<?xml version="1.0" encoding="us-ascii"?>
<!--XBRL document created with Toppan Merrill Bridge  9.3.0.107 -->
<!--Based on XBRL 2.1-->
<!--Created on: 8/14/2019 12:05:45 PM-->
<!--Modified on: 8/14/2019 12:05:45 PM-->
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  <element id="gmab_LicenseFeesMember" name="LicenseFeesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ReimbursementIncomeMember" name="ReimbursementIncomeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsCollaborativeArrangementAndArrangementOtherThanCollaborativeAxis" name="IfrsCollaborativeArrangementAndArrangementOtherThanCollaborativeAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsCollaborativeArrangementAndArrangementOtherThanCollaborativeDomain" name="IfrsCollaborativeArrangementAndArrangementOtherThanCollaborativeDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_AgreementsWithJanssenMember" name="AgreementsWithJanssenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_AgreementsWithNovartisMember" name="AgreementsWithNovartisMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_OtherCollaborationPartnersMember" name="OtherCollaborationPartnersMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_DisclosureOfBalanceSheetInformationRelatingToLeasesTableTextBlock" name="DisclosureOfBalanceSheetInformationRelatingToLeasesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_DisclosureOfComprehensiveInformationRelatingToLeasesTableTextBlock" name="DisclosureOfComprehensiveInformationRelatingToLeasesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_PropertiesMember" name="PropertiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsEquipmentMember" name="IfrsEquipmentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_DisclosureOfFinanceIncomeExpensesAbstract" name="DisclosureOfFinanceIncomeExpensesAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_DisclosureOfFinanceIncomeExpensesTableTextBlock" name="DisclosureOfFinanceIncomeExpensesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_FinanceIncomeAbstract" name="FinanceIncomeAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_GainsOnHedgingInstruments" name="GainsOnHedgingInstruments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_InterestAndOtherFinancialIncome" name="InterestAndOtherFinancialIncome" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_GainsOnMarketableSecurities" name="GainsOnMarketableSecurities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_FinanceExpensesAbstract" name="FinanceExpensesAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_InterestAndOtherFinancialExpenses" name="InterestAndOtherFinancialExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_LossesOnMarketableSecurities" name="LossesOnMarketableSecurities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareholdingsByBoardOfDirectorsAndExecutiveManagementAbstract" name="ShareholdingsByBoardOfDirectorsAndExecutiveManagementAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareholdingsByBoardOfDirectorsAndExecutiveManagementDisclosureTextBlock" name="ShareholdingsByBoardOfDirectorsAndExecutiveManagementDisclosureTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_DisclosureOfShareholdingsByBoardOfDirectorsAndExecutiveManagementTableTextBlock" name="DisclosureOfShareholdingsByBoardOfDirectorsAndExecutiveManagementTableTextBlock" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareholdingsByBoardOfDirectorsAndExecutiveManagementTable" name="ShareholdingsByBoardOfDirectorsAndExecutiveManagementTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorsAndExecutiveManagementMember" name="BoardOfDirectorsAndExecutiveManagementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorsMember" name="BoardOfDirectorsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorMatsPetterssonMember" name="BoardOfDirectorMatsPetterssonMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorAndersGerselPedersenMember" name="BoardOfDirectorAndersGerselPedersenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorPernilleErenbjergMember" name="BoardOfDirectorPernilleErenbjergMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorPaoloPaolettiMember" name="BoardOfDirectorPaoloPaolettiMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorRolfHoffmannMember" name="BoardOfDirectorRolfHoffmannMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorDeirdreP.ConnellyMember" name="BoardOfDirectorDeirdreP.ConnellyMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorPeterStormKristensenMember" name="BoardOfDirectorPeterStormKristensenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorRickHibbertMember" name="BoardOfDirectorRickHibbertMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorMijkeZachariasseMember" name="BoardOfDirectorMijkeZachariasseMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorDanielBrunoMember" name="BoardOfDirectorDanielBrunoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ExecutiveManagementMember" name="ExecutiveManagementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ExecutiveManagerJanVanDeWinkelMember" name="ExecutiveManagerJanVanDeWinkelMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ExecutiveManagerDavidA.EatwellMember" name="ExecutiveManagerDavidA.EatwellMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ExecutiveManagerJudithKlimovskyMember" name="ExecutiveManagerJudithKlimovskyMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsRestrictedStockUnitsRSUsMember" name="IfrsRestrictedStockUnitsRSUsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareholdingsByBoardOfDirectorsAndExecutiveManagementLineitems" name="ShareholdingsByBoardOfDirectorsAndExecutiveManagementLineitems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfSharesOwned" name="NumberOfSharesOwned" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfSharesAcquiredDuringPeriod" name="NumberOfSharesAcquiredDuringPeriod" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfWarrantsHeld" name="NumberOfWarrantsHeld" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfWarrantsGrantedDuringPeriod" name="NumberOfWarrantsGrantedDuringPeriod" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfWarrantsExercisedDuringPeriod" name="NumberOfWarrantsExercisedDuringPeriod" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfWarrantsTransferredDuringPeriod" name="NumberOfWarrantsTransferredDuringPeriod" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfOtherEquityInstrumentsSettledInShareBasedPaymentArrangement" name="NumberOfOtherEquityInstrumentsSettledInShareBasedPaymentArrangement" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfOtherEquityInstrumentsTransferredInShareBasedPaymentArrangement" name="NumberOfOtherEquityInstrumentsTransferredInShareBasedPaymentArrangement" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfIndependentDirectors" name="NumberOfIndependentDirectors" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfNonIndependentDirectors" name="NumberOfNonIndependentDirectors" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfEmployeeElectedDirectors" name="NumberOfEmployeeElectedDirectors" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_BoardOfDirectorsReElectedTerm" name="BoardOfDirectorsReElectedTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_EmployeeElectedBoardOfDirectorsTerm" name="EmployeeElectedBoardOfDirectorsTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_MarketableSecuritiesMember" name="MarketableSecuritiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_TripleaRatingMember" name="TripleaRatingMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_FairValueAdjustmentOfMarketableSecurities" name="FairValueAdjustmentOfMarketableSecurities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_FairValueAdjustmentOfMarketableSecuritiesDuringPeriod" name="FairValueAdjustmentOfMarketableSecuritiesDuringPeriod" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_MarketableSecuritiesNetBookValueInPercentageOfCost" name="MarketableSecuritiesNetBookValueInPercentageOfCost" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_MarketableSecuritiesAverageEffectiveDuration" name="MarketableSecuritiesAverageEffectiveDuration" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_PercentageOfMarketableSecurities" name="PercentageOfMarketableSecurities" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ForeignExchangeAdjustmentOfMarketableSecurities" name="ForeignExchangeAdjustmentOfMarketableSecurities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_DisclosureOfWarrantsActivityTableTextBlock" name="DisclosureOfWarrantsActivityTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_RestrictedStockUnitsRSUsMember" name="RestrictedStockUnitsRSUsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_StockRepurchaseFirstAuthorizationMember" name="StockRepurchaseFirstAuthorizationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_StockRepurchaseSecondAuthorizationMember" name="StockRepurchaseSecondAuthorizationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" name="IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareBasedArrangementPeriodFromVestingDateHolderReceivesShares" name="ShareBasedArrangementPeriodFromVestingDateHolderReceivesShares" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareBasedArrangementNumberOfSharesPerRsu" name="ShareBasedArrangementNumberOfSharesPerRsu" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareBasedArrangementNumberOfAuthorization" name="ShareBasedArrangementNumberOfAuthorization" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfSharesAuthorizedToBeRepurchased" name="NumberOfSharesAuthorizedToBeRepurchased" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_SharesRepurchasedNominalValue" name="SharesRepurchasedNominalValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareRepurchasedDuringPeriodShares" name="ShareRepurchasedDuringPeriodShares" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_ShareRepurchasedDuringPeriodValue" name="ShareRepurchasedDuringPeriodValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_SharesAvailableForRepurchase" name="SharesAvailableForRepurchase" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_SharesAvailableForRepurchaseAmount" name="SharesAvailableForRepurchaseAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_TreasurySharesAcquired" name="TreasurySharesAcquired" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_PercentageOfShareCapitalRepurchased" name="PercentageOfShareCapitalRepurchased" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_Weightedaveragefairvalueofotherequityinstrumentsgrantedinsharebasedpaymentarrangement" name="Weightedaveragefairvalueofotherequityinstrumentsgrantedinsharebasedpaymentarrangement" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_WarrantsGrantedFromAugust2004UntilApril2012Member" name="WarrantsGrantedFromAugust2004UntilApril2012Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_WarrantsGrantedFromApril2012UntilMarch2017Member" name="WarrantsGrantedFromApril2012UntilMarch2017Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_WarrantsGrantedFromMarch2017Member" name="WarrantsGrantedFromMarch2017Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_WarrantVestingPeriod" name="WarrantVestingPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfWarrantsOutstanding" name="NumberOfWarrantsOutstanding" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfWarrantsExpiredOrLapsedOrCancelledDuringPeriod" name="NumberOfWarrantsExpiredOrLapsedOrCancelledDuringPeriod" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_WeightedAverageExercisePriceOfWarrantsGranted" name="WeightedAverageExercisePriceOfWarrantsGranted" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_WeightedAverageExercisePriceOfWarrantsExercised" name="WeightedAverageExercisePriceOfWarrantsExercised" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_PercentageOfShareCapitalAttributedToExerciseOfWarrants" name="PercentageOfShareCapitalAttributedToExerciseOfWarrants" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" name="IfrsCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_EquityAdjustedForCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" name="EquityAdjustedForCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_WeightedAverageExercisePriceOfFairValueOfWarrants" name="WeightedAverageExercisePriceOfFairValueOfWarrants" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_DescriptionOfAccountingPolicyForJudgmentsAndEstimatesPolicyTextBlock" name="DescriptionOfAccountingPolicyForJudgmentsAndEstimatesPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_StockRepurchaseThresholdPriceDeviationPercentage" name="StockRepurchaseThresholdPriceDeviationPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_NumberOfExternalInvestmentManagers" name="NumberOfExternalInvestmentManagers" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_FutureMinimumOperatingLeasePayments" name="FutureMinimumOperatingLeasePayments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_EstimatedCapitalExpenditureForLease" name="EstimatedCapitalExpenditureForLease" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_AmericanDepositorySharesMember" name="AmericanDepositorySharesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsSubsidiarySaleOfStockAxis" name="IfrsSubsidiarySaleOfStockAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsSaleOfStockNameOfTransactionDomain" name="IfrsSaleOfStockNameOfTransactionDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsOverAllotmentOptionMember" name="IfrsOverAllotmentOptionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_IfrsSharePrice" name="IfrsSharePrice" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_SubscriptionPricePerShare" name="SubscriptionPricePerShare" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_AmericanDepositorySharesPerShareRatio" name="AmericanDepositorySharesPerShareRatio" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="gmab_PaymentOfUnderwritingCommissions" name="PaymentOfUnderwritingCommissions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
