<SEC-DOCUMENT>0000899243-17-023680.txt : 20171005
<SEC-HEADER>0000899243-17-023680.hdr.sgml : 20171005
<ACCEPTANCE-DATETIME>20171005163316
ACCESSION NUMBER:		0000899243-17-023680
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20171003
FILED AS OF DATE:		20171005
DATE AS OF CHANGE:		20171005

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Baiera Gavin R.
		CENTRAL INDEX KEY:			0001605616

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38086
		FILM NUMBER:		171124986

	MAIL ADDRESS:	
		STREET 1:		26 SHIPWAY ROAD
		CITY:			DARIEN
		STATE:			CT
		ZIP:			06820

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Vistra Energy Corp
		CENTRAL INDEX KEY:			0001692819
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				364833255
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1601 BRYAN STREET
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201-3411
		BUSINESS PHONE:		214-812-4600

	MAIL ADDRESS:	
		STREET 1:		1601 BRYAN STREET
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75201-3411
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-10-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001692819</issuerCik>
        <issuerName>Vistra Energy Corp</issuerName>
        <issuerTradingSymbol>VST</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001605616</rptOwnerCik>
            <rptOwnerName>Baiera Gavin R.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>26 SHIPWAY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DARIEN</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06820</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-10-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5291</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5291</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Excludes 18,320,211 shares owned by funds and accounts managed by Angelo, Gordon &amp; Co., L.P. that were previously disclosed and may have been deemed to be beneficially owned by Mr. Baiera as managing director thereof due to the fact that Mr. Baiera is no longer associated with Angelo, Gordon &amp; Co., L.P.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Gavin R. Baiera</signatureName>
        <signatureDate>2017-10-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
