MASSACHUSETTS MUTUAL LIFE INSURANCE CO - 21 Dec 2025 SCHEDULE 13D Report for JANUS HENDERSON GROUP PLC Ordinary Shares, $1.50 per share par value (JHG)

Filing Manager: MASSACHUSETTS MUTUAL LIFE INSURANCE CO
Reporting Manager: MASSACHUSETTS MUTUAL LIFE INSURANCE CO
Security: JANUS HENDERSON GROUP PLC Ordinary Shares, $1.50 per share par value
Symbol: JHG
Disclosed Ownership: 9.28K shares
Ownership: 0.1%
Form type: SCHEDULE 13D
Filing time: 23 Dec 2025, 18:06:45 UTC
Date of event: 21 Dec 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
MASSACHUSETTS MUTUAL LIFE INSURANCE CO	0.1%	9.28K	9.28K	0	/s/ Jaime Genua	Jaime Genua, Assistant Secretary	0000225602