<SEC-DOCUMENT>0001620533-22-000051.txt : 20220616
<SEC-HEADER>0001620533-22-000051.hdr.sgml : 20220616
<ACCEPTANCE-DATETIME>20220616194410
ACCESSION NUMBER:		0001620533-22-000051
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220615
FILED AS OF DATE:		20220616
DATE AS OF CHANGE:		20220616

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SOKOLOFF JONATHAN D
		CENTRAL INDEX KEY:			0001175522

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36823
		FILM NUMBER:		221022007

	MAIL ADDRESS:	
		STREET 1:		11111 SANTA MONICA BLVD
		STREET 2:		STE 2000
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90025

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Shake Shack Inc.
		CENTRAL INDEX KEY:			0001620533
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-EATING & DRINKING PLACES [5810]
		IRS NUMBER:				471941186
		FISCAL YEAR END:			1228

	BUSINESS ADDRESS:	
		STREET 1:		225 VARICK STREET
		STREET 2:		SUITE 301
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014
		BUSINESS PHONE:		(646) 747-7200

	MAIL ADDRESS:	
		STREET 1:		225 VARICK STREET
		STREET 2:		SUITE 301
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10014
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_165542303615077.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-06-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001620533</issuerCik>
        <issuerName>Shake Shack Inc.</issuerName>
        <issuerTradingSymbol>SHAK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001175522</rptOwnerCik>
            <rptOwnerName>SOKOLOFF JONATHAN D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SHAKE SHACK INC.</rptOwnerStreet1>
            <rptOwnerStreet2>225 VARICK STREET, SUITE 301</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10014</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>CLASS A COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
                <value>2022-06-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1545</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>40.47</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4432</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>34.62</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2017-05-19</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2026-05-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>CLASS A COMMON STOCK</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2003.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2003</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Employee Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>21.0</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2016-01-29</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2025-01-29</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>CLASS A COMMON STOCK</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8251.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8251</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of Class A Common Stock (&quot;Class A Stock&quot;) of Shake Shack Inc. (the &quot;Issuer&quot;) underlying restricted stock units acquired by the Reporting Person. On June 15, 2022, pursuant to the Issuer's 2015 Incentive Award Plan, as amended, and the Issuer's Non-Employee Director Compensation Policy, the Reporting Person was awarded restricted stock units that represent the right to receive Class A Stock of the Issuer. The restricted stock units representing the right to receive Class A Stock of the Issuer vest on June 15, 2023, subject to the Reporting Person's continued service with the Issuer.</footnote>
        <footnote id="F2">These options are fully vested.</footnote>
        <footnote id="F3">The options reported on this row were granted in respect of the Reporting Person's service on the Issuer's Board of Directors and are held by the Reporting Person for the benefit of Leonard Green &amp; Partners, L.P.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ronald Palmese, Jr., as Attorney-in-Fact for Jonathan D. Sokoloff</signatureName>
        <signatureDate>2022-06-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
