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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-06-06</periodOfReport>

    <issuer>
        <issuerCik>0001094831</issuerCik>
        <issuerName>BGC Partners, Inc.</issuerName>
        <issuerTradingSymbol>BGCP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001479226</rptOwnerCik>
            <rptOwnerName>Curwood Stephen T</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O BGC PARTNERS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>499 PARK AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2017-06-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>4136</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>25802</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The 4,136 shares of Class A Common Stock are represented by 4,136 restricted stock units (&quot;RSUs&quot;) granted under the BGC Partners, Inc. Seventh Amended and Restated Long Term Incentive Plan.  Each RSU represents a contingent right to receive one share of Class A Common Stock.  Of the 4,136 RSUs, 2,068 RSUs will vest on June 6, 2018 and 2,068 RSUs will vest on June 6, 2019, provided that the reporting person continues to serve as a member of the Board of Directors on such dates.</footnote>
        <footnote id="F2">Includes 5,650 RSUs granted on June 22, 2016, of which 2,825 RSUs will vest on June 22, 2017 and 2,825 RSUs will vest on June 22, 2018, provided that that the reporting person continues to serve as a member of the Company's Board of Directors on such dates.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Stephen T. Curwood</signatureName>
        <signatureDate>2017-06-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
