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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2024-08-06</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001065059</issuerCik>
        <issuerName>CENTRUS ENERGY CORP</issuerName>
        <issuerTradingSymbol>LEU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001842003</rptOwnerCik>
            <rptOwnerName>O'Sullivan Stephanie L.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CENTRUS ENERGY CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>6901 ROCKLEDGE DRIVE, SUITE 800</rptOwnerStreet2>
            <rptOwnerCity>BETHESDA</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>20817</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>Shahram Ghasemian</signatureName>
        <signatureDate>2024-08-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
