<?xml version="1.0" encoding="utf-8"?>
<?taxonomy-generator id="PomdocPro" version="2021.1.1.1" date="2026-04-28 21:12:38"?>
<linkbase 
  xml:lang="fr"
  xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"
>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent"
    xlink:label="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_AdjustmentsForCostOfNetDebt"
    xlink:label="ALT_AdjustmentsForCostOfNetDebt"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:label="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingIncomeFromOrdinaryActivities"
    xlink:label="ALT_OtherOperatingIncomeFromOrdinaryActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:label="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
    xlink:label="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CostOfNetDebt"
    xlink:label="ALT_CostOfNetDebt"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
    xlink:label="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NumberOfSharesIssued"
    xlink:label="ifrs-full_NumberOfSharesIssued"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
    xlink:label="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
    xlink:label="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
    xlink:label="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:label="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
    xlink:label="ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonStockPurchasesAndSubcontractingBusiness"
    xlink:label="ALT_NonStockPurchasesAndSubcontractingBusiness"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
    xlink:label="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProfitLossFromConsolidatedCompanies"
    xlink:label="ALT_ProfitLossFromConsolidatedCompanies"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax"
    xlink:label="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
    xlink:label="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:label="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"
    xlink:label="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"
    xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProfitLossFromOrdinaryOperatingActivities"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:label="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets"
    xlink:label="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ExternalOperatingExpensesByNature"
    xlink:label="ALT_ExternalOperatingExpensesByNature"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:label="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"
    xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingExpensesFromOrdinaryActivities"
    xlink:label="ALT_OtherOperatingExpensesFromOrdinaryActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_InterestPaidReceivedClassifiedAsFinancingActivities"
    xlink:label="ALT_InterestPaidReceivedClassifiedAsFinancingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
    xlink:label="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ChangesInCashAndCashEquivalentsAbstract"
    xlink:label="ALT_ChangesInCashAndCashEquivalentsAbstract"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
    xlink:label="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"
    xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesIssued"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssued"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
    xlink:label="ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
  />
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d&apos;actions en circulation par émission de capitaux propres</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent"
    xlink:to="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Charges constatees d&apos;avance et créances de TVA courantes</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d’actions en circulation par le biais de transactions sur actions propres</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForCostOfNetDebt"
    xlink:to="ALT_AdjustmentsForCostOfNetDebt_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForCostOfNetDebt_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Ajustement du coût de l’endettement financier net</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Achat d’immobilisations corporelles et d’immobilisations incorporelles autres que le goodwill</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromOrdinaryActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromOrdinaryActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Autres produits d’exploitation courant</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Entrées de trésorerie découlant du remboursement d’avances et de prêts consentis à d’autres parties et produits résultant de la vente ou de l’échéance d’instruments financiers, classés dans les activités d’investissement</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
    xlink:to="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Ajustements pour provisions financières et actualisation</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CostOfNetDebt"
    xlink:to="ALT_CostOfNetDebt_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CostOfNetDebt_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Coût de l’endettement financier net</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
    xlink:to="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Paiements pour acquérir ou racheter les actions de l’entité et produits de la vente ou de l’émission d’actions propres</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_NumberOfSharesIssued"
    xlink:to="ifrs-full_NumberOfSharesIssued_periodEndLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_NumberOfSharesIssued_periodEndLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"
    xml:lang="fr"
  >Nombre d&apos;actions émises à la fin de la période</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Intérêts minoritaires, résultats non distribués, profit (perte) pour la période de reporting [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
    xlink:to="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Participations ne donnant pas le contrôle, réserve des écarts de change résultant de la conversion [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
    xlink:to="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Impact des variations de périmètre et paiement de contreparties éventuelles, classées en activités d&apos;investissement</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Produits de cessions d&apos;immobilisations corporelles et incorporelles</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
    xlink:to="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Participations ne donnant pas le contrôle, réserve des écarts de change résultant de la conversion [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Autres charges d’exploitation non courantes</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonStockPurchasesAndSubcontractingBusiness"
    xlink:to="ALT_NonStockPurchasesAndSubcontractingBusiness_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonStockPurchasesAndSubcontractingBusiness_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Achats hors stock et activité de sous-traitance</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d&apos;actions émises dans le cadre de transactions avec les propriétaires</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
    xlink:to="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Ajustements pour provisions et ajustements pour dotations aux amortissements et perte de valeur (reprise de perte de valeur) comptabilisée en résultat</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromConsolidatedCompanies"
    xlink:to="ALT_ProfitLossFromConsolidatedCompanies_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromConsolidatedCompanies_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Résultat des sociétés intégrées</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_NumberOfSharesIssued"
    xlink:to="ifrs-full_NumberOfSharesIssued_periodStartLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_NumberOfSharesIssued_periodStartLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"
    xml:lang="fr"
  >Nombres d&apos;actions émises au début de la période</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax"
    xlink:to="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Dettes sociales et fiscales courantes hors impôts sur le résultat</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d’actions en circulation par le biais de transactions avec les propriétaires</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
    xlink:to="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Produits provenant d’emprunts non courants et remboursements d’emprunts non courants</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Avances de trésorerie et prêts faits à des tiers et achat d’instruments financiers, classé dans les activités d’investissement</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Entrées de trésorerie découlant du remboursement d’avances et de prêts consentis à d’autres parties et produits résultant de la vente ou de l’échéance d’instruments financiers, classés dans les activités d’investissement</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"
    xlink:to="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Amortissements des actifs incorporels identifiables comptabilisés à la date d’acquisition</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonStockPurchasesAndSubcontractingBusiness"
    xlink:to="ALT_NonStockPurchasesAndSubcontractingBusiness_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonStockPurchasesAndSubcontractingBusiness_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Achats hors stock et activité de sous-traitance</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d&apos;actions émises dans le cadre de transactions avec les propriétaires</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
    xlink:to="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Flux de trésorerie résultant (utilisés dans le cadre) des activités avant variations du fonds de roulement [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"
    xlink:to="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Augmentation (diminution) par le biais de transactions avec les propriétaires, capitaux propres [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivities"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Profits (pertes) d’exploitation courant</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Participations ne donnant pas le contrôle, autres réserves et résultats non distribués, hors profit (perte) pour la période de reporting [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets"
    xlink:to="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Exclusion amortissements actifs incorporels lié aux acquisitions</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromOrdinaryActivities_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromOrdinaryActivities_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Autres produits d’exploitation courant</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ExternalOperatingExpensesByNature"
    xlink:to="ALT_ExternalOperatingExpensesByNature_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ExternalOperatingExpensesByNature_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Charges externes par nature</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Participations ne donnant pas le contrôle, autres réserves et résultats non distribués, hors profit (perte) pour la période de reporting [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Autres réserves diverses et résultats non distribués, hors profit (perte) pour la période de reporting [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities"
    xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Flux de trésorerie résultant (utilisés dans le cadre) d&apos;activités d&apos;investissement [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
    xlink:to="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Ajustements pour provisions et ajustements pour dotations aux amortissements et perte de valeur (reprise de perte de valeur) comptabilisée en résultat</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromOrdinaryActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromOrdinaryActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Autres charges d’exploitation courantes</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d&apos;actions en circulation par émission de capitaux propres</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_InterestPaidReceivedClassifiedAsFinancingActivities"
    xlink:to="ALT_InterestPaidReceivedClassifiedAsFinancingActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_InterestPaidReceivedClassifiedAsFinancingActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Intérêts financiers nets versés</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
    xlink:to="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Impact des variations de périmètre et paiement de contreparties éventuelles, classées en activités d&apos;investissement</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
    xlink:to="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Ajustements pour provisions financières et actualisation</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
    xlink:to="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Charges de personnel, hors charges liées aux transactions dont le paiement est fondé sur des actions avec les salariés</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d’actions en circulation par le biais de transactions avec les propriétaires</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Autres réserves diverses et résultats non distribués, hors profit (perte) pour la période de reporting [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForCostOfNetDebt"
    xlink:to="ALT_AdjustmentsForCostOfNetDebt_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForCostOfNetDebt_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Ajustement du coût de l’endettement financier net</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivities"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivities_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivities_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Profits (pertes) d’exploitation courant</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Bénéfice (perte) des activités d&apos;exploitation avant opérations de paiement en actions</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Avances de trésorerie et prêts faits à des tiers et achat d’instruments financiers, classé dans les activités d’investissement</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities"
    xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Flux de trésorerie nets résultant (utilisés dans le cadre) d&apos;activités opérationnelles [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Intérêts minoritaires, résultats non distribués, profit (perte) pour la période de reporting [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Achat d’immobilisations corporelles et d’immobilisations incorporelles autres que le goodwill</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ChangesInCashAndCashEquivalentsAbstract"
    xlink:to="ALT_ChangesInCashAndCashEquivalentsAbstract_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ChangesInCashAndCashEquivalentsAbstract_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Variation Trésorerie et équivalents de trésorerie [Abstract]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
    xlink:to="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Actions propres, autres réserves et résultats non distribués, hors profit (perte) pour la période de reporting</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities"
    xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Flux de trésorerie résultant (utlisés dans le cadre) d&apos;activités de financement [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
    xlink:to="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Actions propres, autres réserves et résultats non distribués, hors profit (perte) pour la période de reporting</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Autres charges d’exploitation non courantes</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssued"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssued_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssued_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Augmentation de capital</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Produits de cessions d&apos;immobilisations corporelles et incorporelles</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromOrdinaryActivities_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromOrdinaryActivities_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Autres charges d’exploitation courantes</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromConsolidatedCompanies"
    xlink:to="ALT_ProfitLossFromConsolidatedCompanies_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromConsolidatedCompanies_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Résultat des sociétés intégrées</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssued"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssued_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssued_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d&apos;actions émises</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
    xlink:to="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Charges de personnel, hors charges liées aux transactions dont le paiement est fondé sur des actions avec les salariés</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Augmentation (diminution) du nombre d’actions en circulation par le biais de transactions sur actions propres</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Autres produits d’exploitation non courants</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
    xlink:to="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Paiements pour acquérir ou racheter les actions de l’entité et produits de la vente ou de l’émission d’actions propres</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Autres produits d’exploitation non courants</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CostOfNetDebt"
    xlink:to="ALT_CostOfNetDebt_label_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CostOfNetDebt_label_fr"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="fr"
  >Coût de l’endettement financier net</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
    xlink:to="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_verboseLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_verboseLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="fr"
  >Produits provenant d’emprunts non courants et remboursements d’emprunts non courants</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_totalLabel_fr"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_totalLabel_fr"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="fr"
  >Bénéfice (perte) des activités d&apos;exploitation avant opérations de paiement en actions</label>
  </labelLink>
</linkbase>