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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2024-12-05</periodOfReport>

    <issuer>
        <issuerCik>0001929561</issuerCik>
        <issuerName>RXO, Inc.</issuerName>
        <issuerTradingSymbol>RXO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001732960</rptOwnerCik>
            <rptOwnerName>MFN Partners, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>222 BERKELEY STREET, 13TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001814126</rptOwnerCik>
            <rptOwnerName>MFN Partners GP, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>222 BERKELEY STREET, 13TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001732811</rptOwnerCik>
            <rptOwnerName>MFN Partners Management, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>222 BERKELEY STREET, 13TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001814127</rptOwnerCik>
            <rptOwnerName>MFN Partners Management, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>222 BERKELEY STREET, 13TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001814117</rptOwnerCik>
            <rptOwnerName>DeMichele Michael</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>222 BERKELEY STREET, 13TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001575023</rptOwnerCik>
            <rptOwnerName>NANJI FARHAD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>222 BERKELEY STREET, 13TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02116</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Warrant to Purchase Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.01</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2024-12-05</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2018574</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>20.2</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2018574</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4577327</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Warrant reported herein was purchased on August 12, 2024. Exercise of the Warrant was subject to the approval by the stockholders of the Issuer of the issuance of the underlying shares of Common Stock, pursuant to the applicable rules and regulations of the New York Stock Exchange.  Such approval was obtained on December 5, 2024.</footnote>
        <footnote id="F2">The Warrant is immediately exercisable but can only be exercised to the extent that following such exercise the Reporting Persons' beneficial ownership of the Issuer, together with any attribution parties, does not exceed 19.9%.  The Warrant has no expiration date.</footnote>
        <footnote id="F3">MFN Partners, LP (the &quot;Partnership&quot;) is the holder of the securities reported herein. MFN Partners GP, LLC (&quot;MFN GP&quot;) is the general partner of the Partnership. MFN Partners Management, LP (&quot;MFN Management&quot;) is the investment adviser to the Partnership. MFN Partners Management, LLC (&quot;MFN LLC&quot;) is the general partner of MFN Management. Farhad Nanji and Michael F. DeMichele are managing members of MFN GP and MFN LLC. Each Reporting Person disclaims beneficial ownership of such securities, except to the extent of such Reporting Person's pecuniary interest, if any, therein.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>MFN PARTNERS, LP, By: /s/ Jonathan Reisman, Name: Jonathan Reisman, Title: Authorized Person</signatureName>
        <signatureDate>2024-12-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>MFN PARTNERS GP, LLC, By: /s/ Jonathan Reisman, Name: Jonathan Reisman, Title: Authorized Person</signatureName>
        <signatureDate>2024-12-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>MFN PARTNERS MANAGEMENT, LP, By: /s/ Jonathan Reisman, Name: Jonathan Reisman, Title: Authorized Person</signatureName>
        <signatureDate>2024-12-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>MFN PARTNERS MANAGEMENT, LLC, By: /s/ Jonathan Reisman, Name: Jonathan Reisman, Title: Authorized Person</signatureName>
        <signatureDate>2024-12-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>MICHAEL F. DEMICHELE, By: /s/ Michael F. DeMichele</signatureName>
        <signatureDate>2024-12-09</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>FARHAD NANJI, By: /s/ Farhad Nanji</signatureName>
        <signatureDate>2024-12-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
