<SEC-DOCUMENT>0001127602-21-005409.txt : 20210212
<SEC-HEADER>0001127602-21-005409.hdr.sgml : 20210212
<ACCEPTANCE-DATETIME>20210212153757
ACCESSION NUMBER:		0001127602-21-005409
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210210
FILED AS OF DATE:		20210212
DATE AS OF CHANGE:		20210212

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HATTEN TERRY P.
		CENTRAL INDEX KEY:			0001593983

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35914
		FILM NUMBER:		21626616

	MAIL ADDRESS:	
		STREET 1:		6565 N. MACARTHUR BLVD, STE 800
		CITY:			IRVING
		STATE:			TX
		ZIP:			75039

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Murphy USA Inc.
		CENTRAL INDEX KEY:			0001573516
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-AUTO DEALERS & GASOLINE STATIONS [5500]
		IRS NUMBER:				462279221
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		200 PEACH STREET
		CITY:			EL DORADO
		STATE:			AR
		ZIP:			71730-5836
		BUSINESS PHONE:		(870) 875-7600

	MAIL ADDRESS:	
		STREET 1:		200 PEACH STREET
		CITY:			EL DORADO
		STATE:			AR
		ZIP:			71730-5836
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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    <periodOfReport>2021-02-10</periodOfReport>

    <issuer>
        <issuerCik>0001573516</issuerCik>
        <issuerName>Murphy USA Inc.</issuerName>
        <issuerTradingSymbol>MUSA</issuerTradingSymbol>
    </issuer>

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            <rptOwnerCik>0001593983</rptOwnerCik>
            <rptOwnerName>HATTEN TERRY P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 PEACH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>EL DORADO</rptOwnerCity>
            <rptOwnerState>AR</rptOwnerState>
            <rptOwnerZipCode>71730</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>SVP, Human Resources</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value>Common Stock</value>
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                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
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                <transactionPricePerShare>
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                <underlyingSecurityTitle>
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                <transactionPricePerShare>
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                </underlyingSecurityTitle>
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                </underlyingSecurityShares>
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                </sharesOwnedFollowingTransaction>
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                    <footnoteId id="F1"/>
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                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
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            <securityTitle>
                <value>Stock Option</value>
                <footnoteId id="F3"/>
            </securityTitle>
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            </conversionOrExercisePrice>
            <transactionDate>
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            </transactionDate>
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                <transactionFormType>4</transactionFormType>
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                <transactionPricePerShare>
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                </transactionAcquiredDisposedCode>
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                <footnoteId id="F6"/>
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            <expirationDate>
                <value>2028-02-10</value>
            </expirationDate>
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                <underlyingSecurityTitle>
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                </underlyingSecurityShares>
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    <footnotes>
        <footnote id="F1">Represents performance-based restricted stock units (&quot;PSUs&quot;) and corresponding dividend equivalents accrued to the Reporting Person, under the 2013 Long Term Incentive Plan (the &quot;Plan&quot;) that have vested and settled in shares of the Company's stock.  Pursuant to the terms of the PSUs the total includes 159.00% of the original award.</footnote>
        <footnote id="F2">Shares withheld for taxes on PSU vesting.</footnote>
        <footnote id="F3">Reflects an award granted under the Plan.</footnote>
        <footnote id="F4">Reflects dividend equivalent units accrued on PSUs granted to the Reporting Person under the Plan. Each dividend equivalent unit reflects the right to  receive common stock, subject to the terms and conditions (including vesting and settlement terms) applicable to the corresponding PSU.</footnote>
        <footnote id="F5">These Securities generally do not carry a Conversion Price, Exercisable Date, or Expiration Date.</footnote>
        <footnote id="F6">The option vests in two equal installments, the first half two years after the grant date and the final half three years after the grant date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Gregory L. Smith, attorney-in-fact</signatureName>
        <signatureDate>2021-02-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
