<ACCESSION-NUMBER>0001104659-19-005663 <TYPE>8-K <PUBLIC-DOCUMENT-COUNT>48 <PERIOD>20190205 <ITEMS>2.02 <ITEMS>9.01 <FILING-DATE>20190205 <DATE-OF-FILING-DATE-CHANGE>20190205 <FILER> <COMPANY-DATA> <CONFORMED-NAME>JANUS HENDERSON GROUP PLC <CIK>0001274173 <ASSIGNED-SIC>6282 <IRS-NUMBER>000000000 <STATE-OF-INCORPORATION>Y9 <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>8-K <ACT>34 <FILE-NUMBER>001-38103 <FILM-NUMBER>19566109 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>201 BISHOPSGATE <CITY>LONDON <STATE>X0 <ZIP>EC2M 3AE <PHONE>442078181818 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>201 BISHOPSGATE <CITY>LONDON <STATE>X0 <ZIP>EC2M 3AE </MAIL-ADDRESS> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>HENDERSON GROUP PLC <DATE-CHANGED>20050511 </FORMER-COMPANY> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>HHG PLC <DATE-CHANGED>20031223 </FORMER-COMPANY> </FILER>