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

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-08-17</periodOfReport>

    <issuer>
        <issuerCik>0001690680</issuerCik>
        <issuerName>NEWMARK GROUP, INC.</issuerName>
        <issuerTradingSymbol>NMRK</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001388845</rptOwnerCik>
            <rptOwnerName>Gosin Barry M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>false</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O NEWMARK GROUP, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>125 PARK AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>Chief Executive Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2026-08-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3571183</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>15.13</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>328812</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On August 17, 2026, Newmark Group, Inc. (the &quot;Company&quot;) repurchased an aggregate of 3,571,183 shares of its Class A common stock, par value $0.01 per share (&quot;Class A Common Stock&quot;) beneficially owned by the reporting person. The sale price per share was the closing price per share of a share of the Class A Common Stock on the Nasdaq Global Select Market on August 17, 2026. The transaction was approved by the Audit Committee and Compensation Committee of the Company pursuant to the Company's stock buyback authorization and is exempt pursuant to Rule 16b-3 under the Securities Exchange Act of 1934, as amended.</footnote>
        <footnote id="F2">Includes 300,000 shares held by the reporting person that were inadvertently omitted from the amount of securities beneficially owned due to an administrative error on the Forms 4 filed on December 31, 2025 and July 30, 2026.  Mr. Gosin's holdings as reported on this Form 4 do not include the additional non-exchangeable partnership units issued to him under his employment agreements that have not been granted exchange rights.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Barry M. Gosin</signatureName>
        <signatureDate>2026-08-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
