<SEC-DOCUMENT>0001620533-19-000057.txt : 20190521
<SEC-HEADER>0001620533-19-000057.hdr.sgml : 20190521
<ACCEPTANCE-DATETIME>20190521170832
ACCESSION NUMBER:		0001620533-19-000057
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190518
FILED AS OF DATE:		20190521
DATE AS OF CHANGE:		20190521

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Koff Zach
		CENTRAL INDEX KEY:			0001693743

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36823
		FILM NUMBER:		19843163

	MAIL ADDRESS:	
		STREET 1:		C/O SHAKE SHACK INC.
		STREET 2:		24 UNION SQUARE EAST, 5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10003

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:			1231

	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_155847289696082.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-05-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001693743</rptOwnerCik>
            <rptOwnerName>Koff Zach</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>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Operating Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>CLASS A COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
                <value>2019-05-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>368</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>59.77</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8163</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>CLASS A COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
                <value>2019-05-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>283</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>59.77</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7880</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of Class A Common Stock of Shake Shack Inc. (the &quot;Issuer&quot;) withheld for taxes upon the vesting of restricted stock units that were previously acquired by the Reporting Person upon the Issuer's achievement of certain performance criteria for fiscal year 2017, as determined by the Issuer's Compensation Committee on March 22, 2018.</footnote>
        <footnote id="F2">Represents shares of Class A Common Stock of the Issuer withheld for taxes upon the vesting of restricted stock units that were previously acquired by the Reporting Person upon the Issuer's achievement of certain performance criteria for fiscal year 2018, as determined by the Issuer's Compensation Committee on March 11, 2019.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ronald Palmese Jr., Esq.,
Attorney-in-Fact for Zachary Koff</signatureName>
        <signatureDate>2019-05-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
