WILLIAM B. CASSIDY - 27 Feb 2026 Form 4 Insider Report for JANUS HENDERSON GROUP PLC (JHG)

Role: Chief Technology Officer
Signature: /s/ Lisa Kish, by Power of Attorney for William Cassidy
Issuer symbol: JHG
Transactions as of: 27 Feb 2026
Net transactions value: -$194,121
Form type: 4
Filing time: 03 Mar 2026, 19:15:24 UTC
Previous filing: 04 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
CASSIDY WILLIAM B	Chief Technology Officer	201 BISHOPGATE, LONDON, UNITED KINGDOM	/s/ Lisa Kish, by Power of Attorney for William Cassidy	03 Mar 2026	0002044423

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	JHG	Common Stock	Award	$972,013	+19,837	+17%	$49.00	135,886	27 Feb 2026	Direct	F1, F2
transaction	JHG	Common Stock	Sale	$885,820	-16,947	-12%	$52.27	118,939	27 Feb 2026	Direct
transaction	JHG	Common Stock	Tax liability	$280,314	-5,400	-4.5%	$51.91	113,539	02 Mar 2026	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents a grant of restricted stock units which vests in three equal annual installments beginning one year after the date of grant.
F2	Includes shares purchased under the Issuer's Employee Stock Purchase Plan.
F3	Represents the number of shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.