<SEC-DOCUMENT>0001127602-14-031808.txt : 20141112
<SEC-HEADER>0001127602-14-031808.hdr.sgml : 20141111
<ACCEPTANCE-DATETIME>20141112060419
ACCESSION NUMBER:		0001127602-14-031808
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20141111
FILED AS OF DATE:		20141112
DATE AS OF CHANGE:		20141112

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MRC GLOBAL INC.
		CENTRAL INDEX KEY:			0001439095
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-INDUSTRIAL MACHINERY & EQUIPMENT [5084]
		IRS NUMBER:				205956993
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2 HOUSTON CENTER
		STREET 2:		909 FANNIN, SUITE 3100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77010
		BUSINESS PHONE:		877.294.7574

	MAIL ADDRESS:	
		STREET 1:		2 HOUSTON CENTER
		STREET 2:		909 FANNIN, SUITE 3100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MCJUNKIN RED MAN HOLDING CORP
		DATE OF NAME CHANGE:	20080702

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lane Andrew R
		CENTRAL INDEX KEY:			0001297853

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35479
		FILM NUMBER:		141210718

	MAIL ADDRESS:	
		STREET 1:		MRC GLOBAL INC.
		STREET 2:		2 HOUSTON CENTER, 909 FANNIN, SUITE 3100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77010
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2014-11-11</periodOfReport>

    <issuer>
        <issuerCik>0001439095</issuerCik>
        <issuerName>MRC GLOBAL INC.</issuerName>
        <issuerTradingSymbol>MRC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001297853</rptOwnerCik>
            <rptOwnerName>Lane Andrew R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2 HOUSTON CENTER</rptOwnerStreet1>
            <rptOwnerStreet2>909 FANNIN, SUITE 3100</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77010</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <officerTitle>Chairman, President and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2014-11-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>23500</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>21.1541</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>234174</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Through A Limited Partnership</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Mr. Lane invested an additional $497,121.35 to acquire 23,500 shares of the issuer's common stock.  This purchase is in addition to the $3 million Mr. Lane invested in September 2008 to acquire 85,109 shares of the issuer's common stock.  Collectively, Mr. Lane has invested approximately $3.5 million to acquire 108,609 shares of the issuer's common stock.  Mr. Lane has also been awarded 175,113 shares of the issuer's restricted common stock, of which 49,548 shares have been surrendered to satisfy tax withholding obligations.  Mr. Lane currently holds all of his ownership in the issuer through a limited partnership.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Daniel J. Churay, Attorney-in-fact</signatureName>
        <signatureDate>2014-11-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
