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<xbrli:xbrl xmlns:in-capmkt="https://www.sebi.gov.in/xbrl/2024-05-31/in-capmkt" xmlns:in-capmkt-ent="https://www.sebi.gov.in/xbrl/Notice_Of_Shareholders_Meeting/2024-05-31/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="https://www.sebi.gov.in/xbrl/Notice_Of_Shareholders_Meeting/2024-05-31/in-capmkt-roles" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" 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.xbrl.org/2003/XLink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2024-05-31.xsd"/><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-08-05</xbrli:instant></xbrli:period></xbrli:context><xbrli:context id="D_DetailofResolution1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-08-05</xbrli:startDate><xbrli:endDate>2026-08-05</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResolutionOrAgendaAxis"><in-capmkt:ResolutionOrAgendaDomain>ResolutionOrAgendaDomain1</in-capmkt:ResolutionOrAgendaDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_DetailofResolution1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-08-05</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResolutionOrAgendaAxis"><in-capmkt:ResolutionOrAgendaDomain>ResolutionOrAgendaDomain1</in-capmkt:ResolutionOrAgendaDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_DetailofResolution2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-08-05</xbrli:startDate><xbrli:endDate>2026-08-05</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResolutionOrAgendaAxis"><in-capmkt:ResolutionOrAgendaDomain>ResolutionOrAgendaDomain2</in-capmkt:ResolutionOrAgendaDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_DetailofResolution2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-08-05</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResolutionOrAgendaAxis"><in-capmkt:ResolutionOrAgendaDomain>ResolutionOrAgendaDomain2</in-capmkt:ResolutionOrAgendaDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_DetailofResolution3"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-08-05</xbrli:startDate><xbrli:endDate>2026-08-05</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResolutionOrAgendaAxis"><in-capmkt:ResolutionOrAgendaDomain>ResolutionOrAgendaDomain3</in-capmkt:ResolutionOrAgendaDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_DetailofResolution3"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">506222</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-08-05</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResolutionOrAgendaAxis"><in-capmkt:ResolutionOrAgendaDomain>ResolutionOrAgendaDomain3</in-capmkt:ResolutionOrAgendaDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:unit id="pure"><xbrli:measure>xbrli:pure</xbrli:measure></xbrli:unit><in-capmkt:NameOfTheCompany contextRef="MainI">Styrenix Performance Materials Limited</in-capmkt:NameOfTheCompany><in-capmkt:NSESymbol contextRef="MainI">STYRENIX</in-capmkt:NSESymbol><in-capmkt:TypeOfAnnouncement contextRef="MainI">New</in-capmkt:TypeOfAnnouncement><in-capmkt:DateOfOccurrenceOfEvent contextRef="MainI">2026-08-27</in-capmkt:DateOfOccurrenceOfEvent><in-capmkt:TimeOfOccurrenceOfEvent contextRef="MainI">11:30:00</in-capmkt:TimeOfOccurrenceOfEvent><in-capmkt:DateOfReport contextRef="MainI">2026-08-05</in-capmkt:DateOfReport><in-capmkt:EventForNoticeOfShareholdersMeeting contextRef="MainI">Annual General Meeting</in-capmkt:EventForNoticeOfShareholdersMeeting><in-capmkt:ModeOfShareholdersMeeting contextRef="MainI">Video Conference (VC) or Other Audio-Visual Means (OAVM)</in-capmkt:ModeOfShareholdersMeeting><in-capmkt:NumberOfShareholdersMeeting contextRef="MainI">53rd Annual General Meeting</in-capmkt:NumberOfShareholdersMeeting><in-capmkt:DayOfShareholdersMeeting contextRef="MainI">Thursday</in-capmkt:DayOfShareholdersMeeting><in-capmkt:DateOfShareholdersMeeting contextRef="MainI">2026-08-27</in-capmkt:DateOfShareholdersMeeting><in-capmkt:ShareholdersMeetingCommencementTime contextRef="MainI">11:30:00</in-capmkt:ShareholdersMeetingCommencementTime><in-capmkt:PlaceOfShareholdersMeeting contextRef="MainI">9th Floor, “Shiva”, Sarabhai Complex, Dr. Vikram Sarabhai
Marg, Vadiwadi, Vadodara – 390023.</in-capmkt:PlaceOfShareholdersMeeting><in-capmkt:NumberOfAgendaOrBusinessToBeTransacted contextRef="MainI" unitRef="pure" decimals="0">3</in-capmkt:NumberOfAgendaOrBusinessToBeTransacted><in-capmkt:TypeOfResolution contextRef="I_DetailofResolution1">Ordinary Resolution</in-capmkt:TypeOfResolution><in-capmkt:CategoryOfResolution contextRef="I_DetailofResolution1">Adoption of Financial Statements</in-capmkt:CategoryOfResolution><in-capmkt:BriefDetailsOfResolution contextRef="D_DetailofResolution1">To consider and adopt the Audited Standalone and Consolidated Financial Statements of the Company for the financial year ended March 31, 2026, together
with the Reports of the Board of Directors and the
Auditors thereon.</in-capmkt:BriefDetailsOfResolution><in-capmkt:TypeOfResolution contextRef="I_DetailofResolution2">Ordinary Resolution</in-capmkt:TypeOfResolution><in-capmkt:CategoryOfResolution contextRef="I_DetailofResolution2">Appointment/Re-appointment/Removal/Ratification/Retirement/Remuneration</in-capmkt:CategoryOfResolution><in-capmkt:SubCategoryOfResolution contextRef="I_DetailofResolution2">Retirement by rotation</in-capmkt:SubCategoryOfResolution><in-capmkt:BriefDetailsOfResolution contextRef="D_DetailofResolution2">To appoint a Director in place of Mr. Vishal Rakesh Agrawal (DIN: 00056800), who retires by rotation, and being eligible, offers himself for re-appointment as a
Director liable to retire by rotation.</in-capmkt:BriefDetailsOfResolution><in-capmkt:DesignationOfDesignatedPerson contextRef="I_DetailofResolution2">Executive Director</in-capmkt:DesignationOfDesignatedPerson><in-capmkt:NameOfDesignatedPerson contextRef="D_DetailofResolution2">Mr. Vishal Rakesh
Agrawal</in-capmkt:NameOfDesignatedPerson><in-capmkt:DirectorIdentificationNumberOfDirector contextRef="D_DetailofResolution2">00056800</in-capmkt:DirectorIdentificationNumberOfDirector><in-capmkt:DateOfStartOfTenure contextRef="D_DetailofResolution2">2022-11-17</in-capmkt:DateOfStartOfTenure><in-capmkt:DateOfEndOfTenure contextRef="D_DetailofResolution2">2027-11-16</in-capmkt:DateOfEndOfTenure><in-capmkt:TypeOfResolution contextRef="I_DetailofResolution3">Ordinary Resolution</in-capmkt:TypeOfResolution><in-capmkt:CategoryOfResolution contextRef="I_DetailofResolution3">Appointment/Re-appointment/Removal/Ratification/Retirement/Remuneration</in-capmkt:CategoryOfResolution><in-capmkt:SubCategoryOfResolution contextRef="I_DetailofResolution3">Ratification</in-capmkt:SubCategoryOfResolution><in-capmkt:BriefDetailsOfResolution contextRef="D_DetailofResolution3">To ratify the payment of remuneration to the Cost Auditors of the Company for the Financial Year 2026-27.</in-capmkt:BriefDetailsOfResolution><in-capmkt:DesignationOfDesignatedPerson contextRef="I_DetailofResolution3">Others</in-capmkt:DesignationOfDesignatedPerson><in-capmkt:DetailsOfOtherDesignation contextRef="D_DetailofResolution3">Cost Accountants</in-capmkt:DetailsOfOtherDesignation><in-capmkt:NameOfDesignatedPerson contextRef="D_DetailofResolution3">M/s. Kailash Sankhlecha and Associates</in-capmkt:NameOfDesignatedPerson><in-capmkt:DateOfStartOfTenure contextRef="D_DetailofResolution3">2026-04-01</in-capmkt:DateOfStartOfTenure><in-capmkt:DateOfEndOfTenure contextRef="D_DetailofResolution3">2027-03-31</in-capmkt:DateOfEndOfTenure></xbrli:xbrl>
