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    <link:label id="lab_ptv_IncomeTaxTypeAxis_2a5c3ae7-4085-446a-be75-a7cf79faf5db_terseLabel_en-US" xlink:label="lab_ptv_IncomeTaxTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Type [Axis]</link:label>
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    <link:label id="lab_ptv_IncomeTaxTypeAxis_documentation_en-US" xlink:label="lab_ptv_IncomeTaxTypeAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Tax Type</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LevelsOfFairValueHierarchyAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis"/>
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    <link:label id="lab_ptv_ExercisePriceRangeOneMember_label_en-US" xlink:label="lab_ptv_ExercisePriceRangeOneMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range One [Member]</link:label>
    <link:label id="lab_ptv_ExercisePriceRangeOneMember_documentation_en-US" xlink:label="lab_ptv_ExercisePriceRangeOneMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range One [Member]</link:label>
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    <link:label id="lab_ifrs-full_ResearchAndDevelopmentExpense_b05cea37-8209-4aa8-bb37-646c0275872e_negatedLabel_en-US" xlink:label="lab_ifrs-full_ResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and development expenses</link:label>
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    <link:label id="lab_ifrs-full_ResearchAndDevelopmentExpense_853714ce-f2f8-4272-9b5e-73d84fa3b9e4_terseLabel_en-US" xlink:label="lab_ifrs-full_ResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and development expenses</link:label>
    <link:label id="lab_ifrs-full_ResearchAndDevelopmentExpense_label_en-US" xlink:label="lab_ifrs-full_ResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and development expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ResearchAndDevelopmentExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ResearchAndDevelopmentExpense"/>
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    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfConvertibleDebt_98d20498-5087-4fd4-810c-80bbb88cff8c_terseLabel_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfConvertibleDebt" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(loss) from change in fair value of convertible debt</link:label>
    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfConvertibleDebt_label_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfConvertibleDebt" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(Loss) from change in fair value of convertible debt</link:label>
    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfConvertibleDebt_documentation_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfConvertibleDebt" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(Loss) from change in fair value of convertible debt</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_GainLossFromChangeInFairValueOfConvertibleDebt" xlink:href="ptv-20221231.xsd#ptv_GainLossFromChangeInFairValueOfConvertibleDebt"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_GainLossFromChangeInFairValueOfConvertibleDebt" xlink:to="lab_ptv_GainLossFromChangeInFairValueOfConvertibleDebt" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_aa7edce8-d8a3-4da1-9abc-3273a17e9081_negatedLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchases of intangible assets</link:label>
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    <link:label id="lab_ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate_6e9c0cfa-4739-4c97-99b5-750d034d6dd5_terseLabel_en-US" xlink:label="lab_ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition of equity instruments in other entities, discount rate</link:label>
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    <link:label id="lab_ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate_documentation_en-US" xlink:label="lab_ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition of Equity Instruments In Other Entities, Discount Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate" xlink:href="ptv-20221231.xsd#ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate" xlink:to="lab_ptv_AcquisitionOfEquityInstrumentsInOtherEntitiesDiscountRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate_4263afd7-0705-442e-a8b1-88644c199fd1_terseLabel_en-US" xlink:label="lab_ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive Compensation</link:label>
    <link:label id="lab_ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate_label_en-US" xlink:label="lab_ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive compensation, reconciliation of effective tax rate</link:label>
    <link:label id="lab_ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive compensation, reconciliation of effective tax rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_ExecutiveCompensationReconciliationOfEffectiveTaxRate"/>
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    <link:label id="lab_ptv_TaxEffectedMember_183f1783-2289-4125-9812-86a9b5dff139_terseLabel_en-US" xlink:label="lab_ptv_TaxEffectedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Effected</link:label>
    <link:label id="lab_ptv_TaxEffectedMember_label_en-US" xlink:label="lab_ptv_TaxEffectedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Effected [Member]</link:label>
    <link:label id="lab_ptv_TaxEffectedMember_documentation_en-US" xlink:label="lab_ptv_TaxEffectedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Effected</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TaxEffectedMember" xlink:href="ptv-20221231.xsd#ptv_TaxEffectedMember"/>
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    <link:label id="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsLineItems_87d9a76c-efc8-4855-84c6-465b918d5421_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_c8224c99-e1b9-43f2-b2d7-3afaef60ff36_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from investing activities:</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) investing activities [abstract]</link:label>
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    <link:label id="lab_ptv_WithinThreeMonthsMember_51b04a86-2c99-4476-92cc-f30420cda1d3_terseLabel_en-US" xlink:label="lab_ptv_WithinThreeMonthsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Within Three Months</link:label>
    <link:label id="lab_ptv_WithinThreeMonthsMember_label_en-US" xlink:label="lab_ptv_WithinThreeMonthsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Within Three Months [Member]</link:label>
    <link:label id="lab_ptv_WithinThreeMonthsMember_documentation_en-US" xlink:label="lab_ptv_WithinThreeMonthsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Within Three Months</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WithinThreeMonthsMember" xlink:href="ptv-20221231.xsd#ptv_WithinThreeMonthsMember"/>
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    <link:label id="lab_ptv_NonControlledFoundedEntitiesMember_e969575b-dec9-4c7f-8ca6-286abec28f4d_terseLabel_en-US" xlink:label="lab_ptv_NonControlledFoundedEntitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlled founded entities</link:label>
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    <link:label id="lab_ptv_NonControlledFoundedEntitiesMember_documentation_en-US" xlink:label="lab_ptv_NonControlledFoundedEntitiesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlled Founded Entities</link:label>
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    <link:label id="lab_ifrs-full_DeferredTaxAssets_406873bb-62a7-4122-bdf6-a6285d1414fb_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxAssets_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DeferredTaxAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DeferredTaxAssets" xlink:to="lab_ifrs-full_DeferredTaxAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfIncomeTaxExplanatory_3a6aae73-80b3-4d20-95e5-4d5bffc1bd12_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfIncomeTaxExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of income tax [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIncomeTaxExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:to="lab_ifrs-full_DisclosureOfIncomeTaxExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EntregaAndVedantaMember_ff0af684-6ee5-4cfe-9d3b-09be7f9420d8_terseLabel_en-US" xlink:label="lab_ptv_EntregaAndVedantaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entrega and Vedanta</link:label>
    <link:label id="lab_ptv_EntregaAndVedantaMember_label_en-US" xlink:label="lab_ptv_EntregaAndVedantaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entrega and Vedanta [Member]</link:label>
    <link:label id="lab_ptv_EntregaAndVedantaMember_documentation_en-US" xlink:label="lab_ptv_EntregaAndVedantaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entrega and Vedanta</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EntregaAndVedantaMember" xlink:href="ptv-20221231.xsd#ptv_EntregaAndVedantaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EntregaAndVedantaMember" xlink:to="lab_ptv_EntregaAndVedantaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_MinimumLiquidationPreference_dc21ea2d-557c-47a7-a066-2924c9296910_terseLabel_en-US" xlink:label="lab_ptv_MinimumLiquidationPreference" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreference_label_en-US" xlink:label="lab_ptv_MinimumLiquidationPreference" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreference_documentation_en-US" xlink:label="lab_ptv_MinimumLiquidationPreference" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_MinimumLiquidationPreference" xlink:href="ptv-20221231.xsd#ptv_MinimumLiquidationPreference"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_MinimumLiquidationPreference" xlink:to="lab_ptv_MinimumLiquidationPreference" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_fc6733d6-79c0-4b5d-b2f0-0eb0705f2c3d_netLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property and equipment, net</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_8fc7d4e3-40db-49f6-a262-176f01e8c6a9_periodStartLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of period</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_5645b46b-9b54-4f69-8f26-bd4b9d79e6a0_periodEndLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at end of period</link:label>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipment" xlink:to="lab_ifrs-full_PropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GeographicalAreasMember_ab36ea18-b5b5-4107-bd69-d3eb75d8d288_terseLabel_en-US" xlink:label="lab_ifrs-full_GeographicalAreasMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical areas [member]</link:label>
    <link:label id="lab_ifrs-full_GeographicalAreasMember_label_en-US" xlink:label="lab_ifrs-full_GeographicalAreasMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical areas [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GeographicalAreasMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GeographicalAreasMember" xlink:to="lab_ifrs-full_GeographicalAreasMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding_f6378997-02bf-488e-9441-2205dac79b89_terseLabel_en-US" xlink:label="lab_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Final fee, percentage of original principal amount outstanding</link:label>
    <link:label id="lab_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding_label_en-US" xlink:label="lab_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt instrument, payment terms, final fee, percentage of original principal amount outstanding</link:label>
    <link:label id="lab_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding_documentation_en-US" xlink:label="lab_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt instrument, payment terms, final fee, percentage of original principal amount outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding" xlink:href="ptv-20221231.xsd#ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding" xlink:to="lab_ptv_DebtInstrumentPaymentTermsFinalFeePercentageOfOriginalPrincipalAmountOutstanding" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement_1a68e27a-b243-420a-bb9d-310f69867b93_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average grant date fair value, RSU vested (in GBP per share)</link:label>
    <link:label id="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement_label_en-US" xlink:label="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average grant date fair value of other equity instruments Vested in share-based payment arrangement</link:label>
    <link:label id="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement_documentation_en-US" xlink:label="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average grant date fair value of other equity instruments Vested in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" xlink:to="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsVestedInShareBasedPaymentArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsequentEventsLineItems_845b2d2b-d9a8-4d60-ad8e-d0bf55152979_terseLabel_en-US" xlink:label="lab_ptv_SubsequentEventsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Events [Line Items]</link:label>
    <link:label id="lab_ptv_SubsequentEventsLineItems_label_en-US" xlink:label="lab_ptv_SubsequentEventsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Events [Line Items]</link:label>
    <link:label id="lab_ptv_SubsequentEventsLineItems_documentation_en-US" xlink:label="lab_ptv_SubsequentEventsLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Events</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsequentEventsLineItems" xlink:href="ptv-20221231.xsd#ptv_SubsequentEventsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsequentEventsLineItems" xlink:to="lab_ptv_SubsequentEventsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract_label_en-US" xlink:label="lab_ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of share capital, reserves and other equity interest [Abstract]</link:label>
    <link:label id="lab_ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract_documentation_en-US" xlink:label="lab_ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of share capital, reserves and other equity interest [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract" xlink:href="ptv-20221231.xsd#ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract" xlink:to="lab_ptv_DisclosureofsharecapitalreservesandotherequityinterestAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_438f8a66-ddba-4e9f-be02-aaadc311d88b_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_label_en-US" xlink:label="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other tax effects for reconciliation between accounting profit and tax expense (income)</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:to="lab_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RelatedPartiesMember_248c90d9-dbad-45f7-b180-7ed7633a655b_terseLabel_en-US" xlink:label="lab_ifrs-full_RelatedPartiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related parties</link:label>
    <link:label id="lab_ifrs-full_RelatedPartiesMember_label_en-US" xlink:label="lab_ifrs-full_RelatedPartiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related parties [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RelatedPartiesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RelatedPartiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RelatedPartiesMember" xlink:to="lab_ifrs-full_RelatedPartiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_762f0545-a028-4cf3-a3fd-cbc7a42368a5_verboseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Options exercisable (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_89d9bd04-9c3e-4b92-b340-d5b4c18acdaf_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of options (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_label_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options exercisable in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:to="lab_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentInformationLineItems_4757e6bb-7020-47fa-bd2f-7d074361bf9f_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document and Entity Information [Line Items]</link:label>
    <link:label id="lab_dei_DocumentInformationLineItems_label_en-US" xlink:label="lab_dei_DocumentInformationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Information [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentInformationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationLineItems" xlink:to="lab_dei_DocumentInformationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_OtherNotIncludingVedantaMember_6e51720a-b4ab-4cad-a66f-199348e33fda_terseLabel_en-US" xlink:label="lab_ptv_OtherNotIncludingVedantaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other not including Vedanta</link:label>
    <link:label id="lab_ptv_OtherNotIncludingVedantaMember_label_en-US" xlink:label="lab_ptv_OtherNotIncludingVedantaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other not including Vedanta [Member]</link:label>
    <link:label id="lab_ptv_OtherNotIncludingVedantaMember_documentation_en-US" xlink:label="lab_ptv_OtherNotIncludingVedantaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other not including Vedanta</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OtherNotIncludingVedantaMember" xlink:href="ptv-20221231.xsd#ptv_OtherNotIncludingVedantaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_OtherNotIncludingVedantaMember" xlink:to="lab_ptv_OtherNotIncludingVedantaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RelatedPartyTransactionsAbstract_5d23549e-c415-473a-b25d-e8a18b8818ae_terseLabel_en-US" xlink:label="lab_ifrs-full_RelatedPartyTransactionsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related party transactions [abstract]</link:label>
    <link:label id="lab_ifrs-full_RelatedPartyTransactionsAbstract_label_en-US" xlink:label="lab_ifrs-full_RelatedPartyTransactionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related party transactions [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RelatedPartyTransactionsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RelatedPartyTransactionsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RelatedPartyTransactionsAbstract" xlink:to="lab_ifrs-full_RelatedPartyTransactionsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromIssuingShares_5ff64379-55f5-40e3-871a-13fa73bce229_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssuingShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from the issuance of shares and subsidiary preferred shares</link:label>
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    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithPartiesOtherThanEmployees_c6a8ec7a-fe09-430f-9503-e73b7efa5a68_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithPartiesOtherThanEmployees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment expense</link:label>
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    <link:label id="lab_ifrs-full_SubsidiariesWithMaterialNoncontrollingInterestsMember_070820ff-27df-4cd9-b795-f0090836c5df_terseLabel_en-US" xlink:label="lab_ifrs-full_SubsidiariesWithMaterialNoncontrollingInterestsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiaries with material non-controlling interests</link:label>
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    <link:label id="lab_ptv_GeneralAndAdministrativeMember_979d14b7-4b95-476d-b77e-011f3f4b5b3c_terseLabel_en-US" xlink:label="lab_ptv_GeneralAndAdministrativeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative</link:label>
    <link:label id="lab_ptv_GeneralAndAdministrativeMember_label_en-US" xlink:label="lab_ptv_GeneralAndAdministrativeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General And Administrative [Member]</link:label>
    <link:label id="lab_ptv_GeneralAndAdministrativeMember_documentation_en-US" xlink:label="lab_ptv_GeneralAndAdministrativeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General And Administrative</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfShareCapitalAxis_58dd0a7d-1ab1-43f8-8385-0ea99942ef8a_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of share capital [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfShareCapitalAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of share capital [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
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    <link:label id="lab_ptv_EquityAcquiredShareCapitalPureTechLLCLineItems_52c2bfb7-b751-4536-90c4-bd2e3062c359_terseLabel_en-US" xlink:label="lab_ptv_EquityAcquiredShareCapitalPureTechLLCLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity - Acquired Share capital PureTech LLC [Line Items]</link:label>
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    <link:label id="lab_ptv_EquityAcquiredShareCapitalPureTechLLCLineItems_documentation_en-US" xlink:label="lab_ptv_EquityAcquiredShareCapitalPureTechLLCLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity - Acquired Share capital PureTech LLC</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EquityAcquiredShareCapitalPureTechLLCLineItems" xlink:href="ptv-20221231.xsd#ptv_EquityAcquiredShareCapitalPureTechLLCLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EquityAcquiredShareCapitalPureTechLLCLineItems" xlink:to="lab_ptv_EquityAcquiredShareCapitalPureTechLLCLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EnsofHoldingsLLCMember_8ceade77-e465-4320-8ee7-6ad3d60e7629_verboseLabel_en-US" xlink:label="lab_ptv_EnsofHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ensof Holdings, LLC (held indirectly through Enlight)</link:label>
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    <link:label id="lab_ptv_EnsofHoldingsLLCMember_documentation_en-US" xlink:label="lab_ptv_EnsofHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ensof Holdings LLC</link:label>
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    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_f742807d-b509-42ee-a093-cdaa6162e9fc_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based compensation arrangement by share-based payment award, award vesting period</link:label>
    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_label_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Period</link:label>
    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_documentation_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" xlink:href="ptv-20221231.xsd#ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod"/>
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    <link:label id="lab_srt_EquityMethodInvesteeNameDomain_ae98a9d8-060d-4748-a718-1629d70f4744_terseLabel_en-US" xlink:label="lab_srt_EquityMethodInvesteeNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment, Name [Domain]</link:label>
    <link:label id="lab_srt_EquityMethodInvesteeNameDomain_label_en-US" xlink:label="lab_srt_EquityMethodInvesteeNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment, Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_EquityMethodInvesteeNameDomain" xlink:to="lab_srt_EquityMethodInvesteeNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_A2018PerformanceBasedRSUMember_1393c9cb-aacc-4a6c-8b4e-a17903d0846d_terseLabel_en-US" xlink:label="lab_ptv_A2018PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2018 performance based RSU</link:label>
    <link:label id="lab_ptv_A2018PerformanceBasedRSUMember_label_en-US" xlink:label="lab_ptv_A2018PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2018 Performance Based RSU [Member]</link:label>
    <link:label id="lab_ptv_A2018PerformanceBasedRSUMember_documentation_en-US" xlink:label="lab_ptv_A2018PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2018 Performance Based RSU</link:label>
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    <link:label id="lab_ptv_WeightedAverageOptionsExercisableTable_bcb1ab27-10b2-463e-a333-95f105c940bc_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable [Table]</link:label>
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    <link:label id="lab_ptv_WeightedAverageOptionsExercisableTable_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsExercisableTable" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsExercisableTable"/>
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    <link:label id="lab_ifrs-full_PercentageOfVotingEquityInterestsAcquired_f964391d-4670-4e78-a2f4-7425974c2e10_terseLabel_en-US" xlink:label="lab_ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of voting equity interests acquired</link:label>
    <link:label id="lab_ifrs-full_PercentageOfVotingEquityInterestsAcquired_label_en-US" xlink:label="lab_ifrs-full_PercentageOfVotingEquityInterestsAcquired" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of voting equity interests acquired</link:label>
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    <link:label id="lab_ptv_OtherFinancialAssetsAbstract_label_en-US" xlink:label="lab_ptv_OtherFinancialAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Financial Assets [Abstract]</link:label>
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    <link:label id="lab_ptv_LeaseLiabilityNumberOfRenewalOptions_555505b8-bd53-4e9c-aef9-3578cf9f1942_terseLabel_en-US" xlink:label="lab_ptv_LeaseLiabilityNumberOfRenewalOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liability, number of renewal options</link:label>
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    <link:label id="lab_ptv_LeaseLiabilityNumberOfRenewalOptions_documentation_en-US" xlink:label="lab_ptv_LeaseLiabilityNumberOfRenewalOptions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability, Number Of Renewal Options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeaseLiabilityNumberOfRenewalOptions" xlink:href="ptv-20221231.xsd#ptv_LeaseLiabilityNumberOfRenewalOptions"/>
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    <link:label id="lab_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems_536986dc-1b56-4b04-8ed9-bc26184af813_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities [line items]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfBorrowingCostsExplanatory_55188e8d-464e-4739-9a28-383df619de2c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfBorrowingCostsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of long-term loan - Vedanta</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossFromContinuingOperations_c8e26218-2d8f-4354-8fac-cc3dc9ec2a07_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossFromContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss from continuing operations (100%)</link:label>
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    <link:label id="lab_ifrs-full_GeographicalAreasAxis_17b60e06-148e-49d4-9210-ecb0d2fb1824_terseLabel_en-US" xlink:label="lab_ifrs-full_GeographicalAreasAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Geographical areas [axis]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GeographicalAreasAxis" xlink:to="lab_ifrs-full_GeographicalAreasAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock_7bc8c94f-a301-4482-a259-7f18a5febec0_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of tax balances as presented in statement of financial position</link:label>
    <link:label id="lab_ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of tax balances as presented in Statement of Financial Position [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of tax balances as presented in Statement of Financial Position</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfTaxBalancesAsPresentedInStatementOfFinancialPositionTableTextBlock"/>
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    <link:label id="lab_ifrs-full_DisclosureOfAuditorsRemunerationExplanatory_527affc2-ccf4-48d5-8f98-8e360b3c1e77_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of auditors' remuneration</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfAuditorsRemunerationExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfAuditorsRemunerationExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of auditors' remuneration [text block]</link:label>
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    <link:label id="lab_ifrs-full_NoncurrentFinanceLeaseReceivables_fcd152f1-02d0-4a5f-ae3b-567491449517_verboseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease receivable &#8211; long-term</link:label>
    <link:label id="lab_ifrs-full_NoncurrentFinanceLeaseReceivables_cefbcfda-f900-4c94-a4b8-a25ac7c8f9e1_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Portion of Lease Receivable</link:label>
    <link:label id="lab_ifrs-full_NoncurrentFinanceLeaseReceivables_label_en-US" xlink:label="lab_ifrs-full_NoncurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current finance lease receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentFinanceLeaseReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentFinanceLeaseReceivables"/>
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    <link:label id="lab_ptv_OtherNonControllingInterestEquity_4fd3b836-5136-4e2c-9f19-b049853d1999_terseLabel_en-US" xlink:label="lab_ptv_OtherNonControllingInterestEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ptv_OtherNonControllingInterestEquity_label_en-US" xlink:label="lab_ptv_OtherNonControllingInterestEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other, non-controlling interest, equity</link:label>
    <link:label id="lab_ptv_OtherNonControllingInterestEquity_documentation_en-US" xlink:label="lab_ptv_OtherNonControllingInterestEquity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other, non-controlling interest, equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OtherNonControllingInterestEquity" xlink:href="ptv-20221231.xsd#ptv_OtherNonControllingInterestEquity"/>
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    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock_6286ac95-032f-4bc2-8b01-a90d3b20001f_terseLabel_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Basis of Presentation</link:label>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock_label_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description Of Accounting Policy For Basis Of Presentation [Policy Text Block]</link:label>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock_documentation_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description Of Accounting Policy For Basis Of Presentation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock" xlink:href="ptv-20221231.xsd#ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock" xlink:to="lab_ptv_DescriptionOfAccountingPolicyForBasisOfPresentationPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems_d9b0c9ef-4b42-426d-81a6-fca504d4866d_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:to="lab_ifrs-full_DisclosureOfFinancialAssetsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory_62eb966f-77a0-49e2-b08b-2a77a95847ae_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:to="lab_ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeReceivablesMember_5e8337fc-daa9-4813-9e97-e5edb4cf48c5_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeReceivablesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables</link:label>
    <link:label id="lab_ifrs-full_TradeReceivablesMember_label_en-US" xlink:label="lab_ifrs-full_TradeReceivablesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade receivables [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeReceivablesMember" xlink:to="lab_ifrs-full_TradeReceivablesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_GelesisMember_504950b8-b36b-4318-924d-66638c0db395_verboseLabel_en-US" xlink:label="lab_ptv_GelesisMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gelesis, Inc.</link:label>
    <link:label id="lab_ptv_GelesisMember_a228d01b-67f3-4394-b5f1-2b1de0106071_terseLabel_en-US" xlink:label="lab_ptv_GelesisMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gelesis</link:label>
    <link:label id="lab_ptv_GelesisMember_label_en-US" xlink:label="lab_ptv_GelesisMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gelesis [Member]</link:label>
    <link:label id="lab_ptv_GelesisMember_documentation_en-US" xlink:label="lab_ptv_GelesisMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gelesis</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_GelesisMember" xlink:href="ptv-20221231.xsd#ptv_GelesisMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_GelesisMember" xlink:to="lab_ptv_GelesisMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate_cbbf09dc-9293-4b84-965c-784a3f38a723_negatedTerseLabel_en-US" xlink:label="lab_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sonde Deconsolidation</link:label>
    <link:label id="lab_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate_label_en-US" xlink:label="lab_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of deconsolidation adjustments, reconciliation of effective tax rate</link:label>
    <link:label id="lab_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of deconsolidation adjustments, reconciliation of effective tax rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:to="lab_ptv_RateOfDeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShortTermNoteLineItems_bec294b4-dd15-4478-a689-af8680f826c0_terseLabel_en-US" xlink:label="lab_ptv_ShortTermNoteLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Line Items]</link:label>
    <link:label id="lab_ptv_ShortTermNoteLineItems_label_en-US" xlink:label="lab_ptv_ShortTermNoteLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Line Items]</link:label>
    <link:label id="lab_ptv_ShortTermNoteLineItems_documentation_en-US" xlink:label="lab_ptv_ShortTermNoteLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShortTermNoteLineItems" xlink:href="ptv-20221231.xsd#ptv_ShortTermNoteLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShortTermNoteLineItems" xlink:to="lab_ptv_ShortTermNoteLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems_10f58d2a-657b-45aa-bebb-a395f3d6ee60_terseLabel_en-US" xlink:label="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in the value of subsidiary preferred shares [Line Items]</link:label>
    <link:label id="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems_label_en-US" xlink:label="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in the value of subsidiary preferred shares [Line Items]</link:label>
    <link:label id="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems_documentation_en-US" xlink:label="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in the value of subsidiary preferred shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" xlink:href="ptv-20221231.xsd#ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" xlink:to="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory_45a7893a-8549-49ff-abee-e6b46ca5aa98_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Foreign Currency</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for foreign currency translation [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LongtermBorrowings_32aa69c0-2bff-4b92-b819-1d03e5a379cb_terseLabel_en-US" xlink:label="lab_ifrs-full_LongtermBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan</link:label>
    <link:label id="lab_ifrs-full_LongtermBorrowings_label_en-US" xlink:label="lab_ifrs-full_LongtermBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current portion of non-current borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LongtermBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LongtermBorrowings" xlink:to="lab_ifrs-full_LongtermBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentAssets_94c556a6-12d8-4bd8-ab3d-7085cdc2d7e7_totalLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total non-current assets</link:label>
    <link:label id="lab_ifrs-full_NoncurrentAssets_bd2cff9f-6b18-4d05-bf67-5627a27ed6c4_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current assets</link:label>
    <link:label id="lab_ifrs-full_NoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_NoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentAssets" xlink:to="lab_ifrs-full_NoncurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsTable_0d05a696-3842-4376-bd25-bb23ebee29b8_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about intangible assets [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about intangible assets [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:to="lab_ifrs-full_DisclosureOfIntangibleAssetsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOtherAssetsExplanatory_d5e9c05e-1081-4746-9887-8ec8cc65d540_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Financial Assets</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOtherAssetsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other assets [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfOtherAssetsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfOtherAssetsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate_d5d667c6-fc1f-43b9-b959-51fb861a606e_terseLabel_en-US" xlink:label="lab_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest Expense</link:label>
    <link:label id="lab_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate_label_en-US" xlink:label="lab_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of interest expense, reconciliation of effective tax rate</link:label>
    <link:label id="lab_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of interest expense, reconciliation of effective tax rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate" xlink:to="lab_ptv_RateOfInterestExpenseReconciliationOfEffectiveTaxRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about intangible assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsAbstract" xlink:to="lab_ifrs-full_DisclosureOfIntangibleAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock_ac77903a-9796-460e-bab3-53f5f8b38629_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in financial liabilities - warrants</link:label>
    <link:label id="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities - Warrants [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities - Warrants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock" xlink:to="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted_fd6e297d-31b6-466a-ad9b-6f15da7ce200_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Grant date fair value</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average fair value at measurement date, share options granted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:to="lab_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TenantImprovementsRightOfUseAssets_a080b79d-8461-4da1-b233-83dc9e0f4e00_terseLabel_en-US" xlink:label="lab_ptv_TenantImprovementsRightOfUseAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tenant improvement - lease incentive</link:label>
    <link:label id="lab_ptv_TenantImprovementsRightOfUseAssets_label_en-US" xlink:label="lab_ptv_TenantImprovementsRightOfUseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tenant improvements, Right of use Assets</link:label>
    <link:label id="lab_ptv_TenantImprovementsRightOfUseAssets_documentation_en-US" xlink:label="lab_ptv_TenantImprovementsRightOfUseAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tenant improvements, Right of use Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TenantImprovementsRightOfUseAssets" xlink:href="ptv-20221231.xsd#ptv_TenantImprovementsRightOfUseAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TenantImprovementsRightOfUseAssets" xlink:to="lab_ptv_TenantImprovementsRightOfUseAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceLineItems_024258dc-2a55-4e4b-b9b9-8ae6d875d4fa_terseLabel_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference [Line Items]</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceLineItems_label_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference [Line Items]</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceLineItems_documentation_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_MinimumLiquidationPreferenceLineItems" xlink:href="ptv-20221231.xsd#ptv_MinimumLiquidationPreferenceLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_MinimumLiquidationPreferenceLineItems" xlink:to="lab_ptv_MinimumLiquidationPreferenceLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NonCashItemsAbstract_811774c7-2b2e-4e81-abf5-dead66b9096e_terseLabel_en-US" xlink:label="lab_ptv_NonCashItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cash items:</link:label>
    <link:label id="lab_ptv_NonCashItemsAbstract_label_en-US" xlink:label="lab_ptv_NonCashItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cash items [Abstract]</link:label>
    <link:label id="lab_ptv_NonCashItemsAbstract_documentation_en-US" xlink:label="lab_ptv_NonCashItemsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-cash items</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NonCashItemsAbstract" xlink:href="ptv-20221231.xsd#ptv_NonCashItemsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NonCashItemsAbstract" xlink:to="lab_ptv_NonCashItemsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock_172b8170-a340-4f27-8fab-830d9bcfc938_terseLabel_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity Instruments Issued by the Group</link:label>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock_label_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for equity instruments issued by the group [Policy Text Block]</link:label>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock_documentation_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for equity instruments issued by the group</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" xlink:href="ptv-20221231.xsd#ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" xlink:to="lab_ptv_DescriptionOfAccountingPolicyForEquityInstrumentsIssuedByTheGroupPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DerivativeFinancialAssets_c22b428a-002c-4f26-96ed-3ef2da3b3aaf_terseLabel_en-US" xlink:label="lab_ifrs-full_DerivativeFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative financial assets</link:label>
    <link:label id="lab_ifrs-full_DerivativeFinancialAssets_label_en-US" xlink:label="lab_ifrs-full_DerivativeFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DerivativeFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DerivativeFinancialAssets" xlink:to="lab_ifrs-full_DerivativeFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NumberOfTreasurySharesPurchased_718d48f6-e1d0-4cad-99f8-e80a0f5b66f8_negatedTerseLabel_en-US" xlink:label="lab_ptv_NumberOfTreasurySharesPurchased" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of Treasury stock (in shares)</link:label>
    <link:label id="lab_ptv_NumberOfTreasurySharesPurchased_e18e552d-a3a1-4970-9c36-9e29937e624f_terseLabel_en-US" xlink:label="lab_ptv_NumberOfTreasurySharesPurchased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of treasury stock (in shares)</link:label>
    <link:label id="lab_ptv_NumberOfTreasurySharesPurchased_label_en-US" xlink:label="lab_ptv_NumberOfTreasurySharesPurchased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Treasury Shares Purchased</link:label>
    <link:label id="lab_ptv_NumberOfTreasurySharesPurchased_documentation_en-US" xlink:label="lab_ptv_NumberOfTreasurySharesPurchased" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Treasury Shares Purchased</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NumberOfTreasurySharesPurchased" xlink:href="ptv-20221231.xsd#ptv_NumberOfTreasurySharesPurchased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NumberOfTreasurySharesPurchased" xlink:to="lab_ptv_NumberOfTreasurySharesPurchased" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PurchasesOfConvertibleNote_166f96f5-f4e3-4170-a42a-6f64f99f69f4_negatedLabel_en-US" xlink:label="lab_ptv_PurchasesOfConvertibleNote" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchases of Convertible Note</link:label>
    <link:label id="lab_ptv_PurchasesOfConvertibleNote_label_en-US" xlink:label="lab_ptv_PurchasesOfConvertibleNote" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchases of Convertible Note</link:label>
    <link:label id="lab_ptv_PurchasesOfConvertibleNote_documentation_en-US" xlink:label="lab_ptv_PurchasesOfConvertibleNote" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchases of Convertible Note</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PurchasesOfConvertibleNote" xlink:href="ptv-20221231.xsd#ptv_PurchasesOfConvertibleNote"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PurchasesOfConvertibleNote" xlink:to="lab_ptv_PurchasesOfConvertibleNote" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SeriesA2PreferredMember_6f06cfae-49a7-44a9-a6e4-681a056ec2d1_terseLabel_en-US" xlink:label="lab_ptv_SeriesA2PreferredMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series A-2 preferred</link:label>
    <link:label id="lab_ptv_SeriesA2PreferredMember_label_en-US" xlink:label="lab_ptv_SeriesA2PreferredMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series A-2 Preferred [Member]</link:label>
    <link:label id="lab_ptv_SeriesA2PreferredMember_documentation_en-US" xlink:label="lab_ptv_SeriesA2PreferredMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series A-2 Preferred [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SeriesA2PreferredMember" xlink:href="ptv-20221231.xsd#ptv_SeriesA2PreferredMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SeriesA2PreferredMember" xlink:to="lab_ptv_SeriesA2PreferredMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementCreditRiskAbstract_label_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementCreditRiskAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management Credit Risk [Abstract]</link:label>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementCreditRiskAbstract_documentation_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementCreditRiskAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CapitalAndFinancialRiskManagementCreditRiskAbstract" xlink:href="ptv-20221231.xsd#ptv_CapitalAndFinancialRiskManagementCreditRiskAbstract"/>
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    <link:label id="lab_ptv_RoyaltyPharmaMember_d0415096-2cf4-4d4a-b457-53590baf3f4d_terseLabel_en-US" xlink:label="lab_ptv_RoyaltyPharmaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Royalty Pharma</link:label>
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    <link:label id="lab_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement_a02c83e4-57b0-4261-810a-8afce3aca1db_negatedLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forfeited (in shares)</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_BorrowingsInterestPaid" xlink:href="ptv-20221231.xsd#ptv_BorrowingsInterestPaid"/>
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    <link:label id="lab_ptv_PotentialSecuritiesExcludedFromDilutedEPSCalculation_70680c47-e442-4c05-b808-50da7e0c7b87_terseLabel_en-US" xlink:label="lab_ptv_PotentialSecuritiesExcludedFromDilutedEPSCalculation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Potential securities excluded from diluted EPS calculation (in shares)</link:label>
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    <link:label id="lab_ptv_OwnershipPercentageOfAssociatesEquity_02092418-4cee-4238-a420-d0887987e2ae_terseLabel_en-US" xlink:label="lab_ptv_OwnershipPercentageOfAssociatesEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ownership percentage of associate's equity</link:label>
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    <link:label id="lab_ptv_OperatingExpenseCategoryDomain_a6cada7a-8fa0-4475-b5dc-b89e3b6a9c13_terseLabel_en-US" xlink:label="lab_ptv_OperatingExpenseCategoryDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Expense Category [Domain]</link:label>
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    <link:label id="lab_ptv_SubsidiaryOperatingCompaniesMember_documentation_en-US" xlink:label="lab_ptv_SubsidiaryOperatingCompaniesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Operating Companies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryOperatingCompaniesMember" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryOperatingCompaniesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryOperatingCompaniesMember" xlink:to="lab_ptv_SubsidiaryOperatingCompaniesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable_0e08c77e-012d-4a43-a476-abd07c1f30e2_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of significant unobservable inputs used in fair value measurement of assets [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of significant unobservable inputs used in fair value measurement of assets [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable" xlink:to="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CustomerAMember_7e33e6fa-8cdf-4fb1-8e8b-1d49540b2b14_terseLabel_en-US" xlink:label="lab_ptv_CustomerAMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer A</link:label>
    <link:label id="lab_ptv_CustomerAMember_label_en-US" xlink:label="lab_ptv_CustomerAMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer A [Member]</link:label>
    <link:label id="lab_ptv_CustomerAMember_documentation_en-US" xlink:label="lab_ptv_CustomerAMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer A</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CustomerAMember" xlink:href="ptv-20221231.xsd#ptv_CustomerAMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CustomerAMember" xlink:to="lab_ptv_CustomerAMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary_50ab368f-2a4b-4f1b-af5a-4789d15ecf4e_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition of subsidiary non-controlling interest</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through acquisition of subsidiary, equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDeferredTaxesExplanatory_23f18cf1-aa9b-4d86-ba4e-7f175aae0df6_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of deferred taxes</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDeferredTaxesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of deferred taxes [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDeferredTaxesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfDeferredTaxesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryConvertibleNotesMember_f948d67d-76dd-45f8-ae48-1239158bc7a9_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary convertible notes</link:label>
    <link:label id="lab_ptv_SubsidiaryConvertibleNotesMember_label_en-US" xlink:label="lab_ptv_SubsidiaryConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Convertible Notes [Member]</link:label>
    <link:label id="lab_ptv_SubsidiaryConvertibleNotesMember_documentation_en-US" xlink:label="lab_ptv_SubsidiaryConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Convertible Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryConvertibleNotesMember" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryConvertibleNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryConvertibleNotesMember" xlink:to="lab_ptv_SubsidiaryConvertibleNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RSULineItems_b1a2bcd9-c241-4120-a5e8-e06dba3c643b_terseLabel_en-US" xlink:label="lab_ptv_RSULineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RSU [Line Items]</link:label>
    <link:label id="lab_ptv_RSULineItems_label_en-US" xlink:label="lab_ptv_RSULineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RSU [Line Items]</link:label>
    <link:label id="lab_ptv_RSULineItems_documentation_en-US" xlink:label="lab_ptv_RSULineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">RSU</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RSULineItems" xlink:href="ptv-20221231.xsd#ptv_RSULineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RSULineItems" xlink:to="lab_ptv_RSULineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncurrentLeaseLiabilities_c9f0073c-ac60-458a-96a3-cb7f8cb76a52_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liability, non-current</link:label>
    <link:label id="lab_ifrs-full_NoncurrentLeaseLiabilities_cf823037-8ed0-4869-bde6-618bb9bae788_verboseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Portion of Lease Liability</link:label>
    <link:label id="lab_ifrs-full_NoncurrentLeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_NoncurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentLeaseLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NoncurrentLeaseLiabilities" xlink:to="lab_ifrs-full_NoncurrentLeaseLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_146b9b1e-49ef-4846-b018-da8208347133_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:to="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember_54d474c4-bc34-40b5-b79e-868f34be9591_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Three to Twelve months</link:label>
    <link:label id="lab_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than three months and not later than one year [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember" xlink:to="lab_ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EarningsCategoryDomain_77a8ad2e-da94-4f1b-9d4e-5b8e12f5a705_terseLabel_en-US" xlink:label="lab_ptv_EarningsCategoryDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Category [Domain]</link:label>
    <link:label id="lab_ptv_EarningsCategoryDomain_label_en-US" xlink:label="lab_ptv_EarningsCategoryDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Category [Domain]</link:label>
    <link:label id="lab_ptv_EarningsCategoryDomain_documentation_en-US" xlink:label="lab_ptv_EarningsCategoryDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Category [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EarningsCategoryDomain" xlink:href="ptv-20221231.xsd#ptv_EarningsCategoryDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EarningsCategoryDomain" xlink:to="lab_ptv_EarningsCategoryDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ScheduleOfEarningsPerShareTableTextBlock_43886154-f37f-4742-967b-2460f5cd4af2_terseLabel_en-US" xlink:label="lab_ptv_ScheduleOfEarningsPerShareTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of earnings/(loss) per share</link:label>
    <link:label id="lab_ptv_ScheduleOfEarningsPerShareTableTextBlock_label_en-US" xlink:label="lab_ptv_ScheduleOfEarningsPerShareTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Earnings per Share [Table Text Block]</link:label>
    <link:label id="lab_ptv_ScheduleOfEarningsPerShareTableTextBlock_documentation_en-US" xlink:label="lab_ptv_ScheduleOfEarningsPerShareTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Earnings per Share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ScheduleOfEarningsPerShareTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_ScheduleOfEarningsPerShareTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ScheduleOfEarningsPerShareTableTextBlock" xlink:to="lab_ptv_ScheduleOfEarningsPerShareTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties_4b57df4a-832f-4c19-ba26-29dacab1e952_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current receivables due from related parties</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current receivables due from related parties</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:to="lab_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock_078c2eee-bda1-44d3-a7c6-21fc071be090_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of lease liabilities</link:label>
    <link:label id="lab_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Lease Liabilities [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Lease Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfLeaseLiabilitiesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock" xlink:to="lab_ptv_DisclosureOfLeaseLiabilitiesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DrRajuKucherlapatiMember_6230f03d-c762-4cff-9a6f-4749c72e06a3_terseLabel_en-US" xlink:label="lab_ptv_DrRajuKucherlapatiMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Raju Kucherlapati</link:label>
    <link:label id="lab_ptv_DrRajuKucherlapatiMember_label_en-US" xlink:label="lab_ptv_DrRajuKucherlapatiMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Raju Kucherlapati [Member]</link:label>
    <link:label id="lab_ptv_DrRajuKucherlapatiMember_documentation_en-US" xlink:label="lab_ptv_DrRajuKucherlapatiMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Raju Kucherlapati</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DrRajuKucherlapatiMember" xlink:href="ptv-20221231.xsd#ptv_DrRajuKucherlapatiMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DrRajuKucherlapatiMember" xlink:to="lab_ptv_DrRajuKucherlapatiMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityRegistrantName_93cd75c0-a34f-40dc-a65a-ef9c62fd6422_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_label_en-US" xlink:label="lab_dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityRegistrantName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_Deconsolidation_738fffd4-fd2a-407a-9e56-28a1017c8c48_negatedTerseLabel_en-US" xlink:label="lab_ptv_Deconsolidation" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation</link:label>
    <link:label id="lab_ptv_Deconsolidation_43d0ee8f-9fff-424c-992e-132bb05111d4_terseLabel_en-US" xlink:label="lab_ptv_Deconsolidation" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation</link:label>
    <link:label id="lab_ptv_Deconsolidation_label_en-US" xlink:label="lab_ptv_Deconsolidation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation</link:label>
    <link:label id="lab_ptv_Deconsolidation_documentation_en-US" xlink:label="lab_ptv_Deconsolidation" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_Deconsolidation" xlink:href="ptv-20221231.xsd#ptv_Deconsolidation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_Deconsolidation" xlink:to="lab_ptv_Deconsolidation" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_KarunaAndVorMember_304b369b-b330-4961-a781-6e189cae4230_terseLabel_en-US" xlink:label="lab_ptv_KarunaAndVorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna and Vor</link:label>
    <link:label id="lab_ptv_KarunaAndVorMember_label_en-US" xlink:label="lab_ptv_KarunaAndVorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna And Vor [Member]</link:label>
    <link:label id="lab_ptv_KarunaAndVorMember_documentation_en-US" xlink:label="lab_ptv_KarunaAndVorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna And Vor</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_KarunaAndVorMember" xlink:href="ptv-20221231.xsd#ptv_KarunaAndVorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_KarunaAndVorMember" xlink:to="lab_ptv_KarunaAndVorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_5944cc53-a66a-42f1-b3c1-231f5cb81a20_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of disaggregation of revenue from contracts with customers [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of disaggregation of revenue from contracts with customers [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:to="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RateOfEffectsOfStateTaxRateInUS_26bd1799-7f19-4faf-afde-aaf595b4ab91_terseLabel_en-US" xlink:label="lab_ptv_RateOfEffectsOfStateTaxRateInUS" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effects of state tax rate in U.S.</link:label>
    <link:label id="lab_ptv_RateOfEffectsOfStateTaxRateInUS_label_en-US" xlink:label="lab_ptv_RateOfEffectsOfStateTaxRateInUS" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of Effects of state tax rate in US</link:label>
    <link:label id="lab_ptv_RateOfEffectsOfStateTaxRateInUS_documentation_en-US" xlink:label="lab_ptv_RateOfEffectsOfStateTaxRateInUS" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of Effects of state tax rate in US</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RateOfEffectsOfStateTaxRateInUS" xlink:href="ptv-20221231.xsd#ptv_RateOfEffectsOfStateTaxRateInUS"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RateOfEffectsOfStateTaxRateInUS" xlink:to="lab_ptv_RateOfEffectsOfStateTaxRateInUS" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_UnrecognizedDeferredTaxAssetsTable_7aa6b155-d936-443f-8b89-2217b84da1a1_terseLabel_en-US" xlink:label="lab_ptv_UnrecognizedDeferredTaxAssetsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized deferred tax assets [Table]</link:label>
    <link:label id="lab_ptv_UnrecognizedDeferredTaxAssetsTable_label_en-US" xlink:label="lab_ptv_UnrecognizedDeferredTaxAssetsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized deferred tax assets [Table]</link:label>
    <link:label id="lab_ptv_UnrecognizedDeferredTaxAssetsTable_documentation_en-US" xlink:label="lab_ptv_UnrecognizedDeferredTaxAssetsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized deferred tax assets [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_UnrecognizedDeferredTaxAssetsTable" xlink:href="ptv-20221231.xsd#ptv_UnrecognizedDeferredTaxAssetsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_UnrecognizedDeferredTaxAssetsTable" xlink:to="lab_ptv_UnrecognizedDeferredTaxAssetsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsequentEventsAbstract_label_en-US" xlink:label="lab_ptv_SubsequentEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
    <link:label id="lab_ptv_SubsequentEventsAbstract_documentation_en-US" xlink:label="lab_ptv_SubsequentEventsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsequentEventsAbstract" xlink:href="ptv-20221231.xsd#ptv_SubsequentEventsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsequentEventsAbstract" xlink:to="lab_ptv_SubsequentEventsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DeconsolidatedFormerSubsidiariesAbstract_e1ec0ab3-86b9-4972-88c5-2de97e22542e_terseLabel_en-US" xlink:label="lab_ptv_DeconsolidatedFormerSubsidiariesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidated former subsidiary operating&#160;companies</link:label>
    <link:label id="lab_ptv_DeconsolidatedFormerSubsidiariesAbstract_label_en-US" xlink:label="lab_ptv_DeconsolidatedFormerSubsidiariesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidated former subsidiaries [Abstract]</link:label>
    <link:label id="lab_ptv_DeconsolidatedFormerSubsidiariesAbstract_documentation_en-US" xlink:label="lab_ptv_DeconsolidatedFormerSubsidiariesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidated former subsidiaries</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DeconsolidatedFormerSubsidiariesAbstract" xlink:href="ptv-20221231.xsd#ptv_DeconsolidatedFormerSubsidiariesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DeconsolidatedFormerSubsidiariesAbstract" xlink:to="lab_ptv_DeconsolidatedFormerSubsidiariesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_IssuanceOfConvertibleNoteReceivableMember_5d29c9b0-44f1-4523-99c3-e7f19c41346c_terseLabel_en-US" xlink:label="lab_ptv_IssuanceOfConvertibleNoteReceivableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of convertible note receivable</link:label>
    <link:label id="lab_ptv_IssuanceOfConvertibleNoteReceivableMember_label_en-US" xlink:label="lab_ptv_IssuanceOfConvertibleNoteReceivableMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance Of Convertible Note Receivable [Member]</link:label>
    <link:label id="lab_ptv_IssuanceOfConvertibleNoteReceivableMember_documentation_en-US" xlink:label="lab_ptv_IssuanceOfConvertibleNoteReceivableMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance Of Convertible Note Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_IssuanceOfConvertibleNoteReceivableMember" xlink:href="ptv-20221231.xsd#ptv_IssuanceOfConvertibleNoteReceivableMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_IssuanceOfConvertibleNoteReceivableMember" xlink:to="lab_ptv_IssuanceOfConvertibleNoteReceivableMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareOfNetAssets_b743ab45-b232-40dd-b4a4-444569faca9d_terseLabel_en-US" xlink:label="lab_ptv_ShareOfNetAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Group's share of net assets (net deficit)</link:label>
    <link:label id="lab_ptv_ShareOfNetAssets_label_en-US" xlink:label="lab_ptv_ShareOfNetAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of net assets</link:label>
    <link:label id="lab_ptv_ShareOfNetAssets_documentation_en-US" xlink:label="lab_ptv_ShareOfNetAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of net assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareOfNetAssets" xlink:href="ptv-20221231.xsd#ptv_ShareOfNetAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareOfNetAssets" xlink:to="lab_ptv_ShareOfNetAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PureTechHealthCompanyMember_99b7acd7-7e42-43b2-97b5-90927e2184da_terseLabel_en-US" xlink:label="lab_ptv_PureTechHealthCompanyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Health (Company)</link:label>
    <link:label id="lab_ptv_PureTechHealthCompanyMember_label_en-US" xlink:label="lab_ptv_PureTechHealthCompanyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Health (Company) [Member]</link:label>
    <link:label id="lab_ptv_PureTechHealthCompanyMember_documentation_en-US" xlink:label="lab_ptv_PureTechHealthCompanyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Health (Company)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PureTechHealthCompanyMember" xlink:href="ptv-20221231.xsd#ptv_PureTechHealthCompanyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PureTechHealthCompanyMember" xlink:to="lab_ptv_PureTechHealthCompanyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MinimumMember_fef646fb-721b-41a7-937b-cbdf5891f147_terseLabel_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum</link:label>
    <link:label id="lab_srt_MinimumMember_label_en-US" xlink:label="lab_srt_MinimumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember" xlink:to="lab_srt_MinimumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_dfc6def1-036b-47c4-acc9-dd8aae2dd659_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany" xlink:to="lab_dei_EntityEmergingGrowthCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_InactiveSubsidiariesAbstract_437c7950-0d73-46ef-909b-825c188fccf1_terseLabel_en-US" xlink:label="lab_ptv_InactiveSubsidiariesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inactive subsidiaries</link:label>
    <link:label id="lab_ptv_InactiveSubsidiariesAbstract_label_en-US" xlink:label="lab_ptv_InactiveSubsidiariesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inactive subsidiaries [Abstract]</link:label>
    <link:label id="lab_ptv_InactiveSubsidiariesAbstract_documentation_en-US" xlink:label="lab_ptv_InactiveSubsidiariesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Inactive subsidiaries</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_InactiveSubsidiariesAbstract" xlink:href="ptv-20221231.xsd#ptv_InactiveSubsidiariesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_InactiveSubsidiariesAbstract" xlink:to="lab_ptv_InactiveSubsidiariesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AcquiredMinorityNonControllingInterest_65df8148-abdc-416a-97a4-b3e81b513f18_terseLabel_en-US" xlink:label="lab_ptv_AcquiredMinorityNonControllingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquired minority non-controlling interest</link:label>
    <link:label id="lab_ptv_AcquiredMinorityNonControllingInterest_label_en-US" xlink:label="lab_ptv_AcquiredMinorityNonControllingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquired minority non-controlling interest</link:label>
    <link:label id="lab_ptv_AcquiredMinorityNonControllingInterest_documentation_en-US" xlink:label="lab_ptv_AcquiredMinorityNonControllingInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquired minority non-controlling interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AcquiredMinorityNonControllingInterest" xlink:href="ptv-20221231.xsd#ptv_AcquiredMinorityNonControllingInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AcquiredMinorityNonControllingInterest" xlink:to="lab_ptv_AcquiredMinorityNonControllingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_2f66ebe6-88cd-4f7a-9fe7-6e79160e7282_terseLabel_en-US" xlink:label="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment, Name [Axis]</link:label>
    <link:label id="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_label_en-US" xlink:label="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment, Name [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_TradingSymbol_3ba4ad75-55d9-4553-8678-d68e25e1a5fe_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading Symbol</link:label>
    <link:label id="lab_dei_TradingSymbol_label_en-US" xlink:label="lab_dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trading Symbol</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_TradingSymbol"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityFileNumber_d7dbe127-6871-458b-b8d3-ad003efe6209_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_label_en-US" xlink:label="lab_dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFileNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber" xlink:to="lab_dei_EntityFileNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DecreaseThroughLossOfControlOfSubsidiaryNetAssets_97e31408-133f-4e00-b0ac-994b94b53017_negatedTerseLabel_en-US" xlink:label="lab_ptv_DecreaseThroughLossOfControlOfSubsidiaryNetAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease through loss of control of subsidiary, net assets</link:label>
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    <link:label id="lab_ptv_DecreaseThroughLossOfControlOfSubsidiaryNetAssets_documentation_en-US" xlink:label="lab_ptv_DecreaseThroughLossOfControlOfSubsidiaryNetAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease Through Loss Of Control Of Subsidiary, Net Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DecreaseThroughLossOfControlOfSubsidiaryNetAssets" xlink:href="ptv-20221231.xsd#ptv_DecreaseThroughLossOfControlOfSubsidiaryNetAssets"/>
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    <link:label id="lab_ptv_ImbriumTherapeuticsLPMember_669966b7-3ad6-4bdd-9299-2302394f0c59_terseLabel_en-US" xlink:label="lab_ptv_ImbriumTherapeuticsLPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Imbrium Therapeutics L.P.</link:label>
    <link:label id="lab_ptv_ImbriumTherapeuticsLPMember_label_en-US" xlink:label="lab_ptv_ImbriumTherapeuticsLPMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Imbrium Therapeutics L.P. [Member]</link:label>
    <link:label id="lab_ptv_ImbriumTherapeuticsLPMember_documentation_en-US" xlink:label="lab_ptv_ImbriumTherapeuticsLPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Imbrium Therapeutics L.P.</link:label>
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    <link:label id="lab_ifrs-full_FloatingInterestRateMember_a2663725-f839-40f3-930e-127e501444fa_terseLabel_en-US" xlink:label="lab_ifrs-full_FloatingInterestRateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Floating interest rate</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FloatingInterestRateMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FloatingInterestRateMember"/>
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    <link:label id="lab_ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember_9d26dcd4-e028-4423-bc62-0ea3fb6d86e5_terseLabel_en-US" xlink:label="lab_ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Volatility</link:label>
    <link:label id="lab_ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember_label_en-US" xlink:label="lab_ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Historical volatility for shares, measurement input [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" xlink:to="lab_ifrs-full_HistoricalVolatilityForSharesMeasurementInputMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsTable_2a738447-70b2-4ec9-9069-06d8f116eaae_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [table]</link:label>
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    <link:label id="lab_ifrs-full_OtherGainsLosses_6449bc9c-8978-4c6e-bbd5-e69bb2b2aea2_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherGainsLosses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other income/(expense)</link:label>
    <link:label id="lab_ifrs-full_OtherGainsLosses_ff5a7241-5e27-4b71-a0e2-28ded6d6d2fe_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherGainsLosses" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other income/(expense)</link:label>
    <link:label id="lab_ifrs-full_OtherGainsLosses_label_en-US" xlink:label="lab_ifrs-full_OtherGainsLosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other gains (losses)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherGainsLosses" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherGainsLosses"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherGainsLosses" xlink:to="lab_ifrs-full_OtherGainsLosses" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NumberOfOptionsHeld_31a1ada1-0f23-4a3d-8f75-1532c1c5a27f_terseLabel_en-US" xlink:label="lab_ptv_NumberOfOptionsHeld" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of options held (in shares)</link:label>
    <link:label id="lab_ptv_NumberOfOptionsHeld_label_en-US" xlink:label="lab_ptv_NumberOfOptionsHeld" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Options held</link:label>
    <link:label id="lab_ptv_NumberOfOptionsHeld_documentation_en-US" xlink:label="lab_ptv_NumberOfOptionsHeld" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Options held</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NumberOfOptionsHeld" xlink:href="ptv-20221231.xsd#ptv_NumberOfOptionsHeld"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NumberOfOptionsHeld" xlink:to="lab_ptv_NumberOfOptionsHeld" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesAbstract_f6f79f35-4d13-4e44-8abb-74b8012c5d62_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Abstract]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesAbstract_label_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Abstract]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesAbstract_documentation_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryPreferredSharesAbstract" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryPreferredSharesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryPreferredSharesAbstract" xlink:to="lab_ptv_SubsidiaryPreferredSharesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareBasedPaymentsTableLineItems_cf3559f2-03b3-4996-9b58-e9cb77fd2c4b_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentsTableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payments Table [Line Items]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentsTableLineItems_label_en-US" xlink:label="lab_ptv_ShareBasedPaymentsTableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payments Table [Line Items]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentsTableLineItems_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentsTableLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payments Table</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentsTableLineItems" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentsTableLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedPaymentsTableLineItems" xlink:to="lab_ptv_ShareBasedPaymentsTableLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DirectorsRemunerationExpense_44c32c33-9ac8-4158-ad5d-bb080855d3d7_terseLabel_en-US" xlink:label="lab_ifrs-full_DirectorsRemunerationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Remuneration expense</link:label>
    <link:label id="lab_ifrs-full_DirectorsRemunerationExpense_label_en-US" xlink:label="lab_ifrs-full_DirectorsRemunerationExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors' remuneration expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DirectorsRemunerationExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DirectorsRemunerationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DirectorsRemunerationExpense" xlink:to="lab_ifrs-full_DirectorsRemunerationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets_2eeaa1c5-70e5-4f88-af90-f1f88c44dec1_verboseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrealized gain (loss) &#8211; change in fair value through profit and loss</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets_e7839f15-14af-4aec-9a32-a57d6d598c27_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loss &#8211; change in fair value through profit and loss</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in fair value measurement, assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:to="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesMember_da141d71-f050-430a-834f-a59dff731a69_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary preferred shares</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesMember_label_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Member]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesMember_documentation_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryPreferredSharesMember" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryPreferredSharesMember"/>
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    <link:label id="lab_ifrs-full_UnusedTaxLossesMember_6b87a50e-3150-4525-a5d4-334b41223cb2_terseLabel_en-US" xlink:label="lab_ifrs-full_UnusedTaxLossesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating tax losses</link:label>
    <link:label id="lab_ifrs-full_UnusedTaxLossesMember_label_en-US" xlink:label="lab_ifrs-full_UnusedTaxLossesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unused tax losses [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnusedTaxLossesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_UnusedTaxLossesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_UnusedTaxLossesMember" xlink:to="lab_ifrs-full_UnusedTaxLossesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfFinancialAssetsAxis_8fa20cf6-3469-40ef-b83c-38f1f85233a7_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of financial assets [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfFinancialAssetsAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfFinancialAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of financial assets [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfFinancialAssetsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TypesOfFinancialAssetsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfFinancialAssetsAxis" xlink:to="lab_ifrs-full_TypesOfFinancialAssetsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock_c3df7f36-a982-4c75-94f7-aea7a4c9d4da_terseLabel_en-US" xlink:label="lab_ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of investments held at fair value</link:label>
    <link:label id="lab_ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock_label_en-US" xlink:label="lab_ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary Of investments held at fair value [Table Text Block]</link:label>
    <link:label id="lab_ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock_documentation_en-US" xlink:label="lab_ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary Of investments held at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_SummaryOfInvestmentsHeldAtFairValueTableTextBlock"/>
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    <link:label id="lab_ifrs-full_NoncurrentLiabilities_9debb172-53ca-4e4f-b8a1-65203aa3ef79_totalLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total non-current liabilities</link:label>
    <link:label id="lab_ifrs-full_NoncurrentLiabilities_f6d0ade4-a1f0-4442-b393-a31e65e425ac_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current liabilities</link:label>
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    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentMember_4179c30d-2c8e-4ee4-9008-5da63e5934ee_terseLabel_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fixed assets</link:label>
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    <link:label id="lab_ptv_DilutiveEffectOfPurchaseOfTreasurySharesOnNumberOfOrdinaryShares_d5eab53f-fbb7-4029-a93c-cb21eff6af92_negatedLabel_en-US" xlink:label="lab_ptv_DilutiveEffectOfPurchaseOfTreasurySharesOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of treasury shares purchased (in shares)</link:label>
    <link:label id="lab_ptv_DilutiveEffectOfPurchaseOfTreasurySharesOnNumberOfOrdinaryShares_label_en-US" xlink:label="lab_ptv_DilutiveEffectOfPurchaseOfTreasurySharesOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dilutive effect of purchase of treasury shares on number of ordinary shares</link:label>
    <link:label id="lab_ptv_DilutiveEffectOfPurchaseOfTreasurySharesOnNumberOfOrdinaryShares_documentation_en-US" xlink:label="lab_ptv_DilutiveEffectOfPurchaseOfTreasurySharesOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dilutive effect of purchase of treasury shares on number of ordinary shares</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsAbstract_6ae4b2b2-d4a4-426b-b597-abf3205c31a6_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of significant unobservable inputs used in fair value measurement of assets [abstract]</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments_7f2860fd-72c7-49b9-96ff-96443dce37f4_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughConversionOfConvertibleInstruments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through conversion of convertible instruments, equity</link:label>
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    <link:label id="lab_ptv_WeightedAverageOptionsForfeitedLineItems_f5c1eaf9-6033-4464-b73e-2329156a4f51_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsForfeitedLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options forfeited [Line Items]</link:label>
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    <link:label id="lab_ptv_WeightedAverageOptionsForfeitedLineItems_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsForfeitedLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options forfeited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsForfeitedLineItems" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsForfeitedLineItems"/>
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    <link:label id="lab_ptv_LighthouseCapitalPartnersVILPMember_222766b5-0a3a-4a85-bc3a-d9ebf45bef51_terseLabel_en-US" xlink:label="lab_ptv_LighthouseCapitalPartnersVILPMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lighthouse Capital Partners VI, L.P</link:label>
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    <link:label id="lab_ptv_LighthouseCapitalPartnersVILPMember_documentation_en-US" xlink:label="lab_ptv_LighthouseCapitalPartnersVILPMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lighthouse Capital Partners VI, L.P</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfRevenueExplanatory_4e075998-08ed-44d4-a80c-e522473dd076_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRevenueExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRevenueExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRevenueExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of revenue [text block]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract_e183aee8-3428-4b71-818e-73020fabfcdf_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [abstract]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract"/>
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    <link:label id="lab_ptv_ConversionOfConvertibleNotes_7ee1805f-d78d-408c-9ce6-df2bb495d309_terseLabel_en-US" xlink:label="lab_ptv_ConversionOfConvertibleNotes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion of convertible notes into preferred shares - non cash financing activity</link:label>
    <link:label id="lab_ptv_ConversionOfConvertibleNotes_label_en-US" xlink:label="lab_ptv_ConversionOfConvertibleNotes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion of convertible notes</link:label>
    <link:label id="lab_ptv_ConversionOfConvertibleNotes_documentation_en-US" xlink:label="lab_ptv_ConversionOfConvertibleNotes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion of convertible notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConversionOfConvertibleNotes" xlink:href="ptv-20221231.xsd#ptv_ConversionOfConvertibleNotes"/>
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    <link:label id="lab_ptv_DisclosureOfSubsidiaryPreferredSharesTextBlock_13ab9d62-35b9-4577-89aa-afa5e896055d_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfSubsidiaryPreferredSharesTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfSubsidiaryPreferredSharesTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfSubsidiaryPreferredSharesTextBlock"/>
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    <link:label id="lab_ptv_NonControllingInterestsAbstract_63e520c9-265a-4104-ab18-e58a45606a8b_terseLabel_en-US" xlink:label="lab_ptv_NonControllingInterestsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests [Abstract]</link:label>
    <link:label id="lab_ptv_NonControllingInterestsAbstract_label_en-US" xlink:label="lab_ptv_NonControllingInterestsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests [Abstract]</link:label>
    <link:label id="lab_ptv_NonControllingInterestsAbstract_documentation_en-US" xlink:label="lab_ptv_NonControllingInterestsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NonControllingInterestsAbstract" xlink:href="ptv-20221231.xsd#ptv_NonControllingInterestsAbstract"/>
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    <link:label id="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_787ce818-4276-45d2-bffb-a21f78fd9285_verboseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Granted (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_label_en-US" xlink:label="lab_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of other equity instruments granted in share-based payment arrangement</link:label>
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    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_3d9047f7-973f-441f-9c4a-cd434d8a1394_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contract revenue</link:label>
    <link:label id="lab_ifrs-full_RevenueFromContractsWithCustomers_label_en-US" xlink:label="lab_ifrs-full_RevenueFromContractsWithCustomers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue from contracts with customers</link:label>
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    <link:label id="lab_ifrs-full_DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment_72f498dc-f8cf-4cb3-a363-a498b61a8dd4_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DecreaseThroughLossOfControlOfSubsidiaryPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation of subsidiaries</link:label>
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    <link:label id="lab_ptv_ShareBasedPaymentSettlementCashReceivedByEmployeeAfterTaxWithheldOnEmployeesBehalf_dea8d331-6e04-46da-8554-dfccecc1f793_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentSettlementCashReceivedByEmployeeAfterTaxWithheldOnEmployeesBehalf" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment arrangement after tax deduction, cash used to settle award</link:label>
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    <link:label id="lab_ptv_ShareBasedPaymentSettlementCashReceivedByEmployeeAfterTaxWithheldOnEmployeesBehalf_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentSettlementCashReceivedByEmployeeAfterTaxWithheldOnEmployeesBehalf" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Settlement, cash received by employee after tax withheld on employee's behalf</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentSettlementCashReceivedByEmployeeAfterTaxWithheldOnEmployeesBehalf" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentSettlementCashReceivedByEmployeeAfterTaxWithheldOnEmployeesBehalf"/>
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    <link:label id="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_f5a783a4-b83b-4bf2-823a-3283517a8aba_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for segment consolidation items</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for segment consolidation items [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:to="lab_ifrs-full_EntitysTotalForSegmentConsolidationItemsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DrRobertLangerMember_1c564c24-b2c3-4c18-93f2-1ed6cd3eb88a_terseLabel_en-US" xlink:label="lab_ptv_DrRobertLangerMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Robert Langer</link:label>
    <link:label id="lab_ptv_DrRobertLangerMember_label_en-US" xlink:label="lab_ptv_DrRobertLangerMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Robert Langer [Member]</link:label>
    <link:label id="lab_ptv_DrRobertLangerMember_documentation_en-US" xlink:label="lab_ptv_DrRobertLangerMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Robert Langer</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DrRobertLangerMember" xlink:to="lab_ptv_DrRobertLangerMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromExerciseOfOptions_66fba762-0a01-4667-b05d-a38fbc94ac4c_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise of stock options</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromExerciseOfOptions_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from exercise of options</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromExerciseOfOptions" xlink:to="lab_ifrs-full_ProceedsFromExerciseOfOptions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_bbcf1a64-e122-4236-8f32-8622301b3a75_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment [Table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about property, plant and equipment [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:to="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesTable_9146e143-660c-4372-bf15-e5e0b7ecbb74_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Table]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesTable_label_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Table]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesTable_documentation_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryPreferredSharesTable" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryPreferredSharesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryPreferredSharesTable" xlink:to="lab_ptv_SubsidiaryPreferredSharesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_JefferiesInternationalLimitedMember_c1cbe5d6-6df5-4919-b36f-a754c343e8b1_terseLabel_en-US" xlink:label="lab_ptv_JefferiesInternationalLimitedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Jefferies International Limited</link:label>
    <link:label id="lab_ptv_JefferiesInternationalLimitedMember_label_en-US" xlink:label="lab_ptv_JefferiesInternationalLimitedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Jefferies International Limited [Member]</link:label>
    <link:label id="lab_ptv_JefferiesInternationalLimitedMember_documentation_en-US" xlink:label="lab_ptv_JefferiesInternationalLimitedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Jefferies International Limited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_JefferiesInternationalLimitedMember" xlink:href="ptv-20221231.xsd#ptv_JefferiesInternationalLimitedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_JefferiesInternationalLimitedMember" xlink:to="lab_ptv_JefferiesInternationalLimitedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EquityAcquiredShareCapitalPureTechLLCTable_e4278a62-231b-4d30-baab-4a2b1a6a17e5_terseLabel_en-US" xlink:label="lab_ptv_EquityAcquiredShareCapitalPureTechLLCTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity - Acquired Share capital PureTech LLC [Table]</link:label>
    <link:label id="lab_ptv_EquityAcquiredShareCapitalPureTechLLCTable_label_en-US" xlink:label="lab_ptv_EquityAcquiredShareCapitalPureTechLLCTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity - Acquired Share capital PureTech LLC [Table]</link:label>
    <link:label id="lab_ptv_EquityAcquiredShareCapitalPureTechLLCTable_documentation_en-US" xlink:label="lab_ptv_EquityAcquiredShareCapitalPureTechLLCTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity - Acquired Share capital PureTech LLC [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EquityAcquiredShareCapitalPureTechLLCTable" xlink:href="ptv-20221231.xsd#ptv_EquityAcquiredShareCapitalPureTechLLCTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EquityAcquiredShareCapitalPureTechLLCTable" xlink:to="lab_ptv_EquityAcquiredShareCapitalPureTechLLCTable" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_5e3d54c9-5e13-4052-a318-f256e7768507_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_label_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent" xlink:to="lab_dei_EntityInteractiveDataCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeasesRentalLineItems_71ae1707-c265-46e2-874f-0cb1670a07c9_terseLabel_en-US" xlink:label="lab_ptv_LeasesRentalLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases - Rental [Line Items]</link:label>
    <link:label id="lab_ptv_LeasesRentalLineItems_label_en-US" xlink:label="lab_ptv_LeasesRentalLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases - Rental [Line Items]</link:label>
    <link:label id="lab_ptv_LeasesRentalLineItems_documentation_en-US" xlink:label="lab_ptv_LeasesRentalLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases - Rental [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeasesRentalLineItems" xlink:href="ptv-20221231.xsd#ptv_LeasesRentalLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeasesRentalLineItems" xlink:to="lab_ptv_LeasesRentalLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory_00ff000b-77c1-4cc9-bf43-3110bd2d59c0_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Parties Transactions</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of transactions between related parties [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_49526d7c-acba-426d-883c-36e0ac4e29e1_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for depreciation and amortisation expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:to="lab_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageOptionsOutstandingAbstract_ca535232-d2ce-4a54-9b4a-818a48cee560_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsOutstandingAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options Outstanding [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsOutstandingAbstract_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsOutstandingAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options Outstanding [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsOutstandingAbstract_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsOutstandingAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options Outstanding</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsOutstandingAbstract" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsOutstandingAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageOptionsOutstandingAbstract" xlink:to="lab_ptv_WeightedAverageOptionsOutstandingAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EmployeeBenefitsExpense_48b3c90e-86dd-4221-b9eb-bd134ac870f3_terseLabel_en-US" xlink:label="lab_ifrs-full_EmployeeBenefitsExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Healthcare benefits</link:label>
    <link:label id="lab_ifrs-full_EmployeeBenefitsExpense_label_en-US" xlink:label="lab_ifrs-full_EmployeeBenefitsExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee benefits expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EmployeeBenefitsExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EmployeeBenefitsExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EmployeeBenefitsExpense" xlink:to="lab_ifrs-full_EmployeeBenefitsExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeaseContractualTermDomain_62a67cac-4836-4d8e-9ea5-1b0d361fb555_terseLabel_en-US" xlink:label="lab_ptv_LeaseContractualTermDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Contractual Term [Domain]</link:label>
    <link:label id="lab_ptv_LeaseContractualTermDomain_label_en-US" xlink:label="lab_ptv_LeaseContractualTermDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Contractual Term [Domain]</link:label>
    <link:label id="lab_ptv_LeaseContractualTermDomain_documentation_en-US" xlink:label="lab_ptv_LeaseContractualTermDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Contractual Term [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeaseContractualTermDomain" xlink:href="ptv-20221231.xsd#ptv_LeaseContractualTermDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeaseContractualTermDomain" xlink:to="lab_ptv_LeaseContractualTermDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests_b7fe4c4b-9222-4f12-965c-28fcde922b9c_terseLabel_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of ownership interests held by non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests_label_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of ownership interests held by non-controlling interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests"/>
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    <link:label id="lab_ptv_OtherSellingGeneralAndAdministrativeExpense_1623efe0-b946-49bb-93e0-1bc08172c032_terseLabel_en-US" xlink:label="lab_ptv_OtherSellingGeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other general and administrative expenses</link:label>
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    <link:label id="lab_ptv_InvestorMember_8feb2edc-d36d-429e-a812-6708ef53cb5b_terseLabel_en-US" xlink:label="lab_ptv_InvestorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investor</link:label>
    <link:label id="lab_ptv_InvestorMember_label_en-US" xlink:label="lab_ptv_InvestorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investor [Member]</link:label>
    <link:label id="lab_ptv_InvestorMember_documentation_en-US" xlink:label="lab_ptv_InvestorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investor</link:label>
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    <link:label id="lab_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_f11acf57-15b9-4017-aca6-3f4ca063b763_terseLabel_en-US" xlink:label="lab_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability for share based awards</link:label>
    <link:label id="lab_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_label_en-US" xlink:label="lab_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities from share-based payment transactions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011"/>
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    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables_3c5af142-2dd3-4866-9284-4a4a7fa02752_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for decrease (increase) in trade and other receivables</link:label>
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    <link:label id="lab_ptv_PerformanceSharePlanAbstract_fb077cc8-d11b-44d1-9376-7ceab1fc8649_terseLabel_en-US" xlink:label="lab_ptv_PerformanceSharePlanAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Plan [Abstract]</link:label>
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    <link:label id="lab_ptv_PerformanceSharePlanAbstract_documentation_en-US" xlink:label="lab_ptv_PerformanceSharePlanAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PerformanceSharePlanAbstract" xlink:href="ptv-20221231.xsd#ptv_PerformanceSharePlanAbstract"/>
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    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_c3ccdee4-82c6-4ddb-8f74-3e159d87e305_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Owners of the Company</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income, attributable to owners of parent</link:label>
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    <link:label id="lab_dei_BusinessContactMember_6deddbdd-f573-403c-be92-4334861e6552_terseLabel_en-US" xlink:label="lab_dei_BusinessContactMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Contact</link:label>
    <link:label id="lab_dei_BusinessContactMember_label_en-US" xlink:label="lab_dei_BusinessContactMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Contact [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_BusinessContactMember" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_BusinessContactMember"/>
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    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtFairValue_b8e06c91-d5b6-46b9-bcb8-792339ad0269_periodStartLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of period</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtFairValue_63176a33-432f-40f7-ab4b-6e988d0e4f48_periodEndLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at end of period</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtFairValue_6866ea4a-139b-47d3-a8b5-333d10789474_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities, at fair value</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtFairValue_fffd7878-2521-4983-b77b-1892b699aa95_verboseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesAtFairValue_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities, at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinancialLiabilitiesAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:to="lab_ifrs-full_FinancialLiabilitiesAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsTable_4ee8e834-343b-4e55-8d00-022534192967_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable" xlink:to="lab_ifrs-full_DisclosureOfFinancialAssetsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TaxRateEffectOfAdjustmentsRelatedToChangeInBlendStateRate_7ee8a91c-9909-4fd3-baf9-4048c50a703b_terseLabel_en-US" xlink:label="lab_ptv_TaxRateEffectOfAdjustmentsRelatedToChangeInBlendStateRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in blended state rate impact due to state apportionment change</link:label>
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    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_aab33d73-63af-41be-81b7-ea70cab751af_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment expense</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_3049a4a4-5de0-4873-8bb6-fb5b414838e4_terseLabel_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment expense</link:label>
    <link:label id="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_label_en-US" xlink:label="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense from share-based payment transactions with employees</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:to="lab_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember_3443167e-37ae-48f1-b2a7-a353c981023e_terseLabel_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [member]</link:label>
    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember_label_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TimingOfTransferOfGoodsOrServicesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:to="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued_0049c290-986e-4a17-baa6-4817b3c15f1a_verboseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise of share-based awards (in shares)</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued_ee3e9cf7-8735-4250-8df2-da613ba1a2a6_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of shares issued (in shares)</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in number of ordinary shares issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued" xlink:to="lab_ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_ddeaa55d-5f7a-4980-a8ba-28a707f87587_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Four to five years</link:label>
    <link:label id="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than four years and not later than five years [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:to="lab_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems_c5015e7e-3f87-48b2-8a60-8a53cbd8fe94_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [line items]</link:label>
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    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities_1620f60e-ccdd-4f87-ad91-8ecdbe533c6d_negatedLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income taxes paid</link:label>
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    <link:label id="lab_ptv_OutsideInvestorsMember_4deebfe7-7e7c-45ce-8a60-e4361fb551df_terseLabel_en-US" xlink:label="lab_ptv_OutsideInvestorsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outside investors</link:label>
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    <link:label id="lab_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries_7521a53c-09e6-47c8-97f4-0ecf86824982_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition of a non-controlling Interest of a subsidiary</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory_9582b07a-8a4c-4e93-acf0-bf5ed7387ddc_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation</link:label>
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    <link:label id="lab_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_742db22f-4df3-46f1-8f4e-389313bd9665_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Three to four years</link:label>
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    <link:label id="lab_ptv_ResTORbioMember_4ef8899c-2a13-452b-b51e-d606c976db49_terseLabel_en-US" xlink:label="lab_ptv_ResTORbioMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">resTORbio</link:label>
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    <link:label id="lab_ifrs-full_IssuedCapitalMember_48dfbe84-ba65-4b05-a3b4-c76d4b9c5288_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share Capital</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossBeforeTax_b5e16842-a6ad-4a80-985c-8dcc4fe770eb_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossBeforeTax" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income/(loss) before taxes</link:label>
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    <link:label id="lab_ptv_StockRepurchaseProgramNumberOfTranches_9dbccdd8-cfdf-44af-9bcc-3cee7267c672_terseLabel_en-US" xlink:label="lab_ptv_StockRepurchaseProgramNumberOfTranches" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of tranches</link:label>
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    <link:label id="lab_ifrs-full_MajorCustomersMember_900a9645-cace-476f-83e4-cb2137325e7f_terseLabel_en-US" xlink:label="lab_ifrs-full_MajorCustomersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customers over 10% of revenue</link:label>
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    <link:label id="lab_ifrs-full_PurchaseOfInterestsInAssociates_541a84c3-fbf1-40b8-a4b9-a73662120812_negatedLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfInterestsInAssociates" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment in associates</link:label>
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    <link:label id="lab_ptv_IntraGroupEliminationsMember_1cc69c95-5faf-4a5a-943d-73bce7ba98c4_terseLabel_en-US" xlink:label="lab_ptv_IntraGroupEliminationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intra-group eliminations</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesTable"/>
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    <link:label id="lab_ifrs-full_AccrualsClassifiedAsCurrent_0111506c-00c7-431c-84bb-2b343b1cc18a_terseLabel_en-US" xlink:label="lab_ifrs-full_AccrualsClassifiedAsCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued expenses</link:label>
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    <link:label id="lab_ptv_ExpenseInRespectOfRSULiabilityAward_9fe7c8a4-75d5-405b-9466-1a19d7b50dda_terseLabel_en-US" xlink:label="lab_ptv_ExpenseInRespectOfRSULiabilityAward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense in respect of RSU liability award</link:label>
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    <link:label id="lab_ptv_ExpenseInRespectOfRSULiabilityAward_documentation_en-US" xlink:label="lab_ptv_ExpenseInRespectOfRSULiabilityAward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expense in respect of RSU liability award</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_3b294cd0-1f12-4da1-9443-32c06bc29c24_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Owners of the Company</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_c6e3e22c-4217-4068-a7bd-9409d6304f34_verboseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income/(loss) for the year, attributable to the owners of the Company</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToOwnersOfParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss), attributable to owners of parent</link:label>
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    <link:label id="lab_ptv_WeightedAverageOptionsGrantedTable_2758b18b-1572-49f5-8fd0-887a87bc6634_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsGrantedTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average [Table]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsGrantedTable_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsGrantedTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options granted [Table]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsGrantedTable_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsGrantedTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsGrantedTable" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsGrantedTable"/>
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    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests_65005207-c383-4868-b68e-7d5d4d149881_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income, attributable to non-controlling interests</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:to="lab_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToAbstract_93bf61e6-e6fd-401c-98b4-d1e08255fb4d_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income/(loss) attributable to:</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToAbstract_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss), attributable to [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossAttributableToAbstract"/>
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    <link:label id="lab_ptv_TimeToLiquidityMeasurementInputMember_650a5204-f258-46bf-ae33-bae742ff99a8_terseLabel_en-US" xlink:label="lab_ptv_TimeToLiquidityMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Time to Liquidity</link:label>
    <link:label id="lab_ptv_TimeToLiquidityMeasurementInputMember_label_en-US" xlink:label="lab_ptv_TimeToLiquidityMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Time to Liquidity, measurement input [Member]</link:label>
    <link:label id="lab_ptv_TimeToLiquidityMeasurementInputMember_documentation_en-US" xlink:label="lab_ptv_TimeToLiquidityMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Time to Liquidity, measurement input</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TimeToLiquidityMeasurementInputMember" xlink:href="ptv-20221231.xsd#ptv_TimeToLiquidityMeasurementInputMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TimeToLiquidityMeasurementInputMember" xlink:to="lab_ptv_TimeToLiquidityMeasurementInputMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityLineItems_2d295a1b-1c2d-4d22-8e3b-02630ea555b4_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of changes in equity [line items]</link:label>
    <link:label id="lab_ifrs-full_StatementOfChangesInEquityLineItems_label_en-US" xlink:label="lab_ifrs-full_StatementOfChangesInEquityLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of changes in equity [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfChangesInEquityLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems" xlink:to="lab_ifrs-full_StatementOfChangesInEquityLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_Over10PercentOfRevenueMember_8fdfce4f-c898-48ef-a250-a85db8341c97_terseLabel_en-US" xlink:label="lab_ptv_Over10PercentOfRevenueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Over 10 percent of revenue</link:label>
    <link:label id="lab_ptv_Over10PercentOfRevenueMember_label_en-US" xlink:label="lab_ptv_Over10PercentOfRevenueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Over 10 percent of revenue [Member]</link:label>
    <link:label id="lab_ptv_Over10PercentOfRevenueMember_documentation_en-US" xlink:label="lab_ptv_Over10PercentOfRevenueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Over 10 percent of revenue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_Over10PercentOfRevenueMember" xlink:href="ptv-20221231.xsd#ptv_Over10PercentOfRevenueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_Over10PercentOfRevenueMember" xlink:to="lab_ptv_Over10PercentOfRevenueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SegmentsAxis_bc560395-2671-4396-905e-b8b06d12d859_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [axis]</link:label>
    <link:label id="lab_ifrs-full_SegmentsAxis_label_en-US" xlink:label="lab_ifrs-full_SegmentsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segments [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SegmentsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SegmentsAxis" xlink:to="lab_ifrs-full_SegmentsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NetAssetsLiabilities_3eab788e-e8ab-4346-abaa-23b8c93b6bb9_totalLabel_en-US" xlink:label="lab_ifrs-full_NetAssetsLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net assets/(liabilities)</link:label>
    <link:label id="lab_ifrs-full_NetAssetsLiabilities_03106381-ad47-4d5f-a60d-f557a368a873_terseLabel_en-US" xlink:label="lab_ifrs-full_NetAssetsLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net assets/(liabilities)</link:label>
    <link:label id="lab_ifrs-full_NetAssetsLiabilities_label_en-US" xlink:label="lab_ifrs-full_NetAssetsLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets (liabilities)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetAssetsLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NetAssetsLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NetAssetsLiabilities" xlink:to="lab_ifrs-full_NetAssetsLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EntitysTotalForRelatedPartiesMember_51cff977-f937-4e20-872f-cd2a63c806e5_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for related parties</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForRelatedPartiesMember_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for related parties [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:to="lab_ifrs-full_EntitysTotalForRelatedPartiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_2bf4bdaf-2231-43f6-8c02-9525d36509c5_totalLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net increase (decrease) in cash and cash equivalents</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in cash and cash equivalents before effect of exchange rate changes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges"/>
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    <link:label id="lab_ptv_OtherFinancialAssetsTableTextBlock_50f9e9df-320a-417a-bd29-8dfda2c0cd15_terseLabel_en-US" xlink:label="lab_ptv_OtherFinancialAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other financial assets</link:label>
    <link:label id="lab_ptv_OtherFinancialAssetsTableTextBlock_label_en-US" xlink:label="lab_ptv_OtherFinancialAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Financial Assets [Table Text Block]</link:label>
    <link:label id="lab_ptv_OtherFinancialAssetsTableTextBlock_documentation_en-US" xlink:label="lab_ptv_OtherFinancialAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Financial Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OtherFinancialAssetsTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_OtherFinancialAssetsTableTextBlock"/>
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    <link:label id="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsOutstandingInShareBasedPaymentArrangement_label_en-US" xlink:label="lab_ptv_WeightedAverageGrantDateFairValueOfOtherEquityInstrumentsOutstandingInShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average grant date fair value of other equity instruments outstanding in share-based payment arrangement</link:label>
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    <link:label id="lab_ptv_LeaseAt6TideStreetMember_documentation_en-US" xlink:label="lab_ptv_LeaseAt6TideStreetMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease At 6 Tide Street</link:label>
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    <link:label id="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis_4db173f6-a1bd-430b-8014-60631cfe44b0_terseLabel_en-US" xlink:label="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ranges of exercise prices for outstanding share options [axis]</link:label>
    <link:label id="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis_label_en-US" xlink:label="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ranges of exercise prices for outstanding share options [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsAxis"/>
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    <link:label id="lab_ptv_WeightedAverageNumberOfOrdinarySharesTableTextBlock_d195c783-f79c-4286-84bd-bfc50e7c1a50_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageNumberOfOrdinarySharesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of weighted-average number of ordinary shares</link:label>
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    <link:label id="lab_dei_DocumentInformationTable_fa301654-f387-47ce-8646-b5256f5df319_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document and Entity Information [Table]</link:label>
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    <link:label id="lab_ptv_PerformanceSharePlanTable_baed0140-9bbb-4a2e-b73e-2079cd250e5b_terseLabel_en-US" xlink:label="lab_ptv_PerformanceSharePlanTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Plan [Table]</link:label>
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    <link:label id="lab_ptv_PerformanceSharePlanTable_documentation_en-US" xlink:label="lab_ptv_PerformanceSharePlanTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Plan [Table]</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract_3aca3a47-9712-4fad-bd8f-ed04d46902d2_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from financing activities:</link:label>
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    <link:label id="lab_ifrs-full_TypesOfInterestRatesAxis_fa2a8c29-42af-4f15-bc18-38737bdcfbdd_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfInterestRatesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of interest rates [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfInterestRatesAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfInterestRatesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of interest rates [axis]</link:label>
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    <link:label id="lab_ifrs-full_FinancialAssetsTypeMember_3122c417-ff3f-4d13-9117-7b2667994aba_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsTypeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets, type [member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory_8f6c211b-91ff-4d08-a84b-3ab4719a46b2_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of unrecognized deferred tax assets</link:label>
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    <link:label id="lab_ptv_SupplementalDisclosureOfNonCashInvestmentAndFinancingActivitiesAbstract_677dceb0-840e-448a-afb6-32fe9158ed57_terseLabel_en-US" xlink:label="lab_ptv_SupplementalDisclosureOfNonCashInvestmentAndFinancingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Supplemental disclosure of non-cash investment and financing activities:</link:label>
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    <link:label id="lab_ifrs-full_TypesOfRisksAxis_0133eb15-1911-40d3-b49d-ec061907b152_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfRisksAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of risks [axis]</link:label>
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    <link:label id="lab_ptv_WeightedAverageExercisePriceOfShareOptionsForfeitedAndExpiredInShareBasedPaymentArrangement_26de4990-ce11-420a-b976-021eed8ccd25_verboseLabel_en-US" xlink:label="lab_ptv_WeightedAverageExercisePriceOfShareOptionsForfeitedAndExpiredInShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price, options forfeited and expired (in GBP per share)</link:label>
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    <link:label id="lab_ifrs-full_NoncontrollingInterestsMember_4712d60d-f831-47b6-a96b-8a5d70c26577_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterestsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
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    <link:label id="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsDomain_352110a1-130f-475a-95cc-0b9aa8562689_terseLabel_en-US" xlink:label="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Loss Carryforwards, Expiration Periods [Domain]</link:label>
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    <link:label id="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsDomain_documentation_en-US" xlink:label="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Loss Carryforwards, Expiration Periods</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OperatingLossCarryforwardsExpirationPeriodsDomain" xlink:href="ptv-20221231.xsd#ptv_OperatingLossCarryforwardsExpirationPeriodsDomain"/>
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    <link:label id="lab_ptv_EnsofBiosystemsIncMember_fa92ee74-e30c-4dfa-b865-eabd16571a22_verboseLabel_en-US" xlink:label="lab_ptv_EnsofBiosystemsIncMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ensof Biosystems, Inc. (held indirectly through Enlight)</link:label>
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    <link:label id="lab_ptv_EnsofBiosystemsIncMember_documentation_en-US" xlink:label="lab_ptv_EnsofBiosystemsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ensof Biosystems Inc</link:label>
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    <link:label id="lab_ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember_ba8da4a8-10fa-4c1c-8791-404cd54ad72f_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for impairment of financial assets [member]</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for impairment of financial assets [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember" xlink:to="lab_ifrs-full_EntitysTotalForImpairmentOfFinancialAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_e946250e-b03e-493b-b0e5-2cef21d2ea40_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
    <link:label id="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_label_en-US" xlink:label="lab_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of share-based payment arrangements [axis]</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherPayablesAbstract_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherPayablesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other payables [abstract]</link:label>
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    <link:label id="lab_ptv_CapStarSpecialPurposeAcquisitionCorpMember_88fe2158-65a7-4a33-9c83-6834ae811134_terseLabel_en-US" xlink:label="lab_ptv_CapStarSpecialPurposeAcquisitionCorpMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CapStar Special Purpose Acquisition Corp</link:label>
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    <link:label id="lab_ptv_CapStarSpecialPurposeAcquisitionCorpMember_documentation_en-US" xlink:label="lab_ptv_CapStarSpecialPurposeAcquisitionCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CapStar Special Purpose Acquisition Corp</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CapStarSpecialPurposeAcquisitionCorpMember" xlink:to="lab_ptv_CapStarSpecialPurposeAcquisitionCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansTable_7239c99a-02a0-40de-8bf5-d327540f3ed5_terseLabel_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Table]</link:label>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansTable_label_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Table]</link:label>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansTable_documentation_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SignificantSubsidiaryPlansTable" xlink:href="ptv-20221231.xsd#ptv_SignificantSubsidiaryPlansTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SignificantSubsidiaryPlansTable" xlink:to="lab_ptv_SignificantSubsidiaryPlansTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ScheduleOfContractBalancesTableTextBlock_c2ee51ce-ddd7-47e9-9d5c-f370041bad40_terseLabel_en-US" xlink:label="lab_ptv_ScheduleOfContractBalancesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of contract balances</link:label>
    <link:label id="lab_ptv_ScheduleOfContractBalancesTableTextBlock_label_en-US" xlink:label="lab_ptv_ScheduleOfContractBalancesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Contract Balances [Table Text Block]</link:label>
    <link:label id="lab_ptv_ScheduleOfContractBalancesTableTextBlock_documentation_en-US" xlink:label="lab_ptv_ScheduleOfContractBalancesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Contract Balances</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ScheduleOfContractBalancesTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_ScheduleOfContractBalancesTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ScheduleOfContractBalancesTableTextBlock" xlink:to="lab_ptv_ScheduleOfContractBalancesTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComprehensiveIncome_0d2a1800-f28d-4b76-a501-d7cc84126003_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income/(loss) for the year</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncome_1dcc81e2-b81a-4bcc-b2f1-ea59d525cf0d_totalLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income/(loss) for the year</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncome_34b3a2cb-52ca-45e0-845a-7969c15c9d8e_verboseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of comprehensive income (loss)</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncome_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ComprehensiveIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncome" xlink:to="lab_ifrs-full_ComprehensiveIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_fe5d2e59-6809-4c17-93e1-c41312bb736e_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions other than through business combinations, intangible assets other than goodwill</link:label>
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    <link:label id="lab_ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate_57d58695-4334-4872-accc-e076b9d6f9b9_terseLabel_en-US" xlink:label="lab_ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent consideration recognised as of acquisition date</link:label>
    <link:label id="lab_ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate_label_en-US" xlink:label="lab_ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contingent consideration recognised as of acquisition date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate" xlink:to="lab_ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ValuationTechniquesMember_081914ae-0c0f-42ab-896e-e65eee13a63c_terseLabel_en-US" xlink:label="lab_ifrs-full_ValuationTechniquesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Valuation techniques</link:label>
    <link:label id="lab_ifrs-full_ValuationTechniquesMember_label_en-US" xlink:label="lab_ifrs-full_ValuationTechniquesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Valuation techniques [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ValuationTechniquesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ValuationTechniquesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ValuationTechniquesMember" xlink:to="lab_ifrs-full_ValuationTechniquesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesLineItems_102d9a8e-0210-458d-91eb-f29c3fd1cedc_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSensitivityAnalysisOfFairValueMeasurementToChangesInUnobservableInputsLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of sensitivity analysis of fair value measurement to changes in unobservable inputs, liabilities [line items]</link:label>
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    <link:label id="lab_ptv_DrBharattChowriraMember_7be8b3aa-b211-4d05-b4ac-952b50566600_terseLabel_en-US" xlink:label="lab_ptv_DrBharattChowriraMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Bharatt Chowrira</link:label>
    <link:label id="lab_ptv_DrBharattChowriraMember_label_en-US" xlink:label="lab_ptv_DrBharattChowriraMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Bharatt Chowrira [Member]</link:label>
    <link:label id="lab_ptv_DrBharattChowriraMember_documentation_en-US" xlink:label="lab_ptv_DrBharattChowriraMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Bharatt Chowrira</link:label>
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    <link:label id="lab_ptv_ExpectedTermMeasurementInputMember_367ef24a-4847-4637-a905-f696d6ebc7d1_terseLabel_en-US" xlink:label="lab_ptv_ExpectedTermMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected term</link:label>
    <link:label id="lab_ptv_ExpectedTermMeasurementInputMember_label_en-US" xlink:label="lab_ptv_ExpectedTermMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected term, measurement input [Member]</link:label>
    <link:label id="lab_ptv_ExpectedTermMeasurementInputMember_documentation_en-US" xlink:label="lab_ptv_ExpectedTermMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected term, measurement input</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ExpectedTermMeasurementInputMember" xlink:href="ptv-20221231.xsd#ptv_ExpectedTermMeasurementInputMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ExpectedTermMeasurementInputMember" xlink:to="lab_ptv_ExpectedTermMeasurementInputMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_4cbdaa41-6bde-40d1-bdbc-ec134cf5deda_terseLabel_en-US" xlink:label="lab_ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment of investment</link:label>
    <link:label id="lab_ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_label_en-US" xlink:label="lab_ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment loss (reversal of impairment loss) recognised in profit or loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"/>
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    <link:label id="lab_ptv_WeightedAverageOptionsGrantedLineItems_b7860659-2291-43b6-913f-9d1155cdee91_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsGrantedLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options granted [Line Items]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsGrantedLineItems" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsGrantedLineItems"/>
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    <link:label id="lab_ptv_ProfitLossBeforeTaxPreIFRS9FairValueAccountingFinanceCostsSubsidiaryPreferredSharesShareBasedPaymentExpenseDepreciationOfTangibleAssetsAndAmortizationOfIntangibleAssets_label_en-US" xlink:label="lab_ptv_ProfitLossBeforeTaxPreIFRS9FairValueAccountingFinanceCostsSubsidiaryPreferredSharesShareBasedPaymentExpenseDepreciationOfTangibleAssetsAndAmortizationOfIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit Loss Before Tax pre IFRS 9 fair value accounting, finance costs &#8211; subsidiary preferred shares, share-based payment expense, depreciation of tangible assets and amortization of intangible assets</link:label>
    <link:label id="lab_ptv_ProfitLossBeforeTaxPreIFRS9FairValueAccountingFinanceCostsSubsidiaryPreferredSharesShareBasedPaymentExpenseDepreciationOfTangibleAssetsAndAmortizationOfIntangibleAssets_documentation_en-US" xlink:label="lab_ptv_ProfitLossBeforeTaxPreIFRS9FairValueAccountingFinanceCostsSubsidiaryPreferredSharesShareBasedPaymentExpenseDepreciationOfTangibleAssetsAndAmortizationOfIntangibleAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit Loss Before Tax pre IFRS 9 fair value accounting, finance costs &#8211; subsidiary preferred shares, share-based payment expense, depreciation of tangible assets and amortization of intangible assets</link:label>
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    <link:label id="lab_ptv_DisclosureOfEstimatedUsefulLifeOfAssetsTableTextBlock_3a2eda83-00db-4c44-8039-fb0b6c393707_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfEstimatedUsefulLifeOfAssetsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of estimated useful life of assets</link:label>
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    <link:label id="lab_ptv_WeightedAverageOptionsGrantedAbstract_75329e90-82a1-4665-abb8-9521fa4e4606_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsGrantedAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options granted [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsGrantedAbstract_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsGrantedAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options granted [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsGrantedAbstract_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsGrantedAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options granted</link:label>
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    <link:label id="lab_ptv_DisclosureOfAccumulatedDepreciationAndImpairmentLossTableTextBlock_2ea15e18-e169-44d4-bf94-5fa0028c6bcc_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfAccumulatedDepreciationAndImpairmentLossTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of accumulated depreciation and impairment loss</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfAccumulatedDepreciationAndImpairmentLossTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfAccumulatedDepreciationAndImpairmentLossTableTextBlock"/>
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    <link:label id="lab_ptv_ExercisePriceRangeTwoMember_276427ce-d1f7-412a-b0b2-ac3b6991546f_terseLabel_en-US" xlink:label="lab_ptv_ExercisePriceRangeTwoMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">1.00 to 2.00</link:label>
    <link:label id="lab_ptv_ExercisePriceRangeTwoMember_label_en-US" xlink:label="lab_ptv_ExercisePriceRangeTwoMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range Two [Member]</link:label>
    <link:label id="lab_ptv_ExercisePriceRangeTwoMember_documentation_en-US" xlink:label="lab_ptv_ExercisePriceRangeTwoMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range Two [Member]</link:label>
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    <link:label id="lab_ptv_RelatedPartyTransactionsTable_2bc6737c-5747-4b37-8c0e-a90889968eef_terseLabel_en-US" xlink:label="lab_ptv_RelatedPartyTransactionsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related party transactions [Table]</link:label>
    <link:label id="lab_ptv_RelatedPartyTransactionsTable_label_en-US" xlink:label="lab_ptv_RelatedPartyTransactionsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related party transactions [Table]</link:label>
    <link:label id="lab_ptv_RelatedPartyTransactionsTable_documentation_en-US" xlink:label="lab_ptv_RelatedPartyTransactionsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related party transactions</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RelatedPartyTransactionsTable" xlink:to="lab_ptv_RelatedPartyTransactionsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_3e51f5aa-ae5d-4755-93ad-aa7758785cd1_verboseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2025</link:label>
    <link:label id="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_efe8532a-2f84-4283-812d-99e8c4c103ff_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Two to three years</link:label>
    <link:label id="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than two years and not later than three years [member]</link:label>
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    <link:label id="lab_ptv_ShareBasedPaymentsMember_d1ce6ef6-cde6-470f-8343-8b8585267c31_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payments</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentsMember_label_en-US" xlink:label="lab_ptv_ShareBasedPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payments [Member]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentsMember_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payments</link:label>
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    <link:label id="lab_ptv_CurrentLiabilitiesFromShareBasedPaymentTransactions_ecf96ac4-462e-4f8e-bbec-bdd8939cc9d2_terseLabel_en-US" xlink:label="lab_ptv_CurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities from share based payment transactions</link:label>
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    <link:label id="lab_ptv_CurrentLiabilitiesFromShareBasedPaymentTransactions_documentation_en-US" xlink:label="lab_ptv_CurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Liabilities From Share based Payment Transactions</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures_d3f5129d-ff2f-401e-9285-5bcc6deeefe3_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of Subsidiary Convertible Note</link:label>
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    <link:label id="lab_ptv_FinancialInstrumentsWarrantsTable_20137a70-4ecc-490c-b0a6-5e8b45bba7eb_terseLabel_en-US" xlink:label="lab_ptv_FinancialInstrumentsWarrantsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments - Warrants [Table]</link:label>
    <link:label id="lab_ptv_FinancialInstrumentsWarrantsTable_label_en-US" xlink:label="lab_ptv_FinancialInstrumentsWarrantsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments - Warrants [Table]</link:label>
    <link:label id="lab_ptv_FinancialInstrumentsWarrantsTable_documentation_en-US" xlink:label="lab_ptv_FinancialInstrumentsWarrantsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments - Warrants [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinancialInstrumentsWarrantsTable" xlink:href="ptv-20221231.xsd#ptv_FinancialInstrumentsWarrantsTable"/>
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    <link:label id="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory_e9f02499-b00b-44c2-a379-8eb0a0ed6029_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfQuantitativeInformationAboutRightofuseAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of quantitative information about right-of-use assets</link:label>
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    <link:label id="lab_ifrs-full_InvestmentsInAssociates_5096580f-3001-4ddb-aa5b-5d3a146f1386_terseLabel_en-US" xlink:label="lab_ifrs-full_InvestmentsInAssociates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment in associates - equity method</link:label>
    <link:label id="lab_ifrs-full_InvestmentsInAssociates_84bc57cf-8d54-4f54-a0fb-fee70dd5ee6a_periodStartLabel_en-US" xlink:label="lab_ifrs-full_InvestmentsInAssociates" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">As of period start</link:label>
    <link:label id="lab_ifrs-full_InvestmentsInAssociates_d0c68b4d-1a02-4f88-8009-509e3cd5c937_periodEndLabel_en-US" xlink:label="lab_ifrs-full_InvestmentsInAssociates" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">As of period end</link:label>
    <link:label id="lab_ifrs-full_InvestmentsInAssociates_label_en-US" xlink:label="lab_ifrs-full_InvestmentsInAssociates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments in associates reported in separate financial statements</link:label>
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    <link:label id="lab_ptv_ShareBasedPaymentsAbstract_a399e96e-0b68-479e-bee6-238896bec9ac_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Expense [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_AverageEffectiveTaxRate_f4e0035e-789b-415c-8071-e163f68eaac0_totalLabel_en-US" xlink:label="lab_ifrs-full_AverageEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Average effective tax rate</link:label>
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    <link:label id="lab_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_b6032a11-f11f-4604-8c31-32e963d004ce_terseLabel_en-US" xlink:label="lab_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax Losses</link:label>
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    <link:label id="lab_ifrs-full_InterestRateTypesMember_7a972059-5c82-44e1-acd6-9b2b89c83076_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestRateTypesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate types [member]</link:label>
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    <link:label id="lab_ptv_NumberOfShareOptionsDeconsolidatedInShareBasedPaymentArrangement_1457d42e-5e68-4fef-8866-7a341ab84a9f_negatedLabel_en-US" xlink:label="lab_ptv_NumberOfShareOptionsDeconsolidatedInShareBasedPaymentArrangement" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation (in shares)</link:label>
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    <link:label id="lab_ifrs-full_UnearnedFinanceIncomeRelatingToFinanceLeasePaymentsReceivable_f5583b60-7ef8-418d-8ccb-02b9aca02fa2_terseLabel_en-US" xlink:label="lab_ifrs-full_UnearnedFinanceIncomeRelatingToFinanceLeasePaymentsReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unearned Finance income</link:label>
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    <link:label id="lab_ptv_GelesisHoldingsIncMember_91422c73-dc78-461a-8991-acb9b50d8b8c_terseLabel_en-US" xlink:label="lab_ptv_GelesisHoldingsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gelesis Holdings Inc.</link:label>
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    <link:label id="lab_ptv_EarningsLossPerShareLineItems_2a954979-7d6e-46f3-baa5-61fab1620462_terseLabel_en-US" xlink:label="lab_ptv_EarningsLossPerShareLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Loss per Share [Line Items]</link:label>
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    <link:label id="lab_ptv_WeightedAverageOptionsForfeitedTable_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsForfeitedTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options forfeited [Table]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsForfeitedTable_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsForfeitedTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options forfeited [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsForfeitedTable" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsForfeitedTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageOptionsForfeitedTable" xlink:to="lab_ptv_WeightedAverageOptionsForfeitedTable" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentRegistrationStatement_0ad481e6-56fb-4a0b-994c-3895805ef31b_terseLabel_en-US" xlink:label="lab_dei_DocumentRegistrationStatement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Registration Statement</link:label>
    <link:label id="lab_dei_DocumentRegistrationStatement_label_en-US" xlink:label="lab_dei_DocumentRegistrationStatement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Registration Statement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentRegistrationStatement" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentRegistrationStatement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentRegistrationStatement" xlink:to="lab_dei_DocumentRegistrationStatement" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RevenueLineItems_c11dd549-3e53-4338-8382-b8851ff20067_terseLabel_en-US" xlink:label="lab_ptv_RevenueLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue [Line Items]</link:label>
    <link:label id="lab_ptv_RevenueLineItems_label_en-US" xlink:label="lab_ptv_RevenueLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue [Line Items]</link:label>
    <link:label id="lab_ptv_RevenueLineItems_documentation_en-US" xlink:label="lab_ptv_RevenueLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RevenueLineItems" xlink:href="ptv-20221231.xsd#ptv_RevenueLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RevenueLineItems" xlink:to="lab_ptv_RevenueLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfInformationOfEmployeesLineItems_7a74a58c-7610-4e90-8424-0aaf200b0e6d_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfInformationOfEmployeesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information of employees [Line Items]</link:label>
    <link:label id="lab_ptv_DisclosureOfInformationOfEmployeesLineItems_label_en-US" xlink:label="lab_ptv_DisclosureOfInformationOfEmployeesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information of employees [Line Items]</link:label>
    <link:label id="lab_ptv_DisclosureOfInformationOfEmployeesLineItems_documentation_en-US" xlink:label="lab_ptv_DisclosureOfInformationOfEmployeesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information of employees [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfInformationOfEmployeesLineItems" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfInformationOfEmployeesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfInformationOfEmployeesLineItems" xlink:to="lab_ptv_DisclosureOfInformationOfEmployeesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LibraBiosciencesIncMember_b41db059-b366-42a9-afc1-87cd629404dd_verboseLabel_en-US" xlink:label="lab_ptv_LibraBiosciencesIncMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Libra Biosciences, Inc.</link:label>
    <link:label id="lab_ptv_LibraBiosciencesIncMember_label_en-US" xlink:label="lab_ptv_LibraBiosciencesIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Libra Biosciences Inc [Member]</link:label>
    <link:label id="lab_ptv_LibraBiosciencesIncMember_documentation_en-US" xlink:label="lab_ptv_LibraBiosciencesIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Libra Biosciences Inc</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LibraBiosciencesIncMember" xlink:href="ptv-20221231.xsd#ptv_LibraBiosciencesIncMember"/>
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    <link:label id="lab_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets_77a1d9b9-ffb9-4a78-8f68-da88526f6c15_terseLabel_en-US" xlink:label="lab_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of reasonably possible increase in unobservable input, assets</link:label>
    <link:label id="lab_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets_label_en-US" xlink:label="lab_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of reasonably possible increase in unobservable input, assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:to="lab_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_UnobservableInputsAxis_9d821b85-f620-4c12-8654-29baa5fc4b73_terseLabel_en-US" xlink:label="lab_ifrs-full_UnobservableInputsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unobservable inputs [axis]</link:label>
    <link:label id="lab_ifrs-full_UnobservableInputsAxis_label_en-US" xlink:label="lab_ifrs-full_UnobservableInputsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unobservable inputs [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnobservableInputsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_UnobservableInputsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_UnobservableInputsAxis" xlink:to="lab_ifrs-full_UnobservableInputsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NonexecutiveDirectorsMember_7cd01f8c-ab1a-431b-84b9-de166afe5122_terseLabel_en-US" xlink:label="lab_ptv_NonexecutiveDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nonexecutive Directors</link:label>
    <link:label id="lab_ptv_NonexecutiveDirectorsMember_label_en-US" xlink:label="lab_ptv_NonexecutiveDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nonexecutive Directors [Member]</link:label>
    <link:label id="lab_ptv_NonexecutiveDirectorsMember_documentation_en-US" xlink:label="lab_ptv_NonexecutiveDirectorsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nonexecutive Directors</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NonexecutiveDirectorsMember" xlink:href="ptv-20221231.xsd#ptv_NonexecutiveDirectorsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NonexecutiveDirectorsMember" xlink:to="lab_ptv_NonexecutiveDirectorsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CashInDeconsolidatedSubsidiary_02974e53-da89-4d01-8b57-827015ba8e2e_negatedTerseLabel_en-US" xlink:label="lab_ptv_CashInDeconsolidatedSubsidiary" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash derecognized upon loss of control over subsidiary (see table below)</link:label>
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    <link:label id="lab_ptv_CashInDeconsolidatedSubsidiary_documentation_en-US" xlink:label="lab_ptv_CashInDeconsolidatedSubsidiary" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash In Deconsolidated Subsidiary</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CashInDeconsolidatedSubsidiary" xlink:href="ptv-20221231.xsd#ptv_CashInDeconsolidatedSubsidiary"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CashInDeconsolidatedSubsidiary" xlink:to="lab_ptv_CashInDeconsolidatedSubsidiary" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AtFairValueMember_6c354a0a-4df3-405c-b387-5523e3f9d4dc_terseLabel_en-US" xlink:label="lab_ifrs-full_AtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At fair value</link:label>
    <link:label id="lab_ifrs-full_AtFairValueMember_label_en-US" xlink:label="lab_ifrs-full_AtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">At fair value [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AtFairValueMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AtFairValueMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AtFairValueMember" xlink:to="lab_ifrs-full_AtFairValueMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PureTechSecuritiesCorpMember_ff67ff90-73cf-41ca-9d6c-ee50741064e2_verboseLabel_en-US" xlink:label="lab_ptv_PureTechSecuritiesCorpMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Securities Corp.</link:label>
    <link:label id="lab_ptv_PureTechSecuritiesCorpMember_label_en-US" xlink:label="lab_ptv_PureTechSecuritiesCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Securities Corp. [Member]</link:label>
    <link:label id="lab_ptv_PureTechSecuritiesCorpMember_documentation_en-US" xlink:label="lab_ptv_PureTechSecuritiesCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Securities Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PureTechSecuritiesCorpMember" xlink:href="ptv-20221231.xsd#ptv_PureTechSecuritiesCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PureTechSecuritiesCorpMember" xlink:to="lab_ptv_PureTechSecuritiesCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RightofuseAssetsMember_e78d7fc8-edeb-4b74-a11c-01895d846f3c_terseLabel_en-US" xlink:label="lab_ifrs-full_RightofuseAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ROU asset</link:label>
    <link:label id="lab_ifrs-full_RightofuseAssetsMember_label_en-US" xlink:label="lab_ifrs-full_RightofuseAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Right-of-use assets [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RightofuseAssetsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RightofuseAssetsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RightofuseAssetsMember" xlink:to="lab_ifrs-full_RightofuseAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GoodsOrServicesTransferredOverTimeMember_4776471e-32d7-4528-9073-c22f31ca91e3_terseLabel_en-US" xlink:label="lab_ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transferred over time</link:label>
    <link:label id="lab_ifrs-full_GoodsOrServicesTransferredOverTimeMember_label_en-US" xlink:label="lab_ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goods or services transferred over time [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GoodsOrServicesTransferredOverTimeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:to="lab_ifrs-full_GoodsOrServicesTransferredOverTimeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased_bad12dba-b747-47ed-ba43-7b468b076d36_terseLabel_en-US" xlink:label="lab_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise of call options, maximum number of common stocks to be purchased (in shares)</link:label>
    <link:label id="lab_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased_label_en-US" xlink:label="lab_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Of Call Options, Maximum Number Of Common Stocks To Be Purchased</link:label>
    <link:label id="lab_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased_documentation_en-US" xlink:label="lab_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Of Call Options, Maximum Number Of Common Stocks To Be Purchased</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased" xlink:href="ptv-20221231.xsd#ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased" xlink:to="lab_ptv_ExerciseOfCallOptionsMaximumNumberOfCommonStocksToBePurchased" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_MaximumMember_4b440a7a-4dd9-4e26-8d1b-226791d3c84c_terseLabel_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum</link:label>
    <link:label id="lab_srt_MaximumMember_label_en-US" xlink:label="lab_srt_MaximumMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember" xlink:to="lab_srt_MaximumMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForSharebasedPayments_9b5cd16d-dd8a-4954-b0fc-464f5028ad13_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForSharebasedPayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based compensation expense</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForSharebasedPayments_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForSharebasedPayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for share-based payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForSharebasedPayments" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForSharebasedPayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForSharebasedPayments" xlink:to="lab_ifrs-full_AdjustmentsForSharebasedPayments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory_78592716-b620-4bae-85f9-446880a24d7b_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in equity classified non-controlling ownership interests in subsidiaries</link:label>
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    <link:label id="lab_ifrs-full_NotLaterThanOneYearMember_9fb548ca-f76a-44de-ae5c-bf5e8b755953_verboseLabel_en-US" xlink:label="lab_ifrs-full_NotLaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2023</link:label>
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    <link:label id="lab_ifrs-full_NotLaterThanOneYearMember_label_en-US" xlink:label="lab_ifrs-full_NotLaterThanOneYearMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not later than one year [member]</link:label>
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    <link:label id="lab_ptv_CustomerEMember_6874dcae-bd57-4578-b7c7-ad17cb9939d4_terseLabel_en-US" xlink:label="lab_ptv_CustomerEMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer E</link:label>
    <link:label id="lab_ptv_CustomerEMember_label_en-US" xlink:label="lab_ptv_CustomerEMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer E [Member]</link:label>
    <link:label id="lab_ptv_CustomerEMember_documentation_en-US" xlink:label="lab_ptv_CustomerEMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer E</link:label>
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    <link:label id="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercentage_41324d2a-81cf-4504-8fbb-072567b30f48_terseLabel_en-US" xlink:label="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercentage" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity analysis for equity price risk, impact on pre-tax earnings, percentage</link:label>
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    <link:label id="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercentage_documentation_en-US" xlink:label="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercentage" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Percentage</link:label>
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    <link:label id="lab_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember_58972dc7-44d7-418f-b5b9-7e72ff9e6eb6_terseLabel_en-US" xlink:label="lab_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr John LaMattina and Ms Mary LaMattina</link:label>
    <link:label id="lab_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember_label_en-US" xlink:label="lab_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr John LaMattina and Ms Mary LaMattina [Member]</link:label>
    <link:label id="lab_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember_documentation_en-US" xlink:label="lab_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr John LaMattina and Ms Mary LaMattina</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember" xlink:href="ptv-20221231.xsd#ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember" xlink:to="lab_ptv_DrJohnLaMattinaAndMsMaryLaMattinaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives_d44fc3f4-5e32-494a-b273-5b575af0ba8d_terseLabel_en-US" xlink:label="lab_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leasehold improvements purchased through lease incentives (deducted from Right of Use Asset)</link:label>
    <link:label id="lab_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives_label_en-US" xlink:label="lab_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leasehold improvements purchased through lease incentives</link:label>
    <link:label id="lab_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives_documentation_en-US" xlink:label="lab_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leasehold improvements purchased through lease incentives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives" xlink:href="ptv-20221231.xsd#ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives" xlink:to="lab_ptv_LeaseholdImprovementsPurchasedThroughLeaseIncentives" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareBasedPaymentsTableTable_6f3b0e62-8940-4761-82a6-bec015269c43_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentsTableTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payments Table [Table]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentsTableTable_label_en-US" xlink:label="lab_ptv_ShareBasedPaymentsTableTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payments Table [Table]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentsTableTable_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentsTableTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payments Table [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentsTableTable" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentsTableTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedPaymentsTableTable" xlink:to="lab_ptv_ShareBasedPaymentsTableTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SignificantUnobservableInputAssets_4551b703-4bcf-4bfd-a41f-5e32d5d0c653_terseLabel_en-US" xlink:label="lab_ifrs-full_SignificantUnobservableInputAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average</link:label>
    <link:label id="lab_ifrs-full_SignificantUnobservableInputAssets_label_en-US" xlink:label="lab_ifrs-full_SignificantUnobservableInputAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant unobservable input, assets</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SignificantUnobservableInputAssets" xlink:to="lab_ifrs-full_SignificantUnobservableInputAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GrossCarryingAmountMember_a46708d8-2d3f-4c51-b891-fa2e5d9e9701_verboseLabel_en-US" xlink:label="lab_ifrs-full_GrossCarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cost</link:label>
    <link:label id="lab_ifrs-full_GrossCarryingAmountMember_8e1322d7-7498-4010-9285-7a3a097195d2_terseLabel_en-US" xlink:label="lab_ifrs-full_GrossCarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Principal</link:label>
    <link:label id="lab_ifrs-full_GrossCarryingAmountMember_label_en-US" xlink:label="lab_ifrs-full_GrossCarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross carrying amount [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GrossCarryingAmountMember" xlink:to="lab_ifrs-full_GrossCarryingAmountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ProceedsFromIssueOfSharesToNCI_2c4f16c5-2107-46de-a203-e078c86d5bf8_terseLabel_en-US" xlink:label="lab_ptv_ProceedsFromIssueOfSharesToNCI" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">NCI exercise of stock options in subsidiary</link:label>
    <link:label id="lab_ptv_ProceedsFromIssueOfSharesToNCI_label_en-US" xlink:label="lab_ptv_ProceedsFromIssueOfSharesToNCI" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds From Issue Of shares to NCI</link:label>
    <link:label id="lab_ptv_ProceedsFromIssueOfSharesToNCI_documentation_en-US" xlink:label="lab_ptv_ProceedsFromIssueOfSharesToNCI" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds From Issue Of shares to NCI</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ProceedsFromIssueOfSharesToNCI" xlink:href="ptv-20221231.xsd#ptv_ProceedsFromIssueOfSharesToNCI"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ProceedsFromIssueOfSharesToNCI" xlink:to="lab_ptv_ProceedsFromIssueOfSharesToNCI" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock_df9efa98-6e98-4773-8f1e-46a7813a5ad5_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of accumulated amortization</link:label>
    <link:label id="lab_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Accumulated amortization [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Accumulated amortization</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfAccumulatedAmortizationTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock" xlink:to="lab_ptv_DisclosureOfAccumulatedAmortizationTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PreferredDSharesMember_ec505387-08b4-42f2-98fd-f156ef337f21_terseLabel_en-US" xlink:label="lab_ptv_PreferredDSharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred D shares</link:label>
    <link:label id="lab_ptv_PreferredDSharesMember_label_en-US" xlink:label="lab_ptv_PreferredDSharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred D shares [Member]</link:label>
    <link:label id="lab_ptv_PreferredDSharesMember_documentation_en-US" xlink:label="lab_ptv_PreferredDSharesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred D shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PreferredDSharesMember" xlink:href="ptv-20221231.xsd#ptv_PreferredDSharesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PreferredDSharesMember" xlink:to="lab_ptv_PreferredDSharesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CustomerCMember_acbe418c-b43d-44f3-8665-7306956d2fa4_terseLabel_en-US" xlink:label="lab_ptv_CustomerCMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer C</link:label>
    <link:label id="lab_ptv_CustomerCMember_label_en-US" xlink:label="lab_ptv_CustomerCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer C [Member]</link:label>
    <link:label id="lab_ptv_CustomerCMember_documentation_en-US" xlink:label="lab_ptv_CustomerCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer C</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CustomerCMember" xlink:href="ptv-20221231.xsd#ptv_CustomerCMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CustomerCMember" xlink:to="lab_ptv_CustomerCMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_OtherResearchAndDevelopmentExpense_c234a343-358e-4e61-afe1-276a57fea0a0_terseLabel_en-US" xlink:label="lab_ptv_OtherResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other research and development expenses</link:label>
    <link:label id="lab_ptv_OtherResearchAndDevelopmentExpense_label_en-US" xlink:label="lab_ptv_OtherResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Research And Development Expense</link:label>
    <link:label id="lab_ptv_OtherResearchAndDevelopmentExpense_documentation_en-US" xlink:label="lab_ptv_OtherResearchAndDevelopmentExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Research And Development Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OtherResearchAndDevelopmentExpense" xlink:href="ptv-20221231.xsd#ptv_OtherResearchAndDevelopmentExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_OtherResearchAndDevelopmentExpense" xlink:to="lab_ptv_OtherResearchAndDevelopmentExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_UnrecognizedDeferredTaxAssetsLineItems_1fa42592-9785-43ab-bd21-ae7aa4d216ab_terseLabel_en-US" xlink:label="lab_ptv_UnrecognizedDeferredTaxAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized deferred tax assets [Line Items]</link:label>
    <link:label id="lab_ptv_UnrecognizedDeferredTaxAssetsLineItems_label_en-US" xlink:label="lab_ptv_UnrecognizedDeferredTaxAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized deferred tax assets [Line Items]</link:label>
    <link:label id="lab_ptv_UnrecognizedDeferredTaxAssetsLineItems_documentation_en-US" xlink:label="lab_ptv_UnrecognizedDeferredTaxAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognized deferred tax assets [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_UnrecognizedDeferredTaxAssetsLineItems" xlink:href="ptv-20221231.xsd#ptv_UnrecognizedDeferredTaxAssetsLineItems"/>
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    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_d90f4ec3-4e7f-485a-9d4d-0730c60f02e3_periodStartLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding at beginning of period (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_1fa2c222-3001-4e24-90a5-053bce9363c3_periodEndLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding at end of period (in shares)</link:label>
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    <link:label id="lab_ifrs-full_NumberOfOutstandingShareOptions_label_en-US" xlink:label="lab_ifrs-full_NumberOfOutstandingShareOptions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options outstanding in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOutstandingShareOptions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfOutstandingShareOptions"/>
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    <link:label id="lab_ptv_ConversionToPreferred_6b55a418-0573-4fbe-a082-21d40e287dea_terseLabel_en-US" xlink:label="lab_ptv_ConversionToPreferred" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion to subsidiary preferred shares</link:label>
    <link:label id="lab_ptv_ConversionToPreferred_label_en-US" xlink:label="lab_ptv_ConversionToPreferred" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion to preferred</link:label>
    <link:label id="lab_ptv_ConversionToPreferred_documentation_en-US" xlink:label="lab_ptv_ConversionToPreferred" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Conversion to preferred</link:label>
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    <link:label id="lab_ifrs-full_CurrentReceivablesDueFromAssociates_9f97472d-97b2-4bfc-9cce-c7c30e0f1619_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentReceivablesDueFromAssociates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note from associate</link:label>
    <link:label id="lab_ifrs-full_CurrentReceivablesDueFromAssociates_1cba72d8-95dd-4e39-afaa-3fd66f7b72ba_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentReceivablesDueFromAssociates" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current receivables due from associates</link:label>
    <link:label id="lab_ifrs-full_CurrentReceivablesDueFromAssociates_label_en-US" xlink:label="lab_ifrs-full_CurrentReceivablesDueFromAssociates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current receivables due from associates</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentReceivablesDueFromAssociates" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentReceivablesDueFromAssociates"/>
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    <link:label id="lab_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate_e4a619a5-e917-454f-a5e2-d00a1bb87f4a_terseLabel_en-US" xlink:label="lab_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non deductible share based payment expenses</link:label>
    <link:label id="lab_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate_label_en-US" xlink:label="lab_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of Share based Payment expenses, non-deductible, reconciliation of effective tax rate</link:label>
    <link:label id="lab_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of Share based Payment expenses, non-deductible</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:to="lab_ptv_RateOfShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NetDeferredTaxAssetsNotRecognised_f94fcb6f-7e91-44f4-aa4a-f04352296ac3_terseLabel_en-US" xlink:label="lab_ptv_NetDeferredTaxAssetsNotRecognised" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets (liabilities), net, not recognized</link:label>
    <link:label id="lab_ptv_NetDeferredTaxAssetsNotRecognised_d216def2-f001-416f-9ab2-f49e5eaf5716_totalLabel_en-US" xlink:label="lab_ptv_NetDeferredTaxAssetsNotRecognised" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_ptv_NetDeferredTaxAssetsNotRecognised_label_en-US" xlink:label="lab_ptv_NetDeferredTaxAssetsNotRecognised" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net deferred tax assets, not recognised</link:label>
    <link:label id="lab_ptv_NetDeferredTaxAssetsNotRecognised_documentation_en-US" xlink:label="lab_ptv_NetDeferredTaxAssetsNotRecognised" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net deferred tax assets, not recognised</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NetDeferredTaxAssetsNotRecognised" xlink:href="ptv-20221231.xsd#ptv_NetDeferredTaxAssetsNotRecognised"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NetDeferredTaxAssetsNotRecognised" xlink:to="lab_ptv_NetDeferredTaxAssetsNotRecognised" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_Security12bTitle_c175c959-1566-44db-b176-1f5c5c9e27be_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_label_en-US" xlink:label="lab_dei_Security12bTitle" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_Security12bTitle"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle" xlink:to="lab_dei_Security12bTitle" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock_069fe455-cb5b-46fd-a84c-b0664ff29fd1_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of weighted average exercise prices for options granted</link:label>
    <link:label id="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Weighted Average Exercise Prices for Options Granted [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Weighted Average Exercise Prices for Options Granted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock" xlink:to="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsGrantedTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PayrollTaxes_f3689838-fb65-4335-a595-abbfeb73ccc3_terseLabel_en-US" xlink:label="lab_ptv_PayrollTaxes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payroll taxes</link:label>
    <link:label id="lab_ptv_PayrollTaxes_label_en-US" xlink:label="lab_ptv_PayrollTaxes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payroll Taxes</link:label>
    <link:label id="lab_ptv_PayrollTaxes_documentation_en-US" xlink:label="lab_ptv_PayrollTaxes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payroll Taxes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PayrollTaxes" xlink:href="ptv-20221231.xsd#ptv_PayrollTaxes"/>
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    <link:label id="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss_8c4fdfea-ccc4-4c23-886a-82ae8b39b042_negatedTerseLabel_en-US" xlink:label="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognised share of losses of associates, other comprehensive loss</link:label>
    <link:label id="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss_66faae37-7641-4dcb-8e1d-4559d393b4af_terseLabel_en-US" xlink:label="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognised share of losses of associates, other comprehensive loss</link:label>
    <link:label id="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss_label_en-US" xlink:label="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognised Share Of Losses Of Associates, Other Comprehensive Loss</link:label>
    <link:label id="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss_documentation_en-US" xlink:label="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unrecognised Share Of Losses Of Associates, Other Comprehensive Loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss" xlink:href="ptv-20221231.xsd#ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss" xlink:to="lab_ptv_UnrecognisedShareOfLossesOfAssociatesOtherComprehensiveLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinanceLeaseReceivables_5c37c92a-6726-4eb4-a7e8-6cb748a0edd8_totalLabel_en-US" xlink:label="lab_ifrs-full_FinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Lease Receivable</link:label>
    <link:label id="lab_ifrs-full_FinanceLeaseReceivables_label_en-US" xlink:label="lab_ifrs-full_FinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceLeaseReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceLeaseReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinanceLeaseReceivables" xlink:to="lab_ifrs-full_FinanceLeaseReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryNotesPayableAbstract_b022060f-2a27-4771-a2dd-b9ada3097684_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryNotesPayableAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Notes Payable [Abstract]</link:label>
    <link:label id="lab_ptv_SubsidiaryNotesPayableAbstract_label_en-US" xlink:label="lab_ptv_SubsidiaryNotesPayableAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Notes Payable [Abstract]</link:label>
    <link:label id="lab_ptv_SubsidiaryNotesPayableAbstract_documentation_en-US" xlink:label="lab_ptv_SubsidiaryNotesPayableAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Notes Payable [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryNotesPayableAbstract" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryNotesPayableAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryNotesPayableAbstract" xlink:to="lab_ptv_SubsidiaryNotesPayableAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory_b45f26ed-b27c-458a-9454-a5b5596814ea_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling Interest</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of non-controlling interests [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfNoncontrollingInterestsExplanatory"/>
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    <link:label id="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsMultiplier_42a2eaf9-1aa4-4492-9f65-4726035da86b_terseLabel_en-US" xlink:label="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsMultiplier" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Calculation of number of securities called by warrants or rights, multiplier</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsMultiplier" xlink:href="ptv-20221231.xsd#ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsMultiplier"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsMultiplier" xlink:to="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsMultiplier" xlink:type="arc" order="1"/>
    <link:label id="lab_stpr_MA_f9995480-bbae-4ae2-8d18-3b7abfe119d9_terseLabel_en-US" xlink:label="lab_stpr_MA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">MASSACHUSETTS</link:label>
    <link:label id="lab_stpr_MA_label_en-US" xlink:label="lab_stpr_MA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">MASSACHUSETTS</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_MA" xlink:href="https://xbrl.sec.gov/stpr/2022/stpr-2022.xsd#stpr_MA"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_MA" xlink:to="lab_stpr_MA" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_IssuanceOfConvertibleNotesMember_a1766ae4-2ac5-42b3-95bd-93fa8a375a6f_terseLabel_en-US" xlink:label="lab_ptv_IssuanceOfConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of convertible notes</link:label>
    <link:label id="lab_ptv_IssuanceOfConvertibleNotesMember_label_en-US" xlink:label="lab_ptv_IssuanceOfConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance Of Convertible Notes [Member]</link:label>
    <link:label id="lab_ptv_IssuanceOfConvertibleNotesMember_documentation_en-US" xlink:label="lab_ptv_IssuanceOfConvertibleNotesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance Of Convertible Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_IssuanceOfConvertibleNotesMember" xlink:href="ptv-20221231.xsd#ptv_IssuanceOfConvertibleNotesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_IssuanceOfConvertibleNotesMember" xlink:to="lab_ptv_IssuanceOfConvertibleNotesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities_89c3b602-944e-424e-b132-455ac3dd7964_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other inflows (outflows) of cash, classified as financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:to="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable_4abbebe9-9612-4258-8985-d76fb7767d16_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average remaining contractual life of options excisable (in years)</link:label>
    <link:label id="lab_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable_label_en-US" xlink:label="lab_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average remaining contractual life of options excisable</link:label>
    <link:label id="lab_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable_documentation_en-US" xlink:label="lab_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average remaining contractual life of options excisable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable" xlink:to="lab_ptv_WeightedAverageRemainingContractualLifeOfOptionsExcisable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_StatementOfCashFlowsTable_137edca1-b55d-4f1d-96ae-4dad3e2a100a_terseLabel_en-US" xlink:label="lab_ptv_StatementOfCashFlowsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement Of Cash Flows [Table]</link:label>
    <link:label id="lab_ptv_StatementOfCashFlowsTable_label_en-US" xlink:label="lab_ptv_StatementOfCashFlowsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement Of Cash Flows [Table]</link:label>
    <link:label id="lab_ptv_StatementOfCashFlowsTable_documentation_en-US" xlink:label="lab_ptv_StatementOfCashFlowsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement Of Cash Flows [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_StatementOfCashFlowsTable" xlink:href="ptv-20221231.xsd#ptv_StatementOfCashFlowsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_StatementOfCashFlowsTable" xlink:to="lab_ptv_StatementOfCashFlowsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LiquidityRiskLineItems_4117697b-16bf-40fb-b457-89784409fbf9_terseLabel_en-US" xlink:label="lab_ptv_LiquidityRiskLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liquidity Risk [Line Items]</link:label>
    <link:label id="lab_ptv_LiquidityRiskLineItems_label_en-US" xlink:label="lab_ptv_LiquidityRiskLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liquidity Risk [Line Items]</link:label>
    <link:label id="lab_ptv_LiquidityRiskLineItems_documentation_en-US" xlink:label="lab_ptv_LiquidityRiskLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liquidity Risk</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LiquidityRiskLineItems" xlink:href="ptv-20221231.xsd#ptv_LiquidityRiskLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LiquidityRiskLineItems" xlink:to="lab_ptv_LiquidityRiskLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember_8db93b15-3264-4d7a-bd9f-8a107d5274d2_terseLabel_en-US" xlink:label="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All levels of fair value hierarchy</link:label>
    <link:label id="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember_label_en-US" xlink:label="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">All levels of fair value hierarchy [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AllLevelsOfFairValueHierarchyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:to="lab_ifrs-full_AllLevelsOfFairValueHierarchyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCountry_a6c9e7d4-b833-42f4-9f77-f0d37ee9f2e3_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCountry" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Country</link:label>
    <link:label id="lab_dei_EntityAddressCountry_label_en-US" xlink:label="lab_dei_EntityAddressCountry" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Country</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressCountry"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCountry" xlink:to="lab_dei_EntityAddressCountry" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts_36f8def4-2d62-45e8-9a90-5494597e00f6_verboseLabel_en-US" xlink:label="lab_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(loss) on foreign currency exchange</link:label>
    <link:label id="lab_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts_label_en-US" xlink:label="lab_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain Loss on foreign currency exchange in finance costs</link:label>
    <link:label id="lab_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts_documentation_en-US" xlink:label="lab_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain Loss on foreign currency exchange in finance costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts" xlink:href="ptv-20221231.xsd#ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts" xlink:to="lab_ptv_GainLossOnForeignCurrencyExchangeInFinanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_VorMember_43c6488a-2c43-4b8b-b6e5-eef3f81d5561_verboseLabel_en-US" xlink:label="lab_ptv_VorMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vor Biopharma Inc.</link:label>
    <link:label id="lab_ptv_VorMember_287fd564-eaab-4ac7-a46f-2f835f69b144_terseLabel_en-US" xlink:label="lab_ptv_VorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vor</link:label>
    <link:label id="lab_ptv_VorMember_label_en-US" xlink:label="lab_ptv_VorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vor [Member]</link:label>
    <link:label id="lab_ptv_VorMember_documentation_en-US" xlink:label="lab_ptv_VorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vor</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_VorMember" xlink:href="ptv-20221231.xsd#ptv_VorMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_VorMember" xlink:to="lab_ptv_VorMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NotImpairedMember_f8e632a8-3130-42c9-990c-198021e06c6c_terseLabel_en-US" xlink:label="lab_ptv_NotImpairedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not impaired</link:label>
    <link:label id="lab_ptv_NotImpairedMember_label_en-US" xlink:label="lab_ptv_NotImpairedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not impaired [Member]</link:label>
    <link:label id="lab_ptv_NotImpairedMember_documentation_en-US" xlink:label="lab_ptv_NotImpairedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not impaired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NotImpairedMember" xlink:href="ptv-20221231.xsd#ptv_NotImpairedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NotImpairedMember" xlink:to="lab_ptv_NotImpairedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory_e66cbb43-1370-485c-b0e2-06c1e32376b2_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of maturity analysis of finance lease payments receivable</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of maturity analysis of finance lease payments receivable [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory" xlink:to="lab_ifrs-full_DisclosureOfMaturityAnalysisOfFinanceLeasePaymentsReceivableExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries_0aad3cc6-2616-40f1-abd2-b3ef4fcfc1bd_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation of subsidiary</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through change in equity of subsidiaries, equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest_5ad590c4-5aaf-4e4c-82ba-b24678cdf176_terseLabel_en-US" xlink:label="lab_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance before allocation of share in associate loss to long-term interest</link:label>
    <link:label id="lab_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest_label_en-US" xlink:label="lab_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Assets At Fair Value Through Profit Or Loss before allocation to long-term interest</link:label>
    <link:label id="lab_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest_documentation_en-US" xlink:label="lab_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Assets At Fair Value Through Profit Or Loss before allocation to long-term interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest" xlink:href="ptv-20221231.xsd#ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest" xlink:to="lab_ptv_FinancialAssetsAtFairValueThroughProfitOrLossBeforeAllocationToLongTermInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory_fe1023a0-5d46-41fa-95dc-3125c44186a8_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Liabilities</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for financial liabilities [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialLiabilitiesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentLiabilities_8335abfa-4996-4bc7-ad0d-c19d498f594e_totalLabel_en-US" xlink:label="lab_ifrs-full_CurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentLiabilities_4b11640a-5a17-46c6-86d7-a6c2a66b2b5d_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentLiabilities" xlink:to="lab_ifrs-full_CurrentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinancialAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:to="lab_ifrs-full_DisclosureOfFinancialAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays_52e12228-e3c6-4839-8c5b-44a75f54a75a_terseLabel_en-US" xlink:label="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Calculation of number of securities called by warrants or rights, number of trading days</link:label>
    <link:label id="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays_label_en-US" xlink:label="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right, Calculation Of Number of Securities Called by Warrants or Rights, Number Of Trading Days</link:label>
    <link:label id="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays_documentation_en-US" xlink:label="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Class of Warrant or Right, Calculation Of Number of Securities Called by Warrants or Rights, Number Of Trading Days</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays" xlink:href="ptv-20221231.xsd#ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays" xlink:to="lab_ptv_ClassOfWarrantOrRightCalculationOfNumberOfSecuritiesCalledByWarrantsOrRightsNumberOfTradingDays" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_GrossAmountMember_a0dff25f-2f62-4368-9fba-7360460ff892_terseLabel_en-US" xlink:label="lab_ptv_GrossAmountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross Amount</link:label>
    <link:label id="lab_ptv_GrossAmountMember_label_en-US" xlink:label="lab_ptv_GrossAmountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross Amount [Member]</link:label>
    <link:label id="lab_ptv_GrossAmountMember_documentation_en-US" xlink:label="lab_ptv_GrossAmountMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gross Amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_GrossAmountMember" xlink:href="ptv-20221231.xsd#ptv_GrossAmountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_GrossAmountMember" xlink:to="lab_ptv_GrossAmountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DebtDiscountRateMeasurementInputMember_4c6d3796-a0cf-4ae0-8071-4b26d4f7589e_terseLabel_en-US" xlink:label="lab_ptv_DebtDiscountRateMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Discount Rate</link:label>
    <link:label id="lab_ptv_DebtDiscountRateMeasurementInputMember_label_en-US" xlink:label="lab_ptv_DebtDiscountRateMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Discount Rate, Measurement Input [Member]</link:label>
    <link:label id="lab_ptv_DebtDiscountRateMeasurementInputMember_documentation_en-US" xlink:label="lab_ptv_DebtDiscountRateMeasurementInputMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt Discount Rate, Measurement Input</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DebtDiscountRateMeasurementInputMember" xlink:href="ptv-20221231.xsd#ptv_DebtDiscountRateMeasurementInputMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DebtDiscountRateMeasurementInputMember" xlink:to="lab_ptv_DebtDiscountRateMeasurementInputMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_f4a8c060-2efb-4c41-aea2-438851e4baa3_terseLabel_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Translation reserve</link:label>
    <link:label id="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_label_en-US" xlink:label="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reserve of exchange differences on translation [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:to="lab_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Level2OfFairValueHierarchyMember_d6b392ce-a4e8-463a-84e0-58b9f986933b_terseLabel_en-US" xlink:label="lab_ifrs-full_Level2OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 2 of fair value hierarchy</link:label>
    <link:label id="lab_ifrs-full_Level2OfFairValueHierarchyMember_label_en-US" xlink:label="lab_ifrs-full_Level2OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 2 of fair value hierarchy [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Level2OfFairValueHierarchyMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Level2OfFairValueHierarchyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Level2OfFairValueHierarchyMember" xlink:to="lab_ifrs-full_Level2OfFairValueHierarchyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NonControllingInterestsTable_84198dc0-bbdb-47ad-8313-b1412d203c83_terseLabel_en-US" xlink:label="lab_ptv_NonControllingInterestsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests [Table]</link:label>
    <link:label id="lab_ptv_NonControllingInterestsTable_label_en-US" xlink:label="lab_ptv_NonControllingInterestsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests [Table]</link:label>
    <link:label id="lab_ptv_NonControllingInterestsTable_documentation_en-US" xlink:label="lab_ptv_NonControllingInterestsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NonControllingInterestsTable" xlink:href="ptv-20221231.xsd#ptv_NonControllingInterestsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NonControllingInterestsTable" xlink:to="lab_ptv_NonControllingInterestsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceCostExplanatory_c27360d2-e7b9-4653-8776-54a747cdd303_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance Cost, net</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceCostExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of finance cost [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceCostExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:to="lab_ifrs-full_DisclosureOfFinanceCostExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LongTermLoanAbstract_label_en-US" xlink:label="lab_ptv_LongTermLoanAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan [Abstract]</link:label>
    <link:label id="lab_ptv_LongTermLoanAbstract_documentation_en-US" xlink:label="lab_ptv_LongTermLoanAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LongTermLoanAbstract" xlink:href="ptv-20221231.xsd#ptv_LongTermLoanAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LongTermLoanAbstract" xlink:to="lab_ptv_LongTermLoanAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_5fc7409c-1d99-4aa3-9853-f077274e3def_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity settled share-based awards</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) through share-based payment transactions, equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory_88e3641e-fa2b-4a9a-afa8-f6be2f15c43e_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments in Associates</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of associates [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_KarunaVorAndAkiliMember_04b8c00c-eb80-4092-8026-2235e90f4351_terseLabel_en-US" xlink:label="lab_ptv_KarunaVorAndAkiliMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna, Vor and Akili</link:label>
    <link:label id="lab_ptv_KarunaVorAndAkiliMember_label_en-US" xlink:label="lab_ptv_KarunaVorAndAkiliMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna, Vor and Akili [Member]</link:label>
    <link:label id="lab_ptv_KarunaVorAndAkiliMember_documentation_en-US" xlink:label="lab_ptv_KarunaVorAndAkiliMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna, Vor and Akili</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_KarunaVorAndAkiliMember" xlink:href="ptv-20221231.xsd#ptv_KarunaVorAndAkiliMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_KarunaVorAndAkiliMember" xlink:to="lab_ptv_KarunaVorAndAkiliMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceAbstract_394dba38-1a2a-4be8-9963-35144a0767ad_terseLabel_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference [Abstract]</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceAbstract_label_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference [Abstract]</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceAbstract_documentation_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_MinimumLiquidationPreferenceAbstract" xlink:href="ptv-20221231.xsd#ptv_MinimumLiquidationPreferenceAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_MinimumLiquidationPreferenceAbstract" xlink:to="lab_ptv_MinimumLiquidationPreferenceAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_1cbde271-3622-4bd5-a723-22a3ccfa6e47_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment of lease liability</link:label>
    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_ebb125a0-2835-4ae5-b9a5-efb7ccedaaa4_negatedLabel_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash paid for rent - principal - financing cash flow</link:label>
    <link:label id="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments of lease liabilities, classified as financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:to="lab_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Revenue_cbc857e2-9323-4ee3-811b-8c4d0b6a5059_totalLabel_en-US" xlink:label="lab_ifrs-full_Revenue" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total revenue</link:label>
    <link:label id="lab_ifrs-full_Revenue_3c2b87e0-8b20-40cf-9e13-6bf0762d5ef3_terseLabel_en-US" xlink:label="lab_ifrs-full_Revenue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
    <link:label id="lab_ifrs-full_Revenue_12e7318f-566f-440a-87d4-0c6e2bdc9d53_verboseLabel_en-US" xlink:label="lab_ifrs-full_Revenue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total revenue</link:label>
    <link:label id="lab_ifrs-full_Revenue_label_en-US" xlink:label="lab_ifrs-full_Revenue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Revenue" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Revenue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Revenue" xlink:to="lab_ifrs-full_Revenue" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TradeAndOtherPayablesToRelatedParties_27e9c28d-481f-432f-b7b2-461b2a4517fa_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherPayablesToRelatedParties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payables to related parties</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherPayablesToRelatedParties_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherPayablesToRelatedParties" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payables to related parties</link:label>
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    <link:label id="lab_ifrs-full_DeferredTaxLiabilities_6f643163-1955-4b08-a671-510eeafafdb6_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax liability</link:label>
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    <link:label id="lab_dei_DocumentAccountingStandard_13b77f75-06d2-4c1b-8582-90a82b1641d0_terseLabel_en-US" xlink:label="lab_dei_DocumentAccountingStandard" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Accounting Standard</link:label>
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    <link:label id="lab_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock_d5aecf4c-7f1a-48e1-ab74-82444dd66d3b_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of recognized income tax expense</link:label>
    <link:label id="lab_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of recognized income tax expense [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of recognized income tax expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock" xlink:to="lab_ptv_DisclosureOfRecognizedIncomeTaxExpenseTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageOptionsForfeitedAbstract_635bb73f-c9e5-47f1-aa8b-236e38d3be13_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsForfeitedAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options forfeited [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsForfeitedAbstract_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsForfeitedAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options forfeited [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsForfeitedAbstract_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsForfeitedAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options forfeited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsForfeitedAbstract" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsForfeitedAbstract"/>
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    <link:label id="lab_ifrs-full_Liabilities_33d4e551-3f87-4b23-b6bd-573a8b16a092_totalLabel_en-US" xlink:label="lab_ifrs-full_Liabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_ifrs-full_Liabilities_56ad33f5-f711-4697-9d52-a12eac2e4336_terseLabel_en-US" xlink:label="lab_ifrs-full_Liabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_ifrs-full_Liabilities_label_en-US" xlink:label="lab_ifrs-full_Liabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Liabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Liabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Liabilities" xlink:to="lab_ifrs-full_Liabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ProfitLossAttributableToOrdinaryShareholders_2e5d7816-21d2-4e48-860e-840530b9c267_terseLabel_en-US" xlink:label="lab_ptv_ProfitLossAttributableToOrdinaryShareholders" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income/(loss) attributable to ordinary shareholders</link:label>
    <link:label id="lab_ptv_ProfitLossAttributableToOrdinaryShareholders_label_en-US" xlink:label="lab_ptv_ProfitLossAttributableToOrdinaryShareholders" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit Loss Attributable To Ordinary Shareholders</link:label>
    <link:label id="lab_ptv_ProfitLossAttributableToOrdinaryShareholders_documentation_en-US" xlink:label="lab_ptv_ProfitLossAttributableToOrdinaryShareholders" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit Loss Attributable To Ordinary Shareholders</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ProfitLossAttributableToOrdinaryShareholders" xlink:href="ptv-20221231.xsd#ptv_ProfitLossAttributableToOrdinaryShareholders"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ProfitLossAttributableToOrdinaryShareholders" xlink:to="lab_ptv_ProfitLossAttributableToOrdinaryShareholders" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock_178e427c-0e73-4c22-8b03-cf53a66dbd64_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Expenses</link:label>
    <link:label id="lab_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Operating Expense Explanatory [Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Operating Expense Explanatory</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock" xlink:to="lab_ptv_DisclosureOfOperatingExpenseExplanatoryTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdditionsToRightofuseAssets_152e2b05-222a-436f-a144-bdc588ec0dc1_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionsToRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_ifrs-full_AdditionsToRightofuseAssets_label_en-US" xlink:label="lab_ifrs-full_AdditionsToRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions to right-of-use assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsToRightofuseAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdditionsToRightofuseAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdditionsToRightofuseAssets" xlink:to="lab_ifrs-full_AdditionsToRightofuseAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LeaseLiabilitiesMember_61b714df-66f8-457e-bfd5-302c7ce3a1d7_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability</link:label>
    <link:label id="lab_ifrs-full_LeaseLiabilitiesMember_label_en-US" xlink:label="lab_ifrs-full_LeaseLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liabilities [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LeaseLiabilitiesMember" xlink:to="lab_ifrs-full_LeaseLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_FairValueOfEquityInvestment_dc0da67c-4805-436d-bbc4-6329ae716ea8_terseLabel_en-US" xlink:label="lab_ptv_FairValueOfEquityInvestment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair value of equity investment</link:label>
    <link:label id="lab_ptv_FairValueOfEquityInvestment_label_en-US" xlink:label="lab_ptv_FairValueOfEquityInvestment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Of Equity Investment</link:label>
    <link:label id="lab_ptv_FairValueOfEquityInvestment_documentation_en-US" xlink:label="lab_ptv_FairValueOfEquityInvestment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Of Equity Investment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FairValueOfEquityInvestment" xlink:href="ptv-20221231.xsd#ptv_FairValueOfEquityInvestment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FairValueOfEquityInvestment" xlink:to="lab_ptv_FairValueOfEquityInvestment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill_bee445d4-ff3a-42a5-8c01-e792c46027de_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Write-off</link:label>
    <link:label id="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment loss recognised in profit or loss, intangible assets other than goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill" xlink:to="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsOtherThanGoodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ExercisePriceRangeThreeMember_906e7527-a6a8-4f1b-80c1-47ddefe02cd0_terseLabel_en-US" xlink:label="lab_ptv_ExercisePriceRangeThreeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2.00 to 3.00</link:label>
    <link:label id="lab_ptv_ExercisePriceRangeThreeMember_label_en-US" xlink:label="lab_ptv_ExercisePriceRangeThreeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range Three [Member]</link:label>
    <link:label id="lab_ptv_ExercisePriceRangeThreeMember_documentation_en-US" xlink:label="lab_ptv_ExercisePriceRangeThreeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise Price Range Three [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ExercisePriceRangeThreeMember" xlink:href="ptv-20221231.xsd#ptv_ExercisePriceRangeThreeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ExercisePriceRangeThreeMember" xlink:to="lab_ptv_ExercisePriceRangeThreeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AccountingPoliciesLineItems_2ef2cb75-cb36-4c66-94b3-07f423a91dac_terseLabel_en-US" xlink:label="lab_ptv_AccountingPoliciesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies</link:label>
    <link:label id="lab_ptv_AccountingPoliciesLineItems_label_en-US" xlink:label="lab_ptv_AccountingPoliciesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies [Line Items]</link:label>
    <link:label id="lab_ptv_AccountingPoliciesLineItems_documentation_en-US" xlink:label="lab_ptv_AccountingPoliciesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AccountingPoliciesLineItems" xlink:href="ptv-20221231.xsd#ptv_AccountingPoliciesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AccountingPoliciesLineItems" xlink:to="lab_ptv_AccountingPoliciesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_61700ea2-fe25-46e2-8cfd-4de828dfe3a7_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by (used in) investing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeasesAbstract_96f97d7e-265d-4805-9dd2-ae4a55aa7422_terseLabel_en-US" xlink:label="lab_ptv_LeasesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases [Abstract]</link:label>
    <link:label id="lab_ptv_LeasesAbstract_label_en-US" xlink:label="lab_ptv_LeasesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases [Abstract]</link:label>
    <link:label id="lab_ptv_LeasesAbstract_documentation_en-US" xlink:label="lab_ptv_LeasesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeasesAbstract" xlink:href="ptv-20221231.xsd#ptv_LeasesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeasesAbstract" xlink:to="lab_ptv_LeasesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_FinanceLeasePaymentsReceivableLineItems_24f4c445-6d3b-4420-b2f1-629a5b6fb353_terseLabel_en-US" xlink:label="lab_ptv_FinanceLeasePaymentsReceivableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease payments receivable [Line Items]</link:label>
    <link:label id="lab_ptv_FinanceLeasePaymentsReceivableLineItems_label_en-US" xlink:label="lab_ptv_FinanceLeasePaymentsReceivableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease payments receivable [Line Items]</link:label>
    <link:label id="lab_ptv_FinanceLeasePaymentsReceivableLineItems_documentation_en-US" xlink:label="lab_ptv_FinanceLeasePaymentsReceivableLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance lease payments receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinanceLeasePaymentsReceivableLineItems" xlink:href="ptv-20221231.xsd#ptv_FinanceLeasePaymentsReceivableLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FinanceLeasePaymentsReceivableLineItems" xlink:to="lab_ptv_FinanceLeasePaymentsReceivableLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_fd79bb53-bf83-4436-a305-c8281e516d6a_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate" xlink:to="lab_dei_CurrentFiscalYearEndDate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PureTechAndThirdPartyMember_ee8fb3d6-8fc8-42a0-9503-d1fcdf7a106f_terseLabel_en-US" xlink:label="lab_ptv_PureTechAndThirdPartyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech and third-party</link:label>
    <link:label id="lab_ptv_PureTechAndThirdPartyMember_label_en-US" xlink:label="lab_ptv_PureTechAndThirdPartyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech and third-party [Member]</link:label>
    <link:label id="lab_ptv_PureTechAndThirdPartyMember_documentation_en-US" xlink:label="lab_ptv_PureTechAndThirdPartyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech and third-party</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PureTechAndThirdPartyMember" xlink:href="ptv-20221231.xsd#ptv_PureTechAndThirdPartyMember"/>
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    <link:label id="lab_ptv_NonControllingInterestsLineItems_3d1db661-d5c7-457c-8f00-a935a44ff312_terseLabel_en-US" xlink:label="lab_ptv_NonControllingInterestsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests [Line Items]</link:label>
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    <link:label id="lab_ptv_NonControllingInterestsLineItems_documentation_en-US" xlink:label="lab_ptv_NonControllingInterestsLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-Controlling Interests</link:label>
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    <link:label id="lab_ptv_CustomerFMember_2a58b17e-7d55-4aae-9fd7-be1410ef0d86_terseLabel_en-US" xlink:label="lab_ptv_CustomerFMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer F</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory_4dbd8e53-8928-4c42-9249-1ffc663fad61_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property and Equipment</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of property, plant and equipment [text block]</link:label>
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    <link:label id="lab_ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxAssetsAndLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets and liabilities [abstract]</link:label>
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    <link:label id="lab_ptv_MinimumLiquidationPreferenceTable_be9f0f07-5403-400c-a7a4-8028715741ec_terseLabel_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference [Table]</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceTable_label_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference [Table]</link:label>
    <link:label id="lab_ptv_MinimumLiquidationPreferenceTable_documentation_en-US" xlink:label="lab_ptv_MinimumLiquidationPreferenceTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Minimum liquidation preference [Table]</link:label>
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    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfWarrantLiability_ebd94009-6b08-4706-96cc-ab9a9afe7c31_terseLabel_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfWarrantLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(loss) from change in fair value of warrant liability</link:label>
    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfWarrantLiability_label_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfWarrantLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(Loss) from change in fair value of warrant liability</link:label>
    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfWarrantLiability_documentation_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfWarrantLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(Loss) from change in fair value of warrant liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_GainLossFromChangeInFairValueOfWarrantLiability" xlink:href="ptv-20221231.xsd#ptv_GainLossFromChangeInFairValueOfWarrantLiability"/>
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    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementExplanatory_bb9abe1e-790a-490a-9ffe-479005311223_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement and classification</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFairValueMeasurementExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFairValueMeasurementExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of fair value measurement [text block]</link:label>
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    <link:label id="lab_ifrs-full_CurrentLiabilitiesAbstract_70a8132c-e178-45c7-bbf8-a790ad54328e_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities</link:label>
    <link:label id="lab_ifrs-full_CurrentLiabilitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_CurrentLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current liabilities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentLiabilitiesAbstract"/>
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    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_94e59644-0f68-4a21-81ce-b2e7cd5a12b6_verboseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price, options granted (in GBP per share)</link:label>
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    <link:label id="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average exercise price of share options granted in share-based payment arrangement</link:label>
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    <link:label id="lab_ptv_PureTechManagementMember_c3b5b0a8-325c-4fd0-a955-48c705bc88c5_verboseLabel_en-US" xlink:label="lab_ptv_PureTechManagementMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Management, Inc.</link:label>
    <link:label id="lab_ptv_PureTechManagementMember_label_en-US" xlink:label="lab_ptv_PureTechManagementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Management [Member]</link:label>
    <link:label id="lab_ptv_PureTechManagementMember_documentation_en-US" xlink:label="lab_ptv_PureTechManagementMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Management</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PureTechManagementMember" xlink:href="ptv-20221231.xsd#ptv_PureTechManagementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PureTechManagementMember" xlink:to="lab_ptv_PureTechManagementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_A2017PerformanceBasedRSUMember_7094c8ea-4624-40e0-9ea5-adc5fafc5789_terseLabel_en-US" xlink:label="lab_ptv_A2017PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 performance based RSU</link:label>
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    <link:label id="lab_ptv_A2017PerformanceBasedRSUMember_documentation_en-US" xlink:label="lab_ptv_A2017PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2017 Performance Based RSU</link:label>
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    <link:label id="lab_ptv_TaxationTable_8baddb1b-2e63-4787-ab60-cf8b89cbbcad_terseLabel_en-US" xlink:label="lab_ptv_TaxationTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation [Table]</link:label>
    <link:label id="lab_ptv_TaxationTable_label_en-US" xlink:label="lab_ptv_TaxationTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation [Table]</link:label>
    <link:label id="lab_ptv_TaxationTable_documentation_en-US" xlink:label="lab_ptv_TaxationTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TaxationTable" xlink:href="ptv-20221231.xsd#ptv_TaxationTable"/>
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    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_2826f9ce-8ef2-4413-9a92-5d37b5cc980c_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property and equipment</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property, plant and equipment, classified as investing activities</link:label>
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    <link:label id="lab_ifrs-full_TopOfRangeMember_5e11bf79-7ddf-4171-8f24-adfeb74e0539_terseLabel_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Top of range</link:label>
    <link:label id="lab_ifrs-full_TopOfRangeMember_label_en-US" xlink:label="lab_ifrs-full_TopOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Top of range [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TopOfRangeMember" xlink:to="lab_ifrs-full_TopOfRangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AuditOfFinancialStatementsOfSubsidiaries_09deaaf0-9b66-4bc9-9052-8db96e0babd6_terseLabel_en-US" xlink:label="lab_ptv_AuditOfFinancialStatementsOfSubsidiaries" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Audit of the financial statements of subsidiaries</link:label>
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    <link:label id="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyAbstract_2d3847a5-1c09-4668-97d7-198425058a3b_terseLabel_en-US" xlink:label="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings/(Loss) attributable to owners of the Company [Abstract]</link:label>
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    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_a5922fae-6baa-4861-8504-e65d79d72611_terseLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwillMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets other than goodwill</link:label>
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    <link:label id="lab_ptv_MandaraSciencesLLCMember_dadd5e63-7497-430b-a533-67a9d1ed7bb5_verboseLabel_en-US" xlink:label="lab_ptv_MandaraSciencesLLCMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mandara Sciences, LLC</link:label>
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    <link:label id="lab_ptv_MandaraSciencesLLCMember_documentation_en-US" xlink:label="lab_ptv_MandaraSciencesLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Mandara Sciences LLC</link:label>
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    <link:label id="lab_ptv_DisclosureOfTotalOperatingExpenseExplanatoryTableTextBlock_37ed75af-ac2a-4f85-bda8-809e90773769_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfTotalOperatingExpenseExplanatoryTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of total operating expense</link:label>
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    <link:label id="lab_ifrs-full_CurrentContractLiabilities_af866d7c-5cd5-49e0-978b-8e9273530c67_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentContractLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred revenue &#8211; short term</link:label>
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    <link:label id="lab_ptv_DisclosureOfPayrollCostsTableTextBlock_c7d8052b-4d17-4760-aca9-4ec7331b35aa_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfPayrollCostsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of payroll costs</link:label>
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    <link:label id="lab_ifrs-full_OtherComprehensiveIncome_b7fa3380-e8eb-433c-9ac7-d72dcaa7e99b_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherComprehensiveIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total other comprehensive income/(loss)</link:label>
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    <link:label id="lab_ptv_ShareBasedPaymentArrangementsAuthorizedAmountPercentageOfCommonSharesOutstanding_5795f2fb-1113-47e2-b06c-f5edf7f977fc_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentArrangementsAuthorizedAmountPercentageOfCommonSharesOutstanding" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment arrangements, percentage of common shares outstanding</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets_356c6386-de08-415a-94b9-7c7a64e77a79_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesRecognisedInProfitOrLossFairValueMeasurementAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(loss) on investment held at fair value</link:label>
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    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfPreferredShares_631903a8-3a13-45c6-ac78-b9cdaef75c50_terseLabel_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfPreferredShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(loss) from change in fair value of preferred shares</link:label>
    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfPreferredShares_label_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfPreferredShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(Loss) from change in fair value of preferred shares</link:label>
    <link:label id="lab_ptv_GainLossFromChangeInFairValueOfPreferredShares_documentation_en-US" xlink:label="lab_ptv_GainLossFromChangeInFairValueOfPreferredShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(Loss) from change in fair value of preferred shares</link:label>
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    <link:label id="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract_de729d92-842a-4eff-8f2f-146bb4179321_terseLabel_en-US" xlink:label="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consolidated Statements of Comprehensive Income/(Loss)</link:label>
    <link:label id="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract_label_en-US" xlink:label="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statement of comprehensive income [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_StatementOfComprehensiveIncomeAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:to="lab_ifrs-full_StatementOfComprehensiveIncomeAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_39f513b8-35f3-4188-8b2b-bb6a13dd6e52_netLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets, net</link:label>
    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_f649903a-3440-45b6-8b67-12151e694737_periodStartLabel_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of period</link:label>
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    <link:label id="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill_label_en-US" xlink:label="lab_ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible assets other than goodwill</link:label>
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    <link:label id="lab_ptv_OperatingExpenseCategoryAxis_ebd4b083-4e94-4bc2-b923-061321f1deb6_terseLabel_en-US" xlink:label="lab_ptv_OperatingExpenseCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Expense Category [Axis]</link:label>
    <link:label id="lab_ptv_OperatingExpenseCategoryAxis_label_en-US" xlink:label="lab_ptv_OperatingExpenseCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Expense Category [Axis]</link:label>
    <link:label id="lab_ptv_OperatingExpenseCategoryAxis_documentation_en-US" xlink:label="lab_ptv_OperatingExpenseCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Expense Category</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OperatingExpenseCategoryAxis" xlink:href="ptv-20221231.xsd#ptv_OperatingExpenseCategoryAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_OperatingExpenseCategoryAxis" xlink:to="lab_ptv_OperatingExpenseCategoryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ExplanationOfMeasurementBasesUsedInPreparingFinancialStatements_f45eb495-caf7-466e-a628-f807356a6f25_terseLabel_en-US" xlink:label="lab_ifrs-full_ExplanationOfMeasurementBasesUsedInPreparingFinancialStatements" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Basis of Measurement</link:label>
    <link:label id="lab_ifrs-full_ExplanationOfMeasurementBasesUsedInPreparingFinancialStatements_label_en-US" xlink:label="lab_ifrs-full_ExplanationOfMeasurementBasesUsedInPreparingFinancialStatements" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Explanation of measurement bases used in preparing financial statements [text block]</link:label>
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    <link:label id="lab_ptv_ChangeInFairValue_c688f035-0a16-4763-a3d4-f377e63f7f7c_verboseLabel_en-US" xlink:label="lab_ptv_ChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Decrease in value of preferred shares measured at fair value &#8211; finance costs (income)</link:label>
    <link:label id="lab_ptv_ChangeInFairValue_65625d35-28a4-42b1-b8ee-8fcdebd064c8_terseLabel_en-US" xlink:label="lab_ptv_ChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in fair value</link:label>
    <link:label id="lab_ptv_ChangeInFairValue_label_en-US" xlink:label="lab_ptv_ChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in fair value</link:label>
    <link:label id="lab_ptv_ChangeInFairValue_documentation_en-US" xlink:label="lab_ptv_ChangeInFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ChangeInFairValue" xlink:href="ptv-20221231.xsd#ptv_ChangeInFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ChangeInFairValue" xlink:to="lab_ptv_ChangeInFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_c75cd1a9-cbdc-4160-b6ac-2304afed3bfd_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of maturity analysis of operating lease payments [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of maturity analysis of operating lease payments [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsLineItems"/>
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    <link:label id="lab_ptv_AccountingPoliciesTable_f530d77a-a9d8-4ab4-87c5-b7964e191b95_terseLabel_en-US" xlink:label="lab_ptv_AccountingPoliciesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies [Table]</link:label>
    <link:label id="lab_ptv_AccountingPoliciesTable_label_en-US" xlink:label="lab_ptv_AccountingPoliciesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies [Table]</link:label>
    <link:label id="lab_ptv_AccountingPoliciesTable_documentation_en-US" xlink:label="lab_ptv_AccountingPoliciesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AccountingPoliciesTable" xlink:href="ptv-20221231.xsd#ptv_AccountingPoliciesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AccountingPoliciesTable" xlink:to="lab_ptv_AccountingPoliciesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_IntangibleAssetsAbstract_3b3164aa-e44c-4679-8609-e12a36562c27_terseLabel_en-US" xlink:label="lab_ptv_IntangibleAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Assets [Abstract]</link:label>
    <link:label id="lab_ptv_IntangibleAssetsAbstract_label_en-US" xlink:label="lab_ptv_IntangibleAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Assets [Abstract]</link:label>
    <link:label id="lab_ptv_IntangibleAssetsAbstract_documentation_en-US" xlink:label="lab_ptv_IntangibleAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_IntangibleAssetsAbstract" xlink:href="ptv-20221231.xsd#ptv_IntangibleAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_IntangibleAssetsAbstract" xlink:to="lab_ptv_IntangibleAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory_4ae52831-dc9d-427b-babd-3b4b22ef3dcb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information about employees</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information about employees [text block]</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociates_436d107f-0946-471b-bf74-122e39d20d22_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Associates</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociates_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForInvestmentInAssociates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for investment in associates [text block]</link:label>
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    <link:label id="lab_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_02dc7539-c2a6-49f3-b444-d00d9e20fe97_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">One year to Five Years</link:label>
    <link:label id="lab_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than one year and not later than five years [member]</link:label>
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    <link:label id="lab_ptv_ShortTermNoteAbstract_b92dd58f-460d-4290-a2ab-73977b56a1fe_terseLabel_en-US" xlink:label="lab_ptv_ShortTermNoteAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Abstract]</link:label>
    <link:label id="lab_ptv_ShortTermNoteAbstract_label_en-US" xlink:label="lab_ptv_ShortTermNoteAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Abstract]</link:label>
    <link:label id="lab_ptv_ShortTermNoteAbstract_documentation_en-US" xlink:label="lab_ptv_ShortTermNoteAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShortTermNoteAbstract" xlink:href="ptv-20221231.xsd#ptv_ShortTermNoteAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShortTermNoteAbstract" xlink:to="lab_ptv_ShortTermNoteAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisedAbstract_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisedAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercised [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisedAbstract_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisedAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercised</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsExercisedAbstract" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsExercisedAbstract"/>
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    <link:label id="lab_ifrs-full_DisclosureOfLeasesExplanatory_a077bc1b-8e60-453b-9433-711d645b7621_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfLeasesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of leases [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfLeasesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfLeasesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfLeasesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfLeasesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RevenueFromRoyalties_f744823f-16bd-4ae0-b296-a826d1df6d31_terseLabel_en-US" xlink:label="lab_ifrs-full_RevenueFromRoyalties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Royalty income</link:label>
    <link:label id="lab_ifrs-full_RevenueFromRoyalties_label_en-US" xlink:label="lab_ifrs-full_RevenueFromRoyalties" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Royalty income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromRoyalties" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RevenueFromRoyalties"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RevenueFromRoyalties" xlink:to="lab_ifrs-full_RevenueFromRoyalties" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PropertyPlantAndEquipmentAbstract_label_en-US" xlink:label="lab_ifrs-full_PropertyPlantAndEquipmentAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PropertyPlantAndEquipmentAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentAbstract" xlink:to="lab_ifrs-full_PropertyPlantAndEquipmentAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ParValuePerShare_7772e45b-2c31-42fd-a5e3-80db35578cbb_terseLabel_en-US" xlink:label="lab_ifrs-full_ParValuePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Par value per share (in GBP per share)</link:label>
    <link:label id="lab_ifrs-full_ParValuePerShare_label_en-US" xlink:label="lab_ifrs-full_ParValuePerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Par value per share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParValuePerShare" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ParValuePerShare"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ParValuePerShare" xlink:to="lab_ifrs-full_ParValuePerShare" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory_a900f710-2a8b-4e1f-ac12-b7ab6bbe7595_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash and Cash Equivalents</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for restricted cash and cash equivalents [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems_f805312f-8748-4f49-ae7a-785fb1d21201_terseLabel_en-US" xlink:label="lab_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments - Fair value Measurement and Classification [Line Items]</link:label>
    <link:label id="lab_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems_label_en-US" xlink:label="lab_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments - Fair value Measurement and Classification [Line Items]</link:label>
    <link:label id="lab_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems_documentation_en-US" xlink:label="lab_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments - Fair value Measurement and Classification</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" xlink:href="ptv-20221231.xsd#ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" xlink:to="lab_ptv_FinancialInstrumentsFairValueMeasurementAndClassificationLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CapstarMember_52a96b3c-b03a-4c57-b68f-f0e8b6bb2263_terseLabel_en-US" xlink:label="lab_ptv_CapstarMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capstar</link:label>
    <link:label id="lab_ptv_CapstarMember_label_en-US" xlink:label="lab_ptv_CapstarMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capstar [Member]</link:label>
    <link:label id="lab_ptv_CapstarMember_documentation_en-US" xlink:label="lab_ptv_CapstarMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capstar</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CapstarMember" xlink:href="ptv-20221231.xsd#ptv_CapstarMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CapstarMember" xlink:to="lab_ptv_CapstarMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ConvertibleNotesTable_ee1a2dcd-b977-4a45-9e9a-af50d0986b3c_terseLabel_en-US" xlink:label="lab_ptv_ConvertibleNotesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Notes [Table]</link:label>
    <link:label id="lab_ptv_ConvertibleNotesTable_label_en-US" xlink:label="lab_ptv_ConvertibleNotesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Notes [Table]</link:label>
    <link:label id="lab_ptv_ConvertibleNotesTable_documentation_en-US" xlink:label="lab_ptv_ConvertibleNotesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Notes [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConvertibleNotesTable" xlink:href="ptv-20221231.xsd#ptv_ConvertibleNotesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ConvertibleNotesTable" xlink:to="lab_ptv_ConvertibleNotesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeaseLiabilitySubleasedArea_3b773ba9-74a8-444c-b714-881cf706fe56_terseLabel_en-US" xlink:label="lab_ptv_LeaseLiabilitySubleasedArea" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liability, subleased area (in square feet)</link:label>
    <link:label id="lab_ptv_LeaseLiabilitySubleasedArea_label_en-US" xlink:label="lab_ptv_LeaseLiabilitySubleasedArea" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability, Subleased Area</link:label>
    <link:label id="lab_ptv_LeaseLiabilitySubleasedArea_documentation_en-US" xlink:label="lab_ptv_LeaseLiabilitySubleasedArea" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability, Subleased Area</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeaseLiabilitySubleasedArea" xlink:href="ptv-20221231.xsd#ptv_LeaseLiabilitySubleasedArea"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeaseLiabilitySubleasedArea" xlink:to="lab_ptv_LeaseLiabilitySubleasedArea" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensation_6a79dce6-9285-4370-88e9-dd8476c706fe_totalLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensation" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensation_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensation" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensation" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_KeyManagementPersonnelCompensation"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensation" xlink:to="lab_ifrs-full_KeyManagementPersonnelCompensation" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember_b4a2bdad-68b2-41cf-9e21-d51f1aebf861_terseLabel_en-US" xlink:label="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated amortization</link:label>
    <link:label id="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember_label_en-US" xlink:label="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accumulated depreciation and amortisation [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:to="lab_ifrs-full_AccumulatedDepreciationAndAmortisationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_FinanceCostsAbstract_4234f237-a915-40bd-8b0f-252253878e4d_terseLabel_en-US" xlink:label="lab_ptv_FinanceCostsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance costs</link:label>
    <link:label id="lab_ptv_FinanceCostsAbstract_label_en-US" xlink:label="lab_ptv_FinanceCostsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance costs [Abstract]</link:label>
    <link:label id="lab_ptv_FinanceCostsAbstract_documentation_en-US" xlink:label="lab_ptv_FinanceCostsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinanceCostsAbstract" xlink:href="ptv-20221231.xsd#ptv_FinanceCostsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FinanceCostsAbstract" xlink:to="lab_ptv_FinanceCostsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments_5fbafe57-df2b-47d1-8821-edaa711c397a_terseLabel_en-US" xlink:label="lab_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, intercompany eliminations between parent company and reportable segments</link:label>
    <link:label id="lab_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments_label_en-US" xlink:label="lab_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, intercompany eliminations between parent company and reportable segments</link:label>
    <link:label id="lab_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments_documentation_en-US" xlink:label="lab_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, intercompany eliminations between parent company and reportable segments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments" xlink:href="ptv-20221231.xsd#ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments" xlink:to="lab_ptv_LiabilitiesIntercompanyEliminationsBetweenParentCompanyAndReportableSegments" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityCentralIndexKey_fa66061a-81a4-4846-9e49-150d88349efd_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCentralIndexKey"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_OtherAssetsAndLiabilitiesNet_bb018f20-d2a1-494a-9a55-7f625181a241_terseLabel_en-US" xlink:label="lab_ptv_OtherAssetsAndLiabilitiesNet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other assets and liabilities, net</link:label>
    <link:label id="lab_ptv_OtherAssetsAndLiabilitiesNet_label_en-US" xlink:label="lab_ptv_OtherAssetsAndLiabilitiesNet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets And Liabilities, Net</link:label>
    <link:label id="lab_ptv_OtherAssetsAndLiabilitiesNet_documentation_en-US" xlink:label="lab_ptv_OtherAssetsAndLiabilitiesNet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other Assets And Liabilities, Net</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OtherAssetsAndLiabilitiesNet" xlink:href="ptv-20221231.xsd#ptv_OtherAssetsAndLiabilitiesNet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_OtherAssetsAndLiabilitiesNet" xlink:to="lab_ptv_OtherAssetsAndLiabilitiesNet" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeasesRentalTable_e0484ab3-fd61-49bc-a29d-57b0e2be76f5_terseLabel_en-US" xlink:label="lab_ptv_LeasesRentalTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases - Rental [Table]</link:label>
    <link:label id="lab_ptv_LeasesRentalTable_label_en-US" xlink:label="lab_ptv_LeasesRentalTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases - Rental [Table]</link:label>
    <link:label id="lab_ptv_LeasesRentalTable_documentation_en-US" xlink:label="lab_ptv_LeasesRentalTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases - Rental [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeasesRentalTable" xlink:href="ptv-20221231.xsd#ptv_LeasesRentalTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeasesRentalTable" xlink:to="lab_ptv_LeasesRentalTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryTypesDomain_29862750-9f9f-4159-bc2b-69083af3bf63_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryTypesDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Types [Domain]</link:label>
    <link:label id="lab_ptv_SubsidiaryTypesDomain_label_en-US" xlink:label="lab_ptv_SubsidiaryTypesDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Types [Domain]</link:label>
    <link:label id="lab_ptv_SubsidiaryTypesDomain_documentation_en-US" xlink:label="lab_ptv_SubsidiaryTypesDomain" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Types [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryTypesDomain" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryTypesDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryTypesDomain" xlink:to="lab_ptv_SubsidiaryTypesDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialAssetsAtFairValue_4464c15e-ff93-4c73-a42f-d1a7384434ca_periodStartLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of period before allocation of associate loss to long-term interest</link:label>
    <link:label id="lab_ifrs-full_FinancialAssetsAtFairValue_fb8a8219-316a-41f2-a185-605fbf0f2bee_periodEndLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at end of period before allocation of associate loss to long-term interest</link:label>
    <link:label id="lab_ifrs-full_FinancialAssetsAtFairValue_1771612d-1ba1-413e-bbb8-60574edcb85e_verboseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets, at fair value</link:label>
    <link:label id="lab_ifrs-full_FinancialAssetsAtFairValue_6a40e85a-6385-440d-b304-f5a2320d8e90_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets</link:label>
    <link:label id="lab_ifrs-full_FinancialAssetsAtFairValue_label_en-US" xlink:label="lab_ifrs-full_FinancialAssetsAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial assets, at fair value</link:label>
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    <link:label id="lab_ifrs-full_TransfersOutOfLevel3OfFairValueHierarchyAssets_246c9990-dd1e-451e-8643-dcb3064459a6_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_TransfersOutOfLevel3OfFairValueHierarchyAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification of Vor from level 3 to level 1</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_4ace811d-d91f-40c1-84cd-65c8ff516ea3_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expected terms (in years)</link:label>
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    <link:label id="lab_dei_EntityDomain_65133963-b1eb-48d0-8134-3188ab01df2c_terseLabel_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_label_en-US" xlink:label="lab_dei_EntityDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity [Domain]</link:label>
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    <link:label id="lab_dei_CityAreaCode_ba0359fb-4634-41f1-9c80-77ae46eb4677_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_label_en-US" xlink:label="lab_dei_CityAreaCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CityAreaCode"/>
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    <link:label id="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue_11ba01c7-0faa-475f-84aa-b5851df28ff4_terseLabel_en-US" xlink:label="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combination, additional shares to be received at no additional cost, fair value</link:label>
    <link:label id="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue_label_en-US" xlink:label="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Additional Shares To Be Received At No Additional Cost, Fair Value</link:label>
    <link:label id="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue_documentation_en-US" xlink:label="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Additional Shares To Be Received At No Additional Cost, Fair Value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" xlink:href="ptv-20221231.xsd#ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" xlink:to="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis_a01429ab-aa7b-4d19-9388-1d90e1e9c15d_terseLabel_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [axis]</link:label>
    <link:label id="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis_label_en-US" xlink:label="lab_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Timing of transfer of goods or services [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TimingOfTransferOfGoodsOrServicesAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TimingOfTransferOfGoodsOrServicesAxis"/>
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    <link:label id="lab_ifrs-full_AdjustedWeightedAverageShares_8c5a93cc-9756-43c5-829b-a3d6617aff97_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustedWeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average number of ordinary shareholders at December 31 to calculate diluted earnings per share (in shares)</link:label>
    <link:label id="lab_ifrs-full_AdjustedWeightedAverageShares_label_en-US" xlink:label="lab_ifrs-full_AdjustedWeightedAverageShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average number of ordinary shares used in calculating diluted earnings per share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustedWeightedAverageShares" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustedWeightedAverageShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustedWeightedAverageShares" xlink:to="lab_ifrs-full_AdjustedWeightedAverageShares" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement_fb934ce7-e4b0-4a02-b819-b2f745ecd42d_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expired During the Year</link:label>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement_label_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options expired in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfShareOptionsExpiredInSharebasedPaymentArrangement"/>
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    <link:label id="lab_ifrs-full_AuditorsRemuneration_8a21ba4c-947a-4307-950b-fd7c24f06d49_terseLabel_en-US" xlink:label="lab_ifrs-full_AuditorsRemuneration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor's remuneration</link:label>
    <link:label id="lab_ifrs-full_AuditorsRemuneration_label_en-US" xlink:label="lab_ifrs-full_AuditorsRemuneration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor's remuneration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AuditorsRemuneration" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AuditorsRemuneration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AuditorsRemuneration" xlink:to="lab_ifrs-full_AuditorsRemuneration" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment_377f5ac6-9007-4fcb-9e64-d6652ca1db30_terseLabel_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest, first installment</link:label>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment_label_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest, first installment</link:label>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment_documentation_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest, first installment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment" xlink:href="ptv-20221231.xsd#ptv_ConsiderationForAcquiredNonControllingInterestFirstInstallment"/>
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    <link:label id="lab_ptv_OneUnnamedInvestorMember_93e6abbd-1a4c-4adc-9825-d2c2f91faff9_terseLabel_en-US" xlink:label="lab_ptv_OneUnnamedInvestorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">One Unnamed Investor</link:label>
    <link:label id="lab_ptv_OneUnnamedInvestorMember_label_en-US" xlink:label="lab_ptv_OneUnnamedInvestorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">One Unnamed Investor [Member]</link:label>
    <link:label id="lab_ptv_OneUnnamedInvestorMember_documentation_en-US" xlink:label="lab_ptv_OneUnnamedInvestorMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">One Unnamed Investor</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OneUnnamedInvestorMember" xlink:href="ptv-20221231.xsd#ptv_OneUnnamedInvestorMember"/>
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    <link:label id="lab_ifrs-full_InformationAboutCreditQualityOfNeitherPastDueNorImpairedFinancialAssets_a0844149-7f72-4c44-bca8-402405dbc9fb_terseLabel_en-US" xlink:label="lab_ifrs-full_InformationAboutCreditQualityOfNeitherPastDueNorImpairedFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Information about credit quality of neither past due nor impaired financial assets</link:label>
    <link:label id="lab_ifrs-full_InformationAboutCreditQualityOfNeitherPastDueNorImpairedFinancialAssets_label_en-US" xlink:label="lab_ifrs-full_InformationAboutCreditQualityOfNeitherPastDueNorImpairedFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Information about credit quality of neither past due nor impaired financial assets [text block]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_ae207070-569f-40a7-997a-b5ca3ed1687f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial instruments [text block]</link:label>
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    <link:label id="lab_ptv_InvestmentsHeldAtFairValueLineItems_27f064bb-0330-42c2-91f5-4f6961abc9e2_terseLabel_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value [Line Items]</link:label>
    <link:label id="lab_ptv_InvestmentsHeldAtFairValueLineItems_label_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value [Line Items]</link:label>
    <link:label id="lab_ptv_InvestmentsHeldAtFairValueLineItems_documentation_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_InvestmentsHeldAtFairValueLineItems" xlink:href="ptv-20221231.xsd#ptv_InvestmentsHeldAtFairValueLineItems"/>
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    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems_8af0dc1d-8364-41f2-941a-a4646ece9eca_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOperatingSegmentsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of operating segments [line items]</link:label>
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    <link:label id="lab_ptv_InvestmentsHeldAtFairValueMember_a04eefd1-d1a2-4745-8820-dbe2f2794701_terseLabel_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value</link:label>
    <link:label id="lab_ptv_InvestmentsHeldAtFairValueMember_label_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value [Member]</link:label>
    <link:label id="lab_ptv_InvestmentsHeldAtFairValueMember_documentation_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_InvestmentsHeldAtFairValueMember" xlink:href="ptv-20221231.xsd#ptv_InvestmentsHeldAtFairValueMember"/>
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    <link:label id="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_5ddea48c-12db-4b52-b994-121b6a68ec8b_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share price at grant date</link:label>
    <link:label id="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019_label_en-US" xlink:label="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average share price, share options granted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:to="lab_ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_fb88ec25-55eb-4a1b-a8b7-510d6a1bb6c7_terseLabel_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:label id="lab_ifrs-full_SegmentConsolidationItemsAxis_label_en-US" xlink:label="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment consolidation items [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SegmentConsolidationItemsAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SegmentConsolidationItemsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SegmentConsolidationItemsAxis" xlink:to="lab_ifrs-full_SegmentConsolidationItemsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EarningsLossPerShareTable_131e211c-c14d-4866-969e-7bd5565b753e_terseLabel_en-US" xlink:label="lab_ptv_EarningsLossPerShareTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Loss per Share [Table]</link:label>
    <link:label id="lab_ptv_EarningsLossPerShareTable_label_en-US" xlink:label="lab_ptv_EarningsLossPerShareTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Loss per Share [Table]</link:label>
    <link:label id="lab_ptv_EarningsLossPerShareTable_documentation_en-US" xlink:label="lab_ptv_EarningsLossPerShareTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Loss per Share [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EarningsLossPerShareTable" xlink:href="ptv-20221231.xsd#ptv_EarningsLossPerShareTable"/>
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    <link:label id="lab_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount_ae8eedc3-64d5-4d67-800f-600aa9ccfdfd_terseLabel_en-US" xlink:label="lab_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt instrument, payment terms, final fee trigger amount</link:label>
    <link:label id="lab_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount_label_en-US" xlink:label="lab_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt instrument, payment terms, final fee trigger amount</link:label>
    <link:label id="lab_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount_documentation_en-US" xlink:label="lab_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Debt instrument, payment terms, final fee trigger amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount" xlink:href="ptv-20221231.xsd#ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount" xlink:to="lab_ptv_DebtInstrumentPaymentTermsFinalFeeTriggerAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_c42ac6da-6407-43f3-b963-33b4df9e170b_terseLabel_en-US" xlink:label="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiaries [axis]</link:label>
    <link:label id="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_label_en-US" xlink:label="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiaries [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:to="lab_ifrs-full_SignificantInvestmentsInSubsidiariesAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_c99da76e-db3c-4922-bed1-b338abd4f58e_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, adjustment to interest rate basis</link:label>
    <link:label id="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_label_en-US" xlink:label="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, adjustment to interest rate basis</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_BorrowingsAdjustmentToInterestRateBasis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:to="lab_ifrs-full_BorrowingsAdjustmentToInterestRateBasis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AcquisitionCost_0b5995c3-ef03-462b-8bd7-1e460e9dded0_terseLabel_en-US" xlink:label="lab_ptv_AcquisitionCost" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition cost</link:label>
    <link:label id="lab_ptv_AcquisitionCost_label_en-US" xlink:label="lab_ptv_AcquisitionCost" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition cost</link:label>
    <link:label id="lab_ptv_AcquisitionCost_documentation_en-US" xlink:label="lab_ptv_AcquisitionCost" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Acquisition cost</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AcquisitionCost" xlink:href="ptv-20221231.xsd#ptv_AcquisitionCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AcquisitionCost" xlink:to="lab_ptv_AcquisitionCost" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AdjustmentsRelatedToChangeInBlendStateRate_ac42370d-2169-4b57-838d-98996ba3e29b_terseLabel_en-US" xlink:label="lab_ptv_AdjustmentsRelatedToChangeInBlendStateRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Change in blended state rate impact due to state apportionment change</link:label>
    <link:label id="lab_ptv_AdjustmentsRelatedToChangeInBlendStateRate_label_en-US" xlink:label="lab_ptv_AdjustmentsRelatedToChangeInBlendStateRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments Related To Change In Blend State Rate</link:label>
    <link:label id="lab_ptv_AdjustmentsRelatedToChangeInBlendStateRate_documentation_en-US" xlink:label="lab_ptv_AdjustmentsRelatedToChangeInBlendStateRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustment Related To Change In Blend State Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AdjustmentsRelatedToChangeInBlendStateRate" xlink:href="ptv-20221231.xsd#ptv_AdjustmentsRelatedToChangeInBlendStateRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AdjustmentsRelatedToChangeInBlendStateRate" xlink:to="lab_ptv_AdjustmentsRelatedToChangeInBlendStateRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember_f580c20c-bccd-4036-be2c-6afdcffc6c7e_terseLabel_en-US" xlink:label="lab_ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transferred at a point in time &#8211; licensing income</link:label>
    <link:label id="lab_ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember_label_en-US" xlink:label="lab_ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goods or services transferred at point in time [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:to="lab_ifrs-full_GoodsOrServicesTransferredAtPointInTimeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards_9497f681-ab64-4989-9cb6-75b1d866db9f_terseLabel_en-US" xlink:label="lab_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Partial settlement of share based liability awards and settlement of equity based RSUs (in shares)</link:label>
    <link:label id="lab_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards_label_en-US" xlink:label="lab_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Ordinary Shares Issued To Settle Share-based Payment Awards</link:label>
    <link:label id="lab_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards_documentation_en-US" xlink:label="lab_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Ordinary Shares Issued To Settle Share-based Payment Awards</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:href="ptv-20221231.xsd#ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:to="lab_ptv_NumberOfOrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PercentVotingRightsOfTheCompany_f91661fb-c952-4f7c-babe-4da8befe17f3_terseLabel_en-US" xlink:label="lab_ptv_PercentVotingRightsOfTheCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percent voting rights of the Companny</link:label>
    <link:label id="lab_ptv_PercentVotingRightsOfTheCompany_label_en-US" xlink:label="lab_ptv_PercentVotingRightsOfTheCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percent voting rights of the Company</link:label>
    <link:label id="lab_ptv_PercentVotingRightsOfTheCompany_documentation_en-US" xlink:label="lab_ptv_PercentVotingRightsOfTheCompany" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percent voting rights of the Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PercentVotingRightsOfTheCompany" xlink:href="ptv-20221231.xsd#ptv_PercentVotingRightsOfTheCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PercentVotingRightsOfTheCompany" xlink:to="lab_ptv_PercentVotingRightsOfTheCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CurrentReceivableDueFromAssociatesInterestRate_0fbac00f-6469-469c-852f-08d5e01be2f6_terseLabel_en-US" xlink:label="lab_ptv_CurrentReceivableDueFromAssociatesInterestRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current receivable due from associates, interest rate</link:label>
    <link:label id="lab_ptv_CurrentReceivableDueFromAssociatesInterestRate_label_en-US" xlink:label="lab_ptv_CurrentReceivableDueFromAssociatesInterestRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Receivable Due From Associates, Interest Rate</link:label>
    <link:label id="lab_ptv_CurrentReceivableDueFromAssociatesInterestRate_documentation_en-US" xlink:label="lab_ptv_CurrentReceivableDueFromAssociatesInterestRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current Receivable Due From Associates, Interest Rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CurrentReceivableDueFromAssociatesInterestRate" xlink:href="ptv-20221231.xsd#ptv_CurrentReceivableDueFromAssociatesInterestRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CurrentReceivableDueFromAssociatesInterestRate" xlink:to="lab_ptv_CurrentReceivableDueFromAssociatesInterestRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock_b7531005-771d-4b3c-8c14-6d02b44702de_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of income taxes recognized in comprehensive income</link:label>
    <link:label id="lab_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Income Taxes Recognized in Comprehensive Income [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Income Taxes Recognized in Comprehensive Income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock" xlink:to="lab_ptv_DisclosureOfIncomeTaxesRecognizedInComprehensiveIncomeTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentTaxExpenseIncome_a038f64e-1901-49dd-80df-60c61a00ef5a_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total current income tax expense/(benefit)</link:label>
    <link:label id="lab_ifrs-full_CurrentTaxExpenseIncome_label_en-US" xlink:label="lab_ifrs-full_CurrentTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current tax expense (income)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxExpenseIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxExpenseIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentTaxExpenseIncome" xlink:to="lab_ifrs-full_CurrentTaxExpenseIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesLineItems_51bcf8d0-1209-43ef-8486-1462a49eabe4_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Line Items]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesLineItems_label_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares [Line Items]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesLineItems_documentation_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryPreferredSharesLineItems" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryPreferredSharesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryPreferredSharesLineItems" xlink:to="lab_ptv_SubsidiaryPreferredSharesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SummaryOfEquityTableTextBlock_ebf2a18d-2700-42ff-823c-6032f9a2a774_terseLabel_en-US" xlink:label="lab_ptv_SummaryOfEquityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of equity</link:label>
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    <link:label id="lab_ptv_PaymentToAcquireShortTermNotesReceivableFromAssociate_documentation_en-US" xlink:label="lab_ptv_PaymentToAcquireShortTermNotesReceivableFromAssociate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment To Acquire Short-term Notes Receivable From Associate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PaymentToAcquireShortTermNotesReceivableFromAssociate" xlink:href="ptv-20221231.xsd#ptv_PaymentToAcquireShortTermNotesReceivableFromAssociate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PaymentToAcquireShortTermNotesReceivableFromAssociate" xlink:to="lab_ptv_PaymentToAcquireShortTermNotesReceivableFromAssociate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems_749e62a3-b0d6-436a-9785-5c9ba5f3e606_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Intangible Assets</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about intangible assets [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:to="lab_ifrs-full_DisclosureOfIntangibleAssetsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NetAssetsAttributableToShareholdersOfAssociate_8cb982e0-c626-4a91-9a47-2a4c7ec194b3_terseLabel_en-US" xlink:label="lab_ptv_NetAssetsAttributableToShareholdersOfAssociate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net assets (deficit) attributable to shareholders of Gelesis Inc.</link:label>
    <link:label id="lab_ptv_NetAssetsAttributableToShareholdersOfAssociate_label_en-US" xlink:label="lab_ptv_NetAssetsAttributableToShareholdersOfAssociate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net assets attributable to shareholders of associate</link:label>
    <link:label id="lab_ptv_NetAssetsAttributableToShareholdersOfAssociate_documentation_en-US" xlink:label="lab_ptv_NetAssetsAttributableToShareholdersOfAssociate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net assets attributable to shareholders of associate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NetAssetsAttributableToShareholdersOfAssociate" xlink:href="ptv-20221231.xsd#ptv_NetAssetsAttributableToShareholdersOfAssociate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NetAssetsAttributableToShareholdersOfAssociate" xlink:to="lab_ptv_NetAssetsAttributableToShareholdersOfAssociate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_58fba406-fd30-4d63-8a94-995299b277ee_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options granted in share-based payment arrangement (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_8f00639e-bf34-4457-a9ed-d2dc0afd9f9a_verboseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Granted (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_label_en-US" xlink:label="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of share options granted in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:to="lab_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_BusinessCombinationNumberOfSharesReceived_f82b86f1-5deb-4548-8249-2f8a2f11d59d_terseLabel_en-US" xlink:label="lab_ptv_BusinessCombinationNumberOfSharesReceived" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combination, number of shares received for additional cost (in shares)</link:label>
    <link:label id="lab_ptv_BusinessCombinationNumberOfSharesReceived_label_en-US" xlink:label="lab_ptv_BusinessCombinationNumberOfSharesReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Number Of Shares Received</link:label>
    <link:label id="lab_ptv_BusinessCombinationNumberOfSharesReceived_documentation_en-US" xlink:label="lab_ptv_BusinessCombinationNumberOfSharesReceived" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Number Of Shares Received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_BusinessCombinationNumberOfSharesReceived" xlink:href="ptv-20221231.xsd#ptv_BusinessCombinationNumberOfSharesReceived"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_BusinessCombinationNumberOfSharesReceived" xlink:to="lab_ptv_BusinessCombinationNumberOfSharesReceived" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable_fafab044-8065-4186-beb8-f81ba4999d06_terseLabel_en-US" xlink:label="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors and Senior Managers Shareholdings and Share Incentive awards [Table]</link:label>
    <link:label id="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable_label_en-US" xlink:label="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors and Senior Managers Shareholdings and Share Incentive awards [Table]</link:label>
    <link:label id="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable_documentation_en-US" xlink:label="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors and Senior Managers Shareholdings and Share Incentive awards</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" xlink:href="ptv-20221231.xsd#ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" xlink:to="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PureTechSecuritiesIICorpMember_0ee3d8e9-9ff3-4cd3-a2ef-4d89eff6403d_verboseLabel_en-US" xlink:label="lab_ptv_PureTechSecuritiesIICorpMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Securities II Corp.</link:label>
    <link:label id="lab_ptv_PureTechSecuritiesIICorpMember_label_en-US" xlink:label="lab_ptv_PureTechSecuritiesIICorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Securities II Corp. [Member]</link:label>
    <link:label id="lab_ptv_PureTechSecuritiesIICorpMember_documentation_en-US" xlink:label="lab_ptv_PureTechSecuritiesIICorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Securities II Corp.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PureTechSecuritiesIICorpMember" xlink:href="ptv-20221231.xsd#ptv_PureTechSecuritiesIICorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PureTechSecuritiesIICorpMember" xlink:to="lab_ptv_PureTechSecuritiesIICorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherFinancialAssets_df99d876-3783-4aa3-aa52-0501f132d2e4_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total other financial assets</link:label>
    <link:label id="lab_ifrs-full_OtherFinancialAssets_label_en-US" xlink:label="lab_ifrs-full_OtherFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherFinancialAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherFinancialAssets" xlink:to="lab_ifrs-full_OtherFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CorporateLoansMember_af529a9b-db4b-4db4-b4d9-0170dcd398ad_terseLabel_en-US" xlink:label="lab_ifrs-full_CorporateLoansMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Money Markets</link:label>
    <link:label id="lab_ifrs-full_CorporateLoansMember_label_en-US" xlink:label="lab_ifrs-full_CorporateLoansMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Loans to corporate entities [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CorporateLoansMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CorporateLoansMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CorporateLoansMember" xlink:to="lab_ifrs-full_CorporateLoansMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SharePriceOfInvesteeShares_f4afe5f3-c1f3-4cdb-a9c2-c2d571f1155b_verboseLabel_en-US" xlink:label="lab_ptv_SharePriceOfInvesteeShares" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share price of investee shares (in dollars per share)</link:label>
    <link:label id="lab_ptv_SharePriceOfInvesteeShares_label_en-US" xlink:label="lab_ptv_SharePriceOfInvesteeShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share price of investee shares</link:label>
    <link:label id="lab_ptv_SharePriceOfInvesteeShares_documentation_en-US" xlink:label="lab_ptv_SharePriceOfInvesteeShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share price of investee shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SharePriceOfInvesteeShares" xlink:href="ptv-20221231.xsd#ptv_SharePriceOfInvesteeShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SharePriceOfInvesteeShares" xlink:to="lab_ptv_SharePriceOfInvesteeShares" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RetainedEarnings_8ccba5a6-2480-4f52-847e-14d7bef11a44_terseLabel_en-US" xlink:label="lab_ifrs-full_RetainedEarnings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retained earnings/(accumulated deficit)</link:label>
    <link:label id="lab_ifrs-full_RetainedEarnings_label_en-US" xlink:label="lab_ifrs-full_RetainedEarnings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Retained earnings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetainedEarnings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RetainedEarnings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RetainedEarnings" xlink:to="lab_ifrs-full_RetainedEarnings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_27f37144-d319-444a-93f1-f6f98d09e1a6_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Forfeited (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_label_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of other equity instruments forfeited in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement" xlink:to="lab_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageAssumptionsAbstract_label_en-US" xlink:label="lab_ptv_WeightedAverageAssumptionsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average assumptions [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageAssumptionsAbstract_documentation_en-US" xlink:label="lab_ptv_WeightedAverageAssumptionsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment - Weighted average assumptions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageAssumptionsAbstract" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageAssumptionsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageAssumptionsAbstract" xlink:to="lab_ptv_WeightedAverageAssumptionsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards_7d36e728-11c2-4a1d-916c-09cb5ed453b2_terseLabel_en-US" xlink:label="lab_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Partial settlement of share based liability awards and settlement of equity based RSUs</link:label>
    <link:label id="lab_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards_label_en-US" xlink:label="lab_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary Shares Issued To Settle Share-based Payment Awards</link:label>
    <link:label id="lab_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards_documentation_en-US" xlink:label="lab_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary Shares Issued To Settle Share-based Payment Awards</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:href="ptv-20221231.xsd#ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:to="lab_ptv_OrdinarySharesIssuedToSettleShareBasedPaymentAwards" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeMember_ebbfbe4f-0eb2-4ee3-bd85-0dfbf2a7d788_terseLabel_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:label id="lab_srt_RangeMember_label_en-US" xlink:label="lab_srt_RangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeMember" xlink:to="lab_srt_RangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TotalBusinessOrSourcingCompanyMember_2b41e3fe-0069-4c78-961a-721a8996d10d_terseLabel_en-US" xlink:label="lab_ptv_TotalBusinessOrSourcingCompanyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Business Or Sourcing Company [Member]</link:label>
    <link:label id="lab_ptv_TotalBusinessOrSourcingCompanyMember_label_en-US" xlink:label="lab_ptv_TotalBusinessOrSourcingCompanyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Business Or Sourcing Company [Member]</link:label>
    <link:label id="lab_ptv_TotalBusinessOrSourcingCompanyMember_documentation_en-US" xlink:label="lab_ptv_TotalBusinessOrSourcingCompanyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Business Or Sourcing Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TotalBusinessOrSourcingCompanyMember" xlink:href="ptv-20221231.xsd#ptv_TotalBusinessOrSourcingCompanyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TotalBusinessOrSourcingCompanyMember" xlink:to="lab_ptv_TotalBusinessOrSourcingCompanyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CarryingAmountMember_6d70a12d-eb04-40f2-a59f-eff79c8594cd_terseLabel_en-US" xlink:label="lab_ifrs-full_CarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying Amount</link:label>
    <link:label id="lab_ifrs-full_CarryingAmountMember_label_en-US" xlink:label="lab_ifrs-full_CarryingAmountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Carrying amount [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CarryingAmountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CarryingAmountMember" xlink:to="lab_ifrs-full_CarryingAmountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NumberOfSharesHeld_7d4b2462-7330-48f3-ac84-25b4944f2949_terseLabel_en-US" xlink:label="lab_ptv_NumberOfSharesHeld" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares held (in shares)</link:label>
    <link:label id="lab_ptv_NumberOfSharesHeld_label_en-US" xlink:label="lab_ptv_NumberOfSharesHeld" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Shares Held</link:label>
    <link:label id="lab_ptv_NumberOfSharesHeld_documentation_en-US" xlink:label="lab_ptv_NumberOfSharesHeld" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number Of Shares Held</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NumberOfSharesHeld" xlink:href="ptv-20221231.xsd#ptv_NumberOfSharesHeld"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NumberOfSharesHeld" xlink:to="lab_ptv_NumberOfSharesHeld" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentFinanceLeaseReceivables_764d487b-4397-47aa-8f8c-bb9c80cb88c3_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease receivable &#8211; short-term</link:label>
    <link:label id="lab_ifrs-full_CurrentFinanceLeaseReceivables_90f3cabb-d618-4ade-8a25-f105a79f835f_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term Portion of Lease Receivable</link:label>
    <link:label id="lab_ifrs-full_CurrentFinanceLeaseReceivables_label_en-US" xlink:label="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current finance lease receivables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentFinanceLeaseReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentFinanceLeaseReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentFinanceLeaseReceivables" xlink:to="lab_ifrs-full_CurrentFinanceLeaseReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfAssociatesLineItems_522a6439-6d77-4d78-b173-887625d0e630_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfAssociatesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of associates [Line Items]</link:label>
    <link:label id="lab_ptv_DisclosureOfAssociatesLineItems_label_en-US" xlink:label="lab_ptv_DisclosureOfAssociatesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of associates [Line Items]</link:label>
    <link:label id="lab_ptv_DisclosureOfAssociatesLineItems_documentation_en-US" xlink:label="lab_ptv_DisclosureOfAssociatesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of associates</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfAssociatesLineItems" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfAssociatesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfAssociatesLineItems" xlink:to="lab_ptv_DisclosureOfAssociatesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets_aa260ef1-f39d-4864-9645-d8c53a0075f7_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Prepaid expenses</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for decrease (increase) in other current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:to="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock_35ebc477-587c-4bed-a639-215ca0d75aba_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities - warrants, weighted-average assumptions</link:label>
    <link:label id="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities - Warrants, weighted-average assumptions [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of financial liabilities - Warrants, weighted-average assumptions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock" xlink:to="lab_ptv_DisclosureOfFinancialLiabilitiesWarrantsWeightedAverageAssumptionsTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterest_cfb1e71e-65bd-47df-9fdb-6707123c1916_terseLabel_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest</link:label>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterest_label_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest</link:label>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterest_documentation_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConsiderationForAcquiredNonControllingInterest" xlink:href="ptv-20221231.xsd#ptv_ConsiderationForAcquiredNonControllingInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ConsiderationForAcquiredNonControllingInterest" xlink:to="lab_ptv_ConsiderationForAcquiredNonControllingInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DepreciationRightofuseAssets_6b2f109f-a578-4253-b693-50f9ebc4bca4_negatedLabel_en-US" xlink:label="lab_ifrs-full_DepreciationRightofuseAssets" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_ifrs-full_DepreciationRightofuseAssets_49fa3435-c4a0-494e-8376-38f891b9d686_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DepreciationRightofuseAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_ifrs-full_DepreciationRightofuseAssets_label_en-US" xlink:label="lab_ifrs-full_DepreciationRightofuseAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation, right-of-use assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationRightofuseAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DepreciationRightofuseAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DepreciationRightofuseAssets" xlink:to="lab_ifrs-full_DepreciationRightofuseAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinanceIncomeCost_3fdb63d2-911f-4867-835e-fe238f9963b8_netLabel_en-US" xlink:label="lab_ifrs-full_FinanceIncomeCost" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net finance income/(costs)</link:label>
    <link:label id="lab_ifrs-full_FinanceIncomeCost_45063185-6145-40b4-8d6f-e37f7f9f62b7_totalLabel_en-US" xlink:label="lab_ifrs-full_FinanceIncomeCost" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income/(costs), net</link:label>
    <link:label id="lab_ifrs-full_FinanceIncomeCost_label_en-US" xlink:label="lab_ifrs-full_FinanceIncomeCost" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income (cost)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceIncomeCost" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceIncomeCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinanceIncomeCost" xlink:to="lab_ifrs-full_FinanceIncomeCost" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EarningsPerShareAbstract_29ca695a-0b97-426f-a21d-e08f0bdeb56b_terseLabel_en-US" xlink:label="lab_ifrs-full_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings/(loss) per share:</link:label>
    <link:label id="lab_ifrs-full_EarningsPerShareAbstract_label_en-US" xlink:label="lab_ifrs-full_EarningsPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings per share [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EarningsPerShareAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EarningsPerShareAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EarningsPerShareAbstract" xlink:to="lab_ifrs-full_EarningsPerShareAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DrJohnLaMattinaIndividuallyMember_6e170bfa-68be-4326-b2ff-aed2e0c14f29_terseLabel_en-US" xlink:label="lab_ptv_DrJohnLaMattinaIndividuallyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr John LaMattina (individually)</link:label>
    <link:label id="lab_ptv_DrJohnLaMattinaIndividuallyMember_label_en-US" xlink:label="lab_ptv_DrJohnLaMattinaIndividuallyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr John LaMattina (individually) [Member]</link:label>
    <link:label id="lab_ptv_DrJohnLaMattinaIndividuallyMember_documentation_en-US" xlink:label="lab_ptv_DrJohnLaMattinaIndividuallyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr John LaMattina (individually)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DrJohnLaMattinaIndividuallyMember" xlink:href="ptv-20221231.xsd#ptv_DrJohnLaMattinaIndividuallyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DrJohnLaMattinaIndividuallyMember" xlink:to="lab_ptv_DrJohnLaMattinaIndividuallyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory_3998975e-9e7c-4c08-8150-b1e0c5e293fa_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of range of exercise prices of outstanding share options [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansLineItems_26f6fff4-642c-4ef7-bc57-e98cc1f2cffa_terseLabel_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Line Items]</link:label>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansLineItems_label_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Line Items]</link:label>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansLineItems_documentation_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Line Items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SignificantSubsidiaryPlansLineItems" xlink:href="ptv-20221231.xsd#ptv_SignificantSubsidiaryPlansLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SignificantSubsidiaryPlansLineItems" xlink:to="lab_ptv_SignificantSubsidiaryPlansLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_StockOptionsMember_ee2d4bfd-7010-4041-9291-c435d5334280_terseLabel_en-US" xlink:label="lab_ptv_StockOptionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock options</link:label>
    <link:label id="lab_ptv_StockOptionsMember_label_en-US" xlink:label="lab_ptv_StockOptionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Options [Member]</link:label>
    <link:label id="lab_ptv_StockOptionsMember_documentation_en-US" xlink:label="lab_ptv_StockOptionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Options</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_StockOptionsMember" xlink:href="ptv-20221231.xsd#ptv_StockOptionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_StockOptionsMember" xlink:to="lab_ptv_StockOptionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract_label_en-US" xlink:label="lab_ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transactions - Key Management Personnel Compensation [Abstract]</link:label>
    <link:label id="lab_ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract_documentation_en-US" xlink:label="lab_ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transactions - Key Management Personnel Compensation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract" xlink:href="ptv-20221231.xsd#ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract" xlink:to="lab_ptv_RelatedPartyTransactionsKeyManagementPersonnelCompensationAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NoncontrollingInterests_f821e130-f60e-4d9f-8783-af7b31fddbee_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_NoncontrollingInterests_0a6bdd20-f941-4b94-8299-b5f6ef5a4f41_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_NoncontrollingInterests" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
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    <link:label id="lab_ptv_IncreaseDecreaseInReclassificationOfEquitySettledAwardsIntoLiabilityAwards_d291ba53-9ec5-4deb-8de4-80336fbb20fc_terseLabel_en-US" xlink:label="lab_ptv_IncreaseDecreaseInReclassificationOfEquitySettledAwardsIntoLiabilityAwards" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification of equity settled awards to liability awards</link:label>
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    <link:label id="lab_ptv_KarunaMember_02202f35-6634-409c-b3f3-e8a01da72733_verboseLabel_en-US" xlink:label="lab_ptv_KarunaMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna Therapeutics, Inc.</link:label>
    <link:label id="lab_ptv_KarunaMember_35bfbc8b-8a9a-4925-a65b-d693762c2106_terseLabel_en-US" xlink:label="lab_ptv_KarunaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna</link:label>
    <link:label id="lab_ptv_KarunaMember_label_en-US" xlink:label="lab_ptv_KarunaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna [Member]</link:label>
    <link:label id="lab_ptv_KarunaMember_documentation_en-US" xlink:label="lab_ptv_KarunaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_KarunaMember" xlink:href="ptv-20221231.xsd#ptv_KarunaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_KarunaMember" xlink:to="lab_ptv_KarunaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EarningsCategoryAxis_8faa1c8a-59f4-42a5-8db5-a89099ef6555_terseLabel_en-US" xlink:label="lab_ptv_EarningsCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Category Axis [Axis]</link:label>
    <link:label id="lab_ptv_EarningsCategoryAxis_label_en-US" xlink:label="lab_ptv_EarningsCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Category [Axis]</link:label>
    <link:label id="lab_ptv_EarningsCategoryAxis_documentation_en-US" xlink:label="lab_ptv_EarningsCategoryAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Category</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EarningsCategoryAxis" xlink:href="ptv-20221231.xsd#ptv_EarningsCategoryAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EarningsCategoryAxis" xlink:to="lab_ptv_EarningsCategoryAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeaseLiabilityRenewalTerm_af13ca76-2ab7-4fc1-b5b2-5eddaa3e68ef_terseLabel_en-US" xlink:label="lab_ptv_LeaseLiabilityRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liability, renewal term</link:label>
    <link:label id="lab_ptv_LeaseLiabilityRenewalTerm_label_en-US" xlink:label="lab_ptv_LeaseLiabilityRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability, Renewal Term</link:label>
    <link:label id="lab_ptv_LeaseLiabilityRenewalTerm_documentation_en-US" xlink:label="lab_ptv_LeaseLiabilityRenewalTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability, Renewal Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeaseLiabilityRenewalTerm" xlink:href="ptv-20221231.xsd#ptv_LeaseLiabilityRenewalTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeaseLiabilityRenewalTerm" xlink:to="lab_ptv_LeaseLiabilityRenewalTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromCurrentBorrowings_27caf426-12be-4b3f-9e9e-5bd0a1de821b_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromCurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receipt of PPP loan</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromCurrentBorrowings_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromCurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from current borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromCurrentBorrowings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromCurrentBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromCurrentBorrowings" xlink:to="lab_ifrs-full_ProceedsFromCurrentBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SaleOfRoyaltyInterestContingentConsideration_cc953b24-356e-4e3d-8c7e-9da224f629d0_terseLabel_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestContingentConsideration" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of royalty interest, contingent consideration (up to)</link:label>
    <link:label id="lab_ptv_SaleOfRoyaltyInterestContingentConsideration_label_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestContingentConsideration" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Royalty Interest, Contingent Consideration</link:label>
    <link:label id="lab_ptv_SaleOfRoyaltyInterestContingentConsideration_documentation_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestContingentConsideration" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Royalty Interest, Contingent Consideration</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SaleOfRoyaltyInterestContingentConsideration" xlink:href="ptv-20221231.xsd#ptv_SaleOfRoyaltyInterestContingentConsideration"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SaleOfRoyaltyInterestContingentConsideration" xlink:to="lab_ptv_SaleOfRoyaltyInterestContingentConsideration" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_66f22896-d2cb-4e1f-b621-9242913564ac_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsequent Events</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of events after reporting period [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:to="lab_ifrs-full_DisclosureOfEventsAfterReportingPeriodExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ReclassificationOfInvestmentToInvestmentInAssociate_35dc659e-7aca-46fb-877f-8a6f5e42a5cf_negatedLabel_en-US" xlink:label="lab_ptv_ReclassificationOfInvestmentToInvestmentInAssociate" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification of Akili to level 1 investment</link:label>
    <link:label id="lab_ptv_ReclassificationOfInvestmentToInvestmentInAssociate_label_en-US" xlink:label="lab_ptv_ReclassificationOfInvestmentToInvestmentInAssociate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification of investment to investment in associate</link:label>
    <link:label id="lab_ptv_ReclassificationOfInvestmentToInvestmentInAssociate_documentation_en-US" xlink:label="lab_ptv_ReclassificationOfInvestmentToInvestmentInAssociate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassification of investment to investment in associate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ReclassificationOfInvestmentToInvestmentInAssociate" xlink:href="ptv-20221231.xsd#ptv_ReclassificationOfInvestmentToInvestmentInAssociate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ReclassificationOfInvestmentToInvestmentInAssociate" xlink:to="lab_ptv_ReclassificationOfInvestmentToInvestmentInAssociate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SignificantUnobservableInputLiabilities_c891cb21-ecfe-414e-8266-959ff0dbe659_terseLabel_en-US" xlink:label="lab_ifrs-full_SignificantUnobservableInputLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average</link:label>
    <link:label id="lab_ifrs-full_SignificantUnobservableInputLiabilities_label_en-US" xlink:label="lab_ifrs-full_SignificantUnobservableInputLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant unobservable input, liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantUnobservableInputLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SignificantUnobservableInputLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SignificantUnobservableInputLiabilities" xlink:to="lab_ifrs-full_SignificantUnobservableInputLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisedTable_bfba02d2-18c2-4cc9-a398-ac84f4fd6349_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisedTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercised [Table]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisedTable_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisedTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercised [Table]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisedTable_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisedTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercised</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsExercisedTable" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsExercisedTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageOptionsExercisedTable" xlink:to="lab_ptv_WeightedAverageOptionsExercisedTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward_14e70809-2ba5-4df6-b131-5673639643ec_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment arrangement, cash settlement value</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward_label_en-US" xlink:label="lab_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Arrangement, Cash Used to Settle Award</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Arrangement, Cash Used to Settle Award</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentArrangementCashUsedToSettleAward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward" xlink:to="lab_ptv_ShareBasedPaymentArrangementCashUsedToSettleAward" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareBasedLiabiltyAwardsMember_24e63e9b-d6dd-40e1-ae73-25886db0aed2_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedLiabiltyAwardsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share based liability awards</link:label>
    <link:label id="lab_ptv_ShareBasedLiabiltyAwardsMember_label_en-US" xlink:label="lab_ptv_ShareBasedLiabiltyAwardsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share based liabilty awards [Member]</link:label>
    <link:label id="lab_ptv_ShareBasedLiabiltyAwardsMember_documentation_en-US" xlink:label="lab_ptv_ShareBasedLiabiltyAwardsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share based liabilty awards</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedLiabiltyAwardsMember" xlink:href="ptv-20221231.xsd#ptv_ShareBasedLiabiltyAwardsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedLiabiltyAwardsMember" xlink:to="lab_ptv_ShareBasedLiabiltyAwardsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_KarunaTherapeuticsIncMember_8b22b543-e967-4ea2-a52c-ec9568e2f94a_terseLabel_en-US" xlink:label="lab_ptv_KarunaTherapeuticsIncMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna Therapeutics, Inc.</link:label>
    <link:label id="lab_ptv_KarunaTherapeuticsIncMember_label_en-US" xlink:label="lab_ptv_KarunaTherapeuticsIncMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna Therapeutics, Inc. [Member]</link:label>
    <link:label id="lab_ptv_KarunaTherapeuticsIncMember_documentation_en-US" xlink:label="lab_ptv_KarunaTherapeuticsIncMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Karuna Therapeutics, Inc.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_KarunaTherapeuticsIncMember" xlink:href="ptv-20221231.xsd#ptv_KarunaTherapeuticsIncMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_KarunaTherapeuticsIncMember" xlink:to="lab_ptv_KarunaTherapeuticsIncMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_StateMember_9ab57af7-2ec1-4f7c-8954-b23c3ba9b516_terseLabel_en-US" xlink:label="lab_ptv_StateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">State</link:label>
    <link:label id="lab_ptv_StateMember_label_en-US" xlink:label="lab_ptv_StateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">State [Member]</link:label>
    <link:label id="lab_ptv_StateMember_documentation_en-US" xlink:label="lab_ptv_StateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">State</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_StateMember" xlink:href="ptv-20221231.xsd#ptv_StateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_StateMember" xlink:to="lab_ptv_StateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PerformanceObligationsMember_8ebcb385-7389-4e23-a4c2-da3a20a01b1b_terseLabel_en-US" xlink:label="lab_ifrs-full_PerformanceObligationsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance obligations [member]</link:label>
    <link:label id="lab_ifrs-full_PerformanceObligationsMember_label_en-US" xlink:label="lab_ifrs-full_PerformanceObligationsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance obligations [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PerformanceObligationsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PerformanceObligationsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PerformanceObligationsMember" xlink:to="lab_ifrs-full_PerformanceObligationsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities_7ebd9396-889f-435f-8990-b091c029c0fe_terseLabel_en-US" xlink:label="lab_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Repayment of short-term Note from associate</link:label>
    <link:label id="lab_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Receipts From Repayment Of Current Receivables Due From Associates, Classified As Investing Activities</link:label>
    <link:label id="lab_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities_documentation_en-US" xlink:label="lab_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash Receipts From Repayment Of Current Receivables Due From Associates, Classified As Investing Activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities" xlink:href="ptv-20221231.xsd#ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities" xlink:to="lab_ptv_CashReceiptsFromRepaymentOfCurrentReceivablesDueFromAssociatesClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RestrictedCashAndCashEquivalents_f39ea081-f514-4d48-adf6-0eea7743897c_verboseLabel_en-US" xlink:label="lab_ifrs-full_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other financial assets</link:label>
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    <link:label id="lab_ifrs-full_RestrictedCashAndCashEquivalents_label_en-US" xlink:label="lab_ifrs-full_RestrictedCashAndCashEquivalents" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Restricted cash and cash equivalents</link:label>
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    <link:label id="lab_ifrs-full_OperatingExpense_fd593c9e-4988-4aa0-8559-8123d4a0f603_negatedTotalLabel_en-US" xlink:label="lab_ifrs-full_OperatingExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total operating expense</link:label>
    <link:label id="lab_ifrs-full_OperatingExpense_4195fa70-b2db-40f2-bffe-45b1a29b68eb_terseLabel_en-US" xlink:label="lab_ifrs-full_OperatingExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating income/(loss)</link:label>
    <link:label id="lab_ifrs-full_OperatingExpense_17e83489-1bb0-4d63-9985-e143624256e3_totalLabel_en-US" xlink:label="lab_ifrs-full_OperatingExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating income/(loss)</link:label>
    <link:label id="lab_ifrs-full_OperatingExpense_label_en-US" xlink:label="lab_ifrs-full_OperatingExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating expense</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_e7aaf7e2-bc18-46e4-a92d-72926f6e6caf_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
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    <link:label id="lab_dei_DocumentAnnualReport_fd8dd3aa-c0c9-4cb3-a1bd-5fbccf621991_terseLabel_en-US" xlink:label="lab_dei_DocumentAnnualReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Annual Report</link:label>
    <link:label id="lab_dei_DocumentAnnualReport_label_en-US" xlink:label="lab_dei_DocumentAnnualReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Annual Report</link:label>
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    <link:label id="lab_ifrs-full_PurchaseOfTreasuryShares_3c722640-a7fb-4b4f-8bf5-74219ba704ae_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfTreasuryShares" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of Treasury stock</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfTreasuryShares_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfTreasuryShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of treasury shares</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_9111887d-57df-4cec-a07c-2cb787921270_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of disaggregation of revenue from contracts with customers [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of disaggregation of revenue from contracts with customers [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems"/>
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    <link:label id="lab_dei_LegalEntityAxis_ea42fec4-0636-4e4f-99b2-c925ef618b5d_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:label id="lab_dei_LegalEntityAxis_label_en-US" xlink:label="lab_dei_LegalEntityAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LegalEntityAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AggregatedMeasurementMember_bcf24320-88ff-4ef6-b357-e3b2c4438945_terseLabel_en-US" xlink:label="lab_ifrs-full_AggregatedMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated measurement</link:label>
    <link:label id="lab_ifrs-full_AggregatedMeasurementMember_label_en-US" xlink:label="lab_ifrs-full_AggregatedMeasurementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregated measurement [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedMeasurementMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AggregatedMeasurementMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AggregatedMeasurementMember" xlink:to="lab_ifrs-full_AggregatedMeasurementMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NumberOfAssociateCommonStockHeldAtFairValue_b5997fa0-e6ca-4af9-a349-16537aab4dcd_terseLabel_en-US" xlink:label="lab_ptv_NumberOfAssociateCommonStockHeldAtFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of associate's common stock held at fair value</link:label>
    <link:label id="lab_ptv_NumberOfAssociateCommonStockHeldAtFairValue_label_en-US" xlink:label="lab_ptv_NumberOfAssociateCommonStockHeldAtFairValue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of associate common stock held at fair value</link:label>
    <link:label id="lab_ptv_NumberOfAssociateCommonStockHeldAtFairValue_documentation_en-US" xlink:label="lab_ptv_NumberOfAssociateCommonStockHeldAtFairValue" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of associate common stock held at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NumberOfAssociateCommonStockHeldAtFairValue" xlink:href="ptv-20221231.xsd#ptv_NumberOfAssociateCommonStockHeldAtFairValue"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NumberOfAssociateCommonStockHeldAtFairValue" xlink:to="lab_ptv_NumberOfAssociateCommonStockHeldAtFairValue" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ResearchAndDevelopmentMember_9f433717-381f-4945-9f9c-b3e803aeaff2_terseLabel_en-US" xlink:label="lab_ptv_ResearchAndDevelopmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research and development</link:label>
    <link:label id="lab_ptv_ResearchAndDevelopmentMember_label_en-US" xlink:label="lab_ptv_ResearchAndDevelopmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research And Development [Member]</link:label>
    <link:label id="lab_ptv_ResearchAndDevelopmentMember_documentation_en-US" xlink:label="lab_ptv_ResearchAndDevelopmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Research And Development</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ResearchAndDevelopmentMember" xlink:href="ptv-20221231.xsd#ptv_ResearchAndDevelopmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ResearchAndDevelopmentMember" xlink:to="lab_ptv_ResearchAndDevelopmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment_cb67f348-b593-4902-9f2b-5c35c1cd4cb5_terseLabel_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest, second installment</link:label>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment_label_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest, second installment</link:label>
    <link:label id="lab_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment_documentation_en-US" xlink:label="lab_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration for acquired non-controlling interest, second installment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment" xlink:href="ptv-20221231.xsd#ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment" xlink:to="lab_ptv_ConsiderationForAcquiredNonControllingInterestSecondInstallment" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_c2c43b45-b5d1-467a-81ba-cac8edfde5f9_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of terms and conditions of share-based payment arrangement [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:to="lab_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansAbstract_5c339764-331d-46b4-a42f-a452bb0d9741_terseLabel_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Abstract]</link:label>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansAbstract_label_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans [Abstract]</link:label>
    <link:label id="lab_ptv_SignificantSubsidiaryPlansAbstract_documentation_en-US" xlink:label="lab_ptv_SignificantSubsidiaryPlansAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Significant Subsidiary Plans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SignificantSubsidiaryPlansAbstract" xlink:href="ptv-20221231.xsd#ptv_SignificantSubsidiaryPlansAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SignificantSubsidiaryPlansAbstract" xlink:to="lab_ptv_SignificantSubsidiaryPlansAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputAssets_6d59ea76-24e1-4822-acf6-cd32290d1317_verboseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets</link:label>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputAssets_label_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseInFairValueMeasurementDueToReasonablyPossibleIncreaseInUnobservableInputAssets"/>
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    <link:label id="lab_ptv_FinanceIncomecostsAbstract_66f9da12-0c81-4d88-a4d4-f8d01802cf85_terseLabel_en-US" xlink:label="lab_ptv_FinanceIncomecostsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income/(costs):</link:label>
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    <link:label id="lab_ptv_FinanceIncomecostsAbstract_documentation_en-US" xlink:label="lab_ptv_FinanceIncomecostsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income/(costs)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinanceIncomecostsAbstract" xlink:href="ptv-20221231.xsd#ptv_FinanceIncomecostsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FinanceIncomecostsAbstract" xlink:to="lab_ptv_FinanceIncomecostsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SaleOfEquityInstrumentsInOtherEntities_d2a36e28-2ac1-4d9f-a44b-95157bab739d_terseLabel_en-US" xlink:label="lab_ptv_SaleOfEquityInstrumentsInOtherEntities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of equity instruments in other entities (in shares)</link:label>
    <link:label id="lab_ptv_SaleOfEquityInstrumentsInOtherEntities_label_en-US" xlink:label="lab_ptv_SaleOfEquityInstrumentsInOtherEntities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of equity instruments in other entities</link:label>
    <link:label id="lab_ptv_SaleOfEquityInstrumentsInOtherEntities_documentation_en-US" xlink:label="lab_ptv_SaleOfEquityInstrumentsInOtherEntities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of equity instruments in other entities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SaleOfEquityInstrumentsInOtherEntities" xlink:href="ptv-20221231.xsd#ptv_SaleOfEquityInstrumentsInOtherEntities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SaleOfEquityInstrumentsInOtherEntities" xlink:to="lab_ptv_SaleOfEquityInstrumentsInOtherEntities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PerformanceObligationsSatisfiedOverTimeMember_e528f700-9a5a-4016-ad28-b916757c28c6_terseLabel_en-US" xlink:label="lab_ifrs-full_PerformanceObligationsSatisfiedOverTimeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance obligations satisfied over</link:label>
    <link:label id="lab_ifrs-full_PerformanceObligationsSatisfiedOverTimeMember_label_en-US" xlink:label="lab_ifrs-full_PerformanceObligationsSatisfiedOverTimeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance obligations satisfied over time [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PerformanceObligationsSatisfiedOverTimeMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PerformanceObligationsSatisfiedOverTimeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PerformanceObligationsSatisfiedOverTimeMember" xlink:to="lab_ifrs-full_PerformanceObligationsSatisfiedOverTimeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentTaxAssetsCurrent_4f626472-0f3f-4579-bb19-e0a5cf268b51_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentTaxAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax receivable</link:label>
    <link:label id="lab_ifrs-full_CurrentTaxAssetsCurrent_label_en-US" xlink:label="lab_ifrs-full_CurrentTaxAssetsCurrent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current tax assets, current</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxAssetsCurrent" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentTaxAssetsCurrent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentTaxAssetsCurrent" xlink:to="lab_ifrs-full_CurrentTaxAssetsCurrent" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CommitmentsAndContingenciesTable_ceb251b7-7adb-41c2-807a-44c9575e739e_terseLabel_en-US" xlink:label="lab_ptv_CommitmentsAndContingenciesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies [Table]</link:label>
    <link:label id="lab_ptv_CommitmentsAndContingenciesTable_label_en-US" xlink:label="lab_ptv_CommitmentsAndContingenciesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies [Table]</link:label>
    <link:label id="lab_ptv_CommitmentsAndContingenciesTable_documentation_en-US" xlink:label="lab_ptv_CommitmentsAndContingenciesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CommitmentsAndContingenciesTable" xlink:href="ptv-20221231.xsd#ptv_CommitmentsAndContingenciesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CommitmentsAndContingenciesTable" xlink:to="lab_ptv_CommitmentsAndContingenciesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_VedantaBiosciencesMember_7a192514-e3b6-4822-9a88-b673110f8d4b_verboseLabel_en-US" xlink:label="lab_ptv_VedantaBiosciencesMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vedanta Biosciences</link:label>
    <link:label id="lab_ptv_VedantaBiosciencesMember_91736927-64dc-4efc-b98d-f51263abc6f2_terseLabel_en-US" xlink:label="lab_ptv_VedantaBiosciencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vedanta</link:label>
    <link:label id="lab_ptv_VedantaBiosciencesMember_label_en-US" xlink:label="lab_ptv_VedantaBiosciencesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vedanta Biosciences [Member]</link:label>
    <link:label id="lab_ptv_VedantaBiosciencesMember_documentation_en-US" xlink:label="lab_ptv_VedantaBiosciencesMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vedanta Biosciences</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_VedantaBiosciencesMember" xlink:href="ptv-20221231.xsd#ptv_VedantaBiosciencesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_VedantaBiosciencesMember" xlink:to="lab_ptv_VedantaBiosciencesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentAssetsAbstract_727ceabd-5fa2-4795-a510-850428be18a0_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current assets</link:label>
    <link:label id="lab_ifrs-full_CurrentAssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_CurrentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentAssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentAssetsAbstract" xlink:to="lab_ifrs-full_CurrentAssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherReserves_ac208769-998f-4788-a62a-fa0360068215_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherReserves" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other reserve</link:label>
    <link:label id="lab_ifrs-full_OtherReserves_label_en-US" xlink:label="lab_ifrs-full_OtherReserves" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other reserves</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherReserves" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherReserves"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherReserves" xlink:to="lab_ifrs-full_OtherReserves" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock_af9d1d82-7de8-4774-839f-fab5e2bfb85f_terseLabel_en-US" xlink:label="lab_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of earnings/(loss) attributable to owners of company</link:label>
    <link:label id="lab_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock_label_en-US" xlink:label="lab_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Loss attributable to owners of company [Table Text Block]</link:label>
    <link:label id="lab_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock_documentation_en-US" xlink:label="lab_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings Loss attributable to owners of company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock" xlink:to="lab_ptv_EarningsLossAttributableToOwnersOfCompanyTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TradeAndOtherReceivablesNotImpairedAbstract_9c2bbaf0-0072-4f2c-9c0e-4335798acf73_terseLabel_en-US" xlink:label="lab_ptv_TradeAndOtherReceivablesNotImpairedAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Neither past due nor impaired [Abstract]</link:label>
    <link:label id="lab_ptv_TradeAndOtherReceivablesNotImpairedAbstract_label_en-US" xlink:label="lab_ptv_TradeAndOtherReceivablesNotImpairedAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables not impaired [Abstract]</link:label>
    <link:label id="lab_ptv_TradeAndOtherReceivablesNotImpairedAbstract_documentation_en-US" xlink:label="lab_ptv_TradeAndOtherReceivablesNotImpairedAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables not impaired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TradeAndOtherReceivablesNotImpairedAbstract" xlink:href="ptv-20221231.xsd#ptv_TradeAndOtherReceivablesNotImpairedAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TradeAndOtherReceivablesNotImpairedAbstract" xlink:to="lab_ptv_TradeAndOtherReceivablesNotImpairedAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PerformanceBasedRSUMember_5e8ab7d2-a0ad-426b-9d5a-fbbf22fdcbcc_terseLabel_en-US" xlink:label="lab_ptv_PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance based RSU</link:label>
    <link:label id="lab_ptv_PerformanceBasedRSUMember_label_en-US" xlink:label="lab_ptv_PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance based RSU [Member]</link:label>
    <link:label id="lab_ptv_PerformanceBasedRSUMember_documentation_en-US" xlink:label="lab_ptv_PerformanceBasedRSUMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance based RSU</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PerformanceBasedRSUMember" xlink:href="ptv-20221231.xsd#ptv_PerformanceBasedRSUMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PerformanceBasedRSUMember" xlink:to="lab_ptv_PerformanceBasedRSUMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LaboratoryAndManufacturingEquipmentMember_00e562f4-9b7e-4071-bdd2-b8706d599275_terseLabel_en-US" xlink:label="lab_ptv_LaboratoryAndManufacturingEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Laboratory and manufacturing equipment</link:label>
    <link:label id="lab_ptv_LaboratoryAndManufacturingEquipmentMember_label_en-US" xlink:label="lab_ptv_LaboratoryAndManufacturingEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Laboratory and Manufacturing Equipment [Member]</link:label>
    <link:label id="lab_ptv_LaboratoryAndManufacturingEquipmentMember_documentation_en-US" xlink:label="lab_ptv_LaboratoryAndManufacturingEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Laboratory and Manufacturing Equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LaboratoryAndManufacturingEquipmentMember" xlink:href="ptv-20221231.xsd#ptv_LaboratoryAndManufacturingEquipmentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LaboratoryAndManufacturingEquipmentMember" xlink:to="lab_ptv_LaboratoryAndManufacturingEquipmentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_bc43bda6-43da-4808-9fad-f7e64d04049c_verboseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">2024</link:label>
    <link:label id="lab_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_3d624450-2151-45c7-a47c-c7b4da70b90a_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">One to two years</link:label>
    <link:label id="lab_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than one year and not later than two years [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:to="lab_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_dba2b98b-eaf5-48d1-8ea8-e64c05770ffa_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leases</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for leases [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityShellCompany_01d835c9-b0ca-404d-a996-97f7c32ec420_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Shell Company</link:label>
    <link:label id="lab_dei_EntityShellCompany_label_en-US" xlink:label="lab_dei_EntityShellCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityShellCompany"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany" xlink:to="lab_dei_EntityShellCompany" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestExpenseOnBorrowings_4b9f7cc1-77c6-4a02-aa13-358f361dc2d9_negatedLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnBorrowings" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on other borrowings</link:label>
    <link:label id="lab_ifrs-full_InterestExpenseOnBorrowings_label_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseOnBorrowings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestExpenseOnBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestExpenseOnBorrowings" xlink:to="lab_ifrs-full_InterestExpenseOnBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_6f7083d8-765d-471e-91a4-f65aaf140094_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [line items]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about borrowings [line items]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:to="lab_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TradeAndOtherReceivablesNotImpairedTable_0766e1a4-ef7f-4be3-99b2-24ec89c59da1_terseLabel_en-US" xlink:label="lab_ptv_TradeAndOtherReceivablesNotImpairedTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables not impaired [Table]</link:label>
    <link:label id="lab_ptv_TradeAndOtherReceivablesNotImpairedTable_label_en-US" xlink:label="lab_ptv_TradeAndOtherReceivablesNotImpairedTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables not impaired [Table]</link:label>
    <link:label id="lab_ptv_TradeAndOtherReceivablesNotImpairedTable_documentation_en-US" xlink:label="lab_ptv_TradeAndOtherReceivablesNotImpairedTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Neither Past due or impaired [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TradeAndOtherReceivablesNotImpairedTable" xlink:href="ptv-20221231.xsd#ptv_TradeAndOtherReceivablesNotImpairedTable"/>
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    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementAbstract_label_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management [Abstract]</link:label>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementAbstract_documentation_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management</link:label>
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    <link:label id="lab_ptv_NotLaterThan10YearsMember_25e9bbe4-3dc6-427c-86a8-4d7b627ce10e_terseLabel_en-US" xlink:label="lab_ptv_NotLaterThan10YearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Within 10 years</link:label>
    <link:label id="lab_ptv_NotLaterThan10YearsMember_label_en-US" xlink:label="lab_ptv_NotLaterThan10YearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not later than 10 years [Member]</link:label>
    <link:label id="lab_ptv_NotLaterThan10YearsMember_documentation_en-US" xlink:label="lab_ptv_NotLaterThan10YearsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Not later than 10 years</link:label>
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    <link:label id="lab_ifrs-full_MiscellaneousOtherOperatingExpense_e6f2df15-c3d1-48ac-a336-bb5eaaddaf06_terseLabel_en-US" xlink:label="lab_ifrs-full_MiscellaneousOtherOperatingExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Miscellaneous other operating expense</link:label>
    <link:label id="lab_ifrs-full_MiscellaneousOtherOperatingExpense_label_en-US" xlink:label="lab_ifrs-full_MiscellaneousOtherOperatingExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Miscellaneous other operating expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MiscellaneousOtherOperatingExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_MiscellaneousOtherOperatingExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MiscellaneousOtherOperatingExpense" xlink:to="lab_ifrs-full_MiscellaneousOtherOperatingExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AuditorsRemunerationLineItems_c4ebc331-a53b-4c6f-84a3-485ad0af557f_terseLabel_en-US" xlink:label="lab_ptv_AuditorsRemunerationLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditors Remuneration [Line Items]</link:label>
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    <link:label id="lab_ptv_AuditorsRemunerationLineItems_documentation_en-US" xlink:label="lab_ptv_AuditorsRemunerationLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditors Remuneration [Line Items]</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfAssetsMember_cea1579a-e3ea-4eac-98fd-276e1d5f05a9_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfAssetsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_ifrs-full_ClassesOfAssetsMember_label_en-US" xlink:label="lab_ifrs-full_ClassesOfAssetsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfAssetsMember" xlink:to="lab_ifrs-full_ClassesOfAssetsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AkiliInteractiveLabsMember_2e82a785-e315-4182-bedb-6c3bd2c66ec9_verboseLabel_en-US" xlink:label="lab_ptv_AkiliInteractiveLabsMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Akili Interactive Labs, Inc.</link:label>
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    <link:label id="lab_ptv_AkiliInteractiveLabsMember_documentation_en-US" xlink:label="lab_ptv_AkiliInteractiveLabsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Akili Interactive Labs</link:label>
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    <link:label id="lab_dei_DocumentPeriodEndDate_7f8d4d7d-a7c8-4621-a968-a1d76eec5107_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentPeriodEndDate"/>
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    <link:label id="lab_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock_08597134-3578-420c-aacb-65084cf6118f_terseLabel_en-US" xlink:label="lab_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiary preferred shares, minimum liquidation preference</link:label>
    <link:label id="lab_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock_label_en-US" xlink:label="lab_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of Minimum liquidation preference [Table Text Block]</link:label>
    <link:label id="lab_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock_documentation_en-US" xlink:label="lab_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of Minimum liquidation preference</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock" xlink:to="lab_ptv_SummaryOfMinimumLiquidationPreferenceTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SummaryOfInvestmentsInAssociatesTableTextBlock_edef3655-bba9-4165-a2c0-200a65c8b6d0_terseLabel_en-US" xlink:label="lab_ptv_SummaryOfInvestmentsInAssociatesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of investments in associates</link:label>
    <link:label id="lab_ptv_SummaryOfInvestmentsInAssociatesTableTextBlock_label_en-US" xlink:label="lab_ptv_SummaryOfInvestmentsInAssociatesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of Investments in Associates [Table Text Block]</link:label>
    <link:label id="lab_ptv_SummaryOfInvestmentsInAssociatesTableTextBlock_documentation_en-US" xlink:label="lab_ptv_SummaryOfInvestmentsInAssociatesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of Investments in Associates</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SummaryOfInvestmentsInAssociatesTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_SummaryOfInvestmentsInAssociatesTableTextBlock"/>
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    <link:label id="lab_ptv_TotalIncomeTaxTypeMember_3ca52f9d-008b-4736-abb5-9577433edab2_terseLabel_en-US" xlink:label="lab_ptv_TotalIncomeTaxTypeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Income Tax Type</link:label>
    <link:label id="lab_ptv_TotalIncomeTaxTypeMember_label_en-US" xlink:label="lab_ptv_TotalIncomeTaxTypeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Income Tax Type [Member]</link:label>
    <link:label id="lab_ptv_TotalIncomeTaxTypeMember_documentation_en-US" xlink:label="lab_ptv_TotalIncomeTaxTypeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Income Tax Type</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TotalIncomeTaxTypeMember" xlink:href="ptv-20221231.xsd#ptv_TotalIncomeTaxTypeMember"/>
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    <link:label id="lab_ptv_PureTechLYT100Member_89137cf4-7acc-4784-9bbc-6f6ed546103c_verboseLabel_en-US" xlink:label="lab_ptv_PureTechLYT100Member" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech LYT-100</link:label>
    <link:label id="lab_ptv_PureTechLYT100Member_label_en-US" xlink:label="lab_ptv_PureTechLYT100Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech LYT - 100 [Member]</link:label>
    <link:label id="lab_ptv_PureTechLYT100Member_documentation_en-US" xlink:label="lab_ptv_PureTechLYT100Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech LYT - 100</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory_1a873d96-5f14-4ad2-a9ee-f120b623c00d_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Employee Benefits</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for employee benefits [text block]</link:label>
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    <link:label id="lab_ptv_CustomerDMember_a9c6b4b7-6f8c-4093-9cc4-5d0950251d2f_terseLabel_en-US" xlink:label="lab_ptv_CustomerDMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer D</link:label>
    <link:label id="lab_ptv_CustomerDMember_label_en-US" xlink:label="lab_ptv_CustomerDMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer D [Member]</link:label>
    <link:label id="lab_ptv_CustomerDMember_documentation_en-US" xlink:label="lab_ptv_CustomerDMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customer D</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CustomerDMember" xlink:href="ptv-20221231.xsd#ptv_CustomerDMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CustomerDMember" xlink:to="lab_ptv_CustomerDMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityAndLiabilities_232a3d1d-6e91-4b81-a85f-fdb1ea78ef64_totalLabel_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total equity and liabilities</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAndLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAndLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAndLiabilities" xlink:to="lab_ifrs-full_EquityAndLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TreasurySharesMember_a644045e-f321-4531-b554-40a5e63e2ee1_terseLabel_en-US" xlink:label="lab_ifrs-full_TreasurySharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury Shares</link:label>
    <link:label id="lab_ifrs-full_TreasurySharesMember_label_en-US" xlink:label="lab_ifrs-full_TreasurySharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury shares [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasurySharesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TreasurySharesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TreasurySharesMember" xlink:to="lab_ifrs-full_TreasurySharesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SaleOfRoyaltyInterestConsiderationExpected_36674bd3-f684-45dc-90cc-8e0102d830b8_terseLabel_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestConsiderationExpected" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of royalty interest, expected consideration</link:label>
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    <link:label id="lab_ptv_SaleOfRoyaltyInterestConsiderationExpected_documentation_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestConsiderationExpected" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Royalty Interest, Consideration, Expected</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SaleOfRoyaltyInterestConsiderationExpected" xlink:href="ptv-20221231.xsd#ptv_SaleOfRoyaltyInterestConsiderationExpected"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SaleOfRoyaltyInterestConsiderationExpected" xlink:to="lab_ptv_SaleOfRoyaltyInterestConsiderationExpected" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareBasedPaymentLineItems_2e218b26-22ac-48ca-a611-0e27b1b1d346_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment [Line Items]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentLineItems_label_en-US" xlink:label="lab_ptv_ShareBasedPaymentLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment [Line Items]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentLineItems_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentLineItems" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedPaymentLineItems" xlink:to="lab_ptv_ShareBasedPaymentLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesMember_2977a6dd-fd70-4bf2-a081-a565559ddd7d_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities, class</link:label>
    <link:label id="lab_ifrs-full_FinancialLiabilitiesMember_label_en-US" xlink:label="lab_ifrs-full_FinancialLiabilitiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities, class [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinancialLiabilitiesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember" xlink:to="lab_ifrs-full_FinancialLiabilitiesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_26a0f3c8-e96d-4324-8e79-7f8587fddd9f_periodStartLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding (Non-vested), beginning of year (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_4ade8d86-a4ab-4cb7-9f87-60126f765189_periodEndLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Outstanding (Non-vested), end of year (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_0cf16212-df02-4bca-92b6-131fab2c5db3_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of RSUs held (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_label_en-US" xlink:label="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of other equity instruments outstanding in share-based payment arrangement</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:to="lab_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AccruedInterestContractual_5906650b-5a9b-43c6-a8fe-49bef09582ff_terseLabel_en-US" xlink:label="lab_ptv_AccruedInterestContractual" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued interest &#8211; contractual</link:label>
    <link:label id="lab_ptv_AccruedInterestContractual_label_en-US" xlink:label="lab_ptv_AccruedInterestContractual" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued interest - contractual</link:label>
    <link:label id="lab_ptv_AccruedInterestContractual_documentation_en-US" xlink:label="lab_ptv_AccruedInterestContractual" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued interest - contractual</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AccruedInterestContractual" xlink:href="ptv-20221231.xsd#ptv_AccruedInterestContractual"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AccruedInterestContractual" xlink:to="lab_ptv_AccruedInterestContractual" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_16bafd31-e4b1-4d06-8b30-a595e8a66c9a_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total parent equity</link:label>
    <link:label id="lab_ifrs-full_EquityAttributableToOwnersOfParentMember_label_en-US" xlink:label="lab_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity attributable to owners of parent [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:to="lab_ifrs-full_EquityAttributableToOwnersOfParentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentGovernmentGrants_14a7dc65-aaee-4de6-8107-7ebdb40191bb_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred revenue</link:label>
    <link:label id="lab_ifrs-full_CurrentGovernmentGrants_label_en-US" xlink:label="lab_ifrs-full_CurrentGovernmentGrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current government grants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentGovernmentGrants" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentGovernmentGrants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentGovernmentGrants" xlink:to="lab_ifrs-full_CurrentGovernmentGrants" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_FinanceIncomecostsSubsidiaryPreferredShares_bd170f64-2470-4dd1-98ba-70aae45c306a_terseLabel_en-US" xlink:label="lab_ptv_FinanceIncomecostsSubsidiaryPreferredShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income/(costs) &#8211; subsidiary preferred shares</link:label>
    <link:label id="lab_ptv_FinanceIncomecostsSubsidiaryPreferredShares_label_en-US" xlink:label="lab_ptv_FinanceIncomecostsSubsidiaryPreferredShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income/(costs) - subsidiary preferred shares</link:label>
    <link:label id="lab_ptv_FinanceIncomecostsSubsidiaryPreferredShares_documentation_en-US" xlink:label="lab_ptv_FinanceIncomecostsSubsidiaryPreferredShares" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income/(costs) - subsidiary preferred shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinanceIncomecostsSubsidiaryPreferredShares" xlink:href="ptv-20221231.xsd#ptv_FinanceIncomecostsSubsidiaryPreferredShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FinanceIncomecostsSubsidiaryPreferredShares" xlink:to="lab_ptv_FinanceIncomecostsSubsidiaryPreferredShares" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_ef45ca28-9f1a-48ca-9c66-7fbddf8f89e1_totalLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities_label_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from (used in) financing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:to="lab_ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments_f00c77c9-b77c-4471-8308-7f1c9884f0e2_terseLabel_en-US" xlink:label="lab_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on change in fair value of equity investments</link:label>
    <link:label id="lab_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments_label_en-US" xlink:label="lab_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) On Change In Fair Value Of Equity Investments</link:label>
    <link:label id="lab_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments_documentation_en-US" xlink:label="lab_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (Losses) On Change In Fair Value Of Equity Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments" xlink:href="ptv-20221231.xsd#ptv_GainsLossesOnChangeInFairValueOfEquityInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments" xlink:to="lab_ptv_GainsLossesOnChangeInFairValueOfEquityInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToNoncontrollingInterests_335134ea-3ed7-4388-a6d5-9727af799b2b_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_ifrs-full_ProfitLossAttributableToNoncontrollingInterests_label_en-US" xlink:label="lab_ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss), attributable to non-controlling interests</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:to="lab_ifrs-full_ProfitLossAttributableToNoncontrollingInterests" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SeriesC2PreferredMember_adb33cfb-c1cd-4ccd-a5d1-b63dc4a2b30a_terseLabel_en-US" xlink:label="lab_ptv_SeriesC2PreferredMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series C-2 preferred</link:label>
    <link:label id="lab_ptv_SeriesC2PreferredMember_label_en-US" xlink:label="lab_ptv_SeriesC2PreferredMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series C-2 Preferred [Member]</link:label>
    <link:label id="lab_ptv_SeriesC2PreferredMember_documentation_en-US" xlink:label="lab_ptv_SeriesC2PreferredMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series C-2 Preferred</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SeriesC2PreferredMember" xlink:href="ptv-20221231.xsd#ptv_SeriesC2PreferredMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SeriesC2PreferredMember" xlink:to="lab_ptv_SeriesC2PreferredMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_InterestExpenseOnLeaseLiabilities_a007111a-6b57-479b-8278-f456b10dd80b_negatedLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on lease liability</link:label>
    <link:label id="lab_ifrs-full_InterestExpenseOnLeaseLiabilities_b9f2342a-242b-469b-a729-d7bcca605db3_terseLabel_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_ifrs-full_InterestExpenseOnLeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense on lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_InterestExpenseOnLeaseLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:to="lab_ifrs-full_InterestExpenseOnLeaseLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DilutedMember_aa649b01-391a-4fdc-9e05-22aa9a71bb0d_terseLabel_en-US" xlink:label="lab_ptv_DilutedMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Diluted</link:label>
    <link:label id="lab_ptv_DilutedMember_label_en-US" xlink:label="lab_ptv_DilutedMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Diluted [Member]</link:label>
    <link:label id="lab_ptv_DilutedMember_documentation_en-US" xlink:label="lab_ptv_DilutedMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Diluted</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DilutedMember" xlink:href="ptv-20221231.xsd#ptv_DilutedMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DilutedMember" xlink:to="lab_ptv_DilutedMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisableAbstract_b296cd53-9425-4186-bf2f-8c707a1b904b_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisableAbstract_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable [Abstract]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisableAbstract_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsExercisableAbstract" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsExercisableAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageOptionsExercisableAbstract" xlink:to="lab_ptv_WeightedAverageOptionsExercisableAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfInformationOfEmployeesTable_ace5aa9b-7a22-4947-9825-ca2bb5470ae1_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfInformationOfEmployeesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information of employees [Table]</link:label>
    <link:label id="lab_ptv_DisclosureOfInformationOfEmployeesTable_label_en-US" xlink:label="lab_ptv_DisclosureOfInformationOfEmployeesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information of employees [Table]</link:label>
    <link:label id="lab_ptv_DisclosureOfInformationOfEmployeesTable_documentation_en-US" xlink:label="lab_ptv_DisclosureOfInformationOfEmployeesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of information of employees [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfInformationOfEmployeesTable" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfInformationOfEmployeesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfInformationOfEmployeesTable" xlink:to="lab_ptv_DisclosureOfInformationOfEmployeesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_BorrowingsAccruedInterest_c1328f2e-0360-4d96-91f4-71c49f54610f_terseLabel_en-US" xlink:label="lab_ptv_BorrowingsAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued interest</link:label>
    <link:label id="lab_ptv_BorrowingsAccruedInterest_label_en-US" xlink:label="lab_ptv_BorrowingsAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, Accrued Interest</link:label>
    <link:label id="lab_ptv_BorrowingsAccruedInterest_documentation_en-US" xlink:label="lab_ptv_BorrowingsAccruedInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, Accrued Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_BorrowingsAccruedInterest" xlink:href="ptv-20221231.xsd#ptv_BorrowingsAccruedInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_BorrowingsAccruedInterest" xlink:to="lab_ptv_BorrowingsAccruedInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_97b12679-d943-44af-a248-f0892bdd6a3c_terseLabel_en-US" xlink:label="lab_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Useful life measured as period of time, property, plant and equipment</link:label>
    <link:label id="lab_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Useful life measured as period of time, property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" xlink:to="lab_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased_8b0779ff-5687-4c82-8dce-fc13959926bf_terseLabel_en-US" xlink:label="lab_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value of ahares authorized to be repurchased</link:label>
    <link:label id="lab_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased_label_en-US" xlink:label="lab_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Repurchase Program, Shares Authorized to be Repurchased</link:label>
    <link:label id="lab_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased_documentation_en-US" xlink:label="lab_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Stock Repurchase Program, Shares Authorized to be Repurchased</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased" xlink:href="ptv-20221231.xsd#ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased" xlink:to="lab_ptv_StockRepurchaseProgramSharesAuthorizedToBeRepurchased" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfCustomersMember_c8c35b36-393a-4275-badd-fe234a78b591_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfCustomersMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of customers</link:label>
    <link:label id="lab_ifrs-full_TypesOfCustomersMember_label_en-US" xlink:label="lab_ifrs-full_TypesOfCustomersMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Types of customers [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfCustomersMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TypesOfCustomersMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfCustomersMember" xlink:to="lab_ifrs-full_TypesOfCustomersMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TotalOperatingExpenseMember_bbeb6df8-766d-4d42-a162-e314b6b817b4_terseLabel_en-US" xlink:label="lab_ptv_TotalOperatingExpenseMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
    <link:label id="lab_ptv_TotalOperatingExpenseMember_label_en-US" xlink:label="lab_ptv_TotalOperatingExpenseMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Operating Expense [Member]</link:label>
    <link:label id="lab_ptv_TotalOperatingExpenseMember_documentation_en-US" xlink:label="lab_ptv_TotalOperatingExpenseMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Operating Expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TotalOperatingExpenseMember" xlink:href="ptv-20221231.xsd#ptv_TotalOperatingExpenseMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TotalOperatingExpenseMember" xlink:to="lab_ptv_TotalOperatingExpenseMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AdjustmentsForFinanceCostsIncome_bd660961-221d-43bc-9ec5-18699fb02c60_terseLabel_en-US" xlink:label="lab_ptv_AdjustmentsForFinanceCostsIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance (income)/costs, net</link:label>
    <link:label id="lab_ptv_AdjustmentsForFinanceCostsIncome_label_en-US" xlink:label="lab_ptv_AdjustmentsForFinanceCostsIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments For Finance Costs (Income)</link:label>
    <link:label id="lab_ptv_AdjustmentsForFinanceCostsIncome_documentation_en-US" xlink:label="lab_ptv_AdjustmentsForFinanceCostsIncome" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments For Finance Costs (Income)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AdjustmentsForFinanceCostsIncome" xlink:href="ptv-20221231.xsd#ptv_AdjustmentsForFinanceCostsIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AdjustmentsForFinanceCostsIncome" xlink:to="lab_ptv_AdjustmentsForFinanceCostsIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_a16eb4fc-738e-47ea-a12e-e3f6f7bcdd6e_terseLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term employee benefits</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation, short-term employee benefits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:to="lab_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ConvertibleNotesRollForward_06901e00-b3a0-47a0-9b15-68264178c9c2_terseLabel_en-US" xlink:label="lab_ptv_ConvertibleNotesRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Notes [Roll Forward]</link:label>
    <link:label id="lab_ptv_ConvertibleNotesRollForward_label_en-US" xlink:label="lab_ptv_ConvertibleNotesRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Notes [Roll Forward]</link:label>
    <link:label id="lab_ptv_ConvertibleNotesRollForward_documentation_en-US" xlink:label="lab_ptv_ConvertibleNotesRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConvertibleNotesRollForward" xlink:href="ptv-20221231.xsd#ptv_ConvertibleNotesRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ConvertibleNotesRollForward" xlink:to="lab_ptv_ConvertibleNotesRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_MeasurementAxis_87d0072e-bdab-4f69-88b2-55ac02e9c6cd_terseLabel_en-US" xlink:label="lab_ifrs-full_MeasurementAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Measurement [axis]</link:label>
    <link:label id="lab_ifrs-full_MeasurementAxis_label_en-US" xlink:label="lab_ifrs-full_MeasurementAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Measurement [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MeasurementAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_MeasurementAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MeasurementAxis" xlink:to="lab_ifrs-full_MeasurementAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets_d94c9bb7-0d30-40f6-830a-95989a478f1b_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(loss) on disposal of assets</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on disposals of non-current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets" xlink:to="lab_ifrs-full_GainsLossesOnDisposalsOfNoncurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_OtherPayablesLiabilitySettledShareBasedAwards_5166d9e8-17ee-41c4-9ecd-25e25acce7de_terseLabel_en-US" xlink:label="lab_ptv_OtherPayablesLiabilitySettledShareBasedAwards" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability settled share based awards</link:label>
    <link:label id="lab_ptv_OtherPayablesLiabilitySettledShareBasedAwards_label_en-US" xlink:label="lab_ptv_OtherPayablesLiabilitySettledShareBasedAwards" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other payables, liability settled share based awards</link:label>
    <link:label id="lab_ptv_OtherPayablesLiabilitySettledShareBasedAwards_documentation_en-US" xlink:label="lab_ptv_OtherPayablesLiabilitySettledShareBasedAwards" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other payables, liability settled share based awards</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OtherPayablesLiabilitySettledShareBasedAwards" xlink:href="ptv-20221231.xsd#ptv_OtherPayablesLiabilitySettledShareBasedAwards"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_OtherPayablesLiabilitySettledShareBasedAwards" xlink:to="lab_ptv_OtherPayablesLiabilitySettledShareBasedAwards" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressCityOrTown_c4f66875-1bf2-4398-8614-484dc34bc155_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressCityOrTown"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown" xlink:to="lab_dei_EntityAddressCityOrTown" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities_75b9bcca-a837-4dcb-8440-fa5925af3f41_terseLabel_en-US" xlink:label="lab_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payments in respect of developmental milestones, dependent on events outside control of company, but reasonably possible to occur</link:label>
    <link:label id="lab_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities_label_en-US" xlink:label="lab_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Estimated financial effect of contingent liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EstimatedFinancialEffectOfContingentLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:to="lab_ifrs-full_EstimatedFinancialEffectOfContingentLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LeaseholdImprovementsMember_90d6b7fc-f1f8-404f-ac2e-bace8670fba3_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseholdImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leasehold improvements</link:label>
    <link:label id="lab_ifrs-full_LeaseholdImprovementsMember_label_en-US" xlink:label="lab_ifrs-full_LeaseholdImprovementsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Leasehold improvements [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseholdImprovementsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LeaseholdImprovementsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LeaseholdImprovementsMember" xlink:to="lab_ifrs-full_LeaseholdImprovementsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ExpiringAxis_d3fa12f8-11f1-4e35-b836-7eb64d7509ea_terseLabel_en-US" xlink:label="lab_ptv_ExpiringAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expiring [Axis]</link:label>
    <link:label id="lab_ptv_ExpiringAxis_label_en-US" xlink:label="lab_ptv_ExpiringAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expiring [Axis]</link:label>
    <link:label id="lab_ptv_ExpiringAxis_documentation_en-US" xlink:label="lab_ptv_ExpiringAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Expiring</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ExpiringAxis" xlink:href="ptv-20221231.xsd#ptv_ExpiringAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ExpiringAxis" xlink:to="lab_ptv_ExpiringAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ConvertibleInstrumentsDiscountRate_1da0d99a-7c1f-493c-afc2-c763d929957e_terseLabel_en-US" xlink:label="lab_ptv_ConvertibleInstrumentsDiscountRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible instruments, discount rate</link:label>
    <link:label id="lab_ptv_ConvertibleInstrumentsDiscountRate_label_en-US" xlink:label="lab_ptv_ConvertibleInstrumentsDiscountRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible instruments, discount rate</link:label>
    <link:label id="lab_ptv_ConvertibleInstrumentsDiscountRate_documentation_en-US" xlink:label="lab_ptv_ConvertibleInstrumentsDiscountRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible instruments, discount rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConvertibleInstrumentsDiscountRate" xlink:href="ptv-20221231.xsd#ptv_ConvertibleInstrumentsDiscountRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ConvertibleInstrumentsDiscountRate" xlink:to="lab_ptv_ConvertibleInstrumentsDiscountRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DerivativeAssetBackstopAgreementMember_bd234c3a-9744-4bca-bf45-2e930e82e1e6_terseLabel_en-US" xlink:label="lab_ptv_DerivativeAssetBackstopAgreementMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Asset, Backstop Agreement</link:label>
    <link:label id="lab_ptv_DerivativeAssetBackstopAgreementMember_label_en-US" xlink:label="lab_ptv_DerivativeAssetBackstopAgreementMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Derivative Asset, Backstop Agreement [Member]</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForFairValueGainsLosses_fddfdf73-7c02-4d04-8c88-2c0b6e77cebd_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForFairValueGainsLosses" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based compensation expense</link:label>
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    <link:label id="lab_ptv_ScheduleOfPropertyEquipmentNetTableTextBlock_a6ac47b2-52b9-487e-923e-301c8bd45769_terseLabel_en-US" xlink:label="lab_ptv_ScheduleOfPropertyEquipmentNetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of property &amp; equipment, net</link:label>
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    <link:label id="lab_ptv_FinancialInvestmentsNumberOfEarnoutSharesReceivedFromSPACExchange_88df7728-6ef7-49e5-ae89-12c40aa13fe7_terseLabel_en-US" xlink:label="lab_ptv_FinancialInvestmentsNumberOfEarnoutSharesReceivedFromSPACExchange" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of earnout shares received from SPAC exchange (in shares)</link:label>
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    <link:label id="lab_ptv_PureTechHealthMember_a8edcf61-769b-40d3-8f95-603c92fab552_verboseLabel_en-US" xlink:label="lab_ptv_PureTechHealthMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PureTech Health LLC</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory_30ec590e-45cd-42f2-8326-6a99b6ba685f_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of maturity analysis of operating lease payments</link:label>
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    <link:label id="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesTableTextBlock_717e2f94-d75c-48bd-bd23-3247034d67e3_terseLabel_en-US" xlink:label="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in the value of subsidiary preferred shares</link:label>
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    <link:label id="lab_ifrs-full_CurrentPrepaidExpenses_label_en-US" xlink:label="lab_ifrs-full_CurrentPrepaidExpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current prepaid expenses</link:label>
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    <link:label id="lab_ifrs-full_CurrentLeaseLiabilities_14c15270-87ae-491d-a98e-a10931d798b0_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liability, current</link:label>
    <link:label id="lab_ifrs-full_CurrentLeaseLiabilities_67058089-b761-4478-a3d4-c692bddbc002_verboseLabel_en-US" xlink:label="lab_ifrs-full_CurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term Portion of Lease Liability</link:label>
    <link:label id="lab_ifrs-full_CurrentLeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_CurrentLeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current lease liabilities</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughDisposalOfSubsidiary_bedebda1-0762-4a40-91c6-61b017baaaff_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughDisposalOfSubsidiary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deconsolidation of subsidiary</link:label>
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    <link:label id="lab_ptv_IncreaseDecreaseThroughVestingOfShareBasedAwardsAndNetShareExerciseEquity_42c4552e-7a6f-46c4-a468-373af46354d2_terseLabel_en-US" xlink:label="lab_ptv_IncreaseDecreaseThroughVestingOfShareBasedAwardsAndNetShareExerciseEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting of share-based awards and net share exercise</link:label>
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    <link:label id="lab_ptv_IncreaseDecreaseThroughVestingOfShareBasedAwardsAndNetShareExerciseEquity_documentation_en-US" xlink:label="lab_ptv_IncreaseDecreaseThroughVestingOfShareBasedAwardsAndNetShareExerciseEquity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase Decrease through vesting of share based awards and net share exercise, equity</link:label>
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    <link:label id="lab_ifrs-full_EntitysTotalForAssociatesMember_e7528ea7-20ce-4a6f-8946-790527ab3e60_terseLabel_en-US" xlink:label="lab_ifrs-full_EntitysTotalForAssociatesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for associates</link:label>
    <link:label id="lab_ifrs-full_EntitysTotalForAssociatesMember_label_en-US" xlink:label="lab_ifrs-full_EntitysTotalForAssociatesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity's total for associates [member]</link:label>
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    <link:label id="lab_ptv_LiquidityRiskTable_fba4fccf-7b20-4fdd-acff-c17b123a690f_terseLabel_en-US" xlink:label="lab_ptv_LiquidityRiskTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liquidity Risk [Table]</link:label>
    <link:label id="lab_ptv_LiquidityRiskTable_label_en-US" xlink:label="lab_ptv_LiquidityRiskTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liquidity Risk [Table]</link:label>
    <link:label id="lab_ptv_LiquidityRiskTable_documentation_en-US" xlink:label="lab_ptv_LiquidityRiskTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liquidity Risk [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LiquidityRiskTable" xlink:href="ptv-20221231.xsd#ptv_LiquidityRiskTable"/>
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    <link:label id="lab_ifrs-full_NoncurrentAssetsAbstract_19535a76-56fb-4e7c-9a2d-d195bc78b520_terseLabel_en-US" xlink:label="lab_ifrs-full_NoncurrentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current assets</link:label>
    <link:label id="lab_ifrs-full_NoncurrentAssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_NoncurrentAssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-current assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NoncurrentAssetsAbstract"/>
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    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementTable_90b4f159-b166-4cd6-b8d4-b48e5591241b_terseLabel_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management [Table]</link:label>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementTable_label_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management [Table]</link:label>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementTable_documentation_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CapitalAndFinancialRiskManagementTable" xlink:href="ptv-20221231.xsd#ptv_CapitalAndFinancialRiskManagementTable"/>
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    <link:label id="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties_00987e19-9220-433d-bb2e-fe5d8cb141a6_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables due from related parties</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receivables due from related parties</link:label>
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    <link:label id="lab_ifrs-full_ComputerEquipmentMember_fbc40b50-1935-4a22-a532-165d40adf0a2_terseLabel_en-US" xlink:label="lab_ifrs-full_ComputerEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Computer equipment and software</link:label>
    <link:label id="lab_ifrs-full_ComputerEquipmentMember_label_en-US" xlink:label="lab_ifrs-full_ComputerEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Computer equipment [member]</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems_c5a4d147-70b3-484f-a7b6-36975ee25c78_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of significant unobservable inputs used in fair value measurement of liabilities [line items]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSignificantUnobservableInputsUsedInFairValueMeasurementOfLiabilitiesLineItems"/>
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    <link:label id="lab_ifrs-full_NumberOfSharesIssuedAndFullyPaid_a3a90bda-6d6a-45dc-a406-c35df31aecb7_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesIssuedAndFullyPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued and fully paid (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesIssuedAndFullyPaid_label_en-US" xlink:label="lab_ifrs-full_NumberOfSharesIssuedAndFullyPaid" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued and fully paid</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory_af56abc7-906b-4a08-9148-3d70fbea27f9_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other operating expense</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of other operating expense [text block]</link:label>
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    <link:label id="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsMember_807f991a-73cb-4c56-ad17-ffdc8c6f6a80_terseLabel_en-US" xlink:label="lab_ifrs-full_RangesOfExercisePricesForOutstandingShareOptionsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ranges of exercise prices for outstanding share options</link:label>
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    <link:label id="lab_ptv_TradeAndOtherPayablesMember_848429aa-7fed-4df2-9e8f-90674e1b8b03_terseLabel_en-US" xlink:label="lab_ptv_TradeAndOtherPayablesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other payables</link:label>
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    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_99545885-778b-4602-af65-9fc792430f1f_terseLabel_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_label_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="lab_srt_RepurchaseAgreementCounterpartyNameDomain" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_3669fa7a-36b3-49c4-b2eb-490dcede9e6b_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment of investment in associate</link:label>
    <link:label id="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_a8593ff0-f9b3-4f9e-a0fa-248d5f45f831_terseLabel_en-US" xlink:label="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment of investment in associate</link:label>
    <link:label id="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_503e52e2-d3de-4dc1-9e90-b69106dcf92e_negatedLabel_en-US" xlink:label="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment</link:label>
    <link:label id="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss_label_en-US" xlink:label="lab_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment loss recognised in profit or loss</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLoss" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLoss"/>
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    <link:label id="lab_srt_DirectorMember_fe1196bb-5bf4-4d68-ab0b-3b5ce4d6240c_terseLabel_en-US" xlink:label="lab_srt_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Director</link:label>
    <link:label id="lab_srt_DirectorMember_label_en-US" xlink:label="lab_srt_DirectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Director [Member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_DirectorMember"/>
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    <link:label id="lab_ptv_ShareBasedPaymentExpenseTableTextBlock_9a754ceb-2994-49df-8199-4bae15fec30a_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of share-based payment expense as reflected in the Consolidated Statement of Income/(Loss)</link:label>
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    <link:label id="lab_ptv_ShareBasedPaymentExpenseTableTextBlock_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentExpenseTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payment Expense Table</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentExpenseTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentExpenseTableTextBlock"/>
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    <link:label id="lab_ifrs-full_Level1OfFairValueHierarchyMember_46758fe9-625a-489d-b48e-2065e5f4f72c_terseLabel_en-US" xlink:label="lab_ifrs-full_Level1OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 1 of fair value hierarchy</link:label>
    <link:label id="lab_ifrs-full_Level1OfFairValueHierarchyMember_label_en-US" xlink:label="lab_ifrs-full_Level1OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 1 of fair value hierarchy [member]</link:label>
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    <link:label id="lab_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate_d7767c94-8e2d-4df8-adba-27649a96b49b_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non deductible share based payment expenses</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate_label_en-US" xlink:label="lab_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share based Payment expenses, non-deductible, reconciliation of effective tax rate</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share based Payment expenses, non-deductible, reconciliation of effective tax rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:to="lab_ptv_ShareBasedPaymentExpensesNonDeductibleReconciliationOfEffectiveTaxRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis_9644a50f-0294-42f3-b9b1-9306817eaeed_terseLabel_en-US" xlink:label="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Loss Carryforwards, Expiration Periods [Axis]</link:label>
    <link:label id="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis_label_en-US" xlink:label="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Loss Carryforwards, Expiration Periods [Axis]</link:label>
    <link:label id="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis_documentation_en-US" xlink:label="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Loss Carryforwards, Expiration Periods</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" xlink:href="ptv-20221231.xsd#ptv_OperatingLossCarryforwardsExpirationPeriodsAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" xlink:to="lab_ptv_OperatingLossCarryforwardsExpirationPeriodsAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_VestingOfRestrictedStockUnits_f0490d36-8966-4523-8cde-e36fe0677390_negatedTerseLabel_en-US" xlink:label="lab_ptv_VestingOfRestrictedStockUnits" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting of restricted stock units and net share exercise</link:label>
    <link:label id="lab_ptv_VestingOfRestrictedStockUnits_label_en-US" xlink:label="lab_ptv_VestingOfRestrictedStockUnits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting of restricted stock units</link:label>
    <link:label id="lab_ptv_VestingOfRestrictedStockUnits_documentation_en-US" xlink:label="lab_ptv_VestingOfRestrictedStockUnits" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vesting of restricted stock units</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_VestingOfRestrictedStockUnits" xlink:href="ptv-20221231.xsd#ptv_VestingOfRestrictedStockUnits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_VestingOfRestrictedStockUnits" xlink:to="lab_ptv_VestingOfRestrictedStockUnits" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions_80c90cf5-1448-4743-a3c2-6bc4c3a88337_terseLabel_en-US" xlink:label="lab_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liability for share based awards</link:label>
    <link:label id="lab_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions_label_en-US" xlink:label="lab_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non current Liabilities From Share based Payment Transactions</link:label>
    <link:label id="lab_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions_documentation_en-US" xlink:label="lab_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non current Liabilities From Share based Payment Transactions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:href="ptv-20221231.xsd#ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:to="lab_ptv_NonCurrentLiabilitiesFromShareBasedPaymentTransactions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_d742f55f-6575-4cb8-b38e-9fa3b5cd754d_terseLabel_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based payment expense</link:label>
    <link:label id="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_label_en-US" xlink:label="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Key management personnel compensation, share-based payment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:to="lab_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock_71448bed-4bad-42ad-ad21-95759cfd7732_terseLabel_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Going Concern</link:label>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock_label_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description Of Accounting Policy For Going Concern [Policy Text Block]</link:label>
    <link:label id="lab_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock_documentation_en-US" xlink:label="lab_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description Of Accounting Policy For Going Concern</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock" xlink:href="ptv-20221231.xsd#ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock" xlink:to="lab_ptv_DescriptionOfAccountingPolicyForGoingConcernPolicyTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NumberOfSharesIssued_aa25e8b0-45ae-4d2d-954e-27327fab8df2_periodStartLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesIssued" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance number of shares outstanding (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesIssued_7dad6820-4251-4e1c-b71b-2deb03f0f9c8_periodEndLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesIssued" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance number of shares outstanding (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesIssued_f3446c44-9644-4f60-bf89-3627211e17c6_terseLabel_en-US" xlink:label="lab_ifrs-full_NumberOfSharesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued (in shares)</link:label>
    <link:label id="lab_ifrs-full_NumberOfSharesIssued_label_en-US" xlink:label="lab_ifrs-full_NumberOfSharesIssued" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NumberOfSharesIssued" xlink:to="lab_ifrs-full_NumberOfSharesIssued" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AccountingPoliciesPropertyAndEquipmentTable_c60f6302-56b8-4831-b67d-08e7548730e2_terseLabel_en-US" xlink:label="lab_ptv_AccountingPoliciesPropertyAndEquipmentTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies - Property and Equipment [Table]</link:label>
    <link:label id="lab_ptv_AccountingPoliciesPropertyAndEquipmentTable_label_en-US" xlink:label="lab_ptv_AccountingPoliciesPropertyAndEquipmentTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies - Property and Equipment [Table]</link:label>
    <link:label id="lab_ptv_AccountingPoliciesPropertyAndEquipmentTable_documentation_en-US" xlink:label="lab_ptv_AccountingPoliciesPropertyAndEquipmentTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies - Property and Equipment [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AccountingPoliciesPropertyAndEquipmentTable" xlink:href="ptv-20221231.xsd#ptv_AccountingPoliciesPropertyAndEquipmentTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AccountingPoliciesPropertyAndEquipmentTable" xlink:to="lab_ptv_AccountingPoliciesPropertyAndEquipmentTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ScheduleOfIntangibleAssetsNetTableTextBlock_1b23bf41-1c8b-491c-86e8-274a68e3686d_terseLabel_en-US" xlink:label="lab_ptv_ScheduleOfIntangibleAssetsNetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of intangible assets, net</link:label>
    <link:label id="lab_ptv_ScheduleOfIntangibleAssetsNetTableTextBlock_label_en-US" xlink:label="lab_ptv_ScheduleOfIntangibleAssetsNetTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Intangible assets net [Table Text Block]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_ScheduleOfIntangibleAssetsNetTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_ScheduleOfIntangibleAssetsNetTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ScheduleOfIntangibleAssetsNetTableTextBlock" xlink:to="lab_ptv_ScheduleOfIntangibleAssetsNetTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RevenueTable_62c55d2e-493d-4c7b-b50f-542af15c1924_terseLabel_en-US" xlink:label="lab_ptv_RevenueTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue [Table]</link:label>
    <link:label id="lab_ptv_RevenueTable_label_en-US" xlink:label="lab_ptv_RevenueTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue [Table]</link:label>
    <link:label id="lab_ptv_RevenueTable_documentation_en-US" xlink:label="lab_ptv_RevenueTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Revenue</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RevenueTable" xlink:href="ptv-20221231.xsd#ptv_RevenueTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RevenueTable" xlink:to="lab_ptv_RevenueTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_MarketPWERMAndHybridAllocationMember_5d6f55f9-8d7e-43d2-b763-9429bfa6e62f_terseLabel_en-US" xlink:label="lab_ptv_MarketPWERMAndHybridAllocationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">PWERM based on pro forma backsolve approach that leverages a Monte Carlo simulation</link:label>
    <link:label id="lab_ptv_MarketPWERMAndHybridAllocationMember_label_en-US" xlink:label="lab_ptv_MarketPWERMAndHybridAllocationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Market, PWERM and Hybrid allocation [Member]</link:label>
    <link:label id="lab_ptv_MarketPWERMAndHybridAllocationMember_documentation_en-US" xlink:label="lab_ptv_MarketPWERMAndHybridAllocationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Market, PWERM and Hybrid allocation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_MarketPWERMAndHybridAllocationMember" xlink:href="ptv-20221231.xsd#ptv_MarketPWERMAndHybridAllocationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_MarketPWERMAndHybridAllocationMember" xlink:to="lab_ptv_MarketPWERMAndHybridAllocationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LongTermLoanMember_d0ebf755-61b5-4784-bbb7-b658bb08666a_verboseLabel_en-US" xlink:label="lab_ptv_LongTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan [Member]</link:label>
    <link:label id="lab_ptv_LongTermLoanMember_label_en-US" xlink:label="lab_ptv_LongTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan [Member]</link:label>
    <link:label id="lab_ptv_LongTermLoanMember_documentation_en-US" xlink:label="lab_ptv_LongTermLoanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LongTermLoanMember" xlink:href="ptv-20221231.xsd#ptv_LongTermLoanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LongTermLoanMember" xlink:to="lab_ptv_LongTermLoanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EntregaMember_887ff204-0a9b-4575-b940-3262bfb030bc_verboseLabel_en-US" xlink:label="lab_ptv_EntregaMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entrega, Inc. (indirectly held through Enlight)</link:label>
    <link:label id="lab_ptv_EntregaMember_58007294-bb0b-4121-9a12-f8b4e46fefcb_terseLabel_en-US" xlink:label="lab_ptv_EntregaMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entrega</link:label>
    <link:label id="lab_ptv_EntregaMember_label_en-US" xlink:label="lab_ptv_EntregaMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entrega [Member]</link:label>
    <link:label id="lab_ptv_EntregaMember_documentation_en-US" xlink:label="lab_ptv_EntregaMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entrega</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EntregaMember" xlink:href="ptv-20221231.xsd#ptv_EntregaMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EntregaMember" xlink:to="lab_ptv_EntregaMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock_d10ae2e0-4332-4bd4-9e2f-32a7ab4638bf_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in assets, level 3 fair value - investments held at fair value</link:label>
    <link:label id="lab_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in assets, level 3 fair value - investments held at fair value [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of changes in assets, level 3 fair value - investments held at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock" xlink:to="lab_ptv_DisclosureOfChangesInAssetsLevel3FairValueInvestmentsHeldAtFairValueTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock_4ea59f85-a805-49b2-97d0-3044f8cddad9_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiary share-based payments</link:label>
    <link:label id="lab_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Subsidiary Share-based Payment Plans [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Subsidiary Share-based Payment Plans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock" xlink:to="lab_ptv_DisclosureOfSubsidiaryShareBasedPaymentPlansTableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_d88f15b0-534b-4e6f-8333-34c255c168ae_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from sale of property and equipment</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from sales of property, plant and equipment, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:to="lab_ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_MarketBacksolveAndOPMAllocationMember_c3477085-eea0-4330-8fb6-d8e8813ecfeb_terseLabel_en-US" xlink:label="lab_ptv_MarketBacksolveAndOPMAllocationMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Market Backsolve &amp; OPM</link:label>
    <link:label id="lab_ptv_MarketBacksolveAndOPMAllocationMember_label_en-US" xlink:label="lab_ptv_MarketBacksolveAndOPMAllocationMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Market, Backsolve and OPM allocation [Member]</link:label>
    <link:label id="lab_ptv_MarketBacksolveAndOPMAllocationMember_documentation_en-US" xlink:label="lab_ptv_MarketBacksolveAndOPMAllocationMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Market, Backsolve and OPM allocation</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_MarketBacksolveAndOPMAllocationMember" xlink:href="ptv-20221231.xsd#ptv_MarketBacksolveAndOPMAllocationMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_MarketBacksolveAndOPMAllocationMember" xlink:to="lab_ptv_MarketBacksolveAndOPMAllocationMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Goodwill_afdc0046-b45c-4dcf-be58-6184ebfaf159_terseLabel_en-US" xlink:label="lab_ifrs-full_Goodwill" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_ifrs-full_Goodwill_label_en-US" xlink:label="lab_ifrs-full_Goodwill" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Goodwill" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Goodwill"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Goodwill" xlink:to="lab_ifrs-full_Goodwill" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_VedantaBiosciencesSecuritiesCorpMember_9ecedaa7-840e-4cc9-9174-b3812ab2fd62_verboseLabel_en-US" xlink:label="lab_ptv_VedantaBiosciencesSecuritiesCorpMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vedanta Biosciences Securities Corp. (indirectly held through Vedanta)</link:label>
    <link:label id="lab_ptv_VedantaBiosciencesSecuritiesCorpMember_label_en-US" xlink:label="lab_ptv_VedantaBiosciencesSecuritiesCorpMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vedanta Biosciences Securities Corp [Member]</link:label>
    <link:label id="lab_ptv_VedantaBiosciencesSecuritiesCorpMember_documentation_en-US" xlink:label="lab_ptv_VedantaBiosciencesSecuritiesCorpMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Vedanta Biosciences Securities Corp</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_VedantaBiosciencesSecuritiesCorpMember" xlink:href="ptv-20221231.xsd#ptv_VedantaBiosciencesSecuritiesCorpMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_VedantaBiosciencesSecuritiesCorpMember" xlink:to="lab_ptv_VedantaBiosciencesSecuritiesCorpMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareBasedPaymentArrangementsAbstract_label_en-US" xlink:label="lab_ptv_ShareBasedPaymentArrangementsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Payment Arrangements [Abstract]</link:label>
    <link:label id="lab_ptv_ShareBasedPaymentArrangementsAbstract_documentation_en-US" xlink:label="lab_ptv_ShareBasedPaymentArrangementsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Payment Arrangements [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedPaymentArrangementsAbstract" xlink:href="ptv-20221231.xsd#ptv_ShareBasedPaymentArrangementsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedPaymentArrangementsAbstract" xlink:to="lab_ptv_ShareBasedPaymentArrangementsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DeferredTaxExpenseIncome_631d4163-3844-4415-b20d-09a073e97943_terseLabel_en-US" xlink:label="lab_ifrs-full_DeferredTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total deferred income tax expense/(benefit)</link:label>
    <link:label id="lab_ifrs-full_DeferredTaxExpenseIncome_label_en-US" xlink:label="lab_ifrs-full_DeferredTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax expense (income)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxExpenseIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DeferredTaxExpenseIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DeferredTaxExpenseIncome" xlink:to="lab_ifrs-full_DeferredTaxExpenseIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentShellCompanyReport_2b0f427e-4035-4d79-857b-d25f66700354_terseLabel_en-US" xlink:label="lab_dei_DocumentShellCompanyReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Shell Company Report</link:label>
    <link:label id="lab_dei_DocumentShellCompanyReport_label_en-US" xlink:label="lab_dei_DocumentShellCompanyReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Shell Company Report</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentShellCompanyReport" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentShellCompanyReport"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentShellCompanyReport" xlink:to="lab_dei_DocumentShellCompanyReport" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract_6c61eb75-2043-4891-b727-2ddabec0c5b7_terseLabel_en-US" xlink:label="lab_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in operating assets and liabilities:</link:label>
    <link:label id="lab_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract_label_en-US" xlink:label="lab_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in operating assets and liabilities [Abstract]</link:label>
    <link:label id="lab_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract_documentation_en-US" xlink:label="lab_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in operating assets and liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract" xlink:href="ptv-20221231.xsd#ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract" xlink:to="lab_ptv_ChangesInOperatingAssetsAndLiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageNumberOfOrdinarySharesLineItems_db992a24-dd74-495c-9fcd-61f4a7b40a3e_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageNumberOfOrdinarySharesLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average number of ordinary shares [Line Items]</link:label>
    <link:label id="lab_ptv_WeightedAverageNumberOfOrdinarySharesLineItems_label_en-US" xlink:label="lab_ptv_WeightedAverageNumberOfOrdinarySharesLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average number of ordinary shares [Line Items]</link:label>
    <link:label id="lab_ptv_WeightedAverageNumberOfOrdinarySharesLineItems_documentation_en-US" xlink:label="lab_ptv_WeightedAverageNumberOfOrdinarySharesLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average number of ordinary shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageNumberOfOrdinarySharesLineItems" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageNumberOfOrdinarySharesLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageNumberOfOrdinarySharesLineItems" xlink:to="lab_ptv_WeightedAverageNumberOfOrdinarySharesLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_srt_RangeAxis_b1140b4f-91dd-40f0-864f-2df8a8e1f47f_terseLabel_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_label_en-US" xlink:label="lab_srt_RangeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Statistical Measurement [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis" xlink:to="lab_srt_RangeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory_790a52c9-ff14-4b16-b385-0dfccdb3a325_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Payments</link:label>
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    <link:label id="lab_ifrs-full_LossesOnDisposalsOfInvestments_9a53cc21-f4d4-4a3f-b8e0-ae053fb7e8db_negatedLabel_en-US" xlink:label="lab_ifrs-full_LossesOnDisposalsOfInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realized loss on sale of investments</link:label>
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    <link:label id="lab_ifrs-full_CreditExposure_5ae71a1d-5042-44ec-8532-bd247e20e6fc_totalLabel_en-US" xlink:label="lab_ifrs-full_CreditExposure" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total</link:label>
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    <link:label id="lab_ptv_NotesPayableTable_c35b6c50-352b-4059-be03-356d8cb206b1_terseLabel_en-US" xlink:label="lab_ptv_NotesPayableTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes Payable [Table]</link:label>
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    <link:label id="lab_ptv_NotesPayableTable_documentation_en-US" xlink:label="lab_ptv_NotesPayableTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes Payable</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentReceivables_7af0dbe7-37e5-4cce-be79-5f48b29960f6_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentReceivables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other receivables</link:label>
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    <link:label id="lab_ptv_SPACExchangeAdditionalInvestmentInAssociates_c9b7aa95-afa9-4a15-9336-e9e5fb11a431_terseLabel_en-US" xlink:label="lab_ptv_SPACExchangeAdditionalInvestmentInAssociates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional investment as a result of backstop settlement (see above)</link:label>
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    <link:label id="lab_ifrs-full_NotesAndDebenturesIssued_5791f4cc-b152-4581-a439-3c2e6ded38ba_terseLabel_en-US" xlink:label="lab_ifrs-full_NotesAndDebenturesIssued" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes payable</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfAssetsAxis_5ab9b53a-8022-4072-86a6-6882ef3315a2_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfAssetsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of assets [axis]</link:label>
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    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_d33430e8-949a-4439-9f94-9328fddd346a_terseLabel_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [axis]</link:label>
    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_label_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [axis]</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity_b60f17dd-5b4a-4da5-a1a9-adb70a1f4554_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
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    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesApprovedForIssuance_dd887ff0-6e20-4773-896d-8873bb330acc_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesApprovedForIssuance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share approved for issuance (in shares)</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForTreasurySharesExplanatory_5cec2ddd-ca87-4039-aaa4-11d639488d09_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForTreasurySharesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Treasury Shares</link:label>
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    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesApprovedForIssuance_ee733b43-5f30-42d7-a6b2-34b22d76ecd8_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInSharesApprovedForIssuance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase in shares approved for issuance (in shares)</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory_4f6b4972-8d10-4def-93a4-542ecc204d80_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of detailed information about intangible assets</link:label>
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    <link:label id="lab_ptv_ValueAtIssuance_083516f9-6732-4b34-b576-49d7e3310e00_terseLabel_en-US" xlink:label="lab_ptv_ValueAtIssuance" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value at issuance</link:label>
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    <link:label id="lab_ptv_ValueAtIssuance_documentation_en-US" xlink:label="lab_ptv_ValueAtIssuance" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Value at Issuance</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ValueAtIssuance" xlink:href="ptv-20221231.xsd#ptv_ValueAtIssuance"/>
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    <link:label id="lab_dei_EntityAddressesAddressTypeAxis_6cdd6d10-7bb7-4e23-ab88-7f8dc73962a5_terseLabel_en-US" xlink:label="lab_dei_EntityAddressesAddressTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses, Address Type [Axis]</link:label>
    <link:label id="lab_dei_EntityAddressesAddressTypeAxis_label_en-US" xlink:label="lab_dei_EntityAddressesAddressTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Addresses, Address Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressesAddressTypeAxis" xlink:to="lab_dei_EntityAddressesAddressTypeAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities_c7224428-bc82-431b-8824-502a93b3428e_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of reasonably possible decrease in unobservable input, liabilities</link:label>
    <link:label id="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities_label_en-US" xlink:label="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage of reasonably possible decrease in unobservable input, liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" xlink:to="lab_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock_2fa0e63a-d7d5-468c-88f0-2042f0da3e23_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value</link:label>
    <link:label id="lab_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Investments held at fair value [Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure Of Investments held at fair value</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock" xlink:to="lab_ptv_DisclosureOfInvestmentsHeldAtFairValueTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IssueOfEquity_524d2e3b-e6ce-4a6c-9393-a50a88378285_terseLabel_en-US" xlink:label="lab_ifrs-full_IssueOfEquity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of new preferred shares &#8211; financing cash flow</link:label>
    <link:label id="lab_ifrs-full_IssueOfEquity_label_en-US" xlink:label="lab_ifrs-full_IssueOfEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issue of equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssueOfEquity" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssueOfEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssueOfEquity" xlink:to="lab_ifrs-full_IssueOfEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForReconcileProfitLossAbstract_4811263d-7b87-47f2-a32a-20da20761177_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments to reconcile net income/(loss) to net cash used in operating activities:</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForReconcileProfitLossAbstract_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments to reconcile profit (loss) [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForReconcileProfitLossAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:to="lab_ifrs-full_AdjustmentsForReconcileProfitLossAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_AuditorFirmId_9a7efa99-4300-4ee8-9e73-aa5c3b43a8ae_terseLabel_en-US" xlink:label="lab_dei_AuditorFirmId" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor Firm ID</link:label>
    <link:label id="lab_dei_AuditorFirmId_label_en-US" xlink:label="lab_dei_AuditorFirmId" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor Firm ID</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorFirmId" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_AuditorFirmId"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AuditorFirmId" xlink:to="lab_dei_AuditorFirmId" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfBorrowingsExplanatory_71fabd00-7aa5-4867-a320-ca158ac6955c_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfBorrowingsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of borrowings [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfBorrowingsExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:to="lab_ifrs-full_DisclosureOfBorrowingsExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_DocumentTransitionReport_a3769d3e-c750-49f6-8175-770166f84d89_terseLabel_en-US" xlink:label="lab_dei_DocumentTransitionReport" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Transition Report</link:label>
    <link:label id="lab_dei_DocumentTransitionReport_label_en-US" xlink:label="lab_dei_DocumentTransitionReport" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Transition Report</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentTransitionReport"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentTransitionReport" xlink:to="lab_dei_DocumentTransitionReport" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_LocalPhoneNumber_249c7bd0-4323-4a93-a8d7-2e4893dd8b4c_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_label_en-US" xlink:label="lab_dei_LocalPhoneNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LocalPhoneNumber"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber" xlink:to="lab_dei_LocalPhoneNumber" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PreferredShareLiability_c9c99e07-8643-49af-8791-10025ad8e9e9_terseLabel_en-US" xlink:label="lab_ptv_PreferredShareLiability" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred shares</link:label>
    <link:label id="lab_ptv_PreferredShareLiability_6f558324-be4d-4a9b-aaad-1267bd6ab9e0_verboseLabel_en-US" xlink:label="lab_ptv_PreferredShareLiability" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary preferred shares</link:label>
    <link:label id="lab_ptv_PreferredShareLiability_fd772927-1485-4e12-888d-ce365bb34d1c_periodStartLabel_en-US" xlink:label="lab_ptv_PreferredShareLiability" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_ptv_PreferredShareLiability_d591fec4-333d-4d4c-ba16-a517d6e84e54_periodEndLabel_en-US" xlink:label="lab_ptv_PreferredShareLiability" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_ptv_PreferredShareLiability_label_en-US" xlink:label="lab_ptv_PreferredShareLiability" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Share Liability</link:label>
    <link:label id="lab_ptv_PreferredShareLiability_documentation_en-US" xlink:label="lab_ptv_PreferredShareLiability" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred Share Liability</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PreferredShareLiability" xlink:href="ptv-20221231.xsd#ptv_PreferredShareLiability"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PreferredShareLiability" xlink:to="lab_ptv_PreferredShareLiability" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LeaseLiabilities_beab4061-cf9e-46a8-a1cb-c7e2b502a1f7_periodStartLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at beginning of period</link:label>
    <link:label id="lab_ifrs-full_LeaseLiabilities_961c841a-cea8-4c52-aeb4-8ed5499eece0_periodEndLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance at end of period</link:label>
    <link:label id="lab_ifrs-full_LeaseLiabilities_32af9c25-48dc-42f4-9bcd-8ce25654eafe_totalLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Lease Liability</link:label>
    <link:label id="lab_ifrs-full_LeaseLiabilities_2e476f99-c937-49ed-920f-7e5f150a4baa_terseLabel_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Lease Liability</link:label>
    <link:label id="lab_ifrs-full_LeaseLiabilities_label_en-US" xlink:label="lab_ifrs-full_LeaseLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LeaseLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LeaseLiabilities" xlink:to="lab_ifrs-full_LeaseLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AvailableIndefinitelyMember_01c159b8-d8f3-48c0-955e-f806765696fc_terseLabel_en-US" xlink:label="lab_ptv_AvailableIndefinitelyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Available indefinitely</link:label>
    <link:label id="lab_ptv_AvailableIndefinitelyMember_label_en-US" xlink:label="lab_ptv_AvailableIndefinitelyMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Available indefinitely [Member]</link:label>
    <link:label id="lab_ptv_AvailableIndefinitelyMember_documentation_en-US" xlink:label="lab_ptv_AvailableIndefinitelyMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Available indefinitely</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AvailableIndefinitelyMember" xlink:href="ptv-20221231.xsd#ptv_AvailableIndefinitelyMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AvailableIndefinitelyMember" xlink:to="lab_ptv_AvailableIndefinitelyMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets_65f64075-effa-4692-b0d3-80aa9fb5e764_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Realized loss on sale of investments</link:label>
    <link:label id="lab_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Adjustments for losses (gains) on disposal of non-current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:to="lab_ifrs-full_AdjustmentsForLossesGainsOnDisposalOfNoncurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_ac3fbe89-5c2f-4c6a-b671-a87a0d97e3b8_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of property, plant and equipment [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of property, plant and equipment [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:to="lab_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory_4c600288-fa2b-4684-8e2e-d05101842800_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating Segments</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for segment reporting [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfInterestsInSubsidiariesTable_991bd172-abf4-4a44-8baf-72835d35bb75_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfInterestsInSubsidiariesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of interests in Subsidiaries [Table]</link:label>
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    <link:label id="lab_ptv_SeniorManagersMember_documentation_en-US" xlink:label="lab_ptv_SeniorManagersMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Senior Managers</link:label>
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    <link:label id="lab_ifrs-full_WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract_ffd21901-967c-458f-8b9d-0d23870d7042_terseLabel_en-US" xlink:label="lab_ifrs-full_WeightedAverageSharesAndAdjustedWeightedAverageSharesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]</link:label>
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    <link:label id="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsExercisableTableTextBlock_43d2481a-7944-491e-af3c-35c7944f548a_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsExercisableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of weighted average exercise prices for options exercisable</link:label>
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    <link:label id="lab_dei_DocumentFiscalPeriodFocus_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Document Fiscal Period Focus</link:label>
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    <link:label id="lab_ptv_ScheduleOfConvertibleNotesTableTextBlock_abc09412-b6ec-4481-a5f0-25edd84865ea_terseLabel_en-US" xlink:label="lab_ptv_ScheduleOfConvertibleNotesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of convertible notes</link:label>
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    <link:label id="lab_ptv_ScheduleOfConvertibleNotesTableTextBlock_documentation_en-US" xlink:label="lab_ptv_ScheduleOfConvertibleNotesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Convertible Notes</link:label>
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    <link:label id="lab_ptv_KnodeMember_7dc9a281-3b45-4bf4-b250-3f97c201be6a_verboseLabel_en-US" xlink:label="lab_ptv_KnodeMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Knode Inc. (indirectly held through Enlight)</link:label>
    <link:label id="lab_ptv_KnodeMember_cd2f95be-11de-4ff5-a5dd-7c72cbecbb82_terseLabel_en-US" xlink:label="lab_ptv_KnodeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Knode</link:label>
    <link:label id="lab_ptv_KnodeMember_label_en-US" xlink:label="lab_ptv_KnodeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Knode [Member]</link:label>
    <link:label id="lab_ptv_KnodeMember_documentation_en-US" xlink:label="lab_ptv_KnodeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Knode</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_KnodeMember" xlink:href="ptv-20221231.xsd#ptv_KnodeMember"/>
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    <link:label id="lab_ptv_ScheduleOfNotesPayableTableTextBlock_383d783c-f379-481d-859a-521c75a8b220_terseLabel_en-US" xlink:label="lab_ptv_ScheduleOfNotesPayableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiary notes payable</link:label>
    <link:label id="lab_ptv_ScheduleOfNotesPayableTableTextBlock_label_en-US" xlink:label="lab_ptv_ScheduleOfNotesPayableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Notes Payable [Table Text Block]</link:label>
    <link:label id="lab_ptv_ScheduleOfNotesPayableTableTextBlock_documentation_en-US" xlink:label="lab_ptv_ScheduleOfNotesPayableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Notes Payable</link:label>
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    <link:label id="lab_ptv_AkiliMember_eab217e7-266c-4486-8f1c-838c51f654a1_terseLabel_en-US" xlink:label="lab_ptv_AkiliMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Akili</link:label>
    <link:label id="lab_ptv_AkiliMember_label_en-US" xlink:label="lab_ptv_AkiliMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Akili [Member]</link:label>
    <link:label id="lab_ptv_AkiliMember_documentation_en-US" xlink:label="lab_ptv_AkiliMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Akili</link:label>
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    <link:label id="lab_ptv_AccountingPoliciesAbstract_09a933d7-8eea-46ec-8dbd-b7498076bb42_terseLabel_en-US" xlink:label="lab_ptv_AccountingPoliciesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting policies, changes in accounting estimates and errors [Abstract]</link:label>
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    <link:label id="lab_ptv_AccountingPoliciesAbstract_documentation_en-US" xlink:label="lab_ptv_AccountingPoliciesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies</link:label>
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    <link:label id="lab_ifrs-full_IssuedCapitalPreferenceShares_381eff04-ba69-4b94-ab26-787d4cc6a5fe_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapitalPreferenceShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary preferred shares</link:label>
    <link:label id="lab_ifrs-full_IssuedCapitalPreferenceShares_label_en-US" xlink:label="lab_ifrs-full_IssuedCapitalPreferenceShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued capital, preference shares</link:label>
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    <link:label id="lab_ptv_DrJosephBolenMember_295a077f-aa8c-4ee1-9ff5-f2d3c84da053_terseLabel_en-US" xlink:label="lab_ptv_DrJosephBolenMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Joseph Bolen</link:label>
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    <link:label id="lab_ptv_DrJosephBolenMember_documentation_en-US" xlink:label="lab_ptv_DrJosephBolenMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dr Joseph Bolen</link:label>
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    <link:label id="lab_dei_IcfrAuditorAttestationFlag_3cab5f7d-1db3-4fce-99b6-22190e668505_terseLabel_en-US" xlink:label="lab_dei_IcfrAuditorAttestationFlag" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">ICFR Auditor Attestation Flag</link:label>
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    <link:label id="lab_ifrs-full_ConstructionInProgressMember_4854e805-9768-4231-bb7a-07b643be6e97_terseLabel_en-US" xlink:label="lab_ifrs-full_ConstructionInProgressMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Construction in progress</link:label>
    <link:label id="lab_ifrs-full_ConstructionInProgressMember_label_en-US" xlink:label="lab_ifrs-full_ConstructionInProgressMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Construction in progress [member]</link:label>
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    <link:label id="lab_ptv_ExercisePriceRangeFourMember_9bc114a1-2b79-4fa7-be66-a09a78327d55_terseLabel_en-US" xlink:label="lab_ptv_ExercisePriceRangeFourMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">3.00 to 4.00</link:label>
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    <link:label id="lab_ifrs-full_LicencesMember_5015174c-de07-4e37-af63-4d74de54c102_terseLabel_en-US" xlink:label="lab_ifrs-full_LicencesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Licenses</link:label>
    <link:label id="lab_ifrs-full_LicencesMember_label_en-US" xlink:label="lab_ifrs-full_LicencesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Licences [member]</link:label>
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    <link:label id="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_19134f45-1682-475c-b64f-bfc7eccc7fd9_terseLabel_en-US" xlink:label="lab_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additions, net of transfers</link:label>
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    <link:label id="lab_ptv_ShortTermInvestments_3f2a1987-2e50-493f-ad3d-e73fb96b066c_terseLabel_en-US" xlink:label="lab_ptv_ShortTermInvestments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term investments</link:label>
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    <link:label id="lab_ptv_ShortTermInvestments_documentation_en-US" xlink:label="lab_ptv_ShortTermInvestments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term Investments</link:label>
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    <link:label id="lab_ptv_ReceiptOfPaymentOfSublease_documentation_en-US" xlink:label="lab_ptv_ReceiptOfPaymentOfSublease" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Receipt of payment of sublease</link:label>
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    <link:label id="lab_ifrs-full_BorrowingsByNameAxis_39680e2c-657a-4bf7-a34a-ee4d0868ecaa_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings by name [axis]</link:label>
    <link:label id="lab_ifrs-full_BorrowingsByNameAxis_label_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings by name [axis]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfChangesInFinancialLiabilitiesLevel3FairValueSubsidiaryPreferredSharesAndConvertibleNotesTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfChangesInFinancialLiabilitiesLevel3FairValueSubsidiaryPreferredSharesAndConvertibleNotesTableTextBlock"/>
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    <link:label id="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_b859417e-ca37-4c71-bafd-1e7d4a30d79b_verboseLabel_en-US" xlink:label="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Range of Exercise Prices (in GBP per share)</link:label>
    <link:label id="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_9b027cc7-4ed3-4468-bcdc-ec094f7b4dd9_terseLabel_en-US" xlink:label="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price range (in dollars per share)</link:label>
    <link:label id="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_label_en-US" xlink:label="lab_ifrs-full_ExercisePriceOfOutstandingShareOptions2019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price of outstanding share options</link:label>
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    <link:label id="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock_aa25847c-c6e7-498e-9076-c500e640a1f6_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of weighted average exercise prices for options forfeited</link:label>
    <link:label id="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Weighted Average Exercise Prices for Options Forfeited [Table Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Weighted Average Exercise Prices for Options Forfeited</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfWeightedAverageExercisePricesForOptionsForfeitedTableTextBlock"/>
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    <link:label id="lab_ifrs-full_SharePremium_f62d7601-1c9f-4f6b-bbca-b47c098cc144_terseLabel_en-US" xlink:label="lab_ifrs-full_SharePremium" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share premium</link:label>
    <link:label id="lab_ifrs-full_SharePremium_label_en-US" xlink:label="lab_ifrs-full_SharePremium" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share premium</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharePremium" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SharePremium"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SharePremium" xlink:to="lab_ifrs-full_SharePremium" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_5bc00857-4c9e-4eb8-9a14-29cf9b549934_terseLabel_en-US" xlink:label="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Effect of dilutive shares (in shares)</link:label>
    <link:label id="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_label_en-US" xlink:label="lab_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Dilutive effect of share options on number of ordinary shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares"/>
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    <link:label id="lab_ifrs-full_NetDeferredTaxLiabilities_7da94bfc-8fc2-4081-ad7e-2aac3274e5f5_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_NetDeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax liabilities, net, recognized</link:label>
    <link:label id="lab_ifrs-full_NetDeferredTaxLiabilities_label_en-US" xlink:label="lab_ifrs-full_NetDeferredTaxLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net deferred tax liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDeferredTaxLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NetDeferredTaxLiabilities"/>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_a81a916f-7feb-4943-9152-26a48339d177_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade payables</link:label>
    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_label_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current trade payables</link:label>
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    <link:label id="lab_ptv_ShareOfAssociateLossAllocatedToLongTermInterest_a29375d8-8cad-44e7-8933-ef190b6456df_terseLabel_en-US" xlink:label="lab_ptv_ShareOfAssociateLossAllocatedToLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of associate loss allocated to long-term interest (see Note 6)</link:label>
    <link:label id="lab_ptv_ShareOfAssociateLossAllocatedToLongTermInterest_label_en-US" xlink:label="lab_ptv_ShareOfAssociateLossAllocatedToLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of associate loss allocated to long-term interest</link:label>
    <link:label id="lab_ptv_ShareOfAssociateLossAllocatedToLongTermInterest_documentation_en-US" xlink:label="lab_ptv_ShareOfAssociateLossAllocatedToLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of associate loss allocated to long-term interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareOfAssociateLossAllocatedToLongTermInterest" xlink:href="ptv-20221231.xsd#ptv_ShareOfAssociateLossAllocatedToLongTermInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareOfAssociateLossAllocatedToLongTermInterest" xlink:to="lab_ptv_ShareOfAssociateLossAllocatedToLongTermInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory_5135c186-6ffb-429f-be79-89022c1554c6_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Assets</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for financial assets [text block]</link:label>
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    <link:label id="lab_ifrs-full_FinanceIncome_a5f4857a-a65a-4a32-a641-6341083222a7_terseLabel_en-US" xlink:label="lab_ifrs-full_FinanceIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income</link:label>
    <link:label id="lab_ifrs-full_FinanceIncome_f7399e58-dac4-4234-95b7-3bf6bc711949_totalLabel_en-US" xlink:label="lab_ifrs-full_FinanceIncome" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total finance income</link:label>
    <link:label id="lab_ifrs-full_FinanceIncome_label_en-US" xlink:label="lab_ifrs-full_FinanceIncome" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance income</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceIncome"/>
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    <link:label id="lab_ptv_AccruedInterestConvertibleNotes_1ae26993-6cbb-4abc-80d2-3f67c70c1b84_terseLabel_en-US" xlink:label="lab_ptv_AccruedInterestConvertibleNotes" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued interest on convertible notes - finance costs</link:label>
    <link:label id="lab_ptv_AccruedInterestConvertibleNotes_label_en-US" xlink:label="lab_ptv_AccruedInterestConvertibleNotes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued interest, Convertible Notes</link:label>
    <link:label id="lab_ptv_AccruedInterestConvertibleNotes_documentation_en-US" xlink:label="lab_ptv_AccruedInterestConvertibleNotes" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accrued interest, Convertible Notes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AccruedInterestConvertibleNotes" xlink:href="ptv-20221231.xsd#ptv_AccruedInterestConvertibleNotes"/>
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    <link:label id="lab_ptv_DebtInstrumentConvertiblePercentageOfEquityPriceTrigger_f40d8899-30d3-4643-b886-97a026347d94_terseLabel_en-US" xlink:label="lab_ptv_DebtInstrumentConvertiblePercentageOfEquityPriceTrigger" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible note, percentage of equity price trigger</link:label>
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    <link:label id="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_282961dc-ca8d-4616-8390-1b80d0031e65_terseLabel_en-US" xlink:label="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other payables</link:label>
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    <link:label id="lab_dei_EntityCurrentReportingStatus_490011e3-a765-4e48-aa17-0aa9d3aa645a_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Current Reporting Status</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesRecognisedWhenControlInSubsidiaryIsLost_9425a7e2-af19-4bdf-9f05-009134aa7f3d_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesRecognisedWhenControlInSubsidiaryIsLost" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on deconsolidation of subsidiary</link:label>
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    <link:label id="lab_ifrs-full_ProportionOfVotingPowerHeldInSubsidiary_f8bfe41b-55a5-4236-a48c-360c65d54e29_terseLabel_en-US" xlink:label="lab_ifrs-full_ProportionOfVotingPowerHeldInSubsidiary" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Voting percentage through the holdings</link:label>
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    <link:label id="lab_ifrs-full_Level3OfFairValueHierarchyMember_9374963e-2938-4820-8dd0-cab428651780_terseLabel_en-US" xlink:label="lab_ifrs-full_Level3OfFairValueHierarchyMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Level 3 of fair value hierarchy</link:label>
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    <link:label id="lab_ifrs-full_FinancialLiabilities_e754942f-9ac4-48a3-a01f-9ed4416d6df8_terseLabel_en-US" xlink:label="lab_ifrs-full_FinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial liabilities</link:label>
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    <link:label id="lab_ptv_ExcessOfFairValueAtReclassificationDateOverGrantDateFairValue_97a17b12-a0c6-4b0d-9805-0d7f2bc1623a_terseLabel_en-US" xlink:label="lab_ptv_ExcessOfFairValueAtReclassificationDateOverGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Excess of fair value at reclassification date over grant date fair value</link:label>
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    <link:label id="lab_ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementAssets_29c180fc-ff31-4fc6-b661-e0e29b1fd581_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesRecognisedInProfitOrLossExcludingExchangeDifferencesFairValueMeasurementAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain/(loss) on investment held at fair value</link:label>
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    <link:label id="lab_ifrs-full_ProfitLossFromOperatingActivities_175b2441-248d-420d-86f3-4931ad60e4d0_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLossFromOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Operating income/(loss)</link:label>
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    <link:label id="lab_ifrs-full_OtherTaxRateEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_a136e420-6a58-4d14-bb58-ef75b97b4c5f_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherTaxRateEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
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    <link:label id="lab_ptv_InterestOnUndiscountedLeasePayments_aef90c64-ee9c-43f7-b2fa-f8a7de6b1b75_terseLabel_en-US" xlink:label="lab_ptv_InterestOnUndiscountedLeasePayments" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest</link:label>
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    <link:label id="lab_ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate_b8071cae-c365-43d1-aa97-c5c415d3ce30_terseLabel_en-US" xlink:label="lab_ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Transaction Costs</link:label>
    <link:label id="lab_ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate_label_en-US" xlink:label="lab_ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of transaction costs, reconciliation of effective tax rate</link:label>
    <link:label id="lab_ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of transaction costs, reconciliation of effective tax rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_RateOfTransactionCostsReconciliationOfEffectiveTaxRate"/>
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    <link:label id="lab_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_2ca03672-2deb-42b5-8634-31697b37a7af_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on change in fair value of derivatives</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on change in fair value of derivatives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives"/>
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    <link:label id="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_fbb2f8d1-1459-4121-8bd2-f9f217928c0b_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Segment Information</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of entity's operating segments [text block]</link:label>
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    <link:label id="lab_ptv_PaymentToPurchaseTreasuryStock_3e30c4cf-67d3-40b8-a916-37654ad18c39_negatedTerseLabel_en-US" xlink:label="lab_ptv_PaymentToPurchaseTreasuryStock" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of treasury stock</link:label>
    <link:label id="lab_ptv_PaymentToPurchaseTreasuryStock_label_en-US" xlink:label="lab_ptv_PaymentToPurchaseTreasuryStock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment To Purchase Treasury Stock</link:label>
    <link:label id="lab_ptv_PaymentToPurchaseTreasuryStock_documentation_en-US" xlink:label="lab_ptv_PaymentToPurchaseTreasuryStock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Payment To Purchase Treasury Stock</link:label>
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    <link:label id="lab_ptv_ParentCompanyAndOtherMember_e887f7c7-1865-47ff-88e5-062950bc0f83_terseLabel_en-US" xlink:label="lab_ptv_ParentCompanyAndOtherMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Parent company and other</link:label>
    <link:label id="lab_ptv_ParentCompanyAndOtherMember_label_en-US" xlink:label="lab_ptv_ParentCompanyAndOtherMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Parent Company And Other [Member]</link:label>
    <link:label id="lab_ptv_ParentCompanyAndOtherMember_documentation_en-US" xlink:label="lab_ptv_ParentCompanyAndOtherMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Parent Company And Other</link:label>
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    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_9a1b40be-e1fa-4c0f-a52d-17c45ea69480_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based awards expiration period</link:label>
    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_label_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement By Share-based Payment Award, Expiration Period</link:label>
    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod_documentation_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-based Compensation Arrangement By Share-based Payment Award, Expiration Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:href="ptv-20221231.xsd#ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:to="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived_385ee8fa-581a-466a-a2eb-188a4ab8476b_verboseLabel_en-US" xlink:label="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undiscounted lease maturities</link:label>
    <link:label id="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived_label_en-US" xlink:label="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Undiscounted operating lease payments to be received</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:to="lab_ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable_14e3deda-8205-4824-a7d3-dda6cbb10025_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of associates [table]</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of associates [table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable" xlink:to="lab_ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TaxationAbstract_d0963cb0-feb3-4bc5-ba1f-f3f05cbc8abb_terseLabel_en-US" xlink:label="lab_ptv_TaxationAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation [Abstract]</link:label>
    <link:label id="lab_ptv_TaxationAbstract_label_en-US" xlink:label="lab_ptv_TaxationAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation [Abstract]</link:label>
    <link:label id="lab_ptv_TaxationAbstract_documentation_en-US" xlink:label="lab_ptv_TaxationAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TaxationAbstract" xlink:href="ptv-20221231.xsd#ptv_TaxationAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TaxationAbstract" xlink:to="lab_ptv_TaxationAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LiabilitiesAbstract_8e11f8cd-3e0a-4c0f-b0ca-095b75bab195_terseLabel_en-US" xlink:label="lab_ifrs-full_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_ifrs-full_LiabilitiesAbstract_label_en-US" xlink:label="lab_ifrs-full_LiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LiabilitiesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_LiabilitiesAbstract" xlink:to="lab_ifrs-full_LiabilitiesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_AdditionalNumberOfSharesAuthorizedToPurchase_48f24dc7-8471-4f59-8062-cb2a0b8b895f_terseLabel_en-US" xlink:label="lab_ptv_AdditionalNumberOfSharesAuthorizedToPurchase" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional number of shares authorized to purchase</link:label>
    <link:label id="lab_ptv_AdditionalNumberOfSharesAuthorizedToPurchase_label_en-US" xlink:label="lab_ptv_AdditionalNumberOfSharesAuthorizedToPurchase" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional number of shares authorized to purchase</link:label>
    <link:label id="lab_ptv_AdditionalNumberOfSharesAuthorizedToPurchase_documentation_en-US" xlink:label="lab_ptv_AdditionalNumberOfSharesAuthorizedToPurchase" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Additional number of shares authorized to purchase</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AdditionalNumberOfSharesAuthorizedToPurchase" xlink:href="ptv-20221231.xsd#ptv_AdditionalNumberOfSharesAuthorizedToPurchase"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AdditionalNumberOfSharesAuthorizedToPurchase" xlink:to="lab_ptv_AdditionalNumberOfSharesAuthorizedToPurchase" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice_fe877a99-ad14-45bd-b31f-d5a32ce7a1c4_terseLabel_en-US" xlink:label="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business combination, additional shares to be received at no additional cost, transaction cost</link:label>
    <link:label id="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice_label_en-US" xlink:label="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Additional Shares To Be Received At No Additional Cost, Transaction Price</link:label>
    <link:label id="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice_documentation_en-US" xlink:label="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combination, Additional Shares To Be Received At No Additional Cost, Transaction Price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice" xlink:href="ptv-20221231.xsd#ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice" xlink:to="lab_ptv_BusinessCombinationAdditionalSharesToBeReceivedAtNoAdditionalCostTransactionPrice" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityMember_2990756a-173f-435b-9637-8d57def91f5e_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity</link:label>
    <link:label id="lab_ifrs-full_EquityMember_label_en-US" xlink:label="lab_ifrs-full_EquityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity [member]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityMember" xlink:to="lab_ifrs-full_EquityMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory_c4e5b434-024a-4130-9dd4-89e09f39776f_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fair Value Measurements</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFairValueMeasurementExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for fair value measurement [text block]</link:label>
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    <link:label id="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_0da116ea-b855-4451-bd3f-58a6bea8c2e8_negatedLabel_en-US" xlink:label="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchases of short-term investments</link:label>
    <link:label id="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_PurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of financial instruments, classified as investing activities</link:label>
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    <link:label id="lab_ptv_AuditRelatedAssuranceServices_95da2133-7ce2-438c-b31d-fc59fd34253e_terseLabel_en-US" xlink:label="lab_ptv_AuditRelatedAssuranceServices" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Audit-related assurance services</link:label>
    <link:label id="lab_ptv_AuditRelatedAssuranceServices_label_en-US" xlink:label="lab_ptv_AuditRelatedAssuranceServices" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Audit related assurance services</link:label>
    <link:label id="lab_ptv_AuditRelatedAssuranceServices_documentation_en-US" xlink:label="lab_ptv_AuditRelatedAssuranceServices" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Audit related assurance services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_AuditRelatedAssuranceServices" xlink:href="ptv-20221231.xsd#ptv_AuditRelatedAssuranceServices"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_AuditRelatedAssuranceServices" xlink:to="lab_ptv_AuditRelatedAssuranceServices" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory_62062f4a-4133-458b-bc3a-6a0d85f97985_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of finance income (cost)</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of finance income (cost) [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory"/>
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    <link:label id="lab_ptv_SubsidiaryWarrantLiabilityMember_8a276a97-8956-4311-a60c-a5dbf0f928a0_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryWarrantLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary warrant liability</link:label>
    <link:label id="lab_ptv_SubsidiaryWarrantLiabilityMember_a21f2a79-df56-45f9-af2b-28dcb0882830_verboseLabel_en-US" xlink:label="lab_ptv_SubsidiaryWarrantLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Warrants [Member]</link:label>
    <link:label id="lab_ptv_SubsidiaryWarrantLiabilityMember_label_en-US" xlink:label="lab_ptv_SubsidiaryWarrantLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary warrant liability [Member]</link:label>
    <link:label id="lab_ptv_SubsidiaryWarrantLiabilityMember_documentation_en-US" xlink:label="lab_ptv_SubsidiaryWarrantLiabilityMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary warrant liability</link:label>
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    <link:label id="lab_ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate_07f6a1dc-672c-4f70-8cac-e1bdb773f17d_negatedTerseLabel_en-US" xlink:label="lab_ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Recognition of deferred tax assets and tax benefits not previously recognized</link:label>
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    <link:label id="lab_ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Deferred tax assets and benefits not previously recognised, reconciliation of effective tax rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate" xlink:to="lab_ptv_DeferredTaxAssetsAndBenefitsNotPreviouslyRecognisedReconciliationOfEffectiveTaxRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract_51cc36b0-a16d-4f30-aad3-4abdef085a77_terseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income/(loss) attributable to:</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract_f070bdaa-3172-45ed-a98b-6852a081b5aa_verboseLabel_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total comprehensive income/(loss) attributable to:</link:label>
    <link:label id="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract_label_en-US" xlink:label="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Comprehensive income attributable to [abstract]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:to="lab_ifrs-full_ComprehensiveIncomeAttributableToAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ExercisePrice_b521c6b4-3d64-4dc4-9ec5-803738b0e6e3_terseLabel_en-US" xlink:label="lab_ptv_ExercisePrice" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price (in dollars per share)</link:label>
    <link:label id="lab_ptv_ExercisePrice_label_en-US" xlink:label="lab_ptv_ExercisePrice" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price</link:label>
    <link:label id="lab_ptv_ExercisePrice_documentation_en-US" xlink:label="lab_ptv_ExercisePrice" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ExercisePrice" xlink:href="ptv-20221231.xsd#ptv_ExercisePrice"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ExercisePrice" xlink:to="lab_ptv_ExercisePrice" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn_f800c81c-9320-4e61-8500-b07287f71ee2_terseLabel_en-US" xlink:label="lab_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage vote and value of subsidiaries in the Group consolidated state tax return</link:label>
    <link:label id="lab_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn_label_en-US" xlink:label="lab_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage vote and value of subsidiaries in the Group consolidated state tax return</link:label>
    <link:label id="lab_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn_documentation_en-US" xlink:label="lab_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage vote and value of subsidiaries in the Group consolidated state tax return</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" xlink:href="ptv-20221231.xsd#ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" xlink:to="lab_ptv_PercentageVoteAndValueOfSubsidiariesInTheGroupConsolidatedStateTaxReturn" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems_bf883f31-3cdb-42bd-896b-d5ab15497ccd_terseLabel_en-US" xlink:label="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings/(Loss) attributable to owners of the Company [Line Items]</link:label>
    <link:label id="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems_label_en-US" xlink:label="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings/(Loss) attributable to owners of the Company [Line Items]</link:label>
    <link:label id="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems_documentation_en-US" xlink:label="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings/(Loss) attributable to owners of the Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems" xlink:href="ptv-20221231.xsd#ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems" xlink:to="lab_ptv_EarningsLossAttributableToOwnersOfTheCompanyLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShortTermNoteTable_9346bb2d-acc0-48c8-8249-63d62657cc4c_terseLabel_en-US" xlink:label="lab_ptv_ShortTermNoteTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Table]</link:label>
    <link:label id="lab_ptv_ShortTermNoteTable_label_en-US" xlink:label="lab_ptv_ShortTermNoteTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Table]</link:label>
    <link:label id="lab_ptv_ShortTermNoteTable_documentation_en-US" xlink:label="lab_ptv_ShortTermNoteTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShortTermNoteTable" xlink:href="ptv-20221231.xsd#ptv_ShortTermNoteTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShortTermNoteTable" xlink:to="lab_ptv_ShortTermNoteTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory_b7cc60e9-fea4-4321-acb0-1fc7e11148fb_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and Other Payables</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of trade and other payables [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits_f1bbaeb9-67c8-433a-bb16-f9d4d6ecfd04_terseLabel_en-US" xlink:label="lab_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Settlement of restricted stock units</link:label>
    <link:label id="lab_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits_label_en-US" xlink:label="lab_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase decrease through settlement of restricted stock units</link:label>
    <link:label id="lab_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits_documentation_en-US" xlink:label="lab_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase decrease through settlement of restricted stock units</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits" xlink:href="ptv-20221231.xsd#ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits" xlink:to="lab_ptv_IncreaseDecreaseThroughSettlementOfRestrictedStockUnits" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NumberOfSharesIssuedByInvestee_9cf99e70-7062-487d-b934-ff579c875e53_terseLabel_en-US" xlink:label="lab_ptv_NumberOfSharesIssuedByInvestee" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued by investee (in shares)</link:label>
    <link:label id="lab_ptv_NumberOfSharesIssuedByInvestee_label_en-US" xlink:label="lab_ptv_NumberOfSharesIssuedByInvestee" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued by investee</link:label>
    <link:label id="lab_ptv_NumberOfSharesIssuedByInvestee_documentation_en-US" xlink:label="lab_ptv_NumberOfSharesIssuedByInvestee" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares issued by investee</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NumberOfSharesIssuedByInvestee" xlink:href="ptv-20221231.xsd#ptv_NumberOfSharesIssuedByInvestee"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NumberOfSharesIssuedByInvestee" xlink:to="lab_ptv_NumberOfSharesIssuedByInvestee" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_LaterThanFiveYearsMember_18046a74-0126-429c-aa47-568187c6fc78_terseLabel_en-US" xlink:label="lab_ifrs-full_LaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">More than five years</link:label>
    <link:label id="lab_ifrs-full_LaterThanFiveYearsMember_label_en-US" xlink:label="lab_ifrs-full_LaterThanFiveYearsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Later than five years [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_LaterThanFiveYearsMember"/>
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    <link:label id="lab_ptv_BusinessOrSourcingCompanyAxis_51d91f55-e31d-4cb3-864f-99489dacc63b_terseLabel_en-US" xlink:label="lab_ptv_BusinessOrSourcingCompanyAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Or Sourcing Company [Axis]</link:label>
    <link:label id="lab_ptv_BusinessOrSourcingCompanyAxis_label_en-US" xlink:label="lab_ptv_BusinessOrSourcingCompanyAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Or Sourcing Company [Axis]</link:label>
    <link:label id="lab_ptv_BusinessOrSourcingCompanyAxis_documentation_en-US" xlink:label="lab_ptv_BusinessOrSourcingCompanyAxis" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Or Sourcing Company</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_BusinessOrSourcingCompanyAxis" xlink:href="ptv-20221231.xsd#ptv_BusinessOrSourcingCompanyAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_BusinessOrSourcingCompanyAxis" xlink:to="lab_ptv_BusinessOrSourcingCompanyAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory_ab8ced25-f698-4c09-900f-acec246b2285_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiaries</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiaries [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory"/>
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    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities_d4746334-e30c-4d23-a9d2-f119ea1e5d33_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other inflows (outflows) of cash, classified as operating activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:to="lab_ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsOperatingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DepreciationExpense_4afa9117-4831-4aac-a414-34b918afbf9f_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DepreciationExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation of tangible assets</link:label>
    <link:label id="lab_ifrs-full_DepreciationExpense_638153ee-cfb8-48d4-a6fd-d17d581b7d87_verboseLabel_en-US" xlink:label="lab_ifrs-full_DepreciationExpense" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation expense</link:label>
    <link:label id="lab_ifrs-full_DepreciationExpense_label_en-US" xlink:label="lab_ifrs-full_DepreciationExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Depreciation expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DepreciationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DepreciationExpense" xlink:to="lab_ifrs-full_DepreciationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_23324e29-7318-4044-b06b-799dfd0f1cb1_terseLabel_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity-accounted associate &#8211; share of other comprehensive income (loss)</link:label>
    <link:label id="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_label_en-US" xlink:label="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gains (losses) on exchange differences on translation of foreign operations, before tax</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:to="lab_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CurrentPortionOfLongtermBorrowings_36ed5e5e-54c1-469f-838d-50b0d3955507_terseLabel_en-US" xlink:label="lab_ifrs-full_CurrentPortionOfLongtermBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion of long-term loan</link:label>
    <link:label id="lab_ifrs-full_CurrentPortionOfLongtermBorrowings_label_en-US" xlink:label="lab_ifrs-full_CurrentPortionOfLongtermBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Current portion of non-current borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentPortionOfLongtermBorrowings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CurrentPortionOfLongtermBorrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CurrentPortionOfLongtermBorrowings" xlink:to="lab_ifrs-full_CurrentPortionOfLongtermBorrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit_27b3fc9c-59c8-43e3-8ea9-877634969d2b_terseLabel_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of common shares redeemable from each RSU (in shares)</link:label>
    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit_label_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Common Shares Redeemed Per Restricted Share Unit</link:label>
    <link:label id="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit_documentation_en-US" xlink:label="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Common Shares Redeemed Per Restricted Share Unit</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" xlink:href="ptv-20221231.xsd#ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" xlink:to="lab_ptv_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfCommonSharesRedeemedPerRestrictedShareUnit" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EquityPriceRiskMember_abacc7f9-f47a-4f5e-8c81-5d77ed43c74b_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityPriceRiskMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity price risk</link:label>
    <link:label id="lab_ifrs-full_EquityPriceRiskMember_label_en-US" xlink:label="lab_ifrs-full_EquityPriceRiskMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity price risk [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityPriceRiskMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_EquityPriceRiskMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EquityPriceRiskMember" xlink:to="lab_ifrs-full_EquityPriceRiskMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherCurrentFinancialLiabilities_e9c2cf87-566a-4f4d-af01-4d48dd0b96f1_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherCurrentFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other current financial liabilities</link:label>
    <link:label id="lab_ifrs-full_OtherCurrentFinancialLiabilities_label_en-US" xlink:label="lab_ifrs-full_OtherCurrentFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other current financial liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCurrentFinancialLiabilities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherCurrentFinancialLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherCurrentFinancialLiabilities" xlink:to="lab_ifrs-full_OtherCurrentFinancialLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DiscountConversionFromNotesQualifiedFinancing_68f7c48b-91fb-4926-841b-f84e1aa499f9_terseLabel_en-US" xlink:label="lab_ptv_DiscountConversionFromNotesQualifiedFinancing" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount, conversion from notes - qualified financing</link:label>
    <link:label id="lab_ptv_DiscountConversionFromNotesQualifiedFinancing_label_en-US" xlink:label="lab_ptv_DiscountConversionFromNotesQualifiedFinancing" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount, conversion from notes - qualified financing</link:label>
    <link:label id="lab_ptv_DiscountConversionFromNotesQualifiedFinancing_documentation_en-US" xlink:label="lab_ptv_DiscountConversionFromNotesQualifiedFinancing" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Discount, conversion from notes - qualified financing</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DiscountConversionFromNotesQualifiedFinancing" xlink:href="ptv-20221231.xsd#ptv_DiscountConversionFromNotesQualifiedFinancing"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DiscountConversionFromNotesQualifiedFinancing" xlink:to="lab_ptv_DiscountConversionFromNotesQualifiedFinancing" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest_1a94659a-948c-4875-862a-f58ec6cb2982_terseLabel_en-US" xlink:label="lab_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of losses recorded against Long Term Interests (LTIs)</link:label>
    <link:label id="lab_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest_label_en-US" xlink:label="lab_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of associate loss recorded against long-term interest</link:label>
    <link:label id="lab_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest_documentation_en-US" xlink:label="lab_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share of associate loss recorded against long-term interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest" xlink:href="ptv-20221231.xsd#ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest" xlink:to="lab_ptv_ShareOfAssociateLossRecordedAgainstLongTermInterest" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_NotionalAmount_a347423c-cc9d-4585-80b0-d128c0824185_terseLabel_en-US" xlink:label="lab_ifrs-full_NotionalAmount" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Aggregate principal amount</link:label>
    <link:label id="lab_ifrs-full_NotionalAmount_label_en-US" xlink:label="lab_ifrs-full_NotionalAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notional amount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_NotionalAmount"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_NotionalAmount" xlink:to="lab_ifrs-full_NotionalAmount" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TypesOfRisksMember_405af899-2b5e-4080-a0c7-8d7ac299a976_terseLabel_en-US" xlink:label="lab_ifrs-full_TypesOfRisksMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risks [member]</link:label>
    <link:label id="lab_ifrs-full_TypesOfRisksMember_label_en-US" xlink:label="lab_ifrs-full_TypesOfRisksMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Risks [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TypesOfRisksMember" xlink:to="lab_ifrs-full_TypesOfRisksMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SaleOfRoyaltyInterestMember_f5e35baf-4982-4db7-9f77-19baf428e2e3_terseLabel_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale of royalty interest</link:label>
    <link:label id="lab_ptv_SaleOfRoyaltyInterestMember_label_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Royalty Interest [Member]</link:label>
    <link:label id="lab_ptv_SaleOfRoyaltyInterestMember_documentation_en-US" xlink:label="lab_ptv_SaleOfRoyaltyInterestMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sale Of Royalty Interest</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SaleOfRoyaltyInterestMember" xlink:href="ptv-20221231.xsd#ptv_SaleOfRoyaltyInterestMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SaleOfRoyaltyInterestMember" xlink:to="lab_ptv_SaleOfRoyaltyInterestMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisableLineItems_5bfd3500-6839-4e2c-a473-4db5b4b715c0_terseLabel_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable [Line Items]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisableLineItems_label_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable [Line Items]</link:label>
    <link:label id="lab_ptv_WeightedAverageOptionsExercisableLineItems_documentation_en-US" xlink:label="lab_ptv_WeightedAverageOptionsExercisableLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted Average Options exercisable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_WeightedAverageOptionsExercisableLineItems" xlink:href="ptv-20221231.xsd#ptv_WeightedAverageOptionsExercisableLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_WeightedAverageOptionsExercisableLineItems" xlink:to="lab_ptv_WeightedAverageOptionsExercisableLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ContributedByMember_00517d32-3cf4-4450-abf3-1b3cad4f137f_terseLabel_en-US" xlink:label="lab_ptv_ContributedByMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributed By</link:label>
    <link:label id="lab_ptv_ContributedByMember_label_en-US" xlink:label="lab_ptv_ContributedByMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributed By [Member]</link:label>
    <link:label id="lab_ptv_ContributedByMember_documentation_en-US" xlink:label="lab_ptv_ContributedByMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Contributed By</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ContributedByMember" xlink:href="ptv-20221231.xsd#ptv_ContributedByMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ContributedByMember" xlink:to="lab_ptv_ContributedByMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LeaseLiabilityInitialTerm_8bc2ff09-a3f5-4e09-b058-b7671fa34578_terseLabel_en-US" xlink:label="lab_ptv_LeaseLiabilityInitialTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease liability, initial term</link:label>
    <link:label id="lab_ptv_LeaseLiabilityInitialTerm_label_en-US" xlink:label="lab_ptv_LeaseLiabilityInitialTerm" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability, Initial Term</link:label>
    <link:label id="lab_ptv_LeaseLiabilityInitialTerm_documentation_en-US" xlink:label="lab_ptv_LeaseLiabilityInitialTerm" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Lease Liability, Initial Term</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LeaseLiabilityInitialTerm" xlink:href="ptv-20221231.xsd#ptv_LeaseLiabilityInitialTerm"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LeaseLiabilityInitialTerm" xlink:to="lab_ptv_LeaseLiabilityInitialTerm" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_InvestmentsHeldAtFairValueAbstract_label_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value [Abstract]</link:label>
    <link:label id="lab_ptv_InvestmentsHeldAtFairValueAbstract_documentation_en-US" xlink:label="lab_ptv_InvestmentsHeldAtFairValueAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments held at fair value [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_InvestmentsHeldAtFairValueAbstract" xlink:href="ptv-20221231.xsd#ptv_InvestmentsHeldAtFairValueAbstract"/>
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    <link:label id="lab_ptv_TalMember_3742ed32-807a-40dc-96c1-88646e09e77c_verboseLabel_en-US" xlink:label="lab_ptv_TalMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tal Medical, Inc.</link:label>
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    <link:label id="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_0ef93f3f-df31-4f21-bc0e-8cb026456ded_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from maturity of short-term investments</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from sales or maturity of financial instruments, classified as investing activities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"/>
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    <link:label id="lab_country_US_07b9ad34-a036-45a8-9053-f0d73dc885e7_terseLabel_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">UNITED STATES</link:label>
    <link:label id="lab_country_US_label_en-US" xlink:label="lab_country_US" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">UNITED STATES</link:label>
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    <link:label id="lab_ptv_SondeMember_f7be3167-a102-40b9-9c96-7d5aadf96447_verboseLabel_en-US" xlink:label="lab_ptv_SondeMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sonde Health, Inc.</link:label>
    <link:label id="lab_ptv_SondeMember_f0a76f1a-e642-420e-88c7-8bc9d18edf03_terseLabel_en-US" xlink:label="lab_ptv_SondeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sonde</link:label>
    <link:label id="lab_ptv_SondeMember_label_en-US" xlink:label="lab_ptv_SondeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sonde [Member]</link:label>
    <link:label id="lab_ptv_SondeMember_documentation_en-US" xlink:label="lab_ptv_SondeMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sonde</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SondeMember" xlink:href="ptv-20221231.xsd#ptv_SondeMember"/>
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    <link:label id="lab_ptv_EndraHoldingsLLCMember_47e7e084-b919-4f4f-a405-e32b7d92d1a4_verboseLabel_en-US" xlink:label="lab_ptv_EndraHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Endra Holdings, LLC (held indirectly through Enlight)</link:label>
    <link:label id="lab_ptv_EndraHoldingsLLCMember_label_en-US" xlink:label="lab_ptv_EndraHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Endra Holdings LLC [Member]</link:label>
    <link:label id="lab_ptv_EndraHoldingsLLCMember_documentation_en-US" xlink:label="lab_ptv_EndraHoldingsLLCMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Endra Holdings LLC</link:label>
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    <link:label id="lab_ptv_PerformanceSharePlanMember_499531d1-e244-4318-a99a-55d9f0adf2db_terseLabel_en-US" xlink:label="lab_ptv_PerformanceSharePlanMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance share plan</link:label>
    <link:label id="lab_ptv_PerformanceSharePlanMember_label_en-US" xlink:label="lab_ptv_PerformanceSharePlanMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Plan [Member]</link:label>
    <link:label id="lab_ptv_PerformanceSharePlanMember_documentation_en-US" xlink:label="lab_ptv_PerformanceSharePlanMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Plan</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PerformanceSharePlanMember" xlink:href="ptv-20221231.xsd#ptv_PerformanceSharePlanMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PerformanceSharePlanMember" xlink:to="lab_ptv_PerformanceSharePlanMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AssetsAbstract_c4e1cffa-5a33-45d0-a78d-9874ca91eb7f_terseLabel_en-US" xlink:label="lab_ifrs-full_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_ifrs-full_AssetsAbstract_label_en-US" xlink:label="lab_ifrs-full_AssetsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Assets [abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AssetsAbstract" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AssetsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AssetsAbstract" xlink:to="lab_ifrs-full_AssetsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestInAssociate_3ca27a8b-bbe6-451b-9dac-7d5e0bc1590e_terseLabel_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Percentage ownership interest</link:label>
    <link:label id="lab_ifrs-full_ProportionOfOwnershipInterestInAssociate_label_en-US" xlink:label="lab_ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proportion of ownership interest in associate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ProportionOfOwnershipInterestInAssociate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:to="lab_ifrs-full_ProportionOfOwnershipInterestInAssociate" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_NontradingHoldingCompaniesAbstract_49b3d0c7-3d99-4158-818f-6f2d87f8fc07_terseLabel_en-US" xlink:label="lab_ptv_NontradingHoldingCompaniesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nontrading holding companies</link:label>
    <link:label id="lab_ptv_NontradingHoldingCompaniesAbstract_label_en-US" xlink:label="lab_ptv_NontradingHoldingCompaniesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nontrading holding companies [Abstract]</link:label>
    <link:label id="lab_ptv_NontradingHoldingCompaniesAbstract_documentation_en-US" xlink:label="lab_ptv_NontradingHoldingCompaniesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Nontrading holding companies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_NontradingHoldingCompaniesAbstract" xlink:href="ptv-20221231.xsd#ptv_NontradingHoldingCompaniesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_NontradingHoldingCompaniesAbstract" xlink:to="lab_ptv_NontradingHoldingCompaniesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_SecurityExchangeName_286e20b5-3422-4ab0-ae7a-fa6ff0a7fdda_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
    <link:label id="lab_dei_SecurityExchangeName_label_en-US" xlink:label="lab_dei_SecurityExchangeName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Security Exchange Name</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SecurityExchangeName"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SecurityExchangeName" xlink:to="lab_dei_SecurityExchangeName" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisposalsPropertyPlantAndEquipment_fa13afab-6be8-49b5-b18c-562b4f6a777f_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposals</link:label>
    <link:label id="lab_ifrs-full_DisposalsPropertyPlantAndEquipment_label_en-US" xlink:label="lab_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disposals, property, plant and equipment</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisposalsPropertyPlantAndEquipment"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:to="lab_ifrs-full_DisposalsPropertyPlantAndEquipment" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract_5e728452-e2e0-419c-b9ba-46b19a3a30b7_terseLabel_en-US" xlink:label="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors and Senior Managers Shareholdings and Share Incentive awards [Abstract]</link:label>
    <link:label id="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract_label_en-US" xlink:label="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors and Senior Managers Shareholdings and Share Incentive awards [Abstract]</link:label>
    <link:label id="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract_documentation_en-US" xlink:label="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Directors and Senior Managers Shareholdings and Share Incentive awards</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" xlink:href="ptv-20221231.xsd#ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" xlink:to="lab_ptv_DirectorsAndSeniorManagersShareholdingsAndShareIncentiveAwardsAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ConvertibleNoteReceivableMember_bcdc2926-4452-40e0-8aff-937d53eaee55_terseLabel_en-US" xlink:label="lab_ptv_ConvertibleNoteReceivableMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible note receivable</link:label>
    <link:label id="lab_ptv_ConvertibleNoteReceivableMember_label_en-US" xlink:label="lab_ptv_ConvertibleNoteReceivableMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Note Receivable [Member]</link:label>
    <link:label id="lab_ptv_ConvertibleNoteReceivableMember_documentation_en-US" xlink:label="lab_ptv_ConvertibleNoteReceivableMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Convertible Note Receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ConvertibleNoteReceivableMember" xlink:href="ptv-20221231.xsd#ptv_ConvertibleNoteReceivableMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ConvertibleNoteReceivableMember" xlink:to="lab_ptv_ConvertibleNoteReceivableMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory_82979542-9d11-47b0-bd8c-48cec25e16e5_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Instruments</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for financial instruments [text block]</link:label>
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    <link:label id="lab_ifrs-full_FinanceCosts_3c478c45-e44a-4745-be01-99e9dae3bf9c_negatedLabel_en-US" xlink:label="lab_ifrs-full_FinanceCosts" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance costs &#8211; contractual</link:label>
    <link:label id="lab_ifrs-full_FinanceCosts_982297fa-5fd0-4a46-b36d-519f4217a47a_negatedTotalLabel_en-US" xlink:label="lab_ifrs-full_FinanceCosts" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total finance cost &#8211; contractual</link:label>
    <link:label id="lab_ifrs-full_FinanceCosts_label_en-US" xlink:label="lab_ifrs-full_FinanceCosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Finance costs</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_FinanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinanceCosts" xlink:to="lab_ifrs-full_FinanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_UnusedFederalOrphanDrugTaxCredits_d6333803-e445-48a6-961d-ac4636007afa_terseLabel_en-US" xlink:label="lab_ptv_UnusedFederalOrphanDrugTaxCredits" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unused federal orphan drug tax credits</link:label>
    <link:label id="lab_ptv_UnusedFederalOrphanDrugTaxCredits_label_en-US" xlink:label="lab_ptv_UnusedFederalOrphanDrugTaxCredits" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unused Federal orphan drug tax credits</link:label>
    <link:label id="lab_ptv_UnusedFederalOrphanDrugTaxCredits_documentation_en-US" xlink:label="lab_ptv_UnusedFederalOrphanDrugTaxCredits" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unused Federal orphan drug tax credits</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_UnusedFederalOrphanDrugTaxCredits" xlink:href="ptv-20221231.xsd#ptv_UnusedFederalOrphanDrugTaxCredits"/>
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    <link:label id="lab_ptv_IssuedShareCapitalAcquired_5cd561a2-c5dc-4176-a5b9-fd5e7b9865f9_terseLabel_en-US" xlink:label="lab_ptv_IssuedShareCapitalAcquired" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued share capital acquired (in shares)</link:label>
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    <link:label id="lab_ptv_IssuedShareCapitalAcquired_documentation_en-US" xlink:label="lab_ptv_IssuedShareCapitalAcquired" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued Share capital acquired</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_IssuedShareCapitalAcquired" xlink:href="ptv-20221231.xsd#ptv_IssuedShareCapitalAcquired"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_IssuedShareCapitalAcquired" xlink:to="lab_ptv_IssuedShareCapitalAcquired" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod_ada9d6b0-2a51-4643-89b8-335a77a162f3_negatedLabel_en-US" xlink:label="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal of equity method losses recorded against LTIs (due to decrease in LTI fair value)</link:label>
    <link:label id="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod_c8702223-4f4f-4ee8-a847-b0607110ccc5_terseLabel_en-US" xlink:label="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal of equity method losses recorded against LTIs (due to decrease in LTI fair value)</link:label>
    <link:label id="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod_label_en-US" xlink:label="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal Of Investment Loss In Associates Accounted For Using Equity Method</link:label>
    <link:label id="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod_documentation_en-US" xlink:label="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reversal Of Investment Loss In Associates Accounted For Using Equity Method</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod" xlink:href="ptv-20221231.xsd#ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod" xlink:to="lab_ptv_ReversalOfInvestmentLossInAssociatesAccountedForUsingEquityMethod" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesBalancesTable_02a5c9ab-91d1-48bb-b59c-5a5d46361e4f_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesBalancesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares Balances [Table]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesBalancesTable_label_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesBalancesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares Balances [Table]</link:label>
    <link:label id="lab_ptv_SubsidiaryPreferredSharesBalancesTable_documentation_en-US" xlink:label="lab_ptv_SubsidiaryPreferredSharesBalancesTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Preferred Shares Balances [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryPreferredSharesBalancesTable" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryPreferredSharesBalancesTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryPreferredSharesBalancesTable" xlink:to="lab_ptv_SubsidiaryPreferredSharesBalancesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock_6afecf1f-dedb-4ae3-96eb-158878a8b1dc_terseLabel_en-US" xlink:label="lab_ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of trade and other payables</link:label>
    <link:label id="lab_ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock_label_en-US" xlink:label="lab_ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Trade And Other Payables [Table Text Block]</link:label>
    <link:label id="lab_ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock_documentation_en-US" xlink:label="lab_ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Trade And Other Payables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_ScheduleOfTradeAndOtherPayablesTableTextBlock"/>
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    <link:label id="lab_ifrs-full_DisclosureOfLiquidityRiskExplanatory_69346e21-bb08-4652-bf7e-cb3396bd228a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of liquidity risk</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfLiquidityRiskExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of liquidity risk [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfLiquidityRiskExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:to="lab_ifrs-full_DisclosureOfLiquidityRiskExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_4d33ab7d-8f52-426e-9074-0af26f800325_terseLabel_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits</link:label>
    <link:label id="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_label_en-US" xlink:label="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Temporary difference, unused tax losses and unused tax credits [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:to="lab_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShortTermInvestmentsMember_ecd22a9f-ccdd-4c7c-83fa-f740240e4146_terseLabel_en-US" xlink:label="lab_ptv_ShortTermInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term Investments</link:label>
    <link:label id="lab_ptv_ShortTermInvestmentsMember_label_en-US" xlink:label="lab_ptv_ShortTermInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-Term Investments [Member]</link:label>
    <link:label id="lab_ptv_ShortTermInvestmentsMember_documentation_en-US" xlink:label="lab_ptv_ShortTermInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-Term Investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShortTermInvestmentsMember" xlink:href="ptv-20221231.xsd#ptv_ShortTermInvestmentsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShortTermInvestmentsMember" xlink:to="lab_ptv_ShortTermInvestmentsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_CoverAbstract_label_en-US" xlink:label="lab_dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CoverAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract" xlink:to="lab_dei_CoverAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PreferenceSharesMember_20878d26-3e85-4656-b80e-615dbe8e3797_terseLabel_en-US" xlink:label="lab_ifrs-full_PreferenceSharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred</link:label>
    <link:label id="lab_ifrs-full_PreferenceSharesMember_label_en-US" xlink:label="lab_ifrs-full_PreferenceSharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preference shares [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PreferenceSharesMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_PreferenceSharesMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PreferenceSharesMember" xlink:to="lab_ifrs-full_PreferenceSharesMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityVoluntaryFilers_bdc01702-1a2c-4b15-a49a-b9da7320d2fe_terseLabel_en-US" xlink:label="lab_dei_EntityVoluntaryFilers" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:label id="lab_dei_EntityVoluntaryFilers_label_en-US" xlink:label="lab_dei_EntityVoluntaryFilers" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityVoluntaryFilers"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityVoluntaryFilers" xlink:to="lab_dei_EntityVoluntaryFilers" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables_dfacdc99-4e4b-4378-9079-5adcdcfeed36_terseLabel_en-US" xlink:label="lab_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property, plant and equipment against trade and other payables</link:label>
    <link:label id="lab_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables_label_en-US" xlink:label="lab_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property plant and equipment against trade and other payables</link:label>
    <link:label id="lab_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables_documentation_en-US" xlink:label="lab_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of property plant and equipment against trade and other payables</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" xlink:href="ptv-20221231.xsd#ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" xlink:to="lab_ptv_PurchaseOfPropertyPlantAndEquipmentAgainstTradeAndOtherPayables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AuditorsRemunerationForOtherServices_25394d5c-ff67-47e0-ad04-1ef3d478ed4a_terseLabel_en-US" xlink:label="lab_ifrs-full_AuditorsRemunerationForOtherServices" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-audit related services</link:label>
    <link:label id="lab_ifrs-full_AuditorsRemunerationForOtherServices_label_en-US" xlink:label="lab_ifrs-full_AuditorsRemunerationForOtherServices" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Auditor's remuneration for other services</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AuditorsRemunerationForOtherServices" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_AuditorsRemunerationForOtherServices"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AuditorsRemunerationForOtherServices" xlink:to="lab_ifrs-full_AuditorsRemunerationForOtherServices" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_10fd5f5b-a41d-4d2e-a92e-2bf69d1fc4d3_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of intangible assets other than goodwill [axis]</link:label>
    <link:label id="lab_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_label_en-US" xlink:label="lab_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Classes of intangible assets other than goodwill [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:to="lab_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ShortTermNoteFromAssociateMember_c4f63385-411a-48ad-a4b0-3ff0c6c5d27a_terseLabel_en-US" xlink:label="lab_ptv_ShortTermNoteFromAssociateMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note from associate</link:label>
    <link:label id="lab_ptv_ShortTermNoteFromAssociateMember_label_en-US" xlink:label="lab_ptv_ShortTermNoteFromAssociateMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note from associate [Member]</link:label>
    <link:label id="lab_ptv_ShortTermNoteFromAssociateMember_documentation_en-US" xlink:label="lab_ptv_ShortTermNoteFromAssociateMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term note from associate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ShortTermNoteFromAssociateMember" xlink:href="ptv-20221231.xsd#ptv_ShortTermNoteFromAssociateMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShortTermNoteFromAssociateMember" xlink:to="lab_ptv_ShortTermNoteFromAssociateMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue_28c5da7d-e5df-4837-a94c-c3bf09984692_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">IFRS 15, Revenue from Contracts with Customers</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for recognition of revenue [text block]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:to="lab_ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate_8e067234-19d3-4608-9b6a-aef4e6dc0381_terseLabel_en-US" xlink:label="lab_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Executive Compensation</link:label>
    <link:label id="lab_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate_label_en-US" xlink:label="lab_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of executive compensation, reconciliation of effective tax rate</link:label>
    <link:label id="lab_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Rate of executive compensation, reconciliation of effective tax rate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:to="lab_ptv_RateOfExecutiveCompensationReconciliationOfEffectiveTaxRate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates_58cadb17-d965-47a7-bcfd-0a81a30f72d7_terseLabel_en-US" xlink:label="lab_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares in entity held by entity or by its subsidiaries or associates (in shares)</link:label>
    <link:label id="lab_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates_label_en-US" xlink:label="lab_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of shares in entity held by entity or by its subsidiaries or associates</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:to="lab_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory_7d66dd97-cd77-4a4c-9bff-d7918b3b6d36_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Impairment</link:label>
    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory_label_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Description of accounting policy for impairment of non-financial assets [text block]</link:label>
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    <link:label id="lab_ptv_SubsidiaryAbstract_c59c50b0-3f5b-41a5-aed7-1f44360ef11a_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary:</link:label>
    <link:label id="lab_ptv_SubsidiaryAbstract_label_en-US" xlink:label="lab_ptv_SubsidiaryAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary [Abstract]</link:label>
    <link:label id="lab_ptv_SubsidiaryAbstract_documentation_en-US" xlink:label="lab_ptv_SubsidiaryAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryAbstract" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryAbstract" xlink:to="lab_ptv_SubsidiaryAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet_14c68d7d-994c-497f-8ec9-28f56ff77b29_terseLabel_en-US" xlink:label="lab_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities from share based payment transactions, performance and market conditions met</link:label>
    <link:label id="lab_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet_label_en-US" xlink:label="lab_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities From Share based Payment Transactions, performance and market conditions met</link:label>
    <link:label id="lab_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet_documentation_en-US" xlink:label="lab_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities From Share based Payment Transactions, performance and market conditions met</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet" xlink:href="ptv-20221231.xsd#ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet" xlink:to="lab_ptv_LiabilitiesFromShareBasedPaymentTransactionsPerformanceAndMarketConditionsMet" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_BorrowingsDiscountMember_046e3af2-9bb9-4bb0-bfe4-3c4df357e592_terseLabel_en-US" xlink:label="lab_ptv_BorrowingsDiscountMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Balance of accreted premium net of unamortized issuance costs</link:label>
    <link:label id="lab_ptv_BorrowingsDiscountMember_label_en-US" xlink:label="lab_ptv_BorrowingsDiscountMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, Discount [Member]</link:label>
    <link:label id="lab_ptv_BorrowingsDiscountMember_documentation_en-US" xlink:label="lab_ptv_BorrowingsDiscountMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, Discount</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_BorrowingsDiscountMember" xlink:href="ptv-20221231.xsd#ptv_BorrowingsDiscountMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_BorrowingsDiscountMember" xlink:to="lab_ptv_BorrowingsDiscountMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_Borrowings_5acb1913-860c-4b7d-93d0-d6c387981a15_terseLabel_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term loan</link:label>
    <link:label id="lab_ifrs-full_Borrowings_65297ac4-3da4-4902-b7e5-5ff3230e7ecd_periodStartLabel_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_ifrs-full_Borrowings_062c84d1-6164-4ca2-9157-a9b0e72f113a_periodEndLabel_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ending balance</link:label>
    <link:label id="lab_ifrs-full_Borrowings_8d6f8429-9851-4982-a712-8a122689fd70_totalLabel_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Long-term loan</link:label>
    <link:label id="lab_ifrs-full_Borrowings_label_en-US" xlink:label="lab_ifrs-full_Borrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_Borrowings"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_Borrowings" xlink:to="lab_ifrs-full_Borrowings" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryPlansLineItems_5f55de63-73ea-4c1d-a7d0-44614e7feea1_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Plans [Line Items]</link:label>
    <link:label id="lab_ptv_SubsidiaryPlansLineItems_label_en-US" xlink:label="lab_ptv_SubsidiaryPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Plans [Line Items]</link:label>
    <link:label id="lab_ptv_SubsidiaryPlansLineItems_documentation_en-US" xlink:label="lab_ptv_SubsidiaryPlansLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Plans</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryPlansLineItems" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryPlansLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryPlansLineItems" xlink:to="lab_ptv_SubsidiaryPlansLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod_04ffe60f-9438-49c2-aae1-3b54f2c70c6f_terseLabel_en-US" xlink:label="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity range, increase</link:label>
    <link:label id="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod_label_en-US" xlink:label="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Period</link:label>
    <link:label id="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod_documentation_en-US" xlink:label="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Increase In Risk Variable, Period</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod" xlink:href="ptv-20221231.xsd#ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod" xlink:to="lab_ptv_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleIncreaseInRiskVariablePeriod" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock_c156f7f1-a1df-4110-86b2-2565c166c77d_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Notes Payable</link:label>
    <link:label id="lab_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock_label_en-US" xlink:label="lab_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Subsidiary Notes Payable [Text Block]</link:label>
    <link:label id="lab_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock_documentation_en-US" xlink:label="lab_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Subsidiary Notes Payable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock" xlink:href="ptv-20221231.xsd#ptv_DisclosureOfSubsidiaryNotesPayableTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock" xlink:to="lab_ptv_DisclosureOfSubsidiaryNotesPayableTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_InvestmentInAssociatesAbstract_6df86403-21bb-41c4-abcc-80b9cc8141d7_terseLabel_en-US" xlink:label="lab_ptv_InvestmentInAssociatesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment in Associates [Abstract]</link:label>
    <link:label id="lab_ptv_InvestmentInAssociatesAbstract_label_en-US" xlink:label="lab_ptv_InvestmentInAssociatesAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment in Associates [Abstract]</link:label>
    <link:label id="lab_ptv_InvestmentInAssociatesAbstract_documentation_en-US" xlink:label="lab_ptv_InvestmentInAssociatesAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investment in Associates [Abstract]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_InvestmentInAssociatesAbstract" xlink:href="ptv-20221231.xsd#ptv_InvestmentInAssociatesAbstract"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_InvestmentInAssociatesAbstract" xlink:to="lab_ptv_InvestmentInAssociatesAbstract" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SeriesDMember_3383ef92-f545-4e0a-8f32-fa473a1566f4_terseLabel_en-US" xlink:label="lab_ptv_SeriesDMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series D</link:label>
    <link:label id="lab_ptv_SeriesDMember_label_en-US" xlink:label="lab_ptv_SeriesDMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series D [Member]</link:label>
    <link:label id="lab_ptv_SeriesDMember_documentation_en-US" xlink:label="lab_ptv_SeriesDMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series D</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SeriesDMember" xlink:href="ptv-20221231.xsd#ptv_SeriesDMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SeriesDMember" xlink:to="lab_ptv_SeriesDMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IssuedCapital_4da3a6ea-8f28-4bae-b921-dc9d079b4216_terseLabel_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share capital</link:label>
    <link:label id="lab_ifrs-full_IssuedCapital_label_en-US" xlink:label="lab_ifrs-full_IssuedCapital" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issued capital</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IssuedCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IssuedCapital" xlink:to="lab_ifrs-full_IssuedCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementLineItems_61c590ec-39c8-4de5-b96a-db30fe730789_terseLabel_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management [Line Items]</link:label>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementLineItems_label_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementLineItems" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management [Line Items]</link:label>
    <link:label id="lab_ptv_CapitalAndFinancialRiskManagementLineItems_documentation_en-US" xlink:label="lab_ptv_CapitalAndFinancialRiskManagementLineItems" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Capital And Financial Risk Management</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_CapitalAndFinancialRiskManagementLineItems" xlink:href="ptv-20221231.xsd#ptv_CapitalAndFinancialRiskManagementLineItems"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_CapitalAndFinancialRiskManagementLineItems" xlink:to="lab_ptv_CapitalAndFinancialRiskManagementLineItems" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_IssuanceOfWarrants_39993024-4376-41ed-ad56-81abfab4bf3f_terseLabel_en-US" xlink:label="lab_ptv_IssuanceOfWarrants" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of warrants in subsidiary</link:label>
    <link:label id="lab_ptv_IssuanceOfWarrants_label_en-US" xlink:label="lab_ptv_IssuanceOfWarrants" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of warrants</link:label>
    <link:label id="lab_ptv_IssuanceOfWarrants_documentation_en-US" xlink:label="lab_ptv_IssuanceOfWarrants" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of warrants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_IssuanceOfWarrants" xlink:href="ptv-20221231.xsd#ptv_IssuanceOfWarrants"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_IssuanceOfWarrants" xlink:to="lab_ptv_IssuanceOfWarrants" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_SignificantInvestmentsInAssociatesAxis_58837d0f-eaee-447b-b70f-da08066af6fb_terseLabel_en-US" xlink:label="lab_ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Associates [axis]</link:label>
    <link:label id="lab_ifrs-full_SignificantInvestmentsInAssociatesAxis_label_en-US" xlink:label="lab_ifrs-full_SignificantInvestmentsInAssociatesAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Associates [axis]</link:label>
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    <link:label id="lab_ifrs-full_EquityAndLiabilitiesAbstract_39051285-3749-431f-95da-9357c46cc1d6_terseLabel_en-US" xlink:label="lab_ifrs-full_EquityAndLiabilitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity and liabilities</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory_1c8512ed-1a59-416b-83f8-295cea7b03fa_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForFunctionalCurrencyExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Functional and Presentation Currency</link:label>
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    <link:label id="lab_ifrs-full_TradeAndOtherCurrentPayables_093d1772-eb61-4239-8672-de0fc4412865_terseLabel_en-US" xlink:label="lab_ifrs-full_TradeAndOtherCurrentPayables" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade and other payables</link:label>
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    <link:label id="lab_ifrs-full_MergerReserve_64a1dfbd-fc42-49f2-9806-e94108cf48a1_terseLabel_en-US" xlink:label="lab_ifrs-full_MergerReserve" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Merger reserve</link:label>
    <link:label id="lab_ifrs-full_MergerReserve_label_en-US" xlink:label="lab_ifrs-full_MergerReserve" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Merger reserve</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MergerReserve" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_MergerReserve"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_MergerReserve" xlink:to="lab_ifrs-full_MergerReserve" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GeneralAndAdministrativeExpense_6406b515-e67b-4032-91d3-6d999603789a_negatedLabel_en-US" xlink:label="lab_ifrs-full_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative expenses</link:label>
    <link:label id="lab_ifrs-full_GeneralAndAdministrativeExpense_e2be2a43-1ad5-4625-9a36-79322112d731_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative expenses</link:label>
    <link:label id="lab_ifrs-full_GeneralAndAdministrativeExpense_9476d225-56fd-478c-a232-b64b09978525_terseLabel_en-US" xlink:label="lab_ifrs-full_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative expenses</link:label>
    <link:label id="lab_ifrs-full_GeneralAndAdministrativeExpense_label_en-US" xlink:label="lab_ifrs-full_GeneralAndAdministrativeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">General and administrative expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeneralAndAdministrativeExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_GeneralAndAdministrativeExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GeneralAndAdministrativeExpense" xlink:to="lab_ifrs-full_GeneralAndAdministrativeExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TaxLossesAndTaxCreditsCarryforwardsTable_4e8d0a5c-7284-49b5-94d9-aa6d5077d98f_terseLabel_en-US" xlink:label="lab_ptv_TaxLossesAndTaxCreditsCarryforwardsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax losses and tax credits carryforwards [Table]</link:label>
    <link:label id="lab_ptv_TaxLossesAndTaxCreditsCarryforwardsTable_label_en-US" xlink:label="lab_ptv_TaxLossesAndTaxCreditsCarryforwardsTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax losses and tax credits carryforwards [Table]</link:label>
    <link:label id="lab_ptv_TaxLossesAndTaxCreditsCarryforwardsTable_documentation_en-US" xlink:label="lab_ptv_TaxLossesAndTaxCreditsCarryforwardsTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax losses and tax credits carryforwards [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TaxLossesAndTaxCreditsCarryforwardsTable" xlink:href="ptv-20221231.xsd#ptv_TaxLossesAndTaxCreditsCarryforwardsTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TaxLossesAndTaxCreditsCarryforwardsTable" xlink:to="lab_ptv_TaxLossesAndTaxCreditsCarryforwardsTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange_5c73fa1f-0c95-4a0f-ad92-84a402d28180_terseLabel_en-US" xlink:label="lab_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gelesis Earn out shares received in SPAC exchange</link:label>
    <link:label id="lab_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange_label_en-US" xlink:label="lab_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Investments, Fair Value Of Earnout Shares Received From SPAC Exchange</link:label>
    <link:label id="lab_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange_documentation_en-US" xlink:label="lab_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Financial Investments, Fair Value Of Earnout Shares Received From SPAC Exchange</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" xlink:href="ptv-20221231.xsd#ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" xlink:to="lab_ptv_FinancialInvestmentsFairValueOfEarnoutSharesReceivedFromSPACExchange" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BottomOfRangeMember_1594229d-b899-476d-b5d2-b79654ff0cd7_terseLabel_en-US" xlink:label="lab_ifrs-full_BottomOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bottom of range</link:label>
    <link:label id="lab_ifrs-full_BottomOfRangeMember_label_en-US" xlink:label="lab_ifrs-full_BottomOfRangeMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Bottom of range [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BottomOfRangeMember" xlink:to="lab_ifrs-full_BottomOfRangeMember" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine2_64a6aec3-8c11-444e-b195-69a46bd7a3ca_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine2_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Two</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine2"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine2" xlink:to="lab_dei_EntityAddressAddressLine2" xlink:type="arc" order="1"/>
    <link:label id="lab_dei_EntityAddressAddressLine1_93b45e89-2d64-4ca2-9055-cb8915c11591_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine1"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1" xlink:to="lab_dei_EntityAddressAddressLine1" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory_b3f70a56-fe0e-4cb9-ae83-5bdc7e27ab18_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Accounting Policies</link:label>
    <link:label id="lab_ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory_label_en-US" xlink:label="lab_ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of significant accounting policies [text block]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:to="lab_ifrs-full_DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate_edad256f-ff08-4030-9ada-8226deae0495_terseLabel_en-US" xlink:label="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on dilution of ownership interest in associate</link:label>
    <link:label id="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate_57d880ab-80b1-4ca8-9da2-447e6c824508_negatedTerseLabel_en-US" xlink:label="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain on dilution of ownership interest in associate</link:label>
    <link:label id="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate_label_en-US" xlink:label="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (Loss) Recognized On Dilution Of Ownership Interest In Associate</link:label>
    <link:label id="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate_documentation_en-US" xlink:label="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (Loss) Recognized On Dilution Of Ownership Interest In Associate</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate" xlink:href="ptv-20221231.xsd#ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate" xlink:to="lab_ptv_GainLossRecognizedOnDilutionOfOwnershipInterestInAssociate" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_8d4eaab1-78cd-400d-a3d6-0643edfcd84f_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-current assets</link:label>
    <link:label id="lab_ifrs-full_OtherNoncurrentAssets_label_en-US" xlink:label="lab_ifrs-full_OtherNoncurrentAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other non-current assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_OtherNoncurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_OtherNoncurrentAssets" xlink:to="lab_ifrs-full_OtherNoncurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_BorrowingsOther_89911cf4-0603-42a3-8845-2bf2e3aabafe_negatedTerseLabel_en-US" xlink:label="lab_ptv_BorrowingsOther" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other</link:label>
    <link:label id="lab_ptv_BorrowingsOther_label_en-US" xlink:label="lab_ptv_BorrowingsOther" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, other</link:label>
    <link:label id="lab_ptv_BorrowingsOther_documentation_en-US" xlink:label="lab_ptv_BorrowingsOther" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings, other</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_BorrowingsOther" xlink:href="ptv-20221231.xsd#ptv_BorrowingsOther"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_BorrowingsOther" xlink:to="lab_ptv_BorrowingsOther" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward_dea2f781-7d15-442c-ae2c-a80a91adf0d3_terseLabel_en-US" xlink:label="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in the value of subsidiary preferred shares [Roll Forward]</link:label>
    <link:label id="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward_label_en-US" xlink:label="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in the value of subsidiary preferred shares [Roll Forward]</link:label>
    <link:label id="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward_documentation_en-US" xlink:label="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Changes in the value of subsidiary preferred shares</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" xlink:href="ptv-20221231.xsd#ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" xlink:to="lab_ptv_ChangesInTheValueOfSubsidiaryPreferredSharesRollForward" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_SubsidiaryNotesPayableLoansTable_a3de7bb0-e230-4b9b-9b10-2e5eb814321c_terseLabel_en-US" xlink:label="lab_ptv_SubsidiaryNotesPayableLoansTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Notes Payable - Loans [Table]</link:label>
    <link:label id="lab_ptv_SubsidiaryNotesPayableLoansTable_label_en-US" xlink:label="lab_ptv_SubsidiaryNotesPayableLoansTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Notes Payable - Loans [Table]</link:label>
    <link:label id="lab_ptv_SubsidiaryNotesPayableLoansTable_documentation_en-US" xlink:label="lab_ptv_SubsidiaryNotesPayableLoansTable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Subsidiary Notes Payable - Loans [Table]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_SubsidiaryNotesPayableLoansTable" xlink:href="ptv-20221231.xsd#ptv_SubsidiaryNotesPayableLoansTable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_SubsidiaryNotesPayableLoansTable" xlink:to="lab_ptv_SubsidiaryNotesPayableLoansTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ptv_TradeReceivablesIncomeTaxReceivable_b82950c5-f684-401d-b303-39cb325115f6_terseLabel_en-US" xlink:label="lab_ptv_TradeReceivablesIncomeTaxReceivable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax receivable &#8211; current</link:label>
    <link:label id="lab_ptv_TradeReceivablesIncomeTaxReceivable_label_en-US" xlink:label="lab_ptv_TradeReceivablesIncomeTaxReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade receivables, income tax receivable</link:label>
    <link:label id="lab_ptv_TradeReceivablesIncomeTaxReceivable_documentation_en-US" xlink:label="lab_ptv_TradeReceivablesIncomeTaxReceivable" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Trade receivables, income tax receivable</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_TradeReceivablesIncomeTaxReceivable" xlink:href="ptv-20221231.xsd#ptv_TradeReceivablesIncomeTaxReceivable"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_TradeReceivablesIncomeTaxReceivable" xlink:to="lab_ptv_TradeReceivablesIncomeTaxReceivable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_BorrowingsByNameMember_85fa4abc-379b-4ce4-824e-a4a5047f9642_terseLabel_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings by name</link:label>
    <link:label id="lab_ifrs-full_BorrowingsByNameMember_label_en-US" xlink:label="lab_ifrs-full_BorrowingsByNameMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Borrowings by name [member]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_BorrowingsByNameMember" xlink:to="lab_ifrs-full_BorrowingsByNameMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromNoncurrentBorrowings_f8b4f61e-2488-445a-8e3f-b3cb04871ae5_terseLabel_en-US" xlink:label="lab_ifrs-full_ProceedsFromNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Issuance of long term loan</link:label>
    <link:label id="lab_ifrs-full_ProceedsFromNoncurrentBorrowings_label_en-US" xlink:label="lab_ifrs-full_ProceedsFromNoncurrentBorrowings" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from non-current borrowings</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory_00ecf8f5-196a-437b-b8ba-47db0614565a_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfRevenueFromContractsWithCustomersExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of revenue</link:label>
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    <link:label id="lab_ifrs-full_WagesAndSalaries_c5661180-87ad-4e9c-933f-52cf395b7c23_terseLabel_en-US" xlink:label="lab_ifrs-full_WagesAndSalaries" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Salaries and wages</link:label>
    <link:label id="lab_ifrs-full_WagesAndSalaries_label_en-US" xlink:label="lab_ifrs-full_WagesAndSalaries" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Wages and salaries</link:label>
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    <link:label id="lab_ptv_SummaryOfSubsidiaryPreferredSharesBalancesTableTextBlock_cb431584-5f98-4ad6-8e20-ed78c13025ae_terseLabel_en-US" xlink:label="lab_ptv_SummaryOfSubsidiaryPreferredSharesBalancesTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of subsidiary preferred share balances</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_SummaryOfSubsidiaryPreferredSharesBalancesTableTextBlock" xlink:href="ptv-20221231.xsd#ptv_SummaryOfSubsidiaryPreferredSharesBalancesTableTextBlock"/>
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    <link:label id="lab_ptv_NonControllingInterestsAndOptionsIssuedToThirdParties_94da9dbb-efc4-481a-b218-2adb71befbed_terseLabel_en-US" xlink:label="lab_ptv_NonControllingInterestsAndOptionsIssuedToThirdParties" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non controlling interests and options issued to third parties</link:label>
    <link:label id="lab_ptv_NonControllingInterestsAndOptionsIssuedToThirdParties_label_en-US" xlink:label="lab_ptv_NonControllingInterestsAndOptionsIssuedToThirdParties" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non controlling interests and options issued to third parties</link:label>
    <link:label id="lab_ptv_NonControllingInterestsAndOptionsIssuedToThirdParties_documentation_en-US" xlink:label="lab_ptv_NonControllingInterestsAndOptionsIssuedToThirdParties" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non controlling interests and options issued to third parties</link:label>
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    <link:label id="lab_ifrs-full_OtherOperatingIncomeExpense_1b5f9c65-f71e-46e7-a087-bab5ce269db4_totalLabel_en-US" xlink:label="lab_ifrs-full_OtherOperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other income/(expense)</link:label>
    <link:label id="lab_ifrs-full_OtherOperatingIncomeExpense_label_en-US" xlink:label="lab_ifrs-full_OtherOperatingIncomeExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other operating income (expense)</link:label>
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    <link:label id="lab_ifrs-full_ProfitLoss_0e2afe76-dd83-4c43-93a6-a9d0878d5206_totalLabel_en-US" xlink:label="lab_ifrs-full_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income/(Loss) for the year</link:label>
    <link:label id="lab_ifrs-full_ProfitLoss_56edac33-143c-4a88-8a72-8466173fcefc_verboseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Net income/(loss)</link:label>
    <link:label id="lab_ifrs-full_ProfitLoss_5cb5e1b9-4ee7-48a7-9cff-b220ddc57eb4_terseLabel_en-US" xlink:label="lab_ifrs-full_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income/(loss) for the year</link:label>
    <link:label id="lab_ifrs-full_ProfitLoss_label_en-US" xlink:label="lab_ifrs-full_ProfitLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Profit (loss)</link:label>
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    <link:label id="lab_ptv_PreferredShareWarrantsMember_6c1f9094-d347-4eaf-92de-511de4d7f5cc_terseLabel_en-US" xlink:label="lab_ptv_PreferredShareWarrantsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred share warrants</link:label>
    <link:label id="lab_ptv_PreferredShareWarrantsMember_label_en-US" xlink:label="lab_ptv_PreferredShareWarrantsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred share warrants [Member]</link:label>
    <link:label id="lab_ptv_PreferredShareWarrantsMember_documentation_en-US" xlink:label="lab_ptv_PreferredShareWarrantsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Preferred share warrants</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ptv_PreferredShareWarrantsMember" xlink:href="ptv-20221231.xsd#ptv_PreferredShareWarrantsMember"/>
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    <link:label id="lab_ifrs-full_MajorCustomersAxis_79dfa370-19ef-48f0-b8f6-2b9ef17f273d_terseLabel_en-US" xlink:label="lab_ifrs-full_MajorCustomersAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Customers over 10% of revenue</link:label>
    <link:label id="lab_ifrs-full_MajorCustomersAxis_3ae1d898-fd08-459f-bcae-9b096a940665_verboseLabel_en-US" xlink:label="lab_ifrs-full_MajorCustomersAxis" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Major customers [axis]</link:label>
    <link:label id="lab_ifrs-full_MajorCustomersAxis_label_en-US" xlink:label="lab_ifrs-full_MajorCustomersAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Major customers [axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MajorCustomersAxis" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_MajorCustomersAxis"/>
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    <link:label id="lab_ptv_NotesPayableLineItems_c2770d69-f17e-4c54-b262-8e32e0092d49_terseLabel_en-US" xlink:label="lab_ptv_NotesPayableLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Notes Payable [Line Items]</link:label>
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    <link:label id="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities_211acb8d-7e7e-47e0-bc2e-73257ca3b53a_negatedLabel_en-US" xlink:label="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest paid</link:label>
    <link:label id="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities_label_en-US" xlink:label="lab_ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest paid, classified as operating activities</link:label>
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    <link:label id="lab_ptv_DeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate_7e5ffa6c-60ec-412d-9cd1-03821ee4c8bf_negatedTerseLabel_en-US" xlink:label="lab_ptv_DeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Sonde Deconsolidation</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_ptv_DeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate" xlink:href="ptv-20221231.xsd#ptv_DeconsolidationAdjustmentsReconciliationOfEffectiveTaxRate"/>
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    <link:label id="lab_ifrs-full_DilutedEarningsLossPerShare_1c79cba1-e94a-4ef8-bc5f-af1ae5bc18eb_terseLabel_en-US" xlink:label="lab_ifrs-full_DilutedEarningsLossPerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Diluted earnings/ (loss) per share (in dollars per share)</link:label>
    <link:label id="lab_ifrs-full_DilutedEarningsLossPerShare_label_en-US" xlink:label="lab_ifrs-full_DilutedEarningsLossPerShare" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Diluted earnings (loss) per share</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutedEarningsLossPerShare" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_DilutedEarningsLossPerShare"/>
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    <link:label id="lab_ifrs-full_ConsiderationPaidReceived_3bdd8334-f2d0-4dce-9e71-aa663a042ba0_terseLabel_en-US" xlink:label="lab_ifrs-full_ConsiderationPaidReceived" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration paid (received)</link:label>
    <link:label id="lab_ifrs-full_ConsiderationPaidReceived_label_en-US" xlink:label="lab_ifrs-full_ConsiderationPaidReceived" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Consideration paid (received)</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConsiderationPaidReceived" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_ConsiderationPaidReceived"/>
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    <link:label id="lab_ptv_InterestExpenseReconciliationOfEffectiveTaxRate_documentation_en-US" xlink:label="lab_ptv_InterestExpenseReconciliationOfEffectiveTaxRate" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest expense, reconciliation of effective tax rate</link:label>
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    <link:label id="lab_ptv_EarningslossPerShareAbstract_91242fec-144e-471d-874b-a479424a19c4_terseLabel_en-US" xlink:label="lab_ptv_EarningslossPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings/(loss) per share</link:label>
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    <link:label id="lab_ptv_EarningslossPerShareAbstract_documentation_en-US" xlink:label="lab_ptv_EarningslossPerShareAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Earnings/(loss) per share</link:label>
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    <link:label id="lab_ptv_TotalShareBasedPaymentsExpenseCategoryMember_fcbf188d-bd89-4410-9a2a-26cfbe619f6d_terseLabel_en-US" xlink:label="lab_ptv_TotalShareBasedPaymentsExpenseCategoryMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total share-based payments expense category</link:label>
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    <link:label id="lab_ptv_TotalShareBasedPaymentsExpenseCategoryMember_documentation_en-US" xlink:label="lab_ptv_TotalShareBasedPaymentsExpenseCategoryMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total Share-based Payments Expense Category</link:label>
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    <link:label id="lab_ifrs-full_ClassesOfShareCapitalMember_6c16572e-43e9-4205-b7a6-981aacd8835c_terseLabel_en-US" xlink:label="lab_ifrs-full_ClassesOfShareCapitalMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Share capital</link:label>
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    <link:label id="lab_ptv_DisclosureOfEquityTextBlock_31e83654-763d-4fc8-b0c8-6fd8a7ceacc1_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfEquityTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Equity</link:label>
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    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract_f8aeab1b-95dc-4b76-992f-b0a2c85f1ccf_terseLabel_en-US" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Cash flows from operating activities</link:label>
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    <link:label id="lab_ptv_ShortTermAndLongTermOfLeaseReceivablesTable_ce26f2fa-fb4f-4841-99b6-925db42b9726_terseLabel_en-US" xlink:label="lab_ptv_ShortTermAndLongTermOfLeaseReceivablesTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term and Long-term of lease receivables [Table]</link:label>
    <link:label id="lab_ptv_ShortTermAndLongTermOfLeaseReceivablesTable_label_en-US" xlink:label="lab_ptv_ShortTermAndLongTermOfLeaseReceivablesTable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Short-term and Long-term of lease receivables [Table]</link:label>
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    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ptv_ShortTermAndLongTermOfLeaseReceivablesTable" xlink:to="lab_ptv_ShortTermAndLongTermOfLeaseReceivablesTable" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_OrdinarySharesMember_5345630a-bf98-47d5-b368-ff44d6f79b00_terseLabel_en-US" xlink:label="lab_ifrs-full_OrdinarySharesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common</link:label>
    <link:label id="lab_ifrs-full_OrdinarySharesMember_label_en-US" xlink:label="lab_ifrs-full_OrdinarySharesMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Ordinary shares [member]</link:label>
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    <link:label id="lab_ifrs-full_OtherReservesMember_b3da3bff-54eb-479d-b62d-0dcde90de988_terseLabel_en-US" xlink:label="lab_ifrs-full_OtherReservesMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other reserve</link:label>
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    <link:label id="lab_ptv_PerformanceSharePlanLineItems_8d9af8c9-5066-4a87-a481-e4368fd69a1b_terseLabel_en-US" xlink:label="lab_ptv_PerformanceSharePlanLineItems" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Performance Share Plan [Line Items]</link:label>
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    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_79f3da21-bf70-4a8e-a97d-d17f0ef057f2_negatedTerseLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Taxation</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_a6a1916e-e54b-49c6-ad13-912b255ac8ad_terseLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense/(benefit)</link:label>
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    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_dda70447-a0f3-4e51-804c-418c4708e500_totalLabel_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax expense/(benefit)</link:label>
    <link:label id="lab_ifrs-full_IncomeTaxExpenseContinuingOperations_label_en-US" xlink:label="lab_ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Tax expense (income)</link:label>
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    <link:label id="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable_cbf00cb3-789f-4c75-88fd-12c7426fa1c0_terseLabel_en-US" xlink:label="lab_ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsTable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of Maturity Analysis of Operating Lease Payments [Table]</link:label>
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    <link:label id="lab_ptv_TradePayablesIncomeTaxPayable_a554102f-52f8-429d-9327-8c530ca941c1_terseLabel_en-US" xlink:label="lab_ptv_TradePayablesIncomeTaxPayable" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income tax payable</link:label>
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    <link:label id="lab_ptv_OtherIncomeexpenseAbstract_d99d44dc-8a0d-4d5c-ac4d-099ed30f3608_terseLabel_en-US" xlink:label="lab_ptv_OtherIncomeexpenseAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other income/(expense):</link:label>
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    <link:label id="lab_ptv_OtherIncomeexpenseAbstract_documentation_en-US" xlink:label="lab_ptv_OtherIncomeexpenseAbstract" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Other income/(expense)</link:label>
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    <link:label id="lab_ptv_GainLossOnDerivativeAssetsRecognizedThroughProfitOrLoss_3ae6a939-5c44-46f0-ad58-3b22826b8249_terseLabel_en-US" xlink:label="lab_ptv_GainLossOnDerivativeAssetsRecognizedThroughProfitOrLoss" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Gain (loss) on derivative assets recognized through profit or loss</link:label>
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    <link:label id="lab_ptv_DisclosureOfShortTermAndLongTermPortionOfLeaseLiabilityTableTextBlock_f4c5c918-03c4-4413-8d2e-65543b57a970_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfShortTermAndLongTermPortionOfLeaseLiabilityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of short-term and long-term portion of lease liability</link:label>
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    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment_e8248c59-f98a-40f5-88ca-e64d05b9df94_terseLabel_en-US" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransfersFromConstructionInProgressPropertyPlantAndEquipment" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reclassifications</link:label>
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    <link:label id="lab_ptv_DisclosureOfShortTermAndLongTermPortionOfLeaseReceivableTableTextBlock_3168170b-c188-44a8-8583-ba7b024b6728_terseLabel_en-US" xlink:label="lab_ptv_DisclosureOfShortTermAndLongTermPortionOfLeaseReceivableTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Disclosure of short-term and long-term portion of lease receivable</link:label>
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    <link:label id="lab_ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory_45865a0e-eb0f-467a-b65f-eb2c1c83ac51_terseLabel_en-US" xlink:label="lab_ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Development Costs</link:label>
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