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  <xs:element id="amg_DuetoRelatedPartiesFairValueDisclosure" abstract="false" name="DuetoRelatedPartiesFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_ContingentPaymentArrangementsMember" abstract="true" name="ContingentPaymentArrangementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_ObligationsToRelatedPartiesMember" abstract="true" name="ObligationsToRelatedPartiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesAndIssuances" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchasesAndIssuances" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementsAndReductions" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlementsAndReductions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_ValuationTechniqueMonteCarloSimulationMember" abstract="true" name="ValuationTechniqueMonteCarloSimulationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_ContingentConsiderationLiabilityMeasurementInput" abstract="false" name="ContingentConsiderationLiabilityMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="amg_DueToRelatedPartiesFairValueDisclosure" abstract="false" name="DueToRelatedPartiesFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DueToRelatedPartiesMeasurementInput" abstract="false" name="DueToRelatedPartiesMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="amg_VotingRightsEntitiesMember" abstract="true" name="VotingRightsEntitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_EquityMethodInvestmentReportingEntityInvolvementMaximumLossExposureAmount" abstract="false" name="EquityMethodInvestmentReportingEntityInvolvementMaximumLossExposureAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_SeniorUnsecuredCreditFacilityRevolverMember" abstract="true" name="SeniorUnsecuredCreditFacilityRevolverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_LineofCreditFacilityMaximumBorrowingCapacityAdditionalAmount" abstract="false" name="LineofCreditFacilityMaximumBorrowingCapacityAdditionalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_SeniorNotesThreePointThreeZeroPercentDue2030Member" abstract="true" name="SeniorNotesThreePointThreeZeroPercentDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_SeniorNotesFivePointFiveZeroPercentDue2034Member" abstract="true" name="SeniorNotesFivePointFiveZeroPercentDue2034Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_SeniorNotesFivePointFiveZeroPercentDue2036Member" abstract="true" name="SeniorNotesFivePointFiveZeroPercentDue2036Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_DebtInstrumentRedemptionPricePercentageTriggeringEvents" abstract="false" name="DebtInstrumentRedemptionPricePercentageTriggeringEvents" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="amg_DebtInstrumentMakeWholePremiumDiscountRateBasisSpreadonVariableRate" abstract="false" name="DebtInstrumentMakeWholePremiumDiscountRateBasisSpreadonVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="amg_JuniorConvertibleTrustPreferredSecuritiesMember" abstract="true" name="JuniorConvertibleTrustPreferredSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_DebtInstrumentConversionReferencePeriod" abstract="false" name="DebtInstrumentConversionReferencePeriod" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="amg_AdjustmentToAdditionalPaidInCapitalConvertibleDebtInstrumentDecreaseFromConversionPremium" abstract="false" name="AdjustmentToAdditionalPaidInCapitalConvertibleDebtInstrumentDecreaseFromConversionPremium" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DebtInstrumentConvertibleConversionPremiumLiability" abstract="false" name="DebtInstrumentConvertibleConversionPremiumLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AdjustmentToAdditionalPaidInCapitalConvertibleDebtInstrumentIncreaseFromConversion" abstract="false" name="AdjustmentToAdditionalPaidInCapitalConvertibleDebtInstrumentIncreaseFromConversion" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DebtInstrumentConvertibleConversionPremiumDecreaseInDeferredIncomeTaxLiabilitiesNet" abstract="false" name="DebtInstrumentConvertibleConversionPremiumDecreaseInDeferredIncomeTaxLiabilitiesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_ForwardSaleContractExpense" abstract="false" name="ForwardSaleContractExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_RedemptionOfConvertibleDebtSecuritiesNotConvertedAmount" abstract="false" name="RedemptionOfConvertibleDebtSecuritiesNotConvertedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_RepaymentsOfConvertibleDebtIncludingConversionPayment" abstract="false" name="RepaymentsOfConvertibleDebtIncludingConversionPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DeferredTaxLiabilitiesRecaptureOfExcessInterestExpenseInYearOne" abstract="false" name="DeferredTaxLiabilitiesRecaptureOfExcessInterestExpenseInYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_CommitmentAndContingenciesTable" abstract="true" name="CommitmentAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="amg_PaymentsForAchievementOfFinancialTargetsMember" abstract="true" name="PaymentsForAchievementOfFinancialTargetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_CoinvestorMember" abstract="true" name="CoinvestorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_CommitmentAndContingenciesLineItems" abstract="true" name="CommitmentAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_InvestmentCommitmentAmount" abstract="false" name="InvestmentCommitmentAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DeferredPaymentObligationsLiability" abstract="false" name="DeferredPaymentObligationsLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DeferredPaymentObligationsLiabilityRemainderOfFiscalYear" abstract="false" name="DeferredPaymentObligationsLiabilityRemainderOfFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DeferredPaymentObligationsToBePaidYearOne" abstract="false" name="DeferredPaymentObligationsToBePaidYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_GuarantorObligationsFairValue" abstract="false" name="GuarantorObligationsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_ScheduleOfIntangibleAssetsByMajorClassTable" abstract="true" name="ScheduleOfIntangibleAssetsByMajorClassTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="amg_IntangibleAssetsByMajorClassAxis" abstract="true" name="IntangibleAssetsByMajorClassAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="amg_IntangibleAssetsByMajorClassDomain" abstract="true" name="IntangibleAssetsByMajorClassDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_IntangibleAssetLineItems" abstract="true" name="IntangibleAssetLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossBeforeAdjustmentOnAccumulatedAmortization" abstract="false" name="FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLossBeforeAdjustmentOnAccumulatedAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation" abstract="false" name="FiniteLivedIntangibleAssetAccumulatedAmortizationForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_IntangibleAssetsRollForward" abstract="true" name="IntangibleAssetsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_IntangibleAssetsNetExcludingGoodwillTranslationAdjustments" abstract="false" name="IntangibleAssetsNetExcludingGoodwillTranslationAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AcquiredClientRelationshipsForCertainMutualFundAssetsMember" abstract="true" name="AcquiredClientRelationshipsForCertainMutualFundAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_AcquiredClientRelationshipsMutualFundProductMember" abstract="true" name="AcquiredClientRelationshipsMutualFundProductMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_ImpairmentOfIntangibleAssetsIndefiniteLivedExcludingGoodwillControllingInterest" abstract="false" name="ImpairmentOfIntangibleAssetsIndefiniteLivedExcludingGoodwillControllingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_ImpairmentAssessmentAssumptionsRevenueGrowthRates" abstract="false" name="ImpairmentAssessmentAssumptionsRevenueGrowthRates" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="amg_ImpairmentAssessmentAssumptionsLongTermRevenueGrowthRates" abstract="false" name="ImpairmentAssessmentAssumptionsLongTermRevenueGrowthRates" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="amg_ImpairmentAssessmentAssumptionsDiscountRates" abstract="false" name="ImpairmentAssessmentAssumptionsDiscountRates" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="amg_NumberOfAffiliatesEquityMethodInvestment" abstract="false" name="NumberOfAffiliatesEquityMethodInvestment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="amg_ChangeinEquityMethodInvestmentsinAffiliatesRollForward" abstract="true" name="ChangeinEquityMethodInvestmentsinAffiliatesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_ObligationsAndPaymentsToAcquireInterestInSubsidiariesAndAffiliates" abstract="false" name="ObligationsAndPaymentsToAcquireInterestInSubsidiariesAndAffiliates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_IncomeLossfromEquityMethodInvestmentsBeforeAmortizationofIntangibles" abstract="false" name="IncomeLossfromEquityMethodInvestmentsBeforeAmortizationofIntangibles" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_EquityMethodInvestmentIntangibleAssetAmortizationandImpairments" abstract="false" name="EquityMethodInvestmentIntangibleAssetAmortizationandImpairments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_EquityMethodInvestmentRealizedGainLossonForeignCurrencyTranslation" abstract="false" name="EquityMethodInvestmentRealizedGainLossonForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_EquityMethodInvestmentUndistributedEarnings" abstract="false" name="EquityMethodInvestmentUndistributedEarnings" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_PrivateEquityInvestmentPartnershipsofAffiliateMember" abstract="true" name="PrivateEquityInvestmentPartnershipsofAffiliateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_AffiliateTaxDistributionsMember" abstract="true" name="AffiliateTaxDistributionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_CommonStockVotingRightsPercent" abstract="false" name="CommonStockVotingRightsPercent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="amg_TermOfConditionalRighttoPutInterest" abstract="false" name="TermOfConditionalRighttoPutInterest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="amg_RedeemableNoncontrollingInterestRollForward" abstract="true" name="RedeemableNoncontrollingInterestRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships" abstract="false" name="NoncontrollingInterestIncreasedecreaseAttributabletoConsolidatedPartnerships" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_NoncontrollingInterestDecreasefromTransferstoOtherLiabilities" abstract="false" name="NoncontrollingInterestDecreasefromTransferstoOtherLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AffiliateEquityTable" abstract="true" name="AffiliateEquityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="amg_AffiliateEquityLineItems" abstract="true" name="AffiliateEquityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_PaymentsForAffiliateEquityIssuancesAndRepurchasesGross" abstract="false" name="PaymentsForAffiliateEquityIssuancesAndRepurchasesGross" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_ProceedsFromAffiliateEquityIssuances" abstract="false" name="ProceedsFromAffiliateEquityIssuances" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_CompensationExpensesRelatedToAffiliateEquity" abstract="false" name="CompensationExpensesRelatedToAffiliateEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AffiliateEquityCompensationExpenseAttributabletoNoncontrollingInterest" abstract="false" name="AffiliateEquityCompensationExpenseAttributabletoNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest" abstract="false" name="AffiliateEquityCompensationExpenseIncludingPortionAttributabletoNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_UnrecognizedAffiliateEquityExpenseAbstract" abstract="true" name="UnrecognizedAffiliateEquityExpenseAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_UnrecognizedCompensationExpensesRelatedtoAffiliateEquityAttributabletoControllingInterest" abstract="false" name="UnrecognizedCompensationExpensesRelatedtoAffiliateEquityAttributabletoControllingInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AffiliateEquityUnrecognizedCompensationExpenseRemainingLife" abstract="false" name="AffiliateEquityUnrecognizedCompensationExpenseRemainingLife" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="amg_AffiliateEquityUnrecognizedCompensationExpenseAttributabletoNoncontrollingInterest" abstract="false" name="AffiliateEquityUnrecognizedCompensationExpenseAttributabletoNoncontrollingInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsIssuances" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsIssuances" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsPurchases" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalIncreaseDecreaseInCarryingAmountOfRedeemableNoncontrollingInterestsPurchases" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests" abstract="false" name="IncreaseDecreaseInEquityDueToProfitLossAndNetTransfersWithNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPeriodIncreaseDecreasePerformanceConditionChanges" abstract="false" name="SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPeriodIncreaseDecreasePerformanceConditionChanges" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="amg_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceConditionChangesWeightedAverageGrantDateFairValue" abstract="false" name="SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceConditionChangesWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="amg_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsPeriodIncreaseDecreasePerformanceConditionChanges" abstract="false" name="ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsPeriodIncreaseDecreasePerformanceConditionChanges" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="amg_SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsPerformanceConditionChangesWeightedAverageExercisePrice" abstract="false" name="SharebasedCompensationArrangementsbySharebasedPaymentAwardOptionsPerformanceConditionChangesWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="amg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualLifeAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualLifeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_IncomeTaxProvisionTable" abstract="true" name="IncomeTaxProvisionTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="amg_IncomeTaxLineItems" abstract="true" name="IncomeTaxLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="amg_IncomeTaxExpenseBenefitControllingInterest" abstract="false" name="IncomeTaxExpenseBenefitControllingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_IncomeTaxExpenseBenefitNonControllingInterest" abstract="false" name="IncomeTaxExpenseBenefitNonControllingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent" abstract="false" name="IncomeLossFromContinuingOperationsBeforeIncomeTaxesAttributableToParent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_DeferredIncomeTaxBenefitExpenseRelatedToIntangibles" abstract="false" name="DeferredIncomeTaxBenefitExpenseRelatedToIntangibles" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_NetIncomeLossOtherNoncontrollingInterestsRedeemable" abstract="false" name="NetIncomeLossOtherNoncontrollingInterestsRedeemable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="amg_SettlementOfRedeemableNonControllingInterestsSharesIssued" abstract="false" name="SettlementOfRedeemableNonControllingInterestsSharesIssued" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="amg_EmployeeStockOptionsandRestrictedStockMember" abstract="true" name="EmployeeStockOptionsandRestrictedStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="amg_SharesIssuableToSettleRedeemableNonControllingInterestsMember" abstract="true" name="SharesIssuableToSettleRedeemableNonControllingInterestsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
