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

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-09-23</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000037785</issuerCik>
        <issuerName>FMC CORP</issuerName>
        <issuerTradingSymbol>FMC</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002150458</rptOwnerCik>
            <rptOwnerName>Tack Luc Jules R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>TROONSTRAAT 130, RUE DU TRONE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BRUSSELS</rptOwnerCity>
            <rptOwnerNonUSStateTerritory></rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>C9</rptOwnerCountry>
            <rptOwnerZipCode>1050</rptOwnerZipCode>
            <rptOwnerStateDescription>BELGIUM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0002150441</rptOwnerCik>
            <rptOwnerName>Tessenderlo Group NV</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>TROONSTRAAT 130, RUE DU TRONE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BRUSSELS</rptOwnerCity>
            <rptOwnerNonUSStateTerritory></rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>C9</rptOwnerCountry>
            <rptOwnerZipCode>1050</rptOwnerZipCode>
            <rptOwnerStateDescription>BELGIUM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>true</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>31109166</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The securities reported herein are directly beneficially owned by Tessenderlo Group NV. Luc Jules R Tack controls Oostiep Group bv, which is the controlling shareholder of Tessenderlo Group NV. Accordingly, Luc Jules R Tack is the indirect beneficial owner of the securities reported herein.</footnote>
    </footnotes>

    <remarks>Tessenderlo has the right to nominate one member of the issuer's board of directors under the Investor Agreement dated as of September 23, 2026. Accordingly, Tessenderlo may be deemed a &quot;director by deputization&quot; of the issuer for purposes of Section 16 of the Securities Exchange Act of 1934.</remarks>

    <ownerSignature>
        <signatureName>/s/ Luc Jules R Tack</signatureName>
        <signatureDate>2026-09-25</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Luc Jules R Tack</signatureName>
        <signatureDate>2026-09-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
