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  <schemaVersion>X0202</schemaVersion>
  <headerData>
    <submissionType>13F-HR/A</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <filer>
        <credentials>
          <cik>0001279936</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>09-30-2025</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>09-30-2025</reportCalendarOrQuarter>
      <isAmendment>true</isAmendment>
      <amendmentNo>1</amendmentNo>
      <amendmentInfo>
        <amendmentType>RESTATEMENT</amendmentType>
      </amendmentInfo>
      <filingManager>
        <name>CANTILLON CAPITAL MANAGEMENT LLC</name>
        <address>
          <com:street1>499 PARK AVENUE</com:street1>
          <com:street2>9TH FLOOR</com:street2>
          <com:city>NEW YORK</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10022</com:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-10729</form13FFileNumber>
      <crdNumber>000137895</crdNumber>
      <secFileNumber>801-65611</secFileNumber>
      <provideInfoForInstruction5>Y</provideInfoForInstruction5>
      <additionalInformation>The original 13F filing for the quarter ended 9.30.25 inadvertently listed the Filer as having "sole" voting authority for certain positions, which should have been listed as "None."  This amendment revises the "Sole" and "None" Voting Authority column to correctly show the positions for which the Filer has "sole" voting authority and the positions for which the Filer has "None."</additionalInformation>
    </coverPage>
    <signatureBlock>
      <name>Kevin S. Aarons</name>
      <title>Chief Operating Officer</title>
      <phone>212-603-3300</phone>
      <signature>/s/ Kevin S. Aarons</signature>
      <city>NEW YORK</city>
      <stateOrCountry>NY</stateOrCountry>
      <signatureDate>02-17-2026</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount>1</otherIncludedManagersCount>
      <tableEntryTotal>76</tableEntryTotal>
      <tableValueTotal>18162382853</tableValueTotal>
      <otherManagers2Info>
        <otherManager2>
          <sequenceNumber>1</sequenceNumber>
          <otherManager>
            <cik>0001352269</cik>
            <form13FFileNumber>028-11587</form13FFileNumber>
            <crdNumber>000139303</crdNumber>
            <secFileNumber>801-66104</secFileNumber>
            <name>Cantillon Capital Management LLP</name>
          </otherManager>
        </otherManager2>
      </otherManagers2Info>
    </summaryPage>
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