Jay C. Horgen Affiliated Managers Group, Inc. (AMG) insider trading activity

Jay C. Horgen is Chief Executive Officer of AFFILIATED MANAGERS GROUP, INC.. Currently has a direct ownership of 484,322 shares of AMG, which is worth approximately $106 Million. The most recent transaction as insider was on Aug 12, 2025, when has been sold 45,607 shares (Common Stock) at a price of $219.7 per share, resulting in proceeds of $10,019,857. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 484K

9.79% 3M change

51.82% 12M change

Total Value Held $106 Million

Jay C. Horgen Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Aug 12 2025	SELL Payment of exercise price or tax liability	$10,019,857 $219.7 p/Share	45,607 Reduced 8.61%	484,322 Common Stock
Aug 12 2025	BUY Exercise of conversion of derivative security	$5,586,750 $74.49 p/Share	75,000 Added 12.4%	529,929 Common Stock
Jul 02 2025	SELL Bona fide gift	-	14,000 Reduced 2.99%	454,929 Common Stock
Jul 01 2025	SELL Payment of exercise price or tax liability	$9,377,795 $198.72 p/Share	47,191 Reduced 9.14%	468,929 Common Stock
Jul 01 2025	BUY Exercise of conversion of derivative security	$5,586,750 $74.49 p/Share	75,000 Added 12.69%	516,120 Common Stock
Mar 05 2025	SELL Payment of exercise price or tax liability	$4,403,180 $165.72 p/Share	26,570 Reduced 5.68%	441,120 Common Stock
Mar 05 2025	BUY Exercise of conversion of derivative security	-	16,693 Added 3.83%	419,439 Common Stock
Mar 05 2025	BUY Grant, award, or other acquisition	-	48,251 Added 9.35%	467,690 Common Stock
Oct 02 2024	SELL Payment of exercise price or tax liability	$11,757,707 $180.25 p/Share	65,230 Reduced 13.94%	402,746 Common Stock
Oct 02 2024	BUY Exercise of conversion of derivative security	$7,448,999 $74.49 p/Share	100,000 Added 17.61%	467,976 Common Stock
Aug 20 2024	SELL Open market or private sale	$1,580,349 $169.93 p/Share	9,300 Reduced 2.47%	367,976 Common Stock
Aug 19 2024	SELL Payment of exercise price or tax liability	$22,829,216 $172.0 p/Share	132,728 Reduced 25.57%	386,276 Common Stock
Aug 19 2024	SELL Open market or private sale	$1,547,820 $171.98 p/Share	9,000 Reduced 2.33%	377,276 Common Stock
Aug 19 2024	BUY Exercise of conversion of derivative security	$14,897,999 $74.49 p/Share	200,000 Added 27.82%	519,004 Common Stock
Mar 05 2024	SELL Payment of exercise price or tax liability	$2,264,680 $158.58 p/Share	14,281 Reduced 4.28%	319,004 Common Stock
Mar 05 2024	BUY Grant, award, or other acquisition	-	22,611 Added 6.35%	333,285 Common Stock
Mar 05 2024	BUY Exercise of conversion of derivative security	-	12,767 Added 3.95%	310,674 Common Stock
Jan 01 2024	SELL Payment of exercise price or tax liability	$358,108 $151.42 p/Share	2,365 Reduced 0.79%	297,907 Common Stock
Jan 01 2024	BUY Exercise of conversion of derivative security	-	5,792 Added 1.89%	300,272 Common Stock
Aug 15 2023	SELL Payment of exercise price or tax liability	$2,598,936 $133.04 p/Share	19,535 Reduced 6.22%	294,480 Common Stock
Aug 15 2023	BUY Exercise of conversion of derivative security	-	47,990 Added 13.26%	314,015 Common Stock
Mar 05 2023	SELL Payment of exercise price or tax liability	$4,483,114 $160.76 p/Share	27,887 Reduced 9.49%	266,025 Common Stock
Mar 05 2023	BUY Grant, award, or other acquisition	-	60,814 Added 17.53%	286,038 Common Stock
Mar 05 2023	BUY Exercise of conversion of derivative security	-	7,874 Added 2.61%	293,912 Common Stock
Jan 01 2023	SELL Payment of exercise price or tax liability	$577,002 $158.43 p/Share	3,642 Reduced 1.59%	225,224 Common Stock

JCH

Jay C. Horgen

Chief Executive Officer

West Palm Beach, FL

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