<SEC-DOCUMENT>0000078890-23-000158.txt : 20230307
<SEC-HEADER>0000078890-23-000158.hdr.sgml : 20230307
<ACCEPTANCE-DATETIME>20230307205559
ACCESSION NUMBER:		0000078890-23-000158
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230303
FILED AS OF DATE:		20230307
DATE AS OF CHANGE:		20230307

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Eubanks Richard M.
		CENTRAL INDEX KEY:			0001510025

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09148
		FILM NUMBER:		23714662

	MAIL ADDRESS:	
		STREET 1:		1121 HIGHWAY 74 SOUTH
		CITY:			PEACHTREE
		STATE:			GA
		ZIP:			30269

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BRINKS CO
		CENTRAL INDEX KEY:			0000078890
		STANDARD INDUSTRIAL CLASSIFICATION:	ARRANGEMENT OF TRANSPORTATION OF FREIGHT & CARGO [4731]
		IRS NUMBER:				541317776
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1801 BAYBERRY COURT
		STREET 2:		P O BOX 18100
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23226-1800
		BUSINESS PHONE:		804-289-9600

	MAIL ADDRESS:	
		STREET 1:		1801 BAYBERRY COURT
		STREET 2:		P O BOX 18100
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23226-8100

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PITTSTON CO
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_167824054763850.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-03-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000078890</issuerCik>
        <issuerName>BRINKS CO</issuerName>
        <issuerTradingSymbol>BCO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001510025</rptOwnerCik>
            <rptOwnerName>Eubanks Richard M.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>555 DIVIDEND DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>COPPELL</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2023-03-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>18075</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>42946</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Each Restricted Stock Unit (&quot;RSU&quot;) represents a right to receive, subject to the terms and conditions of the 2017 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three annual installments, beginning in March 2024.</footnote>
        <footnote id="F2">Represents RSUs that have not yet vested.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Beth Davis, Attorney-in-Fact</signatureName>
        <signatureDate>2023-03-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
