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  <xs:element id="ptv_IssuanceOfNoteReceivable" abstract="false" name="IssuanceOfNoteReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ptv_DrRajuKucherlapatiMember" abstract="true" name="DrRajuKucherlapatiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="ptv_EquityAcquiredShareCapitalPureTechLLCTable" abstract="true" name="EquityAcquiredShareCapitalPureTechLLCTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
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  <xs:element id="ptv_IncreaseDecreaseInNumberOfSharesOutstandingChangesInOwnershipInterestInSubsidiariesThatDoNotResultInLossOfControl" abstract="false" name="IncreaseDecreaseInNumberOfSharesOutstandingChangesInOwnershipInterestInSubsidiariesThatDoNotResultInLossOfControl" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnPreTaxEarnings" abstract="false" name="SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableImpactOnPreTaxEarnings" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
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  <xs:element id="ptv_ShareBasedPaymentArrangementsAuthorizedAmountPercentageOfCommonSharesOutstanding" abstract="false" name="ShareBasedPaymentArrangementsAuthorizedAmountPercentageOfCommonSharesOutstanding" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ptv_PercentVotingRightsOfTheCompany" abstract="false" name="PercentVotingRightsOfTheCompany" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ptv_WeightedAverageNumberOfOrdinarySharesLineItems" abstract="true" name="WeightedAverageNumberOfOrdinarySharesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SummaryOfMinimumLiquidationPreferenceTextBlock" abstract="false" name="SummaryOfMinimumLiquidationPreferenceTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_StockOptionsMember" abstract="true" name="StockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_BorrowingsInterestPaid" abstract="false" name="BorrowingsInterestPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_AccountingPoliciesSubsidiariesTable" abstract="true" name="AccountingPoliciesSubsidiariesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DisclosureOfWeightedAverageExercisePricesForOptionsExercisableTextBlock" abstract="false" name="DisclosureOfWeightedAverageExercisePricesForOptionsExercisableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_LighthouseCapitalPartnersVILPMember" abstract="true" name="LighthouseCapitalPartnersVILPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_DisclosureOfPayrollCostsTextBlock" abstract="false" name="DisclosureOfPayrollCostsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesApprovedForIssuance" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesApprovedForIssuance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_EnlightMember" abstract="true" name="EnlightMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_DistributionToTalShareholders" abstract="false" name="DistributionToTalShareholders" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ExpiringAxis" abstract="true" name="ExpiringAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_EnsofHoldingsLLCMember" abstract="true" name="EnsofHoldingsLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_ScheduleOfPropertyEquipmentNetTextBlock" abstract="false" name="ScheduleOfPropertyEquipmentNetTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_IncreaseDecreaseInReclassificationOfEquitySettledAwardsIntoLiabilityAwards" abstract="false" name="IncreaseDecreaseInReclassificationOfEquitySettledAwardsIntoLiabilityAwards" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_OxfordFinanceLLCMember" abstract="true" name="OxfordFinanceLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" abstract="false" name="PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SubsidiaryPreferredSharesTable" abstract="true" name="SubsidiaryPreferredSharesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_WeightedAverageOptionsExercisableAbstract" abstract="true" name="WeightedAverageOptionsExercisableAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NotImpairedLineItems" abstract="true" name="NotImpairedLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_RevenueRecognizedOnDeferredRevenueOutstandingAtPriorYearEnd" abstract="false" name="RevenueRecognizedOnDeferredRevenueOutstandingAtPriorYearEnd" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTextBlock" abstract="false" name="DisclosureOfSubsidiaryShareBasedPaymentPlansTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTextBlock" abstract="false" name="DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_NumberOfSharesOnConversionFromNotes" abstract="false" name="NumberOfSharesOnConversionFromNotes" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_WeightedAverageOptionsExercisableTable" abstract="true" name="WeightedAverageOptionsExercisableTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NonControllingInterestsAbstract" abstract="true" name="NonControllingInterestsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SeriesA2PreferredMember" abstract="true" name="SeriesA2PreferredMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_InterestOnUndiscountedLeasePayments" abstract="false" name="InterestOnUndiscountedLeasePayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_AuditOfFinancialStatementsOfSubsidiaries" abstract="false" name="AuditOfFinancialStatementsOfSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" abstract="true" name="DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_LeaseLiabilitiesTable" abstract="true" name="LeaseLiabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ReconciliationOfEffectiveTaxRateTable" abstract="true" name="ReconciliationOfEffectiveTaxRateTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_Series3GrowthPreferredStockMember" abstract="true" name="Series3GrowthPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_RateOfLossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" abstract="false" name="RateOfLossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="ptv_DisclosureOfShortTermAndLongTermPortionOfLeaseReceivableTextBlock" abstract="false" name="DisclosureOfShortTermAndLongTermPortionOfLeaseReceivableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_PotentialSecuritiesExcludedFromDilutedEPSCalculation" abstract="false" name="PotentialSecuritiesExcludedFromDilutedEPSCalculation" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract" abstract="true" name="RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_WeightedAverageStockPriceOfShareOptionsExercisedInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageStockPriceOfShareOptionsExercisedInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="ptv_FinancialAssetsAtFairValueThroughProfitOrLossAfterAllocationToLongTermInterest" abstract="false" name="FinancialAssetsAtFairValueThroughProfitOrLossAfterAllocationToLongTermInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ProceedsFromIssueOfSharesToNCI" abstract="false" name="ProceedsFromIssueOfSharesToNCI" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinancialInstrumentsWarrantsLineItems" abstract="true" name="FinancialInstrumentsWarrantsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SettlementOfRSUs" abstract="false" name="SettlementOfRSUs" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ProfitLossBeforeTaxPreIFRS9FairValueAccountingFinanceCostsSubsidiaryPreferredSharesShareBasedPaymentExpenseDepreciationOfTangibleAssetsAndAmortizationOfIntangibleAssets" abstract="false" name="ProfitLossBeforeTaxPreIFRS9FairValueAccountingFinanceCostsSubsidiaryPreferredSharesShareBasedPaymentExpenseDepreciationOfTangibleAssetsAndAmortizationOfIntangibleAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ReceiptOfPaymentOfSublease" abstract="false" name="ReceiptOfPaymentOfSublease" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinancialInstrumentsSignificantUnobservableInputsLevel3FairValuePreferredSharesLiabilityTextBlock" abstract="false" name="FinancialInstrumentsSignificantUnobservableInputsLevel3FairValuePreferredSharesLiabilityTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_IncreaseDecreaseThroughPurchaseOfSubsidiaryNonControllingInterestThroughIssuanceOfShares" abstract="false" name="IncreaseDecreaseThroughPurchaseOfSubsidiaryNonControllingInterestThroughIssuanceOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="ptv_ChangeInFairValue" abstract="false" name="ChangeInFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DirectorsAbstract" abstract="true" name="DirectorsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_TradeReceivablesIncomeTaxReceivable" abstract="false" name="TradeReceivablesIncomeTaxReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_GrossAmountMember" abstract="true" name="GrossAmountMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ptv_PerformanceSharePlanLineItems" abstract="true" name="PerformanceSharePlanLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_OutsideInvestorsMember" abstract="true" name="OutsideInvestorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_DeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" abstract="false" name="DeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_EstimatedTimeToExitMeasurementInputMember" abstract="true" name="EstimatedTimeToExitMeasurementInputMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount" abstract="false" name="DebtInstrumentPaymentTermsFinalFeeTriggerAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SubsidiaryConvertibleNotesMember" abstract="true" name="SubsidiaryConvertibleNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" abstract="false" name="BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SubsidiaryNotesPayableLoansTable" abstract="true" name="SubsidiaryNotesPayableLoansTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_IncreaseDecreaseThroughNCIExerciseOfShareBasedAwardsInSubsidiaries" abstract="false" name="IncreaseDecreaseThroughNCIExerciseOfShareBasedAwardsInSubsidiaries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate" abstract="false" name="DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ReclassificationFromLevel3ToLevel1" abstract="false" name="ReclassificationFromLevel3ToLevel1" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_LibraBiosciencesIncMember" abstract="true" name="LibraBiosciencesIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts" abstract="false" name="GainLossOnForeignCurrencyExchangeInFinanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DisclosureOfUnrecognizedTaxLossesAndTaxCreditsDeferredTaxAssetsTextBlock" abstract="false" name="DisclosureOfUnrecognizedTaxLossesAndTaxCreditsDeferredTaxAssetsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="ptv_OperatingExpensesAbstract" abstract="true" name="OperatingExpensesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DisclosureOfAssociatesLineItems" abstract="true" name="DisclosureOfAssociatesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_AdditionalNumberOfSharesAuthorizedToPurchase" abstract="false" name="AdditionalNumberOfSharesAuthorizedToPurchase" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_ScheduleOfContractBalancesTextBlock" abstract="false" name="ScheduleOfContractBalancesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_AcquisitionCost" abstract="false" name="AcquisitionCost" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DisaggregationOfRevenueCustomersOver10OfRevenueTable" abstract="true" name="DisaggregationOfRevenueCustomersOver10OfRevenueTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesWarrantsTextBlock" abstract="false" name="DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesWarrantsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_DisclosureOfLeaseLiabilitiesTextBlock" abstract="false" name="DisclosureOfLeaseLiabilitiesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_InterestExpenseReconciliationOfEffectiveTaxRate" abstract="false" name="InterestExpenseReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsOutstandingInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsOutstandingInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="ptv_RiskFreeInterestRateMeasurementInputMember" abstract="true" name="RiskFreeInterestRateMeasurementInputMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_PurchaseOfNonControllingInterestInConsiderationForIssuanceOfSharesAndOptions" abstract="false" name="PurchaseOfNonControllingInterestInConsiderationForIssuanceOfSharesAndOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FederalMember" abstract="true" name="FederalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_SubsequentEventsTable" abstract="true" name="SubsequentEventsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NumberOfSharesHeld" abstract="false" name="NumberOfSharesHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_PaymentToAcquireShortTermNotesReceivableFromAssociate" abstract="false" name="PaymentToAcquireShortTermNotesReceivableFromAssociate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_CommitmentsAndContingenciesTable" abstract="true" name="CommitmentsAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NonControllingInterestsAndOptionsIssuedToThirdParties" abstract="false" name="NonControllingInterestsAndOptionsIssuedToThirdParties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinancialInstrumentsFairValueMeasurementAndClassificationTable" abstract="true" name="FinancialInstrumentsFairValueMeasurementAndClassificationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsLineItems" abstract="true" name="DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_LiabilitiesFromSharebasedPaymentTransactionsPerformanceAndMarketConditionsMet" abstract="false" name="LiabilitiesFromSharebasedPaymentTransactionsPerformanceAndMarketConditionsMet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_IncreaseDecreaseThroughVestingOfRSUEquity" abstract="false" name="IncreaseDecreaseThroughVestingOfRSUEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_OtherSellingGeneralAndAdministrativeExpense" abstract="false" name="OtherSellingGeneralAndAdministrativeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ConversionOfSubsidiaryConvertibleNoteIntoSubsidiaryCommonStock" abstract="false" name="ConversionOfSubsidiaryConvertibleNoteIntoSubsidiaryCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_UnusedFederalOrphanDrugTaxCredits" abstract="false" name="UnusedFederalOrphanDrugTaxCredits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ExercisePriceRangeTwoMember" abstract="true" name="ExercisePriceRangeTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_PureTechLYTMember" abstract="true" name="PureTechLYTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_FinancialInstrumentsAbstract" abstract="true" name="FinancialInstrumentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" abstract="true" name="OperatingLossCarryforwardsExpirationPeriodsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ShareBasedLiabiltyAwardsMember" abstract="true" name="ShareBasedLiabiltyAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ptv_ResTORbioMember" abstract="true" name="ResTORbioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_ConversionToPreferred" abstract="false" name="ConversionToPreferred" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ptv_IssuanceOfWarrants" abstract="false" name="IssuanceOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ptv_LossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" abstract="false" name="LossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions" abstract="false" name="NonCurrentLiabilitiesFromShareBasedPaymentTransactions" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ptv_SignificantSubsidiaryPlanVedanta2010PlanRangeOfAssumptionsOfFairValueOfStockOptionGrantsTextBlock" abstract="false" name="SignificantSubsidiaryPlanVedanta2010PlanRangeOfAssumptionsOfFairValueOfStockOptionGrantsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="ptv_OperatingLossCarryforwardsNotSubjectToExpirationMember" abstract="true" name="OperatingLossCarryforwardsNotSubjectToExpirationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="ptv_CashDistribution" abstract="false" name="CashDistribution" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
