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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2014-12-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001297704</issuerCik>
        <issuerName>OHA Investment Corp</issuerName>
        <issuerTradingSymbol>OHAI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001013025</rptOwnerCik>
            <rptOwnerName>AUGUST GLENN R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O OHA INVESTMENT CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>1114 AVENUE OF THE AMERICAS, 27TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10036</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2014-12-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>12300</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.4107</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>561502</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By man. mem. of OHA Partner Global Co-Investment, LLC, the man. mem. of OHA BDC Investor, LLC</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares of common stock of the Issuer purchased by OHA BDC Investor, LLC pursuant to a trading plan in compliance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (the &quot;Act&quot;).</footnote>
        <footnote id="F2">The price shown in Column 4 is the weighted average purchase price of the shares of common stock of the Issuer, par value $0.001 per share, on the transaction date. The price range for the purchases is $5.34 to $5.48 per share. The Reporting Person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the Issuer or a security holder of the Issuer, full information regarding the number of shares purchased at each separate price.</footnote>
        <footnote id="F3">Includes all shares previously purchased by OHA BDC Investor, LLC pursuant to a trading plan in compliance with Rule 10b5-1 under the Act.</footnote>
        <footnote id="F4">As managing member of OHA Partner Global Co-Investment, LLC, which serves as the managing member of OHA BDC Investor, LLC, the Reporting Person may be deemed to beneficially own the shares of the Issuer held by OHA BDC Investor, LLC.</footnote>
    </footnotes>

    <remarks>Pursuant to Rule 16a-1 under the Act, the Reporting Person may be deemed to be the beneficial owner of the securities reported herein to the extent of his pecuniary interest therein, but this filing shall not be deemed an admission that the Reporting Person is or was, for the purposes of Section 16 of the Act or otherwise, a beneficial owner of any securities of the Issuer. Such beneficial ownership is and was expressly disclaimed by the Reporting Person except to the extent of his pecuniary interests.</remarks>

    <ownerSignature>
        <signatureName>/s/ Gregory S. Rubin, attorney-in-fact</signatureName>
        <signatureDate>2014-12-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
