

2:45:59 PM

2,065.00

15

XCSE

GENMAB A/S

15/04/2024

2:55:51 PM

2,064.00

54

XCSE

GENMAB A/S

15/04/2024

2:55:51 PM

2,064.00

18

XCSE

GENMAB A/S

15/04/2024

2:56:44 PM

2,064.00

39

XCSE

GENMAB A/S

15/04/2024

2:57:33 PM

2,064.00

15

CEUX

GENMAB A/S

15/04/2024

2:57:33 PM

2,064.00

14

CEUX

GENMAB A/S

15/04/2024

2:57:33 PM

2,064.00

8

XCSE

GENMAB A/S

15/04/2024

2:58:34 PM

2,064.00

35

XCSE

GENMAB A/S

15/04/2024

2:59:18 PM

2,064.00

16

CEUX

GENMAB A/S

15/04/2024

2:59:18 PM

2,064.00

10

CEUX

GENMAB A/S

15/04/2024

2:59:18 PM

2,064.00

16

XCSE

GENMAB A/S

15/04/2024

3:00:20 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

3:00:20 PM

2,064.00

23

XCSE

GENMAB A/S

15/04/2024

3:00:24 PM

2,063.00

2

XCSE

12


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

3:01:24 PM

2,064.00

38

CEUX

GENMAB A/S

15/04/2024

3:02:12 PM

2,064.00

11

CEUX

GENMAB A/S

15/04/2024

3:02:12 PM

2,064.00

19

CEUX

GENMAB A/S

15/04/2024

3:02:12 PM

2,064.00

5

CEUX

GENMAB A/S

15/04/2024

3:03:06 PM

2,064.00

14

CEUX

GENMAB A/S

15/04/2024

3:03:06 PM

2,064.00

16

CEUX

GENMAB A/S

15/04/2024

3:03:06 PM

2,064.00

9

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

46

CEUX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

7

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

1

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

7

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

49

XCSE

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

50

XCSE

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

7

AQEU

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

46

CEUX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

8

CEUX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

7

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

2

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

7

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

1

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

7

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

1

TQEX

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

1

XCSE

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

6

XCSE

GENMAB A/S

15/04/2024

3:04:00 PM

2,063.00

31

XCSE

GENMAB A/S

15/04/2024

3:04:06 PM

2,062.00

48

XCSE

GENMAB A/S

15/04/2024

3:04:06 PM

2,062.00

48

XCSE

GENMAB A/S

15/04/2024

3:04:06 PM

2,062.00

7

XCSE

GENMAB A/S

15/04/2024

3:11:14 PM

2,061.00

1

TQEX

GENMAB A/S

15/04/2024

3:11:14 PM

2,061.00

10

CEUX

GENMAB A/S

15/04/2024

3:11:14 PM

2,061.00

3

TQEX

GENMAB A/S

15/04/2024

3:11:14 PM

2,061.00

10

XCSE

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

10

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

10

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

10

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

10

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

5

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

4

TQEX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

10

XCSE

13


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

80

XCSE

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

10

XCSE

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

2

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

4

TQEX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

4

TQEX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

25

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

25

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

25

CEUX

GENMAB A/S

15/04/2024

3:12:21 PM

2,061.00

18

CEUX

GENMAB A/S

15/04/2024

3:17:23 PM

2,060.00

23

XCSE

GENMAB A/S

15/04/2024

3:17:23 PM

2,060.00

54

XCSE

GENMAB A/S

15/04/2024

3:17:23 PM

2,060.00

10

AQEU

GENMAB A/S

15/04/2024

3:17:23 PM

2,060.00

69

CEUX

GENMAB A/S

15/04/2024

3:17:23 PM

2,060.00

55

CEUX

GENMAB A/S

15/04/2024

3:17:23 PM

2,060.00

29

CEUX

GENMAB A/S

15/04/2024

3:17:23 PM

2,060.00

11

TQEX

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

9

CEUX

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

4

TQEX

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

9

CEUX

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

4

TQEX

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

9

XCSE

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

9

XCSE

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

9

CEUX

GENMAB A/S

15/04/2024

3:22:08 PM

2,063.00

2

TQEX

GENMAB A/S

15/04/2024

3:24:19 PM

2,062.00

75

CEUX

GENMAB A/S

15/04/2024

3:24:19 PM

2,062.00

18

CEUX

GENMAB A/S

15/04/2024

3:24:19 PM

2,062.00

8

TQEX

GENMAB A/S

15/04/2024

3:24:19 PM

2,062.00

77

XCSE

GENMAB A/S

15/04/2024

3:24:19 PM

2,062.00

25

XCSE

GENMAB A/S

15/04/2024

3:24:19 PM

2,062.00

13

AQEU

GENMAB A/S

15/04/2024

3:24:19 PM

2,062.00

6

TQEX

GENMAB A/S

15/04/2024

3:26:15 PM

2,062.00

23

CEUX

GENMAB A/S

15/04/2024

3:26:15 PM

2,062.00

23

CEUX

GENMAB A/S

15/04/2024

3:26:16 PM

2,062.00

23

CEUX

GENMAB A/S

15/04/2024

3:26:16 PM

2,062.00

8

CEUX

GENMAB A/S

15/04/2024

3:26:16 PM

2,062.00

3

CEUX

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

10

CEUX

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

18

CEUX

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

30

CEUX

14


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

3

TQEX

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

3

TQEX

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

9

AQEU

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

3

TQEX

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

5

XCSE

GENMAB A/S

15/04/2024

3:27:52 PM

2,061.00

60

XCSE

GENMAB A/S

15/04/2024

3:33:49 PM

2,063.00

42

XCSE

GENMAB A/S

15/04/2024

3:33:49 PM

2,063.00

42

XCSE

GENMAB A/S

15/04/2024

3:33:49 PM

2,063.00

27

XCSE

GENMAB A/S

15/04/2024

3:33:49 PM

2,063.00

27

XCSE

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

7

AQEU

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

7

AQEU

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

23

CEUX

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

25

CEUX

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

48

CEUX

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

7

TQEX

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

8

TQEX

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

52

XCSE

GENMAB A/S

15/04/2024

3:39:56 PM

2,070.00

53

XCSE

GENMAB A/S

15/04/2024

3:42:08 PM

2,072.00

4

TQEX

GENMAB A/S

15/04/2024

3:42:08 PM

2,072.00

9

CEUX

GENMAB A/S

15/04/2024

3:42:08 PM

2,072.00

9

CEUX

GENMAB A/S

15/04/2024

3:42:08 PM

2,072.00

4

TQEX

GENMAB A/S

15/04/2024

3:42:08 PM

2,072.00

8

XCSE

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

105

XCSE

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

11

XCSE

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

68

CEUX

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

15

TQEX

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

23

CEUX

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

13

CEUX

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

15

AQEU

GENMAB A/S

15/04/2024

3:42:31 PM

2,071.00

1

TQEX

GENMAB A/S

15/04/2024

3:43:14 PM

2,070.00

2

CEUX

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

13

AQEU

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

88

CEUX

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

13

TQEX

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

13

TQEX

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

49

XCSE

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

48

XCSE

15


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

48

XCSE

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

28

XCSE

GENMAB A/S

15/04/2024

3:45:02 PM

2,070.00

88

CEUX

GENMAB A/S

15/04/2024

3:46:29 PM

2,066.00

3

AQEU

GENMAB A/S

15/04/2024

3:46:29 PM

2,066.00

14

AQEU

GENMAB A/S

15/04/2024

3:46:29 PM

2,066.00

3

CEUX

GENMAB A/S

15/04/2024

3:46:29 PM

2,066.00

4

CEUX

GENMAB A/S

15/04/2024

3:46:29 PM

2,066.00

11

CEUX

GENMAB A/S

15/04/2024

3:51:59 PM

2,064.00

4

CEUX

GENMAB A/S

15/04/2024

3:51:59 PM

2,064.00

11

CEUX

GENMAB A/S

15/04/2024

3:52:01 PM

2,064.00

1

CEUX

GENMAB A/S

15/04/2024

3:53:10 PM

2,066.00

35

CEUX

GENMAB A/S

15/04/2024

3:53:36 PM

2,066.00

26

CEUX

GENMAB A/S

15/04/2024

3:53:36 PM

2,066.00

14

CEUX

GENMAB A/S

15/04/2024

3:54:07 PM

2,066.00

20

CEUX

GENMAB A/S

15/04/2024

3:54:07 PM

2,066.00

5

CEUX

GENMAB A/S

15/04/2024

3:54:07 PM

2,066.00

9

CEUX

GENMAB A/S

15/04/2024

3:54:39 PM

2,066.00

5

AQEU

GENMAB A/S

15/04/2024

3:54:39 PM

2,066.00

11

CEUX

GENMAB A/S

15/04/2024

3:54:39 PM

2,066.00

7

CEUX

GENMAB A/S

15/04/2024

3:54:39 PM

2,066.00

16

CEUX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

9

AQEU

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

1

AQEU

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

13

AQEU

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

28

CEUX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

33

CEUX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

11

CEUX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

1

AQEU

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

13

AQEU

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

11

CEUX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

1

CEUX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

9

TQEX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

18

TQEX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

11

CEUX

GENMAB A/S

15/04/2024

3:54:55 PM

2,065.00

3

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

10

AQEU

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

14

AQEU

16


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

53

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

18

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

10

AQEU

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

41

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

30

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

12

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

11

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

11

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

1

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

11

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

1

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

5

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

79

XCSE

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

79

XCSE

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

12

XCSE

GENMAB A/S

15/04/2024

3:55:27 PM

2,066.00

4

AQEU

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

40

XCSE

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

36

XCSE

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

4

AQEU

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

50

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

11

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

7

AQEU

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

7

TQEX

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

10

CEUX

GENMAB A/S

15/04/2024

3:55:27 PM

2,065.00

1

CEUX

GENMAB A/S

15/04/2024

4:02:01 PM

2,066.00

9

AQEU

GENMAB A/S

15/04/2024

4:02:01 PM

2,066.00

60

CEUX

GENMAB A/S

15/04/2024

4:02:01 PM

2,066.00

9

TQEX

GENMAB A/S

15/04/2024

4:02:01 PM

2,066.00

51

XCSE

GENMAB A/S

15/04/2024

4:02:01 PM

2,066.00

67

XCSE

GENMAB A/S

15/04/2024

4:02:01 PM

2,066.00

51

XCSE

GENMAB A/S

15/04/2024

4:02:01 PM

2,066.00

46

XCSE

GENMAB A/S

15/04/2024

4:06:21 PM

2,061.00

60

CEUX

GENMAB A/S

15/04/2024

4:08:53 PM

2,064.00

11

CEUX

GENMAB A/S

15/04/2024

4:09:22 PM

2,064.00

15

AQEU

GENMAB A/S

15/04/2024

4:09:22 PM

2,064.00

11

CEUX

GENMAB A/S

15/04/2024

4:09:22 PM

2,064.00

83

CEUX

GENMAB A/S

15/04/2024

4:09:22 PM

2,064.00

16

TQEX

GENMAB A/S

15/04/2024

4:09:22 PM

2,064.00

117

XCSE

17


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

4:10:28 PM

2,064.00

75

XCSE

GENMAB A/S

15/04/2024

4:10:28 PM

2,064.00

10

AQEU

GENMAB A/S

15/04/2024

4:10:28 PM

2,064.00

68

CEUX

GENMAB A/S

15/04/2024

4:10:28 PM

2,064.00

7

TQEX

GENMAB A/S

15/04/2024

4:10:28 PM

2,064.00

3

TQEX

GENMAB A/S

15/04/2024

4:13:35 PM

2,063.00

6

XCSE

GENMAB A/S

15/04/2024

4:13:35 PM

2,063.00

14

XCSE

GENMAB A/S

15/04/2024

4:13:35 PM

2,063.00

23

XCSE

GENMAB A/S

15/04/2024

4:13:35 PM

2,063.00

11

XCSE

GENMAB A/S

15/04/2024

4:13:35 PM

2,063.00

11

XCSE

GENMAB A/S

15/04/2024

4:13:35 PM

2,063.00

4

XCSE

GENMAB A/S

15/04/2024

4:13:36 PM

2,063.00

13

XCSE

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

23

XCSE

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

14

XCSE

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

10

AQEU

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

14

AQEU

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

10

AQEU

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

4

AQEU

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

30

CEUX

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

38

CEUX

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

30

CEUX

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

6

CEUX

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

10

TQEX

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

38

XCSE

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

23

XCSE

GENMAB A/S

15/04/2024

4:16:04 PM

2,065.00

33

XCSE

GENMAB A/S

15/04/2024

4:18:22 PM

2,066.00

12

XCSE

GENMAB A/S

15/04/2024

4:18:23 PM

2,066.00

21

XCSE

GENMAB A/S

15/04/2024

4:18:23 PM

2,066.00

4

TQEX

GENMAB A/S

15/04/2024

4:18:55 PM

2,066.00

8

CEUX

GENMAB A/S

15/04/2024

4:18:55 PM

2,066.00

7

XCSE

GENMAB A/S

15/04/2024

4:19:57 PM

2,066.00

11

AQEU

GENMAB A/S

15/04/2024

4:19:57 PM

2,066.00

75

CEUX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

10

AQEU

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

6

AQEU

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

10

AQEU

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

4

AQEU

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

38

CEUX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

31

CEUX

18


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

12

CEUX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

11

TQEX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

11

TQEX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

11

TQEX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

77

XCSE

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

10

AQEU

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

1

AQEU

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

57

CEUX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

69

CEUX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

6

TQEX

GENMAB A/S

15/04/2024

4:21:11 PM

2,067.00

77

XCSE

GENMAB A/S

15/04/2024

4:21:12 PM

2,067.00

2

CEUX

GENMAB A/S

15/04/2024

4:22:32 PM

2,066.00

88

CEUX

GENMAB A/S

15/04/2024

4:22:32 PM

2,066.00

15

TQEX

GENMAB A/S

15/04/2024

4:22:32 PM

2,066.00

114

XCSE

GENMAB A/S

15/04/2024

4:25:23 PM

2,066.00

2

CEUX

GENMAB A/S

15/04/2024

4:26:17 PM

2,066.00

16

CEUX

GENMAB A/S

15/04/2024

4:27:25 PM

2,068.00

16

CEUX

GENMAB A/S

15/04/2024

4:27:25 PM

2,068.00

4

TQEX

GENMAB A/S

15/04/2024

4:27:31 PM

2,068.00

16

CEUX

GENMAB A/S

15/04/2024

4:27:31 PM

2,068.00

4

TQEX

GENMAB A/S

15/04/2024

4:27:31 PM

2,068.00

3

XCSE

GENMAB A/S

15/04/2024

4:27:31 PM

2,068.00

13

XCSE

GENMAB A/S

15/04/2024

4:27:31 PM

2,068.00

16

CEUX

GENMAB A/S

15/04/2024

4:27:31 PM

2,068.00

16

CEUX

GENMAB A/S

15/04/2024

4:29:37 PM

2,066.00

52

XCSE

GENMAB A/S

15/04/2024

4:29:37 PM

2,066.00

19

XCSE

GENMAB A/S

15/04/2024

4:29:37 PM

2,066.00

52

XCSE

GENMAB A/S

15/04/2024

4:29:37 PM

2,066.00

22

XCSE

GENMAB A/S

15/04/2024

4:29:37 PM

2,066.00

8

XCSE

GENMAB A/S

15/04/2024

4:29:40 PM

2,065.00

18

CEUX

GENMAB A/S

15/04/2024

4:29:40 PM

2,065.00

4

TQEX

GENMAB A/S

15/04/2024

4:29:40 PM

2,065.00

43

XCSE

GENMAB A/S

15/04/2024

4:29:40 PM

2,065.00

19

XCSE

GENMAB A/S

15/04/2024

4:33:53 PM

2,066.00

10

AQEU

GENMAB A/S

15/04/2024

4:33:53 PM

2,066.00

68

CEUX

GENMAB A/S

15/04/2024

4:33:53 PM

2,066.00

10

TQEX

GENMAB A/S

15/04/2024

4:33:53 PM

2,066.00

75

XCSE

GENMAB A/S

15/04/2024

4:35:14 PM

2,067.00

25

XCSE

19


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

4:35:14 PM

2,067.00

94

XCSE

GENMAB A/S

15/04/2024

4:35:14 PM

2,067.00

15

AQEU

GENMAB A/S

15/04/2024

4:35:14 PM

2,067.00

52

CEUX

GENMAB A/S

15/04/2024

4:35:14 PM

2,067.00

54

CEUX

GENMAB A/S

15/04/2024

4:35:14 PM

2,067.00

17

TQEX

GENMAB A/S

15/04/2024

4:37:10 PM

2,067.00

71

CEUX

GENMAB A/S

15/04/2024

4:37:10 PM

2,067.00

12

TQEX

GENMAB A/S

15/04/2024

4:37:10 PM

2,067.00

80

XCSE

GENMAB A/S

15/04/2024

4:40:01 PM

2,065.00

3

AQEU

GENMAB A/S

15/04/2024

4:40:01 PM

2,065.00

8

AQEU

GENMAB A/S

15/04/2024

4:40:01 PM

2,065.00

63

CEUX

GENMAB A/S

15/04/2024

4:40:01 PM

2,065.00

12

CEUX

GENMAB A/S

15/04/2024

4:40:01 PM

2,065.00

11

TQEX

GENMAB A/S

15/04/2024

4:40:01 PM

2,065.00

32

XCSE

GENMAB A/S

15/04/2024

4:40:01 PM

2,065.00

50

XCSE

GENMAB A/S

15/04/2024

4:44:41 PM

2,066.00

26

XCSE

GENMAB A/S

15/04/2024

4:44:53 PM

2,066.00

35

XCSE

GENMAB A/S

15/04/2024

4:45:05 PM

2,065.00

178

CEUX

GENMAB A/S

15/04/2024

4:45:05 PM

2,065.00

42

TQEX

GENMAB A/S

15/04/2024

4:45:05 PM

2,065.00

11

TQEX

GENMAB A/S

15/04/2024

4:45:23 PM

2,065.00

97

CEUX

GENMAB A/S

15/04/2024

4:45:23 PM

2,065.00

27

XCSE

GENMAB A/S

15/04/2024

4:45:23 PM

2,065.00

279

XCSE

GENMAB A/S

15/04/2024

4:45:23 PM

2,065.00

30

XCSE

GENMAB A/S

15/04/2024

4:45:23 PM

2,065.00

9

TQEX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

10

CEUX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

8

CEUX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

11

XCSE

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

11

XCSE

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

18

XCSE

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

2

CEUX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

10

CEUX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

8

CEUX

GENMAB A/S

15/04/2024

4:46:25 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:46:26 PM

2,064.00

16

XCSE

GENMAB A/S

15/04/2024

4:46:26 PM

2,064.00

10

XCSE

GENMAB A/S

15/04/2024

4:47:41 PM

2,064.00

15

CEUX

20


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

4:47:41 PM

2,064.00

1

CEUX

GENMAB A/S

15/04/2024

4:47:44 PM

2,064.00

15

XCSE

GENMAB A/S

15/04/2024

4:47:44 PM

2,064.00

55

XCSE

GENMAB A/S

15/04/2024

4:49:42 PM

2,065.00

108

XCSE

GENMAB A/S

15/04/2024

4:49:44 PM

2,065.00

57

XCSE

GENMAB A/S

15/04/2024

4:49:44 PM

2,065.00

39

XCSE

GENMAB A/S

15/04/2024

4:50:08 PM

2,065.00

16

CEUX

GENMAB A/S

15/04/2024

4:51:17 PM

2,064.00

16

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

1

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

1

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

1

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

36

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

3

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

10

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

1

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

1

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

1

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

21


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

1

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

13

CEUX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

4

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

7

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

5

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

7

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

12

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

9

XCSE

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

14

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

7

AQEU

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

7

TQEX

GENMAB A/S

15/04/2024

4:51:24 PM

2,064.00

19

XCSE

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

24

XCSE

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

25

XCSE

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

71

XCSE

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

7

XCSE

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

64

XCSE

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

24

XCSE

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

22

CEUX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

22

CEUX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

22

CEUX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

20

CEUX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

4

TQEX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

4

TQEX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

2

CEUX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

22

CEUX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

22

CEUX

GENMAB A/S

16/04/2024

9:00:18 AM

2,060.00

2

CEUX

GENMAB A/S

16/04/2024

9:00:24 AM

2,058.00

56

CEUX

GENMAB A/S

16/04/2024

9:00:24 AM

2,058.00

5

CEUX

GENMAB A/S

16/04/2024

9:00:24 AM

2,058.00

70

CEUX

GENMAB A/S

16/04/2024

9:00:24 AM

2,058.00

3

CEUX

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

22


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

21

CEUX

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

21

CEUX

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

2

CEUX

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

21

XCSE

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

7

XCSE

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

19

XCSE

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

30

XCSE

GENMAB A/S

16/04/2024

9:05:11 AM

2,058.00

15

XCSE

GENMAB A/S

16/04/2024

9:07:25 AM

2,058.00

57

TQEX

GENMAB A/S

16/04/2024

9:07:25 AM

2,058.00

35

TQEX

GENMAB A/S

16/04/2024

9:07:25 AM

2,058.00

89

TQEX

GENMAB A/S

16/04/2024

9:07:25 AM

2,058.00

44

XCSE

GENMAB A/S

16/04/2024

9:11:38 AM

2,059.00

71

TQEX

GENMAB A/S

16/04/2024

9:11:38 AM

2,059.00

4

TQEX

GENMAB A/S

16/04/2024

9:11:38 AM

2,059.00

79

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,061.00

47

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,061.00

2

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,061.00

7

AQEU

GENMAB A/S

16/04/2024

9:12:24 AM

2,061.00

45

CEUX

GENMAB A/S

16/04/2024

9:12:24 AM

2,061.00

6

TQEX

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

16

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

27

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

4

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

27

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

16

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

11

XCSE

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

26

TQEX

GENMAB A/S

16/04/2024

9:12:24 AM

2,060.00

12

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,061.00

7

AQEU

GENMAB A/S

16/04/2024

9:15:19 AM

2,061.00

44

CEUX

GENMAB A/S

16/04/2024

9:15:19 AM

2,061.00

2

TQEX

GENMAB A/S

16/04/2024

9:15:19 AM

2,061.00

51

TQEX

23


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

9:15:19 AM

2,061.00

6

TQEX

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

44

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

21

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

29

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

29

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

15

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

14

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

36

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

12

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,060.00

5

XCSE

GENMAB A/S

16/04/2024

9:15:19 AM

2,061.00

48

XCSE

GENMAB A/S

16/04/2024

9:19:19 AM

2,060.00

79

XCSE

GENMAB A/S

16/04/2024

9:19:19 AM

2,060.00

37

AQEU

GENMAB A/S

16/04/2024

9:22:13 AM

2,065.00

66

CEUX

GENMAB A/S

16/04/2024

9:22:13 AM

2,065.00

23

CEUX

GENMAB A/S

16/04/2024

9:25:54 AM

2,067.00

76

CEUX

GENMAB A/S

16/04/2024

9:25:54 AM

2,067.00

10

CEUX

GENMAB A/S

16/04/2024

9:27:46 AM

2,063.00

6

CEUX

GENMAB A/S

16/04/2024

9:29:44 AM

2,066.00

45

TQEX

GENMAB A/S

16/04/2024

9:29:44 AM

2,066.00

21

TQEX

GENMAB A/S

16/04/2024

9:29:44 AM

2,066.00

15

TQEX

GENMAB A/S

16/04/2024

9:30:30 AM

2,066.00

75

XCSE

GENMAB A/S

16/04/2024

9:30:30 AM

2,066.00

4

AQEU

GENMAB A/S

16/04/2024

9:30:30 AM

2,066.00

6

AQEU

GENMAB A/S

16/04/2024

9:30:30 AM

2,066.00

68

CEUX

GENMAB A/S

16/04/2024

9:30:30 AM

2,066.00

10

TQEX

GENMAB A/S

16/04/2024

9:35:06 AM

2,066.00

7

AQEU

GENMAB A/S

16/04/2024

9:35:06 AM

2,066.00

48

CEUX

GENMAB A/S

16/04/2024

9:35:06 AM

2,066.00

8

TQEX

GENMAB A/S

16/04/2024

9:35:06 AM

2,066.00

39

XCSE

GENMAB A/S

16/04/2024

9:35:06 AM

2,066.00

15

XCSE

GENMAB A/S

16/04/2024

9:35:42 AM

2,066.00

7

AQEU

GENMAB A/S

16/04/2024

9:35:42 AM

2,066.00

32

CEUX

GENMAB A/S

16/04/2024

9:35:42 AM

2,066.00

16

CEUX

GENMAB A/S

16/04/2024

9:35:42 AM

2,066.00

7

TQEX

GENMAB A/S

16/04/2024

9:35:42 AM

2,066.00

52

XCSE

GENMAB A/S

16/04/2024

9:35:43 AM

2,064.00

34

XCSE

GENMAB A/S

16/04/2024

9:35:43 AM

2,064.00

21

XCSE

GENMAB A/S

16/04/2024

9:40:11 AM

2,063.00

40

XCSE

24


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

9:40:11 AM

2,063.00

35

XCSE

GENMAB A/S

16/04/2024

9:40:11 AM

2,063.00

67

CEUX

GENMAB A/S

16/04/2024

9:40:11 AM

2,063.00

10

AQEU

GENMAB A/S

16/04/2024

9:40:11 AM

2,063.00

10

TQEX

GENMAB A/S

16/04/2024

9:43:06 AM

2,065.00

13

AQEU

GENMAB A/S

16/04/2024

9:43:06 AM

2,065.00

71

CEUX

GENMAB A/S

16/04/2024

9:43:06 AM

2,065.00

103

XCSE

GENMAB A/S

16/04/2024

9:43:06 AM

2,065.00

22

CEUX

GENMAB A/S

16/04/2024

9:49:50 AM

2,070.00

1

TQEX

GENMAB A/S

16/04/2024

9:56:24 AM

2,076.00

11

XCSE

GENMAB A/S

16/04/2024

9:56:24 AM

2,076.00

11

XCSE

GENMAB A/S

16/04/2024

9:56:24 AM

2,076.00

20

XCSE

GENMAB A/S

16/04/2024

9:56:24 AM

2,076.00

2

AQEU

GENMAB A/S

16/04/2024

9:56:24 AM

2,076.00

10

AQEU

GENMAB A/S

16/04/2024

9:56:24 AM

2,076.00

11

CEUX

GENMAB A/S

16/04/2024

9:56:36 AM

2,077.00

5

AQEU

GENMAB A/S

16/04/2024

9:56:36 AM

2,077.00

15

AQEU

GENMAB A/S

16/04/2024

9:56:36 AM

2,077.00

139

CEUX

GENMAB A/S

16/04/2024

9:56:36 AM

2,077.00

156

XCSE

GENMAB A/S

16/04/2024

10:04:28 AM

2,077.00

7

AQEU

GENMAB A/S

16/04/2024

10:04:28 AM

2,077.00

14

TQEX

GENMAB A/S

16/04/2024

10:04:28 AM

2,077.00

7

XCSE

GENMAB A/S

16/04/2024

10:04:28 AM

2,077.00

6

XCSE

GENMAB A/S

16/04/2024

10:05:08 AM

2,076.00

14

CEUX

GENMAB A/S

16/04/2024

10:05:08 AM

2,076.00

7

CEUX

GENMAB A/S

16/04/2024

10:05:08 AM

2,076.00

11

TQEX

GENMAB A/S

16/04/2024

10:05:15 AM

2,075.00

40

CEUX

GENMAB A/S

16/04/2024

10:05:15 AM

2,075.00

6

TQEX

GENMAB A/S

16/04/2024

10:05:15 AM

2,075.00

6

AQEU

GENMAB A/S

16/04/2024

10:05:15 AM

2,075.00

44

XCSE

GENMAB A/S

16/04/2024

10:05:18 AM

2,074.00

43

XCSE

GENMAB A/S

16/04/2024

10:05:18 AM

2,074.00

65

XCSE

GENMAB A/S

16/04/2024

10:05:18 AM

2,074.00

21

XCSE

GENMAB A/S

16/04/2024

10:05:18 AM

2,074.00

43

XCSE

GENMAB A/S

16/04/2024

10:05:18 AM

2,074.00

2

XCSE

GENMAB A/S

16/04/2024

10:06:16 AM

2,072.00

44

XCSE

GENMAB A/S

16/04/2024

10:06:16 AM

2,072.00

44

XCSE

GENMAB A/S

16/04/2024

10:06:16 AM

2,072.00

1

XCSE

GENMAB A/S

16/04/2024

10:10:42 AM

2,073.00

90

CEUX

25


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

10:10:46 AM

2,072.00

76

CEUX

GENMAB A/S

16/04/2024

10:10:46 AM

2,072.00

12

CEUX

GENMAB A/S

16/04/2024

10:10:46 AM

2,072.00

42

XCSE

GENMAB A/S

16/04/2024

10:10:46 AM

2,072.00

42

XCSE

GENMAB A/S

16/04/2024

10:10:46 AM

2,072.00

5

XCSE

GENMAB A/S

16/04/2024

10:15:47 AM

2,068.00

45

XCSE

GENMAB A/S

16/04/2024

10:15:47 AM

2,068.00

45

XCSE

GENMAB A/S

16/04/2024

10:16:22 AM

2,067.00

12

XCSE

GENMAB A/S

16/04/2024

10:16:22 AM

2,067.00

34

XCSE

GENMAB A/S

16/04/2024

10:16:28 AM

2,067.00

21

XCSE

GENMAB A/S

16/04/2024

10:16:28 AM

2,067.00

21

XCSE

GENMAB A/S

16/04/2024

10:16:28 AM

2,067.00

21

XCSE

GENMAB A/S

16/04/2024

10:16:28 AM

2,067.00

18

XCSE

GENMAB A/S

16/04/2024

10:16:28 AM

2,067.00

14

XCSE

GENMAB A/S

16/04/2024

10:16:33 AM

2,066.00

41

TQEX

GENMAB A/S

16/04/2024

10:16:33 AM

2,066.00

12

TQEX

GENMAB A/S

16/04/2024

10:22:53 AM

2,065.00

23

CEUX

GENMAB A/S

16/04/2024

10:22:53 AM

2,065.00

14

CEUX

GENMAB A/S

16/04/2024

10:22:53 AM

2,065.00

23

CEUX

GENMAB A/S

16/04/2024

10:22:53 AM

2,065.00

14

CEUX

GENMAB A/S

16/04/2024

10:22:53 AM

2,065.00

1

CEUX

GENMAB A/S

16/04/2024

10:22:53 AM

2,065.00

73

XCSE

GENMAB A/S

16/04/2024

10:22:54 AM

2,064.00

47

XCSE

GENMAB A/S

16/04/2024

10:22:54 AM

2,064.00

47

XCSE

GENMAB A/S

16/04/2024

10:22:54 AM

2,064.00

40

XCSE

GENMAB A/S

16/04/2024

10:30:08 AM

2,060.00

43

XCSE

GENMAB A/S

16/04/2024

10:30:08 AM

2,059.00

33

CEUX

GENMAB A/S

16/04/2024

10:30:08 AM

2,059.00

75

XCSE

GENMAB A/S

16/04/2024

10:30:08 AM

2,059.00

9

XCSE

GENMAB A/S

16/04/2024

10:30:08 AM

2,059.00

18

CEUX

GENMAB A/S

16/04/2024

10:34:31 AM

2,069.00

7

XCSE

GENMAB A/S

16/04/2024

10:34:31 AM

2,069.00

36

XCSE

GENMAB A/S

16/04/2024

10:35:57 AM

2,069.00

36

CEUX

GENMAB A/S

16/04/2024

10:35:57 AM

2,069.00

14

CEUX

GENMAB A/S

16/04/2024

10:35:57 AM

2,068.00

81

XCSE

GENMAB A/S

16/04/2024

10:35:57 AM

2,068.00

10

XCSE

GENMAB A/S

16/04/2024

10:35:58 AM

2,067.00

45

XCSE

GENMAB A/S

16/04/2024

10:35:58 AM

2,067.00

86

XCSE

GENMAB A/S

16/04/2024

10:35:58 AM

2,067.00

45

XCSE

26


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

10:43:28 AM

2,068.00

21

XCSE

GENMAB A/S

16/04/2024

10:43:28 AM

2,068.00

58

XCSE

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

10

XCSE

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

10

CEUX

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

10

CEUX

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

3

CEUX

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

4

TQEX

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

10

XCSE

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

26

XCSE

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

10

CEUX

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

10

CEUX

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

4

TQEX

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

25

XCSE

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

25

XCSE

GENMAB A/S

16/04/2024

10:45:02 AM

2,068.00

20

XCSE

GENMAB A/S

16/04/2024

10:49:20 AM

2,062.00

16

XCSE

GENMAB A/S

16/04/2024

10:51:33 AM

2,063.00

24

XCSE

GENMAB A/S

16/04/2024

10:51:45 AM

2,063.00

24

XCSE

GENMAB A/S

16/04/2024

10:51:45 AM

2,063.00

20

XCSE

GENMAB A/S

16/04/2024

10:51:45 AM

2,063.00

13

CEUX

GENMAB A/S

16/04/2024

10:51:45 AM

2,063.00

54

CEUX

GENMAB A/S

16/04/2024

10:53:13 AM

2,063.00

47

XCSE

GENMAB A/S

16/04/2024

10:53:13 AM

2,062.00

50

XCSE

GENMAB A/S

16/04/2024

10:53:13 AM

2,062.00

50

XCSE

GENMAB A/S

16/04/2024

10:53:13 AM

2,062.00

20

XCSE

GENMAB A/S

16/04/2024

10:53:13 AM

2,062.00

13

XCSE

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

25

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

27

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

25

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

27

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

11

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

25

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

2

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,063.00

6

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,062.00

75

XCSE

GENMAB A/S

16/04/2024

11:00:00 AM

2,062.00

4

XCSE

GENMAB A/S

16/04/2024

11:00:00 AM

2,062.00

21

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,062.00

56

CEUX

GENMAB A/S

16/04/2024

11:00:00 AM

2,062.00

78

CEUX

27


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

11:07:31 AM

2,061.00

94

XCSE

GENMAB A/S

16/04/2024

11:07:31 AM

2,061.00

12

AQEU

GENMAB A/S

16/04/2024

11:07:31 AM

2,061.00

85

CEUX

GENMAB A/S

16/04/2024

11:07:31 AM

2,061.00

13

TQEX

GENMAB A/S

16/04/2024

11:07:31 AM

2,060.00

24

XCSE

GENMAB A/S

16/04/2024

11:07:31 AM

2,060.00

49

XCSE

GENMAB A/S

16/04/2024

11:13:53 AM

2,062.00

20

XCSE

GENMAB A/S

16/04/2024

11:13:53 AM

2,062.00

4

XCSE

GENMAB A/S

16/04/2024

11:13:53 AM

2,062.00

24

XCSE

GENMAB A/S

16/04/2024

11:13:53 AM

2,062.00

30

XCSE

GENMAB A/S

16/04/2024

11:13:53 AM

2,062.00

24

XCSE

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

7

AQEU

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

36

CEUX

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

10

CEUX

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

37

XCSE

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

16

XCSE

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

33

XCSE

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

28

XCSE

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

8

AQEU

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

23

CEUX

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

8

XCSE

GENMAB A/S

16/04/2024

11:19:36 AM

2,062.00

22

XCSE

GENMAB A/S

16/04/2024

11:19:37 AM

2,062.00

22

XCSE

GENMAB A/S

16/04/2024

11:19:37 AM

2,062.00

22

XCSE

GENMAB A/S

16/04/2024

11:19:37 AM

2,062.00

13

XCSE

GENMAB A/S

16/04/2024

11:29:17 AM

2,061.00

1

AQEU

GENMAB A/S

16/04/2024

11:29:17 AM

2,061.00

7

AQEU

GENMAB A/S

16/04/2024

11:29:37 AM

2,061.00

7

AQEU

GENMAB A/S

16/04/2024

11:29:37 AM

2,061.00

1

TQEX

GENMAB A/S

16/04/2024

11:29:59 AM

2,062.00

28

XCSE

GENMAB A/S

16/04/2024

11:29:59 AM

2,062.00

11

XCSE

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

64

XCSE

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

3

AQEU

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

58

CEUX

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

36

CEUX

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

8

TQEX

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

1

TQEX

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

2

TQEX

GENMAB A/S

16/04/2024

11:29:59 AM

2,061.00

8

CEUX

28


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

11:30:01 AM

2,060.00

68

CEUX

GENMAB A/S

16/04/2024

11:30:01 AM

2,060.00

17

CEUX

GENMAB A/S

16/04/2024

11:30:01 AM

2,060.00

50

CEUX

GENMAB A/S

16/04/2024

11:34:15 AM

2,059.00

37

XCSE

GENMAB A/S

16/04/2024

11:34:15 AM

2,059.00

74

XCSE

GENMAB A/S

16/04/2024

11:40:10 AM

2,063.00

23

XCSE

GENMAB A/S

16/04/2024

11:40:10 AM

2,063.00

23

XCSE

GENMAB A/S

16/04/2024

11:40:15 AM

2,063.00

23

XCSE

GENMAB A/S

16/04/2024

11:40:15 AM

2,063.00

23

XCSE

GENMAB A/S

16/04/2024

11:40:15 AM

2,063.00

23

XCSE

GENMAB A/S

16/04/2024

11:40:15 AM

2,063.00

10

XCSE

GENMAB A/S

16/04/2024

11:43:24 AM

2,063.00

2

AQEU

GENMAB A/S

16/04/2024

11:43:24 AM

2,063.00

3

CEUX

GENMAB A/S

16/04/2024

11:43:31 AM

2,063.00

8

XCSE

GENMAB A/S

16/04/2024

11:43:31 AM

2,063.00

4

TQEX

GENMAB A/S

16/04/2024

11:44:02 AM

2,063.00

18

CEUX

GENMAB A/S

16/04/2024

11:44:02 AM

2,063.00

8

XCSE

GENMAB A/S

16/04/2024

11:44:02 AM

2,063.00

2

AQEU

GENMAB A/S

16/04/2024

11:44:02 AM

2,063.00

16

CEUX

GENMAB A/S

16/04/2024

11:44:02 AM

2,063.00

12

CEUX

GENMAB A/S

16/04/2024

11:44:02 AM

2,063.00

7

CEUX

GENMAB A/S

16/04/2024

11:44:04 AM

2,063.00

22

XCSE

GENMAB A/S

16/04/2024

11:44:04 AM

2,063.00

22

XCSE

GENMAB A/S

16/04/2024

11:44:04 AM

2,063.00

22

XCSE

GENMAB A/S

16/04/2024

11:44:04 AM

2,063.00

11

XCSE

GENMAB A/S

16/04/2024

11:44:04 AM

2,063.00

11

XCSE

GENMAB A/S

16/04/2024

11:44:04 AM

2,063.00

9

XCSE

GENMAB A/S

16/04/2024

11:49:12 AM

2,063.00

46

XCSE

GENMAB A/S

16/04/2024

11:49:12 AM

2,063.00

25

XCSE

GENMAB A/S

16/04/2024

11:49:34 AM

2,062.00

64

XCSE

GENMAB A/S

16/04/2024

11:52:08 AM

2,060.00

67

CEUX

GENMAB A/S

16/04/2024

11:52:57 AM

2,060.00

70

CEUX

GENMAB A/S

16/04/2024

11:53:45 AM

2,058.00

74

XCSE

GENMAB A/S

16/04/2024

11:59:07 AM

2,061.00

46

XCSE

GENMAB A/S

16/04/2024

11:59:07 AM

2,061.00

6

AQEU

GENMAB A/S

16/04/2024

11:59:07 AM

2,061.00

42

CEUX

GENMAB A/S

16/04/2024

11:59:07 AM

2,061.00

7

TQEX

GENMAB A/S

16/04/2024

12:04:57 PM

2,062.00

68

XCSE

GENMAB A/S

16/04/2024

12:04:57 PM

2,062.00

61

CEUX

29


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

12:04:57 PM

2,062.00

9

CEUX

GENMAB A/S

16/04/2024

12:10:45 PM

2,059.00

2

AQEU

GENMAB A/S

16/04/2024

12:10:45 PM

2,059.00

6

AQEU

GENMAB A/S

16/04/2024

12:10:45 PM

2,059.00

55

CEUX

GENMAB A/S

16/04/2024

12:10:45 PM

2,059.00

9

TQEX

GENMAB A/S

16/04/2024

12:10:45 PM

2,059.00

42

XCSE

GENMAB A/S

16/04/2024

12:10:45 PM

2,059.00

19

XCSE

GENMAB A/S

16/04/2024

12:10:45 PM

2,059.00

70

XCSE

GENMAB A/S

16/04/2024

12:18:56 PM

2,076.00

1

AQEU

GENMAB A/S

16/04/2024

12:18:56 PM

2,076.00

7

AQEU

GENMAB A/S

16/04/2024

12:18:59 PM

2,076.00

37

AQEU

GENMAB A/S

16/04/2024

12:18:59 PM

2,075.00

64

XCSE

GENMAB A/S

16/04/2024

12:18:59 PM

2,075.00

35

CEUX

GENMAB A/S

16/04/2024

12:18:59 PM

2,075.00

58

CEUX

GENMAB A/S

16/04/2024

12:18:59 PM

2,075.00

9

TQEX

GENMAB A/S

16/04/2024

12:18:59 PM

2,075.00

9

CEUX

GENMAB A/S

16/04/2024

12:20:41 PM

2,075.00

65

XCSE

GENMAB A/S

16/04/2024

12:20:41 PM

2,075.00

68

CEUX

GENMAB A/S

16/04/2024

12:20:41 PM

2,075.00

6

CEUX

GENMAB A/S

16/04/2024

12:28:29 PM

2,080.00

25

CEUX

GENMAB A/S

16/04/2024

12:28:29 PM

2,080.00

25

CEUX

GENMAB A/S

16/04/2024

12:28:29 PM

2,080.00

19

CEUX

GENMAB A/S

16/04/2024

12:33:32 PM

2,079.00

19

TQEX

GENMAB A/S

16/04/2024

12:33:32 PM

2,079.00

4

TQEX

GENMAB A/S

16/04/2024

12:33:32 PM

2,079.00

19

TQEX

GENMAB A/S

16/04/2024

12:33:32 PM

2,079.00

23

TQEX

GENMAB A/S

16/04/2024

12:33:32 PM

2,079.00

23

TQEX

GENMAB A/S

16/04/2024

12:36:32 PM

2,080.00

41

XCSE

GENMAB A/S

16/04/2024

12:36:37 PM

2,080.00

24

XCSE

GENMAB A/S

16/04/2024

12:37:02 PM

2,080.00

59

CEUX

GENMAB A/S

16/04/2024

12:37:02 PM

2,080.00

6

CEUX

GENMAB A/S

16/04/2024

12:37:02 PM

2,080.00

3

CEUX

GENMAB A/S

16/04/2024

12:37:02 PM

2,080.00

12

CEUX

GENMAB A/S

16/04/2024

12:41:44 PM

2,083.00

44

XCSE

GENMAB A/S

16/04/2024

12:41:44 PM

2,083.00

27

XCSE

GENMAB A/S

16/04/2024

12:41:44 PM

2,083.00

25

XCSE

GENMAB A/S

16/04/2024

12:41:44 PM

2,083.00

2

XCSE

GENMAB A/S

16/04/2024

12:41:44 PM

2,083.00

9

XCSE

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

3

CEUX

30


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

36

CEUX

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

41

CEUX

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

24

CEUX

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

6

AQEU

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

7

AQEU

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

24

CEUX

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

6

TQEX

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

44

XCSE

GENMAB A/S

16/04/2024

12:48:47 PM

2,084.00

21

CEUX

GENMAB A/S

16/04/2024

12:57:09 PM

2,083.00

26

XCSE

GENMAB A/S

16/04/2024

12:57:09 PM

2,083.00

26

XCSE

GENMAB A/S

16/04/2024

12:57:09 PM

2,083.00

26

XCSE

GENMAB A/S

16/04/2024

12:57:09 PM

2,083.00

26

XCSE

GENMAB A/S

16/04/2024

12:57:09 PM

2,083.00

26

XCSE

GENMAB A/S

16/04/2024

12:57:09 PM

2,083.00

10

XCSE

GENMAB A/S

16/04/2024

1:02:00 PM

2,082.00

6

AQEU

GENMAB A/S

16/04/2024

1:02:00 PM

2,082.00

10

CEUX

GENMAB A/S

16/04/2024

1:02:00 PM

2,082.00

33

CEUX

GENMAB A/S

16/04/2024

1:02:00 PM

2,082.00

7

TQEX

GENMAB A/S

16/04/2024

1:02:00 PM

2,082.00

47

XCSE

GENMAB A/S

16/04/2024

1:02:00 PM

2,081.00

43

XCSE

GENMAB A/S

16/04/2024

1:02:00 PM

2,081.00

9

XCSE

GENMAB A/S

16/04/2024

1:09:38 PM

2,077.00

25

CEUX

GENMAB A/S

16/04/2024

1:13:32 PM

2,076.00

40

XCSE

GENMAB A/S

16/04/2024

1:13:32 PM

2,076.00

50

XCSE

GENMAB A/S

16/04/2024

1:13:32 PM

2,076.00

49

XCSE

GENMAB A/S

16/04/2024

1:13:39 PM

2,075.00

51

XCSE

GENMAB A/S

16/04/2024

1:13:39 PM

2,075.00

79

CEUX

GENMAB A/S

16/04/2024

1:26:33 PM

2,080.00

10

CEUX

GENMAB A/S

16/04/2024

1:26:33 PM

2,080.00

27

CEUX

GENMAB A/S

16/04/2024

1:26:37 PM

2,080.00

39

XCSE

GENMAB A/S

16/04/2024

1:28:06 PM

2,080.00

9

CEUX

GENMAB A/S

16/04/2024

1:28:06 PM

2,080.00

30

XCSE

GENMAB A/S

16/04/2024

1:29:35 PM

2,080.00

11

CEUX

GENMAB A/S

16/04/2024

1:29:35 PM

2,080.00

29

XCSE

GENMAB A/S

16/04/2024

1:30:10 PM

2,079.00

30

XCSE

GENMAB A/S

16/04/2024

1:30:10 PM

2,079.00

10

CEUX

GENMAB A/S

16/04/2024

1:30:10 PM

2,079.00

10

CEUX

GENMAB A/S

16/04/2024

1:30:10 PM

2,079.00

4

TQEX

31


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

1:31:33 PM

2,080.00

26

XCSE

GENMAB A/S

16/04/2024

1:31:33 PM

2,080.00

26

XCSE

GENMAB A/S

16/04/2024

1:31:33 PM

2,080.00

9

XCSE

GENMAB A/S

16/04/2024

1:31:33 PM

2,080.00

24

XCSE

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

26

XCSE

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

14

XCSE

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

4

AQEU

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

4

AQEU

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

4

AQEU

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

11

CEUX

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

13

CEUX

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

14

CEUX

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

13

CEUX

GENMAB A/S

16/04/2024

1:31:39 PM

2,080.00

13

CEUX

GENMAB A/S

16/04/2024

1:38:53 PM

2,083.00

21

XCSE

GENMAB A/S

16/04/2024

1:38:53 PM

2,083.00

15

XCSE

GENMAB A/S

16/04/2024

1:38:53 PM

2,083.00

6

XCSE

GENMAB A/S

16/04/2024

1:38:53 PM

2,083.00

21

XCSE

GENMAB A/S

16/04/2024

1:38:53 PM

2,083.00

21

XCSE

GENMAB A/S

16/04/2024

1:38:57 PM

2,083.00

25

XCSE

GENMAB A/S

16/04/2024

1:48:09 PM

2,085.00

21

XCSE

GENMAB A/S

16/04/2024

1:48:09 PM

2,085.00

3

XCSE

GENMAB A/S

16/04/2024

1:48:09 PM

2,085.00

21

XCSE

GENMAB A/S

16/04/2024

1:48:09 PM

2,085.00

1

XCSE

GENMAB A/S

16/04/2024

1:48:09 PM

2,085.00

21

XCSE

GENMAB A/S

16/04/2024

1:48:09 PM

2,085.00

1

XCSE

GENMAB A/S

16/04/2024

1:48:09 PM

2,085.00

21

XCSE

GENMAB A/S

16/04/2024

1:49:11 PM

2,085.00

53

CEUX

GENMAB A/S

16/04/2024

2:12:48 PM

2,085.00

48

TQEX

GENMAB A/S

16/04/2024

2:26:05 PM

2,085.00

1

XCSE

GENMAB A/S

16/04/2024

2:26:27 PM

2,085.00

81

XCSE

GENMAB A/S

16/04/2024

2:29:39 PM

2,082.00

48

XCSE

GENMAB A/S

16/04/2024

2:29:39 PM

2,082.00

27

XCSE

GENMAB A/S

16/04/2024

2:29:39 PM

2,082.00

20

XCSE

GENMAB A/S

16/04/2024

2:29:57 PM

2,079.00

39

CEUX

GENMAB A/S

16/04/2024

2:39:27 PM

2,081.00

49

CEUX

GENMAB A/S

16/04/2024

2:39:27 PM

2,081.00

25

CEUX

GENMAB A/S

16/04/2024

2:42:18 PM

2,080.00

2

XCSE

GENMAB A/S

16/04/2024

2:42:18 PM

2,080.00

16

XCSE

32


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

2:42:18 PM

2,080.00

16

XCSE

GENMAB A/S

16/04/2024

2:42:18 PM

2,080.00

8

CEUX

GENMAB A/S

16/04/2024

2:46:06 PM

2,083.00

29

TQEX

GENMAB A/S

16/04/2024

2:46:56 PM

2,083.00

7

AQEU

GENMAB A/S

16/04/2024

2:47:02 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:47:14 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:47:25 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:47:38 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:47:49 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:48:41 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:49:06 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:49:21 PM

2,083.00

7

TQEX

GENMAB A/S

16/04/2024

2:50:10 PM

2,081.00

95

XCSE

GENMAB A/S

16/04/2024

2:50:10 PM

2,081.00

14

TQEX

GENMAB A/S

16/04/2024

2:50:10 PM

2,081.00

12

AQEU

GENMAB A/S

16/04/2024

2:50:10 PM

2,081.00

75

CEUX

GENMAB A/S

16/04/2024

2:50:10 PM

2,081.00

11

CEUX

GENMAB A/S

16/04/2024

2:50:10 PM

2,080.00

39

CEUX

GENMAB A/S

16/04/2024

2:50:10 PM

2,080.00

40

CEUX

GENMAB A/S

16/04/2024

2:55:57 PM

2,077.00

102

XCSE

GENMAB A/S

16/04/2024

2:55:57 PM

2,077.00

13

AQEU

GENMAB A/S

16/04/2024

2:55:57 PM

2,077.00

92

CEUX

GENMAB A/S

16/04/2024

2:55:57 PM

2,077.00

14

TQEX

GENMAB A/S

16/04/2024

2:55:57 PM

2,076.00

78

CEUX

GENMAB A/S

16/04/2024

2:55:57 PM

2,076.00

74

CEUX

GENMAB A/S

16/04/2024

2:58:18 PM

2,064.00

44

CEUX

GENMAB A/S

16/04/2024

3:00:07 PM

2,061.00

49

CEUX

GENMAB A/S

16/04/2024

3:06:02 PM

2,056.00

22

CEUX

GENMAB A/S

16/04/2024

3:06:45 PM

2,056.00

10

XCSE

GENMAB A/S

16/04/2024

3:06:45 PM

2,056.00

53

XCSE

GENMAB A/S

16/04/2024

3:06:53 PM

2,054.00

15

XCSE

GENMAB A/S

16/04/2024

3:09:49 PM

2,050.00

61

CEUX

GENMAB A/S

16/04/2024

3:11:06 PM

2,048.00

49

XCSE

GENMAB A/S

16/04/2024

3:11:06 PM

2,048.00

49

XCSE

GENMAB A/S

16/04/2024

3:15:38 PM

2,057.00

35

XCSE

GENMAB A/S

16/04/2024

3:16:34 PM

2,056.00

2

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,056.00

56

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,056.00

9

TQEX

GENMAB A/S

16/04/2024

3:16:34 PM

2,056.00

64

XCSE

33


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

21

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

19

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

21

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

19

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

2

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

2

CEUX

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

4

TQEX

GENMAB A/S

16/04/2024

3:16:34 PM

2,055.00

4

TQEX

GENMAB A/S

16/04/2024

3:20:31 PM

2,056.00

8

XCSE

GENMAB A/S

16/04/2024

3:20:31 PM

2,056.00

96

XCSE

GENMAB A/S

16/04/2024

3:20:31 PM

2,056.00

13

AQEU

GENMAB A/S

16/04/2024

3:20:31 PM

2,056.00

93

CEUX

GENMAB A/S

16/04/2024

3:20:31 PM

2,056.00

15

TQEX

GENMAB A/S

16/04/2024

3:20:31 PM

2,055.00

42

XCSE

GENMAB A/S

16/04/2024

3:20:31 PM

2,055.00

42

XCSE

GENMAB A/S

16/04/2024

3:20:31 PM

2,055.00

19

XCSE

GENMAB A/S

16/04/2024

3:20:31 PM

2,054.00

43

XCSE

GENMAB A/S

16/04/2024

3:20:31 PM

2,054.00

43

XCSE

GENMAB A/S

16/04/2024

3:20:31 PM

2,054.00

21

CEUX

GENMAB A/S

16/04/2024

3:22:40 PM

2,050.00

54

XCSE

GENMAB A/S

16/04/2024

3:22:40 PM

2,050.00

54

CEUX

GENMAB A/S

16/04/2024

3:22:40 PM

2,050.00

4

CEUX

GENMAB A/S

16/04/2024

3:22:41 PM

2,050.00

8

CEUX

GENMAB A/S

16/04/2024

3:23:47 PM

2,046.00

45

XCSE

GENMAB A/S

16/04/2024

3:23:47 PM

2,046.00

1

XCSE

GENMAB A/S

16/04/2024

3:29:22 PM

2,041.00

48

XCSE

GENMAB A/S

16/04/2024

3:30:01 PM

2,040.00

6

AQEU

GENMAB A/S

16/04/2024

3:30:01 PM

2,040.00

45

XCSE

GENMAB A/S

16/04/2024

3:30:01 PM

2,040.00

39

CEUX

GENMAB A/S

16/04/2024

3:30:01 PM

2,040.00

8

CEUX

GENMAB A/S

16/04/2024

3:30:01 PM

2,039.00

2

AQEU

GENMAB A/S

16/04/2024

3:30:01 PM

2,039.00

22

AQEU

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

9

CEUX

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

9

CEUX

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

5

TQEX

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

3

CEUX

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

6

CEUX

34


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

1

AQEU

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

6

CEUX

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

5

TQEX

GENMAB A/S

16/04/2024

3:33:16 PM

2,041.00

1

AQEU

GENMAB A/S

16/04/2024

3:33:17 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:17 PM

2,041.00

1

AQEU

GENMAB A/S

16/04/2024

3:33:17 PM

2,041.00

3

CEUX

GENMAB A/S

16/04/2024

3:33:17 PM

2,041.00

5

TQEX

GENMAB A/S

16/04/2024

3:33:17 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

1

AQEU

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

9

CEUX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

9

CEUX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

6

CEUX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

5

TQEX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

5

TQEX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

1

AQEU

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

9

CEUX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

9

CEUX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

5

TQEX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

8

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

1

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

2

TQEX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

3

TQEX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

1

AQEU

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

9

CEUX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

5

TQEX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

1

TQEX

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

7

AQEU

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

30

XCSE

GENMAB A/S

16/04/2024

3:33:21 PM

2,041.00

13

XCSE

35


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

120

XCSE

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

3

TQEX

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

14

TQEX

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

4

AQEU

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

4

AQEU

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

7

AQEU

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

75

CEUX

GENMAB A/S

16/04/2024

3:35:30 PM

2,039.00

33

CEUX

GENMAB A/S

16/04/2024

3:35:31 PM

2,037.00

23

XCSE

GENMAB A/S

16/04/2024

3:35:31 PM

2,037.00

21

CEUX

GENMAB A/S

16/04/2024

3:35:31 PM

2,037.00

3

AQEU

GENMAB A/S

16/04/2024

3:35:31 PM

2,037.00

5

TQEX

GENMAB A/S

16/04/2024

3:35:31 PM

2,037.00

23

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

1

AQEU

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

CEUX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

CEUX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

5

TQEX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

5

TQEX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

1

AQEU

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

CEUX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

5

TQEX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

CEUX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

5

TQEX

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

10

XCSE

GENMAB A/S

16/04/2024

3:36:39 PM

2,038.00

18

CEUX

GENMAB A/S

16/04/2024

3:36:40 PM

2,037.00

20

XCSE

GENMAB A/S

16/04/2024

3:36:40 PM

2,037.00

73

CEUX

GENMAB A/S

16/04/2024

3:38:34 PM

2,031.00

1

AQEU

GENMAB A/S

16/04/2024

3:38:34 PM

2,031.00

1

AQEU

GENMAB A/S

16/04/2024

3:38:34 PM

2,031.00

1

AQEU

GENMAB A/S

16/04/2024

3:38:35 PM

2,031.00

1

AQEU

GENMAB A/S

16/04/2024

3:38:42 PM

2,031.00

3

AQEU

36


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:38:42 PM

2,031.00

3

AQEU

GENMAB A/S

16/04/2024

3:38:42 PM

2,031.00

67

CEUX

GENMAB A/S

16/04/2024

3:38:42 PM

2,031.00

2

TQEX

GENMAB A/S

16/04/2024

3:38:42 PM

2,031.00

8

TQEX

GENMAB A/S

16/04/2024

3:38:42 PM

2,031.00

75

XCSE

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

22

XCSE

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

3

AQEU

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

3

AQEU

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

20

CEUX

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

20

CEUX

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

5

TQEX

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

3

AQEU

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

5

CEUX

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

5

TQEX

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

22

XCSE

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

3

CEUX

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

47

CEUX

GENMAB A/S

16/04/2024

3:38:56 PM

2,027.00

14

CEUX

GENMAB A/S

16/04/2024

3:39:28 PM

2,023.00

19

CEUX

GENMAB A/S

16/04/2024

3:40:19 PM

2,019.00

19

XCSE

GENMAB A/S

16/04/2024

3:40:20 PM

2,019.00

19

XCSE

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

3

CEUX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

1

CEUX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

1

AQEU

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

1

XCSE

GENMAB A/S

16/04/2024

3:42:33 PM

2,028.00

1

AQEU

GENMAB A/S

16/04/2024

3:42:34 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:42:37 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

37


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

23

XCSE

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

3

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

3

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

AQEU

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

4

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

4

TQEX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

2

AQEU

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

2

AQEU

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

6

AQEU

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

12

AQEU

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

2

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

9

CEUX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

1

TQEX

GENMAB A/S

16/04/2024

3:43:08 PM

2,028.00

2

TQEX

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

50

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

12

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

38

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

3

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

12

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

5

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

5

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

5

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

2

XCSE

GENMAB A/S

16/04/2024

3:43:34 PM

2,024.00

3

AQEU

38


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:45:41 PM

2,027.00

21

XCSE

GENMAB A/S

16/04/2024

3:45:41 PM

2,027.00

6

XCSE

GENMAB A/S

16/04/2024

3:45:41 PM

2,027.00

6

XCSE

GENMAB A/S

16/04/2024

3:45:41 PM

2,027.00

21

XCSE

GENMAB A/S

16/04/2024

3:45:41 PM

2,027.00

21

XCSE

GENMAB A/S

16/04/2024

3:45:41 PM

2,027.00

6

XCSE

GENMAB A/S

16/04/2024

3:45:41 PM

2,027.00

1

XCSE

GENMAB A/S

16/04/2024

3:45:43 PM

2,027.00

27

XCSE

GENMAB A/S

16/04/2024

3:45:43 PM

2,027.00

6

XCSE

GENMAB A/S

16/04/2024

3:45:43 PM

2,027.00

7

XCSE

GENMAB A/S

16/04/2024

3:45:43 PM

2,027.00

7

XCSE

GENMAB A/S

16/04/2024

3:45:43 PM

2,027.00

7

XCSE

GENMAB A/S

16/04/2024

3:45:43 PM

2,027.00

8

XCSE

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

16

XCSE

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

3

AQEU

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

3

AQEU

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

16

XCSE

GENMAB A/S

16/04/2024

3:46:30 PM

2,028.00

16

XCSE

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

9

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

9

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

9

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

9

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

3

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

9

XCSE

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

9

XCSE

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

22

XCSE

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

24

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

24

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

2

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

22

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

2

CEUX

GENMAB A/S

16/04/2024

3:48:02 PM

2,029.00

6

CEUX

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

9

XCSE

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

1

AQEU

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

4

AQEU

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

10

CEUX

39


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

9

XCSE

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

1

AQEU

GENMAB A/S

16/04/2024

3:48:29 PM

2,028.00

2

CEUX

GENMAB A/S

16/04/2024

3:48:31 PM

2,028.00

1

AQEU

GENMAB A/S

16/04/2024

3:48:31 PM

2,028.00

8

CEUX

GENMAB A/S

16/04/2024

3:48:31 PM

2,028.00

5

TQEX

GENMAB A/S

16/04/2024

3:48:31 PM

2,028.00

9

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

98

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

26

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

15

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

11

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

20

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

11

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

31

XCSE

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

13

AQEU

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

88

CEUX

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

13

TQEX

GENMAB A/S

16/04/2024

3:50:37 PM

2,031.00

5

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

18

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

AQEU

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

AQEU

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

AQEU

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

AQEU

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

AQEU

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

CEUX

40


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

8

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

4

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

AQEU

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

7

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

6

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

AQEU

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

4

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

4

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

30

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

5

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

AQEU

41


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

CEUX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

2

TQEX

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

9

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

30

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

23

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

23

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

24

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

23

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

1

XCSE

GENMAB A/S

16/04/2024

3:53:20 PM

2,035.00

3

XCSE

GENMAB A/S

16/04/2024

3:55:24 PM

2,034.00

8

AQEU

GENMAB A/S

16/04/2024

3:55:24 PM

2,034.00

54

CEUX

GENMAB A/S

16/04/2024

3:55:24 PM

2,034.00

8

TQEX

GENMAB A/S

16/04/2024

3:55:24 PM

2,034.00

60

XCSE

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

49

XCSE

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

26

XCSE

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

23

XCSE

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

7

XCSE

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

5

TQEX

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

7

AQEU

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

44

CEUX

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

2

CEUX

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

1

TQEX

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

8

TQEX

GENMAB A/S

16/04/2024

3:57:49 PM

2,042.00

49

XCSE

GENMAB A/S

16/04/2024

3:57:50 PM

2,042.00

60

XCSE

GENMAB A/S

16/04/2024

3:58:50 PM

2,044.00

21

XCSE

GENMAB A/S

16/04/2024

3:58:50 PM

2,044.00

21

XCSE

GENMAB A/S

16/04/2024

3:58:50 PM

2,044.00

21

XCSE

GENMAB A/S

16/04/2024

3:58:50 PM

2,044.00

39

XCSE

GENMAB A/S

16/04/2024

3:59:00 PM

2,044.00

7

AQEU

GENMAB A/S

16/04/2024

3:59:00 PM

2,044.00

8

CEUX

42


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

3:59:00 PM

2,044.00

8

TQEX

GENMAB A/S

16/04/2024

3:59:00 PM

2,044.00

56

XCSE

GENMAB A/S

16/04/2024

3:59:00 PM

2,044.00

42

CEUX

GENMAB A/S

16/04/2024

3:59:15 PM

2,041.00

47

XCSE

GENMAB A/S

16/04/2024

3:59:15 PM

2,041.00

21

XCSE

GENMAB A/S

16/04/2024

3:59:15 PM

2,041.00

30

XCSE

GENMAB A/S

16/04/2024

3:59:15 PM

2,041.00

51

XCSE

GENMAB A/S

16/04/2024

3:59:15 PM

2,041.00

24

XCSE

GENMAB A/S

16/04/2024

3:59:15 PM

2,041.00

3

XCSE

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

22

XCSE

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

22

XCSE

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

1

TQEX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

3

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

3

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

3

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

3

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

3

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

8

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

20

CEUX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

12

CEUX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

20

CEUX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

7

CEUX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

4

TQEX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

5

TQEX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

16

TQEX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

8

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

19

XCSE

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

8

AQEU

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

7

TQEX

GENMAB A/S

16/04/2024

4:02:03 PM

2,042.00

8

AQEU

GENMAB A/S

16/04/2024

4:02:14 PM

2,038.00

44

XCSE

GENMAB A/S

16/04/2024

4:02:14 PM

2,038.00

55

XCSE

GENMAB A/S

16/04/2024

4:02:14 PM

2,038.00

14

XCSE

GENMAB A/S

16/04/2024

4:04:04 PM

2,040.00

24

XCSE

GENMAB A/S

16/04/2024

4:04:04 PM

2,040.00

24

XCSE

GENMAB A/S

16/04/2024

4:04:04 PM

2,040.00

24

XCSE

GENMAB A/S

16/04/2024

4:04:05 PM

2,040.00

24

XCSE

GENMAB A/S

16/04/2024

4:04:05 PM

2,040.00

24

XCSE

GENMAB A/S

16/04/2024

4:07:07 PM

2,041.00

9

TQEX

43


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:07:21 PM

2,042.00

5

AQEU

GENMAB A/S

16/04/2024

4:07:25 PM

2,042.00

7

AQEU

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

5

AQEU

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

40

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

5

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

26

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

27

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

31

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

24

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

31

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

31

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

1

CEUX

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

27

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

7

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

22

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

29

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

5

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

22

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

2

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

34

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

22

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

48

XCSE

GENMAB A/S

16/04/2024

4:07:54 PM

2,042.00

2

XCSE

GENMAB A/S

16/04/2024

4:08:36 PM

2,042.00

9

XCSE

GENMAB A/S

16/04/2024

4:08:54 PM

2,043.00

64

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,044.00

56

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,044.00

28

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,044.00

28

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,044.00

24

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,044.00

30

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,044.00

16

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,044.00

8

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,043.00

42

XCSE

GENMAB A/S

16/04/2024

4:09:55 PM

2,043.00

44

XCSE

GENMAB A/S

16/04/2024

4:12:02 PM

2,046.00

76

CEUX

GENMAB A/S

16/04/2024

4:12:02 PM

2,046.00

11

TQEX

GENMAB A/S

16/04/2024

4:12:02 PM

2,046.00

83

XCSE

GENMAB A/S

16/04/2024

4:12:02 PM

2,046.00

11

AQEU

GENMAB A/S

16/04/2024

4:13:20 PM

2,044.00

63

XCSE

44


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:13:20 PM

2,044.00

8

AQEU

GENMAB A/S

16/04/2024

4:13:20 PM

2,044.00

56

CEUX

GENMAB A/S

16/04/2024

4:13:20 PM

2,044.00

9

TQEX

GENMAB A/S

16/04/2024

4:13:21 PM

2,043.00

48

XCSE

GENMAB A/S

16/04/2024

4:13:21 PM

2,043.00

52

XCSE

GENMAB A/S

16/04/2024

4:13:21 PM

2,043.00

32

XCSE

GENMAB A/S

16/04/2024

4:16:10 PM

2,048.00

22

XCSE

GENMAB A/S

16/04/2024

4:16:10 PM

2,048.00

22

XCSE

GENMAB A/S

16/04/2024

4:16:10 PM

2,048.00

22

XCSE

GENMAB A/S

16/04/2024

4:16:10 PM

2,048.00

22

XCSE

GENMAB A/S

16/04/2024

4:16:10 PM

2,048.00

22

XCSE

GENMAB A/S

16/04/2024

4:16:10 PM

2,048.00

22

XCSE

GENMAB A/S

16/04/2024

4:16:10 PM

2,048.00

4

XCSE

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

10

XCSE

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

5

TQEX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

4

TQEX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

5

TQEX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

5

TQEX

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

10

XCSE

GENMAB A/S

16/04/2024

4:16:55 PM

2,047.00

29

XCSE

GENMAB A/S

16/04/2024

4:16:56 PM

2,047.00

25

XCSE

GENMAB A/S

16/04/2024

4:16:58 PM

2,047.00

3

XCSE

GENMAB A/S

16/04/2024

4:18:15 PM

2,047.00

70

XCSE

GENMAB A/S

16/04/2024

4:18:15 PM

2,047.00

63

CEUX

GENMAB A/S

16/04/2024

4:18:23 PM

2,047.00

9

XCSE

GENMAB A/S

16/04/2024

4:18:23 PM

2,047.00

1

AQEU

GENMAB A/S

16/04/2024

4:18:23 PM

2,047.00

5

CEUX

GENMAB A/S

16/04/2024

4:18:23 PM

2,047.00

9

XCSE

GENMAB A/S

16/04/2024

4:19:19 PM

2,046.00

59

CEUX

GENMAB A/S

16/04/2024

4:19:19 PM

2,046.00

9

TQEX

GENMAB A/S

16/04/2024

4:19:19 PM

2,046.00

66

XCSE

GENMAB A/S

16/04/2024

4:19:19 PM

2,046.00

9

CEUX

GENMAB A/S

16/04/2024

4:20:54 PM

2,045.00

10

AQEU

GENMAB A/S

16/04/2024

4:20:54 PM

2,045.00

72

CEUX

GENMAB A/S

16/04/2024

4:20:54 PM

2,045.00

11

TQEX

45


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:20:54 PM

2,045.00

79

XCSE

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

23

XCSE

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

21

XCSE

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

19

XCSE

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

3

AQEU

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

2

AQEU

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

2

AQEU

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

21

CEUX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

21

CEUX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

15

CEUX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

4

CEUX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

21

CEUX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

5

TQEX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

5

TQEX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

5

TQEX

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

23

XCSE

GENMAB A/S

16/04/2024

4:20:55 PM

2,044.00

14

XCSE

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

7

AQEU

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

37

XCSE

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

33

XCSE

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

2

AQEU

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

10

CEUX

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

7

CEUX

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

9

CEUX

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

16

XCSE

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

20

XCSE

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

16

XCSE

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

20

XCSE

GENMAB A/S

16/04/2024

4:25:25 PM

2,045.00

16

XCSE

GENMAB A/S

16/04/2024

4:25:26 PM

2,045.00

16

XCSE

GENMAB A/S

16/04/2024

4:26:17 PM

2,044.00

2

AQEU

GENMAB A/S

16/04/2024

4:26:17 PM

2,044.00

17

CEUX

GENMAB A/S

16/04/2024

4:26:17 PM

2,044.00

5

TQEX

GENMAB A/S

16/04/2024

4:26:17 PM

2,044.00

17

XCSE

GENMAB A/S

16/04/2024

4:26:17 PM

2,044.00

56

XCSE

GENMAB A/S

16/04/2024

4:26:17 PM

2,044.00

17

CEUX

GENMAB A/S

16/04/2024

4:27:17 PM

2,046.00

10

XCSE

GENMAB A/S

16/04/2024

4:27:17 PM

2,046.00

11

CEUX

GENMAB A/S

16/04/2024

4:27:17 PM

2,046.00

11

CEUX

46


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:28:38 PM

2,047.00

39

AQEU

GENMAB A/S

16/04/2024

4:29:00 PM

2,048.00

9

AQEU

GENMAB A/S

16/04/2024

4:29:00 PM

2,048.00

14

AQEU

GENMAB A/S

16/04/2024

4:29:00 PM

2,048.00

12

AQEU

GENMAB A/S

16/04/2024

4:29:00 PM

2,048.00

3

AQEU

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

11

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

13

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

33

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

3

AQEU

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

2

AQEU

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

21

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

3

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

21

XCSE

GENMAB A/S

16/04/2024

4:29:00 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:02 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:02 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:29:02 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

2

AQEU

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

11

XCSE

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

37

XCSE

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

33

XCSE

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

4

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

10

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

1

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

11

XCSE

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

1

XCSE

47


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

23

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

8

CEUX

GENMAB A/S

16/04/2024

4:30:00 PM

2,047.00

6

CEUX

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

9

AQEU

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

9

AQEU

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

1

AQEU

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

9

AQEU

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

11

AQEU

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

60

CEUX

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

11

CEUX

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

9

TQEX

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

7

TQEX

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

9

TQEX

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

15

TQEX

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

67

XCSE

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

11

XCSE

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

56

XCSE

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

11

XCSE

GENMAB A/S

16/04/2024

4:31:46 PM

2,046.00

45

CEUX

GENMAB A/S

16/04/2024

4:31:47 PM

2,046.00

67

XCSE

GENMAB A/S

16/04/2024

4:34:47 PM

2,056.00

26

CEUX

GENMAB A/S

16/04/2024

4:34:47 PM

2,056.00

35

CEUX

GENMAB A/S

16/04/2024

4:34:47 PM

2,056.00

56

CEUX

GENMAB A/S

16/04/2024

4:34:47 PM

2,056.00

18

TQEX

GENMAB A/S

16/04/2024

4:34:47 PM

2,056.00

17

AQEU

GENMAB A/S

16/04/2024

4:34:47 PM

2,056.00

130

XCSE

GENMAB A/S

16/04/2024

4:37:02 PM

2,056.00

85

XCSE

GENMAB A/S

16/04/2024

4:37:02 PM

2,056.00

11

AQEU

GENMAB A/S

16/04/2024

4:37:02 PM

2,056.00

52

CEUX

GENMAB A/S

16/04/2024

4:37:02 PM

2,056.00

24

CEUX

GENMAB A/S

16/04/2024

4:37:02 PM

2,056.00

12

TQEX

GENMAB A/S

16/04/2024

4:37:02 PM

2,055.00

3

AQEU

GENMAB A/S

16/04/2024

4:37:04 PM

2,056.00

18

TQEX

GENMAB A/S

16/04/2024

4:37:04 PM

2,056.00

17

AQEU

GENMAB A/S

16/04/2024

4:37:04 PM

2,056.00

120

CEUX

GENMAB A/S

16/04/2024

4:39:23 PM

2,058.00

1

AQEU

GENMAB A/S

16/04/2024

4:39:23 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:39:23 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:39:23 PM

2,058.00

4

TQEX

48


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:39:52 PM

2,058.00

1

AQEU

GENMAB A/S

16/04/2024

4:39:52 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:39:52 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:39:52 PM

2,058.00

7

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

1

AQEU

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

6

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

XCSE

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

132

XCSE

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

1

AQEU

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

7

AQEU

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

1

AQEU

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

21

AQEU

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

9

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

13

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

1

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

8

CEUX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

1

AQEU

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

7

AQEU

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:40:32 PM

2,058.00

4

TQEX

GENMAB A/S

16/04/2024

4:40:33 PM

2,058.00

11

CEUX

GENMAB A/S

16/04/2024

4:43:49 PM

2,059.00

13

CEUX

GENMAB A/S

16/04/2024

4:43:55 PM

2,060.00

5

AQEU

GENMAB A/S

16/04/2024

4:43:55 PM

2,060.00

16

AQEU

GENMAB A/S

16/04/2024

4:43:55 PM

2,060.00

14

AQEU

GENMAB A/S

16/04/2024

4:44:10 PM

2,060.00

5

AQEU

49


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:44:13 PM

2,060.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:17 PM

2,060.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:19 PM

2,060.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:19 PM

2,060.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

37

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

33

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

33

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

16

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

30

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

33

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

4

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

44

CEUX

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

16

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

33

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

37

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,059.00

11

XCSE

GENMAB A/S

16/04/2024

4:44:19 PM

2,058.00

41

CEUX

GENMAB A/S

16/04/2024

4:44:20 PM

2,058.00

90

XCSE

GENMAB A/S

16/04/2024

4:44:20 PM

2,058.00

20

XCSE

GENMAB A/S

16/04/2024

4:44:20 PM

2,058.00

20

XCSE

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

20

XCSE

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

19

CEUX

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

65

CEUX

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

8

CEUX

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

11

CEUX

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

20

XCSE

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

3

AQEU

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

19

CEUX

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

18

CEUX

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

3

XCSE

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

7

AQEU

GENMAB A/S

16/04/2024

4:44:21 PM

2,058.00

12

XCSE

GENMAB A/S

16/04/2024

4:48:03 PM

2,046.00

47

XCSE

GENMAB A/S

16/04/2024

4:48:04 PM

2,046.00

47

XCSE

GENMAB A/S

16/04/2024

4:48:04 PM

2,046.00

36

XCSE

50


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:48:23 PM

2,045.00

9

XCSE

GENMAB A/S

16/04/2024

4:48:33 PM

2,046.00

2

AQEU

GENMAB A/S

16/04/2024

4:48:35 PM

2,046.00

12

CEUX

GENMAB A/S

16/04/2024

4:48:35 PM

2,046.00

3

CEUX

GENMAB A/S

16/04/2024

4:48:35 PM

2,046.00

15

CEUX

GENMAB A/S

16/04/2024

4:48:40 PM

2,046.00

15

CEUX

GENMAB A/S

16/04/2024

4:48:40 PM

2,046.00

4

TQEX

GENMAB A/S

16/04/2024

4:48:55 PM

2,046.00

2

AQEU

GENMAB A/S

16/04/2024

4:48:55 PM

2,046.00

15

CEUX

GENMAB A/S

16/04/2024

4:48:55 PM

2,046.00

2

TQEX

GENMAB A/S

16/04/2024

4:49:58 PM

2,046.00

15

CEUX

GENMAB A/S

16/04/2024

4:49:58 PM

2,046.00

6

TQEX

GENMAB A/S

16/04/2024

4:49:59 PM

2,046.00

15

CEUX

GENMAB A/S

16/04/2024

4:49:59 PM

2,046.00

6

TQEX

GENMAB A/S

16/04/2024

4:49:59 PM

2,046.00

15

CEUX

GENMAB A/S

16/04/2024

4:50:15 PM

2,046.00

14

XCSE

GENMAB A/S

16/04/2024

4:50:15 PM

2,046.00

14

XCSE

GENMAB A/S

16/04/2024

4:51:08 PM

2,047.00

9

AQEU

GENMAB A/S

16/04/2024

4:51:08 PM

2,047.00

59

CEUX

GENMAB A/S

16/04/2024

4:51:08 PM

2,047.00

9

TQEX

GENMAB A/S

16/04/2024

4:51:08 PM

2,047.00

66

XCSE

GENMAB A/S

16/04/2024

4:51:08 PM

2,047.00

50

XCSE

GENMAB A/S

16/04/2024

4:51:08 PM

2,047.00

24

XCSE

GENMAB A/S

16/04/2024

4:51:08 PM

2,047.00

24

CEUX

GENMAB A/S

16/04/2024

4:51:17 PM

2,047.00

35

CEUX

GENMAB A/S

16/04/2024

4:51:22 PM

2,046.00

76

XCSE

GENMAB A/S

16/04/2024

4:51:29 PM

2,045.00

8

CEUX

GENMAB A/S

16/04/2024

4:51:29 PM

2,045.00

8

CEUX

GENMAB A/S

16/04/2024

4:51:29 PM

2,045.00

5

TQEX

GENMAB A/S

16/04/2024

4:51:29 PM

2,045.00

8

XCSE

GENMAB A/S

16/04/2024

4:51:35 PM

2,045.00

2

AQEU

GENMAB A/S

16/04/2024

4:51:36 PM

2,045.00

17

CEUX

GENMAB A/S

16/04/2024

4:51:36 PM

2,045.00

18

XCSE

GENMAB A/S

16/04/2024

4:51:41 PM

2,045.00

2

AQEU

GENMAB A/S

16/04/2024

4:51:41 PM

2,045.00

17

CEUX

GENMAB A/S

16/04/2024

4:51:41 PM

2,045.00

17

CEUX

GENMAB A/S

16/04/2024

4:51:41 PM

2,045.00

18

XCSE

GENMAB A/S

16/04/2024

4:51:41 PM

2,045.00

38

XCSE

GENMAB A/S

16/04/2024

4:52:04 PM

2,045.00

5

XCSE

51


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

16/04/2024

4:52:50 PM

2,046.00

18

AQEU

GENMAB A/S

16/04/2024

4:52:50 PM

2,046.00

127

CEUX

GENMAB A/S

16/04/2024

4:52:50 PM

2,046.00

19

TQEX

GENMAB A/S

16/04/2024

4:54:26 PM

2,049.00

26

XCSE

GENMAB A/S

16/04/2024

4:54:26 PM

2,049.00

43

XCSE

GENMAB A/S

16/04/2024

4:54:26 PM

2,049.00

26

XCSE

GENMAB A/S

16/04/2024

4:54:26 PM

2,049.00

26

XCSE

GENMAB A/S

16/04/2024

4:54:27 PM

2,049.00

19

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

7

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

7

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

22

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

19

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

22

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

19

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

10

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

25

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

22

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

25

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

22

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

25

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

22

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

14

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

8

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

19

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

22

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

3

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

18

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

8

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

11

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

19

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

7

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

8

CEUX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

3

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

3

TQEX

52


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

2

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

2

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

4

TQEX

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

25

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

22

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

25

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

16

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

6

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

3

XCSE

GENMAB A/S

17/04/2024

9:00:22 AM

2,055.00

13

XCSE

GENMAB A/S

17/04/2024

9:01:50 AM

2,059.00

42

CEUX

GENMAB A/S

17/04/2024

9:06:57 AM

2,069.00

2

CEUX

GENMAB A/S

17/04/2024

9:07:31 AM

2,066.00

89

XCSE

GENMAB A/S

17/04/2024

9:07:33 AM

2,062.00

42

CEUX

GENMAB A/S

17/04/2024

9:07:33 AM

2,062.00

38

CEUX

GENMAB A/S

17/04/2024

9:07:33 AM

2,062.00

34

CEUX

GENMAB A/S

17/04/2024

9:07:34 AM

2,061.00

75

XCSE

GENMAB A/S

17/04/2024

9:07:34 AM

2,061.00

8

XCSE

GENMAB A/S

17/04/2024

9:07:34 AM

2,061.00

67

XCSE

GENMAB A/S

17/04/2024

9:07:34 AM

2,061.00

10

XCSE

GENMAB A/S

17/04/2024

9:11:29 AM

2,057.00

37

CEUX

GENMAB A/S

17/04/2024

9:11:29 AM

2,056.00

13

CEUX

GENMAB A/S

17/04/2024

9:11:29 AM

2,056.00

78

CEUX

GENMAB A/S

17/04/2024

9:11:29 AM

2,056.00

38

TQEX

GENMAB A/S

17/04/2024

9:11:29 AM

2,056.00

44

TQEX

GENMAB A/S

17/04/2024

9:11:29 AM

2,056.00

6

TQEX

GENMAB A/S

17/04/2024

9:11:29 AM

2,056.00

5

TQEX

GENMAB A/S

17/04/2024

9:17:14 AM

2,057.00

24

XCSE

GENMAB A/S

17/04/2024

9:17:14 AM

2,057.00

13

XCSE

GENMAB A/S

17/04/2024

9:17:14 AM

2,057.00

24

XCSE

GENMAB A/S

17/04/2024

9:17:14 AM

2,057.00

30

XCSE

53


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

9:17:14 AM

2,057.00

2

XCSE

GENMAB A/S

17/04/2024

9:18:42 AM

2,058.00

55

XCSE

GENMAB A/S

17/04/2024

9:18:42 AM

2,058.00

50

CEUX

GENMAB A/S

17/04/2024

9:18:42 AM

2,058.00

8

TQEX

GENMAB A/S

17/04/2024

9:19:37 AM

2,057.00

81

CEUX

GENMAB A/S

17/04/2024

9:19:37 AM

2,056.00

41

CEUX

GENMAB A/S

17/04/2024

9:19:37 AM

2,056.00

20

CEUX

GENMAB A/S

17/04/2024

9:19:37 AM

2,056.00

25

CEUX

GENMAB A/S

17/04/2024

9:19:37 AM

2,056.00

41

CEUX

GENMAB A/S

17/04/2024

9:19:37 AM

2,056.00

52

XCSE

GENMAB A/S

17/04/2024

9:19:37 AM

2,056.00

52

XCSE

GENMAB A/S

17/04/2024

9:19:37 AM

2,056.00

3

CEUX

GENMAB A/S

17/04/2024

9:25:30 AM

2,056.00

26

CEUX

GENMAB A/S

17/04/2024

9:25:30 AM

2,056.00

8

CEUX

GENMAB A/S

17/04/2024

9:27:14 AM

2,053.00

43

XCSE

GENMAB A/S

17/04/2024

9:27:14 AM

2,053.00

51

XCSE

GENMAB A/S

17/04/2024

9:30:19 AM

2,055.00

26

XCSE

GENMAB A/S

17/04/2024

9:30:19 AM

2,055.00

26

XCSE

GENMAB A/S

17/04/2024

9:30:19 AM

2,055.00

26

XCSE

GENMAB A/S

17/04/2024

9:30:19 AM

2,055.00

21

XCSE

GENMAB A/S

17/04/2024

9:31:22 AM

2,056.00

44

XCSE

GENMAB A/S

17/04/2024

9:31:22 AM

2,056.00

6

AQEU

GENMAB A/S

17/04/2024

9:31:22 AM

2,056.00

39

CEUX

GENMAB A/S

17/04/2024

9:31:22 AM

2,056.00

6

TQEX

GENMAB A/S

17/04/2024

9:31:59 AM

2,051.00

45

XCSE

GENMAB A/S

17/04/2024

9:34:27 AM

2,050.00

24

XCSE

GENMAB A/S

17/04/2024

9:34:27 AM

2,050.00

24

XCSE

GENMAB A/S

17/04/2024

9:34:27 AM

2,050.00

24

XCSE

GENMAB A/S

17/04/2024

9:34:27 AM

2,050.00

30

XCSE

GENMAB A/S

17/04/2024

9:34:27 AM

2,050.00

14

XCSE

GENMAB A/S

17/04/2024

9:36:02 AM

2,047.00

50

XCSE

GENMAB A/S

17/04/2024

9:36:02 AM

2,047.00

10

XCSE

GENMAB A/S

17/04/2024

9:36:02 AM

2,047.00

40

XCSE

GENMAB A/S

17/04/2024

9:36:02 AM

2,047.00

7

XCSE

GENMAB A/S

17/04/2024

9:38:22 AM

2,043.00

23

XCSE

GENMAB A/S

17/04/2024

9:38:22 AM

2,043.00

23

XCSE

GENMAB A/S

17/04/2024

9:38:22 AM

2,043.00

23

XCSE

GENMAB A/S

17/04/2024

9:38:22 AM

2,043.00

25

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,044.00

24

XCSE

54


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

9:40:29 AM

2,044.00

24

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,044.00

24

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,044.00

24

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,044.00

8

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,043.00

23

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,043.00

37

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,043.00

23

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,043.00

15

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,043.00

8

XCSE

GENMAB A/S

17/04/2024

9:40:29 AM

2,043.00

2

XCSE

GENMAB A/S

17/04/2024

9:44:38 AM

2,040.00

7

AQEU

GENMAB A/S

17/04/2024

9:44:38 AM

2,040.00

35

CEUX

GENMAB A/S

17/04/2024

9:44:38 AM

2,040.00

73

AQEU

GENMAB A/S

17/04/2024

9:44:39 AM

2,038.00

57

XCSE

GENMAB A/S

17/04/2024

9:44:39 AM

2,038.00

27

XCSE

GENMAB A/S

17/04/2024

9:44:39 AM

2,038.00

3

XCSE

GENMAB A/S

17/04/2024

9:44:39 AM

2,038.00

78

XCSE

GENMAB A/S

17/04/2024

9:48:46 AM

2,034.00

75

XCSE

GENMAB A/S

17/04/2024

9:48:46 AM

2,034.00

5

XCSE

GENMAB A/S

17/04/2024

9:53:55 AM

2,033.00

23

XCSE

GENMAB A/S

17/04/2024

9:53:55 AM

2,033.00

1

XCSE

GENMAB A/S

17/04/2024

9:53:55 AM

2,033.00

24

XCSE

GENMAB A/S

17/04/2024

9:53:55 AM

2,033.00

24

XCSE

GENMAB A/S

17/04/2024

9:53:55 AM

2,033.00

21

XCSE

GENMAB A/S

17/04/2024

9:55:26 AM

2,035.00

82

CEUX

GENMAB A/S

17/04/2024

9:59:51 AM

2,037.00

1

CEUX

GENMAB A/S

17/04/2024

9:59:51 AM

2,037.00

26

CEUX

GENMAB A/S

17/04/2024

10:00:10 AM

2,039.00

57

XCSE

GENMAB A/S

17/04/2024

10:00:10 AM

2,039.00

79

XCSE

GENMAB A/S

17/04/2024

10:00:10 AM

2,038.00

66

XCSE

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

CEUX

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

CEUX

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

CEUX

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

XCSE

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

XCSE

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

50

XCSE

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

CEUX

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

CEUX

GENMAB A/S

17/04/2024

10:03:39 AM

2,040.00

11

CEUX

55


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

10:03:43 AM

2,038.00

63

XCSE

GENMAB A/S

17/04/2024

10:03:43 AM

2,038.00

14

XCSE

GENMAB A/S

17/04/2024

10:10:52 AM

2,037.00

20

AQEU

GENMAB A/S

17/04/2024

10:10:52 AM

2,037.00

20

TQEX

GENMAB A/S

17/04/2024

10:10:52 AM

2,037.00

2

TQEX

GENMAB A/S

17/04/2024

10:10:52 AM

2,037.00

159

XCSE

GENMAB A/S

17/04/2024

10:15:33 AM

2,036.00

21

XCSE

GENMAB A/S

17/04/2024

10:15:33 AM

2,036.00

21

XCSE

GENMAB A/S

17/04/2024

10:15:33 AM

2,036.00

85

XCSE

GENMAB A/S

17/04/2024

10:15:33 AM

2,036.00

22

XCSE

GENMAB A/S

17/04/2024

10:17:21 AM

2,029.00

54

CEUX

GENMAB A/S

17/04/2024

10:17:21 AM

2,029.00

18

CEUX

GENMAB A/S

17/04/2024

10:17:21 AM

2,030.00

24

CEUX

GENMAB A/S

17/04/2024

10:17:21 AM

2,030.00

24

CEUX

GENMAB A/S

17/04/2024

10:17:21 AM

2,030.00

15

CEUX

GENMAB A/S

17/04/2024

10:17:21 AM

2,029.00

40

XCSE

GENMAB A/S

17/04/2024

10:17:21 AM

2,029.00

24

XCSE

GENMAB A/S

17/04/2024

10:17:21 AM

2,029.00

39

CEUX

GENMAB A/S

17/04/2024

10:25:02 AM

2,026.00

66

XCSE

GENMAB A/S

17/04/2024

10:25:02 AM

2,026.00

66

TQEX

GENMAB A/S

17/04/2024

10:29:11 AM

2,032.00

34

XCSE

GENMAB A/S

17/04/2024

10:29:11 AM

2,032.00

42

XCSE

GENMAB A/S

17/04/2024

10:30:22 AM

2,031.00

52

AQEU

GENMAB A/S

17/04/2024

10:30:22 AM

2,031.00

20

AQEU

GENMAB A/S

17/04/2024

10:30:22 AM

2,030.00

70

XCSE

GENMAB A/S

17/04/2024

10:30:22 AM

2,030.00

71

XCSE

GENMAB A/S

17/04/2024

10:30:22 AM

2,030.00

35

XCSE

GENMAB A/S

17/04/2024

10:36:41 AM

2,034.00

91

XCSE

GENMAB A/S

17/04/2024

10:36:42 AM

2,033.00

1

CEUX

GENMAB A/S

17/04/2024

10:37:51 AM

2,029.00

42

XCSE

GENMAB A/S

17/04/2024

10:37:51 AM

2,029.00

14

XCSE

GENMAB A/S

17/04/2024

10:37:51 AM

2,029.00

20

XCSE

GENMAB A/S

17/04/2024

10:37:51 AM

2,029.00

8

XCSE

GENMAB A/S

17/04/2024

10:37:51 AM

2,029.00

28

XCSE

GENMAB A/S

17/04/2024

10:39:47 AM

2,029.00

29

TQEX

GENMAB A/S

17/04/2024

10:39:47 AM

2,029.00

63

TQEX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

32

XCSE

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

4

AQEU

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

1

AQEU

56


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

5

AQEU

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

31

CEUX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

30

CEUX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

4

TQEX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

1

TQEX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

4

TQEX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

32

XCSE

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

8

CEUX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

35

CEUX

GENMAB A/S

17/04/2024

10:44:03 AM

2,030.00

19

CEUX

GENMAB A/S

17/04/2024

10:48:14 AM

2,029.00

22

XCSE

GENMAB A/S

17/04/2024

10:48:14 AM

2,029.00

109

XCSE

GENMAB A/S

17/04/2024

10:48:14 AM

2,029.00

10

AQEU

GENMAB A/S

17/04/2024

10:48:14 AM

2,029.00

7

AQEU

GENMAB A/S

17/04/2024

10:48:14 AM

2,029.00

70

CEUX

GENMAB A/S

17/04/2024

10:48:14 AM

2,029.00

47

CEUX

GENMAB A/S

17/04/2024

10:48:14 AM

2,029.00

18

TQEX

GENMAB A/S

17/04/2024

10:51:45 AM

2,028.00

81

XCSE

GENMAB A/S

17/04/2024

10:55:51 AM

2,026.00

22

CEUX

GENMAB A/S

17/04/2024

10:55:51 AM

2,026.00

22

CEUX

GENMAB A/S

17/04/2024

10:55:51 AM

2,026.00

22

CEUX

GENMAB A/S

17/04/2024

10:55:51 AM

2,026.00

16

CEUX

GENMAB A/S

17/04/2024

11:00:16 AM

2,026.00

40

XCSE

GENMAB A/S

17/04/2024

11:00:16 AM

2,026.00

27

XCSE

GENMAB A/S

17/04/2024

11:00:16 AM

2,026.00

43

XCSE

GENMAB A/S

17/04/2024

11:00:16 AM

2,026.00

43

XCSE

GENMAB A/S

17/04/2024

11:00:16 AM

2,026.00

44

XCSE

GENMAB A/S

17/04/2024

11:00:16 AM

2,026.00

17

XCSE

GENMAB A/S

17/04/2024

11:01:30 AM

2,025.00

25

XCSE

GENMAB A/S

17/04/2024

11:01:30 AM

2,025.00

25

XCSE

GENMAB A/S

17/04/2024

11:01:30 AM

2,025.00

38

XCSE

GENMAB A/S

17/04/2024

11:01:30 AM

2,024.00

41

CEUX

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

10

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

76

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

21

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

21

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

16

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

1

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

20

XCSE

57


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

11:07:43 AM

2,029.00

6

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,028.00

24

CEUX

GENMAB A/S

17/04/2024

11:07:43 AM

2,028.00

46

XCSE

GENMAB A/S

17/04/2024

11:07:43 AM

2,028.00

24

CEUX

GENMAB A/S

17/04/2024

11:07:43 AM

2,028.00

24

CEUX

GENMAB A/S

17/04/2024

11:07:43 AM

2,028.00

15

CEUX

GENMAB A/S

17/04/2024

11:09:51 AM

2,021.00

1

CEUX

GENMAB A/S

17/04/2024

11:09:51 AM

2,021.00

44

CEUX

GENMAB A/S

17/04/2024

11:09:51 AM

2,021.00

1

CEUX

GENMAB A/S

17/04/2024

11:09:51 AM

2,021.00

17

CEUX

GENMAB A/S

17/04/2024

11:09:51 AM

2,021.00

28

CEUX

GENMAB A/S

17/04/2024

11:09:51 AM

2,021.00

1

CEUX

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

49

XCSE

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

2

TQEX

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

7

AQEU

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

7

AQEU

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

7

AQEU

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

18

CEUX

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

7

CEUX

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

20

CEUX

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

4

TQEX

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

4

TQEX

GENMAB A/S

17/04/2024

11:17:08 AM

2,019.00

49

XCSE

GENMAB A/S

17/04/2024

11:17:11 AM

2,019.00

2

AQEU

GENMAB A/S

17/04/2024

11:17:14 AM

2,018.00

27

XCSE

GENMAB A/S

17/04/2024

11:17:14 AM

2,018.00

1

XCSE

GENMAB A/S

17/04/2024

11:17:14 AM

2,018.00

14

XCSE

GENMAB A/S

17/04/2024

11:17:14 AM

2,018.00

1

XCSE

GENMAB A/S

17/04/2024

11:17:14 AM

2,018.00

42

XCSE

GENMAB A/S

17/04/2024

11:17:14 AM

2,018.00

31

XCSE

GENMAB A/S

17/04/2024

11:22:25 AM

2,009.00

58

XCSE

GENMAB A/S

17/04/2024

11:22:25 AM

2,009.00

35

XCSE

GENMAB A/S

17/04/2024

11:22:25 AM

2,009.00

89

CEUX

GENMAB A/S

17/04/2024

11:29:23 AM

2,011.00

8

XCSE

GENMAB A/S

17/04/2024

11:29:23 AM

2,011.00

71

XCSE

GENMAB A/S

17/04/2024

11:29:28 AM

2,011.00

36

CEUX

GENMAB A/S

17/04/2024

11:29:28 AM

2,011.00

31

CEUX

GENMAB A/S

17/04/2024

11:29:28 AM

2,011.00

6

TQEX

GENMAB A/S

17/04/2024

11:29:28 AM

2,011.00

39

XCSE

58


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

11:29:29 AM

2,011.00

71

CEUX

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

CEUX

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

CEUX

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

XCSE

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

2

XCSE

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

XCSE

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

XCSE

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

CEUX

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

CEUX

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

CEUX

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

XCSE

GENMAB A/S

17/04/2024

11:37:08 AM

2,014.00

13

CEUX

GENMAB A/S

17/04/2024

11:37:09 AM

2,014.00

7

CEUX

GENMAB A/S

17/04/2024

11:37:09 AM

2,014.00

13

XCSE

GENMAB A/S

17/04/2024

11:37:09 AM

2,014.00

26

CEUX

GENMAB A/S

17/04/2024

11:40:00 AM

2,017.00

1

AQEU

GENMAB A/S

17/04/2024

11:40:00 AM

2,017.00

38

AQEU

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

10

XCSE

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

81

XCSE

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

10

XCSE

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

22

XCSE

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

2

AQEU

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

9

CEUX

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

5

TQEX

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

5

TQEX

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

14

TQEX

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

5

TQEX

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

12

TQEX

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

26

XCSE

GENMAB A/S

17/04/2024

11:41:05 AM

2,017.00

4

XCSE

GENMAB A/S

17/04/2024

11:45:14 AM

2,018.00

26

XCSE

GENMAB A/S

17/04/2024

11:45:14 AM

2,018.00

26

XCSE

GENMAB A/S

17/04/2024

11:45:14 AM

2,018.00

25

XCSE

GENMAB A/S

17/04/2024

11:47:36 AM

2,017.00

7

AQEU

GENMAB A/S

17/04/2024

11:47:36 AM

2,017.00

2

AQEU

GENMAB A/S

17/04/2024

11:47:36 AM

2,017.00

65

CEUX

GENMAB A/S

17/04/2024

11:47:36 AM

2,017.00

10

TQEX

GENMAB A/S

17/04/2024

11:47:36 AM

2,017.00

65

XCSE

GENMAB A/S

17/04/2024

11:47:36 AM

2,017.00

21

XCSE

59


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

11:47:36 AM

2,017.00

72

XCSE

GENMAB A/S

17/04/2024

11:47:36 AM

2,016.00

10

XCSE

GENMAB A/S

17/04/2024

11:47:36 AM

2,016.00

87

XCSE

GENMAB A/S

17/04/2024

11:51:14 AM

2,017.00

84

XCSE

GENMAB A/S

17/04/2024

11:58:06 AM

2,015.00

10

CEUX

GENMAB A/S

17/04/2024

11:58:06 AM

2,015.00

3

CEUX

GENMAB A/S

17/04/2024

11:58:06 AM

2,015.00

7

CEUX

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

8

AQEU

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

47

CEUX

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

28

CEUX

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

25

CEUX

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

8

TQEX

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

38

XCSE

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

31

XCSE

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

66

XCSE

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

34

XCSE

GENMAB A/S

17/04/2024

11:59:52 AM

2,015.00

24

XCSE

GENMAB A/S

17/04/2024

11:59:54 AM

2,014.00

52

XCSE

GENMAB A/S

17/04/2024

11:59:54 AM

2,014.00

48

XCSE

GENMAB A/S

17/04/2024

12:00:03 PM

2,014.00

29

XCSE

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

7

AQEU

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

8

AQEU

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

3

TQEX

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

84

XCSE

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

53

XCSE

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

6

TQEX

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

2

CEUX

GENMAB A/S

17/04/2024

12:05:11 PM

2,015.00

1

CEUX

GENMAB A/S

17/04/2024

12:05:12 PM

2,015.00

1

CEUX

GENMAB A/S

17/04/2024

12:07:42 PM

2,014.00

2

CEUX

GENMAB A/S

17/04/2024

12:07:42 PM

2,014.00

38

CEUX

GENMAB A/S

17/04/2024

12:09:46 PM

2,011.00

85

CEUX

GENMAB A/S

17/04/2024

12:09:46 PM

2,011.00

84

XCSE

GENMAB A/S

17/04/2024

12:11:12 PM

2,004.00

43

XCSE

GENMAB A/S

17/04/2024

12:16:59 PM

2,007.00

78

XCSE

GENMAB A/S

17/04/2024

12:16:59 PM

2,006.00

6

CEUX

GENMAB A/S

17/04/2024

12:16:59 PM

2,006.00

4

CEUX

GENMAB A/S

17/04/2024

12:17:00 PM

2,006.00

65

CEUX

GENMAB A/S

17/04/2024

12:17:00 PM

2,006.00

10

TQEX

60


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

12:17:00 PM

2,006.00

36

TQEX

GENMAB A/S

17/04/2024

12:19:52 PM

2,006.00

31

XCSE

GENMAB A/S

17/04/2024

12:19:52 PM

2,006.00

31

XCSE

GENMAB A/S

17/04/2024

12:19:52 PM

2,006.00

34

XCSE

GENMAB A/S

17/04/2024

12:19:52 PM

2,006.00

31

XCSE

GENMAB A/S

17/04/2024

12:19:52 PM

2,006.00

17

XCSE

GENMAB A/S

17/04/2024

12:25:18 PM

2,012.00

41

CEUX

GENMAB A/S

17/04/2024

12:25:18 PM

2,012.00

36

CEUX

GENMAB A/S

17/04/2024

12:25:18 PM

2,012.00

5

CEUX

GENMAB A/S

17/04/2024

12:25:18 PM

2,012.00

2

CEUX

GENMAB A/S

17/04/2024

12:25:18 PM

2,012.00

3

CEUX

GENMAB A/S

17/04/2024

12:30:25 PM

2,015.00

56

AQEU

GENMAB A/S

17/04/2024

12:30:25 PM

2,015.00

21

AQEU

GENMAB A/S

17/04/2024

12:30:25 PM

2,014.00

80

XCSE

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

38

XCSE

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

5

AQEU

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

8

AQEU

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

34

CEUX

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

4

CEUX

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

19

CEUX

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

6

TQEX

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

6

TQEX

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

5

CEUX

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

12

XCSE

GENMAB A/S

17/04/2024

12:33:57 PM

2,014.00

29

AQEU

GENMAB A/S

17/04/2024

12:37:28 PM

2,013.00

17

XCSE

GENMAB A/S

17/04/2024

12:37:28 PM

2,013.00

1

XCSE

GENMAB A/S

17/04/2024

12:37:28 PM

2,013.00

6

XCSE

GENMAB A/S

17/04/2024

12:37:28 PM

2,013.00

1

XCSE

GENMAB A/S

17/04/2024

12:37:28 PM

2,013.00

6

XCSE

GENMAB A/S

17/04/2024

12:39:20 PM

2,013.00

125

XCSE

GENMAB A/S

17/04/2024

12:39:20 PM

2,013.00

16

AQEU

GENMAB A/S

17/04/2024

12:39:20 PM

2,013.00

102

CEUX

GENMAB A/S

17/04/2024

12:39:20 PM

2,013.00

11

CEUX

GENMAB A/S

17/04/2024

12:39:20 PM

2,013.00

17

TQEX

GENMAB A/S

17/04/2024

12:39:20 PM

2,012.00

71

XCSE

GENMAB A/S

17/04/2024

12:39:20 PM

2,012.00

16

XCSE

GENMAB A/S

17/04/2024

12:45:17 PM

2,009.00

9

CEUX

61


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

12:45:17 PM

2,009.00

8

CEUX

GENMAB A/S

17/04/2024

12:45:47 PM

2,009.00

9

CEUX

GENMAB A/S

17/04/2024

12:45:47 PM

2,009.00

5

TQEX

GENMAB A/S

17/04/2024

12:45:47 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

12:50:12 PM

2,010.00

1

AQEU

GENMAB A/S

17/04/2024

12:50:12 PM

2,010.00

15

AQEU

GENMAB A/S

17/04/2024

12:50:12 PM

2,010.00

7

AQEU

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

24

XCSE

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

3

AQEU

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

17

CEUX

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

5

CEUX

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

17

CEUX

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

5

TQEX

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

73

TQEX

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

11

TQEX

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

5

TQEX

GENMAB A/S

17/04/2024

12:50:30 PM

2,008.00

31

TQEX

GENMAB A/S

17/04/2024

12:51:42 PM

2,008.00

38

CEUX

GENMAB A/S

17/04/2024

12:51:42 PM

2,008.00

9

AQEU

GENMAB A/S

17/04/2024

12:51:42 PM

2,008.00

24

CEUX

GENMAB A/S

17/04/2024

12:51:42 PM

2,008.00

10

TQEX

GENMAB A/S

17/04/2024

12:51:42 PM

2,008.00

40

XCSE

GENMAB A/S

17/04/2024

12:51:42 PM

2,008.00

30

XCSE

GENMAB A/S

17/04/2024

12:51:42 PM

2,007.00

39

CEUX

GENMAB A/S

17/04/2024

12:51:42 PM

2,007.00

42

CEUX

GENMAB A/S

17/04/2024

12:54:31 PM

2,006.00

3

CEUX

GENMAB A/S

17/04/2024

12:55:49 PM

2,006.00

46

XCSE

GENMAB A/S

17/04/2024

12:55:49 PM

2,006.00

46

XCSE

GENMAB A/S

17/04/2024

12:55:49 PM

2,006.00

12

AQEU

GENMAB A/S

17/04/2024

12:55:49 PM

2,006.00

75

CEUX

GENMAB A/S

17/04/2024

12:55:49 PM

2,006.00

8

CEUX

GENMAB A/S

17/04/2024

12:55:49 PM

2,006.00

13

TQEX

GENMAB A/S

17/04/2024

12:58:32 PM

2,007.00

29

XCSE

GENMAB A/S

17/04/2024

12:58:32 PM

2,007.00

61

XCSE

GENMAB A/S

17/04/2024

12:58:32 PM

2,007.00

43

XCSE

GENMAB A/S

17/04/2024

12:58:32 PM

2,007.00

13

XCSE

GENMAB A/S

17/04/2024

12:58:32 PM

2,007.00

33

XCSE

GENMAB A/S

17/04/2024

1:05:35 PM

2,005.00

24

XCSE

GENMAB A/S

17/04/2024

1:05:35 PM

2,005.00

24

XCSE

62


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

1:05:36 PM

2,005.00

2

XCSE

GENMAB A/S

17/04/2024

1:05:36 PM

2,005.00

4

XCSE

GENMAB A/S

17/04/2024

1:05:36 PM

2,005.00

8

XCSE

GENMAB A/S

17/04/2024

1:08:40 PM

2,006.00

7

AQEU

GENMAB A/S

17/04/2024

1:08:40 PM

2,006.00

48

CEUX

GENMAB A/S

17/04/2024

1:08:40 PM

2,006.00

48

CEUX

GENMAB A/S

17/04/2024

1:08:40 PM

2,006.00

28

XCSE

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

25

XCSE

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

4

AQEU

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

3

AQEU

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

4

AQEU

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

41

CEUX

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

8

TQEX

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

8

TQEX

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

32

XCSE

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

21

XCSE

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

21

XCSE

GENMAB A/S

17/04/2024

1:08:51 PM

2,006.00

22

XCSE

GENMAB A/S

17/04/2024

1:13:34 PM

2,009.00

3

CEUX

GENMAB A/S

17/04/2024

1:13:34 PM

2,009.00

61

CEUX

GENMAB A/S

17/04/2024

1:13:34 PM

2,009.00

45

CEUX

GENMAB A/S

17/04/2024

1:13:34 PM

2,009.00

120

XCSE

GENMAB A/S

17/04/2024

1:18:59 PM

2,010.00

81

XCSE

GENMAB A/S

17/04/2024

1:18:59 PM

2,010.00

72

CEUX

GENMAB A/S

17/04/2024

1:18:59 PM

2,010.00

11

TQEX

GENMAB A/S

17/04/2024

1:18:59 PM

2,010.00

11

CEUX

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

22

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

13

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

9

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

22

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

22

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

22

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

22

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

22

XCSE

GENMAB A/S

17/04/2024

1:20:58 PM

2,009.00

1

XCSE

GENMAB A/S

17/04/2024

1:23:49 PM

2,009.00

9

CEUX

GENMAB A/S

17/04/2024

1:24:59 PM

2,008.00

66

XCSE

GENMAB A/S

17/04/2024

1:24:59 PM

2,008.00

9

AQEU

GENMAB A/S

17/04/2024

1:24:59 PM

2,008.00

60

CEUX

63


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

1:24:59 PM

2,008.00

9

TQEX

GENMAB A/S

17/04/2024

1:31:18 PM

2,007.00

74

XCSE

GENMAB A/S

17/04/2024

1:31:18 PM

2,007.00

10

AQEU

GENMAB A/S

17/04/2024

1:31:18 PM

2,007.00

66

CEUX

GENMAB A/S

17/04/2024

1:31:18 PM

2,007.00

10

TQEX

GENMAB A/S

17/04/2024

1:31:18 PM

2,006.00

83

CEUX

GENMAB A/S

17/04/2024

1:31:18 PM

2,006.00

67

XCSE

GENMAB A/S

17/04/2024

1:31:18 PM

2,006.00

9

XCSE

GENMAB A/S

17/04/2024

1:31:18 PM

2,006.00

7

XCSE

GENMAB A/S

17/04/2024

1:35:04 PM

2,003.00

62

CEUX

GENMAB A/S

17/04/2024

1:35:04 PM

2,003.00

91

XCSE

GENMAB A/S

17/04/2024

1:44:28 PM

2,004.00

35

CEUX

GENMAB A/S

17/04/2024

1:44:53 PM

2,003.00

75

CEUX

GENMAB A/S

17/04/2024

1:44:53 PM

2,003.00

4

CEUX

GENMAB A/S

17/04/2024

1:44:53 PM

2,003.00

12

TQEX

GENMAB A/S

17/04/2024

1:44:53 PM

2,003.00

89

XCSE

GENMAB A/S

17/04/2024

1:44:55 PM

2,003.00

12

XCSE

GENMAB A/S

17/04/2024

1:49:25 PM

2,006.00

40

CEUX

GENMAB A/S

17/04/2024

1:50:52 PM

2,012.00

13

CEUX

GENMAB A/S

17/04/2024

1:50:52 PM

2,012.00

26

CEUX

GENMAB A/S

17/04/2024

1:51:09 PM

2,012.00

36

CEUX

GENMAB A/S

17/04/2024

1:51:09 PM

2,012.00

2

XCSE

GENMAB A/S

17/04/2024

1:51:53 PM

2,014.00

34

XCSE

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

9

CEUX

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

5

TQEX

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

5

TQEX

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

5

TQEX

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

8

XCSE

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

8

XCSE

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

8

XCSE

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

9

CEUX

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

5

TQEX

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

9

CEUX

GENMAB A/S

17/04/2024

1:52:39 PM

2,013.00

5

TQEX

GENMAB A/S

17/04/2024

1:54:25 PM

2,016.00

15

XCSE

GENMAB A/S

17/04/2024

1:54:25 PM

2,016.00

24

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

6

AQEU

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

20

CEUX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

17

CEUX

64


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

20

CEUX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

41

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

2

AQEU

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

37

CEUX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

37

CEUX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

4

CEUX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

41

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

5

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

22

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

14

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

26

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

4

AQEU

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

2

AQEU

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

34

XCSE

GENMAB A/S

17/04/2024

1:54:31 PM

2,014.00

7

XCSE

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

3

AQEU

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

22

CEUX

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

8

CEUX

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

18

CEUX

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

4

CEUX

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

23

XCSE

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

14

XCSE

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

9

XCSE

GENMAB A/S

17/04/2024

2:00:24 PM

2,011.00

13

XCSE

GENMAB A/S

17/04/2024

2:00:26 PM

2,011.00

38

XCSE

GENMAB A/S

17/04/2024

2:05:10 PM

2,006.00

84

XCSE

GENMAB A/S

17/04/2024

2:05:10 PM

2,006.00

75

CEUX

GENMAB A/S

17/04/2024

2:05:10 PM

2,006.00

6

CEUX

GENMAB A/S

17/04/2024

2:09:52 PM

2,008.00

32

CEUX

GENMAB A/S

17/04/2024

2:09:52 PM

2,008.00

8

CEUX

GENMAB A/S

17/04/2024

2:10:31 PM

2,006.00

17

AQEU

GENMAB A/S

17/04/2024

2:10:31 PM

2,006.00

75

CEUX

GENMAB A/S

17/04/2024

2:10:31 PM

2,006.00

42

CEUX

GENMAB A/S

17/04/2024

2:10:31 PM

2,006.00

18

TQEX

65


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

2:10:31 PM

2,006.00

131

XCSE

GENMAB A/S

17/04/2024

2:10:41 PM

2,005.00

49

XCSE

GENMAB A/S

17/04/2024

2:10:41 PM

2,005.00

49

XCSE

GENMAB A/S

17/04/2024

2:12:09 PM

2,004.00

46

XCSE

GENMAB A/S

17/04/2024

2:12:09 PM

2,004.00

41

XCSE

GENMAB A/S

17/04/2024

2:12:09 PM

2,004.00

23

XCSE

GENMAB A/S

17/04/2024

2:12:09 PM

2,004.00

14

XCSE

GENMAB A/S

17/04/2024

2:12:09 PM

2,004.00

15

XCSE

GENMAB A/S

17/04/2024

2:12:09 PM

2,004.00

41

XCSE

GENMAB A/S

17/04/2024

2:12:09 PM

2,004.00

10

XCSE

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

11

CEUX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

7

CEUX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

4

CEUX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

7

CEUX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

10

XCSE

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

10

XCSE

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

13

XCSE

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

11

CEUX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

5

CEUX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:21:56 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:25:01 PM

2,008.00

19

CEUX

GENMAB A/S

17/04/2024

2:25:01 PM

2,008.00

17

CEUX

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

11

CEUX

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

11

CEUX

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

2

CEUX

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

10

XCSE

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

34

XCSE

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

17

XCSE

GENMAB A/S

17/04/2024

2:25:29 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

2:25:30 PM

2,007.00

12

XCSE

GENMAB A/S

17/04/2024

2:25:30 PM

2,007.00

9

XCSE

GENMAB A/S

17/04/2024

2:25:30 PM

2,007.00

6

XCSE

GENMAB A/S

17/04/2024

2:25:30 PM

2,007.00

32

XCSE

66


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

2:27:02 PM

2,006.00

42

XCSE

GENMAB A/S

17/04/2024

2:27:02 PM

2,006.00

42

XCSE

GENMAB A/S

17/04/2024

2:27:02 PM

2,006.00

10

XCSE

GENMAB A/S

17/04/2024

2:27:02 PM

2,006.00

7

XCSE

GENMAB A/S

17/04/2024

2:27:02 PM

2,005.00

5

TQEX

GENMAB A/S

17/04/2024

2:27:02 PM

2,005.00

2

AQEU

GENMAB A/S

17/04/2024

2:27:02 PM

2,005.00

2

AQEU

GENMAB A/S

17/04/2024

2:27:02 PM

2,005.00

5

TQEX

GENMAB A/S

17/04/2024

2:27:02 PM

2,005.00

5

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

7

AQEU

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

1

AQEU

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

7

AQEU

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

35

CEUX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

13

CEUX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

11

CEUX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

11

CEUX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

11

CEUX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

5

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

6

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

8

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

5

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

5

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

12

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

5

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

3

TQEX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

53

XCSE

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

10

XCSE

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

10

XCSE

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

25

XCSE

GENMAB A/S

17/04/2024

2:29:24 PM

2,004.00

36

CEUX

GENMAB A/S

17/04/2024

2:29:24 PM

2,005.00

4

CEUX

GENMAB A/S

17/04/2024

2:29:24 PM

2,004.00

8

AQEU

GENMAB A/S

17/04/2024

2:30:02 PM

2,003.00

21

XCSE

GENMAB A/S

17/04/2024

2:30:02 PM

2,003.00

21

XCSE

GENMAB A/S

17/04/2024

2:30:03 PM

2,003.00

7

XCSE

GENMAB A/S

17/04/2024

2:30:03 PM

2,003.00

10

XCSE

GENMAB A/S

17/04/2024

2:30:03 PM

2,003.00

4

XCSE

GENMAB A/S

17/04/2024

2:30:03 PM

2,003.00

43

XCSE

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

13

XCSE

67


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

3

XCSE

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

6

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

5

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

1

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

5

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

6

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

6

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

6

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

5

AQEU

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

36

CEUX

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

17

CEUX

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

8

CEUX

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

11

CEUX

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

3

CEUX

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

22

CEUX

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

24

XCSE

GENMAB A/S

17/04/2024

2:38:21 PM

2,004.00

3

XCSE

GENMAB A/S

17/04/2024

2:40:30 PM

2,009.00

3

AQEU

GENMAB A/S

17/04/2024

2:40:30 PM

2,009.00

20

CEUX

GENMAB A/S

17/04/2024

2:40:30 PM

2,009.00

17

XCSE

GENMAB A/S

17/04/2024

2:42:21 PM

2,010.00

6

XCSE

GENMAB A/S

17/04/2024

2:42:47 PM

2,011.00

41

CEUX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

33

XCSE

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

106

XCSE

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

52

XCSE

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

11

XCSE

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

5

AQEU

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

14

AQEU

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

5

AQEU

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

36

CEUX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

33

CEUX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

62

CEUX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

13

CEUX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

23

CEUX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

23

CEUX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

6

TQEX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

14

TQEX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

5

AQEU

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

19

AQEU

68


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

5

AQEU

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

6

TQEX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

8

TQEX

GENMAB A/S

17/04/2024

2:42:47 PM

2,010.00

21

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

17

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

17

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

12

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

17

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

18

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

34

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

18

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

4

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

18

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

30

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

17

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

17

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

2

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

9

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

8

CEUX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

5

TQEX

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

18

XCSE

GENMAB A/S

17/04/2024

2:48:10 PM

2,012.00

1

XCSE

GENMAB A/S

17/04/2024

2:51:37 PM

2,009.00

27

XCSE

GENMAB A/S

17/04/2024

2:56:22 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

2:57:38 PM

2,017.00

12

XCSE

GENMAB A/S

17/04/2024

2:58:07 PM

2,016.00

61

XCSE

GENMAB A/S

17/04/2024

2:58:07 PM

2,016.00

61

XCSE

GENMAB A/S

17/04/2024

2:58:07 PM

2,016.00

61

XCSE

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

6

XCSE

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

19

XCSE

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

8

AQEU

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

56

CEUX

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

56

CEUX

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

56

CEUX

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

1

CEUX

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

3

AQEU

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

48

CEUX

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

33

XCSE

GENMAB A/S

17/04/2024

2:58:08 PM

2,016.00

28

XCSE

69


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

2:58:10 PM

2,015.00

20

XCSE

GENMAB A/S

17/04/2024

3:01:49 PM

2,014.00

23

XCSE

GENMAB A/S

17/04/2024

3:01:49 PM

2,014.00

22

XCSE

GENMAB A/S

17/04/2024

3:01:50 PM

2,014.00

18

XCSE

GENMAB A/S

17/04/2024

3:01:50 PM

2,014.00

5

XCSE

GENMAB A/S

17/04/2024

3:01:50 PM

2,014.00

23

XCSE

GENMAB A/S

17/04/2024

3:01:50 PM

2,014.00

3

XCSE

GENMAB A/S

17/04/2024

3:01:50 PM

2,014.00

10

XCSE

GENMAB A/S

17/04/2024

3:04:09 PM

2,015.00

14

AQEU

GENMAB A/S

17/04/2024

3:04:09 PM

2,015.00

75

CEUX

GENMAB A/S

17/04/2024

3:04:09 PM

2,015.00

24

CEUX

GENMAB A/S

17/04/2024

3:04:09 PM

2,015.00

7

AQEU

GENMAB A/S

17/04/2024

3:04:09 PM

2,015.00

49

CEUX

GENMAB A/S

17/04/2024

3:07:19 PM

2,015.00

10

AQEU

GENMAB A/S

17/04/2024

3:07:19 PM

2,015.00

70

CEUX

GENMAB A/S

17/04/2024

3:07:19 PM

2,015.00

11

TQEX

GENMAB A/S

17/04/2024

3:07:19 PM

2,015.00

43

XCSE

GENMAB A/S

17/04/2024

3:07:19 PM

2,015.00

35

XCSE

GENMAB A/S

17/04/2024

3:07:19 PM

2,014.00

26

XCSE

GENMAB A/S

17/04/2024

3:07:19 PM

2,014.00

22

XCSE

GENMAB A/S

17/04/2024

3:07:19 PM

2,014.00

26

XCSE

GENMAB A/S

17/04/2024

3:07:19 PM

2,014.00

3

CEUX

GENMAB A/S

17/04/2024

3:08:00 PM

2,015.00

40

CEUX

GENMAB A/S

17/04/2024

3:12:58 PM

2,011.00

8

CEUX

GENMAB A/S

17/04/2024

3:12:58 PM

2,011.00

5

TQEX

GENMAB A/S

17/04/2024

3:12:58 PM

2,011.00

8

XCSE

GENMAB A/S

17/04/2024

3:13:32 PM

2,011.00

5

XCSE

GENMAB A/S

17/04/2024

3:17:16 PM

2,015.00

36

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

7

XCSE

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

49

XCSE

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

7

XCSE

GENMAB A/S

17/04/2024

3:17:55 PM

2,015.00

40

XCSE

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

1

AQEU

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

1

AQEU

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

1

AQEU

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

4

CEUX

70


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

4

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

8

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

3

CEUX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

5

TQEX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

22

TQEX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

4

TQEX

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

1

AQEU

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

7

XCSE

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

55

XCSE

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

21

XCSE

GENMAB A/S

17/04/2024

3:17:55 PM

2,014.00

14

XCSE

GENMAB A/S

17/04/2024

3:19:09 PM

2,015.00

19

XCSE

GENMAB A/S

17/04/2024

3:20:27 PM

2,016.00

39

CEUX

GENMAB A/S

17/04/2024

3:20:27 PM

2,016.00

39

CEUX

GENMAB A/S

17/04/2024

3:20:27 PM

2,016.00

39

CEUX

GENMAB A/S

17/04/2024

3:20:27 PM

2,016.00

19

XCSE

GENMAB A/S

17/04/2024

3:20:27 PM

2,016.00

23

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

25

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

34

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

16

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

15

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

27

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

71


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

22

XCSE

GENMAB A/S

17/04/2024

3:24:45 PM

2,019.00

30

XCSE

GENMAB A/S

17/04/2024

3:25:04 PM

2,017.00

36

CEUX

GENMAB A/S

17/04/2024

3:25:04 PM

2,017.00

16

XCSE

GENMAB A/S

17/04/2024

3:29:34 PM

2,018.00

35

XCSE

GENMAB A/S

17/04/2024

3:29:34 PM

2,018.00

32

CEUX

GENMAB A/S

17/04/2024

3:29:34 PM

2,018.00

5

TQEX

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

3

AQEU

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

3

AQEU

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

22

CEUX

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

22

CEUX

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

22

CEUX

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

22

CEUX

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

22

CEUX

GENMAB A/S

17/04/2024

3:30:01 PM

2,018.00

5

TQEX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

22

CEUX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

8

CEUX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

8

CEUX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

6

CEUX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

3

CEUX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

5

TQEX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

5

TQEX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

23

XCSE

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

23

XCSE

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

14

XCSE

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

9

XCSE

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

22

CEUX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

5

TQEX

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

23

XCSE

GENMAB A/S

17/04/2024

3:30:03 PM

2,018.00

5

TQEX

GENMAB A/S

17/04/2024

3:30:04 PM

2,018.00

3

AQEU

GENMAB A/S

17/04/2024

3:30:04 PM

2,018.00

20

XCSE

GENMAB A/S

17/04/2024

3:30:04 PM

2,018.00

3

AQEU

GENMAB A/S

17/04/2024

3:30:04 PM

2,018.00

16

AQEU

GENMAB A/S

17/04/2024

3:30:04 PM

2,018.00

19

CEUX

GENMAB A/S

17/04/2024

3:30:04 PM

2,018.00

5

TQEX

GENMAB A/S

17/04/2024

3:30:04 PM

2,018.00

43

XCSE

GENMAB A/S

17/04/2024

3:31:37 PM

2,017.00

18

XCSE

72


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

3:31:37 PM

2,017.00

2

XCSE

GENMAB A/S

17/04/2024

3:31:37 PM

2,017.00

19

CEUX

GENMAB A/S

17/04/2024

3:31:37 PM

2,017.00

5

TQEX

GENMAB A/S

17/04/2024

3:31:39 PM

2,017.00

20

XCSE

GENMAB A/S

17/04/2024

3:31:39 PM

2,017.00

54

XCSE

GENMAB A/S

17/04/2024

3:31:39 PM

2,017.00

14

AQEU

GENMAB A/S

17/04/2024

3:31:39 PM

2,017.00

21

XCSE

GENMAB A/S

17/04/2024

3:32:25 PM

2,014.00

12

XCSE

GENMAB A/S

17/04/2024

3:32:25 PM

2,014.00

31

XCSE

GENMAB A/S

17/04/2024

3:32:25 PM

2,014.00

15

XCSE

GENMAB A/S

17/04/2024

3:32:25 PM

2,014.00

46

XCSE

GENMAB A/S

17/04/2024

3:32:25 PM

2,014.00

2

XCSE

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

2

AQEU

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

2

AQEU

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

2

AQEU

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

19

AQEU

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

21

CEUX

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

5

TQEX

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

21

XCSE

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

21

CEUX

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

12

CEUX

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

5

TQEX

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

14

CEUX

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

3

TQEX

GENMAB A/S

17/04/2024

3:32:25 PM

2,013.00

15

XCSE

GENMAB A/S

17/04/2024

3:32:26 PM

2,013.00

33

XCSE

GENMAB A/S

17/04/2024

3:32:26 PM

2,013.00

16

XCSE

GENMAB A/S

17/04/2024

3:32:26 PM

2,013.00

16

XCSE

GENMAB A/S

17/04/2024

3:32:26 PM

2,013.00

16

XCSE

GENMAB A/S

17/04/2024

3:40:34 PM

2,015.00

52

XCSE

GENMAB A/S

17/04/2024

3:40:34 PM

2,015.00

37

XCSE

GENMAB A/S

17/04/2024

3:40:34 PM

2,015.00

81

CEUX

GENMAB A/S

17/04/2024

3:40:34 PM

2,015.00

12

TQEX

GENMAB A/S

17/04/2024

3:40:34 PM

2,015.00

12

TQEX

GENMAB A/S

17/04/2024

3:42:01 PM

2,016.00

29

XCSE

GENMAB A/S

17/04/2024

3:42:02 PM

2,016.00

8

XCSE

GENMAB A/S

17/04/2024

3:42:02 PM

2,016.00

4

XCSE

GENMAB A/S

17/04/2024

3:42:02 PM

2,016.00

25

CEUX

GENMAB A/S

17/04/2024

3:44:11 PM

2,017.00

17

CEUX

73


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

3:44:11 PM

2,017.00

17

CEUX

GENMAB A/S

17/04/2024

3:44:11 PM

2,017.00

7

CEUX

GENMAB A/S

17/04/2024

3:44:37 PM

2,017.00

1

CEUX

GENMAB A/S

17/04/2024

3:44:37 PM

2,017.00

14

CEUX

GENMAB A/S

17/04/2024

3:44:37 PM

2,017.00

22

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

23

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

10

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

27

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

7

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

10

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

3

AQEU

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

1

AQEU

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

3

AQEU

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

1

AQEU

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

21

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

10

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

21

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

10

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

4

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

10

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

10

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

5

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

5

TQEX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

5

TQEX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

5

TQEX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

5

TQEX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

7

AQEU

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

36

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

8

TQEX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

10

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

11

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

13

CEUX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

30

XCSE

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

1

TQEX

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

26

AQEU

GENMAB A/S

17/04/2024

3:44:42 PM

2,016.00

11

AQEU

GENMAB A/S

17/04/2024

3:46:48 PM

2,016.00

36

XCSE

GENMAB A/S

17/04/2024

3:46:48 PM

2,016.00

48

CEUX

GENMAB A/S

17/04/2024

3:46:48 PM

2,016.00

30

CEUX

74


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

3:46:48 PM

2,016.00

12

TQEX

GENMAB A/S

17/04/2024

3:46:48 PM

2,016.00

50

XCSE

GENMAB A/S

17/04/2024

3:46:48 PM

2,016.00

11

CEUX

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

39

XCSE

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

29

XCSE

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

46

XCSE

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

3

XCSE

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

9

AQEU

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

62

CEUX

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

9

TQEX

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

43

XCSE

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

6

XCSE

GENMAB A/S

17/04/2024

3:48:45 PM

2,019.00

49

XCSE

GENMAB A/S

17/04/2024

3:49:54 PM

2,017.00

11

XCSE

GENMAB A/S

17/04/2024

3:49:54 PM

2,017.00

11

XCSE

GENMAB A/S

17/04/2024

3:50:13 PM

2,019.00

21

XCSE

GENMAB A/S

17/04/2024

3:50:13 PM

2,019.00

1

XCSE

GENMAB A/S

17/04/2024

3:50:37 PM

2,020.00

50

XCSE

GENMAB A/S

17/04/2024

3:50:37 PM

2,020.00

45

CEUX

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

22

XCSE

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

66

XCSE

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

9

AQEU

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

59

CEUX

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

9

TQEX

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

22

XCSE

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

4

XCSE

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

22

XCSE

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

53

XCSE

GENMAB A/S

17/04/2024

3:52:38 PM

2,021.00

18

XCSE

GENMAB A/S

17/04/2024

3:54:24 PM

2,018.00

55

XCSE

GENMAB A/S

17/04/2024

3:54:24 PM

2,018.00

7

AQEU

GENMAB A/S

17/04/2024

3:54:24 PM

2,018.00

50

CEUX

GENMAB A/S

17/04/2024

3:54:24 PM

2,018.00

8

TQEX

GENMAB A/S

17/04/2024

3:55:04 PM

2,017.00

25

XCSE

GENMAB A/S

17/04/2024

3:55:04 PM

2,017.00

18

XCSE

GENMAB A/S

17/04/2024

3:55:04 PM

2,017.00

7

XCSE

GENMAB A/S

17/04/2024

3:55:04 PM

2,017.00

25

XCSE

GENMAB A/S

17/04/2024

3:55:04 PM

2,017.00

8

XCSE

GENMAB A/S

17/04/2024

3:55:04 PM

2,017.00

25

XCSE

75


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

3:55:05 PM

2,017.00

25

XCSE

GENMAB A/S

17/04/2024

3:56:46 PM

2,015.00

9

AQEU

GENMAB A/S

17/04/2024

3:56:46 PM

2,015.00

28

CEUX

GENMAB A/S

17/04/2024

3:56:46 PM

2,015.00

30

CEUX

GENMAB A/S

17/04/2024

3:56:46 PM

2,015.00

9

TQEX

GENMAB A/S

17/04/2024

3:56:46 PM

2,015.00

65

XCSE

GENMAB A/S

17/04/2024

3:57:49 PM

2,014.00

28

XCSE

GENMAB A/S

17/04/2024

3:57:49 PM

2,014.00

28

XCSE

GENMAB A/S

17/04/2024

3:57:49 PM

2,014.00

4

XCSE

GENMAB A/S

17/04/2024

3:57:49 PM

2,014.00

20

XCSE

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

8

XCSE

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

13

XCSE

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

8

XCSE

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

22

XCSE

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

8

CEUX

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

8

CEUX

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

8

CEUX

GENMAB A/S

17/04/2024

3:58:32 PM

2,018.00

8

CEUX

GENMAB A/S

17/04/2024

3:59:24 PM

2,017.00

11

AQEU

GENMAB A/S

17/04/2024

3:59:24 PM

2,017.00

34

CEUX

GENMAB A/S

17/04/2024

3:59:24 PM

2,017.00

44

CEUX

GENMAB A/S

17/04/2024

3:59:24 PM

2,017.00

11

TQEX

GENMAB A/S

17/04/2024

3:59:24 PM

2,017.00

1

TQEX

GENMAB A/S

17/04/2024

3:59:24 PM

2,017.00

30

XCSE

GENMAB A/S

17/04/2024

3:59:24 PM

2,017.00

56

XCSE

GENMAB A/S

17/04/2024

3:59:25 PM

2,016.00

46

XCSE

GENMAB A/S

17/04/2024

4:01:58 PM

2,014.00

8

AQEU

GENMAB A/S

17/04/2024

4:01:58 PM

2,014.00

7

CEUX

GENMAB A/S

17/04/2024

4:01:58 PM

2,014.00

15

CEUX

GENMAB A/S

17/04/2024

4:01:58 PM

2,014.00

29

CEUX

GENMAB A/S

17/04/2024

4:01:58 PM

2,014.00

7

TQEX

GENMAB A/S

17/04/2024

4:01:58 PM

2,014.00

57

XCSE

GENMAB A/S

17/04/2024

4:03:05 PM

2,014.00

9

XCSE

GENMAB A/S

17/04/2024

4:03:05 PM

2,014.00

13

XCSE

GENMAB A/S

17/04/2024

4:03:05 PM

2,014.00

38

XCSE

GENMAB A/S

17/04/2024

4:03:05 PM

2,014.00

8

AQEU

GENMAB A/S

17/04/2024

4:03:05 PM

2,014.00

11

CEUX

GENMAB A/S

17/04/2024

4:03:05 PM

2,014.00

43

CEUX

GENMAB A/S

17/04/2024

4:03:05 PM

2,014.00

8

TQEX

76


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

4:04:29 PM

2,012.00

58

XCSE

GENMAB A/S

17/04/2024

4:04:29 PM

2,012.00

8

AQEU

GENMAB A/S

17/04/2024

4:04:29 PM

2,012.00

53

CEUX

GENMAB A/S

17/04/2024

4:04:29 PM

2,012.00

8

TQEX

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

57

XCSE

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

4

AQEU

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

27

CEUX

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

7

CEUX

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

11

CEUX

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

7

CEUX

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

4

AQEU

GENMAB A/S

17/04/2024

4:05:32 PM

2,010.00

8

TQEX

GENMAB A/S

17/04/2024

4:06:08 PM

2,006.00

43

XCSE

GENMAB A/S

17/04/2024

4:06:08 PM

2,006.00

85

XCSE

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

3

AQEU

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

19

CEUX

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

19

CEUX

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

2

CEUX

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

5

TQEX

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

8

TQEX

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

18

XCSE

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

49

XCSE

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

23

XCSE

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

80

XCSE

GENMAB A/S

17/04/2024

4:06:08 PM

2,006.00

8

AQEU

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

8

AQEU

GENMAB A/S

17/04/2024

4:06:08 PM

2,007.00

12

AQEU

GENMAB A/S

17/04/2024

4:11:37 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:11:37 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

1

AQEU

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

14

AQEU

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

1

AQEU

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

14

AQEU

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

3

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

6

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

5

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

9

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

2

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

9

CEUX

77


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

2

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

6

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

3

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

9

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

5

TQEX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

5

TQEX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

5

TQEX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

1

AQEU

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

AQEU

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

9

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

9

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

4

CEUX

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

XCSE

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

8

AQEU

GENMAB A/S

17/04/2024

4:12:05 PM

2,009.00

36

CEUX

GENMAB A/S

17/04/2024

4:13:34 PM

2,006.00

49

XCSE

GENMAB A/S

17/04/2024

4:13:34 PM

2,006.00

16

XCSE

GENMAB A/S

17/04/2024

4:13:34 PM

2,006.00

9

AQEU

GENMAB A/S

17/04/2024

4:13:34 PM

2,006.00

59

CEUX

GENMAB A/S

17/04/2024

4:13:34 PM

2,006.00

9

TQEX

GENMAB A/S

17/04/2024

4:14:48 PM

2,008.00

9

AQEU

GENMAB A/S

17/04/2024

4:14:48 PM

2,008.00

10

CEUX

GENMAB A/S

17/04/2024

4:14:48 PM

2,008.00

51

CEUX

GENMAB A/S

17/04/2024

4:14:48 PM

2,008.00

10

TQEX

GENMAB A/S

17/04/2024

4:14:48 PM

2,008.00

48

XCSE

GENMAB A/S

17/04/2024

4:14:48 PM

2,008.00

27

XCSE

GENMAB A/S

17/04/2024

4:14:48 PM

2,008.00

42

XCSE

GENMAB A/S

17/04/2024

4:18:31 PM

2,009.00

36

XCSE

GENMAB A/S

17/04/2024

4:18:31 PM

2,009.00

154

XCSE

GENMAB A/S

17/04/2024

4:18:31 PM

2,009.00

98

CEUX

GENMAB A/S

17/04/2024

4:18:31 PM

2,009.00

20

AQEU

GENMAB A/S

17/04/2024

4:18:31 PM

2,009.00

13

CEUX

78


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

4:18:31 PM

2,009.00

26

CEUX

GENMAB A/S

17/04/2024

4:20:40 PM

2,009.00

34

XCSE

GENMAB A/S

17/04/2024

4:20:40 PM

2,009.00

31

CEUX

GENMAB A/S

17/04/2024

4:20:40 PM

2,009.00

21

CEUX

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

12

AQEU

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

4

CEUX

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

6

CEUX

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

69

CEUX

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

8

TQEX

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

4

TQEX

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

57

XCSE

GENMAB A/S

17/04/2024

4:21:35 PM

2,009.00

32

XCSE

GENMAB A/S

17/04/2024

4:24:15 PM

2,009.00

2

CEUX

GENMAB A/S

17/04/2024

4:24:15 PM

2,009.00

13

CEUX

GENMAB A/S

17/04/2024

4:25:02 PM

2,008.00

23

AQEU

GENMAB A/S

17/04/2024

4:25:02 PM

2,008.00

160

CEUX

GENMAB A/S

17/04/2024

4:25:02 PM

2,008.00

24

TQEX

GENMAB A/S

17/04/2024

4:25:02 PM

2,008.00

178

XCSE

GENMAB A/S

17/04/2024

4:27:53 PM

2,011.00

12

AQEU

GENMAB A/S

17/04/2024

4:27:53 PM

2,011.00

37

CEUX

GENMAB A/S

17/04/2024

4:27:53 PM

2,011.00

17

CEUX

GENMAB A/S

17/04/2024

4:27:53 PM

2,011.00

29

CEUX

GENMAB A/S

17/04/2024

4:27:53 PM

2,011.00

13

TQEX

GENMAB A/S

17/04/2024

4:27:53 PM

2,011.00

21

XCSE

GENMAB A/S

17/04/2024

4:27:53 PM

2,011.00

71

XCSE

GENMAB A/S

17/04/2024

4:27:53 PM

2,010.00

66

CEUX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

10

CEUX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

8

CEUX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

10

CEUX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

8

CEUX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

7

CEUX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

5

TQEX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

5

TQEX

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

9

XCSE

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

8

XCSE

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

34

XCSE

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

9

XCSE

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

8

XCSE

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

9

XCSE

79


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

4:30:10 PM

2,011.00

8

XCSE

GENMAB A/S

17/04/2024

4:30:12 PM

2,011.00

5

TQEX

GENMAB A/S

17/04/2024

4:30:12 PM

2,011.00

5

TQEX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

13

AQEU

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

14

AQEU

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

34

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

13

AQEU

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

3

AQEU

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

54

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

86

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

2

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

88

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

1

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

88

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

4

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

2

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

51

CEUX

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

36

XCSE

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

63

XCSE

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

149

XCSE

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

63

XCSE

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

36

XCSE

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

111

XCSE

GENMAB A/S

17/04/2024

4:31:59 PM

2,012.00

14

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

111

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

16

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

2

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

2

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

32

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

2

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

1

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

10

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

2

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

80


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

11

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

9

TQEX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

8

TQEX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

8

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

27

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

27

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

96

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

12

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

27

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

12

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

27

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

17

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

19

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

12

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

160

XCSE

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

8

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

8

AQEU

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

36

CEUX

GENMAB A/S

17/04/2024

4:39:03 PM

2,009.00

2

CEUX

GENMAB A/S

17/04/2024

4:45:11 PM

2,010.00

40

CEUX

GENMAB A/S

17/04/2024

4:45:24 PM

2,010.00

40

XCSE

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

99

XCSE

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

31

XCSE

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

221

XCSE

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

XCSE

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

55

XCSE

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

18

AQEU

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

26

AQEU

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

6

AQEU

81


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

1

AQEU

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

1

AQEU

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

37

AQEU

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

75

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

51

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

75

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

99

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

10

CEUX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

19

TQEX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

5

TQEX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

5

TQEX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

28

TQEX

GENMAB A/S

17/04/2024

4:46:34 PM

2,010.00

3

TQEX

GENMAB A/S

17/04/2024

4:46:34 PM

2,009.00

24

XCSE

GENMAB A/S

17/04/2024

4:46:35 PM

2,009.00

16

CEUX

GENMAB A/S

17/04/2024

4:46:35 PM

2,009.00

20

XCSE

GENMAB A/S

17/04/2024

4:46:35 PM

2,009.00

3

CEUX

GENMAB A/S

17/04/2024

4:46:35 PM

2,009.00

2

AQEU

GENMAB A/S

17/04/2024

4:46:35 PM

2,009.00

8

CEUX

GENMAB A/S

17/04/2024

4:46:35 PM

2,009.00

20

XCSE

GENMAB A/S

17/04/2024

4:46:35 PM

2,009.00

7

XCSE

GENMAB A/S

17/04/2024

4:50:00 PM

2,015.00

19

XCSE

GENMAB A/S

17/04/2024

4:50:00 PM

2,015.00

38

XCSE

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

9

CEUX

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

8

CEUX

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

5

TQEX

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

16

XCSE

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

34

XCSE

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

16

XCSE

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

16

XCSE

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

16

XCSE

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

2

AQEU

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

10

CEUX

82


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

5

TQEX

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

1

TQEX

GENMAB A/S

17/04/2024

4:50:24 PM

2,015.00

7

CEUX

GENMAB A/S

17/04/2024

4:51:01 PM

2,017.00

172

XCSE

GENMAB A/S

17/04/2024

4:51:01 PM

2,017.00

22

AQEU

GENMAB A/S

17/04/2024

4:51:01 PM

2,017.00

153

CEUX

GENMAB A/S

17/04/2024

4:51:01 PM

2,017.00

24

TQEX

GENMAB A/S

17/04/2024

4:51:28 PM

2,015.00

42

XCSE

GENMAB A/S

17/04/2024

4:53:10 PM

2,014.00

20

TQEX

GENMAB A/S

17/04/2024

4:53:10 PM

2,014.00

53

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

22

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

21

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

22

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

21

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

14

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

17

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

5

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

5

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

7

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

7

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

18

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

2

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

2

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

22

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

21

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

22

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

21

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

34

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

23

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

5

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

16

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

21

TQEX

83


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

5

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

5

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

5

CEUX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

10

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

14

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

20

TQEX

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

30

XCSE

GENMAB A/S

18/04/2024

9:00:32 AM

2,000.00

35

XCSE

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

3

AQEU

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

37

AQEU

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

20

CEUX

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

20

CEUX

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

20

CEUX

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

20

CEUX

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

13

CEUX

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

5

TQEX

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

37

TQEX

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

22

XCSE

GENMAB A/S

18/04/2024

9:01:39 AM

1,993.00

79

XCSE

GENMAB A/S

18/04/2024

9:05:03 AM

1,981.00

1

XCSE

GENMAB A/S

18/04/2024

9:05:03 AM

1,981.00

20

XCSE

GENMAB A/S

18/04/2024

9:05:03 AM

1,981.00

8

XCSE

GENMAB A/S

18/04/2024

9:05:03 AM

1,981.00

8

XCSE

GENMAB A/S

18/04/2024

9:06:31 AM

1,986.50

12

XCSE

GENMAB A/S

18/04/2024

9:07:12 AM

1,988.00

4

CEUX

GENMAB A/S

18/04/2024

9:07:13 AM

1,988.00

14

XCSE

GENMAB A/S

18/04/2024

9:07:13 AM

1,988.00

14

XCSE

GENMAB A/S

18/04/2024

9:07:13 AM

1,988.00

9

CEUX

GENMAB A/S

18/04/2024

9:07:13 AM

1,988.00

13

CEUX

GENMAB A/S

18/04/2024

9:07:35 AM

1,989.00

21

XCSE

GENMAB A/S

18/04/2024

9:08:13 AM

1,988.00

31

XCSE

GENMAB A/S

18/04/2024

9:08:14 AM

1,988.00

28

CEUX

GENMAB A/S

18/04/2024

9:08:14 AM

1,988.00

31

XCSE

GENMAB A/S

18/04/2024

9:08:14 AM

1,988.00

31

XCSE

GENMAB A/S

18/04/2024

9:08:14 AM

1,988.00

28

CEUX

GENMAB A/S

18/04/2024

9:08:14 AM

1,988.00

4

AQEU

GENMAB A/S

18/04/2024

9:08:18 AM

1,988.00

31

XCSE

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

31

XCSE

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

27

XCSE

84


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

4

XCSE

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

14

XCSE

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

5

XCSE

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

4

AQEU

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

28

CEUX

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

28

CEUX

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

28

CEUX

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

4

AQEU

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

4

AQEU

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

28

CEUX

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

15

CEUX

GENMAB A/S

18/04/2024

9:08:45 AM

1,988.00

24

CEUX

GENMAB A/S

18/04/2024

9:09:15 AM

1,980.00

21

XCSE

GENMAB A/S

18/04/2024

9:09:15 AM

1,980.00

88

XCSE

GENMAB A/S

18/04/2024

9:09:15 AM

1,980.00

21

XCSE

GENMAB A/S

18/04/2024

9:09:15 AM

1,980.00

21

XCSE

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

6

TQEX

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

6

TQEX

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

6

XCSE

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

32

XCSE

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

38

XCSE

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

30

XCSE

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

6

TQEX

GENMAB A/S

18/04/2024

9:10:18 AM

1,978.50

6

TQEX

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

21

CEUX

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

13

CEUX

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

21

CEUX

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

22

XCSE

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

18

XCSE

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

13

XCSE

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

22

XCSE

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

13

XCSE

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

13

CEUX

GENMAB A/S

18/04/2024

9:12:02 AM

1,982.00

17

CEUX

GENMAB A/S

18/04/2024

9:12:27 AM

1,983.00

37

CEUX

GENMAB A/S

18/04/2024

9:12:55 AM

1,985.00

12

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

XCSE

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

56

XCSE

85


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

XCSE

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

XCSE

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

XCSE

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

XCSE

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

5

XCSE

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

8

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

8

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

8

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

13

CEUX

GENMAB A/S

18/04/2024

9:13:58 AM

1,987.50

12

CEUX

GENMAB A/S

18/04/2024

9:14:32 AM

1,987.00

27

XCSE

GENMAB A/S

18/04/2024

9:14:32 AM

1,987.00

5

XCSE

GENMAB A/S

18/04/2024

9:14:37 AM

1,986.50

75

XCSE

GENMAB A/S

18/04/2024

9:16:08 AM

1,989.50

16

TQEX

GENMAB A/S

18/04/2024

9:16:08 AM

1,989.50

17

XCSE

GENMAB A/S

18/04/2024

9:16:08 AM

1,989.50

92

XCSE

GENMAB A/S

18/04/2024

9:16:46 AM

1,989.50

10

XCSE

GENMAB A/S

18/04/2024

9:16:46 AM

1,989.50

14

XCSE

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

27

XCSE

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

25

CEUX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

4

AQEU

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

25

CEUX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

25

CEUX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

27

XCSE

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

27

XCSE

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

26

TQEX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

30

TQEX

GENMAB A/S

18/04/2024

9:18:07 AM

1,991.50

7

TQEX

GENMAB A/S

18/04/2024

9:19:59 AM

1,993.00

64

CEUX

GENMAB A/S

18/04/2024

9:19:59 AM

1,993.00

27

CEUX

GENMAB A/S

18/04/2024

9:20:12 AM

1,993.00

17

CEUX

GENMAB A/S

18/04/2024

9:20:12 AM

1,993.00

17

CEUX

86


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:20:12 AM

1,993.00

5

TQEX

GENMAB A/S

18/04/2024

9:20:12 AM

1,993.00

5

TQEX

GENMAB A/S

18/04/2024

9:20:12 AM

1,993.00

1

TQEX

GENMAB A/S

18/04/2024

9:20:12 AM

1,993.00

3

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

3

TQEX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

3

AQEU

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

18

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

18

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

2

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

18

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

2

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

14

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

24

CEUX

GENMAB A/S

18/04/2024

9:20:14 AM

1,992.50

18

CEUX

GENMAB A/S

18/04/2024

9:22:56 AM

1,990.50

48

CEUX

GENMAB A/S

18/04/2024

9:22:56 AM

1,990.50

8

CEUX

GENMAB A/S

18/04/2024

9:23:48 AM

1,992.50

38

AQEU

GENMAB A/S

18/04/2024

9:23:50 AM

1,992.50

1

AQEU

GENMAB A/S

18/04/2024

9:23:50 AM

1,992.50

4

AQEU

GENMAB A/S

18/04/2024

9:23:50 AM

1,992.50

3

AQEU

GENMAB A/S

18/04/2024

9:23:53 AM

1,992.50

15

AQEU

GENMAB A/S

18/04/2024

9:23:53 AM

1,992.50

4

AQEU

GENMAB A/S

18/04/2024

9:24:09 AM

1,990.50

24

XCSE

GENMAB A/S

18/04/2024

9:24:09 AM

1,990.50

5

TQEX

GENMAB A/S

18/04/2024

9:24:09 AM

1,990.50

3

AQEU

GENMAB A/S

18/04/2024

9:24:09 AM

1,990.50

24

CEUX

GENMAB A/S

18/04/2024

9:24:09 AM

1,990.50

24

XCSE

GENMAB A/S

18/04/2024

9:24:09 AM

1,990.50

24

CEUX

GENMAB A/S

18/04/2024

9:25:20 AM

1,991.00

24

XCSE

GENMAB A/S

18/04/2024

9:25:23 AM

1,991.00

22

CEUX

GENMAB A/S

18/04/2024

9:25:23 AM

1,991.00

24

XCSE

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

22

CEUX

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

24

XCSE

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

24

XCSE

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

22

CEUX

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

22

CEUX

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

3

CEUX

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

24

XCSE

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

24

XCSE

87


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:25:27 AM

1,991.00

16

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

25

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

50

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

2

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

2

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

23

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

2

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

2

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

23

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

4

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

24

XCSE

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

46

CEUX

GENMAB A/S

18/04/2024

9:27:16 AM

1,992.00

8

TQEX

GENMAB A/S

18/04/2024

9:28:57 AM

1,992.00

47

XCSE

GENMAB A/S

18/04/2024

9:28:57 AM

1,992.00

8

CEUX

GENMAB A/S

18/04/2024

9:28:57 AM

1,992.00

7

TQEX

GENMAB A/S

18/04/2024

9:28:57 AM

1,992.00

18

CEUX

GENMAB A/S

18/04/2024

9:28:57 AM

1,992.00

17

CEUX

GENMAB A/S

18/04/2024

9:28:57 AM

1,992.00

6

XCSE

GENMAB A/S

18/04/2024

9:29:03 AM

1,992.00

52

XCSE

GENMAB A/S

18/04/2024

9:29:30 AM

1,992.00

54

CEUX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

10

CEUX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

7

CEUX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

3

CEUX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

4

CEUX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

10

XCSE

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

10

XCSE

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

10

XCSE

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

34

XCSE

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

1

AQEU

GENMAB A/S

18/04/2024

9:32:41 AM

1,989.50

10

CEUX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

28

XCSE

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

28

XCSE

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

28

XCSE

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

25

XCSE

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

27

CEUX

88


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

11

CEUX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

16

CEUX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

27

CEUX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

10

CEUX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

4

CEUX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

5

CEUX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

64

XCSE

GENMAB A/S

18/04/2024

9:34:18 AM

1,989.50

3

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,994.50

35

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

16

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

3

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

16

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

2

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

38

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

20

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

13

CEUX

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

12

XCSE

GENMAB A/S

18/04/2024

9:37:33 AM

1,993.50

25

XCSE

GENMAB A/S

18/04/2024

9:38:55 AM

1,993.50

26

XCSE

GENMAB A/S

18/04/2024

9:38:56 AM

1,993.50

26

XCSE

GENMAB A/S

18/04/2024

9:39:01 AM

1,993.50

26

XCSE

GENMAB A/S

18/04/2024

9:39:01 AM

1,993.50

26

XCSE

GENMAB A/S

18/04/2024

9:39:01 AM

1,993.50

5

XCSE

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

XCSE

89


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

36

CEUX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

CEUX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

CEUX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

CEUX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

CEUX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

CEUX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

5

TQEX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

5

TQEX

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

XCSE

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

8

XCSE

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

16

XCSE

GENMAB A/S

18/04/2024

9:40:05 AM

1,993.00

34

CEUX

GENMAB A/S

18/04/2024

9:42:20 AM

1,992.50

38

XCSE

GENMAB A/S

18/04/2024

9:42:22 AM

1,992.50

38

XCSE

GENMAB A/S

18/04/2024

9:42:22 AM

1,992.50

25

XCSE

GENMAB A/S

18/04/2024

9:42:22 AM

1,992.50

13

XCSE

GENMAB A/S

18/04/2024

9:42:22 AM

1,992.50

2

XCSE

GENMAB A/S

18/04/2024

9:42:25 AM

1,992.00

17

AQEU

GENMAB A/S

18/04/2024

9:42:25 AM

1,992.00

36

CEUX

GENMAB A/S

18/04/2024

9:45:32 AM

1,995.50

16

CEUX

GENMAB A/S

18/04/2024

9:45:32 AM

1,995.50

2

CEUX

GENMAB A/S

18/04/2024

9:45:32 AM

1,995.50

6

CEUX

GENMAB A/S

18/04/2024

9:45:32 AM

1,995.50

7

CEUX

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.00

34

XCSE

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.50

25

XCSE

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.50

34

XCSE

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.50

16

XCSE

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.50

23

XCSE

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.50

38

XCSE

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.50

34

XCSE

GENMAB A/S

18/04/2024

9:45:35 AM

1,996.50

22

XCSE

GENMAB A/S

18/04/2024

9:45:58 AM

1,995.50

50

XCSE

GENMAB A/S

18/04/2024

9:45:58 AM

1,995.50

50

XCSE

GENMAB A/S

18/04/2024

9:45:58 AM

1,995.50

9

XCSE

GENMAB A/S

18/04/2024

9:45:59 AM

1,995.00

25

XCSE

GENMAB A/S

18/04/2024

9:45:59 AM

1,995.00

25

XCSE

GENMAB A/S

18/04/2024

9:45:59 AM

1,994.50

13

CEUX

GENMAB A/S

18/04/2024

9:46:00 AM

1,994.50

18

XCSE

GENMAB A/S

18/04/2024

9:48:31 AM

1,996.50

17

CEUX

90


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

9:48:31 AM

1,996.50

17

CEUX

GENMAB A/S

18/04/2024

9:48:31 AM

1,996.50

3

TQEX

GENMAB A/S

18/04/2024

9:49:36 AM

2,000.00

74

XCSE

GENMAB A/S

18/04/2024

9:49:36 AM

2,000.00

25

XCSE

GENMAB A/S

18/04/2024

9:49:36 AM

2,000.00

25

XCSE

GENMAB A/S

18/04/2024

9:49:36 AM

2,000.00

58

XCSE

GENMAB A/S

18/04/2024

9:51:04 AM

1,999.50

8

AQEU

GENMAB A/S

18/04/2024

9:51:04 AM

1,999.50

52

CEUX

GENMAB A/S

18/04/2024

9:51:04 AM

1,999.50

4

TQEX

GENMAB A/S

18/04/2024

9:51:04 AM

1,999.50

4

TQEX

GENMAB A/S

18/04/2024

9:51:04 AM

1,999.50

57

XCSE

GENMAB A/S

18/04/2024

9:51:04 AM

1,998.50

30

XCSE

GENMAB A/S

18/04/2024

9:51:04 AM

1,998.50

15

XCSE

GENMAB A/S

18/04/2024

9:51:04 AM

1,998.50

15

XCSE

GENMAB A/S

18/04/2024

9:51:04 AM

1,998.50

30

XCSE

GENMAB A/S

18/04/2024

9:51:04 AM

1,998.00

17

CEUX

GENMAB A/S

18/04/2024

9:51:04 AM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

9:51:04 AM

1,998.50

36

CEUX

GENMAB A/S

18/04/2024

9:55:03 AM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

9:55:03 AM

1,997.00

2

XCSE

GENMAB A/S

18/04/2024

9:56:51 AM

2,000.00

66

XCSE

GENMAB A/S

18/04/2024

9:56:51 AM

2,000.00

43

XCSE

GENMAB A/S

18/04/2024

9:56:51 AM

2,000.00

14

AQEU

GENMAB A/S

18/04/2024

9:56:51 AM

2,000.00

98

CEUX

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

5

AQEU

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

50

CEUX

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

8

TQEX

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

56

XCSE

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

27

XCSE

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

27

XCSE

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

27

XCSE

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

11

XCSE

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

5

XCSE

GENMAB A/S

18/04/2024

9:59:30 AM

1,999.00

2

AQEU

GENMAB A/S

18/04/2024

10:00:30 AM

1,996.50

20

XCSE

GENMAB A/S

18/04/2024

10:00:30 AM

1,996.50

22

XCSE

GENMAB A/S

18/04/2024

10:00:30 AM

1,996.50

22

XCSE

GENMAB A/S

18/04/2024

10:00:30 AM

1,996.50

20

XCSE

GENMAB A/S

18/04/2024

10:00:30 AM

1,996.50

2

XCSE

91


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

10:00:30 AM

1,996.50

17

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

2

AQEU

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

9

CEUX

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

9

CEUX

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

10

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

10

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

10

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

26

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

20

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

6

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

6

XCSE

GENMAB A/S

18/04/2024

10:01:00 AM

1,998.00

7

XCSE

GENMAB A/S

18/04/2024

10:04:15 AM

1,996.00

25

XCSE

GENMAB A/S

18/04/2024

10:04:15 AM

1,996.00

25

XCSE

GENMAB A/S

18/04/2024

10:04:15 AM

1,996.00

22

XCSE

GENMAB A/S

18/04/2024

10:04:15 AM

1,996.00

3

XCSE

GENMAB A/S

18/04/2024

10:04:15 AM

1,996.00

22

XCSE

GENMAB A/S

18/04/2024

10:04:15 AM

1,996.00

25

XCSE

GENMAB A/S

18/04/2024

10:07:13 AM

1,998.50

9

CEUX

GENMAB A/S

18/04/2024

10:07:13 AM

1,998.50

5

TQEX

GENMAB A/S

18/04/2024

10:07:13 AM

1,998.50

9

XCSE

GENMAB A/S

18/04/2024

10:07:13 AM

1,998.50

1

XCSE

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

6

AQEU

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

39

CEUX

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

28

CEUX

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

6

TQEX

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

44

XCSE

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

37

XCSE

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

1

XCSE

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

5

XCSE

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

39

XCSE

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

7

XCSE

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

21

CEUX

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

6

TQEX

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

8

AQEU

GENMAB A/S

18/04/2024

10:08:09 AM

2,000.00

36

CEUX

GENMAB A/S

18/04/2024

10:10:38 AM

2,000.00

24

XCSE

92


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

10:10:38 AM

2,000.00

19

XCSE

GENMAB A/S

18/04/2024

10:10:43 AM

2,000.00

25

XCSE

GENMAB A/S

18/04/2024

10:10:43 AM

2,000.00

25

XCSE

GENMAB A/S

18/04/2024

10:10:43 AM

2,000.00

25

XCSE

GENMAB A/S

18/04/2024

10:10:43 AM

2,000.00

5

XCSE

GENMAB A/S

18/04/2024

10:12:14 AM

1,998.00

66

CEUX

GENMAB A/S

18/04/2024

10:12:14 AM

1,998.00

2

CEUX

GENMAB A/S

18/04/2024

10:12:14 AM

1,998.00

10

TQEX

GENMAB A/S

18/04/2024

10:12:14 AM

1,998.00

10

AQEU

GENMAB A/S

18/04/2024

10:12:14 AM

1,998.00

76

XCSE

GENMAB A/S

18/04/2024

10:14:28 AM

1,996.50

15

XCSE

GENMAB A/S

18/04/2024

10:14:28 AM

1,996.50

7

XCSE

GENMAB A/S

18/04/2024

10:16:27 AM

1,997.50

39

CEUX

GENMAB A/S

18/04/2024

10:17:01 AM

1,997.50

41

CEUX

GENMAB A/S

18/04/2024

10:17:01 AM

1,997.00

9

CEUX

GENMAB A/S

18/04/2024

10:17:01 AM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

10:17:01 AM

1,997.00

8

XCSE

GENMAB A/S

18/04/2024

10:18:01 AM

1,996.50

118

XCSE

GENMAB A/S

18/04/2024

10:18:01 AM

1,996.50

15

AQEU

GENMAB A/S

18/04/2024

10:18:01 AM

1,996.50

75

CEUX

GENMAB A/S

18/04/2024

10:18:01 AM

1,996.50

31

CEUX

GENMAB A/S

18/04/2024

10:18:01 AM

1,996.50

17

TQEX

GENMAB A/S

18/04/2024

10:18:54 AM

1,995.00

57

XCSE

GENMAB A/S

18/04/2024

10:18:55 AM

1,995.00

23

CEUX

GENMAB A/S

18/04/2024

10:18:55 AM

1,995.00

28

CEUX

GENMAB A/S

18/04/2024

10:18:55 AM

1,995.00

7

TQEX

GENMAB A/S

18/04/2024

10:18:55 AM

1,995.00

8

CEUX

GENMAB A/S

18/04/2024

10:20:34 AM

1,993.50

8

CEUX

GENMAB A/S

18/04/2024

10:20:34 AM

1,993.50

4

TQEX

GENMAB A/S

18/04/2024

10:20:34 AM

1,993.50

8

XCSE

GENMAB A/S

18/04/2024

10:23:09 AM

1,994.50

8

CEUX

GENMAB A/S

18/04/2024

10:23:09 AM

1,994.50

6

CEUX

GENMAB A/S

18/04/2024

10:23:09 AM

1,994.50

5

TQEX

GENMAB A/S

18/04/2024

10:23:09 AM

1,994.50

8

XCSE

GENMAB A/S

18/04/2024

10:23:42 AM

1,995.00

37

CEUX

GENMAB A/S

18/04/2024

10:23:42 AM

1,995.00

2

CEUX

GENMAB A/S

18/04/2024

10:24:06 AM

1,994.50

5

XCSE

GENMAB A/S

18/04/2024

10:24:25 AM

1,995.00

37

CEUX

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

58

XCSE

93


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

58

XCSE

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

11

XCSE

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

56

XCSE

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

52

CEUX

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

22

CEUX

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

8

CEUX

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

22

CEUX

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

22

CEUX

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

17

CEUX

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

15

XCSE

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

30

XCSE

GENMAB A/S

18/04/2024

10:24:51 AM

1,995.00

17

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

XCSE

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

XCSE

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

39

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

8

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

12

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

5

TQEX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

2

TQEX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

5

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

16

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

3

TQEX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

3

TQEX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

5

TQEX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

XCSE

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

XCSE

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

XCSE

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

XCSE

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

7

CEUX

GENMAB A/S

18/04/2024

10:30:56 AM

1,998.50

17

XCSE

GENMAB A/S

18/04/2024

10:34:25 AM

1,999.00

23

XCSE

GENMAB A/S

18/04/2024

10:34:25 AM

1,999.00

35

XCSE

GENMAB A/S

18/04/2024

10:34:25 AM

1,999.00

4

XCSE

GENMAB A/S

18/04/2024

10:34:25 AM

1,999.00

19

XCSE

GENMAB A/S

18/04/2024

10:34:25 AM

1,999.00

23

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

23

XCSE

94


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

48

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

23

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

48

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

7

CEUX

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

8

CEUX

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

7

TQEX

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

6

TQEX

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

5

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

3

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

28

CEUX

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

14

TQEX

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

16

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

23

XCSE

GENMAB A/S

18/04/2024

10:34:28 AM

1,999.00

23

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

61

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

61

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

55

CEUX

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

54

CEUX

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

9

TQEX

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

9

TQEX

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.00

25

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.00

25

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.00

45

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.00

82

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.00

13

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.00

70

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.00

2

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

8

XCSE

GENMAB A/S

18/04/2024

10:39:08 AM

1,999.50

8

XCSE

GENMAB A/S

18/04/2024

10:48:47 AM

1,998.00

4

XCSE

GENMAB A/S

18/04/2024

10:49:13 AM

2,000.00

1

CEUX

GENMAB A/S

18/04/2024

10:49:13 AM

2,000.00

26

CEUX

GENMAB A/S

18/04/2024

10:49:13 AM

2,000.00

10

CEUX

GENMAB A/S

18/04/2024

10:49:13 AM

2,000.00

30

XCSE

GENMAB A/S

18/04/2024

10:49:13 AM

2,000.00

25

XCSE

GENMAB A/S

18/04/2024

10:49:13 AM

2,000.00

13

CEUX

GENMAB A/S

18/04/2024

10:49:17 AM

2,000.00

22

XCSE

GENMAB A/S

18/04/2024

10:49:17 AM

2,000.00

8

XCSE

GENMAB A/S

18/04/2024

10:49:17 AM

2,000.00

30

XCSE

95


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

10:49:17 AM

2,000.00

4

CEUX

GENMAB A/S

18/04/2024

10:50:11 AM

2,000.00

41

XCSE

GENMAB A/S

18/04/2024

10:50:11 AM

2,000.00

20

XCSE

GENMAB A/S

18/04/2024

10:50:11 AM

2,000.00

30

XCSE

GENMAB A/S

18/04/2024

10:50:11 AM

2,000.00

20

XCSE

GENMAB A/S

18/04/2024

10:50:11 AM

2,000.00

26

XCSE

GENMAB A/S

18/04/2024

10:50:13 AM

1,999.00

50

XCSE

GENMAB A/S

18/04/2024

10:50:13 AM

1,999.00

50

XCSE

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

45

CEUX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

18

CEUX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

7

TQEX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

2

TQEX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

7

AQEU

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

27

CEUX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

14

CEUX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

19

TQEX

GENMAB A/S

18/04/2024

10:53:02 AM

1,998.00

27

TQEX

GENMAB A/S

18/04/2024

10:55:24 AM

1,997.50

7

AQEU

GENMAB A/S

18/04/2024

10:55:24 AM

1,997.50

12

CEUX

GENMAB A/S

18/04/2024

10:55:24 AM

1,997.50

38

CEUX

GENMAB A/S

18/04/2024

10:55:24 AM

1,997.50

8

TQEX

GENMAB A/S

18/04/2024

10:55:24 AM

1,997.50

55

XCSE

GENMAB A/S

18/04/2024

10:58:30 AM

1,996.50

46

XCSE

GENMAB A/S

18/04/2024

10:58:30 AM

1,996.50

3

XCSE

GENMAB A/S

18/04/2024

10:58:30 AM

1,996.50

29

XCSE

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

21

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

4

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

23

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

25

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

6

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

7

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

18

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

1

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

22

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

25

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

1

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

19

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

25

CEUX

96


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

25

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

11

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

25

CEUX

GENMAB A/S

18/04/2024

11:01:52 AM

1,999.50

25

CEUX

GENMAB A/S

18/04/2024

11:04:42 AM

1,999.00

23

XCSE

GENMAB A/S

18/04/2024

11:04:42 AM

1,999.00

71

XCSE

GENMAB A/S

18/04/2024

11:05:35 AM

2,000.00

13

XCSE

GENMAB A/S

18/04/2024

11:06:00 AM

2,000.00

74

CEUX

GENMAB A/S

18/04/2024

11:06:00 AM

2,000.00

72

CEUX

GENMAB A/S

18/04/2024

11:11:01 AM

1,999.50

2

XCSE

GENMAB A/S

18/04/2024

11:12:24 AM

1,999.50

37

XCSE

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

6

AQEU

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

1

AQEU

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

34

AQEU

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

39

AQEU

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

42

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

9

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

42

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

9

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

38

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

9

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

9

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

9

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

3

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

7

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

5

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

15

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

5

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

15

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

7

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

5

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

7

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

5

TQEX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

8

XCSE

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

8

XCSE

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

87

XCSE

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

42

XCSE

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

1

CEUX

GENMAB A/S

18/04/2024

11:13:28 AM

1,999.50

12

CEUX

97


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

11:15:45 AM

1,996.00

44

XCSE

GENMAB A/S

18/04/2024

11:15:45 AM

1,996.00

18

XCSE

GENMAB A/S

18/04/2024

11:15:45 AM

1,996.00

18

XCSE

GENMAB A/S

18/04/2024

11:15:47 AM

1,996.00

10

XCSE

GENMAB A/S

18/04/2024

11:15:47 AM

1,996.00

34

XCSE

GENMAB A/S

18/04/2024

11:15:47 AM

1,996.00

34

XCSE

GENMAB A/S

18/04/2024

11:15:50 AM

1,994.50

53

XCSE

GENMAB A/S

18/04/2024

11:15:55 AM

1,994.50

29

XCSE

GENMAB A/S

18/04/2024

11:15:55 AM

1,994.50

24

XCSE

GENMAB A/S

18/04/2024

11:15:55 AM

1,994.50

24

XCSE

GENMAB A/S

18/04/2024

11:15:55 AM

1,994.50

12

XCSE

GENMAB A/S

18/04/2024

11:22:09 AM

1,993.00

48

XCSE

GENMAB A/S

18/04/2024

11:22:09 AM

1,993.00

44

CEUX

GENMAB A/S

18/04/2024

11:22:09 AM

1,993.00

6

TQEX

GENMAB A/S

18/04/2024

11:22:09 AM

1,993.00

7

AQEU

GENMAB A/S

18/04/2024

11:22:10 AM

1,992.50

45

XCSE

GENMAB A/S

18/04/2024

11:22:10 AM

1,992.50

2

XCSE

GENMAB A/S

18/04/2024

11:26:23 AM

1,993.50

39

CEUX

GENMAB A/S

18/04/2024

11:28:30 AM

1,995.00

21

CEUX

GENMAB A/S

18/04/2024

11:28:30 AM

1,995.00

23

XCSE

GENMAB A/S

18/04/2024

11:28:53 AM

1,995.00

28

CEUX

GENMAB A/S

18/04/2024

11:28:53 AM

1,995.00

54

CEUX

GENMAB A/S

18/04/2024

11:28:53 AM

1,994.50

41

CEUX

GENMAB A/S

18/04/2024

11:28:53 AM

1,994.50

37

CEUX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

41

CEUX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

7

TQEX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

46

XCSE

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

46

XCSE

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

45

XCSE

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

16

CEUX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

13

CEUX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

12

CEUX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

2

CEUX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

7

TQEX

GENMAB A/S

18/04/2024

11:30:35 AM

1,994.50

10

TQEX

GENMAB A/S

18/04/2024

11:32:51 AM

1,994.50

15

CEUX

GENMAB A/S

18/04/2024

11:32:51 AM

1,994.50

56

CEUX

GENMAB A/S

18/04/2024

11:37:23 AM

1,995.50

26

XCSE

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

19

XCSE

98


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

39

XCSE

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

39

XCSE

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

34

CEUX

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

51

CEUX

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

34

CEUX

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

11

CEUX

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

9

TQEX

GENMAB A/S

18/04/2024

11:37:40 AM

1,995.50

10

XCSE

GENMAB A/S

18/04/2024

11:41:44 AM

1,997.50

37

XCSE

GENMAB A/S

18/04/2024

11:41:49 AM

1,996.50

11

XCSE

GENMAB A/S

18/04/2024

11:41:49 AM

1,996.50

11

CEUX

GENMAB A/S

18/04/2024

11:42:09 AM

1,996.50

11

XCSE

GENMAB A/S

18/04/2024

11:42:09 AM

1,996.50

1

XCSE

GENMAB A/S

18/04/2024

11:44:49 AM

1,997.50

45

XCSE

GENMAB A/S

18/04/2024

11:44:49 AM

1,997.50

1

XCSE

GENMAB A/S

18/04/2024

11:44:49 AM

1,997.50

74

XCSE

GENMAB A/S

18/04/2024

11:44:49 AM

1,997.50

6

XCSE

GENMAB A/S

18/04/2024

11:46:16 AM

1,999.50

1

CEUX

GENMAB A/S

18/04/2024

11:46:16 AM

1,999.50

6

XCSE

GENMAB A/S

18/04/2024

11:46:16 AM

1,999.50

23

XCSE

GENMAB A/S

18/04/2024

11:48:17 AM

1,999.50

9

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

9

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

32

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

36

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

52

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

9

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

27

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

77

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

9

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

66

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

16

XCSE

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

1

AQEU

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

9

AQEU

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

2

AQEU

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

4

AQEU

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

1

AQEU

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

31

AQEU

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

50

CEUX

99


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

11

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

42

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

4

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

2

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

4

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

10

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

6

CEUX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

17

TQEX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

5

TQEX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

32

TQEX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

5

TQEX

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

1

AQEU

GENMAB A/S

18/04/2024

11:51:44 AM

1,999.50

6

AQEU

GENMAB A/S

18/04/2024

12:00:25 PM

1,999.00

8

CEUX

GENMAB A/S

18/04/2024

12:00:25 PM

1,999.00

6

TQEX

GENMAB A/S

18/04/2024

12:00:25 PM

1,999.00

44

XCSE

GENMAB A/S

18/04/2024

12:00:29 PM

1,999.00

36

CEUX

GENMAB A/S

18/04/2024

12:00:33 PM

1,999.00

1

CEUX

GENMAB A/S

18/04/2024

12:01:53 PM

1,998.50

19

XCSE

GENMAB A/S

18/04/2024

12:02:40 PM

1,998.50

18

XCSE

GENMAB A/S

18/04/2024

12:02:41 PM

1,998.50

8

XCSE

GENMAB A/S

18/04/2024

12:02:41 PM

1,998.50

16

XCSE

100


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

12:04:32 PM

1,999.00

1

CEUX

GENMAB A/S

18/04/2024

12:04:32 PM

1,999.00

8

CEUX

GENMAB A/S

18/04/2024

12:04:32 PM

1,999.00

26

CEUX

GENMAB A/S

18/04/2024

12:05:12 PM

1,999.00

5

CEUX

GENMAB A/S

18/04/2024

12:05:12 PM

1,999.00

30

CEUX

GENMAB A/S

18/04/2024

12:06:01 PM

1,999.00

38

CEUX

GENMAB A/S

18/04/2024

12:06:51 PM

1,999.00

17

CEUX

GENMAB A/S

18/04/2024

12:06:51 PM

1,999.00

9

CEUX

GENMAB A/S

18/04/2024

12:06:51 PM

1,999.00

14

CEUX

GENMAB A/S

18/04/2024

12:07:32 PM

1,999.00

8

TQEX

GENMAB A/S

18/04/2024

12:07:32 PM

1,999.00

8

TQEX

GENMAB A/S

18/04/2024

12:07:32 PM

1,999.00

19

XCSE

GENMAB A/S

18/04/2024

12:07:32 PM

1,999.00

6

XCSE

GENMAB A/S

18/04/2024

12:08:23 PM

1,999.00

8

TQEX

GENMAB A/S

18/04/2024

12:08:23 PM

1,999.00

24

XCSE

GENMAB A/S

18/04/2024

12:08:23 PM

1,999.00

6

XCSE

GENMAB A/S

18/04/2024

12:08:31 PM

1,998.00

44

XCSE

GENMAB A/S

18/04/2024

12:08:31 PM

1,998.00

3

XCSE

GENMAB A/S

18/04/2024

12:08:31 PM

1,998.00

87

XCSE

GENMAB A/S

18/04/2024

12:08:31 PM

1,998.00

47

XCSE

GENMAB A/S

18/04/2024

12:08:33 PM

1,997.50

28

CEUX

GENMAB A/S

18/04/2024

12:11:29 PM

1,996.50

79

XCSE

GENMAB A/S

18/04/2024

12:11:29 PM

1,996.50

10

AQEU

GENMAB A/S

18/04/2024

12:11:29 PM

1,996.50

71

CEUX

GENMAB A/S

18/04/2024

12:11:29 PM

1,996.50

11

CEUX

GENMAB A/S

18/04/2024

12:17:09 PM

1,997.50

19

CEUX

GENMAB A/S

18/04/2024

12:17:09 PM

1,997.50

10

CEUX

GENMAB A/S

18/04/2024

12:17:15 PM

1,997.50

8

CEUX

GENMAB A/S

18/04/2024

12:17:42 PM

1,997.50

19

CEUX

GENMAB A/S

18/04/2024

12:17:48 PM

1,997.50

17

CEUX

GENMAB A/S

18/04/2024

12:18:16 PM

1,996.50

19

CEUX

GENMAB A/S

18/04/2024

12:19:00 PM

1,997.50

16

TQEX

GENMAB A/S

18/04/2024

12:19:01 PM

1,997.50

19

TQEX

GENMAB A/S

18/04/2024

12:19:34 PM

1,997.00

62

XCSE

GENMAB A/S

18/04/2024

12:19:34 PM

1,997.00

74

XCSE

GENMAB A/S

18/04/2024

12:19:34 PM

1,997.00

18

TQEX

GENMAB A/S

18/04/2024

12:22:36 PM

1,997.00

3

AQEU

GENMAB A/S

18/04/2024

12:22:36 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

12:22:36 PM

1,997.00

4

XCSE

101


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

12:22:37 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

12:22:37 PM

1,997.00

10

XCSE

GENMAB A/S

18/04/2024

12:23:23 PM

1,997.50

11

XCSE

GENMAB A/S

18/04/2024

12:24:36 PM

1,997.50

1

XCSE

GENMAB A/S

18/04/2024

12:24:56 PM

1,998.50

7

CEUX

GENMAB A/S

18/04/2024

12:24:56 PM

1,998.50

73

CEUX

GENMAB A/S

18/04/2024

12:24:56 PM

1,998.00

74

CEUX

GENMAB A/S

18/04/2024

12:24:56 PM

1,998.00

117

CEUX

GENMAB A/S

18/04/2024

12:24:56 PM

1,998.00

18

TQEX

GENMAB A/S

18/04/2024

12:24:56 PM

1,998.00

130

XCSE

GENMAB A/S

18/04/2024

12:31:29 PM

1,997.00

84

CEUX

GENMAB A/S

18/04/2024

12:31:29 PM

1,997.00

4

CEUX

GENMAB A/S

18/04/2024

12:31:29 PM

1,997.00

5

CEUX

GENMAB A/S

18/04/2024

12:31:29 PM

1,997.00

7

CEUX

GENMAB A/S

18/04/2024

12:32:19 PM

1,996.50

22

XCSE

GENMAB A/S

18/04/2024

12:32:19 PM

1,996.50

69

XCSE

GENMAB A/S

18/04/2024

12:32:20 PM

1,996.50

22

XCSE

GENMAB A/S

18/04/2024

12:32:32 PM

1,996.50

22

XCSE

GENMAB A/S

18/04/2024

12:32:32 PM

1,996.50

26

XCSE

GENMAB A/S

18/04/2024

12:37:32 PM

1,998.00

9

XCSE

GENMAB A/S

18/04/2024

12:37:32 PM

1,998.00

22

XCSE

GENMAB A/S

18/04/2024

12:37:32 PM

1,998.00

9

XCSE

GENMAB A/S

18/04/2024

12:38:19 PM

1,998.00

37

CEUX

GENMAB A/S

18/04/2024

12:39:35 PM

1,998.00

45

CEUX

GENMAB A/S

18/04/2024

12:39:35 PM

1,998.00

18

CEUX

GENMAB A/S

18/04/2024

12:40:05 PM

1,998.00

80

XCSE

GENMAB A/S

18/04/2024

12:40:05 PM

1,998.00

72

CEUX

GENMAB A/S

18/04/2024

12:40:05 PM

1,998.00

11

TQEX

GENMAB A/S

18/04/2024

12:45:08 PM

1,998.00

81

XCSE

GENMAB A/S

18/04/2024

12:45:08 PM

1,998.00

72

XCSE

GENMAB A/S

18/04/2024

12:45:08 PM

1,998.00

11

AQEU

GENMAB A/S

18/04/2024

12:45:08 PM

1,998.00

37

CEUX

GENMAB A/S

18/04/2024

12:45:08 PM

1,998.00

73

CEUX

GENMAB A/S

18/04/2024

12:45:08 PM

1,998.00

11

CEUX

GENMAB A/S

18/04/2024

12:47:05 PM

1,997.00

51

CEUX

GENMAB A/S

18/04/2024

12:50:31 PM

1,998.00

8

CEUX

GENMAB A/S

18/04/2024

12:50:31 PM

1,998.00

8

CEUX

GENMAB A/S

18/04/2024

12:50:31 PM

1,998.00

17

CEUX

GENMAB A/S

18/04/2024

12:50:31 PM

1,998.00

6

CEUX

102


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

12:51:22 PM

1,998.00

28

CEUX

GENMAB A/S

18/04/2024

12:51:22 PM

1,998.00

8

CEUX

GENMAB A/S

18/04/2024

12:53:12 PM

1,998.00

78

CEUX

GENMAB A/S

18/04/2024

12:53:45 PM

1,998.00

8

XCSE

GENMAB A/S

18/04/2024

12:53:45 PM

1,998.00

30

XCSE

GENMAB A/S

18/04/2024

12:54:31 PM

1,998.00

39

XCSE

GENMAB A/S

18/04/2024

12:54:41 PM

1,998.00

8

AQEU

GENMAB A/S

18/04/2024

12:54:41 PM

1,998.00

17

AQEU

GENMAB A/S

18/04/2024

12:54:41 PM

1,998.00

36

CEUX

GENMAB A/S

18/04/2024

12:54:41 PM

1,998.00

17

CEUX

GENMAB A/S

18/04/2024

12:54:41 PM

1,998.00

48

CEUX

GENMAB A/S

18/04/2024

12:54:41 PM

1,998.00

15

TQEX

GENMAB A/S

18/04/2024

12:54:41 PM

1,997.50

17

CEUX

GENMAB A/S

18/04/2024

12:54:41 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

12:58:38 PM

1,998.00

39

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

4

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

12

CEUX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

12

CEUX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

6

CEUX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

6

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

10

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

17

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

10

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

1

AQEU

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

2

AQEU

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

12

CEUX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

12

CEUX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

12

CEUX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

11

CEUX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

15

TQEX

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

10

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

29

XCSE

GENMAB A/S

18/04/2024

12:59:31 PM

1,997.50

10

CEUX

GENMAB A/S

18/04/2024

1:07:01 PM

1,997.50

12

AQEU

GENMAB A/S

18/04/2024

1:07:01 PM

1,997.50

7

AQEU

GENMAB A/S

18/04/2024

1:07:01 PM

1,997.50

39

XCSE

103


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

1:07:01 PM

1,997.50

90

XCSE

GENMAB A/S

18/04/2024

1:07:01 PM

1,997.50

68

XCSE

GENMAB A/S

18/04/2024

1:07:59 PM

1,997.50

39

CEUX

GENMAB A/S

18/04/2024

1:07:59 PM

1,997.50

6

TQEX

GENMAB A/S

18/04/2024

1:07:59 PM

1,997.50

26

XCSE

GENMAB A/S

18/04/2024

1:07:59 PM

1,997.50

26

XCSE

GENMAB A/S

18/04/2024

1:07:59 PM

1,997.50

43

XCSE

GENMAB A/S

18/04/2024

1:07:59 PM

1,997.50

10

TQEX

GENMAB A/S

18/04/2024

1:08:00 PM

1,997.50

6

CEUX

GENMAB A/S

18/04/2024

1:08:05 PM

1,997.50

17

CEUX

GENMAB A/S

18/04/2024

1:10:53 PM

1,999.50

32

CEUX

GENMAB A/S

18/04/2024

1:10:53 PM

1,999.50

40

CEUX

GENMAB A/S

18/04/2024

1:10:53 PM

1,999.50

12

TQEX

GENMAB A/S

18/04/2024

1:10:53 PM

1,999.50

74

XCSE

GENMAB A/S

18/04/2024

1:10:53 PM

1,999.50

6

XCSE

GENMAB A/S

18/04/2024

1:10:53 PM

1,999.00

5

XCSE

GENMAB A/S

18/04/2024

1:10:53 PM

1,999.00

63

XCSE

GENMAB A/S

18/04/2024

1:16:29 PM

1,998.50

21

XCSE

GENMAB A/S

18/04/2024

1:16:29 PM

1,998.50

20

CEUX

GENMAB A/S

18/04/2024

1:16:29 PM

1,998.50

5

TQEX

GENMAB A/S

18/04/2024

1:18:26 PM

1,998.50

20

CEUX

GENMAB A/S

18/04/2024

1:18:26 PM

1,998.50

4

TQEX

GENMAB A/S

18/04/2024

1:18:26 PM

1,998.50

21

XCSE

GENMAB A/S

18/04/2024

1:18:26 PM

1,998.50

16

XCSE

GENMAB A/S

18/04/2024

1:18:31 PM

1,998.50

25

CEUX

GENMAB A/S

18/04/2024

1:18:32 PM

1,998.00

35

CEUX

GENMAB A/S

18/04/2024

1:18:32 PM

1,998.00

24

CEUX

GENMAB A/S

18/04/2024

1:18:32 PM

1,998.00

48

XCSE

GENMAB A/S

18/04/2024

1:18:32 PM

1,998.00

36

CEUX

GENMAB A/S

18/04/2024

1:18:33 PM

1,998.00

19

XCSE

GENMAB A/S

18/04/2024

1:18:41 PM

1,998.00

11

XCSE

GENMAB A/S

18/04/2024

1:23:18 PM

1,998.00

11

XCSE

GENMAB A/S

18/04/2024

1:23:41 PM

1,998.00

20

XCSE

GENMAB A/S

18/04/2024

1:23:41 PM

1,998.00

4

XCSE

GENMAB A/S

18/04/2024

1:23:41 PM

1,998.00

14

XCSE

GENMAB A/S

18/04/2024

1:24:19 PM

1,998.50

7

CEUX

GENMAB A/S

18/04/2024

1:24:19 PM

1,998.50

5

CEUX

GENMAB A/S

18/04/2024

1:24:19 PM

1,998.50

17

CEUX

GENMAB A/S

18/04/2024

1:24:19 PM

1,998.50

12

CEUX

104


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

1:24:28 PM

1,998.00

26

XCSE

GENMAB A/S

18/04/2024

1:24:33 PM

1,998.00

26

XCSE

GENMAB A/S

18/04/2024

1:24:33 PM

1,998.00

2

XCSE

GENMAB A/S

18/04/2024

1:24:33 PM

1,998.00

5

XCSE

GENMAB A/S

18/04/2024

1:24:33 PM

1,998.00

21

XCSE

GENMAB A/S

18/04/2024

1:24:33 PM

1,998.00

26

XCSE

GENMAB A/S

18/04/2024

1:24:59 PM

1,997.50

8

XCSE

GENMAB A/S

18/04/2024

1:24:59 PM

1,997.50

2

XCSE

GENMAB A/S

18/04/2024

1:24:59 PM

1,997.50

9

CEUX

GENMAB A/S

18/04/2024

1:24:59 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

1:25:27 PM

1,997.50

42

XCSE

GENMAB A/S

18/04/2024

1:25:27 PM

1,997.50

60

XCSE

GENMAB A/S

18/04/2024

1:29:49 PM

1,998.50

34

XCSE

GENMAB A/S

18/04/2024

1:30:33 PM

1,998.50

15

CEUX

GENMAB A/S

18/04/2024

1:30:33 PM

1,998.50

1

CEUX

GENMAB A/S

18/04/2024

1:30:33 PM

1,998.50

9

CEUX

GENMAB A/S

18/04/2024

1:30:33 PM

1,998.50

6

CEUX

GENMAB A/S

18/04/2024

1:30:33 PM

1,998.50

5

XCSE

GENMAB A/S

18/04/2024

1:30:44 PM

1,998.00

12

CEUX

GENMAB A/S

18/04/2024

1:31:29 PM

1,998.50

36

XCSE

GENMAB A/S

18/04/2024

1:32:18 PM

1,998.50

21

XCSE

GENMAB A/S

18/04/2024

1:32:28 PM

1,998.50

13

XCSE

GENMAB A/S

18/04/2024

1:33:07 PM

1,998.50

23

XCSE

GENMAB A/S

18/04/2024

1:33:07 PM

1,998.50

18

XCSE

GENMAB A/S

18/04/2024

1:33:57 PM

1,998.50

41

XCSE

GENMAB A/S

18/04/2024

1:34:38 PM

1,998.50

39

XCSE

GENMAB A/S

18/04/2024

1:35:37 PM

1,998.50

38

XCSE

GENMAB A/S

18/04/2024

1:36:17 PM

1,998.50

7

CEUX

GENMAB A/S

18/04/2024

1:36:17 PM

1,998.50

13

CEUX

GENMAB A/S

18/04/2024

1:36:17 PM

1,998.50

4

TQEX

GENMAB A/S

18/04/2024

1:36:50 PM

1,998.50

21

CEUX

GENMAB A/S

18/04/2024

1:36:50 PM

1,998.50

15

CEUX

GENMAB A/S

18/04/2024

1:37:07 PM

1,998.00

11

XCSE

GENMAB A/S

18/04/2024

1:37:07 PM

1,998.00

12

CEUX

GENMAB A/S

18/04/2024

1:37:07 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:38:09 PM

1,998.00

18

CEUX

GENMAB A/S

18/04/2024

1:38:09 PM

1,998.00

18

CEUX

GENMAB A/S

18/04/2024

1:38:16 PM

1,998.00

4

CEUX

GENMAB A/S

18/04/2024

1:38:16 PM

1,998.00

8

XCSE

105


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

1:38:23 PM

1,998.00

4

CEUX

GENMAB A/S

18/04/2024

1:38:23 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:38:23 PM

1,998.00

8

XCSE

GENMAB A/S

18/04/2024

1:38:31 PM

1,998.00

8

CEUX

GENMAB A/S

18/04/2024

1:38:31 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:38:31 PM

1,998.00

7

XCSE

GENMAB A/S

18/04/2024

1:38:59 PM

1,998.00

9

CEUX

GENMAB A/S

18/04/2024

1:38:59 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:39:08 PM

1,998.00

9

CEUX

GENMAB A/S

18/04/2024

1:39:08 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:39:08 PM

1,998.00

8

XCSE

GENMAB A/S

18/04/2024

1:39:22 PM

1,998.00

9

CEUX

GENMAB A/S

18/04/2024

1:39:22 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:39:22 PM

1,998.00

6

XCSE

GENMAB A/S

18/04/2024

1:40:13 PM

1,998.00

8

CEUX

GENMAB A/S

18/04/2024

1:40:13 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:40:13 PM

1,998.00

7

XCSE

GENMAB A/S

18/04/2024

1:40:45 PM

1,998.00

8

CEUX

GENMAB A/S

18/04/2024

1:40:45 PM

1,998.00

5

TQEX

GENMAB A/S

18/04/2024

1:40:45 PM

1,998.00

8

CEUX

GENMAB A/S

18/04/2024

1:40:45 PM

1,998.00

7

XCSE

GENMAB A/S

18/04/2024

1:41:45 PM

1,998.00

41

CEUX

GENMAB A/S

18/04/2024

1:43:34 PM

1,998.50

19

CEUX

GENMAB A/S

18/04/2024

1:43:34 PM

1,998.50

61

CEUX

GENMAB A/S

18/04/2024

1:44:22 PM

1,998.50

17

CEUX

GENMAB A/S

18/04/2024

1:44:29 PM

1,998.50

17

CEUX

GENMAB A/S

18/04/2024

1:44:36 PM

1,998.50

2

CEUX

GENMAB A/S

18/04/2024

1:44:39 PM

1,998.50

7

CEUX

GENMAB A/S

18/04/2024

1:44:49 PM

1,998.50

14

CEUX

GENMAB A/S

18/04/2024

1:44:59 PM

1,998.50

21

CEUX

GENMAB A/S

18/04/2024

1:45:12 PM

1,998.50

20

CEUX

GENMAB A/S

18/04/2024

1:45:29 PM

1,998.50

14

CEUX

GENMAB A/S

18/04/2024

1:45:32 PM

1,998.50

6

CEUX

GENMAB A/S

18/04/2024

1:45:46 PM

1,998.50

20

CEUX

GENMAB A/S

18/04/2024

1:46:00 PM

1,998.50

20

CEUX

GENMAB A/S

18/04/2024

1:46:41 PM

1,998.50

9

AQEU

GENMAB A/S

18/04/2024

1:46:41 PM

1,998.50

49

CEUX

GENMAB A/S

18/04/2024

1:46:41 PM

1,998.50

8

TQEX

GENMAB A/S

18/04/2024

1:48:12 PM

1,998.50

23

XCSE

106


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

1:48:12 PM

1,998.50

86

XCSE

GENMAB A/S

18/04/2024

1:48:12 PM

1,998.50

15

XCSE

GENMAB A/S

18/04/2024

1:48:12 PM

1,998.50

8

XCSE

GENMAB A/S

18/04/2024

1:48:12 PM

1,998.50

14

XCSE

GENMAB A/S

18/04/2024

1:48:16 PM

1,998.00

63

XCSE

GENMAB A/S

18/04/2024

1:48:16 PM

1,998.00

43

XCSE

GENMAB A/S

18/04/2024

1:48:16 PM

1,998.00

43

XCSE

GENMAB A/S

18/04/2024

1:54:43 PM

1,998.50

30

CEUX

GENMAB A/S

18/04/2024

1:54:43 PM

1,998.50

6

CEUX

GENMAB A/S

18/04/2024

1:54:49 PM

1,997.50

11

AQEU

GENMAB A/S

18/04/2024

1:54:49 PM

1,997.50

5

CEUX

GENMAB A/S

18/04/2024

1:54:49 PM

1,997.50

73

CEUX

GENMAB A/S

18/04/2024

1:54:49 PM

1,997.50

11

TQEX

GENMAB A/S

18/04/2024

1:54:49 PM

1,997.50

44

XCSE

GENMAB A/S

18/04/2024

1:54:49 PM

1,997.50

11

XCSE

GENMAB A/S

18/04/2024

1:54:49 PM

1,997.50

32

XCSE

GENMAB A/S

18/04/2024

1:54:58 PM

1,997.50

1

TQEX

GENMAB A/S

18/04/2024

2:00:30 PM

1,997.50

7

AQEU

GENMAB A/S

18/04/2024

2:00:30 PM

1,997.50

11

CEUX

GENMAB A/S

18/04/2024

2:00:30 PM

1,997.50

24

XCSE

GENMAB A/S

18/04/2024

2:00:43 PM

1,997.50

8

CEUX

GENMAB A/S

18/04/2024

2:00:52 PM

1,997.50

98

XCSE

GENMAB A/S

18/04/2024

2:00:52 PM

1,997.50

19

CEUX

GENMAB A/S

18/04/2024

2:00:57 PM

1,997.50

17

XCSE

GENMAB A/S

18/04/2024

2:00:57 PM

1,997.50

36

XCSE

GENMAB A/S

18/04/2024

2:01:01 PM

1,997.50

14

XCSE

GENMAB A/S

18/04/2024

2:01:01 PM

1,997.50

48

XCSE

GENMAB A/S

18/04/2024

2:05:14 PM

1,998.00

8

XCSE

GENMAB A/S

18/04/2024

2:05:14 PM

1,998.00

14

XCSE

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

2

AQEU

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

6

AQEU

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

31

CEUX

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

51

CEUX

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

6

TQEX

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

37

XCSE

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

16

XCSE

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

156

XCSE

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

71

CEUX

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

17

TQEX

107


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

2:06:37 PM

1,997.50

15

CEUX

GENMAB A/S

18/04/2024

2:10:09 PM

1,995.50

47

XCSE

GENMAB A/S

18/04/2024

2:10:09 PM

1,995.50

47

XCSE

GENMAB A/S

18/04/2024

2:10:13 PM

1,995.50

15

XCSE

GENMAB A/S

18/04/2024

2:14:15 PM

1,994.00

9

XCSE

GENMAB A/S

18/04/2024

2:14:15 PM

1,994.00

9

CEUX

GENMAB A/S

18/04/2024

2:14:15 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

2:14:15 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

2:14:15 PM

1,994.00

1

TQEX

GENMAB A/S

18/04/2024

2:14:15 PM

1,994.00

9

XCSE

GENMAB A/S

18/04/2024

2:14:15 PM

1,994.00

9

XCSE

GENMAB A/S

18/04/2024

2:15:19 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

2:16:20 PM

1,994.50

1

AQEU

GENMAB A/S

18/04/2024

2:16:20 PM

1,994.50

17

AQEU

GENMAB A/S

18/04/2024

2:16:39 PM

1,994.50

17

AQEU

GENMAB A/S

18/04/2024

2:18:48 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

2:19:33 PM

1,994.50

44

XCSE

GENMAB A/S

18/04/2024

2:19:46 PM

1,994.50

6

XCSE

GENMAB A/S

18/04/2024

2:19:46 PM

1,994.50

104

XCSE

GENMAB A/S

18/04/2024

2:19:46 PM

1,994.50

50

XCSE

GENMAB A/S

18/04/2024

2:19:46 PM

1,994.50

41

XCSE

GENMAB A/S

18/04/2024

2:22:04 PM

1,997.50

23

XCSE

GENMAB A/S

18/04/2024

2:22:04 PM

1,997.50

13

XCSE

GENMAB A/S

18/04/2024

2:22:48 PM

1,997.50

34

XCSE

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

10

CEUX

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

10

CEUX

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

1

TQEX

GENMAB A/S

18/04/2024

2:23:02 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:23:03 PM

1,996.50

10

CEUX

GENMAB A/S

18/04/2024

2:23:03 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

2:23:03 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:24:39 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:25:05 PM

1,997.00

19

XCSE

GENMAB A/S

18/04/2024

2:25:05 PM

1,997.50

17

XCSE

GENMAB A/S

18/04/2024

2:25:46 PM

1,997.50

23

XCSE

108


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

10

CEUX

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

5

XCSE

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

5

XCSE

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

4

XCSE

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

4

XCSE

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

2:25:59 PM

1,996.50

4

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

22

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

28

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

26

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

28

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

16

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

28

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

10

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

13

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

28

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

24

CEUX

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

28

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

4

XCSE

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

3

CEUX

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

27

CEUX

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

2:27:05 PM

1,996.50

4

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

6

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

6

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

6

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

4

AQEU

109


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

40

CEUX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

40

CEUX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

5

CEUX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

6

CEUX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

6

TQEX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

1

TQEX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

44

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

19

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

25

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

10

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,994.50

19

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,994.50

3

AQEU

GENMAB A/S

18/04/2024

2:30:08 PM

1,994.50

19

CEUX

GENMAB A/S

18/04/2024

2:30:08 PM

1,994.50

19

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,995.00

25

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,994.50

46

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,994.50

19

XCSE

GENMAB A/S

18/04/2024

2:30:08 PM

1,994.50

2

XCSE

GENMAB A/S

18/04/2024

2:37:50 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

2:37:50 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

2:37:50 PM

1,994.00

17

XCSE

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

1

AQEU

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

8

CEUX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

8

CEUX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

8

CEUX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

8

CEUX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

1

CEUX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

8

CEUX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

1

TQEX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

1

XCSE

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

16

XCSE

GENMAB A/S

18/04/2024

2:38:58 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

2:39:00 PM

1,994.00

18

XCSE

110


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

2:39:00 PM

1,994.00

4

XCSE

GENMAB A/S

18/04/2024

2:39:00 PM

1,994.00

14

XCSE

GENMAB A/S

18/04/2024

2:39:00 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

2:39:00 PM

1,994.00

22

XCSE

GENMAB A/S

18/04/2024

2:39:00 PM

1,994.00

18

XCSE

GENMAB A/S

18/04/2024

2:41:22 PM

1,992.00

11

CEUX

GENMAB A/S

18/04/2024

2:41:22 PM

1,992.00

45

CEUX

GENMAB A/S

18/04/2024

2:41:22 PM

1,992.00

22

XCSE

GENMAB A/S

18/04/2024

2:41:27 PM

1,992.00

4

CEUX

GENMAB A/S

18/04/2024

2:44:24 PM

1,991.00

27

XCSE

GENMAB A/S

18/04/2024

2:44:24 PM

1,991.00

1

CEUX

GENMAB A/S

18/04/2024

2:44:55 PM

1,991.50

38

AQEU

GENMAB A/S

18/04/2024

2:45:10 PM

1,991.00

27

XCSE

GENMAB A/S

18/04/2024

2:45:56 PM

1,992.00

8

TQEX

GENMAB A/S

18/04/2024

2:46:00 PM

1,991.00

27

XCSE

GENMAB A/S

18/04/2024

2:46:00 PM

1,991.00

19

CEUX

GENMAB A/S

18/04/2024

2:46:02 PM

1,991.00

44

CEUX

GENMAB A/S

18/04/2024

2:46:02 PM

1,991.00

27

XCSE

GENMAB A/S

18/04/2024

2:46:02 PM

1,991.00

27

CEUX

GENMAB A/S

18/04/2024

2:46:19 PM

1,990.50

42

XCSE

GENMAB A/S

18/04/2024

2:46:20 PM

1,990.50

42

XCSE

GENMAB A/S

18/04/2024

2:46:20 PM

1,990.50

30

XCSE

GENMAB A/S

18/04/2024

2:46:20 PM

1,989.50

2

AQEU

GENMAB A/S

18/04/2024

2:46:20 PM

1,989.50

6

CEUX

GENMAB A/S

18/04/2024

2:46:20 PM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

2:46:20 PM

1,989.50

15

XCSE

GENMAB A/S

18/04/2024

2:46:20 PM

1,989.50

3

XCSE

GENMAB A/S

18/04/2024

2:46:21 PM

1,989.50

11

CEUX

GENMAB A/S

18/04/2024

2:46:21 PM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

2:46:21 PM

1,989.50

18

XCSE

GENMAB A/S

18/04/2024

2:50:57 PM

1,990.00

11

XCSE

GENMAB A/S

18/04/2024

2:50:57 PM

1,990.00

29

XCSE

GENMAB A/S

18/04/2024

2:51:34 PM

1,990.00

11

XCSE

GENMAB A/S

18/04/2024

2:51:34 PM

1,990.00

23

XCSE

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

47

XCSE

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

39

XCSE

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

47

XCSE

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

2

XCSE

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.00

95

XCSE

111


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

43

CEUX

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

6

AQEU

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

6

AQEU

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

2

AQEU

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

28

CEUX

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

15

CEUX

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

37

CEUX

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

6

AQEU

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.50

20

XCSE

GENMAB A/S

18/04/2024

2:52:05 PM

1,992.00

21

XCSE

GENMAB A/S

18/04/2024

2:56:46 PM

1,991.00

19

CEUX

GENMAB A/S

18/04/2024

2:56:46 PM

1,991.00

33

CEUX

GENMAB A/S

18/04/2024

2:56:46 PM

1,991.00

25

XCSE

GENMAB A/S

18/04/2024

2:56:46 PM

1,991.00

36

CEUX

GENMAB A/S

18/04/2024

2:58:00 PM

1,989.00

48

XCSE

GENMAB A/S

18/04/2024

2:58:01 PM

1,989.00

48

XCSE

GENMAB A/S

18/04/2024

2:58:01 PM

1,989.00

35

XCSE

GENMAB A/S

18/04/2024

3:02:27 PM

1,990.00

10

CEUX

GENMAB A/S

18/04/2024

3:02:27 PM

1,990.00

4

CEUX

GENMAB A/S

18/04/2024

3:02:27 PM

1,990.00

1

CEUX

GENMAB A/S

18/04/2024

3:02:27 PM

1,990.00

2

CEUX

GENMAB A/S

18/04/2024

3:02:27 PM

1,990.00

5

CEUX

GENMAB A/S

18/04/2024

3:02:27 PM

1,990.00

4

TQEX

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

8

XCSE

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

8

XCSE

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

8

XCSE

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

9

CEUX

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

5

CEUX

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

4

CEUX

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

3

CEUX

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

3

TQEX

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

2

TQEX

GENMAB A/S

18/04/2024

3:02:31 PM

1,989.50

3

XCSE

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

9

XCSE

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

10

CEUX

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

5

TQEX

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

1

AQEU

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

2

AQEU

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

10

CEUX

112


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

3

CEUX

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

5

TQEX

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

2

TQEX

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

9

XCSE

GENMAB A/S

18/04/2024

3:02:58 PM

1,990.00

13

XCSE

GENMAB A/S

18/04/2024

3:03:04 PM

1,990.00

1

AQEU

GENMAB A/S

18/04/2024

3:03:04 PM

1,990.00

10

CEUX

GENMAB A/S

18/04/2024

3:03:04 PM

1,990.00

5

TQEX

GENMAB A/S

18/04/2024

3:03:04 PM

1,990.00

9

XCSE

GENMAB A/S

18/04/2024

3:03:05 PM

1,990.00

1

AQEU

GENMAB A/S

18/04/2024

3:03:05 PM

1,990.00

10

CEUX

GENMAB A/S

18/04/2024

3:03:05 PM

1,990.00

10

CEUX

GENMAB A/S

18/04/2024

3:03:05 PM

1,990.00

5

TQEX

GENMAB A/S

18/04/2024

3:03:05 PM

1,990.00

9

XCSE

GENMAB A/S

18/04/2024

3:04:52 PM

1,991.00

11

XCSE

GENMAB A/S

18/04/2024

3:04:52 PM

1,991.00

31

XCSE

GENMAB A/S

18/04/2024

3:04:52 PM

1,991.00

42

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,993.00

37

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,993.00

37

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,993.00

5

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,993.00

37

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,993.00

37

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,993.00

3

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,992.50

10

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,992.50

36

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,992.50

23

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,992.50

46

XCSE

GENMAB A/S

18/04/2024

3:06:44 PM

1,992.50

35

XCSE

GENMAB A/S

18/04/2024

3:12:40 PM

1,995.00

27

XCSE

GENMAB A/S

18/04/2024

3:12:40 PM

1,995.00

21

XCSE

GENMAB A/S

18/04/2024

3:12:40 PM

1,995.00

27

XCSE

GENMAB A/S

18/04/2024

3:12:40 PM

1,995.00

21

XCSE

GENMAB A/S

18/04/2024

3:12:40 PM

1,995.00

21

XCSE

GENMAB A/S

18/04/2024

3:12:40 PM

1,995.00

6

XCSE

GENMAB A/S

18/04/2024

3:12:40 PM

1,995.00

21

XCSE

GENMAB A/S

18/04/2024

3:12:41 PM

1,995.00

27

XCSE

GENMAB A/S

18/04/2024

3:12:41 PM

1,995.00

21

XCSE

GENMAB A/S

18/04/2024

3:12:41 PM

1,995.00

27

XCSE

GENMAB A/S

18/04/2024

3:12:41 PM

1,995.00

21

XCSE

113


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:12:41 PM

1,995.00

25

CEUX

GENMAB A/S

18/04/2024

3:12:41 PM

1,995.00

2

XCSE

GENMAB A/S

18/04/2024

3:15:43 PM

1,994.00

95

XCSE

GENMAB A/S

18/04/2024

3:16:11 PM

1,994.00

7

CEUX

GENMAB A/S

18/04/2024

3:16:11 PM

1,994.00

7

TQEX

GENMAB A/S

18/04/2024

3:16:11 PM

1,994.00

50

XCSE

GENMAB A/S

18/04/2024

3:16:11 PM

1,994.00

6

AQEU

GENMAB A/S

18/04/2024

3:16:22 PM

1,993.00

39

AQEU

GENMAB A/S

18/04/2024

3:19:27 PM

1,996.00

21

XCSE

GENMAB A/S

18/04/2024

3:19:27 PM

1,996.00

21

XCSE

GENMAB A/S

18/04/2024

3:19:27 PM

1,996.00

21

XCSE

GENMAB A/S

18/04/2024

3:19:27 PM

1,996.00

36

CEUX

GENMAB A/S

18/04/2024

3:19:27 PM

1,996.00

23

XCSE

GENMAB A/S

18/04/2024

3:19:27 PM

1,996.00

21

XCSE

GENMAB A/S

18/04/2024

3:19:27 PM

1,996.00

10

XCSE

GENMAB A/S

18/04/2024

3:22:15 PM

1,995.00

22

XCSE

GENMAB A/S

18/04/2024

3:22:15 PM

1,995.00

22

XCSE

GENMAB A/S

18/04/2024

3:22:15 PM

1,995.00

22

XCSE

GENMAB A/S

18/04/2024

3:22:15 PM

1,995.00

22

XCSE

GENMAB A/S

18/04/2024

3:22:15 PM

1,995.00

22

XCSE

GENMAB A/S

18/04/2024

3:22:15 PM

1,995.00

42

XCSE

GENMAB A/S

18/04/2024

3:25:23 PM

1,994.50

35

CEUX

GENMAB A/S

18/04/2024

3:25:23 PM

1,994.50

37

CEUX

GENMAB A/S

18/04/2024

3:25:23 PM

1,994.50

92

XCSE

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

11

CEUX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

11

CEUX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

11

CEUX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

11

CEUX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

8

CEUX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

22

TQEX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

3:28:00 PM

1,994.00

17

CEUX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

7

TQEX

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

10

XCSE

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

8

XCSE

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

10

XCSE

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

30

XCSE

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

8

AQEU

114


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

17

AQEU

GENMAB A/S

18/04/2024

3:28:00 PM

1,995.00

18

AQEU

GENMAB A/S

18/04/2024

3:29:34 PM

1,993.50

68

XCSE

GENMAB A/S

18/04/2024

3:29:34 PM

1,993.50

68

XCSE

GENMAB A/S

18/04/2024

3:29:34 PM

1,993.50

20

XCSE

GENMAB A/S

18/04/2024

3:29:34 PM

1,993.50

2

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

20

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

21

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

20

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

21

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

3

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

16

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

21

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

3

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

19

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

19

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

20

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

10

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

18

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

19

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

1

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

2

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

19

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

20

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

21

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

8

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

47

XCSE

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

5

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

4

AQEU

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

5

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

32

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

40

AQEU

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

7

AQEU

115


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

15

AQEU

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

15

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

22

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

10

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

10

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.50

6

TQEX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

4

CEUX

GENMAB A/S

18/04/2024

3:30:03 PM

1,991.00

10

CEUX

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

59

XCSE

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

9

XCSE

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

39

XCSE

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

33

CEUX

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

8

TQEX

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

8

TQEX

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

24

CEUX

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

8

AQEU

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

29

CEUX

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

8

TQEX

GENMAB A/S

18/04/2024

3:36:40 PM

1,980.50

36

CEUX

GENMAB A/S

18/04/2024

3:39:55 PM

1,983.50

49

XCSE

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

44

CEUX

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

15

XCSE

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

14

XCSE

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

7

AQEU

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

27

CEUX

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

6

TQEX

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

6

TQEX

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

8

AQEU

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

17

AQEU

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

36

CEUX

GENMAB A/S

18/04/2024

3:40:00 PM

1,983.50

2

TQEX

GENMAB A/S

18/04/2024

3:40:01 PM

1,982.00

22

CEUX

GENMAB A/S

18/04/2024

3:40:01 PM

1,982.00

22

CEUX

GENMAB A/S

18/04/2024

3:40:01 PM

1,982.00

5

TQEX

GENMAB A/S

18/04/2024

3:40:01 PM

1,982.00

23

XCSE

GENMAB A/S

18/04/2024

3:40:02 PM

1,982.00

22

CEUX

GENMAB A/S

18/04/2024

3:40:02 PM

1,982.00

23

XCSE

GENMAB A/S

18/04/2024

3:42:22 PM

1,985.00

56

XCSE

GENMAB A/S

18/04/2024

3:42:22 PM

1,985.00

9

AQEU

116


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:42:22 PM

1,985.00

45

CEUX

GENMAB A/S

18/04/2024

3:42:22 PM

1,985.00

19

CEUX

GENMAB A/S

18/04/2024

3:42:22 PM

1,985.00

10

TQEX

GENMAB A/S

18/04/2024

3:42:22 PM

1,985.00

15

XCSE

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

9

XCSE

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

1

AQEU

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

12

AQEU

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

10

CEUX

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

10

CEUX

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

4

CEUX

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

5

TQEX

GENMAB A/S

18/04/2024

3:43:25 PM

1,987.00

9

XCSE

GENMAB A/S

18/04/2024

3:43:29 PM

1,987.00

1

AQEU

GENMAB A/S

18/04/2024

3:43:29 PM

1,987.00

10

CEUX

GENMAB A/S

18/04/2024

3:43:29 PM

1,987.00

3

TQEX

GENMAB A/S

18/04/2024

3:43:29 PM

1,987.00

10

CEUX

GENMAB A/S

18/04/2024

3:43:29 PM

1,987.00

2

TQEX

GENMAB A/S

18/04/2024

3:43:29 PM

1,987.00

9

XCSE

GENMAB A/S

18/04/2024

3:43:33 PM

1,987.00

6

XCSE

GENMAB A/S

18/04/2024

3:43:33 PM

1,987.00

12

XCSE

GENMAB A/S

18/04/2024

3:43:33 PM

1,987.00

20

XCSE

GENMAB A/S

18/04/2024

3:43:33 PM

1,987.00

31

XCSE

GENMAB A/S

18/04/2024

3:43:33 PM

1,987.00

9

XCSE

GENMAB A/S

18/04/2024

3:43:33 PM

1,987.00

60

XCSE

GENMAB A/S

18/04/2024

3:43:33 PM

1,987.00

7

XCSE

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

1

AQEU

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

2

AQEU

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

1

AQEU

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

8

CEUX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

2

CEUX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

8

CEUX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

8

CEUX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

2

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

8

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

1

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

8

CEUX

117


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

5

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

11

TQEX

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

8

XCSE

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

10

XCSE

GENMAB A/S

18/04/2024

3:45:52 PM

1,989.50

8

XCSE

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

55

XCSE

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

20

XCSE

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

10

XCSE

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

91

XCSE

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

26

XCSE

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

25

XCSE

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

11

AQEU

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

11

AQEU

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

11

AQEU

GENMAB A/S

18/04/2024

3:47:04 PM

1,993.00

7

XCSE

GENMAB A/S

18/04/2024

3:47:55 PM

1,995.50

18

XCSE

GENMAB A/S

18/04/2024

3:47:55 PM

1,995.50

74

XCSE

GENMAB A/S

18/04/2024

3:47:55 PM

1,995.50

117

XCSE

GENMAB A/S

18/04/2024

3:49:19 PM

1,995.50

1

AQEU

GENMAB A/S

18/04/2024

3:49:19 PM

1,995.50

8

CEUX

GENMAB A/S

18/04/2024

3:49:19 PM

1,995.50

8

CEUX

GENMAB A/S

18/04/2024

3:49:19 PM

1,995.50

5

TQEX

GENMAB A/S

18/04/2024

3:49:19 PM

1,995.50

5

TQEX

GENMAB A/S

18/04/2024

3:49:19 PM

1,995.50

8

XCSE

GENMAB A/S

18/04/2024

3:49:19 PM

1,995.50

8

XCSE

GENMAB A/S

18/04/2024

3:50:21 PM

1,996.00

19

CEUX

GENMAB A/S

18/04/2024

3:50:21 PM

1,996.00

80

XCSE

GENMAB A/S

18/04/2024

3:50:21 PM

1,996.00

2

XCSE

GENMAB A/S

18/04/2024

3:50:21 PM

1,996.00

56

CEUX

GENMAB A/S

18/04/2024

3:50:21 PM

1,996.00

11

CEUX

GENMAB A/S

18/04/2024

3:50:21 PM

1,996.00

11

TQEX

GENMAB A/S

18/04/2024

3:51:19 PM

1,995.00

10

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

9

AQEU

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

65

CEUX

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

10

TQEX

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

12

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

20

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

52

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

2

XCSE

118


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

20

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

2

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

22

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

22

XCSE

GENMAB A/S

18/04/2024

3:52:06 PM

1,995.00

31

XCSE

GENMAB A/S

18/04/2024

3:54:03 PM

1,995.00

7

XCSE

GENMAB A/S

18/04/2024

3:54:03 PM

1,995.00

10

XCSE

GENMAB A/S

18/04/2024

3:54:03 PM

1,995.00

8

CEUX

GENMAB A/S

18/04/2024

3:54:03 PM

1,995.00

1

AQEU

GENMAB A/S

18/04/2024

3:54:03 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

1

AQEU

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

1

AQEU

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

17

AQEU

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

8

CEUX

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

1

AQEU

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

8

CEUX

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

4

XCSE

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

2

XCSE

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

1

XCSE

GENMAB A/S

18/04/2024

3:54:21 PM

1,995.00

6

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

22

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

24

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

22

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

24

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

22

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

2

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

10

XCSE

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

15

AQEU

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

7

AQEU

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

36

CEUX

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

17

AQEU

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

8

AQEU

GENMAB A/S

18/04/2024

3:54:48 PM

1,994.50

7

TQEX

GENMAB A/S

18/04/2024

3:56:03 PM

1,992.00

23

XCSE

GENMAB A/S

18/04/2024

3:56:03 PM

1,992.00

23

XCSE

GENMAB A/S

18/04/2024

3:56:03 PM

1,992.00

15

AQEU

GENMAB A/S

18/04/2024

3:56:03 PM

1,992.00

36

CEUX

119


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

3:56:03 PM

1,992.00

20

XCSE

GENMAB A/S

18/04/2024

3:56:03 PM

1,992.00

23

AQEU

GENMAB A/S

18/04/2024

3:56:04 PM

1,992.00

7

AQEU

GENMAB A/S

18/04/2024

3:57:27 PM

1,990.50

5

XCSE

GENMAB A/S

18/04/2024

3:57:27 PM

1,990.50

20

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

25

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

22

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

25

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

22

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

1

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

25

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

22

XCSE

GENMAB A/S

18/04/2024

3:59:12 PM

1,990.50

22

XCSE

GENMAB A/S

18/04/2024

3:59:13 PM

1,990.50

3

XCSE

GENMAB A/S

18/04/2024

3:59:13 PM

1,990.50

22

XCSE

GENMAB A/S

18/04/2024

3:59:36 PM

1,990.00

22

XCSE

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

5

AQEU

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

71

CEUX

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

12

TQEX

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

22

XCSE

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

9

XCSE

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

27

XCSE

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

44

XCSE

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

22

XCSE

GENMAB A/S

18/04/2024

3:59:45 PM

1,990.00

5

CEUX

GENMAB A/S

18/04/2024

4:00:00 PM

1,987.50

12

XCSE

GENMAB A/S

18/04/2024

4:00:00 PM

1,987.50

2

AQEU

GENMAB A/S

18/04/2024

4:00:00 PM

1,987.50

20

CEUX

GENMAB A/S

18/04/2024

4:00:00 PM

1,987.50

5

TQEX

GENMAB A/S

18/04/2024

4:02:04 PM

1,993.50

20

XCSE

GENMAB A/S

18/04/2024

4:02:44 PM

1,994.00

9

AQEU

GENMAB A/S

18/04/2024

4:02:44 PM

1,994.00

52

CEUX

GENMAB A/S

18/04/2024

4:02:44 PM

1,994.00

8

CEUX

GENMAB A/S

18/04/2024

4:02:44 PM

1,994.00

9

TQEX

GENMAB A/S

18/04/2024

4:02:44 PM

1,994.00

67

XCSE

GENMAB A/S

18/04/2024

4:03:29 PM

1,993.00

9

AQEU

GENMAB A/S

18/04/2024

4:03:29 PM

1,993.00

60

CEUX

GENMAB A/S

18/04/2024

4:03:29 PM

1,993.00

9

TQEX

GENMAB A/S

18/04/2024

4:03:29 PM

1,993.00

47

XCSE

120


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:03:29 PM

1,993.00

19

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

26

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

23

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

8

TQEX

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

10

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

16

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

23

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

3

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

23

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

3

XCSE

GENMAB A/S

18/04/2024

4:04:22 PM

1,993.00

14

XCSE

GENMAB A/S

18/04/2024

4:06:16 PM

1,993.00

41

CEUX

GENMAB A/S

18/04/2024

4:06:49 PM

1,993.00

55

XCSE

GENMAB A/S

18/04/2024

4:06:49 PM

1,993.00

10

XCSE

GENMAB A/S

18/04/2024

4:06:49 PM

1,993.00

9

AQEU

GENMAB A/S

18/04/2024

4:06:49 PM

1,993.00

86

CEUX

GENMAB A/S

18/04/2024

4:06:49 PM

1,993.00

59

CEUX

GENMAB A/S

18/04/2024

4:08:32 PM

1,991.00

8

AQEU

GENMAB A/S

18/04/2024

4:08:32 PM

1,991.00

53

CEUX

GENMAB A/S

18/04/2024

4:08:32 PM

1,991.00

8

TQEX

GENMAB A/S

18/04/2024

4:08:32 PM

1,991.00

58

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

20

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

66

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

66

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

11

AQEU

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

7

AQEU

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

4

AQEU

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

7

AQEU

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

11

AQEU

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

20

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

62

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

11

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

25

XCSE

GENMAB A/S

18/04/2024

4:10:41 PM

1,992.00

15

XCSE

GENMAB A/S

18/04/2024

4:13:17 PM

1,992.50

75

XCSE

GENMAB A/S

18/04/2024

4:13:17 PM

1,992.50

53

XCSE

GENMAB A/S

18/04/2024

4:13:17 PM

1,992.50

22

XCSE

GENMAB A/S

18/04/2024

4:15:43 PM

1,998.00

36

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

9

XCSE

121


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

1

AQEU

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

14

AQEU

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

1

AQEU

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

6

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

2

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

1

TQEX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

1

AQEU

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

1

AQEU

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

10

CEUX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

4:15:46 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:15:47 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:15:47 PM

1,997.00

9

XCSE

GENMAB A/S

18/04/2024

4:16:05 PM

1,996.50

84

CEUX

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

19

CEUX

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

3

CEUX

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

5

TQEX

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

18

CEUX

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

23

XCSE

GENMAB A/S

18/04/2024

4:16:09 PM

1,995.00

19

XCSE

122


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:19:09 PM

1,994.00

11

AQEU

GENMAB A/S

18/04/2024

4:19:09 PM

1,994.00

37

CEUX

GENMAB A/S

18/04/2024

4:19:09 PM

1,994.00

5

CEUX

GENMAB A/S

18/04/2024

4:19:09 PM

1,994.00

9

TQEX

GENMAB A/S

18/04/2024

4:19:09 PM

1,994.00

2

TQEX

GENMAB A/S

18/04/2024

4:19:09 PM

1,994.00

32

CEUX

GENMAB A/S

18/04/2024

4:19:09 PM

1,994.00

17

XCSE

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

1

AQEU

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

14

AQEU

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

9

CEUX

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

3

CEUX

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

6

CEUX

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

4

XCSE

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

61

XCSE

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

8

XCSE

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

28

XCSE

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

6

CEUX

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

1

AQEU

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

3

CEUX

GENMAB A/S

18/04/2024

4:20:26 PM

1,994.00

5

TQEX

GENMAB A/S

18/04/2024

4:22:49 PM

1,995.00

40

CEUX

GENMAB A/S

18/04/2024

4:23:13 PM

1,995.00

37

XCSE

GENMAB A/S

18/04/2024

4:23:13 PM

1,994.50

6

TQEX

GENMAB A/S

18/04/2024

4:23:13 PM

1,994.50

6

AQEU

GENMAB A/S

18/04/2024

4:23:13 PM

1,994.50

2

AQEU

GENMAB A/S

18/04/2024

4:23:13 PM

1,995.00

33

XCSE

GENMAB A/S

18/04/2024

4:23:55 PM

1,995.00

35

XCSE

GENMAB A/S

18/04/2024

4:24:10 PM

1,994.50

4

AQEU

GENMAB A/S

18/04/2024

4:24:10 PM

1,994.50

3

AQEU

GENMAB A/S

18/04/2024

4:24:10 PM

1,994.50

1

TQEX

GENMAB A/S

18/04/2024

4:24:10 PM

1,994.50

44

XCSE

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

3

AQEU

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

3

AQEU

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

24

CEUX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

19

CEUX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

5

TQEX

123


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

5

TQEX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

32

TQEX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

32

TQEX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

3

AQEU

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

4

AQEU

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

5

TQEX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

5

TQEX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

13

XCSE

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

24

XCSE

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

135

XCSE

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

24

XCSE

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

33

CEUX

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

21

AQEU

GENMAB A/S

18/04/2024

4:24:36 PM

1,994.50

3

AQEU

GENMAB A/S

18/04/2024

4:24:37 PM

1,994.50

7

AQEU

GENMAB A/S

18/04/2024

4:27:24 PM

1,993.50

19

AQEU

GENMAB A/S

18/04/2024

4:27:24 PM

1,993.50

5

TQEX

GENMAB A/S

18/04/2024

4:27:24 PM

1,993.50

19

TQEX

GENMAB A/S

18/04/2024

4:27:24 PM

1,993.50

171

XCSE

GENMAB A/S

18/04/2024

4:27:24 PM

1,993.50

3

AQEU

GENMAB A/S

18/04/2024

4:28:14 PM

1,994.00

8

AQEU

GENMAB A/S

18/04/2024

4:28:14 PM

1,994.00

75

XCSE

GENMAB A/S

18/04/2024

4:28:14 PM

1,994.00

23

XCSE

GENMAB A/S

18/04/2024

4:28:14 PM

1,994.00

65

XCSE

GENMAB A/S

18/04/2024

4:28:14 PM

1,994.00

13

AQEU

GENMAB A/S

18/04/2024

4:28:14 PM

1,994.00

22

TQEX

GENMAB A/S

18/04/2024

4:32:09 PM

1,994.50

2

AQEU

GENMAB A/S

18/04/2024

4:32:14 PM

1,995.50

3

CEUX

GENMAB A/S

18/04/2024

4:32:45 PM

1,995.00

3

AQEU

GENMAB A/S

18/04/2024

4:32:45 PM

1,995.00

7

XCSE

GENMAB A/S

18/04/2024

4:32:45 PM

1,995.00

16

XCSE

GENMAB A/S

18/04/2024

4:32:45 PM

1,995.00

8

XCSE

GENMAB A/S

18/04/2024

4:32:45 PM

1,995.00

19

XCSE

GENMAB A/S

18/04/2024

4:32:50 PM

1,995.50

26

TQEX

GENMAB A/S

18/04/2024

4:32:54 PM

1,995.50

9

TQEX

GENMAB A/S

18/04/2024

4:33:04 PM

1,995.50

19

TQEX

GENMAB A/S

18/04/2024

4:33:56 PM

1,997.00

24

XCSE

GENMAB A/S

18/04/2024

4:34:07 PM

1,997.00

19

AQEU

GENMAB A/S

18/04/2024

4:34:07 PM

1,997.00

7

AQEU

124


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:34:07 PM

1,997.00

80

XCSE

GENMAB A/S

18/04/2024

4:34:07 PM

1,997.00

201

XCSE

GENMAB A/S

18/04/2024

4:34:07 PM

1,997.00

23

XCSE

GENMAB A/S

18/04/2024

4:34:07 PM

1,997.00

23

XCSE

GENMAB A/S

18/04/2024

4:35:07 PM

1,997.50

91

XCSE

GENMAB A/S

18/04/2024

4:35:07 PM

1,997.50

8

XCSE

GENMAB A/S

18/04/2024

4:35:16 PM

1,997.50

13

AQEU

GENMAB A/S

18/04/2024

4:35:16 PM

1,997.50

99

XCSE

GENMAB A/S

18/04/2024

4:35:16 PM

1,997.50

3

XCSE

GENMAB A/S

18/04/2024

4:35:16 PM

1,997.50

13

AQEU

GENMAB A/S

18/04/2024

4:35:16 PM

1,997.50

13

AQEU

GENMAB A/S

18/04/2024

4:35:16 PM

1,997.50

1

AQEU

GENMAB A/S

18/04/2024

4:37:02 PM

1,999.00

19

AQEU

GENMAB A/S

18/04/2024

4:37:04 PM

1,999.00

299

XCSE

GENMAB A/S

18/04/2024

4:37:04 PM

1,999.00

16

XCSE

GENMAB A/S

18/04/2024

4:37:04 PM

1,999.00

21

AQEU

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

5

TQEX

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

32

TQEX

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

75

XCSE

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

75

XCSE

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

81

XCSE

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

56

XCSE

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

19

XCSE

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

18

XCSE

GENMAB A/S

18/04/2024

4:40:48 PM

1,997.00

137

XCSE

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

36

XCSE

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

110

XCSE

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

68

XCSE

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

14

AQEU

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

15

XCSE

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

27

XCSE

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

37

XCSE

GENMAB A/S

18/04/2024

4:42:24 PM

1,996.50

26

XCSE

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

15

XCSE

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

7

XCSE

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

8

XCSE

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

14

AQEU

125


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

14

AQEU

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

15

XCSE

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

2

XCSE

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

15

XCSE

GENMAB A/S

18/04/2024

4:44:08 PM

1,997.50

3

XCSE

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

15

XCSE

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

15

XCSE

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

19

AQEU

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

5

TQEX

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

7

TQEX

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

23

TQEX

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

23

TQEX

GENMAB A/S

18/04/2024

4:44:09 PM

1,997.50

20

TQEX

GENMAB A/S

18/04/2024

4:45:02 PM

1,996.50

6

AQEU

GENMAB A/S

18/04/2024

4:45:02 PM

1,996.50

1

AQEU

GENMAB A/S

18/04/2024

4:45:02 PM

1,996.50

48

XCSE

GENMAB A/S

18/04/2024

4:45:02 PM

1,996.50

17

XCSE

GENMAB A/S

18/04/2024

4:45:02 PM

1,996.50

2

AQEU

GENMAB A/S

18/04/2024

4:45:02 PM

1,996.50

43

XCSE

GENMAB A/S

18/04/2024

4:45:03 PM

1,996.50

1

AQEU

GENMAB A/S

18/04/2024

4:45:08 PM

1,996.50

3

AQEU

GENMAB A/S

18/04/2024

4:45:08 PM

1,996.50

5

XCSE

GENMAB A/S

18/04/2024

4:45:08 PM

1,996.50

5

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

14

AQEU

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

3

AQEU

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

14

AQEU

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

26

XCSE

126


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

75

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

9

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

18

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

75

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

4

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

14

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

18

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

77

XCSE

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

10

TQEX

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

3

AQEU

GENMAB A/S

18/04/2024

4:46:15 PM

1,996.50

20

XCSE

GENMAB A/S

18/04/2024

4:47:21 PM

1,996.00

200

XCSE

GENMAB A/S

18/04/2024

4:47:21 PM

1,996.00

25

XCSE

GENMAB A/S

18/04/2024

4:48:16 PM

1,995.00

19

AQEU

GENMAB A/S

18/04/2024

4:49:05 PM

1,996.50

75

XCSE

GENMAB A/S

18/04/2024

4:49:05 PM

1,996.50

5

XCSE

GENMAB A/S

18/04/2024

4:49:05 PM

1,996.50

62

XCSE

GENMAB A/S

18/04/2024

4:49:05 PM

1,996.50

26

XCSE

GENMAB A/S

18/04/2024

4:49:08 PM

1,996.50

5

XCSE

GENMAB A/S

18/04/2024

4:49:11 PM

1,996.00

3

AQEU

GENMAB A/S

18/04/2024

4:49:11 PM

1,996.00

18

XCSE

GENMAB A/S

18/04/2024

4:49:12 PM

1,996.00

3

AQEU

GENMAB A/S

18/04/2024

4:49:12 PM

1,996.00

18

XCSE

GENMAB A/S

18/04/2024

4:49:12 PM

1,996.00

3

AQEU

GENMAB A/S

18/04/2024

4:49:12 PM

1,996.00

18

XCSE

GENMAB A/S

18/04/2024

4:49:13 PM

1,996.00

3

AQEU

GENMAB A/S

18/04/2024

4:49:13 PM

1,996.00

18

XCSE

GENMAB A/S

18/04/2024

4:49:13 PM

1,996.00

3

AQEU

GENMAB A/S

18/04/2024

4:49:13 PM

1,996.00

15

XCSE

GENMAB A/S

18/04/2024

4:49:30 PM

1,996.50

154

XCSE

GENMAB A/S

18/04/2024

4:50:02 PM

1,997.50

51

XCSE

GENMAB A/S

18/04/2024

4:50:17 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

19

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

38

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

19

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

6

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

19

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

6

XCSE

127


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

19

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

6

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

19

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

9

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

3

AQEU

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

3

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

22

XCSE

GENMAB A/S

18/04/2024

4:50:27 PM

1,997.50

9

AQEU

GENMAB A/S

18/04/2024

4:51:02 PM

1,996.50

5

AQEU

GENMAB A/S

18/04/2024

4:51:02 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

4:51:02 PM

1,996.50

34

XCSE

GENMAB A/S

18/04/2024

4:51:02 PM

1,996.50

34

XCSE

GENMAB A/S

18/04/2024

4:51:02 PM

1,996.50

5

AQEU

GENMAB A/S

18/04/2024

4:51:02 PM

1,996.50

5

TQEX

GENMAB A/S

18/04/2024

4:51:02 PM

1,996.50

20

XCSE

GENMAB A/S

18/04/2024

4:51:04 PM

1,996.50

44

XCSE

GENMAB A/S

18/04/2024

4:51:04 PM

1,996.50

18

XCSE

GENMAB A/S

18/04/2024

4:51:36 PM

1,996.00

92

XCSE

GENMAB A/S

18/04/2024

4:51:36 PM

1,996.00

12

AQEU

GENMAB A/S

18/04/2024

4:51:36 PM

1,996.00

13

TQEX

GENMAB A/S

18/04/2024

4:51:55 PM

1,995.00

24

AQEU

GENMAB A/S

18/04/2024

4:51:55 PM

1,995.00

190

XCSE

GENMAB A/S

19/04/2024

9:02:50 AM

1,988.50

14

XCSE

GENMAB A/S

19/04/2024

9:02:50 AM

1,988.50

13

CEUX

GENMAB A/S

19/04/2024

9:03:33 AM

1,987.00

39

CEUX

GENMAB A/S

19/04/2024

9:03:33 AM

1,987.00

6

TQEX

GENMAB A/S

19/04/2024

9:03:33 AM

1,987.00

43

XCSE

GENMAB A/S

19/04/2024

9:04:04 AM

1,988.50

6

TQEX

GENMAB A/S

19/04/2024

9:04:04 AM

1,988.50

13

XCSE

GENMAB A/S

19/04/2024

9:04:10 AM

1,988.50

20

XCSE

GENMAB A/S

19/04/2024

9:04:10 AM

1,988.50

20

XCSE

GENMAB A/S

19/04/2024

9:04:10 AM

1,988.50

6

TQEX

GENMAB A/S

19/04/2024

9:05:18 AM

1,988.50

5

XCSE

GENMAB A/S

19/04/2024

9:05:18 AM

1,988.50

4

XCSE

GENMAB A/S

19/04/2024

9:05:18 AM

1,988.50

9

XCSE

GENMAB A/S

19/04/2024

9:05:18 AM

1,988.50

10

CEUX

GENMAB A/S

19/04/2024

9:05:18 AM

1,988.50

6

CEUX

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

14

CEUX

128


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

2

CEUX

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

12

CEUX

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

1

CEUX

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

6

TQEX

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

13

CEUX

GENMAB A/S

19/04/2024

9:05:24 AM

1,987.50

1

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

13

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

3

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

11

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

6

TQEX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

14

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

1

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

13

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

1

CEUX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

6

TQEX

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

15

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

9

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

6

XCSE

GENMAB A/S

19/04/2024

9:05:25 AM

1,987.50

9

XCSE

GENMAB A/S

19/04/2024

9:05:46 AM

1,986.50

2

CEUX

GENMAB A/S

19/04/2024

9:06:10 AM

1,990.00

35

CEUX

GENMAB A/S

19/04/2024

9:06:10 AM

1,990.00

46

XCSE

GENMAB A/S

19/04/2024

9:06:10 AM

1,990.00

8

CEUX

GENMAB A/S

19/04/2024

9:06:10 AM

1,990.00

35

CEUX

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

46

XCSE

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

20

XCSE

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

26

XCSE

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

6

XCSE

129


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

18

XCSE

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

21

XCSE

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

43

CEUX

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

43

CEUX

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

7

XCSE

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

7

CEUX

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

17

CEUX

GENMAB A/S

19/04/2024

9:06:12 AM

1,990.00

18

XCSE

GENMAB A/S

19/04/2024

9:09:43 AM

1,975.50

5

XCSE

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

3

XCSE

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

8

XCSE

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

9

CEUX

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

9

CEUX

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

5

TQEX

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

5

TQEX

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

9

CEUX

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

5

TQEX

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

3

XCSE

GENMAB A/S

19/04/2024

9:10:04 AM

1,975.50

5

XCSE

GENMAB A/S

19/04/2024

9:11:09 AM

1,978.00

12

XCSE

GENMAB A/S

19/04/2024

9:11:09 AM

1,978.00

47

XCSE

GENMAB A/S

19/04/2024

9:11:09 AM

1,978.00

12

CEUX

GENMAB A/S

19/04/2024

9:11:11 AM

1,978.00

26

XCSE

GENMAB A/S

19/04/2024

9:11:11 AM

1,978.00

35

XCSE

GENMAB A/S

19/04/2024

9:11:11 AM

1,978.00

55

XCSE

GENMAB A/S

19/04/2024

9:11:11 AM

1,978.00

82

XCSE

GENMAB A/S

19/04/2024

9:11:11 AM

1,978.00

5

AQEU

GENMAB A/S

19/04/2024

9:11:11 AM

1,978.00

31

CEUX

GENMAB A/S

19/04/2024

9:12:31 AM

1,979.50

41

XCSE

GENMAB A/S

19/04/2024

9:12:31 AM

1,979.50

41

XCSE

GENMAB A/S

19/04/2024

9:12:31 AM

1,979.50

26

XCSE

GENMAB A/S

19/04/2024

9:14:30 AM

1,979.00

11

XCSE

GENMAB A/S

19/04/2024

9:14:30 AM

1,979.00

10

CEUX

GENMAB A/S

19/04/2024

9:14:30 AM

1,979.00

10

CEUX

GENMAB A/S

19/04/2024

9:14:30 AM

1,979.00

11

XCSE

GENMAB A/S

19/04/2024

9:14:30 AM

1,979.00

11

XCSE

GENMAB A/S

19/04/2024

9:14:30 AM

1,979.00

4

XCSE

GENMAB A/S

19/04/2024

9:15:24 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:24 AM

1,983.50

9

XCSE

130


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:15:24 AM

1,983.50

9

CEUX

GENMAB A/S

19/04/2024

9:15:24 AM

1,983.50

5

TQEX

GENMAB A/S

19/04/2024

9:15:24 AM

1,983.50

9

CEUX

GENMAB A/S

19/04/2024

9:15:24 AM

1,983.50

5

TQEX

GENMAB A/S

19/04/2024

9:15:51 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:51 AM

1,983.50

9

CEUX

GENMAB A/S

19/04/2024

9:15:51 AM

1,983.50

1

CEUX

GENMAB A/S

19/04/2024

9:15:51 AM

1,983.50

8

CEUX

GENMAB A/S

19/04/2024

9:15:51 AM

1,983.50

1

CEUX

GENMAB A/S

19/04/2024

9:15:51 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

8

CEUX

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

1

CEUX

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

8

CEUX

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

9

CEUX

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

9

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

2

CEUX

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

1

AQEU

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

7

CEUX

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

5

TQEX

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

1

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,982.00

39

XCSE

GENMAB A/S

19/04/2024

9:15:53 AM

1,982.50

8

AQEU

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.00

8

AQEU

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.00

4

AQEU

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.00

4

AQEU

GENMAB A/S

19/04/2024

9:15:53 AM

1,983.50

6

AQEU

GENMAB A/S

19/04/2024

9:16:18 AM

1,982.00

32

XCSE

GENMAB A/S

19/04/2024

9:16:18 AM

1,982.00

28

XCSE

GENMAB A/S

19/04/2024

9:16:18 AM

1,982.00

31

CEUX

GENMAB A/S

19/04/2024

9:16:18 AM

1,982.00

5

TQEX

GENMAB A/S

19/04/2024

9:16:18 AM

1,982.00

27

CEUX

GENMAB A/S

19/04/2024

9:16:18 AM

1,982.00

5

TQEX

GENMAB A/S

19/04/2024

9:17:09 AM

1,980.50

33

XCSE

GENMAB A/S

19/04/2024

9:17:09 AM

1,980.50

27

CEUX

GENMAB A/S

19/04/2024

9:17:09 AM

1,980.50

4

CEUX

131


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:17:09 AM

1,980.50

5

TQEX

GENMAB A/S

19/04/2024

9:17:09 AM

1,980.50

27

XCSE

GENMAB A/S

19/04/2024

9:17:33 AM

1,980.50

74

XCSE

GENMAB A/S

19/04/2024

9:17:33 AM

1,980.50

27

XCSE

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

22

XCSE

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

3

AQEU

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

21

CEUX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

8

CEUX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

5

TQEX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

11

CEUX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

3

AQEU

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

10

CEUX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

5

TQEX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

22

XCSE

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.00

21

CEUX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.00

12

CEUX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.00

5

TQEX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

3

AQEU

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

15

AQEU

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

1

CEUX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

5

TQEX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

27

TQEX

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.00

22

XCSE

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.00

14

XCSE

GENMAB A/S

19/04/2024

9:17:33 AM

1,979.50

10

XCSE

GENMAB A/S

19/04/2024

9:17:34 AM

1,979.00

3

AQEU

GENMAB A/S

19/04/2024

9:17:34 AM

1,979.00

1

CEUX

GENMAB A/S

19/04/2024

9:17:34 AM

1,979.00

5

TQEX

GENMAB A/S

19/04/2024

9:17:34 AM

1,979.50

16

AQEU

GENMAB A/S

19/04/2024

9:21:46 AM

1,976.00

7

AQEU

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

1

AQEU

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

51

CEUX

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

15

XCSE

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

41

XCSE

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

23

XCSE

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

11

XCSE

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

56

XCSE

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

23

XCSE

GENMAB A/S

19/04/2024

9:22:25 AM

1,976.00

1

XCSE

132


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:23:44 AM

1,973.00

9

XCSE

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

20

CEUX

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

7

CEUX

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

7

CEUX

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

7

CEUX

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

10

CEUX

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

3

CEUX

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

2

TQEX

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

28

XCSE

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

23

XCSE

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

23

XCSE

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

5

XCSE

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

23

XCSE

GENMAB A/S

19/04/2024

9:24:34 AM

1,974.50

5

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

47

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

39

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

9

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

9

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

9

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

9

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

2

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

2

CEUX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

5

TQEX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

5

TQEX

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

8

AQEU

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

10

XCSE

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

10

XCSE

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

10

XCSE

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

10

XCSE

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

1

XCSE

GENMAB A/S

19/04/2024

9:25:35 AM

1,974.50

26

XCSE

GENMAB A/S

19/04/2024

9:25:35 AM

1,972.50

44

XCSE

GENMAB A/S

19/04/2024

9:25:35 AM

1,972.50

6

AQEU

GENMAB A/S

19/04/2024

9:25:35 AM

1,972.50

8

AQEU

GENMAB A/S

19/04/2024

9:25:35 AM

1,972.50

6

TQEX

GENMAB A/S

19/04/2024

9:25:35 AM

1,972.50

8

AQEU

GENMAB A/S

19/04/2024

9:25:35 AM

1,972.50

23

XCSE

GENMAB A/S

19/04/2024

9:25:36 AM

1,972.00

46

CEUX

GENMAB A/S

19/04/2024

9:25:36 AM

1,972.00

4

CEUX

133


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:25:36 AM

1,972.00

41

CEUX

GENMAB A/S

19/04/2024

9:28:49 AM

1,971.00

29

XCSE

GENMAB A/S

19/04/2024

9:28:49 AM

1,971.00

78

XCSE

GENMAB A/S

19/04/2024

9:30:34 AM

1,968.50

6

AQEU

GENMAB A/S

19/04/2024

9:30:34 AM

1,968.50

40

CEUX

GENMAB A/S

19/04/2024

9:30:34 AM

1,968.50

6

TQEX

GENMAB A/S

19/04/2024

9:30:34 AM

1,968.50

9

XCSE

GENMAB A/S

19/04/2024

9:30:34 AM

1,968.50

32

XCSE

GENMAB A/S

19/04/2024

9:30:34 AM

1,968.50

3

XCSE

GENMAB A/S

19/04/2024

9:32:02 AM

1,966.00

75

CEUX

GENMAB A/S

19/04/2024

9:32:02 AM

1,966.00

19

CEUX

GENMAB A/S

19/04/2024

9:34:25 AM

1,969.50

94

XCSE

GENMAB A/S

19/04/2024

9:34:25 AM

1,969.50

12

AQEU

GENMAB A/S

19/04/2024

9:34:25 AM

1,969.50

40

CEUX

GENMAB A/S

19/04/2024

9:34:25 AM

1,969.50

44

CEUX

GENMAB A/S

19/04/2024

9:34:25 AM

1,969.50

13

TQEX

GENMAB A/S

19/04/2024

9:36:13 AM

1,966.00

75

CEUX

GENMAB A/S

19/04/2024

9:36:13 AM

1,966.00

8

CEUX

GENMAB A/S

19/04/2024

9:36:13 AM

1,966.00

4

CEUX

GENMAB A/S

19/04/2024

9:36:13 AM

1,966.00

6

CEUX

GENMAB A/S

19/04/2024

9:36:15 AM

1,964.50

16

XCSE

GENMAB A/S

19/04/2024

9:36:15 AM

1,964.50

28

XCSE

GENMAB A/S

19/04/2024

9:39:02 AM

1,969.00

8

XCSE

GENMAB A/S

19/04/2024

9:39:02 AM

1,969.00

8

XCSE

GENMAB A/S

19/04/2024

9:39:02 AM

1,969.00

8

XCSE

GENMAB A/S

19/04/2024

9:39:02 AM

1,969.00

9

CEUX

GENMAB A/S

19/04/2024

9:39:02 AM

1,969.00

9

CEUX

GENMAB A/S

19/04/2024

9:39:02 AM

1,969.00

5

TQEX

GENMAB A/S

19/04/2024

9:39:02 AM

1,969.00

5

TQEX

GENMAB A/S

19/04/2024

9:39:44 AM

1,969.00

8

XCSE

GENMAB A/S

19/04/2024

9:39:44 AM

1,969.00

8

XCSE

GENMAB A/S

19/04/2024

9:39:44 AM

1,969.00

9

CEUX

GENMAB A/S

19/04/2024

9:39:44 AM

1,969.00

5

TQEX

GENMAB A/S

19/04/2024

9:40:29 AM

1,969.50

21

CEUX

GENMAB A/S

19/04/2024

9:40:29 AM

1,969.50

21

XCSE

GENMAB A/S

19/04/2024

9:40:29 AM

1,969.50

24

XCSE

GENMAB A/S

19/04/2024

9:40:29 AM

1,969.50

55

XCSE

GENMAB A/S

19/04/2024

9:40:29 AM

1,969.50

69

CEUX

GENMAB A/S

19/04/2024

9:40:29 AM

1,969.50

14

TQEX

134


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:40:30 AM

1,969.50

13

XCSE

GENMAB A/S

19/04/2024

9:42:35 AM

1,969.50

48

CEUX

GENMAB A/S

19/04/2024

9:42:35 AM

1,969.50

63

XCSE

GENMAB A/S

19/04/2024

9:42:36 AM

1,969.50

3

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,971.00

25

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,971.00

121

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,970.00

8

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,970.00

40

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,970.00

40

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,970.00

8

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,970.00

52

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,969.50

23

XCSE

GENMAB A/S

19/04/2024

9:43:38 AM

1,969.50

20

XCSE

GENMAB A/S

19/04/2024

9:48:50 AM

1,966.00

4

XCSE

GENMAB A/S

19/04/2024

9:50:00 AM

1,971.50

35

XCSE

GENMAB A/S

19/04/2024

9:50:01 AM

1,970.50

19

XCSE

GENMAB A/S

19/04/2024

9:50:02 AM

1,970.50

15

CEUX

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

4

XCSE

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

84

XCSE

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

3

XCSE

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

71

CEUX

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

12

TQEX

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

24

XCSE

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

7

XCSE

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

9

XCSE

GENMAB A/S

19/04/2024

9:50:49 AM

1,970.00

8

XCSE

GENMAB A/S

19/04/2024

9:53:20 AM

1,973.00

24

AQEU

GENMAB A/S

19/04/2024

9:53:20 AM

1,973.00

74

CEUX

GENMAB A/S

19/04/2024

9:53:20 AM

1,973.00

75

CEUX

GENMAB A/S

19/04/2024

9:53:20 AM

1,973.00

17

CEUX

GENMAB A/S

19/04/2024

9:54:24 AM

1,971.00

8

AQEU

GENMAB A/S

19/04/2024

9:54:24 AM

1,971.00

8

TQEX

GENMAB A/S

19/04/2024

9:54:24 AM

1,971.00

16

XCSE

GENMAB A/S

19/04/2024

9:54:24 AM

1,971.00

25

CEUX

GENMAB A/S

19/04/2024

9:54:26 AM

1,971.00

26

CEUX

GENMAB A/S

19/04/2024

9:54:26 AM

1,971.00

41

XCSE

GENMAB A/S

19/04/2024

9:55:25 AM

1,967.50

17

XCSE

GENMAB A/S

19/04/2024

9:55:25 AM

1,967.50

39

XCSE

GENMAB A/S

19/04/2024

9:55:25 AM

1,967.50

8

AQEU

135


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

9:55:25 AM

1,967.50

7

TQEX

GENMAB A/S

19/04/2024

9:55:25 AM

1,967.50

51

CEUX

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

95

XCSE

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

6

XCSE

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

6

XCSE

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

6

XCSE

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

6

XCSE

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

75

XCSE

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

8

XCSE

GENMAB A/S

19/04/2024

9:59:43 AM

1,969.50

21

XCSE

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

19

XCSE

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

19

CEUX

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

5

TQEX

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

19

CEUX

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

5

TQEX

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

16

CEUX

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

19

XCSE

GENMAB A/S

19/04/2024

10:02:42 AM

1,967.50

1

XCSE

GENMAB A/S

19/04/2024

10:02:43 AM

1,967.50

5

TQEX

GENMAB A/S

19/04/2024

10:03:26 AM

1,970.50

61

XCSE

GENMAB A/S

19/04/2024

10:03:26 AM

1,970.50

2

CEUX

GENMAB A/S

19/04/2024

10:03:26 AM

1,970.50

10

CEUX

GENMAB A/S

19/04/2024

10:03:26 AM

1,970.50

4

TQEX

GENMAB A/S

19/04/2024

10:03:26 AM

1,970.50

42

CEUX

GENMAB A/S

19/04/2024

10:03:26 AM

1,970.50

13

CEUX

GENMAB A/S

19/04/2024

10:05:11 AM

1,968.50

22

XCSE

GENMAB A/S

19/04/2024

10:05:13 AM

1,968.50

22

XCSE

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

1

AQEU

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

10

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

10

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

7

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

10

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

7

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

6

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

5

TQEX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

5

TQEX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

2

TQEX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

10

XCSE

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

5

XCSE

136


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

5

XCSE

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

5

XCSE

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

1

AQEU

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

4

AQEU

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

4

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

10

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

7

CEUX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

3

TQEX

GENMAB A/S

19/04/2024

10:06:15 AM

1,970.00

2

TQEX

GENMAB A/S

19/04/2024

10:07:25 AM

1,970.00

12

XCSE

GENMAB A/S

19/04/2024

10:07:25 AM

1,970.00

9

XCSE

GENMAB A/S

19/04/2024

10:07:25 AM

1,970.00

12

XCSE

GENMAB A/S

19/04/2024

10:09:06 AM

1,970.50

17

XCSE

GENMAB A/S

19/04/2024

10:09:06 AM

1,970.50

5

XCSE

GENMAB A/S

19/04/2024

10:09:06 AM

1,970.50

17

XCSE

GENMAB A/S

19/04/2024

10:09:06 AM

1,970.50

2

XCSE

GENMAB A/S

19/04/2024

10:09:45 AM

1,972.00

36

XCSE

GENMAB A/S

19/04/2024

10:10:14 AM

1,972.00

39

XCSE

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

24

XCSE

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

24

XCSE

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

23

CEUX

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

22

CEUX

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

1

CEUX

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

18

CEUX

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

23

CEUX

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

5

CEUX

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

24

XCSE

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

7

XCSE

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

10

XCSE

GENMAB A/S

19/04/2024

10:10:28 AM

1,971.50

7

XCSE

GENMAB A/S

19/04/2024

10:12:40 AM

1,970.50

11

AQEU

GENMAB A/S

19/04/2024

10:12:40 AM

1,970.50

46

CEUX

GENMAB A/S

19/04/2024

10:12:40 AM

1,970.50

30

CEUX

GENMAB A/S

19/04/2024

10:12:40 AM

1,970.50

12

TQEX

GENMAB A/S

19/04/2024

10:12:40 AM

1,970.50

52

XCSE

GENMAB A/S

19/04/2024

10:12:40 AM

1,970.50

23

XCSE

GENMAB A/S

19/04/2024

10:12:40 AM

1,970.50

84

XCSE

GENMAB A/S

19/04/2024

10:17:19 AM

1,970.00

2

AQEU

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

44

XCSE

137


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

6

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

6

AQEU

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

6

AQEU

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

8

AQEU

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

34

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

34

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

6

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

21

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

31

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

1

TQEX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

5

TQEX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

1

TQEX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

9

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

36

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

6

TQEX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

5

CEUX

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

29

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

7

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

8

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

7

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

8

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

24

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

5

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

10

XCSE

GENMAB A/S

19/04/2024

10:20:19 AM

1,973.00

9

CEUX

GENMAB A/S

19/04/2024

10:20:31 AM

1,972.50

39

XCSE

GENMAB A/S

19/04/2024

10:20:31 AM

1,972.50

10

XCSE

GENMAB A/S

19/04/2024

10:20:31 AM

1,972.50

29

XCSE

GENMAB A/S

19/04/2024

10:20:31 AM

1,972.50

18

XCSE

GENMAB A/S

19/04/2024

10:20:31 AM

1,972.50

35

XCSE

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

2

AQEU

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

8

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

8

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

1

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

7

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

1

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

7

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

5

TQEX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

1

XCSE

138


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

7

XCSE

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

1

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

7

CEUX

GENMAB A/S

19/04/2024

10:23:05 AM

1,970.50

5

TQEX

GENMAB A/S

19/04/2024

10:23:11 AM

1,970.50

23

XCSE

GENMAB A/S

19/04/2024

10:23:11 AM

1,970.50

23

XCSE

GENMAB A/S

19/04/2024

10:23:11 AM

1,970.50

20

XCSE

GENMAB A/S

19/04/2024

10:25:14 AM

1,970.50

25

XCSE

GENMAB A/S

19/04/2024

10:25:14 AM

1,970.50

25

XCSE

GENMAB A/S

19/04/2024

10:25:14 AM

1,970.50

61

XCSE

GENMAB A/S

19/04/2024

10:25:15 AM

1,970.50

25

XCSE

GENMAB A/S

19/04/2024

10:27:17 AM

1,970.50

41

CEUX

GENMAB A/S

19/04/2024

10:27:17 AM

1,970.50

11

XCSE

GENMAB A/S

19/04/2024

10:29:40 AM

1,970.50

8

AQEU

GENMAB A/S

19/04/2024

10:29:40 AM

1,970.50

22

CEUX

GENMAB A/S

19/04/2024

10:29:40 AM

1,970.50

3

CEUX

GENMAB A/S

19/04/2024

10:29:40 AM

1,970.50

8

TQEX

GENMAB A/S

19/04/2024

10:30:14 AM

1,970.50

32

AQEU

GENMAB A/S

19/04/2024

10:30:14 AM

1,970.50

2

TQEX

GENMAB A/S

19/04/2024

10:30:19 AM

1,969.50

6

AQEU

GENMAB A/S

19/04/2024

10:30:19 AM

1,969.50

40

CEUX

GENMAB A/S

19/04/2024

10:30:19 AM

1,969.50

6

CEUX

GENMAB A/S

19/04/2024

10:30:19 AM

1,969.50

4

CEUX

GENMAB A/S

19/04/2024

10:30:19 AM

1,969.50

13

XCSE

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

22

XCSE

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

13

XCSE

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

67

XCSE

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

25

XCSE

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

21

CEUX

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

19

CEUX

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

52

CEUX

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

21

CEUX

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

2

CEUX

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

5

TQEX

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

3

AQEU

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

10

AQEU

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

1

CEUX

GENMAB A/S

19/04/2024

10:31:03 AM

1,968.50

3

AQEU

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

12

TQEX

139


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

49

XCSE

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

2

XCSE

GENMAB A/S

19/04/2024

10:31:03 AM

1,969.00

23

XCSE

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

22

XCSE

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

20

CEUX

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

22

XCSE

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

3

AQEU

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

20

CEUX

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

4

CEUX

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

5

TQEX

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

8

TQEX

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.00

9

XCSE

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

2

XCSE

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

8

AQEU

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

8

AQEU

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

42

AQEU

GENMAB A/S

19/04/2024

10:31:04 AM

1,968.50

5

AQEU

GENMAB A/S

19/04/2024

10:37:11 AM

1,962.00

51

XCSE

GENMAB A/S

19/04/2024

10:39:37 AM

1,965.00

26

CEUX

GENMAB A/S

19/04/2024

10:39:37 AM

1,965.00

30

CEUX

GENMAB A/S

19/04/2024

10:39:37 AM

1,965.00

71

CEUX

GENMAB A/S

19/04/2024

10:39:37 AM

1,965.00

26

CEUX

GENMAB A/S

19/04/2024

10:39:37 AM

1,965.00

26

CEUX

GENMAB A/S

19/04/2024

10:39:37 AM

1,965.00

1

CEUX

GENMAB A/S

19/04/2024

10:39:37 AM

1,965.00

16

TQEX

GENMAB A/S

19/04/2024

10:42:37 AM

1,961.00

64

XCSE

GENMAB A/S

19/04/2024

10:42:37 AM

1,961.00

21

CEUX

GENMAB A/S

19/04/2024

10:42:37 AM

1,961.00

3

TQEX

GENMAB A/S

19/04/2024

10:42:37 AM

1,961.00

1

CEUX

GENMAB A/S

19/04/2024

10:42:37 AM

1,961.00

7

CEUX

GENMAB A/S

19/04/2024

10:42:37 AM

1,961.00

29

CEUX

GENMAB A/S

19/04/2024

10:42:37 AM

1,961.00

14

CEUX

GENMAB A/S

19/04/2024

10:44:50 AM

1,960.50

9

XCSE

GENMAB A/S

19/04/2024

10:46:09 AM

1,962.00

8

AQEU

GENMAB A/S

19/04/2024

10:46:09 AM

1,962.00

32

AQEU

GENMAB A/S

19/04/2024

10:46:09 AM

1,962.00

1

CEUX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

44

CEUX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

14

CEUX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

13

CEUX

140


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

14

CEUX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

4

AQEU

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

7

AQEU

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

27

CEUX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

2

TQEX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

3

TQEX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

6

TQEX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

10

TQEX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

31

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

11

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

37

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

31

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

6

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

13

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

18

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

13

XCSE

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

27

CEUX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

27

CEUX

GENMAB A/S

19/04/2024

10:48:26 AM

1,964.50

15

CEUX

GENMAB A/S

19/04/2024

10:48:27 AM

1,964.50

31

XCSE

GENMAB A/S

19/04/2024

10:48:27 AM

1,964.50

8

CEUX

GENMAB A/S

19/04/2024

10:48:27 AM

1,964.50

7

CEUX

GENMAB A/S

19/04/2024

10:48:27 AM

1,964.50

17

XCSE

GENMAB A/S

19/04/2024

10:48:27 AM

1,964.50

8

AQEU

GENMAB A/S

19/04/2024

10:48:27 AM

1,964.50

36

CEUX

GENMAB A/S

19/04/2024

10:48:27 AM

1,964.50

12

XCSE

GENMAB A/S

19/04/2024

10:53:05 AM

1,964.50

6

XCSE

GENMAB A/S

19/04/2024

10:53:05 AM

1,964.50

16

XCSE

GENMAB A/S

19/04/2024

10:55:08 AM

1,967.50

30

XCSE

GENMAB A/S

19/04/2024

10:55:08 AM

1,967.50

11

XCSE

GENMAB A/S

19/04/2024

10:55:51 AM

1,967.50

3

XCSE

GENMAB A/S

19/04/2024

10:56:10 AM

1,968.00

22

XCSE

GENMAB A/S

19/04/2024

10:56:10 AM

1,968.00

22

XCSE

GENMAB A/S

19/04/2024

10:56:10 AM

1,968.00

22

XCSE

GENMAB A/S

19/04/2024

10:56:10 AM

1,968.00

22

XCSE

GENMAB A/S

19/04/2024

10:56:10 AM

1,968.00

66

XCSE

GENMAB A/S

19/04/2024

10:56:10 AM

1,968.00

22

XCSE

GENMAB A/S

19/04/2024

10:56:10 AM

1,968.00

21

XCSE

GENMAB A/S

19/04/2024

10:56:11 AM

1,968.00

1

XCSE

141


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

10:56:11 AM

1,968.00

21

XCSE

GENMAB A/S

19/04/2024

10:56:11 AM

1,968.00

22

XCSE

GENMAB A/S

19/04/2024

10:56:11 AM

1,968.00

12

XCSE

GENMAB A/S

19/04/2024

10:56:11 AM

1,968.00

10

XCSE

GENMAB A/S

19/04/2024

10:56:11 AM

1,968.00

4

XCSE

GENMAB A/S

19/04/2024

10:56:11 AM

1,968.00

4

XCSE

GENMAB A/S

19/04/2024

11:00:44 AM

1,966.50

8

AQEU

GENMAB A/S

19/04/2024

11:00:44 AM

1,966.50

26

AQEU

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

8

CEUX

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

5

TQEX

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

8

XCSE

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

22

XCSE

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

8

CEUX

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

8

CEUX

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

5

TQEX

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

1

TQEX

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

5

TQEX

GENMAB A/S

19/04/2024

11:02:32 AM

1,968.50

1

TQEX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

35

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

12

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

15

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

11

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

24

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

27

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

5

AQEU

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

5

AQEU

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

5

AQEU

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

22

CEUX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

32

CEUX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

32

CEUX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

22

CEUX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

32

CEUX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

5

TQEX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

5

TQEX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

5

TQEX

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

35

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

27

XCSE

GENMAB A/S

19/04/2024

11:03:43 AM

1,968.50

28

XCSE

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

18

CEUX

142


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

14

CEUX

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

16

CEUX

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

22

CEUX

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

35

XCSE

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

27

XCSE

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

8

AQEU

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

64

CEUX

GENMAB A/S

19/04/2024

11:03:44 AM

1,968.50

15

XCSE

GENMAB A/S

19/04/2024

11:10:41 AM

1,965.00

50

XCSE

GENMAB A/S

19/04/2024

11:10:41 AM

1,965.00

7

XCSE

GENMAB A/S

19/04/2024

11:10:41 AM

1,965.00

8

AQEU

GENMAB A/S

19/04/2024

11:10:41 AM

1,965.00

52

CEUX

GENMAB A/S

19/04/2024

11:10:41 AM

1,965.00

8

TQEX

GENMAB A/S

19/04/2024

11:12:53 AM

1,965.00

26

XCSE

GENMAB A/S

19/04/2024

11:12:53 AM

1,965.00

26

XCSE

GENMAB A/S

19/04/2024

11:12:53 AM

1,965.00

1

XCSE

GENMAB A/S

19/04/2024

11:12:53 AM

1,965.00

26

XCSE

GENMAB A/S

19/04/2024

11:12:53 AM

1,965.00

26

XCSE

GENMAB A/S

19/04/2024

11:12:53 AM

1,965.00

1

XCSE

GENMAB A/S

19/04/2024

11:12:53 AM

1,965.00

10

TQEX

GENMAB A/S

19/04/2024

11:14:18 AM

1,964.50

39

XCSE

GENMAB A/S

19/04/2024

11:14:18 AM

1,964.50

15

XCSE

GENMAB A/S

19/04/2024

11:14:18 AM

1,964.50

7

AQEU

GENMAB A/S

19/04/2024

11:14:18 AM

1,964.50

48

CEUX

GENMAB A/S

19/04/2024

11:14:18 AM

1,964.50

8

TQEX

GENMAB A/S

19/04/2024

11:18:54 AM

1,963.50

8

AQEU

GENMAB A/S

19/04/2024

11:18:54 AM

1,963.50

30

AQEU

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

39

CEUX

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

2

CEUX

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

35

CEUX

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

14

CEUX

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

42

XCSE

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

23

CEUX

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

34

CEUX

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

85

XCSE

GENMAB A/S

19/04/2024

11:19:41 AM

1,963.50

31

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

34

XCSE

143


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

38

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

1

AQEU

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

7

AQEU

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

1

AQEU

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

31

AQEU

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

9

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

3

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

5

TQEX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

5

TQEX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

TQEX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

6

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

6

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

3

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

3

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

3

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

3

CEUX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

5

TQEX

GENMAB A/S

19/04/2024

11:25:57 AM

1,967.50

8

XCSE

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

12

XCSE

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

11

XCSE

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

11

XCSE

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

11

XCSE

144


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

1

XCSE

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

24

XCSE

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

23

XCSE

GENMAB A/S

19/04/2024

11:25:59 AM

1,967.50

7

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.50

75

XCSE

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.50

46

XCSE

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.50

16

AQEU

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.50

88

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.50

21

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.50

12

TQEX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.50

4

TQEX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

5

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

5

TQEX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

13

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

5

XCSE

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

11

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

5

TQEX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

7

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

4

CEUX

GENMAB A/S

19/04/2024

11:33:11 AM

1,968.00

5

TQEX

GENMAB A/S

19/04/2024

11:33:26 AM

1,966.50

66

CEUX

GENMAB A/S

19/04/2024

11:33:26 AM

1,966.50

52

XCSE

GENMAB A/S

19/04/2024

11:33:26 AM

1,966.50

66

XCSE

GENMAB A/S

19/04/2024

11:42:57 AM

1,971.50

24

XCSE

GENMAB A/S

19/04/2024

11:42:57 AM

1,971.50

1

XCSE

GENMAB A/S

19/04/2024

11:42:57 AM

1,971.50

16

XCSE

GENMAB A/S

19/04/2024

11:42:58 AM

1,971.00

59

XCSE

GENMAB A/S

19/04/2024

11:42:58 AM

1,971.00

8

AQEU

GENMAB A/S

19/04/2024

11:42:58 AM

1,971.00

54

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

4

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

7

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

7

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

1

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

47

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

4

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

3

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

38

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

7

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

75

CEUX

145


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

3

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

8

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

28

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

2

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

14

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

5

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

5

TQEX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

7

XCSE

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

1

AQEU

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

3

CEUX

GENMAB A/S

19/04/2024

11:47:22 AM

1,972.50

4

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,969.50

20

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

6

AQEU

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

34

AQEU

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

17

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

18

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

4

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

39

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

39

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

26

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

6

TQEX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

8

TQEX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

6

TQEX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

6

TQEX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

43

XCSE

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

115

XCSE

GENMAB A/S

19/04/2024

11:49:00 AM

1,969.00

27

XCSE

GENMAB A/S

19/04/2024

11:49:00 AM

1,969.50

46

CEUX

GENMAB A/S

19/04/2024

11:49:00 AM

1,970.00

16

TQEX

GENMAB A/S

19/04/2024

11:49:00 AM

1,969.00

14

XCSE

GENMAB A/S

19/04/2024

11:55:30 AM

1,974.00

26

XCSE

GENMAB A/S

19/04/2024

11:55:30 AM

1,974.00

26

XCSE

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

10

XCSE

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

50

XCSE

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

11

CEUX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

11

CEUX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

6

CEUX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

5

CEUX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

1

CEUX

146


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

5

CEUX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

5

TQEX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

5

TQEX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

6

TQEX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

5

TQEX

GENMAB A/S

19/04/2024

11:56:01 AM

1,975.00

34

XCSE

GENMAB A/S

19/04/2024

11:56:02 AM

1,975.00

4

CEUX

GENMAB A/S

19/04/2024

11:57:15 AM

1,975.00

23

XCSE

GENMAB A/S

19/04/2024

11:57:15 AM

1,975.00

23

XCSE

GENMAB A/S

19/04/2024

11:57:52 AM

1,976.00

52

XCSE

GENMAB A/S

19/04/2024

11:57:52 AM

1,976.00

4

XCSE

GENMAB A/S

19/04/2024

11:57:52 AM

1,976.00

47

CEUX

GENMAB A/S

19/04/2024

11:57:52 AM

1,976.00

5

XCSE

GENMAB A/S

19/04/2024

11:58:47 AM

1,975.00

10

CEUX

GENMAB A/S

19/04/2024

11:58:47 AM

1,975.00

5

TQEX

GENMAB A/S

19/04/2024

11:58:47 AM

1,975.00

9

XCSE

GENMAB A/S

19/04/2024

11:59:15 AM

1,974.50

1

AQEU

GENMAB A/S

19/04/2024

11:59:15 AM

1,974.50

8

CEUX

GENMAB A/S

19/04/2024

11:59:15 AM

1,974.50

5

TQEX

GENMAB A/S

19/04/2024

11:59:15 AM

1,974.50

5

TQEX

GENMAB A/S

19/04/2024

11:59:15 AM

1,974.50

5

XCSE

GENMAB A/S

19/04/2024

11:59:15 AM

1,974.50

2

XCSE

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

10

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

10

XCSE

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

10

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

10

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

10

XCSE

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

10

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

9

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

36

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

25

XCSE

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

8

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

4

CEUX

GENMAB A/S

19/04/2024

11:59:49 AM

1,974.50

42

XCSE

GENMAB A/S

19/04/2024

12:01:30 PM

1,972.50

1

XCSE

GENMAB A/S

19/04/2024

12:01:51 PM

1,973.00

15

CEUX

GENMAB A/S

19/04/2024

12:03:02 PM

1,974.00

41

CEUX

GENMAB A/S

19/04/2024

12:03:02 PM

1,974.00

41

CEUX

GENMAB A/S

19/04/2024

12:03:02 PM

1,974.00

6

CEUX

147


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

12:03:02 PM

1,974.00

7

TQEX

GENMAB A/S

19/04/2024

12:03:02 PM

1,974.00

46

XCSE

GENMAB A/S

19/04/2024

12:03:02 PM

1,973.50

15

XCSE

GENMAB A/S

19/04/2024

12:03:02 PM

1,973.50

14

XCSE

GENMAB A/S

19/04/2024

12:04:05 PM

1,974.50

7

XCSE

GENMAB A/S

19/04/2024

12:04:14 PM

1,974.00

15

XCSE

GENMAB A/S

19/04/2024

12:04:52 PM

1,974.00

1

AQEU

GENMAB A/S

19/04/2024

12:04:52 PM

1,974.00

9

CEUX

GENMAB A/S

19/04/2024

12:04:52 PM

1,974.00

5

TQEX

GENMAB A/S

19/04/2024

12:04:52 PM

1,974.00

9

XCSE

GENMAB A/S

19/04/2024

12:06:03 PM

1,976.00

3

XCSE

GENMAB A/S

19/04/2024

12:06:03 PM

1,976.00

23

XCSE

GENMAB A/S

19/04/2024

12:06:03 PM

1,976.00

15

XCSE

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

45

CEUX

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

45

CEUX

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

17

CEUX

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

49

XCSE

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

9

XCSE

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

40

XCSE

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

9

XCSE

GENMAB A/S

19/04/2024

12:06:41 PM

1,976.00

12

XCSE

GENMAB A/S

19/04/2024

12:08:36 PM

1,976.00

8

CEUX

GENMAB A/S

19/04/2024

12:10:34 PM

1,976.50

34

TQEX

GENMAB A/S

19/04/2024

12:11:16 PM

1,976.50

8

AQEU

GENMAB A/S

19/04/2024

12:11:16 PM

1,976.50

8

TQEX

GENMAB A/S

19/04/2024

12:11:16 PM

1,976.50

8

AQEU

GENMAB A/S

19/04/2024

12:11:43 PM

1,976.50

31

CEUX

GENMAB A/S

19/04/2024

12:11:43 PM

1,976.50

1

CEUX

GENMAB A/S

19/04/2024

12:11:43 PM

1,976.50

8

TQEX

GENMAB A/S

19/04/2024

12:12:03 PM

1,976.00

17

XCSE

GENMAB A/S

19/04/2024

12:12:03 PM

1,976.00

2

XCSE

GENMAB A/S

19/04/2024

12:12:03 PM

1,976.00

25

XCSE

GENMAB A/S

19/04/2024

12:13:03 PM

1,975.50

23

XCSE

GENMAB A/S

19/04/2024

12:13:03 PM

1,975.50

1

XCSE

GENMAB A/S

19/04/2024

12:13:46 PM

1,976.50

5

TQEX

GENMAB A/S

19/04/2024

12:13:46 PM

1,976.50

17

XCSE

GENMAB A/S

19/04/2024

12:15:05 PM

1,976.50

23

XCSE

GENMAB A/S

19/04/2024

12:15:05 PM

1,976.50

16

XCSE

GENMAB A/S

19/04/2024

12:15:08 PM

1,976.00

38

TQEX

148


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

12:17:05 PM

1,977.00

28

CEUX

GENMAB A/S

19/04/2024

12:18:32 PM

1,977.00

7

CEUX

GENMAB A/S

19/04/2024

12:18:32 PM

1,977.00

12

CEUX

GENMAB A/S

19/04/2024

12:18:32 PM

1,977.00

6

CEUX

GENMAB A/S

19/04/2024

12:18:32 PM

1,977.00

25

CEUX

GENMAB A/S

19/04/2024

12:18:32 PM

1,977.00

10

XCSE

GENMAB A/S

19/04/2024

12:18:41 PM

1,977.00

36

XCSE

GENMAB A/S

19/04/2024

12:19:19 PM

1,977.00

39

CEUX

GENMAB A/S

19/04/2024

12:19:50 PM

1,976.00

19

CEUX

GENMAB A/S

19/04/2024

12:19:50 PM

1,976.00

52

CEUX

GENMAB A/S

19/04/2024

12:19:50 PM

1,976.00

4

CEUX

GENMAB A/S

19/04/2024

12:19:50 PM

1,976.00

12

TQEX

GENMAB A/S

19/04/2024

12:19:53 PM

1,976.00

20

XCSE

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.50

22

XCSE

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.50

58

XCSE

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.50

35

XCSE

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.50

10

AQEU

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.50

71

CEUX

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.50

12

TQEX

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.00

3

CEUX

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.00

12

CEUX

GENMAB A/S

19/04/2024

12:23:03 PM

1,976.00

20

CEUX

GENMAB A/S

19/04/2024

12:27:27 PM

1,976.50

8

AQEU

GENMAB A/S

19/04/2024

12:27:37 PM

1,976.50

8

AQEU

GENMAB A/S

19/04/2024

12:27:37 PM

1,976.50

8

AQEU

GENMAB A/S

19/04/2024

12:27:38 PM

1,975.50

10

CEUX

GENMAB A/S

19/04/2024

12:27:38 PM

1,975.50

10

XCSE

GENMAB A/S

19/04/2024

12:27:43 PM

1,975.50

1

AQEU

GENMAB A/S

19/04/2024

12:27:43 PM

1,975.50

10

CEUX

GENMAB A/S

19/04/2024

12:27:43 PM

1,975.50

5

TQEX

GENMAB A/S

19/04/2024

12:27:43 PM

1,975.50

5

TQEX

GENMAB A/S

19/04/2024

12:27:43 PM

1,975.50

10

XCSE

GENMAB A/S

19/04/2024

12:27:43 PM

1,975.50

10

XCSE

GENMAB A/S

19/04/2024

12:29:29 PM

1,977.00

7

XCSE

GENMAB A/S

19/04/2024

12:30:02 PM

1,977.00

4

XCSE

GENMAB A/S

19/04/2024

12:31:46 PM

1,978.50

23

XCSE

GENMAB A/S

19/04/2024

12:31:46 PM

1,978.50

21

CEUX

GENMAB A/S

19/04/2024

12:31:46 PM

1,978.50

21

CEUX

GENMAB A/S

19/04/2024

12:31:46 PM

1,978.50

6

CEUX

149


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

12:31:46 PM

1,978.50

2

CEUX

GENMAB A/S

19/04/2024

12:31:46 PM

1,978.50

32

XCSE

GENMAB A/S

19/04/2024

12:32:11 PM

1,978.50

41

XCSE

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

6

AQEU

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

6

AQEU

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

24

CEUX

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

19

CEUX

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

42

CEUX

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

7

TQEX

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

7

TQEX

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

48

XCSE

GENMAB A/S

19/04/2024

12:32:25 PM

1,977.50

47

XCSE

GENMAB A/S

19/04/2024

12:39:25 PM

1,978.00

1

AQEU

GENMAB A/S

19/04/2024

12:40:45 PM

1,979.50

36

CEUX

GENMAB A/S

19/04/2024

12:40:45 PM

1,979.50

7

XCSE

GENMAB A/S

19/04/2024

12:40:45 PM

1,979.50

25

XCSE

GENMAB A/S

19/04/2024

12:40:45 PM

1,979.50

34

XCSE

GENMAB A/S

19/04/2024

12:40:46 PM

1,979.50

23

XCSE

GENMAB A/S

19/04/2024

12:41:29 PM

1,979.50

51

XCSE

GENMAB A/S

19/04/2024

12:41:29 PM

1,979.50

49

XCSE

GENMAB A/S

19/04/2024

12:42:13 PM

1,979.50

37

XCSE

GENMAB A/S

19/04/2024

12:42:54 PM

1,980.00

40

XCSE

GENMAB A/S

19/04/2024

12:44:00 PM

1,980.00

25

XCSE

GENMAB A/S

19/04/2024

12:44:00 PM

1,980.00

4

XCSE

GENMAB A/S

19/04/2024

12:44:00 PM

1,980.00

7

XCSE

GENMAB A/S

19/04/2024

12:44:26 PM

1,980.00

36

XCSE

GENMAB A/S

19/04/2024

12:45:23 PM

1,980.00

2

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

1

AQEU

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

22

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

22

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

12

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

12

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

2

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

TQEX

150


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

5

TQEX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

5

TQEX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

TQEX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

5

TQEX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

5

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

3

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

3

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

3

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

5

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

5

TQEX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

6

TQEX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

4

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

34

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

22

XCSE

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

AQEU

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

10

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

22

CEUX

GENMAB A/S

19/04/2024

12:46:36 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

12:50:04 PM

1,980.00

65

CEUX

GENMAB A/S

19/04/2024

12:50:04 PM

1,980.00

10

CEUX

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.50

71

CEUX

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.50

7

CEUX

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.50

24

TQEX

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.50

56

TQEX

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.00

35

XCSE

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.00

1

XCSE

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.00

7

AQEU

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.00

36

CEUX

151


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

12:50:04 PM

1,979.00

1

CEUX

GENMAB A/S

19/04/2024

1:00:14 PM

1,980.50

18

TQEX

GENMAB A/S

19/04/2024

1:00:14 PM

1,980.50

37

XCSE

GENMAB A/S

19/04/2024

1:00:14 PM

1,980.50

72

XCSE

GENMAB A/S

19/04/2024

1:00:14 PM

1,980.50

10

XCSE

GENMAB A/S

19/04/2024

1:00:16 PM

1,980.50

19

XCSE

GENMAB A/S

19/04/2024

1:00:16 PM

1,980.50

22

XCSE

GENMAB A/S

19/04/2024

1:00:16 PM

1,980.50

7

XCSE

GENMAB A/S

19/04/2024

1:01:42 PM

1,982.00

11

XCSE

GENMAB A/S

19/04/2024

1:02:48 PM

1,982.00

5

XCSE

GENMAB A/S

19/04/2024

1:02:48 PM

1,982.00

7

XCSE

GENMAB A/S

19/04/2024

1:02:48 PM

1,982.00

15

XCSE

GENMAB A/S

19/04/2024

1:02:48 PM

1,982.00

82

XCSE

GENMAB A/S

19/04/2024

1:02:48 PM

1,982.00

2

AQEU

GENMAB A/S

19/04/2024

1:02:48 PM

1,982.00

9

AQEU

GENMAB A/S

19/04/2024

1:02:48 PM

1,982.00

74

CEUX

GENMAB A/S

19/04/2024

1:02:48 PM

1,981.00

20

CEUX

GENMAB A/S

19/04/2024

1:02:48 PM

1,981.00

6

CEUX

GENMAB A/S

19/04/2024

1:02:48 PM

1,981.00

5

TQEX

GENMAB A/S

19/04/2024

1:02:48 PM

1,981.00

22

XCSE

GENMAB A/S

19/04/2024

1:02:48 PM

1,981.00

14

CEUX

GENMAB A/S

19/04/2024

1:02:48 PM

1,981.00

5

TQEX

GENMAB A/S

19/04/2024

1:02:48 PM

1,981.00

19

CEUX

GENMAB A/S

19/04/2024

1:02:57 PM

1,981.00

26

XCSE

GENMAB A/S

19/04/2024

1:09:05 PM

1,979.00

10

CEUX

GENMAB A/S

19/04/2024

1:09:05 PM

1,979.00

5

TQEX

GENMAB A/S

19/04/2024

1:09:05 PM

1,979.00

9

XCSE

GENMAB A/S

19/04/2024

1:09:05 PM

1,979.00

10

CEUX

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

1

AQEU

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

3

AQEU

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

10

CEUX

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

3

CEUX

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

5

TQEX

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

3

TQEX

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

9

XCSE

GENMAB A/S

19/04/2024

1:09:06 PM

1,979.00

6

XCSE

GENMAB A/S

19/04/2024

1:09:48 PM

1,979.00

5

XCSE

GENMAB A/S

19/04/2024

1:12:14 PM

1,980.50

19

CEUX

GENMAB A/S

19/04/2024

1:12:14 PM

1,980.50

15

CEUX

152


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

1:12:55 PM

1,980.50

8

CEUX

GENMAB A/S

19/04/2024

1:13:00 PM

1,980.00

18

CEUX

GENMAB A/S

19/04/2024

1:13:00 PM

1,980.00

1

CEUX

GENMAB A/S

19/04/2024

1:13:00 PM

1,980.00

19

CEUX

GENMAB A/S

19/04/2024

1:13:00 PM

1,980.00

6

TQEX

GENMAB A/S

19/04/2024

1:13:00 PM

1,980.00

6

TQEX

GENMAB A/S

19/04/2024

1:13:00 PM

1,980.00

10

XCSE

GENMAB A/S

19/04/2024

1:13:02 PM

1,980.00

6

AQEU

GENMAB A/S

19/04/2024

1:13:02 PM

1,980.00

18

CEUX

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

43

XCSE

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

24

XCSE

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

19

XCSE

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

18

XCSE

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

6

AQEU

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

38

CEUX

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

38

CEUX

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

6

TQEX

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

20

CEUX

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

6

TQEX

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.00

25

XCSE

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

34

XCSE

GENMAB A/S

19/04/2024

1:13:34 PM

1,979.50

5

XCSE

GENMAB A/S

19/04/2024

1:18:40 PM

1,982.00

13

CEUX

GENMAB A/S

19/04/2024

1:18:40 PM

1,982.00

13

CEUX

GENMAB A/S

19/04/2024

1:18:40 PM

1,982.00

13

CEUX

GENMAB A/S

19/04/2024

1:18:40 PM

1,982.00

8

CEUX

GENMAB A/S

19/04/2024

1:18:40 PM

1,982.00

1

CEUX

GENMAB A/S

19/04/2024

1:18:40 PM

1,982.00

13

XCSE

GENMAB A/S

19/04/2024

1:18:40 PM

1,982.00

40

XCSE

GENMAB A/S

19/04/2024

1:23:03 PM

1,981.00

19

XCSE

GENMAB A/S

19/04/2024

1:26:03 PM

1,982.50

19

XCSE

GENMAB A/S

19/04/2024

1:27:34 PM

1,983.50

21

CEUX

GENMAB A/S

19/04/2024

1:27:34 PM

1,983.50

21

CEUX

GENMAB A/S

19/04/2024

1:28:45 PM

1,984.00

25

CEUX

GENMAB A/S

19/04/2024

1:28:45 PM

1,984.00

4

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

22

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

9

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

3

AQEU

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

1

AQEU

153


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

3

AQEU

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

1

AQEU

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

3

AQEU

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

10

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

13

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

8

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

10

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

21

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

8

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

10

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

1

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

22

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

2

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

25

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

2

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

41

CEUX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

25

XCSE

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

4

TQEX

GENMAB A/S

19/04/2024

1:29:02 PM

1,984.00

5

TQEX

154


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

1:33:06 PM

1,984.50

19

CEUX

GENMAB A/S

19/04/2024

1:33:17 PM

1,984.50

7

CEUX

GENMAB A/S

19/04/2024

1:33:17 PM

1,984.50

13

CEUX

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

1

CEUX

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

16

CEUX

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

5

CEUX

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

1

CEUX

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

5

CEUX

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

23

CEUX

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

39

XCSE

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

25

XCSE

GENMAB A/S

19/04/2024

1:36:05 PM

1,984.50

13

XCSE

GENMAB A/S

19/04/2024

1:36:06 PM

1,984.50

7

CEUX

GENMAB A/S

19/04/2024

1:36:06 PM

1,984.50

8

CEUX

GENMAB A/S

19/04/2024

1:36:06 PM

1,984.50

25

XCSE

GENMAB A/S

19/04/2024

1:36:06 PM

1,984.50

12

XCSE

GENMAB A/S

19/04/2024

1:37:42 PM

1,984.50

34

XCSE

GENMAB A/S

19/04/2024

1:40:37 PM

1,985.00

43

XCSE

GENMAB A/S

19/04/2024

1:40:37 PM

1,985.00

97

XCSE

GENMAB A/S

19/04/2024

1:44:51 PM

1,987.00

9

XCSE

GENMAB A/S

19/04/2024

1:44:51 PM

1,987.00

1

XCSE

GENMAB A/S

19/04/2024

1:44:51 PM

1,987.00

25

XCSE

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.00

18

XCSE

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.50

10

CEUX

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.50

5

CEUX

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.50

45

CEUX

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.50

5

CEUX

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.50

50

CEUX

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.50

1

CEUX

GENMAB A/S

19/04/2024

1:45:03 PM

1,986.50

4

CEUX

GENMAB A/S

19/04/2024

1:46:06 PM

1,986.50

65

CEUX

GENMAB A/S

19/04/2024

1:46:06 PM

1,986.50

3

CEUX

GENMAB A/S

19/04/2024

1:46:15 PM

1,985.50

31

XCSE

GENMAB A/S

19/04/2024

1:46:15 PM

1,985.50

28

CEUX

GENMAB A/S

19/04/2024

1:46:15 PM

1,985.50

5

TQEX

GENMAB A/S

19/04/2024

1:46:15 PM

1,985.50

5

TQEX

GENMAB A/S

19/04/2024

1:46:15 PM

1,985.50

8

TQEX

GENMAB A/S

19/04/2024

1:46:15 PM

1,985.50

31

XCSE

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

18

CEUX

155


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

18

CEUX

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

4

CEUX

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

5

TQEX

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

19

XCSE

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

36

CEUX

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

5

TQEX

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

15

TQEX

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

19

XCSE

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

4

XCSE

GENMAB A/S

19/04/2024

1:47:20 PM

1,985.00

21

CEUX

GENMAB A/S

19/04/2024

1:53:01 PM

1,982.00

8

AQEU

GENMAB A/S

19/04/2024

1:53:01 PM

1,982.00

31

XCSE

GENMAB A/S

19/04/2024

1:54:02 PM

1,981.00

19

CEUX

GENMAB A/S

19/04/2024

1:54:02 PM

1,981.00

3

CEUX

GENMAB A/S

19/04/2024

1:54:02 PM

1,981.00

4

CEUX

GENMAB A/S

19/04/2024

1:54:02 PM

1,981.00

5

TQEX

GENMAB A/S

19/04/2024

1:54:02 PM

1,981.00

24

XCSE

GENMAB A/S

19/04/2024

1:54:02 PM

1,981.00

30

XCSE

GENMAB A/S

19/04/2024

1:55:48 PM

1,982.00

35

CEUX

GENMAB A/S

19/04/2024

1:55:48 PM

1,982.00

28

XCSE

GENMAB A/S

19/04/2024

1:55:48 PM

1,982.00

14

CEUX

GENMAB A/S

19/04/2024

1:55:48 PM

1,982.00

6

TQEX

GENMAB A/S

19/04/2024

1:55:48 PM

1,982.00

11

XCSE

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.50

75

XCSE

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.50

1

XCSE

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

10

CEUX

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

5

TQEX

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

1

TQEX

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

1

AQEU

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

10

CEUX

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

2

CEUX

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

10

XCSE

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

25

XCSE

GENMAB A/S

19/04/2024

1:59:45 PM

1,983.00

10

XCSE

GENMAB A/S

19/04/2024

2:01:29 PM

1,984.00

15

XCSE

GENMAB A/S

19/04/2024

2:01:29 PM

1,984.00

17

XCSE

GENMAB A/S

19/04/2024

2:02:12 PM

1,984.50

3

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

41

CEUX

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

2

TQEX

156


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

37

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

14

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

11

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

19

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

27

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

25

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

2

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

7

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

6

AQEU

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

17

CEUX

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

24

CEUX

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

11

CEUX

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

5

TQEX

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

3

TQEX

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

6

AQEU

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

7

TQEX

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

25

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

2

XCSE

GENMAB A/S

19/04/2024

2:03:53 PM

1,984.50

17

CEUX

GENMAB A/S

19/04/2024

2:03:56 PM

1,984.50

1

XCSE

GENMAB A/S

19/04/2024

2:03:56 PM

1,984.50

46

XCSE

GENMAB A/S

19/04/2024

2:03:56 PM

1,984.50

6

CEUX

GENMAB A/S

19/04/2024

2:03:56 PM

1,984.50

18

CEUX

GENMAB A/S

19/04/2024

2:03:56 PM

1,984.50

13

CEUX

GENMAB A/S

19/04/2024

2:11:07 PM

1,986.00

39

XCSE

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

10

CEUX

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

6

CEUX

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

5

TQEX

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

1

AQEU

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

4

CEUX

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

4

CEUX

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

5

TQEX

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

5

TQEX

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

10

XCSE

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

10

XCSE

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

7

XCSE

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

10

XCSE

GENMAB A/S

19/04/2024

2:11:07 PM

1,985.50

7

XCSE

GENMAB A/S

19/04/2024

2:12:10 PM

1,985.50

6

CEUX

157


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

2:12:10 PM

1,985.50

5

TQEX

GENMAB A/S

19/04/2024

2:12:10 PM

1,985.50

10

CEUX

GENMAB A/S

19/04/2024

2:12:10 PM

1,985.50

2

CEUX

GENMAB A/S

19/04/2024

2:12:10 PM

1,985.50

7

XCSE

GENMAB A/S

19/04/2024

2:12:10 PM

1,985.50

5

TQEX

GENMAB A/S

19/04/2024

2:12:10 PM

1,985.50

7

TQEX

GENMAB A/S

19/04/2024

2:12:20 PM

1,985.50

26

XCSE

GENMAB A/S

19/04/2024

2:12:20 PM

1,985.50

29

XCSE

GENMAB A/S

19/04/2024

2:15:16 PM

1,985.00

23

XCSE

GENMAB A/S

19/04/2024

2:15:16 PM

1,985.00

1

XCSE

GENMAB A/S

19/04/2024

2:15:16 PM

1,985.00

1

XCSE

GENMAB A/S

19/04/2024

2:15:45 PM

1,984.50

6

AQEU

GENMAB A/S

19/04/2024

2:15:45 PM

1,984.50

41

CEUX

GENMAB A/S

19/04/2024

2:15:45 PM

1,984.50

7

TQEX

GENMAB A/S

19/04/2024

2:15:45 PM

1,984.50

45

XCSE

GENMAB A/S

19/04/2024

2:19:01 PM

1,985.50

14

CEUX

GENMAB A/S

19/04/2024

2:19:01 PM

1,985.50

26

CEUX

GENMAB A/S

19/04/2024

2:19:44 PM

1,986.50

33

XCSE

GENMAB A/S

19/04/2024

2:19:44 PM

1,986.50

19

XCSE

GENMAB A/S

19/04/2024

2:19:44 PM

1,987.00

7

CEUX

GENMAB A/S

19/04/2024

2:19:44 PM

1,987.00

33

CEUX

GENMAB A/S

19/04/2024

2:21:52 PM

1,987.50

36

CEUX

GENMAB A/S

19/04/2024

2:22:05 PM

1,987.50

37

CEUX

GENMAB A/S

19/04/2024

2:23:03 PM

1,987.50

17

XCSE

GENMAB A/S

19/04/2024

2:23:03 PM

1,987.50

24

XCSE

GENMAB A/S

19/04/2024

2:23:45 PM

1,987.50

14

XCSE

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

21

XCSE

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

3

XCSE

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

35

CEUX

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

13

XCSE

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

8

XCSE

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

21

XCSE

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

21

XCSE

GENMAB A/S

19/04/2024

2:23:55 PM

1,987.00

21

XCSE

GENMAB A/S

19/04/2024

2:27:02 PM

1,987.50

18

XCSE

GENMAB A/S

19/04/2024

2:27:02 PM

1,987.50

19

XCSE

GENMAB A/S

19/04/2024

2:28:30 PM

1,988.50

14

CEUX

GENMAB A/S

19/04/2024

2:29:49 PM

1,988.50

12

CEUX

GENMAB A/S

19/04/2024

2:30:43 PM

1,988.00

7

AQEU

158


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

2:30:43 PM

1,988.00

19

CEUX

GENMAB A/S

19/04/2024

2:30:43 PM

1,988.00

25

CEUX

GENMAB A/S

19/04/2024

2:30:43 PM

1,988.00

2

TQEX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

48

XCSE

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

47

XCSE

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

48

XCSE

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

30

XCSE

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

6

AQEU

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

33

CEUX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

11

CEUX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

5

CEUX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

4

TQEX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

7

TQEX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

3

TQEX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

37

CEUX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

27

CEUX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

6

CEUX

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

8

AQEU

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

16

XCSE

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

30

XCSE

GENMAB A/S

19/04/2024

2:30:48 PM

1,988.00

6

XCSE

GENMAB A/S

19/04/2024

2:36:35 PM

1,988.50

40

XCSE

GENMAB A/S

19/04/2024

2:37:30 PM

1,988.50

15

XCSE

GENMAB A/S

19/04/2024

2:37:30 PM

1,988.50

14

XCSE

GENMAB A/S

19/04/2024

2:37:30 PM

1,988.50

12

XCSE

GENMAB A/S

19/04/2024

2:38:10 PM

1,988.50

35

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

9

AQEU

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

1

AQEU

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

26

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

44

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

8

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

25

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

28

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

62

CEUX

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

8

CEUX

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

10

TQEX

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

3

TQEX

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

2

TQEX

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

8

CEUX

159


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

1

AQEU

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

8

CEUX

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

5

TQEX

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

22

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

22

XCSE

GENMAB A/S

19/04/2024

2:38:42 PM

1,987.50

27

XCSE

GENMAB A/S

19/04/2024

2:38:43 PM

1,987.50

22

XCSE

GENMAB A/S

19/04/2024

2:38:43 PM

1,987.50

10

XCSE

GENMAB A/S

19/04/2024

2:42:33 PM

1,987.00

10

XCSE

GENMAB A/S

19/04/2024

2:42:33 PM

1,987.00

51

XCSE

GENMAB A/S

19/04/2024

2:42:33 PM

1,987.00

12

CEUX

GENMAB A/S

19/04/2024

2:42:33 PM

1,987.00

9

CEUX

GENMAB A/S

19/04/2024

2:43:17 PM

1,986.00

10

XCSE

GENMAB A/S

19/04/2024

2:43:20 PM

1,986.00

32

XCSE

GENMAB A/S

19/04/2024

2:46:35 PM

1,987.00

12

CEUX

GENMAB A/S

19/04/2024

2:46:35 PM

1,987.00

2

CEUX

GENMAB A/S

19/04/2024

2:46:35 PM

1,987.00

16

XCSE

GENMAB A/S

19/04/2024

2:46:36 PM

1,987.00

14

CEUX

GENMAB A/S

19/04/2024

2:46:36 PM

1,987.00

16

XCSE

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

14

CEUX

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

16

XCSE

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

16

XCSE

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

9

XCSE

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

2

XCSE

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

14

CEUX

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

33

XCSE

GENMAB A/S

19/04/2024

2:46:37 PM

1,987.00

18

XCSE

GENMAB A/S

19/04/2024

2:50:34 PM

1,989.00

9

XCSE

GENMAB A/S

19/04/2024

2:50:34 PM

1,989.00

18

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

43

CEUX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

40

CEUX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

7

TQEX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

41

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

47

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

25

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

17

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

3

CEUX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

37

CEUX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

7

TQEX

160


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

6

AQEU

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

7

TQEX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

7

TQEX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

7

TQEX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

7

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

23

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

25

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

25

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

25

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

1

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

16

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

7

TQEX

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

8

AQEU

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

3

AQEU

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

3

AQEU

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

38

XCSE

GENMAB A/S

19/04/2024

2:53:03 PM

1,992.00

24

XCSE

GENMAB A/S

19/04/2024

2:54:42 PM

1,990.00

72

CEUX

GENMAB A/S

19/04/2024

2:54:42 PM

1,990.00

41

XCSE

GENMAB A/S

19/04/2024

2:54:42 PM

1,990.00

7

XCSE

GENMAB A/S

19/04/2024

2:54:42 PM

1,990.00

32

CEUX

GENMAB A/S

19/04/2024

2:54:42 PM

1,990.00

8

AQEU

GENMAB A/S

19/04/2024

2:54:42 PM

1,990.00

32

CEUX

GENMAB A/S

19/04/2024

3:03:17 PM

1,990.50

10

CEUX

GENMAB A/S

19/04/2024

3:03:39 PM

1,991.50

23

CEUX

GENMAB A/S

19/04/2024

3:03:39 PM

1,991.50

11

CEUX

GENMAB A/S

19/04/2024

3:04:00 PM

1,992.00

3

XCSE

GENMAB A/S

19/04/2024

3:04:00 PM

1,992.00

25

XCSE

GENMAB A/S

19/04/2024

3:04:27 PM

1,992.00

34

XCSE

GENMAB A/S

19/04/2024

3:05:01 PM

1,992.00

34

XCSE

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

46

XCSE

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

46

XCSE

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

22

XCSE

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

23

XCSE

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

34

CEUX

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

8

CEUX

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

20

CEUX

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

20

CEUX

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

2

CEUX

161


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

20

CEUX

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

2

CEUX

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

15

CEUX

GENMAB A/S

19/04/2024

3:05:01 PM

1,991.50

2

CEUX

GENMAB A/S

19/04/2024

3:05:02 PM

1,990.00

19

XCSE

GENMAB A/S

19/04/2024

3:05:02 PM

1,990.00

19

XCSE

GENMAB A/S

19/04/2024

3:05:06 PM

1,990.00

3

XCSE

GENMAB A/S

19/04/2024

3:05:06 PM

1,990.00

20

CEUX

GENMAB A/S

19/04/2024

3:05:06 PM

1,990.00

5

TQEX

GENMAB A/S

19/04/2024

3:05:06 PM

1,990.00

3

XCSE

GENMAB A/S

19/04/2024

3:05:06 PM

1,990.00

22

XCSE

GENMAB A/S

19/04/2024

3:11:25 PM

1,990.00

38

XCSE

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

9

CEUX

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

9

CEUX

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

1

CEUX

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

5

TQEX

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

9

XCSE

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

9

XCSE

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

23

XCSE

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

11

XCSE

GENMAB A/S

19/04/2024

3:11:25 PM

1,989.50

14

XCSE

GENMAB A/S

19/04/2024

3:11:30 PM

1,989.50

25

XCSE

GENMAB A/S

19/04/2024

3:11:30 PM

1,989.50

10

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

53

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

25

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

10

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

43

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

25

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

10

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

12

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

1

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

21

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

3

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

24

XCSE

GENMAB A/S

19/04/2024

3:13:49 PM

1,988.50

14

CEUX

GENMAB A/S

19/04/2024

3:19:29 PM

1,990.00

56

TQEX

GENMAB A/S

19/04/2024

3:19:29 PM

1,990.00

22

TQEX

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

43

XCSE

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

35

XCSE

162


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

23

XCSE

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

2

XCSE

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

58

XCSE

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

25

XCSE

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

23

CEUX

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

19

CEUX

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

4

CEUX

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

23

CEUX

GENMAB A/S

19/04/2024

3:19:29 PM

1,989.50

4

CEUX

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

3

AQEU

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

23

AQEU

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

26

AQEU

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

17

AQEU

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

9

AQEU

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

8

AQEU

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

23

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

3

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

26

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

29

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

4

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

1

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

5

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

12

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

4

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

12

XCSE

GENMAB A/S

19/04/2024

3:23:35 PM

1,988.00

10

XCSE

GENMAB A/S

19/04/2024

3:28:14 PM

1,991.50

8

AQEU

GENMAB A/S

19/04/2024

3:28:36 PM

1,992.00

26

XCSE

GENMAB A/S

19/04/2024

3:28:36 PM

1,992.00

25

CEUX

GENMAB A/S

19/04/2024

3:28:36 PM

1,992.00

12

CEUX

GENMAB A/S

19/04/2024

3:28:36 PM

1,992.00

13

CEUX

GENMAB A/S

19/04/2024

3:28:36 PM

1,992.00

7

CEUX

GENMAB A/S

19/04/2024

3:28:36 PM

1,992.00

37

CEUX

GENMAB A/S

19/04/2024

3:29:07 PM

1,992.00

40

XCSE

GENMAB A/S

19/04/2024

3:29:09 PM

1,991.50

9

XCSE

GENMAB A/S

19/04/2024

3:29:09 PM

1,991.50

44

XCSE

GENMAB A/S

19/04/2024

3:29:09 PM

1,991.50

9

XCSE

GENMAB A/S

19/04/2024

3:29:09 PM

1,991.50

16

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

163


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

8

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

4

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

5

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

11

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

8

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

5

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

10

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

5

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

6

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

9

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

40

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

9

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

9

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

15

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

2

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

7

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

9

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

7

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

2

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

7

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

2

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

7

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

1

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

7

AQEU

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

14

AQEU

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

7

AQEU

GENMAB A/S

19/04/2024

3:30:01 PM

1,991.50

12

AQEU

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

23

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

18

CEUX

164


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

21

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

21

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

4

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

3

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

18

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

16

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

5

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

48

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

22

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

1

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

48

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

43

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

14

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

16

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

13

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

2

TQEX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

23

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

1

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

7

AQEU

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

36

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

3

CEUX

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

25

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

3

XCSE

GENMAB A/S

19/04/2024

3:30:01 PM

1,990.50

3

XCSE

GENMAB A/S

19/04/2024

3:39:57 PM

1,994.50

8

XCSE

GENMAB A/S

19/04/2024

3:40:25 PM

1,995.50

38

AQEU

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.50

53

XCSE

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.50

67

XCSE

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.50

15

AQEU

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.50

91

CEUX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.50

16

CEUX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.50

17

TQEX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

20

CEUX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

1

CEUX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

20

CEUX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

5

TQEX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

22

XCSE

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

9

CEUX

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

6

CEUX

165


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

3:40:36 PM

1,994.00

22

XCSE

GENMAB A/S

19/04/2024

3:43:21 PM

1,994.50

105

XCSE

GENMAB A/S

19/04/2024

3:45:43 PM

1,998.00

2

XCSE

GENMAB A/S

19/04/2024

3:45:45 PM

1,998.00

10

CEUX

GENMAB A/S

19/04/2024

3:45:45 PM

1,998.00

10

CEUX

GENMAB A/S

19/04/2024

3:45:45 PM

1,998.00

11

XCSE

GENMAB A/S

19/04/2024

3:45:45 PM

1,998.00

11

XCSE

GENMAB A/S

19/04/2024

3:45:45 PM

1,998.00

82

XCSE

GENMAB A/S

19/04/2024

3:47:13 PM

1,999.50

38

CEUX

GENMAB A/S

19/04/2024

3:47:13 PM

1,999.00

37

XCSE

GENMAB A/S

19/04/2024

3:47:14 PM

1,999.00

67

XCSE

GENMAB A/S

19/04/2024

3:47:14 PM

1,999.00

41

XCSE

GENMAB A/S

19/04/2024

3:47:14 PM

1,999.00

43

CEUX

GENMAB A/S

19/04/2024

3:47:14 PM

1,999.00

7

CEUX

GENMAB A/S

19/04/2024

3:47:14 PM

1,999.00

6

CEUX

GENMAB A/S

19/04/2024

3:47:14 PM

1,999.00

13

CEUX

GENMAB A/S

19/04/2024

3:47:14 PM

1,999.00

42

XCSE

GENMAB A/S

19/04/2024

3:50:30 PM

2,001.00

40

CEUX

GENMAB A/S

19/04/2024

3:50:37 PM

2,000.00

11

TQEX

GENMAB A/S

19/04/2024

3:50:51 PM

2,000.00

17

CEUX

GENMAB A/S

19/04/2024

3:51:02 PM

2,000.00

16

AQEU

GENMAB A/S

19/04/2024

3:51:02 PM

2,000.00

58

CEUX

GENMAB A/S

19/04/2024

3:51:02 PM

2,000.00

16

CEUX

GENMAB A/S

19/04/2024

3:51:02 PM

2,000.00

6

AQEU

GENMAB A/S

19/04/2024

3:51:02 PM

2,000.00

172

XCSE

GENMAB A/S

19/04/2024

3:51:02 PM

2,000.00

63

CEUX

GENMAB A/S

19/04/2024

3:51:02 PM

2,000.00

13

TQEX

GENMAB A/S

19/04/2024

3:53:17 PM

2,001.00

35

XCSE

GENMAB A/S

19/04/2024

3:53:17 PM

2,001.00

5

XCSE

GENMAB A/S

19/04/2024

3:53:17 PM

2,001.00

8

CEUX

GENMAB A/S

19/04/2024

3:53:17 PM

2,001.00

5

TQEX

GENMAB A/S

19/04/2024

3:55:06 PM

2,001.00

3

XCSE

GENMAB A/S

19/04/2024

3:55:27 PM

2,002.00

38

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

1

AQEU

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

166


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

5

TQEX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

5

TQEX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

13

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

3

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

2

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

1

AQEU

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

2

AQEU

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

3

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

4

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

5

TQEX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

13

TQEX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

24

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

1

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

7

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

3

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

4

CEUX

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

5

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

21

XCSE

GENMAB A/S

19/04/2024

3:55:46 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

8

XCSE

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

2

XCSE

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

7

AQEU

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

14

AQEU

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

36

CEUX

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

15

XCSE

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

30

XCSE

GENMAB A/S

19/04/2024

3:55:49 PM

2,002.00

26

XCSE

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

11

TQEX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

5

TQEX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

36

TQEX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

81

XCSE

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

9

XCSE

167


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

216

XCSE

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

11

AQEU

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

1

AQEU

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

1

AQEU

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

3

AQEU

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

73

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

10

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

4

CEUX

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

1

AQEU

GENMAB A/S

19/04/2024

3:57:55 PM

2,002.00

34

AQEU

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

9

CEUX

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

9

CEUX

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

2

CEUX

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

5

TQEX

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

5

TQEX

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

8

XCSE

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

8

XCSE

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

1

XCSE

GENMAB A/S

19/04/2024

4:04:45 PM

1,994.50

9

CEUX

GENMAB A/S

19/04/2024

4:04:46 PM

1,994.50

9

CEUX

168


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

4:04:46 PM

1,994.50

8

XCSE

GENMAB A/S

19/04/2024

4:07:01 PM

1,998.00

36

CEUX

GENMAB A/S

19/04/2024

4:07:16 PM

1,998.00

41

CEUX

GENMAB A/S

19/04/2024

4:07:54 PM

2,001.00

7

CEUX

GENMAB A/S

19/04/2024

4:08:06 PM

2,002.00

5

CEUX

GENMAB A/S

19/04/2024

4:08:11 PM

2,002.00

36

CEUX

GENMAB A/S

19/04/2024

4:08:11 PM

2,002.00

36

CEUX

GENMAB A/S

19/04/2024

4:08:33 PM

2,002.00

35

CEUX

GENMAB A/S

19/04/2024

4:08:55 PM

2,002.00

36

CEUX

GENMAB A/S

19/04/2024

4:08:57 PM

2,001.00

38

CEUX

GENMAB A/S

19/04/2024

4:08:57 PM

2,001.00

24

TQEX

GENMAB A/S

19/04/2024

4:08:57 PM

2,001.00

173

XCSE

GENMAB A/S

19/04/2024

4:08:57 PM

2,001.00

24

TQEX

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

17

XCSE

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

38

XCSE

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

56

XCSE

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

10

CEUX

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

8

CEUX

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

46

CEUX

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

7

TQEX

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

30

XCSE

GENMAB A/S

19/04/2024

4:09:56 PM

2,001.00

28

XCSE

GENMAB A/S

19/04/2024

4:11:45 PM

1,999.00

6

XCSE

GENMAB A/S

19/04/2024

4:14:37 PM

2,003.00

3

XCSE

GENMAB A/S

19/04/2024

4:14:40 PM

2,004.00

29

CEUX

GENMAB A/S

19/04/2024

4:14:40 PM

2,004.00

12

CEUX

GENMAB A/S

19/04/2024

4:14:57 PM

2,004.00

36

CEUX

GENMAB A/S

19/04/2024

4:14:57 PM

2,004.00

3

CEUX

GENMAB A/S

19/04/2024

4:15:51 PM

2,005.00

50

XCSE

GENMAB A/S

19/04/2024

4:15:51 PM

2,005.00

22

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

12

AQEU

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

16

AQEU

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

14

AQEU

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

37

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

217

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

59

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

158

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

62

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

9

AQEU

169


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

5

AQEU

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

113

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

65

XCSE

GENMAB A/S

19/04/2024

4:15:57 PM

2,004.00

28

XCSE

GENMAB A/S

19/04/2024

4:24:13 PM

2,004.00

10

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

24

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

33

AQEU

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

15

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

53

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

9

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

445

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

20

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

14

XCSE

GENMAB A/S

19/04/2024

4:24:29 PM

2,004.00

41

AQEU

GENMAB A/S

19/04/2024

4:31:31 PM

2,010.00

34

CEUX

GENMAB A/S

19/04/2024

4:32:02 PM

2,009.00

20

AQEU

GENMAB A/S

19/04/2024

4:32:02 PM

2,009.00

159

XCSE

GENMAB A/S

19/04/2024

4:32:02 PM

2,009.00

10

AQEU

GENMAB A/S

19/04/2024

4:32:03 PM

2,009.00

56

XCSE

GENMAB A/S

19/04/2024

4:32:03 PM

2,009.00

103

XCSE

GENMAB A/S

19/04/2024

4:32:03 PM

2,009.00

30

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

45

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

42

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

42

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

6

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

26

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

11

AQEU

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

11

AQEU

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

23

AQEU

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

13

TQEX

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

13

TQEX

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

14

TQEX

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

6

TQEX

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

4

TQEX

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

7

AQEU

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

14

AQEU

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

7

TQEX

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

10

TQEX

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

15

XCSE

170


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

38

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

37

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

37

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

7

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

7

XCSE

GENMAB A/S

19/04/2024

4:33:09 PM

2,008.00

19

XCSE

GENMAB A/S

19/04/2024

4:34:35 PM

2,006.00

26

XCSE

GENMAB A/S

19/04/2024

4:34:35 PM

2,006.00

9

XCSE

GENMAB A/S

19/04/2024

4:34:35 PM

2,006.00

5

AQEU

GENMAB A/S

19/04/2024

4:34:35 PM

2,006.00

5

TQEX

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

36

XCSE

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

36

XCSE

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

37

XCSE

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

45

XCSE

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

87

XCSE

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

20

AQEU

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

5

AQEU

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

3

AQEU

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

17

TQEX

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

2

TQEX

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

2

TQEX

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

54

XCSE

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

29

TQEX

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

72

XCSE

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

8

AQEU

GENMAB A/S

19/04/2024

4:35:09 PM

2,006.00

11

AQEU

GENMAB A/S

19/04/2024

4:41:35 PM

2,001.00

3

AQEU

GENMAB A/S

19/04/2024

4:41:35 PM

2,001.00

5

TQEX

GENMAB A/S

19/04/2024

4:41:35 PM

2,001.00

5

TQEX

GENMAB A/S

19/04/2024

4:41:35 PM

2,001.00

19

XCSE

GENMAB A/S

19/04/2024

4:41:35 PM

2,001.00

2

XCSE

GENMAB A/S

19/04/2024

4:41:35 PM

2,001.00

19

XCSE

GENMAB A/S

19/04/2024

4:41:35 PM

2,001.00

18

XCSE

GENMAB A/S

19/04/2024

4:42:47 PM

2,004.00

21

AQEU

GENMAB A/S

19/04/2024

4:42:47 PM

2,004.00

23

TQEX

GENMAB A/S

19/04/2024

4:42:47 PM

2,004.00

52

XCSE

GENMAB A/S

19/04/2024

4:42:52 PM

2,004.00

19

CEUX

GENMAB A/S

19/04/2024

4:42:52 PM

2,004.00

29

CEUX

GENMAB A/S

19/04/2024

4:42:52 PM

2,004.00

14

XCSE

171


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

4:43:46 PM

2,004.00

5

AQEU

GENMAB A/S

19/04/2024

4:43:46 PM

2,004.00

22

TQEX

GENMAB A/S

19/04/2024

4:43:46 PM

2,004.00

75

XCSE

GENMAB A/S

19/04/2024

4:43:46 PM

2,004.00

88

XCSE

GENMAB A/S

19/04/2024

4:43:46 PM

2,004.00

16

AQEU

GENMAB A/S

19/04/2024

4:45:53 PM

2,003.00

24

XCSE

GENMAB A/S

19/04/2024

4:45:54 PM

2,003.00

24

XCSE

GENMAB A/S

19/04/2024

4:45:54 PM

2,003.00

2

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

23

AQEU

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

10

AQEU

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

14

AQEU

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

10

AQEU

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

34

CEUX

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

49

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

75

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

142

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

75

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

75

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

30

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

23

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

243

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

54

XCSE

GENMAB A/S

19/04/2024

4:47:01 PM

2,004.00

1

XCSE

GENMAB A/S

19/04/2024

4:49:32 PM

2,005.00

3

AQEU

GENMAB A/S

19/04/2024

4:49:32 PM

2,005.00

22

XCSE

GENMAB A/S

19/04/2024

4:49:34 PM

2,005.00

22

XCSE

GENMAB A/S

19/04/2024

4:49:45 PM

2,005.00

3

AQEU

GENMAB A/S

19/04/2024

4:49:45 PM

2,005.00

2

XCSE

GENMAB A/S

19/04/2024

4:50:02 PM

2,005.00

20

XCSE

GENMAB A/S

19/04/2024

4:50:08 PM

2,005.00

10

XCSE

GENMAB A/S

19/04/2024

4:51:16 PM

2,005.00

12

XCSE

GENMAB A/S

19/04/2024

4:51:16 PM

2,005.00

3

AQEU

GENMAB A/S

19/04/2024

4:51:16 PM

2,005.00

22

XCSE

GENMAB A/S

19/04/2024

4:52:14 PM

2,005.00

8

AQEU

GENMAB A/S

19/04/2024

4:52:17 PM

2,005.00

2

AQEU

GENMAB A/S

19/04/2024

4:52:32 PM

2,007.00

2

CEUX

GENMAB A/S

19/04/2024

4:52:32 PM

2,007.00

11

CEUX

GENMAB A/S

19/04/2024

4:52:32 PM

2,007.00

10

CEUX

GENMAB A/S

19/04/2024

4:52:32 PM

2,007.00

14

CEUX

172


Exhibit 99.1(a)

APPENDIX Share buy-back programme - Specification for April15, – April 19, 2024

Graphic

GENMAB A/S

19/04/2024

4:52:32 PM

2,006.00

18

XCSE

GENMAB A/S

19/04/2024

4:52:32 PM

2,006.00

19

XCSE

GENMAB A/S

19/04/2024

4:52:32 PM

2,006.00

18

XCSE

GENMAB A/S

19/04/2024

4:52:32 PM

2,006.00

20

XCSE

GENMAB A/S

19/04/2024

4:52:58 PM

2,007.00

7

AQEU

GENMAB A/S

19/04/2024

4:53:03 PM

2,007.00

5

AQEU

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

11

AQEU

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

14

AQEU

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

14

AQEU

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

14

AQEU

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

11

TQEX

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

15

XCSE

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

68

XCSE

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

112

XCSE

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

63

XCSE

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

2

AQEU

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

24

XCSE

GENMAB A/S

19/04/2024

4:53:19 PM

2,007.00

11

XCSE

GENMAB A/S

19/04/2024

4:53:45 PM

2,007.00

11

XCSE

GENMAB A/S

19/04/2024

4:53:45 PM

2,007.00

59

XCSE

GENMAB A/S

19/04/2024

4:53:45 PM

2,007.00

56

XCSE

GENMAB A/S

19/04/2024

4:53:45 PM

2,007.00

16

XCSE

173