<SEC-DOCUMENT>0001104659-20-074673.txt : 20200618
<SEC-HEADER>0001104659-20-074673.hdr.sgml : 20200618
<ACCEPTANCE-DATETIME>20200618163033
ACCESSION NUMBER:		0001104659-20-074673
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20200305
FILED AS OF DATE:		20200618
DATE AS OF CHANGE:		20200618

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EQT Corp
		CENTRAL INDEX KEY:			0000033213
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38629
		FILM NUMBER:		20972954

	BUSINESS ADDRESS:	
		STREET 1:		625 LIBERTY AVENUE
		STREET 2:		SUITE 1700
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15222
		BUSINESS PHONE:		4125535700

	MAIL ADDRESS:	
		STREET 1:		625 LIBERTY AVENUE
		STREET 2:		SUITE 1700
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15222

	FORMER NAME:	
		FORMER CONFORMED NAME:	EQT Corp /PA/
		DATE OF NAME CHANGE:	20090206

	FORMER NAME:	
		FORMER CONFORMED NAME:	EQUITABLE RESOURCES INC /PA/
		DATE OF NAME CHANGE:	19920703

	FORMER NAME:	
		FORMER CONFORMED NAME:	EQUITABLE GAS CO
		DATE OF NAME CHANGE:	19841120

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Equitrans Midstream Corp
		CENTRAL INDEX KEY:			0001747009
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				830516635
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2200 ENERGY DRIVE
		CITY:			CANONSBURG
		STATE:			PA
		ZIP:			15317
		BUSINESS PHONE:		724-271-7600

	MAIL ADDRESS:	
		STREET 1:		2200 ENERGY DRIVE
		CITY:			CANONSBURG
		STATE:			PA
		ZIP:			15317

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	EQT Midstream SpinCo, Inc.
		DATE OF NAME CHANGE:	20180717
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>a4.xml
<DESCRIPTION>4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-03-05</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001747009</issuerCik>
        <issuerName>Equitrans Midstream Corp</issuerName>
        <issuerTradingSymbol>ETRN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000033213</rptOwnerCik>
            <rptOwnerName>EQT Corp</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>625 LIBERTY AVENUE, SUITE 1700</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PITTSBURGH</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>15222</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-03-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>25299752</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25299751</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On November 12, 2018, EQT Corporation (the Reporting Person) completed the spin-off of Equitrans Midstream Corporation (the Company) through the distribution of approximately 80.1% of the outstanding shares of common stock, no par value, of the Company (Company Common Stock) to the Reporting Person's shareholders (the Distribution).  Immediately following the Distribution, the Reporting Person owned 50,599,503 shares of Company Common Stock, or approximately 19.9% of the shares of Company Common Stock outstanding as of such time.  On February 26, 2020, the Reporting Person entered into share purchase agreements with the Company, pursuant to which the Reporting Person agreed to sell to the Company</footnote>
        <footnote id="F2">(i) 4,769,496 shares of Company Common Stock in exchange for approximately $46 million in cash and (ii) 20,530,256 shares of Company Common Stock in exchange for a promissory note issued by the Company (the Rate Relief Note) representing approximately $196 million in aggregate principal amount, and cash in the amount of approximately $7 million ((i) and (ii) collectively, the Share Exchange). On March 5, 2020, the Reporting Person assigned the Rate Relief Note to EQM Midstream Partners, LP (EQM), an affiliate of the Company, as consideration for certain commercial terms, including potential reductions in gathering fees, contemplated in that certain Gas Gathering and Compression Agreement, dated as of February 26, 2020, by and between the Reporting Person, EQT Production Company, Rice Drilling B LLC, EQT Energy, LLC and EQM Gathering Opco, LLC, a wholly owned subsidiary of EQM. The Share Exchange also closed on March 5, 2020.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ William E. Jordan, Executive Vice President and General Counsel of EQT Corporation</signatureName>
        <signatureDate>2020-06-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
