<SEC-DOCUMENT>0001606268-19-000082.txt : 20190618
<SEC-HEADER>0001606268-19-000082.hdr.sgml : 20190618
<ACCEPTANCE-DATETIME>20190618153238
ACCESSION NUMBER:		0001606268-19-000082
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190614
FILED AS OF DATE:		20190618
DATE AS OF CHANGE:		20190618

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Garrett Jason K.
		CENTRAL INDEX KEY:			0001649957

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36559
		FILM NUMBER:		19903614

	MAIL ADDRESS:	
		STREET 1:		2105 CITYWEST BLVD., SUITE 100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77042

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_156088634079581.xml
<DESCRIPTION>FORM 4
<TEXT>
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<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-06-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001649957</rptOwnerCik>
            <rptOwnerName>Garrett Jason K.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>12140 WICKCHESTER LANE SUITE 100</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77079</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive VP, Retail</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-06-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1807</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.80</value>
                </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>1807.0</value>
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            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>99493</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
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            <transactionDate>
                <value>2019-06-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1524</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.80</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
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            <expirationDate>
                <footnoteId id="F5"/>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
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                <underlyingSecurityShares>
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            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>83911</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each restricted stock unit (&quot;RSU&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 RSU includes tandem dividend equivalents which will vest upon the same schedule as the underlying RSU.</footnote>
        <footnote id="F2">These RSUs accrued on outstanding RSUs 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 RSUs vest ratably over four years in May of each year starting in the year following the grant.</footnote>
        <footnote id="F4">Balance includes original grants of RSUs and dividend equivalents issued in additional RSUs.</footnote>
        <footnote id="F5">These RSUs vest upon certain conditions in connection with a &quot;Change in Control&quot; of Spark Energy, Inc. as such term is defined in the Form of Notice of Grant of Restricted Stock Unit (Change in Control Restricted Stock Units), filed as Exhibit 10.5 to Spark Energy, Inc.'s Quarterly Report on Form 10-Q for quarter ended June 30, 2018.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jason K Garrett, by C. Alexis Keene, as Attorney-in-Fact</signatureName>
        <signatureDate>2019-06-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
