519 institutions reported holding $7.34B of JANUS HENDERSON GROUP PLC (JHG) in SEC 13F filings for 2026-06-30. Largest institutional holders: TRIAN FUND MANAGEMENT, L.P. ($1.33B), BlackRock, Inc. ($719.3M), VANGUARD GROUP INC ($436.7M), GLAZER CAPITAL, LLC ($324.2M), Qube Research & Technologies Ltd ($306.6M). Source: SEC Form 13F.
Source: SEC Form 13F filings · as of 2026-06-30