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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-08-26</periodOfReport>

    <notSubjectToSection16>true</notSubjectToSection16>

    <issuer>
        <issuerCik>0001799208</issuerCik>
        <issuerName>Dun &amp; Bradstreet Holdings, Inc.</issuerName>
        <issuerTradingSymbol>DNB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001704720</rptOwnerCik>
            <rptOwnerName>Cannae Holdings, Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1701 VILLAGE CENTER CIRCLE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LAS VEGAS</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001546148</rptOwnerCik>
            <rptOwnerName>Cannae Holdings, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CANNAE HOLDINGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>1701 VILLAGE CENTER CIRCLE</rptOwnerStreet2>
            <rptOwnerCity>LAS VEGAS</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001816417</rptOwnerCik>
            <rptOwnerName>DNB Holdco, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1701 VILLAGE CENTER CIRCLE</rptOwnerStreet1>
            <rptOwnerStreet2>1701 VILLAGE CENTER CIRCLE</rptOwnerStreet2>
            <rptOwnerCity>LAS VEGAS</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-08-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>59048691</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This report is filed by Cannae Holdings, Inc., Cannae Holdings, LLC and DNB Holdco, LLC (collectively, the &quot;Reporting Persons&quot;). DNB Holdco, LLC is a wholly-owned subsidiary of Cannae Holdings, LLC, which in turn is a wholly-owned subsidiary of Cannae Holdings, Inc.</footnote>
        <footnote id="F2">Pursuant to the Agreement and Plan of Merger (the &quot;Merger Agreement&quot;), dated as of March 23, 2025, by and among the Issuer, Denali Intermediate Holdings, Inc., (&quot;Parent&quot;) and Denali Buyer, Inc., a wholly owned subsidiary of Parent, each outstanding share of common stock of the Issuer was cancelled and converted into the right to receive $9.15 in cash per share without interest and subject to deduction for any applicable withholding taxes (the &quot;Merger Consideration&quot;). Accordingly, DNB Holdco, LLC disposed of 24,048,691 share of Common Stock, Cannae Funding D, LLC, a wholly owned subsidiary of DNB Holdco, LLC, disposed of 35,000,000 shares of Common Stock.</footnote>
    </footnotes>

    <remarks>Exhibit 99.1 (Joint Filer Information) is incorporated herein by reference.</remarks>

    <ownerSignature>
        <signatureName>See Exhibit 99.1 for Signatures</signatureName>
        <signatureDate>2025-08-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
