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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-07-02</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001549966</issuerCik>
        <issuerName>Silvercrest Asset Management Group Inc.</issuerName>
        <issuerTradingSymbol>SAMG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001562005</rptOwnerCik>
            <rptOwnerName>VULCAN WEALTH MANAGEMENT LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>505 FIFTH AVENUE SOUTH, SUITE 900</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98104</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>Class B common stock, par value $0.01</value>
                <footnoteId id="F3"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <transactionDate>
                <value>2013-07-02</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2678657</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.01</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Vulcan Wealth Management LLC is wholly-owned by Vulcan Capital Private Equity I LLC. Vulcan Capital Private Equity Inc. is the managing member of Vulcan Capital Private Equity Management I LLC, which is the manager of Vulcan Capital Private Equity I LLC. Paul Allen is the sole stockholder of Vulcan Capital Private Equity Inc., and, as such, possesses sole voting and investment power over the shares held by Vulcan Wealth Management LLC. Mr. Allen disclaims beneficial ownership of the shares held by Vulcan Wealth Management LLC, except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F2">Each share of Class B common stock entitles the holder to one (1) vote per share on all matters submitted to a vote of Silvercrest Asset Management Group Inc.'s (the &quot;Corporation&quot;) common stockholders. Shares of Class B common stock are not transferable unless transferred concurrently with the corresponding Class B unit and with the consent of the Corporation and Silvercrest L.P.</footnote>
        <footnote id="F3">The Corporation purchased the Class B common stock in connection with its purchase of a corresponding number of Class B Units of Silvercrest L.P. for an aggregate of approximately $26.8 million.</footnote>
    </footnotes>

    <remarks>Vulcan Wealth Management LLC is wholly-owned by Vulcan Capital Private Equity I LLC. Vulcan Capital Private Equity Inc. is the managing member of Vulcan Capital Private Equity Management I LLC, which is the manager of Vulcan Capital Private Equity I LLC. Paul Allen is the sole stockholder of Vulcan Capital Private Equity Inc., and, as such, possesses sole voting and investment power over the shares held by Vulcan Wealth Management LLC. Mr. Allen disclaims beneficial ownership of the shares held by Vulcan Wealth Management LLC, except to the extent of his pecuniary interest therein.</remarks>

    <ownerSignature>
        <signatureName>/s/ Vulcan Wealth Management LLC, by T. Geoff McKay, Vice President</signatureName>
        <signatureDate>2013-07-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Paul G. Allen, by Paul Ghaffari, Attorney-in-Fact</signatureName>
        <signatureDate>2013-07-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
