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

    <schemaVersion>X0304</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2012-03-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001469510</issuerCik>
        <issuerName>Resolute Energy Corp</issuerName>
        <issuerTradingSymbol>REN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001472621</rptOwnerCik>
            <rptOwnerName>PICCONE JAMES M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1675 BROADWAY,</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1950</rptOwnerStreet2>
            <rptOwnerCity>DENVER</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2012-03-08</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>100306</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>666119</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This restricted stock was granted pursuant to the Issuer's 2009 Performance Incentive Plan.  The Reporting Person's interests in the Restricted Stock will vest pursuant to the vesting schedule set forth in the Restricted Stock Agreement dated March 8, 2012.  Pursuant to the Agreement, 66,870 total shares will vest by the passage of time (&quot;Time Vested Shares&quot;) and 33,436 shares will vest pursuant to certain performance criteria (&quot;Performance Vested Shares&quot;) in four annual installments commencing December 31, 2012 through December 31, 2015.</footnote>
        <footnote id="F2">Consists of 311,252 shares of restricted stock subject to Time- and Performance- Vesting criteria, which vest in annual installments in accordance with such criteria through December 31, 2015.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ James M. Piccone</signatureName>
        <signatureDate>2012-03-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
