<SEC-DOCUMENT>0001490281-18-000028.txt : 20180316
<SEC-HEADER>0001490281-18-000028.hdr.sgml : 20180316
<ACCEPTANCE-DATETIME>20180316172828
ACCESSION NUMBER:		0001490281-18-000028
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180315
FILED AS OF DATE:		20180316
DATE AS OF CHANGE:		20180316

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Drobny Dane A
		CENTRAL INDEX KEY:			0001492144

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35335
		FILM NUMBER:		18696767

	MAIL ADDRESS:	
		STREET 1:		600 W. CHICAGO AVE
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60654

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Groupon, Inc.
		CENTRAL INDEX KEY:			0001490281
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ADVERTISING AGENCIES [7311]
		IRS NUMBER:				270903295
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		600 WEST CHICAGO AVENUE, SUITE 400
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60654
		BUSINESS PHONE:		(312) 334-1579

	MAIL ADDRESS:	
		STREET 1:		600 WEST CHICAGO AVENUE, SUITE 400
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60654
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_152123569475590.xml
<DESCRIPTION>FORM 4
<TEXT>
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    <periodOfReport>2018-03-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001490281</issuerCik>
        <issuerName>Groupon, Inc.</issuerName>
        <issuerTradingSymbol>GRPN</issuerTradingSymbol>
    </issuer>

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        <reportingOwnerId>
            <rptOwnerCik>0001492144</rptOwnerCik>
            <rptOwnerName>Drobny Dane A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GROUPON, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>600 WEST CHICAGO AVENUE</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60654</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>General Counsel and Secretary</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
                <value>2018-03-15</value>
            </transactionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                </directOrIndirectOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
                <value>2018-03-15</value>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2018-03-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2017-09-15</value>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5000.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>191667</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares withheld by the issuer to satisfy the mandatory tax withholding requirement upon vesting of restricted stock units. This is not an open market sale of securities.</footnote>
        <footnote id="F2">Restricted stock units earned as part of an annual incentive program and granted in accordance with the terms of the Groupon, Inc. 2011 Incentive Plan. These restricted stock units are immediately vested.</footnote>
        <footnote id="F3">Each restricted stock unit represents a contingent right to receive one share of Common Stock.</footnote>
        <footnote id="F4">10,000 of the restricted stock units reported on this line vested on September 15, 2017; 5,000 of the restricted stock units reported on this line vested on each of December 15, 2017 and March 15, 2018; 46,487 of the restricted stock units reported on this line will vest in equal installments quarterly beginning on June 15, 2018 and ending on March 15, 2019; and 145,180 of the restricted stock units reported on this line will vest in equal installments quarterly beginning on June 15, 2019 and ending on March 15, 2020; in each case subject to Mr. Drobny's continued employment with the Company through each vesting date.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Erin G. Stone, by Power of Attorney</signatureName>
        <signatureDate>2018-03-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
