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    <submissionType>13F-HR/A</submissionType>
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        <returnCopyFlag>true</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
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      <periodOfReport>06-30-2019</periodOfReport>
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      <isAmendment>true</isAmendment>
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        <name>JANUS HENDERSON GROUP PLC</name>
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          <ns1:city>LONDON</ns1:city>
          <ns1:stateOrCountry>X0</ns1:stateOrCountry>
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      <name>Kristin Mariani</name>
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      <phone>303-333-3863</phone>
      <signature>/s/  Kristin Mariani</signature>
      <city>Denver</city>
      <stateOrCountry>CO</stateOrCountry>
      <signatureDate>08-07-2019</signatureDate>
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