<?xml version="1.0" encoding="UTF-8"?>
<!--ANNAgreement V1.0 (10-04-2026)-->
<xbrli:xbrl xmlns:in-capmkt="https://www.sebi.gov.in/xbrl/2024-04-30/in-capmkt" xmlns:in-capmkt-ent="https://www.sebi.gov.in/xbrl/Announcement_For_Agreements/2024-04-30/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="https://www.sebi.gov.in/xbrl/Announcement_For_Agreements/2024-04-30/in-capmkt-roles" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:in-capmkt-type="https://www.sebi.gov.in/xbrl/2024-04-30/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.xbrl.org/2003/XLink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2024-04-30.xsd"/><xbrli:context id="MainD"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-05-16</xbrli:startDate><xbrli:endDate>2026-05-16</xbrli:endDate></xbrli:period></xbrli:context><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-05-16</xbrli:instant></xbrli:period></xbrli:context><xbrli:context id="D_PartiesOfTheAgreement1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-05-16</xbrli:startDate><xbrli:endDate>2026-05-16</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain1</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_PartiesOfTheAgreement1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-05-16</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain1</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_PartiesOfTheAgreement2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-05-16</xbrli:startDate><xbrli:endDate>2026-05-16</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain2</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_PartiesOfTheAgreement2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-05-16</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain2</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_PartiesOfTheAgreement3"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-05-16</xbrli:startDate><xbrli:endDate>2026-05-16</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain3</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_PartiesOfTheAgreement3"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-05-16</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain3</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_PartiesOfTheAgreement4"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-05-16</xbrli:startDate><xbrli:endDate>2026-05-16</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain4</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_PartiesOfTheAgreement4"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">PRIMO</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-05-16</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:PartiesOfTheAgreementAxis"><in-capmkt:PartiesOfTheAgreementDomain>PartiesOfTheAgreementDomain4</in-capmkt:PartiesOfTheAgreementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:unit id="pure"><xbrli:measure>xbrli:pure</xbrli:measure></xbrli:unit><xbrli:unit id="shares"><xbrli:measure>xbrli:shares</xbrli:measure></xbrli:unit><xbrli:unit id="INRPerShare"><xbrli:divide><xbrli:unitNumerator><xbrli:measure>iso4217:INR</xbrli:measure></xbrli:unitNumerator><xbrli:unitDenominator><xbrli:measure>xbrli:shares</xbrli:measure></xbrli:unitDenominator></xbrli:divide></xbrli:unit><in-capmkt:NSESymbol contextRef="MainI">PRIMO</in-capmkt:NSESymbol><in-capmkt:NameOfTheCompany contextRef="MainI">PRIMO CHEMICALS LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:TypeOfAnnouncement contextRef="MainI">New</in-capmkt:TypeOfAnnouncement><in-capmkt:TypeOfAgreement contextRef="MainI">Shareholder agreements</in-capmkt:TypeOfAgreement><in-capmkt:StageOfAgreement contextRef="MainI">Execution of agreement</in-capmkt:StageOfAgreement><in-capmkt:AgreementsEnteredIntoBy contextRef="MainD">Listed Entity,Others</in-capmkt:AgreementsEnteredIntoBy><in-capmkt:DetailsOfOtherAgreementsEnteredIntoBy contextRef="MainD">The Share Subscription and Shareholders Agreement has been entered between the Listed entity, TPCS Private Limited i.e. the Special Purpose Vechicle and its Promoter Group i.e. Sun Photonics Private Limited and Apra Infrastructure Developers Private Limited.</in-capmkt:DetailsOfOtherAgreementsEnteredIntoBy><in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfBoardMeeting contextRef="MainD">false</in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfBoardMeeting><in-capmkt:DateOfOccurrenceOfEvent contextRef="MainI">2026-05-14</in-capmkt:DateOfOccurrenceOfEvent><in-capmkt:TimeOfOccurrenceOfEvent contextRef="MainD">21:30:00</in-capmkt:TimeOfOccurrenceOfEvent><in-capmkt:WhetherTheListedEntityIsPartyToTheAgreement contextRef="MainD">true</in-capmkt:WhetherTheListedEntityIsPartyToTheAgreement><in-capmkt:DateOfReport contextRef="MainI">2026-05-16</in-capmkt:DateOfReport><in-capmkt:DetailsOfExecutionOfAgreement contextRef="MainI">Enter into Share Subscription and Shareholders Agreement with TPCS Private Limited i.e. the Special Purpose Vechicle and its Promoter Group i.e Sun Photonics Private Limited and Apra Infrastructure Developers Private Limited for subscription of 26 percent equity shares of TPCS Private Limited i.e. the SPV for Developing, owning, operating and maintaining a 49.998 MW AC Solar Power Plant under captive mode on OPEX model in accordance with the open access and captive power policy under prevailing electricity laws and regulations.</in-capmkt:DetailsOfExecutionOfAgreement><in-capmkt:DateOfBoardOrCommitteeMeetingApprovingTheAgreement contextRef="MainI">2026-05-05</in-capmkt:DateOfBoardOrCommitteeMeetingApprovingTheAgreement><in-capmkt:WhetherProposedOrExecutedAgreementIsInNormalCourseOfBusiness contextRef="MainI">false</in-capmkt:WhetherProposedOrExecutedAgreementIsInNormalCourseOfBusiness><in-capmkt:ReasonForProposedOrExecutedAgreementIsNotInNormalCourseOfBusiness contextRef="MainI">Through proposed Share Subscription and Shareholders Agreement and Power Purchase Agreement the TPCS Private Limited, The SPV, will develop, own, operate and maintain a 49.998 MW AC Solar Power Plant under captive mode on OPEX model in accordance with the open access and captive power policy under prevailing electricity laws and regulations and the Company is going to purhcase such Solar Power with anticipation of cost saving of upto Rs 24 Crores per annum upon Commissioning of the Solar Power Plant</in-capmkt:ReasonForProposedOrExecutedAgreementIsNotInNormalCourseOfBusiness><in-capmkt:ImpactOfAgreementOnManagementAndControlOfTheListedEntity contextRef="MainI">No impact</in-capmkt:ImpactOfAgreementOnManagementAndControlOfTheListedEntity><in-capmkt:NumberOfPartiesToTheAgreement contextRef="MainI" unitRef="pure" decimals="0">4</in-capmkt:NumberOfPartiesToTheAgreement><in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement contextRef="D_PartiesOfTheAgreement1">Sun Photonics Private Limited</in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement><in-capmkt:NatureOfThePartiesOfTheAgreement contextRef="I_PartiesOfTheAgreement1">Party entering into the agreement</in-capmkt:NatureOfThePartiesOfTheAgreement><in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted contextRef="I_PartiesOfTheAgreement1">In pursuant to this Power Purchase Agreement and Share Subscription and Shareholders Agreement the Sun Photonics Private limited which currently holds 49 percent of equity shares in TPCS will hold 23 percent of equity share in the TPCS</in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted><in-capmkt:NumberOfSharesOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement1" unitRef="shares" decimals="INF">1857692</in-capmkt:NumberOfSharesOfPartyOfTheAgreement><in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement1" unitRef="pure" decimals="INF">0.23</in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement><in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner contextRef="I_PartiesOfTheAgreement1">false</in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner><in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement contextRef="D_PartiesOfTheAgreement2">Apra Infrastructure Developers Private Limited</in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement><in-capmkt:NatureOfThePartiesOfTheAgreement contextRef="I_PartiesOfTheAgreement2">Party entering into the agreement</in-capmkt:NatureOfThePartiesOfTheAgreement><in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted contextRef="I_PartiesOfTheAgreement2">In pursuant to this Power Purchase Agreement and Share Subscription and Shareholders Agreement the Apra Infrastructure Developers Private Limited is holding 51 percent of the equity shares of the TPCS Private Limited</in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted><in-capmkt:NumberOfSharesOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement2" unitRef="shares" decimals="INF">4119231</in-capmkt:NumberOfSharesOfPartyOfTheAgreement><in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement2" unitRef="pure" decimals="INF">0.51</in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement><in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner contextRef="I_PartiesOfTheAgreement2">false</in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner><in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement contextRef="D_PartiesOfTheAgreement3">Primo Chemicals Limited</in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement><in-capmkt:NatureOfThePartiesOfTheAgreement contextRef="I_PartiesOfTheAgreement3">Party entering into the agreement</in-capmkt:NatureOfThePartiesOfTheAgreement><in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted contextRef="I_PartiesOfTheAgreement3">In pursuant to this Power Purchase Agreement and Share Subscription and Shareholders Agreement the Listed Entity will subscribe 26 percent of the equity shares of the TPCS Private Limited</in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted><in-capmkt:NumberOfSharesOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement3" unitRef="shares" decimals="INF">2100000</in-capmkt:NumberOfSharesOfPartyOfTheAgreement><in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement3" unitRef="pure" decimals="INF">0.26</in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement><in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner contextRef="I_PartiesOfTheAgreement3">false</in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner><in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement contextRef="D_PartiesOfTheAgreement4">TPCS Private Limited</in-capmkt:NameOfPartiesOrCounterPartiesOfTheAgreement><in-capmkt:NatureOfThePartiesOfTheAgreement contextRef="I_PartiesOfTheAgreement4">Party entering into the agreement</in-capmkt:NatureOfThePartiesOfTheAgreement><in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted contextRef="I_PartiesOfTheAgreement4">No</in-capmkt:DetailsOfShareholdingInTheEntityWithWhomTheAgreementIsExecuted><in-capmkt:NumberOfSharesOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement4" unitRef="shares" decimals="INF">0</in-capmkt:NumberOfSharesOfPartyOfTheAgreement><in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement contextRef="I_PartiesOfTheAgreement4" unitRef="pure" decimals="INF">0</in-capmkt:PercentageOfShareholdingOfPartyOfTheAgreement><in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner contextRef="I_PartiesOfTheAgreement4">false</in-capmkt:WhetherThePartiesToTheAgreementAreRelatedToPromoterOrPromoterGroupOrAssociateOrHoldingOrSubsidiaryOrGroupCompaniesOrDirectorOrKMPAndItsRelativesInAnyManner><in-capmkt:WhetherTheAgreementIsDoneAtArmsLength contextRef="MainI">false</in-capmkt:WhetherTheAgreementIsDoneAtArmsLength><in-capmkt:NotesForTheAgreementIsDoneAtArmsLength contextRef="MainI">Transaction doesnot fall within related party transactions</in-capmkt:NotesForTheAgreementIsDoneAtArmsLength><in-capmkt:DateOnWhichAgreementWasEntered contextRef="MainI">2026-05-14</in-capmkt:DateOnWhichAgreementWasEntered><in-capmkt:PurposeOfEnteringIntoTheAgreement contextRef="MainI">Developing, owning, operating and maintaining a 49.998 MW AC Solar Power Plant under captive mode on OPEX model in accordance with the open access and captive power policy under prevailing electricity laws and regulations.</in-capmkt:PurposeOfEnteringIntoTheAgreement><in-capmkt:SignificantTermsOfTheAgreementInBriefSpecialRightsLikeRightToAppointDirectorsOrFirstRightToShareSubscriptionInCaseOfIssuanceOfSharesOrRightToRestrictAnyChangeInCapitalStructure contextRef="MainI">The shareholding of PRIMO will rank pari passu with that of  the Promoter Group in all respects, including rights to  distributions, dividends, and proceeds upon liquidation or 
winding up of the TPCS. The PRIMO shall have right of first refusal to acquire the future transfer of stake by the Promotor Group. 
The TPCS and the Promoter Group shall not undertake, without prior written intimation to the PRIMO any of the following actions
A         issuance of any new securities or alteration of share capital. 
B         incurring any indebtedness beyond the limits approved in the Project financing documents. 
C         creation of any Encumbrance over the assets of the TPCS.
D         any merger, amalgamation, restructuring, or sale of substantial assets of the TPCS. 
E          any change in the nature or scope of the Project. 
F          any action which may adversely affect the captive status under Electricity Laws. 
G         make any adverse change in the rights and entitlements of the PRIMO.
H         changes in the memorandum or articles of association of the TPCS, except as contemplated under the Transaction Documents that is PPA or which are not in furtherance of actions already approved by the Board. 
I         sale of whole or material part of the Business of the TPCS including physical assets and intellectual 
property.
J        guaranteeing the liability of any third party.
K       any change in the accounting policies of the TPCS. 
I        any capitalization of any reserves or share premium of the TPCS.                                                                                                                                                                                                                                  M        formation of Subsidiaries or joint venture or any  investments or acquisitions, joint intellectual property 
development, out licensing, or similar arrangement or execution, amendment, modification and termination of the joint venture agreements and other similar agreements.
N       mergers, demergers, or spin-offs. 
O       any change in the internal auditor other than the Identified Internal Auditors. 
P        any political or charitable contribution in any given Financial Year, excluding any expenses undertaken to meet corporate social responsibility mandated by the Act.
Q       any Transfer of securities by the Promoters other than  as contemplated in the Transaction Documents.
R        any agreement by the TPCS to undertake any of the above actions.</in-capmkt:SignificantTermsOfTheAgreementInBriefSpecialRightsLikeRightToAppointDirectorsOrFirstRightToShareSubscriptionInCaseOfIssuanceOfSharesOrRightToRestrictAnyChangeInCapitalStructure><in-capmkt:WhetherThereIsAnyIssuanceOrTransferOfSharesToTheParties contextRef="MainI">true</in-capmkt:WhetherThereIsAnyIssuanceOrTransferOfSharesToTheParties><in-capmkt:ClassOfSharesIssuedOrTransferred contextRef="MainI">Equity Shares in terms of Share Subscription and Shareholders Agreement</in-capmkt:ClassOfSharesIssuedOrTransferred><in-capmkt:IssuePricePerShare contextRef="MainD" unitRef="INRPerShare" decimals="INF">100</in-capmkt:IssuePricePerShare><in-capmkt:DetailsAndQuantificationOfTheRestrictionOrLiabilityImposedUponTheListedEntity contextRef="MainD">No</in-capmkt:DetailsAndQuantificationOfTheRestrictionOrLiabilityImposedUponTheListedEntity></xbrli:xbrl>
