<SEC-DOCUMENT>0001620533-17-000054.txt : 20170329
<SEC-HEADER>0001620533-17-000054.hdr.sgml : 20170329
<ACCEPTANCE-DATETIME>20170329175033
ACCESSION NUMBER:		0001620533-17-000054
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170327
FILED AS OF DATE:		20170329
DATE AS OF CHANGE:		20170329

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:		24 UNION SQUARE EAST
		STREET 2:		5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10003
		BUSINESS PHONE:		(646) 747-7200

	MAIL ADDRESS:	
		STREET 1:		24 UNION SQUARE EAST
		STREET 2:		5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10003

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GARUTTI RANDALL J
		CENTRAL INDEX KEY:			0001632017

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36823
		FILM NUMBER:		17723217

	MAIL ADDRESS:	
		STREET 1:		C/O SHAKE SHACK INC.
		STREET 2:		24 UNION SQUARE EAST, 5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10003
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_149082421774313.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-03-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001632017</rptOwnerCik>
            <rptOwnerName>GARUTTI RANDALL J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O SHAKE SHACK INC.</rptOwnerStreet1>
            <rptOwnerStreet2>24 UNION SQUARE EAST, 5TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10003</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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                <value>CLASS A COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
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            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20213</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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        <nonDerivativeTransaction>
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                <value>CLASS A COMMON STOCK</value>
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            <transactionDate>
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                <transactionCode>S</transactionCode>
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                <transactionPricePerShare>
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                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
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                    <value>12213</value>
                    <footnoteId id="F5"/>
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                <directOrIndirectOwnership>
                    <value>D</value>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>CLASS B COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
                <value>2017-03-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F6"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>709051</value>
                    <footnoteId id="F7"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>CLASS B COMMON STOCK</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>55972</value>
                    <footnoteId id="F8"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>BY TRUST</value>
                    <footnoteId id="F8"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Membership Interests</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F9"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2017-03-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>C</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>8000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F9"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F9"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>CLASS A COMMON STOCK</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>8000.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>709051</value>
                    <footnoteId id="F10"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeHolding>
            <securityTitle>
                <value>Common Membership Interests</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F9"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F9"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F9"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>CLASS A COMMON STOCK</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>55972.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>55972</value>
                    <footnoteId id="F11"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>BY TRUST</value>
                    <footnoteId id="F11"/>
                </natureOfOwnership>
            </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;) that were obtained upon a redemption of an equal number of common membership interests in SSE Holdings, LLC (the &quot;LLC Interests&quot;). The LLC Interests are redeemable for an equal number of shares of Class A Stock, or, at the election of the Issuer, cash equal to the volume-weighted average prices of such shares.</footnote>
        <footnote id="F2">Represents shares of Class A Stock that were disposed of by the Reporting Person pursuant to a 10b5-1 trading plan entered into on August 23, 2016.</footnote>
        <footnote id="F3">The transaction was executed in multiple trades at prices ranging from $32.0100 to $32.4100.  The price reported above reflects the weighted average sales price.</footnote>
        <footnote id="F4">The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transaction was effected.</footnote>
        <footnote id="F5">Represents shares of Class A Stock of the Issuer held by the Reporting Person.</footnote>
        <footnote id="F6">Pursuant to the Amended and Restated Certificate of Incorporation of the Issuer, the shares of the Issuer's Class B Common Stock (&quot;Class B Stock&quot;) are cancelled for no consideration on a one-for-one basis upon redemption of the LLC Interests for shares of Class A Stock.</footnote>
        <footnote id="F7">Represents shares of Class B Stock held by the Reporting Person.</footnote>
        <footnote id="F8">Represents shares of Class B Stock of the Issuer held by The Randall J. Garutti 2014 GST Trust (the &quot;Trust&quot;), of which the Reporting Person's spouse is a trustee and beneficiary.  The Reporting Person disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F9">The LLC Interests are redeemable for an equal number of shares of the Issuer's Class A Stock or, at the election of the Issuer, cash equal to the volume-weighted average market price of such shares.  The LLC Interests have no expiration date.</footnote>
        <footnote id="F10">Represents LLC Interests held by Reporting Person.</footnote>
        <footnote id="F11">Represents LLC Interests held by the Trust.  The Reporting Person disclaims beneficial ownership of such interests except to the extent of his pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ronald Palmese, Jr., Esq., Attorney-in-Fact for Randall J. Garutti</signatureName>
        <signatureDate>2017-03-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
