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<!--AIATOP V1.0 (24-04-2026)-->
<xbrli:xbrl xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2026-03-31/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/Action_Initiation_Or_Action_Taken_Or_Order_Passed/2026-03-31/in-capmkt/in-capmkt-ent" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:in-capmkt-types="http://www.sebi.gov.in/xbrl/2026-03-31/in-capmkt-types" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xl="http://www.w3.org/1999/xlink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2026-03-31.xsd"/><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-11-13</xbrli:instant></xbrli:period></xbrli:context><xbrli:context id="I_ActionsTaken1"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-11-13</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ActionsTakenOrOrdersPassedAxis"><in-capmkt:ActionsTakenOrOrdersPassedDomain>ActionsTakenOrOrdersPassedDomain1</in-capmkt:ActionsTakenOrOrdersPassedDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_ActionsTaken1_PersonsAgainstWhomActionsTaken1"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-11-13</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ActionsTakenOrOrdersPassedAxis"><in-capmkt:ActionsTakenOrOrdersPassedDomain>ActionsTakenOrOrdersPassedDomain1</in-capmkt:ActionsTakenOrOrdersPassedDomain></xbrldi:typedMember><xbrldi:typedMember dimension="in-capmkt:PersonsAgainstWhomActionsTakenOrOrdersPassedAxis"><in-capmkt:PersonsAgainstWhomActionsTakenOrOrdersPassedDomain>PersonsAgainstWhomActionsTakenOrOrdersPassedDomain1</in-capmkt:PersonsAgainstWhomActionsTakenOrOrdersPassedDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_Signatories1"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-11-13</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:SignatoriesAxis"><in-capmkt:SignatoriesDomain>SignatoriesDomain1</in-capmkt:SignatoriesDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:unit id="pure"><xbrli:measure>xbrli:pure</xbrli:measure></xbrli:unit><in-capmkt:NSESymbol contextRef="MainI">STYRENIX</in-capmkt:NSESymbol><in-capmkt:NameOfTheCompany contextRef="MainI">STYRENIX PERFORMANCE MATERIALS LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:ScripCode contextRef="MainI">506222</in-capmkt:ScripCode><in-capmkt:MSEISymbol contextRef="MainI">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="MainI">INE189B01011</in-capmkt:ISIN><in-capmkt:TypeOfAnnouncement contextRef="MainI">New</in-capmkt:TypeOfAnnouncement><in-capmkt:TypeOfEvent contextRef="MainI">Action(s) taken or orders passed (sub-para 20)</in-capmkt:TypeOfEvent><in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfTheBoardMeeting contextRef="MainI">false</in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfTheBoardMeeting><in-capmkt:DateOfOccurrenceOfEventOrInformation contextRef="MainI">2026-11-12</in-capmkt:DateOfOccurrenceOfEventOrInformation><in-capmkt:TimeOfOccurrenceOfEventOrInformation contextRef="MainI">11:45:00</in-capmkt:TimeOfOccurrenceOfEventOrInformation><in-capmkt:DateOfReport contextRef="MainI">2026-11-13</in-capmkt:DateOfReport><in-capmkt:TypeOfActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">Any other similar action(s)</in-capmkt:TypeOfActionsTakenOrOrdersPassed><in-capmkt:DetailsOfAnyOtherSimilarActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">The Hon’ble Income Tax Appellate Tribunal (“ITAT”) vide its order, has allowed the appeal filed by the Company and deleted the tax demand of INR 13.28 crores raised by the Assessment Unit for Assessment Year 2022-23.</in-capmkt:DetailsOfAnyOtherSimilarActionsTakenOrOrdersPassed><in-capmkt:ActionsTakenOrOrdersPassedBy contextRef="I_ActionsTaken1">Statutory Authority</in-capmkt:ActionsTakenOrOrdersPassedBy><in-capmkt:NameOfAuthorityFromWhomActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">Income Tax Appellate Tribunal (“ITAT”), Ahemdabad</in-capmkt:NameOfAuthorityFromWhomActionsTakenOrOrdersPassed><in-capmkt:NumberOfPersonsAgainstWhomActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1" unitRef="pure" decimals="0">1</in-capmkt:NumberOfPersonsAgainstWhomActionsTakenOrOrdersPassed><in-capmkt:ActionsTakenOrOrdersPassedAgainst contextRef="I_ActionsTaken1_PersonsAgainstWhomActionsTaken1">Listed Entity (Self)</in-capmkt:ActionsTakenOrOrdersPassedAgainst><in-capmkt:NameOfPersonAgainstWhomActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1_PersonsAgainstWhomActionsTaken1">STYRENIX PERFORMANCE MATERIALS LIMITED</in-capmkt:NameOfPersonAgainstWhomActionsTakenOrOrdersPassed><in-capmkt:TypeOfCommunicationReceivedForActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">Physical - by speed post</in-capmkt:TypeOfCommunicationReceivedForActionsTakenOrOrdersPassed><in-capmkt:NatureAndDetailsOfTheActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">The Hon’ble Income Tax Appellate Tribunal (“ITAT”) vide its order, has allowed the appeal filed by the Company and deleted the tax demand of INR 13.28 crores raised by the Assessment Unit for Assessment Year 2022-23.</in-capmkt:NatureAndDetailsOfTheActionsTakenOrOrdersPassed><in-capmkt:DateOfReceiptOfCommunicationReceivedForActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">2026-11-12</in-capmkt:DateOfReceiptOfCommunicationReceivedForActionsTakenOrOrdersPassed><in-capmkt:BriefDetailsOfTheMaterialContentsOfTheCommunicationReceivedForActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">The Hon’ble Income Tax Appellate Tribunal (“ITAT”) vide its order, has allowed the appeal filed by the Company and deleted the tax demand of INR 13.28 crores raised by the Assessment Unit for Assessment Year 2022-23.</in-capmkt:BriefDetailsOfTheMaterialContentsOfTheCommunicationReceivedForActionsTakenOrOrdersPassed><in-capmkt:PeriodForWhichCommunicationWouldBeApplicableForActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">Assessment Year 2022-23</in-capmkt:PeriodForWhichCommunicationWouldBeApplicableForActionsTakenOrOrdersPassed><in-capmkt:ExpectedImpactOfActionsTakenOnFinancialAndOperationalOrOtherActivitiesOfTheListedEntity contextRef="I_ActionsTaken1">Positive Impact: The aforesaid ITAT Order results in the deletion tax demand of INR 13.28 crores.</in-capmkt:ExpectedImpactOfActionsTakenOnFinancialAndOperationalOrOtherActivitiesOfTheListedEntity><in-capmkt:DetailsOfAnyAberrationsOrNonCompliancesOrViolationsOrContraventionsIdentifiedByTheAuthorityInTheCommunicationForActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">N.A</in-capmkt:DetailsOfAnyAberrationsOrNonCompliancesOrViolationsOrContraventionsIdentifiedByTheAuthorityInTheCommunicationForActionsTakenOrOrdersPassed><in-capmkt:DetailsOfAnyPenaltyOrRestrictionOrSanctionImposedPursuantToTheCommunicationForActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">N.A</in-capmkt:DetailsOfAnyPenaltyOrRestrictionOrSanctionImposedPursuantToTheCommunicationForActionsTakenOrOrdersPassed><in-capmkt:DetailsOfRegulatoryActionsOrSanctions contextRef="I_ActionsTaken1">N.A</in-capmkt:DetailsOfRegulatoryActionsOrSanctions><in-capmkt:ActionsTakenByListedCompanyWithRespectToTheCommunicationForActionsTakenOrOrdersPassed contextRef="I_ActionsTaken1">N.A.</in-capmkt:ActionsTakenByListedCompanyWithRespectToTheCommunicationForActionsTakenOrOrdersPassed><in-capmkt:NameOfTheSignatory contextRef="I_Signatories1">Chintan Doshi</in-capmkt:NameOfTheSignatory><in-capmkt:DesignationOfTheSignatory contextRef="I_Signatories1">Company Secretary</in-capmkt:DesignationOfTheSignatory><in-capmkt:DateOfOfTheSignatory contextRef="I_Signatories1">2026-11-13</in-capmkt:DateOfOfTheSignatory><in-capmkt:PlaceOfOfTheSignatory contextRef="I_Signatories1">Vadodara</in-capmkt:PlaceOfOfTheSignatory></xbrli:xbrl>
