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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2020-11-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001805795</issuerCik>
        <issuerName>Mallard Acquisition Corp.</issuerName>
        <issuerTradingSymbol>MACUU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001805499</rptOwnerCik>
            <rptOwnerName>Kirtley John F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>19701 BETHEL CHURCH ROAD, SUITE 302</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CORNELIUS</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>28031</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2020-11-27</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>412500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2750000</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See note</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">As described in the issuer's registration statement on Form S-1 (File No. 333-248939 (the &quot;Registration Statement&quot;) under the heading &quot;Description of Securities--Founder Shares,&quot; the shares of common stock, par value $0.0001 per share, will automatically be converted into shares common stock, par value $0.0001 per share, at the time of the issuer's initial business combination, on a one-for-one basis, subject to certain adjustments described therein and have no expiration date.</footnote>
        <footnote id="F2">These shares represent common stock held by Mallard Founders Holdings, LLC (the &quot;Sponsor&quot;) acquired pursuant to a subscription agreement by and between the Sponsor and the issuer.</footnote>
        <footnote id="F3">As contemplated in connection with the initial public offering of the issuer, 412,500 shares of common stock of the issuer were returned by the Sponsor to the issuer for no consideration and cancelled because the underwriters' over-allotment option was not exercised.</footnote>
        <footnote id="F4">Mr. John F. Kirtley is a managing member of the Sponsor and has voting and investment discretion with respect to the securities held by the Sponsor. As such, he may be deemed to share beneficial ownership of the shares of common stock held directly by the Sponsor.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John F. Kirtley</signatureName>
        <signatureDate>2020-11-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
