<SEC-DOCUMENT>0001789507-26-000004.txt : 20260107
<SEC-HEADER>0001789507-26-000004.hdr.sgml : 20260107
<ACCEPTANCE-DATETIME>20260107134700
ACCESSION NUMBER:		0001789507-26-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260105
FILED AS OF DATE:		20260107
DATE AS OF CHANGE:		20260107

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Wheadon David E.
		CENTRAL INDEX KEY:			0001789507
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37835
		FILM NUMBER:		26515068

	MAIL ADDRESS:	
		STREET 1:		C/O ASSERTIO THERAPEUTICS, INC.
		STREET 2:		100 SOUTH SAUNDERS ROAD, SUITE 300
		CITY:			LAKE FOREST
		STATE:			IL
		ZIP:			60045

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INDIVIOR PLC
		CENTRAL INDEX KEY:			0001625297
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		EIN:				000000000
		STATE OF INCORPORATION:			X0
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		234 BATH ROAD
		CITY:			SLOUGH, BERKSHIRE
		STATE:			X0
		ZIP:			SL1 4EE
		BUSINESS PHONE:		804-379-1090

	MAIL ADDRESS:	
		STREET 1:		234 BATH ROAD
		CITY:			SLOUGH, BERKSHIRE
		STATE:			X0
		ZIP:			SL1 4EE
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1767811617.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-01-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001625297</issuerCik>
        <issuerName>INDIVIOR PLC</issuerName>
        <issuerTradingSymbol>INDV</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001789507</rptOwnerCik>
            <rptOwnerName>Wheadon David E.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>10710 MIDLOTHIAN TURNPIKE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 125</rptOwnerStreet2>
            <rptOwnerCity>NORTH CHESTERFIELD</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>23235</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>1</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Ordinary Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2026-01-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1771</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>35.3926</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14395</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Securities acquired pursuant to the director's participation in a Non-Executive Director Purchase Plan to receive a portion of the fees received for service as a director in stock in lieu of cash.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Jordan Saltzberg, Power of Attorney</signatureName>
        <signatureDate>2026-01-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
