Jay C. Horgen - 01 Jan 2024 Form 4 Insider Report for AFFILIATED MANAGERS GROUP, INC. (AMG)

Role: President and CEO, Director
Signature: /s/ Kavita Padiyar, Attorney-in-Fact
Issuer symbol: AMG
Transactions as of: 01 Jan 2024
Net transactions value: -$358,108
Form type: 4
Filing time: 03 Jan 2024, 17:39:27 UTC
Previous filing: 17 Aug 2023
Next filing: 07 Mar 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMG	Common Stock	Options Exercise	$0	+5,792	+2%	$0.000000	300,272	01 Jan 2024	Direct	F1
transaction	AMG	Common Stock	Tax liability	$358,108	-2,365	-0.79%	$151.42	297,907	01 Jan 2024	Direct	F2
holding	AMG	Common Stock						20,058	01 Jan 2024	By Family Trusts

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	Stock Units	Options Exercise	$0	-5,792	-12%	$0.000000	40,685	01 Jan 2024	Common Stock	5,792		Direct	F1

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

Explanation of Responses:

Id	Content
F1	Reflects the vesting of a previously reported award. Award vests 2021-2024.
F2	Reflects the automatic surrender of shares of common stock to the Company to satisfy tax withholding obligations related to the vesting of the award described above.