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        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>true</returnCopyFlag>
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      <filer>
        <credentials>
          <cik>0001097833</cik>
          <ccc>XXXXXXXX</ccc>
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      <periodOfReport>12-31-2025</periodOfReport>
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        <name>OPUS INVESTMENT MANAGEMENT INC</name>
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          <com:street1>440 LINCOLN STREET</com:street1>
          <com:street2>N460</com:street2>
          <com:city>WORCESTER</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01653</com:zipCode>
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      <provideInfoForInstruction5>N</provideInfoForInstruction5>
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    <signatureBlock>
      <name>Lindsay F. Greenfield</name>
      <title>SVP CHIEF INVESTMENT OFFICER</title>
      <phone>508-855-2216</phone>
      <signature>/s/ Lindsay F. Greenfield</signature>
      <city>Worcester</city>
      <stateOrCountry>MA</stateOrCountry>
      <signatureDate>02-11-2026</signatureDate>
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            <name>HANOVER INSURANCE GROUP, INC.</name>
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