<SEC-DOCUMENT>0001620533-17-000082.txt : 20170515
<SEC-HEADER>0001620533-17-000082.hdr.sgml : 20170515
<ACCEPTANCE-DATETIME>20170515195606
ACCESSION NUMBER:		0001620533-17-000082
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170511
FILED AS OF DATE:		20170515
DATE AS OF CHANGE:		20170515

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:			Gulf Five Fiduciary Management Corp
		CENTRAL INDEX KEY:			0001706756
		STATE OF INCORPORATION:			WY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36823
		FILM NUMBER:		17846699

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 308
		CITY:			WILSON
		STATE:			WY
		ZIP:			83014
		BUSINESS PHONE:		9178801401

	MAIL ADDRESS:	
		STREET 1:		PO BOX 308
		CITY:			WILSON
		STATE:			WY
		ZIP:			83014

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Flug 2015 GS Trust U/A/D 12/29/15
		CENTRAL INDEX KEY:			0001706704
		STATE OF INCORPORATION:			WY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36823
		FILM NUMBER:		17846700

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 308
		CITY:			WILSON
		STATE:			WY
		ZIP:			83014
		BUSINESS PHONE:		917-880-1401

	MAIL ADDRESS:	
		STREET 1:		PO BOX 308
		CITY:			WILSON
		STATE:			WY
		ZIP:			83014

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Flug Jeffrey
		CENTRAL INDEX KEY:			0001396917

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36823
		FILM NUMBER:		17846701

	MAIL ADDRESS:	
		STREET 1:		C/O PENNANTPARK INVESTMENT CORPORATION
		STREET 2:		445 PARK AVENUE, 10TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FLUG SHERYL H
		CENTRAL INDEX KEY:			0001633964

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36823
		FILM NUMBER:		17846702

	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_149489255133975.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-05-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001396917</rptOwnerCik>
            <rptOwnerName>Flug Jeffrey</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>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001706704</rptOwnerCik>
            <rptOwnerName>Flug 2015 GS Trust U/A/D 12/29/15</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001706756</rptOwnerCik>
            <rptOwnerName>Gulf Five Fiduciary Management Corp</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001633964</rptOwnerCik>
            <rptOwnerName>FLUG SHERYL H</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>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>CLASS A COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
                <value>2017-05-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>36.6641</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>75000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>BY TRUST</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>CLASS A COMMON STOCK</value>
            </securityTitle>
            <transactionDate>
                <value>2017-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>26000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>36.5284</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>49000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>BY TRUST</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>CLASS A COMMON STOCK</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3240</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The transaction was executed in multiple trades at prices ranging from $36.5000 to $36.9200.  The price reported above reflects the weighted average sales price.</footnote>
        <footnote id="F2">Each Reporting Person hereby undertakes to provide upon request to the SEC staff, Shake Shack Inc. (the &quot;Issuer&quot;) 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="F3">Represents shares of Class A Common Stock (&quot;Class A Stock&quot;) of the Issuer held by the Flug 2015 GS Trust U/A/D 12/29/15 (the &quot;Trust&quot;). Gulf Five Fiduciary Management Corp. is the trustee of the Trust. Sheryl Flug, the wife of Jeffrey Flug, is the President of Gulf Five Fiduciary Management Corp. Each Reporting Person disclaims beneficial ownership of such securities except to the extent of such Reporting Person's pecuniary interest therein.</footnote>
        <footnote id="F4">The transaction was executed in multiple trades at prices ranging from $36.5000 to $36.7000.  The price reported above reflects the weighted average sales price.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Ronald Palmese, Jr., Esq., Attorney-in-Fact for Jeffrey Flug</signatureName>
        <signatureDate>2017-05-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Ronald Palmese, Jr., Esq., Attorney-in-Fact for Flug 2015 GS Trust U/A/D 12/29/15, by Gulf Five Fiduciary Management Corp., its Trustee</signatureName>
        <signatureDate>2017-05-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Ronald Palmese, Jr., Esq., Attorney-in-Fact for Gulf Five Fiduciary Management Corp, by Sheryl Flug, its President</signatureName>
        <signatureDate>2017-05-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Ronald Palmese, Jr., Esq. Attorney-in-Fact for Sheryl Flug</signatureName>
        <signatureDate>2017-05-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
