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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-04-17</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001655888</issuerCik>
        <issuerName>Owl Rock Capital Corp</issuerName>
        <issuerTradingSymbol>NONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001029160</rptOwnerCik>
            <rptOwnerName>SOROS FUND MANAGEMENT LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>250 WEST 55TH STREET,</rptOwnerStreet1>
            <rptOwnerStreet2>38TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000900203</rptOwnerCik>
            <rptOwnerName>SOROS GEORGE</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>250 WEST 55TH STREET,</rptOwnerStreet1>
            <rptOwnerStreet2>38TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001387524</rptOwnerCik>
            <rptOwnerName>SOROS ROBERT</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>250 WEST 55TH STREET,</rptOwnerStreet1>
            <rptOwnerStreet2>38TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2017-04-17</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5225000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>15.09</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>472598</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares of the common stock of Owl Rock Capital Corporation (&quot;Shares&quot;) were sold directly in the following amounts for the following accounts: (i) 696,667 Shares were sold for the account of Quantum Strategic Partners Ltd., a Cayman Islands exempted limited partnership (&quot;Quantum Strategic Partners&quot;), and (ii) 4,528,333 Shares were sold for the account of QSP Athena LP, a Delaware limited partnership (&quot;QSP Athena&quot;).</footnote>
        <footnote id="F2">These securities are held directly in the following amounts for the following accounts: (i) 63,013 Shares are held for the account of Quantum Strategic Partners, and (ii) 409,585 Shares are held for the account of QSP Athena.</footnote>
        <footnote id="F3">Soros Fund Management LLC (&quot;SFM LLC&quot;) serves as principal investment manager to Quantum Strategic Partners and QSP Athena. As such, SFM LLC has been granted investment discretion over portfolio investments, including the Shares held for the accounts of Quantum Strategic Partners and QSP Athena.  George Soros serves as Chairman of SFM LLC and Robert Soros serves as President and Deputy Chairman of SFM LLC.</footnote>
    </footnotes>

    <remarks>The filing of this statement shall not be deemed an admission that any of the Reporting Persons are the beneficial owner of any securities not held directly for its account for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise.</remarks>

    <ownerSignature>
        <signatureName>/s/ Thomas O'Grady, as Assistant General Counsel</signatureName>
        <signatureDate>2017-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Thomas O'Grady, as Attorney-in-Fact for George Soros</signatureName>
        <signatureDate>2017-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Thomas O'Grady, as Attorney-in-Fact for Robert Soros</signatureName>
        <signatureDate>2017-04-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
