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  <xs:element id="ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" abstract="false" name="DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
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  <xs:element id="ptv_RevenueLineItems" abstract="true" name="RevenueLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_RoyaltyIncomeRate" abstract="false" name="RoyaltyIncomeRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ptv_MilestonePaymentReceived" abstract="false" name="MilestonePaymentReceived" 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_CustomerAMember" abstract="true" name="CustomerAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_Over10PercentOfRevenueMember" abstract="true" name="Over10PercentOfRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_WhollyOwnedSegmentMember" abstract="true" name="WhollyOwnedSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ControlledFoundedEntitiesSegmentMember" abstract="true" name="ControlledFoundedEntitiesSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_EstablishmentOfNewEntitiesMember" abstract="true" name="EstablishmentOfNewEntitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeaportMember" abstract="true" name="SeaportMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_NumberOfReportableSegment" abstract="false" name="NumberOfReportableSegment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_NumberOfEntitiesEstablished" abstract="false" name="NumberOfEntitiesEstablished" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_ParentCompanyAndOtherMember" abstract="true" name="ParentCompanyAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_CashAndCashEquivalentsAndShortTermInvestments" abstract="false" name="CashAndCashEquivalentsAndShortTermInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_InvestmentsHeldAtFairValueTable" abstract="true" name="InvestmentsHeldAtFairValueTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_AkiliMember" abstract="true" name="AkiliMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_InvestmentsHeldAtFairValueLineItems" abstract="true" name="InvestmentsHeldAtFairValueLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NonCurrentFinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationOfEquityMethodLoss" abstract="false" name="NonCurrentFinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationOfEquityMethodLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_EquityMethodLossRecordedAgainstLTI" abstract="false" name="EquityMethodLossRecordedAgainstLTI" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinancialInvestmentsGainLossRecognisedThroughProfitLossWhenControlOfSubsidiaryIsLost" abstract="false" name="FinancialInvestmentsGainLossRecognisedThroughProfitLossWhenControlOfSubsidiaryIsLost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinancialInvestmentsGainLossRecognizedThroughConversionOfNotesToPreferredShares" abstract="false" name="FinancialInvestmentsGainLossRecognizedThroughConversionOfNotesToPreferredShares" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest" abstract="false" name="ShareOfAssociateLossRecordedAgainstLongTermInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_GainLossOnEquityMethodInvestment" abstract="false" name="GainLossOnEquityMethodInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_VedantaMember" abstract="true" name="VedantaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeriesA1PreferredStockMember" abstract="true" name="SeriesA1PreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeriesA2PreferredStockMember" abstract="true" name="SeriesA2PreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_PreferredStockSeriesBMember" abstract="true" name="PreferredStockSeriesBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeriesAConvertiblePreferredStockMember" abstract="true" name="SeriesAConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeriesPreferredA2AndBMember" abstract="true" name="SeriesPreferredA2AndBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_InvestmentsHeldAtFairValueMember" abstract="true" name="InvestmentsHeldAtFairValueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ConvertiblePromissoryNoteMember" abstract="true" name="ConvertiblePromissoryNoteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_NumberOfSharesIssuedByInvesteeHeldByPureTech" abstract="false" name="NumberOfSharesIssuedByInvesteeHeldByPureTech" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_GainsLossesOnChangeInFairValueOfEquityInvestments" abstract="false" name="GainsLossesOnChangeInFairValueOfEquityInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_InvestmentsHeldAtFairValueNumberOfSharesAcquired" abstract="false" name="InvestmentsHeldAtFairValueNumberOfSharesAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_ConvertiblePreferredStockConversionShares" abstract="false" name="ConvertiblePreferredStockConversionShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_FinancialAssetPrincipalAmount" abstract="false" name="FinancialAssetPrincipalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_NumberOfSharesHeld" abstract="false" name="NumberOfSharesHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_InvestmentSoldPricePerShare" abstract="false" name="InvestmentSoldPricePerShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_ProceedsFromSaleOfEquityInvestment" abstract="false" name="ProceedsFromSaleOfEquityInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SaleOfEquityInstrumentsInOtherEntities" abstract="false" name="SaleOfEquityInstrumentsInOtherEntities" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_ProceedFromTransactionFees" abstract="false" name="ProceedFromTransactionFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_NumberOfAssociateCommonStockHeldAtFairValue" abstract="false" name="NumberOfAssociateCommonStockHeldAtFairValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_ProportionOfOwnershipInterestInInvestee" abstract="false" name="ProportionOfOwnershipInterestInInvestee" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" abstract="false" name="FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_WarrantsNumberOfSecuritiesCalledByWarrants" abstract="false" name="WarrantsNumberOfSecuritiesCalledByWarrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_ExercisePriceOfWarrants" abstract="false" name="ExercisePriceOfWarrants" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_WarrantsExpirationTerm" abstract="false" name="WarrantsExpirationTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_WarrantsFairValue" abstract="false" name="WarrantsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SondeAfterFinancingMember" abstract="true" name="SondeAfterFinancingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_MayWarrantsMember" abstract="true" name="MayWarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_PreferredA1A2AndBMember" abstract="true" name="PreferredA1A2AndBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_GainLossOfEquityMethodInvestment" abstract="false" name="GainLossOfEquityMethodInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_InvestmentPreferredShareHeldAtFairValue" abstract="false" name="InvestmentPreferredShareHeldAtFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_GainLossOfEquityMethodInvestmentGroupShare" abstract="false" name="GainLossOfEquityMethodInvestmentGroupShare" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DisclosureOfAssociatesLineItems" abstract="true" name="DisclosureOfAssociatesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" 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_OtherNetAssetsLiabilities" abstract="false" name="OtherNetAssetsLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_NetAssetsAttributableToShareholdersOfAssociate" abstract="false" name="NetAssetsAttributableToShareholdersOfAssociate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_OpeningNetAssetsLiabilities" abstract="false" name="OpeningNetAssetsLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ClosingNetAssetsLiabilities" abstract="false" name="ClosingNetAssetsLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ShareOfNetAssets" abstract="false" name="ShareOfNetAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_InvestmentsInAssociatesIncreaseUponDeconsolidation" abstract="false" name="InvestmentsInAssociatesIncreaseUponDeconsolidation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_GainOnDilutionOfInterestInAssociate" abstract="false" name="GainOnDilutionOfInterestInAssociate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_UnsecuredPromissoryNoteReceivableMember" abstract="true" name="UnsecuredPromissoryNoteReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeniorSecuredConvertiblePromissoryNoteMember" abstract="true" name="SeniorSecuredConvertiblePromissoryNoteMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ConvertibleNoteReceivableMember" abstract="true" name="ConvertibleNoteReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_NoteReceivableMember" abstract="true" name="NoteReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_NetAssetsFromBankruptcyMember" abstract="true" name="NetAssetsFromBankruptcyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ProceedsFromIssueOfConvertibleNotes" abstract="false" name="ProceedsFromIssueOfConvertibleNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_CurrentReceivableDueFromAssociatesInterestRate" abstract="false" name="CurrentReceivableDueFromAssociatesInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_CurrentReceivablesDueFromAssociatesTermNumberOfBusinessDaysFollowingTheConsummationOfAQualifiedFinancing" abstract="false" name="CurrentReceivablesDueFromAssociatesTermNumberOfBusinessDaysFollowingTheConsummationOfAQualifiedFinancing" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_ConsiderationPaidForIssuanceOfNotesReceivable" abstract="false" name="ConsiderationPaidForIssuanceOfNotesReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FairValueOfWarrants" abstract="false" name="FairValueOfWarrants" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_AcquisitionOfNetAsset" abstract="false" name="AcquisitionOfNetAsset" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DebtInstrumentConvertiblePercentageOfEquityPriceTrigger" abstract="false" name="DebtInstrumentConvertiblePercentageOfEquityPriceTrigger" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_DebtInstrumentPaymentTermNumberOfDaysAfterDebtIncurredFromACertainInvestor" abstract="false" name="DebtInstrumentPaymentTermNumberOfDaysAfterDebtIncurredFromACertainInvestor" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_DeconsolidationGain" abstract="false" name="DeconsolidationGain" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_GainOnDeconsolidation" abstract="false" name="GainOnDeconsolidation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ThirdPartyPayableFromICUponDeconsolidation" abstract="false" name="ThirdPartyPayableFromICUponDeconsolidation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SubsidiaryPreferredShares" abstract="false" name="SubsidiaryPreferredShares" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_OtherAssetsAndLiabilitiesNet" abstract="false" name="OtherAssetsAndLiabilitiesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_DisclosureOfInformationOfEmployeesTable" abstract="true" name="DisclosureOfInformationOfEmployeesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_OperatingExpenseCategoryAxis" abstract="true" name="OperatingExpenseCategoryAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_OperatingExpenseCategoryDomain" abstract="true" name="OperatingExpenseCategoryDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_GeneralAndAdministrativeMember" abstract="true" name="GeneralAndAdministrativeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ResearchAndDevelopmentMember" abstract="true" name="ResearchAndDevelopmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_DisclosureOfInformationOfEmployeesLineItems" abstract="true" name="DisclosureOfInformationOfEmployeesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_PayrollCosts" abstract="false" name="PayrollCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_PayrollTaxes" abstract="false" name="PayrollTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_OtherSellingGeneralAndAdministrativeExpense1" abstract="false" name="OtherSellingGeneralAndAdministrativeExpense1" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_OtherResearchAndDevelopmentExpenses" abstract="false" name="OtherResearchAndDevelopmentExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_AuditOfFinancialStatementsOfAssociates" abstract="false" name="AuditOfFinancialStatementsOfAssociates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_AuditRelatedAssuranceServices" abstract="false" name="AuditRelatedAssuranceServices" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ShareBasedPaymentsTableTable" abstract="true" name="ShareBasedPaymentsTableTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ShareBasedPaymentExpenseCategoryAxis" abstract="true" name="ShareBasedPaymentExpenseCategoryAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_TotalShareBasedPaymentsExpenseCategoryMember" abstract="true" name="TotalShareBasedPaymentsExpenseCategoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ShareBasedPaymentLineItems" abstract="true" name="ShareBasedPaymentLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_A2015PerformanceSharePlanMember" abstract="true" name="A2015PerformanceSharePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_A2023PerformanceSharePlanMember" abstract="true" name="A2023PerformanceSharePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_PerformanceSharePlanMember" abstract="true" name="PerformanceSharePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_PerformanceMarketAndServiceBasedRSUMember" abstract="true" name="PerformanceMarketAndServiceBasedRSUMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_PerformanceBasedRSUMember" abstract="true" name="PerformanceBasedRSUMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_StockOptionsMember" abstract="true" name="StockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_StockIncentivePlanMember" abstract="true" name="StockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_GallopOncologyMember" abstract="true" name="GallopOncologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_AllSubsidiariesMember" abstract="true" name="AllSubsidiariesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ShareBasedPaymentsTableLineItems" abstract="true" name="ShareBasedPaymentsTableLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ShareBasedPaymentArrangementsAuthorizedAmountPercentageOfCommonSharesOutstanding" abstract="false" name="ShareBasedPaymentArrangementsAuthorizedAmountPercentageOfCommonSharesOutstanding" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_ShareBasedPaymentArrangementsAwardVestingPeriod" abstract="false" name="ShareBasedPaymentArrangementsAwardVestingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_EmployeeStockOwnershipPlanESOPExpirationPeriod" abstract="false" name="EmployeeStockOwnershipPlanESOPExpirationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardSettlementPricePerShare" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardSettlementPricePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_ValuationTechniquePerformanceStockPricingModelNumberOfSimulations" abstract="false" name="ValuationTechniquePerformanceStockPricingModelNumberOfSimulations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_ExpenseIncomeInRespectOfRSULiabilityAward" abstract="false" name="ExpenseIncomeInRespectOfRSULiabilityAward" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_CurrentLiabilitiesFromShareBasedPaymentTransactions" abstract="false" name="CurrentLiabilitiesFromShareBasedPaymentTransactions" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_ShareBasedPaymentArrangementExpirationPeriod" abstract="false" name="ShareBasedPaymentArrangementExpirationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_TimeBasedRSUsMember" abstract="true" name="TimeBasedRSUsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_PerformanceBasedRSUsMember" abstract="true" name="PerformanceBasedRSUsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_RestrictedShareUnitsRSUMember" abstract="true" name="RestrictedShareUnitsRSUMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ShareBasedArrangementRollForward" abstract="true" name="ShareBasedArrangementRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_WeightedAverageGrantDateFairValueRollForward" abstract="true" name="WeightedAverageGrantDateFairValueRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsOutstandingInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsOutstandingInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsForfeitedInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsForfeitedInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_NumberOfShareOptionsForfeitedAndExpiredInShareBasedPaymentArrangement" abstract="false" name="NumberOfShareOptionsForfeitedAndExpiredInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_WeightedAverageExercisePriceOfShareOptionsForfeitedAndExpiredInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageExercisePriceOfShareOptionsForfeitedAndExpiredInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable" abstract="false" name="WeightedAverageRemainingContractualLifeOfOptionsExcisable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_WeightedAverageStockPriceOfShareOptionsExercisedInShareBasedPaymentArrangement" abstract="false" name="WeightedAverageStockPriceOfShareOptionsExercisedInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_ExercisePriceRangeOneMember" abstract="true" name="ExercisePriceRangeOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ExercisePriceRangeTwoMember" abstract="true" name="ExercisePriceRangeTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ExercisePriceRangeThreeMember" abstract="true" name="ExercisePriceRangeThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ExercisePriceRangeFourMember" abstract="true" name="ExercisePriceRangeFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SubsidiaryPlansTable" abstract="true" name="SubsidiaryPlansTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SubsidiaryPlansLineItems" abstract="true" name="SubsidiaryPlansLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NumberOfShareOptionsDeconsolidatedInShareBasedPaymentArrangement" abstract="false" name="NumberOfShareOptionsDeconsolidatedInShareBasedPaymentArrangement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_WeightedAverageOptionsOutstandingTable" abstract="true" name="WeightedAverageOptionsOutstandingTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_WeightedAverageOptionsOutstandingLineItems" abstract="true" name="WeightedAverageOptionsOutstandingLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_FinanceIncomeAbstract" abstract="true" name="FinanceIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_InterestIncomeFromFinancialAssets" abstract="false" name="InterestIncomeFromFinancialAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinanceCostsAbstract" abstract="true" name="FinanceCostsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ContractualInterestExpenseOnNotes" abstract="false" name="ContractualInterestExpenseOnNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_GainOnForgivenessOfDebt" abstract="false" name="GainOnForgivenessOfDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_GainLossFromChangeInFairValueOfWarrantLiability" abstract="false" name="GainLossFromChangeInFairValueOfWarrantLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_GainLossFromChangeInFairValueOfPreferredShares" abstract="false" name="GainLossFromChangeInFairValueOfPreferredShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_NumeratorAbstract" abstract="true" name="NumeratorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DenominatorAbstract" abstract="true" name="DenominatorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DilutiveEffectOfAllInstrumentsOnWeightedAverageNumberOfOrdinarySharesIncludingEffectOfTreasurySharesPurchasedAndCancelled" abstract="false" name="DilutiveEffectOfAllInstrumentsOnWeightedAverageNumberOfOrdinarySharesIncludingEffectOfTreasurySharesPurchasedAndCancelled" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_IncreaseDecreaseFromAdjustmentToLossOfControlOfSubsidiaryIntangibleAssetsOtherThanGoodwill" abstract="false" name="IncreaseDecreaseFromAdjustmentToLossOfControlOfSubsidiaryIntangibleAssetsOtherThanGoodwill" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_NumberOfAssetsWrittenOff" abstract="false" name="NumberOfAssetsWrittenOff" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_EquityAcquiredShareCapitalPureTechLLCTable" abstract="true" name="EquityAcquiredShareCapitalPureTechLLCTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_EquityAcquiredShareCapitalPureTechLLCLineItems" abstract="true" name="EquityAcquiredShareCapitalPureTechLLCLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SeriesA2PreferredSharesMember" abstract="true" name="SeriesA2PreferredSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_JefferiesInternationalLimitedMember" abstract="true" name="JefferiesInternationalLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_NumberOfVotesPerOrdinaryShare" abstract="false" name="NumberOfVotesPerOrdinaryShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_IssuedShareCapitalAcquired" abstract="false" name="IssuedShareCapitalAcquired" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased" abstract="false" name="StockRepurchaseProgramSharesAuthorizedToBeRepurchased" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_StockRepurchaseProgramPricePerShare" abstract="false" name="StockRepurchaseProgramPricePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_StockRepurchaseProgramNumberOfTranches" abstract="false" name="StockRepurchaseProgramNumberOfTranches" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_StockRepurchaseProgramAggregatedNumberOfSharesRepurchased" abstract="false" name="StockRepurchaseProgramAggregatedNumberOfSharesRepurchased" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_NumberOfSharesAcquired" abstract="false" name="NumberOfSharesAcquired" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_NumberOfSharesAcquiredFixedPrice" abstract="false" name="NumberOfSharesAcquiredFixedPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_NumberOfSharesAcquiredPerShare" abstract="false" name="NumberOfSharesAcquiredPerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ptv_SubsidiaryPreferredSharesTable" abstract="true" name="SubsidiaryPreferredSharesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SeriesA1PreferredMember" abstract="true" name="SeriesA1PreferredMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SubsidiaryPreferredSharesMember" abstract="true" name="SubsidiaryPreferredSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SubsidiaryPreferredSharesLineItems" abstract="true" name="SubsidiaryPreferredSharesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ProceedsFromInvestors" abstract="false" name="ProceedsFromInvestors" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ProceedsFromGroup" abstract="false" name="ProceedsFromGroup" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_MinimumLiquidationPreferenceTable" abstract="true" name="MinimumLiquidationPreferenceTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_MinimumLiquidationPreferenceLineItems" abstract="true" name="MinimumLiquidationPreferenceLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_MinimumLiquidationPreference" abstract="false" name="MinimumLiquidationPreference" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_ChangesInTheValueOfSubsidiaryPreferredSharesTable" abstract="true" name="ChangesInTheValueOfSubsidiaryPreferredSharesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" abstract="true" name="ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" abstract="true" name="ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ChangeInFairValue" abstract="false" name="ChangeInFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_Deconsolidation" abstract="false" name="Deconsolidation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SaleOfFutureRoyaltiesLiabilityTable" abstract="true" name="SaleOfFutureRoyaltiesLiabilityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_RoyaltyPharmaMember" abstract="true" name="RoyaltyPharmaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SaleOfFutureRoyaltiesLiabilityLineItems" abstract="true" name="SaleOfFutureRoyaltiesLiabilityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_RoyaltyAgreementAnnualThresholdRoyaltyPaymentMadeToCounterparty" abstract="false" name="RoyaltyAgreementAnnualThresholdRoyaltyPaymentMadeToCounterparty" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RoyaltyAgreementPercentageOfRoyaltiesReceivedAboveAnnualThreshold" abstract="false" name="RoyaltyAgreementPercentageOfRoyaltiesReceivedAboveAnnualThreshold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_RoyaltiesLiabilitiesInitialPaymentReceivedAtClosing" abstract="false" name="RoyaltiesLiabilitiesInitialPaymentReceivedAtClosing" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RoyaltiesLiabilitiesEligibilityToReceiveAdditionalRoyaltyPaymentAmount" abstract="false" name="RoyaltiesLiabilitiesEligibilityToReceiveAdditionalRoyaltyPaymentAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_PaymentToFromRoyaltyPharma" abstract="false" name="PaymentToFromRoyaltyPharma" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SaleOfFutureRoyaltiesLiabilitiesRollForward" abstract="true" name="SaleOfFutureRoyaltiesLiabilitiesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NonCurrentLiabilitiesRoyaltyLiabilities" abstract="false" name="NonCurrentLiabilitiesRoyaltyLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_SeaportVedantaAndSondeMember" abstract="true" name="SeaportVedantaAndSondeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_VedantaAndGelesisMember" abstract="true" name="VedantaAndGelesisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_IssuanceOfPromissoryNoteFairValue" abstract="false" name="IssuanceOfPromissoryNoteFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinancialAssetsAtFairValueBeforeEquityMethodInvestment" abstract="false" name="FinancialAssetsAtFairValueBeforeEquityMethodInvestment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_FinancialAssetsAtFairValueAfterEquityMethodInvestmentLoss" abstract="false" name="FinancialAssetsAtFairValueAfterEquityMethodInvestmentLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_MarketBacksolveOPMMember" abstract="true" name="MarketBacksolveOPMMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_EquityValueMeasurementInputMember" abstract="true" name="EquityValueMeasurementInputMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_EarlyAndLateIPOScenarioProbabilityMember" abstract="true" name="EarlyAndLateIPOScenarioProbabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_FinancialInstrumentsFairValueMeasurementAndClassificationTable" abstract="true" name="FinancialInstrumentsFairValueMeasurementAndClassificationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ShortTermNoteFromAssociateMember" abstract="true" name="ShortTermNoteFromAssociateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ShareBasedLiabiltyAwardsMember" abstract="true" name="ShareBasedLiabiltyAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" abstract="true" name="FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SubsidiaryNotesPayableLoansTable" abstract="true" name="SubsidiaryNotesPayableLoansTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_SubsidiaryNotesPayableMember" abstract="true" name="SubsidiaryNotesPayableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_LoanMember" abstract="true" name="LoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SubsidiaryConvertibleNotesMember" abstract="true" name="SubsidiaryConvertibleNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_LighthouseCapitalPartnersVILPMember" abstract="true" name="LighthouseCapitalPartnersVILPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SubsidiaryNotesPayableLoansLineItems" abstract="true" name="SubsidiaryNotesPayableLoansLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_BorrowingsInterestPeriodInterestRate" abstract="false" name="BorrowingsInterestPeriodInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_BorrowingsRepaymentPeriodInterestRate" abstract="false" name="BorrowingsRepaymentPeriodInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_ConvertibleNotesTable" abstract="true" name="ConvertibleNotesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ConvertibleNotesLineItems" abstract="true" name="ConvertibleNotesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ConvertibleNotesRollForward" abstract="true" name="ConvertibleNotesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_AccruedInterestConvertibleNotes" abstract="false" name="AccruedInterestConvertibleNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_PayoffOfPrincipalInterest" abstract="false" name="PayoffOfPrincipalInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_NonControllingInterestsTable" abstract="true" name="NonControllingInterestsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NonControllingInterestsLineItems" abstract="true" name="NonControllingInterestsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementFullyVested" abstract="false" name="NumberOfOtherEquityInstrumentsGrantedInShareBasedPaymentArrangementFullyVested" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_DisclosureOfInterestsInSubsidiariesTable" abstract="true" name="DisclosureOfInterestsInSubsidiariesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_OtherNonControllingInterestEquity" abstract="false" name="OtherNonControllingInterestEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_OtherPayablesLiabilitySettledShareBasedAwards" abstract="false" name="OtherPayablesLiabilitySettledShareBasedAwards" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_LeasesRentalTable" abstract="true" name="LeasesRentalTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_LeaseContractualTermsAxis" abstract="true" name="LeaseContractualTermsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_LeaseContractualTermsDomain" abstract="true" name="LeaseContractualTermsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_LeaseAt6TideStreetMember" abstract="true" name="LeaseAt6TideStreetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_AlloniaLLCMember" abstract="true" name="AlloniaLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_LeasesRentalLineItems" abstract="true" name="LeasesRentalLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_LeaseLiabilityRentableArea" abstract="false" name="LeaseLiabilityRentableArea" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:areaItemType"/>
  <xs:element id="ptv_LeaseLiabilityLeaseTerm" abstract="false" name="LeaseLiabilityLeaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_LeaseLiabilityNumberOfRenewalPeriods" abstract="false" name="LeaseLiabilityNumberOfRenewalPeriods" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ptv_LeaseLiabilityRenewalTerm" abstract="false" name="LeaseLiabilityRenewalTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_LeaseLiabilitySubleasedArea" abstract="false" name="LeaseLiabilitySubleasedArea" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:areaItemType"/>
  <xs:element id="ptv_LeaseReceivableSubleaseWriteOff" abstract="false" name="LeaseReceivableSubleaseWriteOff" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_LesseeOperatingSubleaseSubleasedArea" abstract="false" name="LesseeOperatingSubleaseSubleasedArea" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:areaItemType"/>
  <xs:element id="ptv_LeaseLiabilityInitialTerm" abstract="false" name="LeaseLiabilityInitialTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ptv_LesseeOperatingSubleaseAnnualLeaseFees" abstract="false" name="LesseeOperatingSubleaseAnnualLeaseFees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_InterestOnUndiscountedLeasePayments" abstract="false" name="InterestOnUndiscountedLeasePayments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_CreditRisk" abstract="false" name="CreditRisk" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_LiquidityRiskTable" abstract="true" name="LiquidityRiskTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_WithinThreeMonthsMember" abstract="true" name="WithinThreeMonthsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_TradeAndOtherPayablesMember" abstract="true" name="TradeAndOtherPayablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_TaxLiabilityMember" abstract="true" name="TaxLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_LiquidityRiskLineItems" abstract="true" name="LiquidityRiskLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_CapitalAndFinancialRiskManagementTable" abstract="true" name="CapitalAndFinancialRiskManagementTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_KarunaVorAndAkiliMember" abstract="true" name="KarunaVorAndAkiliMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_CapitalAndFinancialRiskManagementLineItems" abstract="true" name="CapitalAndFinancialRiskManagementLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_CommitmentsAndContingenciesTable" abstract="true" name="CommitmentsAndContingenciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_CommitmentsAndContingenciesLineItems" abstract="true" name="CommitmentsAndContingenciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_RelatedPartyTransactionsTable" abstract="true" name="RelatedPartyTransactionsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DirectorsAndSeniorManagersMember" abstract="true" name="DirectorsAndSeniorManagersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeniorManagersMember" abstract="true" name="SeniorManagersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_NonexecutiveDirectorsMember" abstract="true" name="NonexecutiveDirectorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_ConvertibleNotesMember" abstract="true" name="ConvertibleNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_RelatedPartyTransactionsLineItems" abstract="true" name="RelatedPartyTransactionsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_InterestIncomeOnSubleaseReceivable" abstract="false" name="InterestIncomeOnSubleaseReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_PercentVotingRightsOfTheCompany" abstract="false" name="PercentVotingRightsOfTheCompany" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_AdditionalNumberOfSharesAuthorizedToPurchase" abstract="false" name="AdditionalNumberOfSharesAuthorizedToPurchase" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_NumberOfSharesIssuableBasedOnPerformanceConditions" abstract="false" name="NumberOfSharesIssuableBasedOnPerformanceConditions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" abstract="true" name="DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_DrRobertLangerMember" abstract="true" name="DrRobertLangerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_DrJohnLaMattinaMember" abstract="true" name="DrJohnLaMattinaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_MicheleHolcombMember" abstract="true" name="MicheleHolcombMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SharonBarberLuiMember" abstract="true" name="SharonBarberLuiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_KiranMazumdarShawMember" abstract="true" name="KiranMazumdarShawMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_DrEricElenkoMember" abstract="true" name="DrEricElenkoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_BusinessOrSourcingCompanyAxis" abstract="true" name="BusinessOrSourcingCompanyAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_BusinessOrSourcingCompanyDomain" abstract="true" name="BusinessOrSourcingCompanyDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_SeaportTherapeuticsMember" abstract="true" name="SeaportTherapeuticsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsLineItems" abstract="true" name="DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_NumberOfOptionsHeld" abstract="false" name="NumberOfOptionsHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ptv_OwnershipInterest" abstract="false" name="OwnershipInterest" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_TaxationTable" abstract="true" name="TaxationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_GrossAmountMember" abstract="true" name="GrossAmountMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_IncomeTaxTypeAxis" abstract="true" name="IncomeTaxTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_IncomeTaxTypeDomain" abstract="true" name="IncomeTaxTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_FederalMember" abstract="true" name="FederalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" abstract="true" name="OperatingLossCarryforwardsExpirationPeriodsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_OperatingLossCarryforwardsExpirationPeriodsDomain" abstract="true" name="OperatingLossCarryforwardsExpirationPeriodsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_OperatingLossCarryforwardsNotSubjectToExpirationMember" abstract="true" name="OperatingLossCarryforwardsNotSubjectToExpirationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_UncertainTaxPositionMember" abstract="true" name="UncertainTaxPositionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_TaxationLineItems" abstract="true" name="TaxationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_PercentageVoteAndValueOfSubsidiariesIncludedInTheGroupConsolidatedFederalTaxReturn" abstract="false" name="PercentageVoteAndValueOfSubsidiariesIncludedInTheGroupConsolidatedFederalTaxReturn" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" abstract="false" name="PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_NetDeferredTaxAssetsNotRecognised" abstract="false" name="NetDeferredTaxAssetsNotRecognised" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RecognisedIncomeTaxExpenseTable" abstract="true" name="RecognisedIncomeTaxExpenseTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_TotalIncomeTaxTypeMember" abstract="true" name="TotalIncomeTaxTypeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_StateMember" abstract="true" name="StateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_RecognisedIncomeTaxExpenseLineItems" abstract="true" name="RecognisedIncomeTaxExpenseLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_EffectsOfStateTaxRateInUSReconciliationOfEffectiveTaxRate" abstract="false" name="EffectsOfStateTaxRateInUSReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RateOfEffectsOfStateTaxRateInUS" abstract="false" name="RateOfEffectsOfStateTaxRateInUS" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_TaxCreditReconciliationOfEffectiveTaxRate" abstract="false" name="TaxCreditReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RateOfTaxCreditsReconciliationOfEffectiveTaxRate" abstract="false" name="RateOfTaxCreditsReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" abstract="false" name="ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" abstract="false" name="RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_FinanceIncomeCostsFairValueAccountingReconciliationOfEffectiveTaxRate" abstract="false" name="FinanceIncomeCostsFairValueAccountingReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RateOfFinanceIncomeCostsFairValueAccountingReconciliationOfEffectiveTaxRate" abstract="false" name="RateOfFinanceIncomeCostsFairValueAccountingReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_LossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" abstract="false" name="LossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RateOfLossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" abstract="false" name="RateOfLossWithRespectToAssociateForWhichNoDeferredTaxAssetIsRecognizedReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_AdjustmentsRelatedToChangeInBlendStateRate" abstract="false" name="AdjustmentsRelatedToChangeInBlendStateRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_TaxRateEffectOfAdjustmentsRelatedToChangeInBlendStateRate" abstract="false" name="TaxRateEffectOfAdjustmentsRelatedToChangeInBlendStateRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate" abstract="false" name="ExecutiveCompensationReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" abstract="false" name="RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <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_TaxRateEffectOfDeferredTaxAssetsAndBenefitsNotPreviouslyRecognised" abstract="false" name="TaxRateEffectOfDeferredTaxAssetsAndBenefitsNotPreviouslyRecognised" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <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_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" abstract="false" name="RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_CancellationOfDebtIncome" abstract="false" name="CancellationOfDebtIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_CancellationOfDebtIncomePercentages" abstract="false" name="CancellationOfDebtIncomePercentages" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ptv_CurrentYearLossesAndCreditsForWhichNoDeferredTaxAssetIsRecognizedAmount" abstract="false" name="CurrentYearLossesAndCreditsForWhichNoDeferredTaxAssetIsRecognizedAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_CurrentYearLossesAndCreditsForWhichNoDeferredTaxAssetIsRecognizedPercent" abstract="false" name="CurrentYearLossesAndCreditsForWhichNoDeferredTaxAssetIsRecognizedPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ptv_UncertainTaxPositionsAmount" abstract="false" name="UncertainTaxPositionsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_UncertainTaxPositionsPercent" abstract="false" name="UncertainTaxPositionsPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ptv_StockDeductionReconciliationOfEffectiveTaxRate" abstract="false" name="StockDeductionReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ptv_TaxRateEffectOfStockDeductionReconciliationOfEffectiveTaxRate" abstract="false" name="TaxRateEffectOfStockDeductionReconciliationOfEffectiveTaxRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ptv_DeferredTaxAssetsAndLiabilitiesTable" abstract="true" name="DeferredTaxAssetsAndLiabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ShareBasedPaymentsMember" abstract="true" name="ShareBasedPaymentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_CapitalizedResearchAndExperimentalExpendituresMember" abstract="true" name="CapitalizedResearchAndExperimentalExpendituresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_FutureRoyaltiesMember" abstract="true" name="FutureRoyaltiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_InvestmentInAssociatesMember" abstract="true" name="InvestmentInAssociatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_DeferredTaxAssetsAndLiabilitiesLineItems" abstract="true" name="DeferredTaxAssetsAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_UnrecognizedDeferredTaxAssetsTable" abstract="true" name="UnrecognizedDeferredTaxAssetsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_TaxEffectedMember" abstract="true" name="TaxEffectedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_UnrecognizedDeferredTaxAssetsLineItems" abstract="true" name="UnrecognizedDeferredTaxAssetsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ptv_TaxLossesAndTaxCreditsCarryforwardsTable" abstract="true" name="TaxLossesAndTaxCreditsCarryforwardsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ExpiringAxis" abstract="true" name="ExpiringAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ptv_ExpiringDomain" abstract="true" name="ExpiringDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_NotLaterThan10YearsMember" abstract="true" name="NotLaterThan10YearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_AvailableIndefinitelyMember" abstract="true" name="AvailableIndefinitelyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ptv_TaxLossesAndTaxCreditsCarryforwardsLineItems" abstract="true" name="TaxLossesAndTaxCreditsCarryforwardsLineItems" 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_IncomeTaxPayable" abstract="false" name="IncomeTaxPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
