Thomas M. Wojcik - 08 Sep 2025 Form 4 Insider Report for AFFILIATED MANAGERS GROUP, INC. (AMG)

Role: President and COO
Signature: /s/ Kavita Padiyar, Attorney-in-Fact
Issuer symbol: AMG
Transactions as of: 08 Sep 2025
Net transactions value: -$17,442,609
Form type: 4
Filing time: 09 Sep 2025, 17:03:55 UTC
Previous filing: 07 Mar 2025
Next filing: 09 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Wojcik Thomas M	President and COO	C/O AFFILIATED MANAGERS GROUP, INC., 777 SOUTH FLAGLER DRIVE, WEST PALM BEACH	/s/ Kavita Padiyar, Attorney-in-Fact	09 Sep 2025	0001776685

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMG	Common Stock	Options Exercise	$12,611,380	+169,303	+142%	$74.49	288,718	08 Sep 2025	Direct
transaction	AMG	Common Stock	Tax liability	$26,357,510	-114,008	-39%	$231.19	174,710	08 Sep 2025	Direct
transaction	AMG	Common Stock	Sale	$3,696,480	-16,000	-9.2%	$231.03	158,710	09 Sep 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AMG	Employee Stock Option (Right to Buy)	Options Exercise	$0	-169,303	-99%	$0.000000	1,342	08 Sep 2025	Common Stock	169,303	$74.49	Direct

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

Explanation of Responses:

Id	Content
F1	The sale reflects the weighted average sales price of the shares sold; the individual transaction prices ranged from $229.95 to $233.05. Specific transaction details will be provided to the SEC upon request.