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

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-02-09</periodOfReport>

    <issuer>
        <issuerCik>0001596967</issuerCik>
        <issuerName>Moelis &amp; Co</issuerName>
        <issuerTradingSymbol>MC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001604691</rptOwnerCik>
            <rptOwnerName>RAICH JEFFREY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>399 PARK AVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Executive Vice Chairman, MD</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>2024 Vested LP Units of MCGEH (Granted February 13, 2025)</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2026-02-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>35705</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>35705</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35705</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>2024 LTI LP Units of MCGEH (Granted February 13, 2025)</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2026-02-09</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>12751</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>12751</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12751</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Limited partnership units of MCGEH may be redeemed by the holder for shares of Class A Common Stock on a one-for-one basis pursuant to the terms of the Second Amended and Restated Limited Partnership Agreement of MCGEH.</footnote>
        <footnote id="F2">On February 13, 2025, the Reporting Person was granted a profits interest award in the form of LP Units in connection with compensation for the 2024 fiscal year (the &quot;2024 Vested LP Units&quot;).  The 2024 Vested LP Units vest at grant and may be redeemed as follows: (a) 40% on February 23, 2027, and (b) and 20% on each of February 23, 2028, February 23, 2029 and February 23, 2030. These 2024 Vested LP units may be redeemded by the holder for shares of Class A Common Stock on a one-for-one basis beginning on the third anniversary of the grant date (February 2028) and a sufficient amount of profits have been allocated to the holder of the LP Units (the &quot;Book-Up&quot;). On February 9, 2026, the Issuers Compensation Committee certified the achievement of the Book-Up. In addition, the 2024 Vested LP Units are subject to sale and non-compete restrictions through the fifth anniversary of the grant date. The redemption rights described herein do not expire.</footnote>
        <footnote id="F3">On February 13, 2025, the Reporting Person was granted a profits interest award in the form of Long Term Incentive LP Units in connection with compensation for the 2024 fiscal year (the &quot;2024 LTI LP Units&quot;). The 2024 LTI  LP Units vest over three years as follows: 33% vests on each February 23, 2028, February 23, 2029 and February 23, 2030. These 2024 LTI LP Units may be redeemed by the holder for shares of Class A Common Stock on a one-for-one basis after the  LTI LP Units become vested and a sufficient amount of profits have been allocated to the holder of the LTI LP Units (the &quot;Book-Up&quot;). On February 9, 2026, the Issuers Compensation Committee certified the achievement of the Book-Up. These 2024 LTI LP Units remain subject to the time-based vesting requirements described herein. The redemption rights described herein do not expire.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Osamu Watanabe as attorney-in-fact for Jeffrey Raich</signatureName>
        <signatureDate>2026-02-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
