<SEC-DOCUMENT>0001606268-21-000019.txt : 20210317
<SEC-HEADER>0001606268-21-000019.hdr.sgml : 20210317
<ACCEPTANCE-DATETIME>20210317110907
ACCESSION NUMBER:		0001606268-21-000019
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210315
FILED AS OF DATE:		20210317
DATE AS OF CHANGE:		20210317

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Clay Barbara
		CENTRAL INDEX KEY:			0001824354

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36559
		FILM NUMBER:		21749413

	MAIL ADDRESS:	
		STREET 1:		C/O GOOD COUNSEL SERVICES, LLC
		STREET 2:		111 FARMS ROAD
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06903

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Spark Energy, Inc.
		CENTRAL INDEX KEY:			0001606268
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				465453215
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		12140 WICKCHESTER LANE
		STREET 2:		SUITE 100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77079
		BUSINESS PHONE:		(713) 600-2600

	MAIL ADDRESS:	
		STREET 1:		12140 WICKCHESTER LANE
		STREET 2:		SUITE 100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77079
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_161599373197840.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-03-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001606268</issuerCik>
        <issuerName>Spark Energy, Inc.</issuerName>
        <issuerTradingSymbol>SPKE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001824354</rptOwnerCik>
            <rptOwnerName>Clay Barbara</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GOOD COUNSEL SERVICES, LLC</rptOwnerStreet1>
            <rptOwnerStreet2>111 FARMS ROAD</rptOwnerStreet2>
            <rptOwnerCity>STAMFORD</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06903</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Acting General Counsel and Sec</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-03-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>488</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.40</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>488.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>28522</value>
                    <footnoteId id="F5"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each restricted stock unit (&quot;Restricted Stock Unit&quot;) represents a right to receive, upon vesting, one share of Class A Common Stock, par value $0.01 per share (the &quot;Class A Common Stock&quot;), of Spark Energy, Inc., cash, or a combination of both. Each Restricted Stock Unit includes tandem dividend equivalents which will vest upon the same schedule as the underlying Restricted Stock Unit.</footnote>
        <footnote id="F2">These Restricted Stock Units accrued on outstanding Restricted Stock Units held by the reporting person as a result of a dividend equivalent payment made to the holder when the Company paid its most recent quarterly dividend on the Class A Common Stock.</footnote>
        <footnote id="F3">These Restricted Stock Units vest 50% on May 18, 2021 and 50% on May 18, 2022.</footnote>
        <footnote id="F4">The price is based on the closing price on Monday, March 1, 2021.</footnote>
        <footnote id="F5">Balance includes original grants of Restricted Stock Units and dividend equivalents issued in additional Restricted Stock Units.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Barbara Clay, by Dominique Colvard, Attorney-in-Fact</signatureName>
        <signatureDate>2021-03-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
