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    <link:label id="lab_argx_NumberOnNominatedTargetUnderAgreement_documentation_en-US" xlink:label="lab_argx_NumberOnNominatedTargetUnderAgreement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number on Nominated Target Under Agreement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_NumberOnNominatedTargetUnderAgreement" xlink:href="argx-20260630.xsd#argx_NumberOnNominatedTargetUnderAgreement"/>
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    <link:label id="lab_ifrs-full_CurrentLiabilitiesAbstract_e0602a63-4912-45a6-b1bb-ab5f6dd52048_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentLiabilitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current liabilities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract" xlink:to="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ScheduleOfCurrentFinancialAssetsTableTextBlock_f9aef7f7-d765-45f2-ade4-d769d3dc4328_terseLabel_en-US" xlink:label="lab_argx_ScheduleOfCurrentFinancialAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of current financial assets</link:label>
    <link:label id="lab_argx_ScheduleOfCurrentFinancialAssetsTableTextBlock_label_en-US" xlink:label="lab_argx_ScheduleOfCurrentFinancialAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Current Financial Assets [Table Text Block]</link:label>
    <link:label id="lab_argx_ScheduleOfCurrentFinancialAssetsTableTextBlock_documentation_en-US" xlink:label="lab_argx_ScheduleOfCurrentFinancialAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Current Financial Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ScheduleOfCurrentFinancialAssetsTableTextBlock" xlink:href="argx-20260630.xsd#argx_ScheduleOfCurrentFinancialAssetsTableTextBlock"/>
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    <link:label id="lab_currency_AllCurrenciesDomain_6c4aedaa-0db0-4c3f-b4a2-8ceb4235e794_terseLabel_en-US" xlink:label="lab_currency_AllCurrenciesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Currencies [Domain]</link:label>
    <link:label id="lab_currency_AllCurrenciesDomain_label_en-US" xlink:label="lab_currency_AllCurrenciesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Currencies [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
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    <link:label id="lab_ifrs-full_EquityAbstract_89176d30-dd74-4ad0-a8e7-ffe8beaa954b_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_ifrs-full_EquityAbstract_label_en-US" xlink:label="lab_ifrs-full_EquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAbstract" xlink:to="lab_ifrs-full_EquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentInterestReceivable_6c5984e3-7d3a-4217-91d3-a27347c6df7f_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentInterestReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest receivables</link:label>
    <link:label id="lab_ifrs-full_CurrentInterestReceivable_label_en-US" xlink:label="lab_ifrs-full_CurrentInterestReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current interest receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentInterestReceivable" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentInterestReceivable"/>
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    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of operating segments [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOperatingSegmentsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOperatingSegmentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOperatingSegmentsAbstract" xlink:to="lab_ifrs-full_DisclosureOfOperatingSegmentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashAndCashEquivalentsAbstract_label_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalentsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalentsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashAndCashEquivalentsAbstract" xlink:to="lab_ifrs-full_CashAndCashEquivalentsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Equity_924ad97b-6ac3-4d70-b322-dfa4e4676b90_totalLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total equity</link:label>
    <link:label id="lab_ifrs-full_Equity_69ac17ad-f772-4fd2-adc9-10fc77696a26_periodStartLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Equity at beginning of period</link:label>
    <link:label id="lab_ifrs-full_Equity_bdbd375b-da33-4c8a-b939-5075a0d40be8_periodEndLabel_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Equity at end of period</link:label>
    <link:label id="lab_ifrs-full_Equity_label_en-US" xlink:label="lab_ifrs-full_Equity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Equity" xlink:to="lab_ifrs-full_Equity" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_NumberOfOperatingSegments_d1b37926-44ce-43ad-872d-b0edeac6d7c7_terseLabel_en-US" xlink:label="lab_argx_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of operating segments</link:label>
    <link:label id="lab_argx_NumberOfOperatingSegments_label_en-US" xlink:label="lab_argx_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Operating Segments</link:label>
    <link:label id="lab_argx_NumberOfOperatingSegments_documentation_en-US" xlink:label="lab_argx_NumberOfOperatingSegments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_NumberOfOperatingSegments" xlink:href="argx-20260630.xsd#argx_NumberOfOperatingSegments"/>
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    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_1f75a6ac-e7eb-462c-b335-1a8e8313773b_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of transactions between related parties [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of transactions between related parties [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperations_e3226730-bd4e-408d-8589-059fe55cad67_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperations" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash flows from operating activities, before interest and taxes</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperations_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash flows from (used in) operations</link:label>
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    <link:label id="lab_argx_EfgartigimodMember_8a8552d8-b302-4485-9968-54c9df085aeb_terseLabel_en-US" xlink:label="lab_argx_EfgartigimodMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Efgartigimod</link:label>
    <link:label id="lab_argx_EfgartigimodMember_label_en-US" xlink:label="lab_argx_EfgartigimodMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Efgartigimod</link:label>
    <link:label id="lab_argx_EfgartigimodMember_documentation_en-US" xlink:label="lab_argx_EfgartigimodMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents information pertaining to efgartigimod.</link:label>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments_695e4422-f36b-44a7-b6ed-a636c6d8597e_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value (loss) or gain on investments in equity instruments designated as FVTOCI</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromExerciseOfOptions_05bf706d-2ff5-4913-828a-807dee2c8414_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from exercise of stock options</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfCommitmentsExplanatory_79ae35c3-6940-4d20-b300-037624340978_verboseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfCommitmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Commitments</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of transactions between related parties [abstract]</link:label>
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    <link:label id="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_2a4fd04c-20f1-4d55-82f9-74480bf71b5f_negatedLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of current financial assets</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Purchase of financial instruments, classified as investing activities</link:label>
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    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_e9926b50-8f64-4221-8ca7-a837c63d0e29_verboseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Vesting of RSUs (in shares)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets"/>
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    <link:label id="lab_argx_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsTableTextBlock_21a32558-91d5-48b1-aee5-41c063b111a4_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of cash and cash equivalents</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsTableTextBlock" xlink:href="argx-20260630.xsd#argx_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsTableTextBlock" xlink:to="lab_argx_DisclosureOfDetailedInformationAboutCashAndCashEquivalentsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_country_CN_72acc8a4-0fa4-4d8d-9a5c-18d12839e197_terseLabel_en-US" xlink:label="lab_country_CN" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">China</link:label>
    <link:label id="lab_country_CN_label_en-US" xlink:label="lab_country_CN" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CHINA</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CN"/>
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    <link:label id="lab_argx_ConversionOfStockSharesIssued_cd5817d7-46d7-4df1-8320-1fa02724ec5b_terseLabel_en-US" xlink:label="lab_argx_ConversionOfStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of shares on conversion (in shares)</link:label>
    <link:label id="lab_argx_ConversionOfStockSharesIssued_label_en-US" xlink:label="lab_argx_ConversionOfStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Shares Issued</link:label>
    <link:label id="lab_argx_ConversionOfStockSharesIssued_documentation_en-US" xlink:label="lab_argx_ConversionOfStockSharesIssued" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ConversionOfStockSharesIssued" xlink:href="argx-20260630.xsd#argx_ConversionOfStockSharesIssued"/>
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    <link:label id="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of comprehensive income [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfComprehensiveIncomeAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityLineItems_c3b1d8d4-d091-469b-b68f-2d1136d5fec0_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement of changes in equity [line items]</link:label>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityLineItems_label_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of changes in equity [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="lab_ifrs-full_StatementOfChangesInEquityLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract_61bf5684-ad5a-454a-be50-3467eb11b1d9_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total comprehensive income/(loss) attributable to:</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive income attributable to [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:to="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract_f130f1a4-7126-4fd8-a86e-33ecc8460155_terseLabel_en-US" xlink:label="lab_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Items that will not be reclassified subsequently to profit or loss, net of tax</link:label>
    <link:label id="lab_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract_label_en-US" xlink:label="lab_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Components of other comprehensive income that will not be reclassified to profit or loss, net of tax [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:to="lab_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinanceIncome_7bf3f1e7-28e1-4b46-aa73-69e47c35323e_terseLabel_en-US" xlink:label="lab_ifrs-full_FinanceIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial income</link:label>
    <link:label id="lab_ifrs-full_FinanceIncome_label_en-US" xlink:label="lab_ifrs-full_FinanceIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinanceIncome" xlink:to="lab_ifrs-full_FinanceIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_e7f68fdd-b00e-411a-a86b-1b7ba29ed4ad_verboseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of options granted (in shares)</link:label>
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    <link:label id="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_label_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of share options granted in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/>
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    <link:label id="lab_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesAbstract_019efcb2-3b65-7136-8c5d-6d6a744e5df3_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure Of Basis Of Preparation And Changes In Accounting Policies [Abstract]</link:label>
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    <link:label id="lab_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesAbstract_documentation_en-US" xlink:label="lab_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">No definition available.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesAbstract" xlink:href="argx-20260630.xsd#argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesAbstract"/>
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    <link:label id="lab_ifrs-full_CostOfMerchandiseSold_2cdf7c3c-7174-462b-b3c3-fb1df5bedf28_terseLabel_en-US" xlink:label="lab_ifrs-full_CostOfMerchandiseSold" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of merchandise sold</link:label>
    <link:label id="lab_ifrs-full_CostOfMerchandiseSold_label_en-US" xlink:label="lab_ifrs-full_CostOfMerchandiseSold" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of merchandise sold</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfMerchandiseSold" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CostOfMerchandiseSold"/>
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    <link:label id="lab_ifrs-full_DisclosureOfGeographicalAreasTable_21ad3c38-c781-42fa-87a2-9fdd89851581_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfGeographicalAreasTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of geographical areas [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfGeographicalAreasTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfGeographicalAreasTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of geographical areas [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfGeographicalAreasTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfGeographicalAreasTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfGeographicalAreasTable" xlink:to="lab_ifrs-full_DisclosureOfGeographicalAreasTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of non-adjusting events after reporting period [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodAbstract"/>
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    <link:label id="lab_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract_cf227ea4-4f50-4270-a5dd-635abaa3ceca_terseLabel_en-US" xlink:label="lab_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Movements in current assets/liabilities</link:label>
    <link:label id="lab_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract_label_en-US" xlink:label="lab_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Movements in Current Assets or Liabilities [Abstract]</link:label>
    <link:label id="lab_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract_documentation_en-US" xlink:label="lab_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">No definition available.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract" xlink:href="argx-20260630.xsd#argx_MovementsInCurrentAssetsOrLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract" xlink:to="lab_argx_MovementsInCurrentAssetsOrLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable_d91460eb-30dd-4f92-b29c-6b1aefeb931b_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [table]</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_11b5ffda-cdc5-404e-8394-554e7527a341_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Owners of the parent</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Profit (loss), attributable to owners of parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:to="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DescriptionOfBasisOfPreparationPolicyTextBlock_019efcae-d5f8-70bf-bdf2-6b5068dbf126_terseLabel_en-US" xlink:label="lab_argx_DescriptionOfBasisOfPreparationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of preparation</link:label>
    <link:label id="lab_argx_DescriptionOfBasisOfPreparationPolicyTextBlock_label_en-US" xlink:label="lab_argx_DescriptionOfBasisOfPreparationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Description Of Basis Of Preparation [Policy Text Block]</link:label>
    <link:label id="lab_argx_DescriptionOfBasisOfPreparationPolicyTextBlock_documentation_en-US" xlink:label="lab_argx_DescriptionOfBasisOfPreparationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Description Of Basis Of Preparation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DescriptionOfBasisOfPreparationPolicyTextBlock" xlink:href="argx-20260630.xsd#argx_DescriptionOfBasisOfPreparationPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DescriptionOfBasisOfPreparationPolicyTextBlock" xlink:to="lab_argx_DescriptionOfBasisOfPreparationPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SharePremiumMember_b8f233c6-5fd2-4214-8b89-cebb26903483_terseLabel_en-US" xlink:label="lab_ifrs-full_SharePremiumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share premium</link:label>
    <link:label id="lab_ifrs-full_SharePremiumMember_label_en-US" xlink:label="lab_ifrs-full_SharePremiumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share premium [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharePremiumMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharePremiumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SharePremiumMember" xlink:to="lab_ifrs-full_SharePremiumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_StatementOfFinancialPositionAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfFinancialPositionAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of financial position [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfFinancialPositionAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfFinancialPositionAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfFinancialPositionAbstract" xlink:to="lab_ifrs-full_StatementOfFinancialPositionAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SalesAndMarketingExpense_081550c8-7776-4db8-b7b9-1e25bc2257e6_terseLabel_en-US" xlink:label="lab_ifrs-full_SalesAndMarketingExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marketing services</link:label>
    <link:label id="lab_ifrs-full_SalesAndMarketingExpense_label_en-US" xlink:label="lab_ifrs-full_SalesAndMarketingExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sales and marketing expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SalesAndMarketingExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SalesAndMarketingExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SalesAndMarketingExpense" xlink:to="lab_ifrs-full_SalesAndMarketingExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForProvisions_f0934e61-c5ad-4a1b-89e5-9d7c8acfa939_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForProvisions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provisions for employee benefits</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForProvisions_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments for provisions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForProvisions" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForProvisions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForProvisions" xlink:to="lab_ifrs-full_AdjustmentsForProvisions" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CoverAbstract_label_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract" xlink:to="lab_dei_CoverAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_c1e93df4-5fa0-43a7-8384-e1a8d4de4492_totalLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total comprehensive income for the period</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive income, attributable to owners of parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:to="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_PriorTo2024GrantsMember_019f470b-db73-7641-852a-82308fa9e188_terseLabel_en-US" xlink:label="lab_argx_PriorTo2024GrantsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prior To 2024 Grants</link:label>
    <link:label id="lab_argx_PriorTo2024GrantsMember_label_en-US" xlink:label="lab_argx_PriorTo2024GrantsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prior To 2024 Grants [Member]</link:label>
    <link:label id="lab_argx_PriorTo2024GrantsMember_documentation_en-US" xlink:label="lab_argx_PriorTo2024GrantsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Prior To 2024 Grants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_PriorTo2024GrantsMember" xlink:href="argx-20260630.xsd#argx_PriorTo2024GrantsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_PriorTo2024GrantsMember" xlink:to="lab_argx_PriorTo2024GrantsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock_f37503a0-cdf1-4cf4-996a-574d16cf4165_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of trade and other payables</link:label>
    <link:label id="lab_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock_label_en-US" xlink:label="lab_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of trade and other payables [table text block]</link:label>
    <link:label id="lab_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock_documentation_en-US" xlink:label="lab_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The entire disclosure of trade and other payables.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock" xlink:href="argx-20260630.xsd#argx_DisclosureOfTradeAndOtherPayablesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock" xlink:to="lab_argx_DisclosureOfTradeAndOtherPayablesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage_67457af9-82fb-4540-8f6a-d69c4ff99e28_terseLabel_en-US" xlink:label="lab_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting percentage</link:label>
    <link:label id="lab_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage_label_en-US" xlink:label="lab_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage</link:label>
    <link:label id="lab_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage_documentation_en-US" xlink:label="lab_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of vesting of share-based compensation awards.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage" xlink:href="argx-20260630.xsd#argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage" xlink:to="lab_argx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_StockOptionPlanMember_4392ae35-862d-4ade-832b-8b80aaec78ab_terseLabel_en-US" xlink:label="lab_argx_StockOptionPlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock options</link:label>
    <link:label id="lab_argx_StockOptionPlanMember_label_en-US" xlink:label="lab_argx_StockOptionPlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Option Plan [Member]</link:label>
    <link:label id="lab_argx_StockOptionPlanMember_documentation_en-US" xlink:label="lab_argx_StockOptionPlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Stock Options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_StockOptionPlanMember" xlink:href="argx-20260630.xsd#argx_StockOptionPlanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_StockOptionPlanMember" xlink:to="lab_argx_StockOptionPlanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Liabilities_296358f7-4510-46cf-a277-5fd5ff7fe7f5_totalLabel_en-US" xlink:label="lab_ifrs-full_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_ifrs-full_Liabilities_label_en-US" xlink:label="lab_ifrs-full_Liabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Liabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Liabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Liabilities" xlink:to="lab_ifrs-full_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherAdjustmentsForNoncashItems_aa2babad-4003-498a-9dd0-abeaacf786d9_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other non-cash expenses/(benefit)</link:label>
    <link:label id="lab_ifrs-full_OtherAdjustmentsForNoncashItems_label_en-US" xlink:label="lab_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other adjustments for non-cash items</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherAdjustmentsForNoncashItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:to="lab_ifrs-full_OtherAdjustmentsForNoncashItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentLiabilities_15b9de9b-3903-4c09-a6ce-4c1fef10e8fd_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentLiabilities" xlink:to="lab_ifrs-full_CurrentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IssuedCapital_9db17114-6b27-4cc8-af4b-d0b6b53da24e_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share capital</link:label>
    <link:label id="lab_ifrs-full_IssuedCapital_label_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Issued capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssuedCapital" xlink:to="lab_ifrs-full_IssuedCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeAndOtherReceivablesAbstract_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherReceivablesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade and other receivables [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherReceivablesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherReceivablesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherReceivablesAbstract" xlink:to="lab_ifrs-full_TradeAndOtherReceivablesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_c94b31d9-f661-494f-ae47-b1d95c1f07d3_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of subsidiaries [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of subsidiaries [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:to="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Inventories_83ba6bd8-6717-47b0-a291-a2991bb0d540_terseLabel_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventories</link:label>
    <link:label id="lab_ifrs-full_Inventories_df825c7f-9ae5-44bd-ba76-7153f0cc9658_totalLabel_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total inventories</link:label>
    <link:label id="lab_ifrs-full_Inventories_label_en-US" xlink:label="lab_ifrs-full_Inventories" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current inventories</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Inventories" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Inventories"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Inventories" xlink:to="lab_ifrs-full_Inventories" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_3384c190-d94c-4a9f-acf0-104900845f3a_verboseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax assets</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred tax assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DeferredTaxAssets" xlink:to="lab_ifrs-full_DeferredTaxAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock_39fe1b32-e9d3-4ad1-9b32-5e888a2f1dcb_terseLabel_en-US" xlink:label="lab_argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of number of shares outstanding</link:label>
    <link:label id="lab_argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock_label_en-US" xlink:label="lab_argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reconciliation of number of shares outstanding [Table Text Block]</link:label>
    <link:label id="lab_argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock_documentation_en-US" xlink:label="lab_argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of issued capital.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock" xlink:href="argx-20260630.xsd#argx_ReconciliationOfNumberOfSharesOutstandingTableTextBlock"/>
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    <link:label id="lab_ifrs-full_SharePremium_37dc68ca-f5fa-47a7-bd8e-1ff969430b32_terseLabel_en-US" xlink:label="lab_ifrs-full_SharePremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share premium</link:label>
    <link:label id="lab_ifrs-full_SharePremium_label_en-US" xlink:label="lab_ifrs-full_SharePremium" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share premium</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharePremium" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharePremium"/>
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    <link:label id="lab_ifrs-full_CurrentTaxLiabilitiesCurrent_9c29555b-a57b-48f7-85be-f352927f8e9f_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Tax liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentTaxLiabilitiesCurrent_label_en-US" xlink:label="lab_ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current tax liabilities, current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:to="lab_ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_StatementOfProfitOrLossAndOtherComprehensiveIncomeAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfProfitOrLossAndOtherComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of profit or loss and other comprehensive income [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfProfitOrLossAndOtherComprehensiveIncomeAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfProfitOrLossAndOtherComprehensiveIncomeAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfProfitOrLossAndOtherComprehensiveIncomeAbstract" xlink:to="lab_ifrs-full_StatementOfProfitOrLossAndOtherComprehensiveIncomeAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_4ce6e190-382e-472d-b3f9-548ce86da3db_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of shares outstanding (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_e6f8bd9b-4253-4bd4-90f1-1146b7079c48_periodStartLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Number of shares outstanding at beginning of period (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_edbba466-ec70-4404-802a-82740f284d02_periodEndLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Number of shares outstanding at end of period (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesOutstanding_label_en-US" xlink:label="lab_ifrs-full_NumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of shares outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesOutstanding" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesOutstanding"/>
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    <link:label id="lab_argx_TermAccounts_629149d7-9eed-4104-a55a-5b2965cdb15a_terseLabel_en-US" xlink:label="lab_argx_TermAccounts" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term accounts</link:label>
    <link:label id="lab_argx_TermAccounts_label_en-US" xlink:label="lab_argx_TermAccounts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Term Accounts</link:label>
    <link:label id="lab_argx_TermAccounts_documentation_en-US" xlink:label="lab_argx_TermAccounts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of term accounts.</link:label>
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    <link:label id="lab_ifrs-full_OtherExpenseByFunction_fcc3aef2-6076-4be4-bae2-57d5bf02bcf0_verboseLabel_en-US" xlink:label="lab_ifrs-full_OtherExpenseByFunction" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other expenses</link:label>
    <link:label id="lab_ifrs-full_OtherExpenseByFunction_label_en-US" xlink:label="lab_ifrs-full_OtherExpenseByFunction" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other expense, by function</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherExpenseByFunction" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherExpenseByFunction"/>
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    <link:label id="lab_ifrs-full_StatementOfChangesInEquityAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of changes in equity [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfChangesInEquityAbstract" xlink:to="lab_ifrs-full_StatementOfChangesInEquityAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_8de9b1b3-53c5-48ad-b9ec-6362aa2bff0d_negatedLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Income tax expense</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_019efd32-cfb1-73ea-b7cb-f2744530b181_negatedTotalLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Income tax expense</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_label_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax expense (income)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
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    <link:label id="lab_ifrs-full_RetainedEarnings_824692be-a475-4705-b347-d399ee905d53_terseLabel_en-US" xlink:label="lab_ifrs-full_RetainedEarnings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained earnings/(accumulated losses)</link:label>
    <link:label id="lab_ifrs-full_RetainedEarnings_label_en-US" xlink:label="lab_ifrs-full_RetainedEarnings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained earnings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetainedEarnings" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetainedEarnings"/>
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    <link:label id="lab_argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales_4d9b7729-5c2d-4d4f-93fd-a517ef77cfbb_negatedTerseLabel_en-US" xlink:label="lab_argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Credits or payments</link:label>
    <link:label id="lab_argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales_label_en-US" xlink:label="lab_argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accruals, Decrease From Credit or Payments Related to Sales</link:label>
    <link:label id="lab_argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales_documentation_en-US" xlink:label="lab_argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of decrease in accruals from payment or credit from sales made during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales" xlink:href="argx-20260630.xsd#argx_AccrualsDecreaseFromCreditOrPaymentsRelatedToSales"/>
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    <link:label id="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_4e5f70b6-463c-4516-ba87-c3a6b262a4dd_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Events after the balance sheet date</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of events after reporting period [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory"/>
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    <link:label id="lab_argx_OtherResearchAndDevelopmentExpenses_12cc6ed1-5c9c-4f85-8fc8-b26bb4d82d24_terseLabel_en-US" xlink:label="lab_argx_OtherResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other expenses</link:label>
    <link:label id="lab_argx_OtherResearchAndDevelopmentExpenses_label_en-US" xlink:label="lab_argx_OtherResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Research And Development Expenses</link:label>
    <link:label id="lab_argx_OtherResearchAndDevelopmentExpenses_documentation_en-US" xlink:label="lab_argx_OtherResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents expenses incurred in research and development not separately disclosed.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_OtherResearchAndDevelopmentExpenses" xlink:href="argx-20260630.xsd#argx_OtherResearchAndDevelopmentExpenses"/>
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    <link:label id="lab_ifrs-full_WorkInProgress_24f3eb60-0d8b-47d1-9c14-8be25c6a1072_terseLabel_en-US" xlink:label="lab_ifrs-full_WorkInProgress" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventories in process</link:label>
    <link:label id="lab_ifrs-full_WorkInProgress_label_en-US" xlink:label="lab_ifrs-full_WorkInProgress" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current work in progress</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WorkInProgress" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WorkInProgress"/>
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    <link:label id="lab_argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability_829b3e5d-cd48-4ceb-99ac-c596b50eeb41_negatedLabel_en-US" xlink:label="lab_argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Ordinary shares withheld for payment of employees&#8217; withholding tax liability</link:label>
    <link:label id="lab_argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability_label_en-US" xlink:label="lab_argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Decrease Increase Through Shares Withheld for Employee Tax Holding Liability</link:label>
    <link:label id="lab_argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability_documentation_en-US" xlink:label="lab_argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ordinary shares withheld for payment of employees' withholding tax liability.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability" xlink:href="argx-20260630.xsd#argx_DecreaseIncreaseThroughSharesWithheldForEmployeeTaxHoldingLiability"/>
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    <link:label id="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_22704f71-5d2b-423b-989e-7077d3509d3a_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale of current financial assets</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from sales or maturity of financial instruments, classified as investing activities</link:label>
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    <link:label id="lab_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesTextBlock_019efc9d-3fbf-7d40-bfff-1603e663509b_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of preparation and changes to the Company's accounting policies</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesTextBlock" xlink:href="argx-20260630.xsd#argx_DisclosureOfBasisOfPreparationAndChangesInAccountingPoliciesTextBlock"/>
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    <link:label id="lab_dei_DocumentFiscalPeriodFocus_5b6a827d-621d-4bd4-a009-e61c85d0480e_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
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    <link:label id="lab_argx_RawMaterialsAndConsumablesUsedInResearchAndDevelopment_108df03c-bf8d-484b-a0ab-98f2de7dc7b0_terseLabel_en-US" xlink:label="lab_argx_RawMaterialsAndConsumablesUsedInResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Materials and consumables</link:label>
    <link:label id="lab_argx_RawMaterialsAndConsumablesUsedInResearchAndDevelopment_label_en-US" xlink:label="lab_argx_RawMaterialsAndConsumablesUsedInResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Raw Materials And Consumables Used In Research And Development</link:label>
    <link:label id="lab_argx_RawMaterialsAndConsumablesUsedInResearchAndDevelopment_documentation_en-US" xlink:label="lab_argx_RawMaterialsAndConsumablesUsedInResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents raw materials and consumables expenses incurred in the R&amp;D process.</link:label>
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    <link:label id="lab_ifrs-full_Assets_c10eda96-7c19-4e11-a323-134d5b7bdcd8_totalLabel_en-US" xlink:label="lab_ifrs-full_Assets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_ifrs-full_Assets_label_en-US" xlink:label="lab_ifrs-full_Assets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets_1a04bbe3-075d-4427-8d52-93605a4e4359_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, plant and equipment including right-of-use assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets"/>
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    <link:label id="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_d83bcf57-acc3-4c66-bcdd-f7c11793f4bb_verboseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Numbers of units granted in the year (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_label_en-US" xlink:label="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of other equity instruments granted in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted"/>
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    <link:label id="lab_ifrs-full_SellingGeneralAndAdministrativeExpense_00fd0a91-d731-4a06-bf56-e08841e8b003_negatedLabel_en-US" xlink:label="lab_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Selling, general and administrative expenses</link:label>
    <link:label id="lab_ifrs-full_SellingGeneralAndAdministrativeExpense_59a4bb6f-ac2e-49d8-bc82-5b23f432a292_totalLabel_en-US" xlink:label="lab_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total selling, general and administrative expenses</link:label>
    <link:label id="lab_ifrs-full_SellingGeneralAndAdministrativeExpense_label_en-US" xlink:label="lab_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selling, general and administrative expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SellingGeneralAndAdministrativeExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SellingGeneralAndAdministrativeExpense"/>
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    <link:label id="lab_dei_DocumentPeriodEndDate_5573c056-be40-4be1-8a1c-b69e79c1f607_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
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    <link:label id="lab_ifrs-full_CurrentTaxExpenseIncome_019efd32-cfb1-7912-923f-957cca0d4283_negatedLabel_en-US" xlink:label="lab_ifrs-full_CurrentTaxExpenseIncome" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Current income tax expense</link:label>
    <link:label id="lab_ifrs-full_CurrentTaxExpenseIncome_label_en-US" xlink:label="lab_ifrs-full_CurrentTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current tax expense (income)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxExpenseIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentTaxExpenseIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentTaxExpenseIncome" xlink:to="lab_ifrs-full_CurrentTaxExpenseIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_04df953b-077c-4c24-b207-cb7e8f939c5a_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exchange (losses)/gains</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gains (losses) on exchange differences on translation of foreign operations, before tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:to="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_AccrualsIncreaseDecreaseFromPriorPeriodSales_3fe5961a-f8ac-4d85-ad83-3dbcb8c74fe1_terseLabel_en-US" xlink:label="lab_argx_AccrualsIncreaseDecreaseFromPriorPeriodSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment for prior year sales</link:label>
    <link:label id="lab_argx_AccrualsIncreaseDecreaseFromPriorPeriodSales_label_en-US" xlink:label="lab_argx_AccrualsIncreaseDecreaseFromPriorPeriodSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accruals Increase (Decrease) From Prior Period Sales</link:label>
    <link:label id="lab_argx_AccrualsIncreaseDecreaseFromPriorPeriodSales_documentation_en-US" xlink:label="lab_argx_AccrualsIncreaseDecreaseFromPriorPeriodSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of increase in accruals from prior period sales made during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_AccrualsIncreaseDecreaseFromPriorPeriodSales" xlink:href="argx-20260630.xsd#argx_AccrualsIncreaseDecreaseFromPriorPeriodSales"/>
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    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables_7710506d-757f-49b2-aaba-24374c41ec79_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">(Increase)/decrease in trade and other receivables</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments for decrease (increase) in trade and other receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables"/>
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    <link:label id="lab_argx_DisclosureOfGeneralInformationAboutCompanyTextBlock_3a386e10-90d6-4802-8bc6-f5aa7ecc384b_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfGeneralInformationAboutCompanyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General information about the company</link:label>
    <link:label id="lab_argx_DisclosureOfGeneralInformationAboutCompanyTextBlock_label_en-US" xlink:label="lab_argx_DisclosureOfGeneralInformationAboutCompanyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of general information about the company [text block]</link:label>
    <link:label id="lab_argx_DisclosureOfGeneralInformationAboutCompanyTextBlock_documentation_en-US" xlink:label="lab_argx_DisclosureOfGeneralInformationAboutCompanyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The entire disclosure for general information about the company.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfGeneralInformationAboutCompanyTextBlock" xlink:href="argx-20260630.xsd#argx_DisclosureOfGeneralInformationAboutCompanyTextBlock"/>
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    <link:label id="lab_ifrs-full_InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember_a126c8ba-cc81-405b-a3e7-f670eef87790_terseLabel_en-US" xlink:label="lab_ifrs-full_InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value movement on investment in equity instruments designated as FVTOCI</link:label>
    <link:label id="lab_ifrs-full_InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember_label_en-US" xlink:label="lab_ifrs-full_InvestmentsInEquityInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments in equity instruments designated at fair value through other comprehensive income [member]</link:label>
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    <link:label id="lab_ifrs-full_TopOfRangeMember_5be90d38-6289-4539-9cae-818229be557f_terseLabel_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_ifrs-full_TopOfRangeMember_label_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Top of range [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TopOfRangeMember" xlink:to="lab_ifrs-full_TopOfRangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_CashAndBankBalances_b71e3124-f82a-4b77-9f53-196d41e4cbc2_terseLabel_en-US" xlink:label="lab_argx_CashAndBankBalances" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and bank balances</link:label>
    <link:label id="lab_argx_CashAndBankBalances_label_en-US" xlink:label="lab_argx_CashAndBankBalances" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Bank Balances</link:label>
    <link:label id="lab_argx_CashAndBankBalances_documentation_en-US" xlink:label="lab_argx_CashAndBankBalances" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of cash and bank balances.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_CashAndBankBalances" xlink:href="argx-20260630.xsd#argx_CashAndBankBalances"/>
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    <link:label id="lab_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity_839d274f-44b4-42da-9e23-975823abd9bc_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Profit for the period</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Profit (loss), attributable to ordinary equity holders of parent entity, used in calculating basic earnings per share</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfFinancialInstrumentsAxis_db454a22-bd1b-4d45-87b1-72e5c6999069_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Classes of financial instruments [axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
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    <link:label id="lab_ifrs-full_ResearchAndDevelopmentExpense_f399b26d-d9d1-461f-a295-d52ed9458fc2_negatedLabel_en-US" xlink:label="lab_ifrs-full_ResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Research and development expenses</link:label>
    <link:label id="lab_ifrs-full_ResearchAndDevelopmentExpense_91db2358-b71a-4ee0-90fb-be305babdfa0_totalLabel_en-US" xlink:label="lab_ifrs-full_ResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total research and development expenses</link:label>
    <link:label id="lab_ifrs-full_ResearchAndDevelopmentExpense_label_en-US" xlink:label="lab_ifrs-full_ResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Research and development expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ResearchAndDevelopmentExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ResearchAndDevelopmentExpense"/>
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    <link:label id="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities_6847e8af-d4c1-444e-8c21-25989d231d5f_negatedLabel_en-US" xlink:label="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Interest paid</link:label>
    <link:label id="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest paid, classified as operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:to="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_198ab52a-4b56-4aa4-a0f9-27fecf2bec6a_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other non-current assets</link:label>
    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other non-current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherNoncurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherNoncurrentAssets" xlink:to="lab_ifrs-full_OtherNoncurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock_f71eee00-941a-4b6b-b80b-d24650c70e48_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selling, general and administrative expenses</link:label>
    <link:label id="lab_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock_label_en-US" xlink:label="lab_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Selling General and Administrative Expenses [Text Block]</link:label>
    <link:label id="lab_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock_documentation_en-US" xlink:label="lab_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The entire disclosure for selling, general and administrative expenses.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock" xlink:href="argx-20260630.xsd#argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock" xlink:to="lab_argx_DisclosureOfSellingGeneralAndAdministrativeExpensesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentType_d136aa4f-56e0-43cd-9983-1d41e19c3eeb_terseLabel_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_label_en-US" xlink:label="lab_dei_DocumentType" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_7fe5ba85-24ad-4d4e-a017-9631959e3c5c_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total share based payment expense</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_label_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expense from share-based payment transactions with employees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:to="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ProductOrServiceAxis_49653b76-26fe-4cf8-b6f4-a64c94b29d04_terseLabel_en-US" xlink:label="lab_srt_ProductOrServiceAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:label id="lab_srt_ProductOrServiceAxis_label_en-US" xlink:label="lab_srt_ProductOrServiceAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductOrServiceAxis" xlink:to="lab_srt_ProductOrServiceAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IssuedCapitalMember_5f418f43-32ac-41e4-84f8-c6283a0278b2_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share capital</link:label>
    <link:label id="lab_ifrs-full_IssuedCapitalMember_label_en-US" xlink:label="lab_ifrs-full_IssuedCapitalMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Issued capital [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapitalMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssuedCapitalMember" xlink:to="lab_ifrs-full_IssuedCapitalMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GeographicalAreasAxis_ce79bdb1-93ce-4045-b246-cd04ff4fcb16_terseLabel_en-US" xlink:label="lab_ifrs-full_GeographicalAreasAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical areas [axis]</link:label>
    <link:label id="lab_ifrs-full_GeographicalAreasAxis_label_en-US" xlink:label="lab_ifrs-full_GeographicalAreasAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical areas [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeographicalAreasAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GeographicalAreasAxis" xlink:to="lab_ifrs-full_GeographicalAreasAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfFinancialAssetsAxis_f654abde-146d-49cb-825e-0cc856b035d8_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Classes of financial assets [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfFinancialAssetsAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Classes of financial assets [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis" xlink:to="lab_ifrs-full_ClassesOfFinancialAssetsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract_85076d12-a548-47e0-b28e-a34842f8c1f2_terseLabel_en-US" xlink:label="lab_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Movements in non-current assets/liabilities</link:label>
    <link:label id="lab_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract_label_en-US" xlink:label="lab_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Movements in Non Current Assets or Liabilities [Abstract]</link:label>
    <link:label id="lab_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract_documentation_en-US" xlink:label="lab_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">n/a.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract" xlink:href="argx-20260630.xsd#argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract" xlink:to="lab_argx_MovementsInNonCurrentAssetsOrLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding_9020ab0c-d5a5-435e-a4f6-f1aed36b508d_verboseLabel_en-US" xlink:label="lab_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Exercise of stock options (in shares)</link:label>
    <link:label id="lab_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding_label_en-US" xlink:label="lab_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) Through Exercise Of Options, Number of Shares Outstanding</link:label>
    <link:label id="lab_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding_documentation_en-US" xlink:label="lab_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The increase (decrease) in number of shares outstanding resulting from the exercise of option's.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding" xlink:href="argx-20260630.xsd#argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding" xlink:to="lab_argx_IncreaseDecreaseThroughExerciseOfOptionsNumberOfSharesOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_EquityAttributableToOwnersOfParentAbstract_5b34c66f-7c7e-43f5-a27b-cb92e2917e90_terseLabel_en-US" xlink:label="lab_argx_EquityAttributableToOwnersOfParentAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity attributable to owners of the parent</link:label>
    <link:label id="lab_argx_EquityAttributableToOwnersOfParentAbstract_label_en-US" xlink:label="lab_argx_EquityAttributableToOwnersOfParentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Attributable To Owners Of Parent [Abstract]</link:label>
    <link:label id="lab_argx_EquityAttributableToOwnersOfParentAbstract_documentation_en-US" xlink:label="lab_argx_EquityAttributableToOwnersOfParentAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Equity Attributable To Owners Of Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_EquityAttributableToOwnersOfParentAbstract" xlink:href="argx-20260630.xsd#argx_EquityAttributableToOwnersOfParentAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_EquityAttributableToOwnersOfParentAbstract" xlink:to="lab_argx_EquityAttributableToOwnersOfParentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentLeaseLiabilities_f65c7360-e944-4555-8a82-96cb956cfc28_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease liabilities</link:label>
    <link:label id="lab_ifrs-full_NoncurrentLeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_NoncurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-current lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentLeaseLiabilities" xlink:to="lab_ifrs-full_NoncurrentLeaseLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_RestOfTheWorldMember_8db762f4-4741-4116-9f3d-fa2f19a3c1a9_terseLabel_en-US" xlink:label="lab_argx_RestOfTheWorldMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rest of the World</link:label>
    <link:label id="lab_argx_RestOfTheWorldMember_label_en-US" xlink:label="lab_argx_RestOfTheWorldMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rest Of The World [Member]</link:label>
    <link:label id="lab_argx_RestOfTheWorldMember_documentation_en-US" xlink:label="lab_argx_RestOfTheWorldMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rest Of The World</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_RestOfTheWorldMember" xlink:href="argx-20260630.xsd#argx_RestOfTheWorldMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_RestOfTheWorldMember" xlink:to="lab_argx_RestOfTheWorldMember" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_VestingDomain_e135c185-000c-43ab-bfb6-79184b1dcfc7_terseLabel_en-US" xlink:label="lab_argx_VestingDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting [Domain]</link:label>
    <link:label id="lab_argx_VestingDomain_label_en-US" xlink:label="lab_argx_VestingDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting [Domain]</link:label>
    <link:label id="lab_argx_VestingDomain_documentation_en-US" xlink:label="lab_argx_VestingDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vesting schedule for share-based compensation.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_VestingDomain" xlink:href="argx-20260630.xsd#argx_VestingDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_VestingDomain" xlink:to="lab_argx_VestingDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DistributionAndCommercialSupportExpenses_019efd2e-e7fb-74c0-8c8c-cb6f953d2e89_terseLabel_en-US" xlink:label="lab_argx_DistributionAndCommercialSupportExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distribution and commercial support expenses</link:label>
    <link:label id="lab_argx_DistributionAndCommercialSupportExpenses_label_en-US" xlink:label="lab_argx_DistributionAndCommercialSupportExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Distribution and Commercial Support Expenses</link:label>
    <link:label id="lab_argx_DistributionAndCommercialSupportExpenses_documentation_en-US" xlink:label="lab_argx_DistributionAndCommercialSupportExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Distribution and Commercial Support Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DistributionAndCommercialSupportExpenses" xlink:href="argx-20260630.xsd#argx_DistributionAndCommercialSupportExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DistributionAndCommercialSupportExpenses" xlink:to="lab_argx_DistributionAndCommercialSupportExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ExecutiveDirectorsMember_9c7d0d4a-63a5-4324-80bd-970956de5680_terseLabel_en-US" xlink:label="lab_argx_ExecutiveDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior management</link:label>
    <link:label id="lab_argx_ExecutiveDirectorsMember_label_en-US" xlink:label="lab_argx_ExecutiveDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior management</link:label>
    <link:label id="lab_argx_ExecutiveDirectorsMember_documentation_en-US" xlink:label="lab_argx_ExecutiveDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This member stands for executive directors.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ExecutiveDirectorsMember" xlink:href="argx-20260630.xsd#argx_ExecutiveDirectorsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_ExecutiveDirectorsMember" xlink:to="lab_argx_ExecutiveDirectorsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ShareBasedCompensationAwardTrancheTwoMember_81818d83-e308-4c17-8e14-ea42bf4498fb_terseLabel_en-US" xlink:label="lab_argx_ShareBasedCompensationAwardTrancheTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share based compensation award tranche two</link:label>
    <link:label id="lab_argx_ShareBasedCompensationAwardTrancheTwoMember_label_en-US" xlink:label="lab_argx_ShareBasedCompensationAwardTrancheTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Award Tranche Two [Member]</link:label>
    <link:label id="lab_argx_ShareBasedCompensationAwardTrancheTwoMember_documentation_en-US" xlink:label="lab_argx_ShareBasedCompensationAwardTrancheTwoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share Based Compensation Award Tranche Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ShareBasedCompensationAwardTrancheTwoMember" xlink:href="argx-20260630.xsd#argx_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_ShareBasedCompensationAwardTrancheTwoMember" xlink:to="lab_argx_ShareBasedCompensationAwardTrancheTwoMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_66cf00b8-4fd4-4570-b596-dbcc962b7c70_terseLabel_en-US" xlink:label="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]</link:label>
    <link:label id="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_label_en-US" xlink:label="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:to="lab_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_FutureMilestonePaymentsAllTargets_a207a24a-bf13-4e8f-a267-7884d83bf8bd_terseLabel_en-US" xlink:label="lab_argx_FutureMilestonePaymentsAllTargets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Future milestone payments</link:label>
    <link:label id="lab_argx_FutureMilestonePaymentsAllTargets_label_en-US" xlink:label="lab_argx_FutureMilestonePaymentsAllTargets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Future Milestone Payments All Targets</link:label>
    <link:label id="lab_argx_FutureMilestonePaymentsAllTargets_documentation_en-US" xlink:label="lab_argx_FutureMilestonePaymentsAllTargets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of future milestone payments too be made for all targets.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_FutureMilestonePaymentsAllTargets" xlink:href="argx-20260630.xsd#argx_FutureMilestonePaymentsAllTargets"/>
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    <link:label id="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities_019f617f-841f-7e1e-9f96-e2aede3fb89f_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchase of other non-current assets</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Purchase of other long-term assets, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities"/>
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    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_d27e5bd1-375e-4b0f-9e67-db114d97ef0e_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intangible assets</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill"/>
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    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_83176dfd-e614-46fc-9154-2dba03f8026d_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Types of share-based payment arrangements</link:label>
    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_label_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Types of share-based payment arrangements [domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:to="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DisclosureOfMajorComponentsOfTaxExpenseIncomeTableTextBlock_019f4719-d73c-7d6a-b646-1f62f2b0c5fe_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfMajorComponentsOfTaxExpenseIncomeTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of income tax expense</link:label>
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    <link:label id="lab_ifrs-full_TradeReceivablesMember_a85332e7-e4a8-49f4-a839-0dac6b7b9bef_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeReceivablesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables</link:label>
    <link:label id="lab_ifrs-full_TradeReceivablesMember_label_en-US" xlink:label="lab_ifrs-full_TradeReceivablesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade receivables [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember"/>
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    <link:label id="lab_ifrs-full_EarningsPerShareAbstract_d94f7c27-7177-4ea7-9e23-a2a1cda4a4aa_terseLabel_en-US" xlink:label="lab_ifrs-full_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings per share [abstract]</link:label>
    <link:label id="lab_ifrs-full_EarningsPerShareAbstract_label_en-US" xlink:label="lab_ifrs-full_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings per share [abstract]</link:label>
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    <link:label id="lab_ifrs-full_RangeAxis_c73f1ab1-3270-4119-b9e2-a1ea363eea0e_terseLabel_en-US" xlink:label="lab_ifrs-full_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range [axis]</link:label>
    <link:label id="lab_ifrs-full_RangeAxis_label_en-US" xlink:label="lab_ifrs-full_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RangeAxis" xlink:to="lab_ifrs-full_RangeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashAndCashEquivalents_57757f46-620b-447f-b7d1-335bd4864e34_terseLabel_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_CashAndCashEquivalents_a3565638-037a-47be-bb6f-4661a8df0a52_periodStartLabel_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at the beginning of the period</link:label>
    <link:label id="lab_ifrs-full_CashAndCashEquivalents_ef6b9e53-04e9-49c0-abe2-ec13082f3894_periodEndLabel_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at the end of the period</link:label>
    <link:label id="lab_ifrs-full_CashAndCashEquivalents_1b4fbdbd-f3bf-4523-9d4e-c8338a6eb5d8_totalLabel_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_CashAndCashEquivalents_label_en-US" xlink:label="lab_ifrs-full_CashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalents" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalents"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashAndCashEquivalents" xlink:to="lab_ifrs-full_CashAndCashEquivalents" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_GrantAwardDateAxis_019f470a-a4cc-7c4a-a461-42b778fe8680_terseLabel_en-US" xlink:label="lab_argx_GrantAwardDateAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Grant Award Date [Axis]</link:label>
    <link:label id="lab_argx_GrantAwardDateAxis_label_en-US" xlink:label="lab_argx_GrantAwardDateAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Grant Award Date [Axis]</link:label>
    <link:label id="lab_argx_GrantAwardDateAxis_documentation_en-US" xlink:label="lab_argx_GrantAwardDateAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Grant Award Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_GrantAwardDateAxis" xlink:href="argx-20260630.xsd#argx_GrantAwardDateAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_GrantAwardDateAxis" xlink:to="lab_argx_GrantAwardDateAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComponentsOfEquityAxis_f3286ed4-f492-4ae2-973f-39f6905f3f1a_terseLabel_en-US" xlink:label="lab_ifrs-full_ComponentsOfEquityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Components of equity [axis]</link:label>
    <link:label id="lab_ifrs-full_ComponentsOfEquityAxis_label_en-US" xlink:label="lab_ifrs-full_ComponentsOfEquityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Components of equity [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis" xlink:to="lab_ifrs-full_ComponentsOfEquityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsLineItems_2ea3e5c9-1bf8-4e43-a498-9760c03972bb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfReconciliationOfChangesInLossAllowanceAndExplanationOfChangesInGrossCarryingAmountForFinancialInstrumentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]</link:label>
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    <link:label id="lab_ifrs-full_RestrictedShareUnitsMember_019f652d-00cc-797a-a7c2-799d6ef3c63d_terseLabel_en-US" xlink:label="lab_ifrs-full_RestrictedShareUnitsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted stock units (RSUs)</link:label>
    <link:label id="lab_ifrs-full_RestrictedShareUnitsMember_label_en-US" xlink:label="lab_ifrs-full_RestrictedShareUnitsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted share units [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RestrictedShareUnitsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RestrictedShareUnitsMember"/>
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    <link:label id="lab_argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage_932b9fd7-16c6-428f-aefe-4c64d959a81b_terseLabel_en-US" xlink:label="lab_argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum upside payout percentage</link:label>
    <link:label id="lab_argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage_label_en-US" xlink:label="lab_argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-Based Payment Agreement, Maximum Upside Payout Percentage</link:label>
    <link:label id="lab_argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage_documentation_en-US" xlink:label="lab_argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-Based Payment Agreement, Maximum Upside Payout Percentage</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage" xlink:href="argx-20260630.xsd#argx_ShareBasedPaymentAgreementMaximumUpsidePayoutPercentage"/>
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    <link:label id="lab_argx_CommitmentsTable_d2fce6cd-8db1-4628-96cc-6e29999e1e23_terseLabel_en-US" xlink:label="lab_argx_CommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments [Table]</link:label>
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    <link:label id="lab_argx_CommitmentsTable_documentation_en-US" xlink:label="lab_argx_CommitmentsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of information about obligations resulting from commitments.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_CommitmentsTable" xlink:href="argx-20260630.xsd#argx_CommitmentsTable"/>
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    <link:label id="lab_srt_ChiefExecutiveOfficerMember_019f616e-7604-71c8-b738-3fb70e557022_terseLabel_en-US" xlink:label="lab_srt_ChiefExecutiveOfficerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CEO</link:label>
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    <link:label id="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_6408c46d-ecb5-4fa8-9dba-5b7c9570c89d_verboseLabel_en-US" xlink:label="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Exercise price (in USD per share)</link:label>
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    <link:label id="lab_ifrs-full_CurrentPrepaidExpenses_c4c4d13c-78ab-4aeb-ad91-41a90e3f5e1b_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentPrepaidExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses</link:label>
    <link:label id="lab_ifrs-full_CurrentPrepaidExpenses_label_en-US" xlink:label="lab_ifrs-full_CurrentPrepaidExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current prepaid expenses</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentPrepaidExpenses" xlink:to="lab_ifrs-full_CurrentPrepaidExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslation_27ace0ff-7edf-482c-afd8-5ba157ef2944_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Translation differences</link:label>
    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslation_label_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reserve of exchange differences on translation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:to="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfitLossBeforeTax_c212b6df-917e-450e-93cf-baa86d125740_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossBeforeTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Profit for the period before taxes</link:label>
    <link:label id="lab_ifrs-full_ProfitLossBeforeTax_label_en-US" xlink:label="lab_ifrs-full_ProfitLossBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Profit (loss) before tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossBeforeTax" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossBeforeTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLossBeforeTax" xlink:to="lab_ifrs-full_ProfitLossBeforeTax" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities_42d29a1a-7224-45f5-80f8-0086f71ebbd3_negatedLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Income taxes paid</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income taxes paid (refund), classified as operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities"/>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncome_57cdf796-bcf7-454b-89d4-979f97851c2f_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income/(loss), net of income tax</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncome_df9279b4-1bbb-4a41-aec2-7b79a6d77215_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income or loss</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncome_label_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other comprehensive income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherComprehensiveIncome" xlink:to="lab_ifrs-full_OtherComprehensiveIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AssetsAbstract_9357ba18-8706-4464-8453-b82437d3a5fb_verboseLabel_en-US" xlink:label="lab_ifrs-full_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_ifrs-full_AssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AssetsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AssetsAbstract"/>
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    <link:label id="lab_ifrs-full_CounterpartiesDomain_22ab9156-174f-4166-a7ca-c89bee51b04d_terseLabel_en-US" xlink:label="lab_ifrs-full_CounterpartiesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparties [domain]</link:label>
    <link:label id="lab_ifrs-full_CounterpartiesDomain_label_en-US" xlink:label="lab_ifrs-full_CounterpartiesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparties [domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CounterpartiesDomain" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CounterpartiesDomain" xlink:to="lab_ifrs-full_CounterpartiesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityAndLiabilities_47129a9b-0969-47fd-8154-24c197fc7459_totalLabel_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total equity and liabilities</link:label>
    <link:label id="lab_ifrs-full_EquityAndLiabilities_label_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity and liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAndLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAndLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAndLiabilities" xlink:to="lab_ifrs-full_EquityAndLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_country_US_989f5668-fda0-4589-95d2-3e2176b6423e_terseLabel_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">United States</link:label>
    <link:label id="lab_country_US_label_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UNITED STATES</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_US" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_US" xlink:to="lab_country_US" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_019f4717-185e-76e9-b74a-8c8f4d1b3b8e_totalLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Increase in cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (decrease) in cash and cash equivalents before effect of exchange rate changes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges"/>
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    <link:label id="lab_argx_RebatesAndChargeBacksMember_40a81187-ec6c-4f0a-a92c-051e759af399_terseLabel_en-US" xlink:label="lab_argx_RebatesAndChargeBacksMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rebates and chargebacks</link:label>
    <link:label id="lab_argx_RebatesAndChargeBacksMember_label_en-US" xlink:label="lab_argx_RebatesAndChargeBacksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rebates And Charge Backs [Member]</link:label>
    <link:label id="lab_argx_RebatesAndChargeBacksMember_documentation_en-US" xlink:label="lab_argx_RebatesAndChargeBacksMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This member stands for Rebates and Chargebacks.</link:label>
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    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_461244f6-4266-4bfb-8e8a-11cd4febd1ee_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:to="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTableTextBlock_dc9419c9-4cdf-4543-a378-1788c8045c2a_terseLabel_en-US" xlink:label="lab_argx_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of selling, general and administrative expenses</link:label>
    <link:label id="lab_argx_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTableTextBlock_label_en-US" xlink:label="lab_argx_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Detailed Information about Selling, General and Administrative Expenses [Table Text Block]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTableTextBlock" xlink:href="argx-20260630.xsd#argx_DisclosureOfDetailedInformationAboutSellingGeneralAndAdministrativeExpensesTableTextBlock"/>
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    <link:label id="lab_argx_FinancialAssetsCurrentAbstract_label_en-US" xlink:label="lab_argx_FinancialAssetsCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial assets - current [Abstract]</link:label>
    <link:label id="lab_argx_FinancialAssetsCurrentAbstract_documentation_en-US" xlink:label="lab_argx_FinancialAssetsCurrentAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financial assets - current [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_FinancialAssetsCurrentAbstract" xlink:href="argx-20260630.xsd#argx_FinancialAssetsCurrentAbstract"/>
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    <link:label id="lab_ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory_3d0db277-f28f-49d6-bf6d-59b2a748ce1b_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share capital and share premium</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of share capital, reserves and other equity interest [text block]</link:label>
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    <link:label id="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_64d65be0-03d6-40c0-8a5f-1d7a921877bc_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share price (in USD per share)</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted average share price, share options granted</link:label>
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    <link:label id="lab_argx_AdjustmentsForDecreaseIncreaseInOtherNonCurrentAssets_6a2df373-7236-4272-8b5f-80cdac13cc32_terseLabel_en-US" xlink:label="lab_argx_AdjustmentsForDecreaseIncreaseInOtherNonCurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">(Increase)/decrease in other non&#8209;current assets</link:label>
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    <link:label id="lab_argx_AdjustmentsForDecreaseIncreaseInOtherNonCurrentAssets_documentation_en-US" xlink:label="lab_argx_AdjustmentsForDecreaseIncreaseInOtherNonCurrentAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Adjustments for decrease (increase) in other non current assets to reconcile profit (loss) to net cash flow from (used in) operating activities.</link:label>
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    <link:label id="lab_ifrs-full_CurrentAssetsAbstract_5bb27b47-a699-4953-bacf-6fc83eb1ed84_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current assets</link:label>
    <link:label id="lab_ifrs-full_CurrentAssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_CurrentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAssetsAbstract"/>
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    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_6e1dd4ad-430c-4115-be62-d16b7525e0fc_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of subsidiaries [line items]</link:label>
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    <link:label id="lab_argx_DigitalTechnologyExpensesClassifiedAsSellingGeneralAndAdministrativeExpenses_019efd2d-4297-71e3-810a-2db95eed79d9_terseLabel_en-US" xlink:label="lab_argx_DigitalTechnologyExpensesClassifiedAsSellingGeneralAndAdministrativeExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Digital technology expenses</link:label>
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    <link:label id="lab_argx_DepreciationAndAmortizationExpenseResearchAndDevelopment_c9abc1b7-dedb-41dd-ba55-aa8d250b5c3c_terseLabel_en-US" xlink:label="lab_argx_DepreciationAndAmortizationExpenseResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
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    <link:label id="lab_argx_DepreciationAndAmortizationExpenseResearchAndDevelopment_documentation_en-US" xlink:label="lab_argx_DepreciationAndAmortizationExpenseResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents depreciation and amortization of assets used in research and development.</link:label>
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    <link:label id="lab_ifrs-full_CapitalCommitmentsAbstract_label_en-US" xlink:label="lab_ifrs-full_CapitalCommitmentsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital commitments [abstract]</link:label>
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    <link:label id="lab_argx_MoneyMarketFunds_84616b75-29eb-41a2-b46f-1c523d136a34_terseLabel_en-US" xlink:label="lab_argx_MoneyMarketFunds" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Money market funds</link:label>
    <link:label id="lab_argx_MoneyMarketFunds_label_en-US" xlink:label="lab_argx_MoneyMarketFunds" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Money Market Funds</link:label>
    <link:label id="lab_argx_MoneyMarketFunds_documentation_en-US" xlink:label="lab_argx_MoneyMarketFunds" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of money market funds.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_MoneyMarketFunds" xlink:href="argx-20260630.xsd#argx_MoneyMarketFunds"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_MoneyMarketFunds" xlink:to="lab_argx_MoneyMarketFunds" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment_019efd28-68e9-7030-b3f1-7c385a4ca620_terseLabel_en-US" xlink:label="lab_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Digital technology expenses</link:label>
    <link:label id="lab_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment_label_en-US" xlink:label="lab_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Digital Technology Expenses Classified as Research and Development</link:label>
    <link:label id="lab_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment_documentation_en-US" xlink:label="lab_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Digital Technology Expenses Classified as Research and Development</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment" xlink:href="argx-20260630.xsd#argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment" xlink:to="lab_argx_DigitalTechnologyExpensesClassifiedAsResearchAndDevelopment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory_a0719b95-f6d5-4425-b682-807f46acea57_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade and other payables</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of trade and other payables [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherReserves_999ec2b1-0bf8-4e79-b2de-36dec60bd113_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherReserves" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other reserves</link:label>
    <link:label id="lab_ifrs-full_OtherReserves_label_en-US" xlink:label="lab_ifrs-full_OtherReserves" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other reserves</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherReserves" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherReserves"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherReserves" xlink:to="lab_ifrs-full_OtherReserves" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ReserveOfSharebasedPaymentsMember_0c1494df-67c9-4292-9445-8191ee82a746_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfSharebasedPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based payment and income tax deduction on share-based payments</link:label>
    <link:label id="lab_ifrs-full_ReserveOfSharebasedPaymentsMember_label_en-US" xlink:label="lab_ifrs-full_ReserveOfSharebasedPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reserve of share-based payments [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfSharebasedPaymentsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfSharebasedPaymentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReserveOfSharebasedPaymentsMember" xlink:to="lab_ifrs-full_ReserveOfSharebasedPaymentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_CommitmentsLineItems_0d9cd3a0-7503-4b7e-827d-11dc66f7d29c_terseLabel_en-US" xlink:label="lab_argx_CommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments [Line Items]</link:label>
    <link:label id="lab_argx_CommitmentsLineItems_label_en-US" xlink:label="lab_argx_CommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments [Line Items]</link:label>
    <link:label id="lab_argx_CommitmentsLineItems_documentation_en-US" xlink:label="lab_argx_CommitmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_CommitmentsLineItems" xlink:href="argx-20260630.xsd#argx_CommitmentsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_CommitmentsLineItems" xlink:to="lab_argx_CommitmentsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AccumulatedImpairmentMember_c7cc5241-8314-4592-80d5-8bba63a9845f_terseLabel_en-US" xlink:label="lab_ifrs-full_AccumulatedImpairmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected credit losses</link:label>
    <link:label id="lab_ifrs-full_AccumulatedImpairmentMember_label_en-US" xlink:label="lab_ifrs-full_AccumulatedImpairmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated impairment [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AccumulatedImpairmentMember" xlink:to="lab_ifrs-full_AccumulatedImpairmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory_6af7a8ef-bbc0-478f-8938-e610dd55b4ae_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related party transactions</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of related party [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfRelatedPartyExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:to="lab_ifrs-full_DisclosureOfRelatedPartyExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfFinancialAssetsDomain_71f2fed0-ce7e-43ac-b4ab-b4a512350fe7_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialAssetsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Classes of financial assets [domain]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfFinancialAssetsDomain_label_en-US" xlink:label="lab_ifrs-full_ClassesOfFinancialAssetsDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Classes of financial assets [domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsDomain" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain" xlink:to="lab_ifrs-full_ClassesOfFinancialAssetsDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_d8f9b548-8d31-4b8c-a40d-e34d7e34a347_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial assets - Current</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of financial instruments [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted_036dba7d-0886-4017-84f1-cef836f31c07_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Risk-free interest rate</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Risk free interest rate, share options granted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:to="lab_ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_c4d5cab3-d2ea-466e-8fba-6fe09678d5e0_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash flows (used in)/from investing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash flows from (used in) investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses_505d3a82-8e09-43d1-9cb8-e23bb68e7fbf_terseLabel_en-US" xlink:label="lab_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses_label_en-US" xlink:label="lab_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation And Amortization Expense Selling General and Administrative Expenses</link:label>
    <link:label id="lab_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses_documentation_en-US" xlink:label="lab_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents depreciation and amortization of assets used in Selling, general and administrative expenses.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses" xlink:href="argx-20260630.xsd#argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses" xlink:to="lab_argx_DepreciationAndAmortizationExpenseSellingGeneralAndAdministrativeExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract_b2cd6fdf-f691-41e7-a57e-f7318931a31f_terseLabel_en-US" xlink:label="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of number of shares outstanding [abstract]</link:label>
    <link:label id="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract_label_en-US" xlink:label="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reconciliation of number of shares outstanding [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract" xlink:to="lab_ifrs-full_ReconciliationOfNumberOfSharesOutstandingAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DisclosureOfResearchAndDevelopmentExpenseAbstract_label_en-US" xlink:label="lab_argx_DisclosureOfResearchAndDevelopmentExpenseAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Research and development expenses</link:label>
    <link:label id="lab_argx_DisclosureOfResearchAndDevelopmentExpenseAbstract_documentation_en-US" xlink:label="lab_argx_DisclosureOfResearchAndDevelopmentExpenseAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">N/A</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DisclosureOfResearchAndDevelopmentExpenseAbstract" xlink:href="argx-20260630.xsd#argx_DisclosureOfResearchAndDevelopmentExpenseAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DisclosureOfResearchAndDevelopmentExpenseAbstract" xlink:to="lab_argx_DisclosureOfResearchAndDevelopmentExpenseAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_9d027992-adcf-47e1-903f-69def3a02ef5_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based payments</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (decrease) through share-based payment transactions, equity</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_12ba662e-5958-48e1-864e-dde2f55d32a0_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash flows from financing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash flows from (used in) financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CounterpartiesAxis_19cb711d-60b1-405c-b01a-771e5b1b78bf_terseLabel_en-US" xlink:label="lab_ifrs-full_CounterpartiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparties [axis]</link:label>
    <link:label id="lab_ifrs-full_CounterpartiesAxis_label_en-US" xlink:label="lab_ifrs-full_CounterpartiesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparties [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CounterpartiesAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CounterpartiesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CounterpartiesAxis" xlink:to="lab_ifrs-full_CounterpartiesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_IncomeTaxesAbstract_label_en-US" xlink:label="lab_argx_IncomeTaxesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income taxes [Abstract]</link:label>
    <link:label id="lab_argx_IncomeTaxesAbstract_documentation_en-US" xlink:label="lab_argx_IncomeTaxesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">n/a</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_IncomeTaxesAbstract" xlink:href="argx-20260630.xsd#argx_IncomeTaxesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_IncomeTaxesAbstract" xlink:to="lab_argx_IncomeTaxesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_723975d0-4c6d-40b5-ad92-ca97505f3b80_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Currency translation differences, arisen from translating foreign activities</link:label>
    <link:label id="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_label_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other comprehensive income, net of tax, exchange differences on translation of foreign operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:to="lab_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentAssets_e6b29357-ea1a-494b-8047-38330137cb3a_totalLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total non&#8209;current assets</link:label>
    <link:label id="lab_ifrs-full_NoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_NoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentAssets" xlink:to="lab_ifrs-full_NoncurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ExternalResearchAndDevelopmentExpenses_ebff42dc-5924-4f57-a4da-ef34ea261804_terseLabel_en-US" xlink:label="lab_argx_ExternalResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">External research and development expenses</link:label>
    <link:label id="lab_argx_ExternalResearchAndDevelopmentExpenses_label_en-US" xlink:label="lab_argx_ExternalResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">External Research and Development Expenses</link:label>
    <link:label id="lab_argx_ExternalResearchAndDevelopmentExpenses_documentation_en-US" xlink:label="lab_argx_ExternalResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of expenditure directly attributable to external research or development activities, recognized in profit or loss.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ExternalResearchAndDevelopmentExpenses" xlink:href="argx-20260630.xsd#argx_ExternalResearchAndDevelopmentExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_ExternalResearchAndDevelopmentExpenses" xlink:to="lab_argx_ExternalResearchAndDevelopmentExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentAssets_43efa702-250d-46cc-8b39-a523e02148f6_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current assets</link:label>
    <link:label id="lab_ifrs-full_CurrentAssets_label_en-US" xlink:label="lab_ifrs-full_CurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentAssets" xlink:to="lab_ifrs-full_CurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityTable_e4031b67-a360-45a7-b66b-96a8836c8a2a_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement of changes in equity [table]</link:label>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityTable_label_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of changes in equity [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable" xlink:to="lab_ifrs-full_StatementOfChangesInEquityTable" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement_019f2704-6ba6-756d-a98c-ea5ba9d9ea95_terseLabel_en-US" xlink:label="lab_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock options, exercise period (in years)</link:label>
    <link:label id="lab_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement_label_en-US" xlink:label="lab_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Term Of Options Granted For Share-Based Payment Arrangement</link:label>
    <link:label id="lab_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement_documentation_en-US" xlink:label="lab_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum Term Of Options Granted For Share-Based Payment Arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement" xlink:href="argx-20260630.xsd#argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement" xlink:to="lab_argx_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_country_JP_c227a668-2265-46bf-886c-c2a281878920_terseLabel_en-US" xlink:label="lab_country_JP" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Japan</link:label>
    <link:label id="lab_country_JP_label_en-US" xlink:label="lab_country_JP" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">JAPAN</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_country_JP" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_JP"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_JP" xlink:to="lab_country_JP" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock_019efcb5-9e9c-70f4-9b36-e0b9d41835ed_verboseLabel_en-US" xlink:label="lab_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">New standards, interpretations and amendments adopted by the Company</link:label>
    <link:label id="lab_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock_label_en-US" xlink:label="lab_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Description Of New Standards, Interpretations And Amendments [Policy Text Block]</link:label>
    <link:label id="lab_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock_documentation_en-US" xlink:label="lab_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Description Of New Standards, Interpretations And Amendments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock" xlink:href="argx-20260630.xsd#argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock" xlink:to="lab_argx_DescriptionOfNewStandardsInterpretationsAndAmendmentsPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_GeneralInformationAboutTheCompanyAbstract_label_en-US" xlink:label="lab_argx_GeneralInformationAboutTheCompanyAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">General information about the company [Abstract]</link:label>
    <link:label id="lab_argx_GeneralInformationAboutTheCompanyAbstract_documentation_en-US" xlink:label="lab_argx_GeneralInformationAboutTheCompanyAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">N/A</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_GeneralInformationAboutTheCompanyAbstract" xlink:href="argx-20260630.xsd#argx_GeneralInformationAboutTheCompanyAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_GeneralInformationAboutTheCompanyAbstract" xlink:to="lab_argx_GeneralInformationAboutTheCompanyAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory_5360497b-74ed-48c4-b1b9-88a1db7516f9_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade and other receivables</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of trade and other receivables [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod_5385ac18-5754-4380-ae2e-d5fc727d458e_terseLabel_en-US" xlink:label="lab_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting period</link:label>
    <link:label id="lab_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod_label_en-US" xlink:label="lab_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting Requirements For Share-Based Payment Arrangement, Vesting Period</link:label>
    <link:label id="lab_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod_documentation_en-US" xlink:label="lab_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vesting Requirements For Share-Based Payment Arrangement, Vesting Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod" xlink:href="argx-20260630.xsd#argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod" xlink:to="lab_argx_VestingRequirementsForShareBasedPaymentArrangementVestingPeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_PerformanceStockUnitsPSUsMember_ab639d8a-6063-4b9b-b244-c3c2d7a71ac0_terseLabel_en-US" xlink:label="lab_argx_PerformanceStockUnitsPSUsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Performance stock units (PSUs)</link:label>
    <link:label id="lab_argx_PerformanceStockUnitsPSUsMember_label_en-US" xlink:label="lab_argx_PerformanceStockUnitsPSUsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Performance Stock Units (PSUs) [Member]</link:label>
    <link:label id="lab_argx_PerformanceStockUnitsPSUsMember_documentation_en-US" xlink:label="lab_argx_PerformanceStockUnitsPSUsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Performance Stock Units (PSUs)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_PerformanceStockUnitsPSUsMember" xlink:href="argx-20260630.xsd#argx_PerformanceStockUnitsPSUsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_PerformanceStockUnitsPSUsMember" xlink:to="lab_argx_PerformanceStockUnitsPSUsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_078a353a-5857-47a3-b5f7-92f5b4518a87_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Adjustments for non-cash items</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash flows from (used in) operations before changes in working capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:to="lab_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfProductsAndServicesExplanatory_bd2cbe1c-893e-493c-be8e-4d30147c6b6d_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfProductsAndServicesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of product net sales by country of sales</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfProductsAndServicesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfProductsAndServicesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of products and services [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfProductsAndServicesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfProductsAndServicesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfProductsAndServicesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfProductsAndServicesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_currency_EUR_ea5b6f83-369e-4d4b-911c-6285c40fdf9c_terseLabel_en-US" xlink:label="lab_currency_EUR" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Euro</link:label>
    <link:label id="lab_currency_EUR_label_en-US" xlink:label="lab_currency_EUR" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Euro Member Countries, Euro</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_EUR"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_currency_EUR" xlink:to="lab_currency_EUR" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent_1017f2b1-c89e-4405-84c7-e5d1fb023c78_terseLabel_en-US" xlink:label="lab_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Research and development incentive receivables</link:label>
    <link:label id="lab_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent_label_en-US" xlink:label="lab_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Research and Development Incentive Receivables, Non Current</link:label>
    <link:label id="lab_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent_documentation_en-US" xlink:label="lab_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of research and development incentive receivables including tax incentives classified as non current.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent" xlink:href="argx-20260630.xsd#argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent" xlink:to="lab_argx_ResearchAndDevelopmentIncentiveReceivablesNonCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_TimePeriodToChooseDifferentContractualTerms_52d6bccb-944b-44e3-b99d-a03a5cb39f7b_terseLabel_en-US" xlink:label="lab_argx_TimePeriodToChooseDifferentContractualTerms" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Time period for beneficiaries to choose contractual term</link:label>
    <link:label id="lab_argx_TimePeriodToChooseDifferentContractualTerms_label_en-US" xlink:label="lab_argx_TimePeriodToChooseDifferentContractualTerms" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Period to Choose Different Contractual Terms</link:label>
    <link:label id="lab_argx_TimePeriodToChooseDifferentContractualTerms_documentation_en-US" xlink:label="lab_argx_TimePeriodToChooseDifferentContractualTerms" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Time period given to beneficiaries to choose different contractual term under share-based compensation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_TimePeriodToChooseDifferentContractualTerms" xlink:href="argx-20260630.xsd#argx_TimePeriodToChooseDifferentContractualTerms"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_TimePeriodToChooseDifferentContractualTerms" xlink:to="lab_argx_TimePeriodToChooseDifferentContractualTerms" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses_019efc5d-f699-7176-81aa-fc5776ebbc85_terseLabel_en-US" xlink:label="lab_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">(Increase)/decrease in current prepaid expenses</link:label>
    <link:label id="lab_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses_label_en-US" xlink:label="lab_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments for Decrease (Increase) in Current Prepaid Expenses</link:label>
    <link:label id="lab_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses_documentation_en-US" xlink:label="lab_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Adjustments for Decrease (Increase) in Current Prepaid Expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses" xlink:href="argx-20260630.xsd#argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses" xlink:to="lab_argx_AdjustmentsForDecreaseIncreaseInCurrentPrepaidExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses_061d62b0-21e2-4015-886a-63d6ac7c71ab_terseLabel_en-US" xlink:label="lab_argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Personnel expenses</link:label>
    <link:label id="lab_argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses_label_en-US" xlink:label="lab_argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Benefit Expenses Classified as Research and Development Expenses</link:label>
    <link:label id="lab_argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses_documentation_en-US" xlink:label="lab_argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment classified as research and development expenses.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses" xlink:href="argx-20260630.xsd#argx_EmployeeBenefitExpensesClassifiedAsResearchAndDevelopmentExpenses"/>
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    <link:label id="lab_argx_AccrualsForeignCurrencyTranslationAdjustment_4ef7a684-ee0e-440a-b822-d79115e10d71_terseLabel_en-US" xlink:label="lab_argx_AccrualsForeignCurrencyTranslationAdjustment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency translation differences</link:label>
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    <link:label id="lab_argx_AccrualsForeignCurrencyTranslationAdjustment_documentation_en-US" xlink:label="lab_argx_AccrualsForeignCurrencyTranslationAdjustment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accruals, Foreign Currency Translation Adjustment</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_7166ada5-3a7d-4f49-b9f8-917b400ad2db_verboseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Average expected option life (in years)</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Option life, share options granted</link:label>
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    <link:label id="lab_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_bca17c51-cf5a-421d-9fca-048ac84bb3b8_terseLabel_en-US" xlink:label="lab_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exchange (losses)/gains on cash&#160;and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_label_en-US" xlink:label="lab_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effect of exchange rate changes on cash and cash equivalents</link:label>
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    <link:label id="lab_ifrs-full_InterestReceivedClassifiedAsInvestingActivities_f0af8a2a-65d5-4489-a6e3-a05443624732_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestReceivedClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest received</link:label>
    <link:label id="lab_ifrs-full_InterestReceivedClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_InterestReceivedClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest received, classified as investing activities</link:label>
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    <link:label id="lab_ifrs-full_CostOfSales_f6f077b4-ed7f-4912-b320-e2238e16238f_negatedLabel_en-US" xlink:label="lab_ifrs-full_CostOfSales" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Cost of sales</link:label>
    <link:label id="lab_ifrs-full_CostOfSales_label_en-US" xlink:label="lab_ifrs-full_CostOfSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of sales</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSales" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CostOfSales"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CostOfSales" xlink:to="lab_ifrs-full_CostOfSales" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_04a66ad3-04d4-4c1e-aafe-13afdc3dd30f_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash flows from operating activities</link:label>
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    <link:label id="lab_dei_CurrentFiscalYearEndDate_0abc23cb-1054-496b-9475-7a8bb1a4806c_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate" xlink:to="lab_dei_CurrentFiscalYearEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinishedGoods_afc62547-3144-4870-bfea-e4ce48c53151_terseLabel_en-US" xlink:label="lab_ifrs-full_FinishedGoods" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finished goods</link:label>
    <link:label id="lab_ifrs-full_FinishedGoods_label_en-US" xlink:label="lab_ifrs-full_FinishedGoods" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current finished goods</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinishedGoods" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinishedGoods"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinishedGoods" xlink:to="lab_ifrs-full_FinishedGoods" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeAndOtherPayablesAbstract_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherPayablesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade and other payables [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherPayablesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherPayablesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherPayablesAbstract" xlink:to="lab_ifrs-full_TradeAndOtherPayablesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_bba09090-9163-4683-8617-9e67ad5d5dfe_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_GrantAwardDateDomain_019f470a-a4cc-75cb-8c13-5395efd32f48_terseLabel_en-US" xlink:label="lab_argx_GrantAwardDateDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Grant Award Date [Domain]</link:label>
    <link:label id="lab_argx_GrantAwardDateDomain_label_en-US" xlink:label="lab_argx_GrantAwardDateDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Grant Award Date [Domain]</link:label>
    <link:label id="lab_argx_GrantAwardDateDomain_documentation_en-US" xlink:label="lab_argx_GrantAwardDateDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Grant Award Date [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_GrantAwardDateDomain" xlink:href="argx-20260630.xsd#argx_GrantAwardDateDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_GrantAwardDateDomain" xlink:to="lab_argx_GrantAwardDateDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentLiabilitiesAbstract_a5505c93-a35a-4f43-bbe9-9033430cbd64_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-current liabilities</link:label>
    <link:label id="lab_ifrs-full_NoncurrentLiabilitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_NoncurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-current liabilities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract" xlink:to="lab_ifrs-full_NoncurrentLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_PrepaidExpensesNoncurrent_58f8026f-cb6e-49f4-b85e-8a91cddbcd5a_terseLabel_en-US" xlink:label="lab_argx_PrepaidExpensesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses</link:label>
    <link:label id="lab_argx_PrepaidExpensesNoncurrent_label_en-US" xlink:label="lab_argx_PrepaidExpensesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prepaid Expenses, Noncurrent</link:label>
    <link:label id="lab_argx_PrepaidExpensesNoncurrent_documentation_en-US" xlink:label="lab_argx_PrepaidExpensesNoncurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sum of the carrying amounts as of the balance sheet date of amounts paid in advance for expenses which will be charged against earnings in periods after one year or beyond the operating cycle, if longer.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_PrepaidExpensesNoncurrent" xlink:href="argx-20260630.xsd#argx_PrepaidExpensesNoncurrent"/>
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    <link:label id="lab_argx_HalozymeTherapeuticsIncMember_9523988a-476f-4b7d-917b-3c25cc095dde_terseLabel_en-US" xlink:label="lab_argx_HalozymeTherapeuticsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Halozyme</link:label>
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    <link:label id="lab_ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax_1b58afe1-fbf2-47b1-b6e6-884fb9d32eae_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax receivables</link:label>
    <link:label id="lab_ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax_label_en-US" xlink:label="lab_ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current receivables from taxes other than income tax</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory_774152a4-2fca-4642-ab89-d48c3fdf10df_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share based payments</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of share-based payment arrangements [text block]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_b110bcfc-1297-4958-94f4-e7c63438e328_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of transactions between related parties [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of transactions between related parties [table]</link:label>
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    <link:label id="lab_ifrs-full_MiscellaneousOtherOperatingIncome_9dff8059-651b-463f-a591-f0bc920686c6_terseLabel_en-US" xlink:label="lab_ifrs-full_MiscellaneousOtherOperatingIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other operating income</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentReceivables_b729e171-6212-463d-9edb-6b588dc87d2d_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade and other receivables</link:label>
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    <link:label id="lab_ifrs-full_CategoriesOfRelatedPartiesAxis_6ab28306-8b87-496f-b2bf-6dceed8e4880_terseLabel_en-US" xlink:label="lab_ifrs-full_CategoriesOfRelatedPartiesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Categories of related parties [axis]</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted_7cc3c3c5-eec3-49a9-81d6-a98bebd9f004_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected volatility (in percentage)</link:label>
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    <link:label id="lab_argx_WeightedAverageFairValueAtMeasurementDatePerShareOptionsGranted_documentation_en-US" xlink:label="lab_argx_WeightedAverageFairValueAtMeasurementDatePerShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Weighted average fair value at measurement date, per share options granted.</link:label>
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    <link:label id="lab_ifrs-full_ProfitLoss_12a556cf-995a-4ad8-8bb7-773e22222ff6_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Profit for the period</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfResearchAndDevelopmentExpenseExplanatory_4198d7d3-0d68-4483-ab2b-574d04d6f45c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfResearchAndDevelopmentExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Research and development expenses</link:label>
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    <link:label id="lab_ifrs-full_ComponentsOfEquityDomain_67e1b767-38c5-4871-ac16-00b96a1c2051_terseLabel_en-US" xlink:label="lab_ifrs-full_ComponentsOfEquityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Components of equity [domain]</link:label>
    <link:label id="lab_ifrs-full_ComponentsOfEquityDomain_label_en-US" xlink:label="lab_ifrs-full_ComponentsOfEquityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Components of equity [domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain" xlink:to="lab_ifrs-full_ComponentsOfEquityDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_53d883e3-80d5-43a2-970b-b76adc00cd67_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total equity attributable to owners of the parent</link:label>
    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_label_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity attributable to owners of parent [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="lab_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentLiabilities_eaa33d55-3066-4f78-b31d-3dedb25908bb_totalLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total non-current liabilities</link:label>
    <link:label id="lab_ifrs-full_NoncurrentLiabilities_label_en-US" xlink:label="lab_ifrs-full_NoncurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-current liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentLiabilities" xlink:to="lab_ifrs-full_NoncurrentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinanceCosts_8fa7dc21-73ee-4b7f-8e0d-bd5dfdb3bacc_negatedLabel_en-US" xlink:label="lab_ifrs-full_FinanceCosts" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Financial expense</link:label>
    <link:label id="lab_ifrs-full_FinanceCosts_label_en-US" xlink:label="lab_ifrs-full_FinanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinanceCosts" xlink:to="lab_ifrs-full_FinanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent_bfecb935-37d1-4163-bbdb-6deafaf3c534_terseLabel_en-US" xlink:label="lab_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Research and development incentive receivables</link:label>
    <link:label id="lab_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent_label_en-US" xlink:label="lab_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Research and Development Incentive Receivables, Current</link:label>
    <link:label id="lab_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent_documentation_en-US" xlink:label="lab_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of research and development incentive receivables including tax incentives classified as current.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent" xlink:href="argx-20260630.xsd#argx_ResearchAndDevelopmentIncentiveReceivablesCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent" xlink:to="lab_argx_ResearchAndDevelopmentIncentiveReceivablesCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_BelgianTaxedBeneficiariesMember_042c91af-502b-44e7-855e-64727368eb6e_terseLabel_en-US" xlink:label="lab_argx_BelgianTaxedBeneficiariesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Belgian taxed beneficiaries</link:label>
    <link:label id="lab_argx_BelgianTaxedBeneficiariesMember_label_en-US" xlink:label="lab_argx_BelgianTaxedBeneficiariesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Belgian Taxed Beneficiaries [Member]</link:label>
    <link:label id="lab_argx_BelgianTaxedBeneficiariesMember_documentation_en-US" xlink:label="lab_argx_BelgianTaxedBeneficiariesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This member stands for Belgian Taxed Beneficiaries.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_BelgianTaxedBeneficiariesMember" xlink:href="argx-20260630.xsd#argx_BelgianTaxedBeneficiariesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_BelgianTaxedBeneficiariesMember" xlink:to="lab_argx_BelgianTaxedBeneficiariesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_b59f58b7-f9a3-4b9a-92e7-0a15ca932dd6_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment reporting</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of entity's operating segments [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RevenueAndOperatingIncome_d1c69ce3-9560-41c2-8ab8-c579f4a3b619_totalLabel_en-US" xlink:label="lab_ifrs-full_RevenueAndOperatingIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total operating income</link:label>
    <link:label id="lab_ifrs-full_RevenueAndOperatingIncome_label_en-US" xlink:label="lab_ifrs-full_RevenueAndOperatingIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue and other operating income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueAndOperatingIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueAndOperatingIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RevenueAndOperatingIncome" xlink:to="lab_ifrs-full_RevenueAndOperatingIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_VestingRightAxis_99743beb-9665-49f6-a009-fc9fd1db6c45_terseLabel_en-US" xlink:label="lab_argx_VestingRightAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting [Axis]</link:label>
    <link:label id="lab_argx_VestingRightAxis_label_en-US" xlink:label="lab_argx_VestingRightAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting Right [Axis]</link:label>
    <link:label id="lab_argx_VestingRightAxis_documentation_en-US" xlink:label="lab_argx_VestingRightAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Information by vesting schedule for share-based compensation.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_VestingRightAxis" xlink:href="argx-20260630.xsd#argx_VestingRightAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_VestingRightAxis" xlink:to="lab_argx_VestingRightAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RangeDomain_8ae45220-edec-4085-aed0-392c0b53000d_terseLabel_en-US" xlink:label="lab_ifrs-full_RangeDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range [domain]</link:label>
    <link:label id="lab_ifrs-full_RangeDomain_label_en-US" xlink:label="lab_ifrs-full_RangeDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RangeDomain" xlink:to="lab_ifrs-full_RangeDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CapitalCommitments_0b17a898-833e-40b7-b0f1-f782fda765f0_terseLabel_en-US" xlink:label="lab_ifrs-full_CapitalCommitments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding commitment</link:label>
    <link:label id="lab_ifrs-full_CapitalCommitments_label_en-US" xlink:label="lab_ifrs-full_CapitalCommitments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital commitments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CapitalCommitments" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CapitalCommitments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CapitalCommitments" xlink:to="lab_ifrs-full_CapitalCommitments" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses_5b6cefbf-1a17-459e-9515-bf5ee3d09b57_terseLabel_en-US" xlink:label="lab_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Personnel expenses</link:label>
    <link:label id="lab_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses_label_en-US" xlink:label="lab_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Benefit Expenses Classified as General and Administrative Expenses</link:label>
    <link:label id="lab_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses_documentation_en-US" xlink:label="lab_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment classified as general and administrative expenses.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses" xlink:href="argx-20260630.xsd#argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses" xlink:to="lab_argx_EmployeeBenefitExpensesClassifiedAsGeneralAndAdministrativeExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates_65998045-6fd5-4e76-bf6a-046988690730_terseLabel_en-US" xlink:label="lab_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of product net sales from major customers from United States</link:label>
    <link:label id="lab_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates_label_en-US" xlink:label="lab_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Of Entity Revenue From Major Customers From United States</link:label>
    <link:label id="lab_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates_documentation_en-US" xlink:label="lab_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage of the entity's revenue. from major customers from United States.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates" xlink:href="argx-20260630.xsd#argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates" xlink:to="lab_argx_PercentageOfEntityRevenueFromMajorCustomersFromUnitedStates" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RetainedEarningsMember_12894ef5-3227-4bb0-b877-7419b2578ba4_terseLabel_en-US" xlink:label="lab_ifrs-full_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained earnings/(accumulated losses)</link:label>
    <link:label id="lab_ifrs-full_RetainedEarningsMember_label_en-US" xlink:label="lab_ifrs-full_RetainedEarningsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained earnings [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetainedEarningsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetainedEarningsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RetainedEarningsMember" xlink:to="lab_ifrs-full_RetainedEarningsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_DirectorMember_019f477d-d5ba-73a3-a714-feeaf28c9a10_terseLabel_en-US" xlink:label="lab_srt_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Executive directors</link:label>
    <link:label id="lab_srt_DirectorMember_label_en-US" xlink:label="lab_srt_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Director [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_DirectorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_DirectorMember" xlink:to="lab_srt_DirectorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables_17d60699-55f6-4159-b0b3-3ea8d3308b04_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase/(decrease) in trade and other payables</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments for increase (decrease) in trade and other payables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:to="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_056e0095-b6ad-4000-9730-7f930f6f8cc5_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade payables</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current trade payables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:to="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_37f256fa-1d5d-42f9-bd3f-61360b286236_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory_30617f91-ad22-4edb-8bd0-6d783f3ebd71_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of cash and cash equivalents [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfInventoriesAbstract_label_en-US" xlink:label="lab_ifrs-full_ClassesOfInventoriesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Classes of current inventories [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfInventoriesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfInventoriesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfInventoriesAbstract" xlink:to="lab_ifrs-full_ClassesOfInventoriesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_PercentageOfShareOptionsGrantedOfTotalShareOptions_019f642d-9c6a-7a30-a88c-ef4396ddaf83_terseLabel_en-US" xlink:label="lab_argx_PercentageOfShareOptionsGrantedOfTotalShareOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share options granted (as percent)</link:label>
    <link:label id="lab_argx_PercentageOfShareOptionsGrantedOfTotalShareOptions_label_en-US" xlink:label="lab_argx_PercentageOfShareOptionsGrantedOfTotalShareOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Share Options Granted of Total Share Options</link:label>
    <link:label id="lab_argx_PercentageOfShareOptionsGrantedOfTotalShareOptions_documentation_en-US" xlink:label="lab_argx_PercentageOfShareOptionsGrantedOfTotalShareOptions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of Share Options Granted of Total Share Options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_PercentageOfShareOptionsGrantedOfTotalShareOptions" xlink:href="argx-20260630.xsd#argx_PercentageOfShareOptionsGrantedOfTotalShareOptions"/>
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    <link:label id="lab_argx_SupervisoryBoardExpenses_916f11a5-a061-41b1-a514-2896587ad0df_terseLabel_en-US" xlink:label="lab_argx_SupervisoryBoardExpenses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supervisory board</link:label>
    <link:label id="lab_argx_SupervisoryBoardExpenses_label_en-US" xlink:label="lab_argx_SupervisoryBoardExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supervisory Board Expenses</link:label>
    <link:label id="lab_argx_SupervisoryBoardExpenses_documentation_en-US" xlink:label="lab_argx_SupervisoryBoardExpenses" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of fees paid or payable for supervisory board services.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_SupervisoryBoardExpenses" xlink:href="argx-20260630.xsd#argx_SupervisoryBoardExpenses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_SupervisoryBoardExpenses" xlink:to="lab_argx_SupervisoryBoardExpenses" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfessionalFeesExpense_119062ea-87c0-46c8-b8c4-9d18cbd2e116_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfessionalFeesExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Professional fees</link:label>
    <link:label id="lab_ifrs-full_ProfessionalFeesExpense_label_en-US" xlink:label="lab_ifrs-full_ProfessionalFeesExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Professional fees expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfessionalFeesExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfessionalFeesExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfessionalFeesExpense" xlink:to="lab_ifrs-full_ProfessionalFeesExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentTradeReceivables_543cb6e5-2230-4030-8f26-a3766dae8245_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTradeReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables</link:label>
    <link:label id="lab_ifrs-full_CurrentTradeReceivables_label_en-US" xlink:label="lab_ifrs-full_CurrentTradeReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current trade receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTradeReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentTradeReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentTradeReceivables" xlink:to="lab_ifrs-full_CurrentTradeReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_ShareBasedCompensationAwardTrancheOneMember_c6044c8e-60bb-4dd7-a700-7099f59e3302_terseLabel_en-US" xlink:label="lab_argx_ShareBasedCompensationAwardTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share based compensation award tranche one</link:label>
    <link:label id="lab_argx_ShareBasedCompensationAwardTrancheOneMember_label_en-US" xlink:label="lab_argx_ShareBasedCompensationAwardTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Award Tranche One [Member]</link:label>
    <link:label id="lab_argx_ShareBasedCompensationAwardTrancheOneMember_documentation_en-US" xlink:label="lab_argx_ShareBasedCompensationAwardTrancheOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share Based Compensation Award Tranche One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_ShareBasedCompensationAwardTrancheOneMember" xlink:href="argx-20260630.xsd#argx_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_argx_ShareBasedCompensationAwardTrancheOneMember" xlink:to="lab_argx_ShareBasedCompensationAwardTrancheOneMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfEarningsPerShareExplanatory_ba98e665-f7e6-48be-9cef-258711574062_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings per share</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfEarningsPerShareExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of earnings per share [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfEarningsPerShareExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:to="lab_ifrs-full_DisclosureOfEarningsPerShareExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToAbstract_72188b5c-6f9d-4aa5-a9b2-bbd2f257c9f0_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Profit for the period attributable to:</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToAbstract_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Profit (loss), attributable to [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLossAttributableToAbstract" xlink:to="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_LonzaAndFujifilmMember_019efd43-c84c-7ff1-ac98-460818966765_terseLabel_en-US" xlink:label="lab_argx_LonzaAndFujifilmMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lonza and Fujifilm</link:label>
    <link:label id="lab_argx_LonzaAndFujifilmMember_label_en-US" xlink:label="lab_argx_LonzaAndFujifilmMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lonza and Fujifilm [Member]</link:label>
    <link:label id="lab_argx_LonzaAndFujifilmMember_documentation_en-US" xlink:label="lab_argx_LonzaAndFujifilmMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lonza</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_LonzaAndFujifilmMember" xlink:href="argx-20260630.xsd#argx_LonzaAndFujifilmMember"/>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayables_bc880a7d-0a5f-433b-a906-0f4f026ef725_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade and other payables</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayables_39242ad2-c923-48ac-90aa-91be19b4d5fa_totalLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total trade and other payables</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayables_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trade and other current payables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayables" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables" xlink:to="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityAndLiabilitiesAbstract_e5ec9844-fa52-4d27-be5b-0aa5de3e25c6_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity and Liabilities</link:label>
    <link:label id="lab_ifrs-full_EquityAndLiabilitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity and liabilities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAndLiabilitiesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAndLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAndLiabilitiesAbstract" xlink:to="lab_ifrs-full_EquityAndLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfInventoriesExplanatory_fa40218d-fc70-4a6c-9e43-e4445c2dabfb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventories</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfInventoriesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of inventories [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfInventoriesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfInventoriesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CarryingAmountMember_457286d1-e5ab-4a13-a43a-628dc7e2a480_terseLabel_en-US" xlink:label="lab_ifrs-full_CarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying amount [member]</link:label>
    <link:label id="lab_ifrs-full_CarryingAmountMember_label_en-US" xlink:label="lab_ifrs-full_CarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Carrying amount [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CarryingAmountMember" xlink:to="lab_ifrs-full_CarryingAmountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SellingGeneralAndAdministrativeExpenseAbstract_label_en-US" xlink:label="lab_ifrs-full_SellingGeneralAndAdministrativeExpenseAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selling, general and administrative expense [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SellingGeneralAndAdministrativeExpenseAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SellingGeneralAndAdministrativeExpenseAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SellingGeneralAndAdministrativeExpenseAbstract" xlink:to="lab_ifrs-full_SellingGeneralAndAdministrativeExpenseAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfitLossFromOperatingActivities_ce521fb6-f434-4e63-b774-8f70d46fa232_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossFromOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Operating profit</link:label>
    <link:label id="lab_ifrs-full_ProfitLossFromOperatingActivities_cf56dfa8-1d8e-4b88-9d45-f4ae3ff7183f_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossFromOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating profit</link:label>
    <link:label id="lab_ifrs-full_ProfitLossFromOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_ProfitLossFromOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Profit (loss) from operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossFromOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossFromOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLossFromOperatingActivities" xlink:to="lab_ifrs-full_ProfitLossFromOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentLeaseLiabilities_3be377e8-8f6b-4252-839c-50d9d26325e7_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentLeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLeaseLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLeaseLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentLeaseLiabilities" xlink:to="lab_ifrs-full_CurrentLeaseLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherCurrentReceivables_34ce5f00-bbc5-4c03-bbd2-069c5e0aafad_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherCurrentReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other receivables</link:label>
    <link:label id="lab_ifrs-full_OtherCurrentReceivables_label_en-US" xlink:label="lab_ifrs-full_OtherCurrentReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other current receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCurrentReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCurrentReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherCurrentReceivables" xlink:to="lab_ifrs-full_OtherCurrentReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_CurrencyAxis_5ed896f2-f17a-4877-8813-f33fa975b3aa_terseLabel_en-US" xlink:label="lab_srt_CurrencyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Currency [Axis]</link:label>
    <link:label id="lab_srt_CurrencyAxis_label_en-US" xlink:label="lab_srt_CurrencyAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Currency [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CurrencyAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CurrencyAxis" xlink:to="lab_srt_CurrencyAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_e5f4fa69-e6e7-4096-9b4e-4f0d9e4e3afe_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">(Increase)/decrease in inventories</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments for decrease (increase) in inventories</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:to="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems_a6599f17-60e3-4d54-94c3-0bfc615a2c8f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of financial assets [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of financial assets [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract" xlink:to="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod_019f26fb-4b0f-7acd-85bb-e94f2849427a_terseLabel_en-US" xlink:label="lab_argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Performance period (in years)</link:label>
    <link:label id="lab_argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod_label_en-US" xlink:label="lab_argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Performance Requirements For Share-Based Payment Arrangement, Performance Period</link:label>
    <link:label id="lab_argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod_documentation_en-US" xlink:label="lab_argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Performance Requirements For Share-Based Payment Arrangement, Performance Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod" xlink:href="argx-20260630.xsd#argx_PerformanceRequirementsForShareBasedPaymentArrangementPerformancePeriod"/>
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    <link:label id="lab_argx_DistributionFeesAndProductReturnsMember_78bf9940-6fda-42bf-970d-0036df6de70f_terseLabel_en-US" xlink:label="lab_argx_DistributionFeesAndProductReturnsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distribution fees and product returns</link:label>
    <link:label id="lab_argx_DistributionFeesAndProductReturnsMember_label_en-US" xlink:label="lab_argx_DistributionFeesAndProductReturnsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Distribution Fees And Product Returns [Member]</link:label>
    <link:label id="lab_argx_DistributionFeesAndProductReturnsMember_documentation_en-US" xlink:label="lab_argx_DistributionFeesAndProductReturnsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This member stands for Distribution fees, product returns and other.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_DistributionFeesAndProductReturnsMember" xlink:href="argx-20260630.xsd#argx_DistributionFeesAndProductReturnsMember"/>
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    <link:label id="lab_ifrs-full_DilutedEarningsLossPerShare_e220e18f-e3ee-4dbe-8f0e-218eb9fa6a24_terseLabel_en-US" xlink:label="lab_ifrs-full_DilutedEarningsLossPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted profit per share (in USD per share)</link:label>
    <link:label id="lab_ifrs-full_DilutedEarningsLossPerShare_label_en-US" xlink:label="lab_ifrs-full_DilutedEarningsLossPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Diluted earnings (loss) per share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutedEarningsLossPerShare" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DilutedEarningsLossPerShare"/>
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    <link:label id="lab_argx_A20242025GrantsMember_019f470c-5395-72eb-9446-d9d73964160e_terseLabel_en-US" xlink:label="lab_argx_A20242025GrantsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024 &amp; 2025 Grants</link:label>
    <link:label id="lab_argx_A20242025GrantsMember_label_en-US" xlink:label="lab_argx_A20242025GrantsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">2024 &amp; 2025 Grants [Member]</link:label>
    <link:label id="lab_argx_A20242025GrantsMember_documentation_en-US" xlink:label="lab_argx_A20242025GrantsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2024 &amp; 2025 Grants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_A20242025GrantsMember" xlink:href="argx-20260630.xsd#argx_A20242025GrantsMember"/>
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    <link:label id="lab_ifrs-full_NoncurrentProvisionsForEmployeeBenefits_ddd153f2-1083-4240-a39a-33416772e479_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentProvisionsForEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provisions for employee benefits</link:label>
    <link:label id="lab_ifrs-full_NoncurrentProvisionsForEmployeeBenefits_label_en-US" xlink:label="lab_ifrs-full_NoncurrentProvisionsForEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-current provisions for employee benefits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentProvisionsForEmployeeBenefits" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentProvisionsForEmployeeBenefits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentProvisionsForEmployeeBenefits" xlink:to="lab_ifrs-full_NoncurrentProvisionsForEmployeeBenefits" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_1a6d6a41-2144-4858-adde-e6bdd4f61d0d_negatedLabel_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Principal elements of lease payments</link:label>
    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of lease liabilities, classified as financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:to="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_NumberOfMajorCustomersFromUnitedStates_0575226a-78b3-4b8a-af6b-14b421415073_terseLabel_en-US" xlink:label="lab_argx_NumberOfMajorCustomersFromUnitedStates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of major customers from U.S.</link:label>
    <link:label id="lab_argx_NumberOfMajorCustomersFromUnitedStates_label_en-US" xlink:label="lab_argx_NumberOfMajorCustomersFromUnitedStates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of major customers from United States</link:label>
    <link:label id="lab_argx_NumberOfMajorCustomersFromUnitedStates_documentation_en-US" xlink:label="lab_argx_NumberOfMajorCustomersFromUnitedStates" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of major customers from U.S.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_NumberOfMajorCustomersFromUnitedStates" xlink:href="argx-20260630.xsd#argx_NumberOfMajorCustomersFromUnitedStates"/>
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    <link:label id="lab_ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities_6fb31655-f2c5-460c-bf0c-8edfe401148d_negatedLabel_en-US" xlink:label="lab_ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Investment in a joint venture</link:label>
    <link:label id="lab_ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other cash payments to acquire interests in joint ventures, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCashPaymentsToAcquireInterestsInJointVenturesClassifiedAsInvestingActivities"/>
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    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_814139a6-1c9e-4d7d-b1cf-88fe1f9f7917_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RevenueFromSaleOfGoods_1616a8e9-a39a-4898-9b70-960450900ec2_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromSaleOfGoods" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Product net sales</link:label>
    <link:label id="lab_ifrs-full_RevenueFromSaleOfGoods_8415c192-7abd-41f7-90fc-bc32bda12e8e_verboseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromSaleOfGoods" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total product net sales</link:label>
    <link:label id="lab_ifrs-full_RevenueFromSaleOfGoods_label_en-US" xlink:label="lab_ifrs-full_RevenueFromSaleOfGoods" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from sale of goods</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromSaleOfGoods" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromSaleOfGoods"/>
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    <link:label id="lab_argx_AccrualsIncreaseFromSales_0e29b6fb-7328-4c0b-a9ce-aaadde88595a_terseLabel_en-US" xlink:label="lab_argx_AccrualsIncreaseFromSales" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current estimate related to the sales made in the current period</link:label>
    <link:label id="lab_argx_AccrualsIncreaseFromSales_label_en-US" xlink:label="lab_argx_AccrualsIncreaseFromSales" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accruals, Increase From Sales</link:label>
    <link:label id="lab_argx_AccrualsIncreaseFromSales_documentation_en-US" xlink:label="lab_argx_AccrualsIncreaseFromSales" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of increase in accruals from sales made during the period.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_AccrualsIncreaseFromSales" xlink:href="argx-20260630.xsd#argx_AccrualsIncreaseFromSales"/>
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    <link:label id="lab_argx_GranteeAwardStatusAxis_6094f2e4-db0f-40c7-80a1-c2ecc65aa7bd_terseLabel_en-US" xlink:label="lab_argx_GranteeAwardStatusAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Grantee Status [Axis]</link:label>
    <link:label id="lab_argx_GranteeAwardStatusAxis_label_en-US" xlink:label="lab_argx_GranteeAwardStatusAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Grantee Award Status [Axis]</link:label>
    <link:label id="lab_argx_GranteeAwardStatusAxis_documentation_en-US" xlink:label="lab_argx_GranteeAwardStatusAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Information by status of recipient to whom award is granted.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_GranteeAwardStatusAxis" xlink:href="argx-20260630.xsd#argx_GranteeAwardStatusAxis"/>
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    <link:label id="lab_ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment_beda52ed-bdc6-4c2e-881e-a0007cdeffaa_terseLabel_en-US" xlink:label="lab_ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments to acquire property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual commitments for acquisition of property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_ContractualCommitmentsForAcquisitionOfPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EarningsPerShareExplanatory_37008c20-dd87-4595-a6a7-42ac510c8bf9_terseLabel_en-US" xlink:label="lab_ifrs-full_EarningsPerShareExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings per share</link:label>
    <link:label id="lab_ifrs-full_EarningsPerShareExplanatory_label_en-US" xlink:label="lab_ifrs-full_EarningsPerShareExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings per share [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EarningsPerShareExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EarningsPerShareExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EarningsPerShareExplanatory" xlink:to="lab_ifrs-full_EarningsPerShareExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_argx_NonExecutiveDirectorMember_d171e5cc-887a-4106-b405-2a5ff45e338f_terseLabel_en-US" xlink:label="lab_argx_NonExecutiveDirectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-executive director</link:label>
    <link:label id="lab_argx_NonExecutiveDirectorMember_label_en-US" xlink:label="lab_argx_NonExecutiveDirectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Executive Director [Member]</link:label>
    <link:label id="lab_argx_NonExecutiveDirectorMember_documentation_en-US" xlink:label="lab_argx_NonExecutiveDirectorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-Executive Director</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_argx_NonExecutiveDirectorMember" xlink:href="argx-20260630.xsd#argx_NonExecutiveDirectorMember"/>
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    <link:label id="lab_dei_EntityRegistrantName_3c45f686-7d20-4c86-9881-f012b6c84e85_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
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