    <SEC-DOCUMENT>0001308179-25-000184-index.html : 20250321
    <SEC-HEADER>0001308179-25-000184.hdr.sgml : 20250321
    <ACCEPTANCE-DATETIME>20250321090202
    ACCESSION NUMBER:		0001308179-25-000184
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		6
    FILED AS OF DATE:		20250321
    DATE AS OF CHANGE:		20250321

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			JANUS HENDERSON GROUP PLC
    		CENTRAL INDEX KEY:			0001274173
    		STANDARD INDUSTRIAL CLASSIFICATION:	INVESTMENT ADVICE [6282]
    		ORGANIZATION NAME:           	02 Finance
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			Y9
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38103
    		FILM NUMBER:		25758687

    	BUSINESS ADDRESS:
    		STREET 1:		201 BISHOPSGATE
    		CITY:			LONDON
    		STATE:			X0
    		ZIP:			EC2M 3AE
    		BUSINESS PHONE:		442078181818

    	MAIL ADDRESS:
    		STREET 1:		201 BISHOPSGATE
    		CITY:			LONDON
    		STATE:			X0
    		ZIP:			EC2M 3AE

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	HENDERSON GROUP PLC
    		DATE OF NAME CHANGE:	20050511

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	HHG PLC
    		DATE OF NAME CHANGE:	20031223
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>jhg013443-defa14a.htm
    <DESCRIPTION>DEFINITIVE ADDITIONAL PROXY SOLICITING MATERIALS
    <TEXT>
    Document 1 - file: jhg013443-defa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>check01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: check01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>uncheck.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: uncheck.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>logo.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: logo.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>ljhg_notice1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: ljhg_notice1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ljhg_notice2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: ljhg_notice2.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>