<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2015-06-11</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001488775</issuerCik>
        <issuerName>ClearBridge Energy MLP Fund Inc.</issuerName>
        <issuerTradingSymbol>CEM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000005272</rptOwnerCik>
            <rptOwnerName>AMERICAN INTERNATIONAL GROUP INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>175 WATER STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10038</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>See Remarks section</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Series F Mandatory Redeemable Preferred Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>160</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held through subsidiaries</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Series G Mandatory Redeemable Preferred Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>300</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held through subsidiaries</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Lexington Insurance Company (&quot;Lexington&quot;), United Guaranty Residential Insurance Company (&quot;UGRIC&quot;) and The United States Life Insurance Company in the City of New York, each an indirectly wholly owned subsidiary of American International Group, Inc. (&quot;AIG&quot;), directly hold 52 shares, 2 shares and 106 shares, respectively, of the Series F Mandatory Redeemable Preferred Stock.</footnote>
        <footnote id="F2">American General Life Insurance Company, also an indirectly wholly owned subsidiary of AIG, and Lexington and UGRIC directly hold 200 shares, 97 shares and 3 shares, respectively, of the Series G Mandatory Redeemable Preferred Stock.</footnote>
    </footnotes>

    <remarks>Filed pursuant to Section 30(h) of the Investment Company Act of 1940. The referenced mandatory redeemable preferred stock are securities which the Reporting Person is informed represent, in the aggregate, in excess of 10% of the preferred equity securities of the Issuer. The Reporting Person expressly disclaims whether the Series F and G Mandatory Redeemable Preferred Stock are subject to reporting under Section 30(h).</remarks>

    <ownerSignature>
        <signatureName>/s/ Geoffrey Cornell, Authorized Person</signatureName>
        <signatureDate>2015-06-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
