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    <link:loc xlink:type="locator" xlink:label="loc_ark_RemunerationVerseeAuxPorteursDeTitresSubordonnesADureeIndeterminee" xlink:href="ark-2025-12-31.xsd#ark_RemunerationVerseeAuxPorteursDeTitresSubordonnesADureeIndeterminee"/>
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    <link:loc xlink:type="locator" xlink:label="loc_ark_InformationsRelativesAuxIndicateursAlternatifsDePerformanceEtInformationSectorielleTextBlock" xlink:href="ark-2025-12-31.xsd#ark_InformationsRelativesAuxIndicateursAlternatifsDePerformanceEtInformationSectorielleTextBlock"/>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_9c04a6ce-e6d7-4551-8d55-02f5fa704ef2_totalLabel_en" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">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/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
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    <link:loc xlink:type="locator" xlink:label="loc_ark_VariationDesFournisseursDImmobilisations" xlink:href="ark-2025-12-31.xsd#ark_VariationDesFournisseursDImmobilisations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ark_VariationDesFournisseursDImmobilisations" xlink:to="lab_ark_VariationDesFournisseursDImmobilisations" xlink:type="arc" order="1"/>
    <link:label id="lab_ark_AcquisitionOuCessionDactionsPropres_51b90edb-bc82-406e-911b-25198e348b41_label_en" xlink:label="lab_ark_AcquisitionOuCessionDactionsPropres" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Acquisition Ou Cession D'actions Propres</link:label>
    <link:label id="lab_ark_AcquisitionOuCessionDactionsPropres_f5182336-3c78-45c0-9ce5-617ad218833d_documentation_en" xlink:label="lab_ark_AcquisitionOuCessionDactionsPropres" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Acquisition or Disposal of Own Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ark_AcquisitionOuCessionDactionsPropres" xlink:href="ark-2025-12-31.xsd#ark_AcquisitionOuCessionDactionsPropres"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ark_AcquisitionOuCessionDactionsPropres" xlink:to="lab_ark_AcquisitionOuCessionDactionsPropres" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_de42fd57-1f95-46ef-b6c0-2107203bc142_totalLabel_en" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">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/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
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    <link:label id="lab_ark_ObligationsHybridesMember_cee83979-f03e-46e7-8a02-09fcb5db93c7_label_en" xlink:label="lab_ark_ObligationsHybridesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Hybrid bonds</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ark_ObligationsHybridesMember" xlink:href="ark-2025-12-31.xsd#ark_ObligationsHybridesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ark_ObligationsHybridesMember" xlink:to="lab_ark_ObligationsHybridesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests_019bfc0e-4945-7e0c-a193-b2441736dd89_label_en" xlink:label="lab_ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Dividends Paid to Non-Controlling Interests and Purchase of Minority Interests</link:label>
    <link:label id="lab_ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests_dae7b6c2-01bf-41c9-81a6-f7b2201943f0_documentation_en" xlink:label="lab_ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en">Dividends Paid to Non-Controlling Interests and Purchase of Minority Interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests" xlink:href="ark-2025-12-31.xsd#ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests" xlink:to="lab_ark_DividendsPaidToNon-ControllingInterestsAndPurchaseOfMinorityInterests" xlink:type="arc" order="1"/>
    <link:label id="lab_ark_CoutsEtChargesDExploitation_8d97c221-0697-4dc8-a59b-ed92d1e67c27_label_en" xlink:label="lab_ark_CoutsEtChargesDExploitation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Operating costs and expenses</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ark_CoutsEtChargesDExploitation" xlink:href="ark-2025-12-31.xsd#ark_CoutsEtChargesDExploitation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ark_CoutsEtChargesDExploitation" xlink:to="lab_ark_CoutsEtChargesDExploitation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InflowsOfCashFromInvestingActivities_f3ed2d85-a7d6-4c61-9912-c1b7bbcf89be_totalLabel_en" xlink:label="lab_ifrs-full_InflowsOfCashFromInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Inflows of cash from investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InflowsOfCashFromInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InflowsOfCashFromInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InflowsOfCashFromInvestingActivities" xlink:to="lab_ifrs-full_InflowsOfCashFromInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ark_TransactionsAvecLesProprietairesAbstract_16764288-b40c-4332-8875-839323ae9807_label_en" xlink:label="lab_ark_TransactionsAvecLesProprietairesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Transactions with owners</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ark_TransactionsAvecLesProprietairesAbstract" xlink:href="ark-2025-12-31.xsd#ark_TransactionsAvecLesProprietairesAbstract"/>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities_6875c761-44b0-4473-9fc4-fc6fa069e81c_totalLabel_en" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Cash flows from (used in) operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ark_AutresProvisionsEtImpotsDifferes_bb014eef-c7d6-47a6-b3c9-5f5cb0ffa967_label_en" xlink:label="lab_ark_AutresProvisionsEtImpotsDifferes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Other provisions and deferred taxes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ark_AutresProvisionsEtImpotsDifferes" xlink:href="ark-2025-12-31.xsd#ark_AutresProvisionsEtImpotsDifferes"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ark_AutresProvisionsEtImpotsDifferes" xlink:to="lab_ark_AutresProvisionsEtImpotsDifferes" xlink:type="arc" order="1"/>
    <link:label id="lab_ark_InformationsRelativesAuxEnjeuxClimatiquesTextBlock_7e8d8e91-9799-4b23-a10a-981b9070ec5e_label_en" xlink:label="lab_ark_InformationsRelativesAuxEnjeuxClimatiquesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Disclosure of climate changes issues</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ark_InformationsRelativesAuxEnjeuxClimatiquesTextBlock" xlink:href="ark-2025-12-31.xsd#ark_InformationsRelativesAuxEnjeuxClimatiquesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ark_InformationsRelativesAuxEnjeuxClimatiquesTextBlock" xlink:to="lab_ark_InformationsRelativesAuxEnjeuxClimatiquesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OutflowsOfCashFromInvestingActivities_f6d2430c-a962-442c-8c54-42439a820feb_totalLabel_en" xlink:label="lab_ifrs-full_OutflowsOfCashFromInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en">Outflows of cash from investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OutflowsOfCashFromInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OutflowsOfCashFromInvestingActivities"/>
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    <link:label id="lab_ark_ProduitsDeCessionDActifsIncorporelsEtCorporelsHorsVariationsDesCreancesSurCessionDImmobilisations_e5c6a633-ed7a-426c-a72d-4d75a4f37726_label_en" xlink:label="lab_ark_ProduitsDeCessionDActifsIncorporelsEtCorporelsHorsVariationsDesCreancesSurCessionDImmobilisations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Proceeds from disposal of intangible and tangible assets</link:label>
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    <link:label id="lab_ark_ReclassificationOfPerpetualHybridBonds_019c474d-cf52-71cf-8cbc-7ab7fd18cf25_label_en" xlink:label="lab_ark_ReclassificationOfPerpetualHybridBonds" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en">Reclassification Of Perpetual Hybrid Bonds</link:label>
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