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  <xs:element id="step_CarriedInterestAllocationMember" abstract="true" name="CarriedInterestAllocationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_StockIssuedForAcquisitions" abstract="false" name="StockIssuedForAcquisitions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_IncreaseDecreaseInLeaseRightOfUseAssetsNetOfLeaseLiabilities" abstract="false" name="IncreaseDecreaseInLeaseRightOfUseAssetsNetOfLeaseLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_LegacyInvestmentAccruedCarriedInterestRelatedCompensationPayable" abstract="false" name="LegacyInvestmentAccruedCarriedInterestRelatedCompensationPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_StockholdersEquityEffectOfReorganization" abstract="false" name="StockholdersEquityEffectOfReorganization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_CarriedInterestAllocationFocusedCommingledFundsMember" abstract="true" name="CarriedInterestAllocationFocusedCommingledFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ClassCPartnershipUnitMember" abstract="true" name="ClassCPartnershipUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ConversionOfClassBUnitsToClassBCommonStockMember" abstract="true" name="ConversionOfClassBUnitsToClassBCommonStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_RevenueLegacyCarriedInterestAllocationAsPercentageOfCumulativeFundOrAccountPerformance" abstract="false" name="RevenueLegacyCarriedInterestAllocationAsPercentageOfCumulativeFundOrAccountPerformance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="step_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="step_CarriedInterestAllocationRevenuesMember" abstract="true" name="CarriedInterestAllocationRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ExchangeOneMember" abstract="true" name="ExchangeOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_PaymentsToRelatedPartiesTaxReceivableAgreements" abstract="false" name="PaymentsToRelatedPartiesTaxReceivableAgreements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_LineOfCreditFacilityCommitmentFeePercentageSpreadOnBaseIfUtilizationLessThan50Percent" abstract="false" name="LineOfCreditFacilityCommitmentFeePercentageSpreadOnBaseIfUtilizationLessThan50Percent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="step_EffectiveIncomeTaxRateReconciliationIncomePassedThroughToLimitedPartnersPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationIncomePassedThroughToLimitedPartnersPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="step_CarriedInterestAllocationRealizedMember" abstract="true" name="CarriedInterestAllocationRealizedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_TaxReceivableAgreementPolicyPolicyTextBlock" abstract="false" name="TaxReceivableAgreementPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="step_RegisteredOfferingMember" abstract="true" name="RegisteredOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_CurrentEventsPolicyPolicyTextBlock" abstract="false" name="CurrentEventsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="step_AdjustmentsToAdditionalPaidInCapitalReallocationOfNoncontrollingInterest" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalReallocationOfNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_DebtInstrumentBaseInterestRate" abstract="false" name="DebtInstrumentBaseInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="step_BlockerEntitiesMember" abstract="true" name="BlockerEntitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_InfrastructureSubsidiaryMember" abstract="true" name="InfrastructureSubsidiaryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsCashAndReceivables" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsCashAndReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_ContractualRightsServiceAgreementsMember" abstract="true" name="ContractualRightsServiceAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ClassBPartnershipUnitMember" abstract="true" name="ClassBPartnershipUnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_SterlingOvernightIndexAverageMember" abstract="true" name="SterlingOvernightIndexAverageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_IncreaseDecreaseInAccruedCarriedInterestRelatedCompensationPayable" abstract="false" name="IncreaseDecreaseInAccruedCarriedInterestRelatedCompensationPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_CommonStockNumberOfVotes" abstract="false" name="CommonStockNumberOfVotes" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="step_CashPaidForAmountsIncludedInTheMeasurementOfLeaseLiabilitiesAbstract" abstract="true" name="CashPaidForAmountsIncludedInTheMeasurementOfLeaseLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="step_SeparatelyManagedAccountConcentrationRiskMember" abstract="true" name="SeparatelyManagedAccountConcentrationRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_LegacyEntitiesMember" abstract="true" name="LegacyEntitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ManagementAndAdvisoryFeesNetFocusedCommingledFundsMember" abstract="true" name="ManagementAndAdvisoryFeesNetFocusedCommingledFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_LineOfCreditFacilityCommitmentFeePercentageSpreadOnBaseIfUtilizationGreaterThan50Percent" abstract="false" name="LineOfCreditFacilityCommitmentFeePercentageSpreadOnBaseIfUtilizationGreaterThan50Percent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="step_AUDScreenRateMultipliedByStatutoryReserveRateMember" abstract="true" name="AUDScreenRateMultipliedByStatutoryReserveRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_AdjustmentsToAdditionalPaidInCapitalIncreaseInDeferredTaxAssetsValuationAllowance" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalIncreaseInDeferredTaxAssetsValuationAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_OwnersMember" abstract="true" name="OwnersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ShareBasedCompensationArrangementByShareBasedPaymentAwardProfitsInterest" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardProfitsInterest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="step_ManagementContractsMember" abstract="true" name="ManagementContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ComputerEquipmentAndSoftwareMember" abstract="true" name="ComputerEquipmentAndSoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_DeferredTaxEffectFromExchangeOfUnitsNet" abstract="false" name="DeferredTaxEffectFromExchangeOfUnitsNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_NumberOfClassesOfCommonStockOutstanding" abstract="false" name="NumberOfClassesOfCommonStockOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="step_LesseeOperatingLeaseNumberOfCities" abstract="false" name="LesseeOperatingLeaseNumberOfCities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="step_RelatedPartyTransactionsPolicyTextBlock" abstract="false" name="RelatedPartyTransactionsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="step_ContractualRightsManagementContractsMember" abstract="true" name="ContractualRightsManagementContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ProceedsFromCapitalContributionsFromNonControllingInterests" abstract="false" name="ProceedsFromCapitalContributionsFromNonControllingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_LegacyFundsMember" abstract="true" name="LegacyFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_EquityMethodInvestmentAccruedCarriedInterestRelatedCompensationPayable" abstract="false" name="EquityMethodInvestmentAccruedCarriedInterestRelatedCompensationPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_EquityMethodInvestmentsExcludingAccruedCarriedInterestAllocations" abstract="false" name="EquityMethodInvestmentsExcludingAccruedCarriedInterestAllocations" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_NewYorkFederalReserveBankRateMember" abstract="true" name="NewYorkFederalReserveBankRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_NumberOfPartnershipUnitsAcquired" abstract="false" name="NumberOfPartnershipUnitsAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="step_PerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocationUnrealized" abstract="false" name="PerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocationUnrealized" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_IncreaseDecreaseInDueToRelatedPartiesTaxReceivableAgreements" abstract="false" name="IncreaseDecreaseInDueToRelatedPartiesTaxReceivableAgreements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_LegacyInvestmentIncome" abstract="false" name="LegacyInvestmentIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_RevenueNotFromContractWithCustomerIncomeLossFromEquityMethodInvestmentsAndInvestmentIncome" abstract="false" name="RevenueNotFromContractWithCustomerIncomeLossFromEquityMethodInvestmentsAndInvestmentIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_EquityMethodInvestmentsAccruedCarriedInterestAllocations" abstract="false" name="EquityMethodInvestmentsAccruedCarriedInterestAllocations" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_StepStoneGroupLPMember" abstract="true" name="StepStoneGroupLPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_LegacyInvestmentsInFunds" abstract="false" name="LegacyInvestmentsInFunds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_LegacyPerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocation" abstract="false" name="LegacyPerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssetsAndReceivables" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssetsAndReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_IncentiveFeesSeparatelyManagedAccountsMember" abstract="true" name="IncentiveFeesSeparatelyManagedAccountsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_CompensationAndBenefitsExpense" abstract="false" name="CompensationAndBenefitsExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_AdjustmentsToAdditionalPaidInCapitalDeferredTaxEffectOfExchange" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalDeferredTaxEffectOfExchange" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_PerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocation" abstract="false" name="PerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_ValuationAllowanceRollForward" abstract="true" name="ValuationAllowanceRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="step_PartnershipOfSubsidiaryMember" abstract="true" name="PartnershipOfSubsidiaryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_LesseeOperatingLeaseLeaseNotYetCommencedTotalLeasePaymentsDue" abstract="false" name="LesseeOperatingLeaseLeaseNotYetCommencedTotalLeasePaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_ManagementAndAdvisoryFeesNetAdvisoryAndOtherServicesMember" abstract="true" name="ManagementAndAdvisoryFeesNetAdvisoryAndOtherServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_VariableInterestEntityNotPrimaryBeneficiaryLegacyEntitiesMember" abstract="true" name="VariableInterestEntityNotPrimaryBeneficiaryLegacyEntitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_PerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocationRealized" abstract="false" name="PerformanceFeeRelatedCompensationRelatedToCarriedInterestAllocationRealized" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_LegacyCarriedInterestAllocationMember" abstract="true" name="LegacyCarriedInterestAllocationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_DueToRelatedPartiesTaxReceivableAgreements" abstract="false" name="DueToRelatedPartiesTaxReceivableAgreements" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_CarriedInterestAllocationsNoEconomicInterestMember" abstract="true" name="CarriedInterestAllocationsNoEconomicInterestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_LIBORRateMultipliedByStatutoryReserveRateMember" abstract="true" name="LIBORRateMultipliedByStatutoryReserveRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_PartnersCapitalMember" abstract="true" name="PartnersCapitalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_TwoInvestmentsMember" abstract="true" name="TwoInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="step_SwissAverageRateOvernightMember" abstract="true" name="SwissAverageRateOvernightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ClassB2UnitMember" abstract="true" name="ClassB2UnitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ConsolidatedEntitiesExcludingLegacyEntitiesMember" abstract="true" name="ConsolidatedEntitiesExcludingLegacyEntitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_StockIssuedDuringPeriodValueExchangeOfSecuritiesAndNewIssues" abstract="false" name="StockIssuedDuringPeriodValueExchangeOfSecuritiesAndNewIssues" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_CarriedInterestAllocationAndInvestmentIncomeUnrealizedGainLoss" abstract="false" name="CarriedInterestAllocationAndInvestmentIncomeUnrealizedGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_NumberOfSharesOwnedAfterAllTransactions" abstract="false" name="NumberOfSharesOwnedAfterAllTransactions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="step_A2020LongTermIncentivePlanMember" abstract="true" name="A2020LongTermIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_NoncontrollingInterestIncreaseFromContributions" abstract="false" name="NoncontrollingInterestIncreaseFromContributions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_PaymentsToAcquireBusinessesNetOfWorkingCapitalAdjustment" abstract="false" name="PaymentsToAcquireBusinessesNetOfWorkingCapitalAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLegacyInvestmentsInFundsAndAccruedCarriedInterestAllocations" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLegacyInvestmentsInFundsAndAccruedCarriedInterestAllocations" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_LegacyGrossCarriedInterestAllocationFocusedCommingledFundsMember" abstract="true" name="LegacyGrossCarriedInterestAllocationFocusedCommingledFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_IncreaseDecreaseInDeferredTaxAssets" abstract="false" name="IncreaseDecreaseInDeferredTaxAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_RevenueCarriedInterestAllocationMinimumReturnLevelsRequired" abstract="false" name="RevenueCarriedInterestAllocationMinimumReturnLevelsRequired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="step_TaxReceivableAgreementMember" abstract="true" name="TaxReceivableAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_VariableInterestEntityNotPrimaryBeneficiarySubsidiariesMember" abstract="true" name="VariableInterestEntityNotPrimaryBeneficiarySubsidiariesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_ClassOfPartnershipUnitAxis" abstract="true" name="ClassOfPartnershipUnitAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="step_ManagementAndAdvisoryFeesNetFundReimbursementRevenuesMember" abstract="true" name="ManagementAndAdvisoryFeesNetFundReimbursementRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_AdjustmentsToAdditionalPaidInCapitalDecreaseInDeferredTaxAssetsValuationAllowance" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalDecreaseInDeferredTaxAssetsValuationAllowance" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_IncentiveFeesFocusedCommingledFundsMember" abstract="true" name="IncentiveFeesFocusedCommingledFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_EuroInterbankOfferRateMultipliedByStatutoryReserveRateMember" abstract="true" name="EuroInterbankOfferRateMultipliedByStatutoryReserveRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="step_CompensationExpenseCashBasedCompensationAndBenefits" abstract="false" name="CompensationExpenseCashBasedCompensationAndBenefits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_StockholdersEquityShareExchangeSharesExchanged" abstract="false" name="StockholdersEquityShareExchangeSharesExchanged" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="step_AdjustmentsToAdditionalPaidInCapitalPurchaseOfPartnershipInterests" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalPurchaseOfPartnershipInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="step_StockholdersEquityUnitsExchangedInOfferingShares" abstract="false" name="StockholdersEquityUnitsExchangedInOfferingShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
</xs:schema>
