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          xlink:type="resource"
          xml:lang="en">Total non-current assets</label>
        <loc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Trade accounts and notes receivable</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_ConsolidatedRetainedEarnings"
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_ConsolidatedRetainedEarnings"
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          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Consolidated retained earnings</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_EmployeeBenefitsExpenseExcludingShareBasedPayment"
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_EmployeeBenefitsExpenseExcludingShareBasedPayment"
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        <label
          xlink:label="label_atos_EmployeeBenefitsExpenseExcludingShareBasedPayment"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Personnel expense</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_NonPersonnelOperationalExpenses"
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          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_NonPersonnelOperationalExpenses"
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          xlink:type="arc"/>
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          xlink:label="label_atos_NonPersonnelOperationalExpenses"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Non-personnel operating expense</label>
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          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_OperatingMargin"
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_OperatingMargin"
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          xlink:type="arc"/>
        <label
          xlink:label="label_atos_OperatingMargin"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Operating Margin</label>
        <label
          xlink:label="label_atos_OperatingMargin"
          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="en">Operating Margin</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_OtherOperatingIncomeAndExpenseNet"
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_OtherOperatingIncomeAndExpenseNet"
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          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Other operating income and expense</label>
        <loc
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_NetCostOfFinancialDebt"
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          xlink:type="arc"/>
        <label
          xlink:label="label_atos_NetCostOfFinancialDebt"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net cost of financial debt</label>
        <loc
          xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceIncomeCost"
          xlink:label="ifrs-full_FinanceIncomeCost"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_FinanceIncomeCost"
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          xlink:type="arc"/>
        <label
          xlink:label="label_ifrs-full_FinanceIncomeCost"
          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="en">Finance income (cost)</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_ProfitLossBeforeTaxAndBeforeShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod"
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_ProfitLossBeforeTaxAndBeforeShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod"
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          xlink:type="arc"/>
        <label
          xlink:label="label_atos_ProfitLossBeforeTaxAndBeforeShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net income (loss) before tax and before share of net profit (loss) of equity-accounted investments</label>
        <label
          xlink:label="label_atos_ProfitLossBeforeTaxAndBeforeShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod"
          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="en">Net income (loss) before tax and before share of net profit (loss) of equity-accounted investments</label>
        <loc
          xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent"
          xlink:label="ifrs-full_ProfitLossAttributableToOwnersOfParent"
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_ProfitLossAttributableToOwnersOfParent"
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          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="en">Net income (loss) attributable to owners of the parent</label>
        <loc
          xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_WeightedAverageShares"
          xlink:label="ifrs-full_WeightedAverageShares"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_WeightedAverageShares"
          xlink:to="label_ifrs-full_WeightedAverageShares"
          xlink:type="arc"/>
        <label
          xlink:label="label_ifrs-full_WeightedAverageShares"
          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="en">Weighted average number of ordinary shares outstanding</label>
        <loc
          xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustedWeightedAverageShares"
          xlink:label="ifrs-full_AdjustedWeightedAverageShares"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_AdjustedWeightedAverageShares"
          xlink:to="label_ifrs-full_AdjustedWeightedAverageShares"
          xlink:type="arc"/>
        <label
          xlink:label="label_ifrs-full_AdjustedWeightedAverageShares"
          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="en">Adjusted weighted average number of ordinary shares outstanding</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_AdjustmentsForDepreciationAndAmortisationExpenseExcludingDepreciationOfRightOfUseAndAmortisationOfAquisitionRelatedIntangibleAssets"
          xlink:label="atos_AdjustmentsForDepreciationAndAmortisationExpenseExcludingDepreciationOfRightOfUseAndAmortisationOfAquisitionRelatedIntangibleAssets"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustmentsForDepreciationAndAmortisationExpenseExcludingDepreciationOfRightOfUseAndAmortisationOfAquisitionRelatedIntangibleAssets"
          xlink:to="label_atos_AdjustmentsForDepreciationAndAmortisationExpenseExcludingDepreciationOfRightOfUseAndAmortisationOfAquisitionRelatedIntangibleAssets"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Depreciation of fixed assets</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_AdjustementsForDepreciationOfRightOfUse"
          xlink:label="atos_AdjustementsForDepreciationOfRightOfUse"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustementsForDepreciationOfRightOfUse"
          xlink:to="label_atos_AdjustementsForDepreciationOfRightOfUse"
          xlink:type="arc"/>
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          xlink:label="label_atos_AdjustementsForDepreciationOfRightOfUse"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Depreciation of right-of-use</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_AdjustmentsForOperatingProvisions"
          xlink:label="atos_AdjustmentsForOperatingProvisions"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustmentsForOperatingProvisions"
          xlink:to="label_atos_AdjustmentsForOperatingProvisions"
          xlink:type="arc"/>
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          xlink:label="label_atos_AdjustmentsForOperatingProvisions"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net addition (release) to operating provisions</label>
        <loc
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          xlink:label="atos_AdjustmentsForFinancialProvisions"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustmentsForFinancialProvisions"
          xlink:to="label_atos_AdjustmentsForFinancialProvisions"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net addition (release) to financial provisions</label>
        <loc
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          xlink:label="atos_AdjustmentsForOtherOperatingProvisions"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustmentsForOtherOperatingProvisions"
          xlink:to="label_atos_AdjustmentsForOtherOperatingProvisions"
          xlink:type="arc"/>
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net addition (release) to other operating provisions</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_AdjustmentsForAmortisationOfAcquisitionRelatedIntangibleAssets"
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustmentsForAmortisationOfAcquisitionRelatedIntangibleAssets"
          xlink:to="label_atos_AdjustmentsForAmortisationOfAcquisitionRelatedIntangibleAssets"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Amortization of intangible assets (PPA from acquisitions)</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_AdjustmentsForNetCostOfFinancialDebt"
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustmentsForNetCostOfFinancialDebt"
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          xlink:type="arc"/>
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net cost of financial debt</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_AdjustmentsForInterestOnLeaseLiabilities"
          xlink:label="atos_AdjustmentsForInterestOnLeaseLiabilities"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AdjustmentsForInterestOnLeaseLiabilities"
          xlink:to="label_atos_AdjustmentsForInterestOnLeaseLiabilities"
          xlink:type="arc"/>
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          xlink:label="label_atos_AdjustmentsForInterestOnLeaseLiabilities"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Interest on lease liability</label>
        <loc
          xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
          xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
          xlink:to="label_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
          xlink:type="arc"/>
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="en">Cash flows from (used in) operations before changes in working capital</label>
        <loc
          xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities"
          xlink:to="label_ifrs-full_CashFlowsFromUsedInOperatingActivities"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="en">Net cash flows from (used in) operating activities</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_PaymentForTangibleAndIntangibleAssets"
          xlink:label="atos_PaymentForTangibleAndIntangibleAssets"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_PaymentForTangibleAndIntangibleAssets"
          xlink:to="label_atos_PaymentForTangibleAndIntangibleAssets"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Payment for tangible and intangible assets</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_ProceedsFromDisposalsOfTangibleAndIntangibleAssets"
          xlink:label="atos_ProceedsFromDisposalsOfTangibleAndIntangibleAssets"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_ProceedsFromDisposalsOfTangibleAndIntangibleAssets"
          xlink:to="label_atos_ProceedsFromDisposalsOfTangibleAndIntangibleAssets"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Proceeds from disposals of tangible and intangible assets</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_NetOperatingInvestments"
          xlink:label="atos_NetOperatingInvestments"
          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_NetOperatingInvestments"
          xlink:to="label_atos_NetOperatingInvestments"
          xlink:type="arc"/>
        <label
          xlink:label="label_atos_NetOperatingInvestments"
          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net operating investments</label>
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          xlink:label="label_atos_NetOperatingInvestments"
          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="en">Net operating investments</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_AmountsPaidForAcquisitionsAndLongtermInvestments"
          xlink:label="atos_AmountsPaidForAcquisitionsAndLongtermInvestments"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="atos_AmountsPaidForAcquisitionsAndLongtermInvestments"
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          xlink:type="arc"/>
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Amounts paid for acquisitions and long-term investments</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_NetProceedsFromDisposalsOfFinancialInvestments"
          xlink:label="atos_NetProceedsFromDisposalsOfFinancialInvestments"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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          xlink:to="label_atos_NetProceedsFromDisposalsOfFinancialInvestments"
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="en">Net proceeds from disposals of financial investments</label>
        <loc
          xlink:href="5493001EZOOA66PTBR68-2024-12-31.xsd#atos_CashAndCashEquivalentsOfCompaniesSoldDuringThePeriod"
          xlink:label="atos_CashAndCashEquivalentsOfCompaniesSoldDuringThePeriod"
          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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