Affiliated Managers Group, Inc. (AMG) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

31,512,753Shares Outstanding

222,295Shares held by institutions

$71,803,508Value of institutional holdings

80.24%Institutional ownership %

-1.75%Shares Changed QoQ

482No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 482 institutional investors hold a position in Affiliated Managers Group, Inc. (NYSE:AMG).

Affiliated Managers saw its institutional ownership percentage fell to 80.2% in December 2025 from 83.8% in September 2025.
The company experienced a -1.75% quarterly change in institutional shares held, alongside an increase of 19.90% in total owners annually.
Of these 482 institutional investors, 233 increased their holdings in Affiliated Managers, while 160 of them reduced positions, and 89 investors maintained their exposure.
This class of investors decreased its holdings in Affiliated Managers to 25.29Mn shares for the 13F-cycle ending December 2025, down by 451.08K shares quarter on quarter, and down 3.02Mn shares year over year.
BlackRock, Inc. continues to be the largest institutional holder of Affiliated Managers as of December 31, 2025, with a position of 2.80Mn shares, representing 8.88% of the company's outstanding stock.
Among the most significant buyers of Affiliated Managers during December 2025 were NORGES BANK (394.56K), Artisan Partners Limited Partnership (130.11K), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (122.91K), FULLER & THALER ASSET MANAGEMENT, INC. (115.31K), Engineers Gate Manager LP (89.20K).
Leading sellers of Affiliated Managers stock in December 2025 included Clarkston Capital Partners, LLC (328.21K), CITADEL ADVISORS LLC (325.70K), MORGAN STANLEY (235.80K), MILLENNIUM MANAGEMENT LLC (221.10K), JBF Capital, Inc. (166.20K).
The top 10 institutional holders of Affiliated Managers for the quarter ending December 2025 included BlackRock, Inc. (2.80Mn), VANGUARD GROUP INC (2.68Mn), MORGAN STANLEY (1.71Mn), ARIEL INVESTMENTS, LLC (1.18Mn), Boston Partners (1.14Mn), STATE STREET CORP (929.40K), Clarkston Capital Partners, LLC (904.12K), MILLENNIUM MANAGEMENT LLC (796.01K), DIMENSIONAL FUND ADVISORS LP (699.45K), FULLER & THALER ASSET MANAGEMENT, INC. (685.59K).

482 Institutional Holders

222,295 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	2,799,166	-22,689	-0.80%	$806,943,561.00
VANGUARD GROUP INC	31 Dec, 2025	2,683,585	-88,693	-3.20%	$773,623,884.00
MORGAN STANLEY	31 Dec, 2025	1,705,721	-235,797	-12.14%	$491,726,009.00
ARIEL INVESTMENTS, LLC	31 Dec, 2025	1,182,223	-81,601	-6.46%	$340,811,246.00
Boston Partners	31 Dec, 2025	1,136,710	-20,634	-1.78%	$327,757,300.00
STATE STREET CORP	31 Dec, 2025	929,397	-34,311	-3.56%	$267,926,567.00
Clarkston Capital Partners, LLC	31 Dec, 2025	904,119	-328,214	-26.63%	$260,639,425.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	796,010	-221,103	-21.74%	$229,473,763.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	699,448	15,332	2.24%	$201,640,140.00
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	685,588	115,313	20.22%	$197,641,206.00
LYRICAL ASSET MANAGEMENT LP	31 Dec, 2025	551,587	-28,248	-4.87%	$159,011,500.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	551,153	41,322	8.11%	$158,916,400.00
LSV ASSET MANAGEMENT	31 Dec, 2025	473,021	-6,603	-1.38%	$136,362.00
Allianz Asset Management GmbH	31 Dec, 2025	426,649	33,488	8.52%	$122,994,374.00
NORGES BANK	31 Dec, 2025	394,559	394,559	0.00%	$113,743,469.00
NORTHERN TRUST CORP	31 Dec, 2025	325,696	-8,672	-2.59%	$93,891,642.00
CITADEL ADVISORS LLC	31 Dec, 2025	319,437	-325,704	-50.49%	$92,087,298.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	305,596	-6,972	-2.23%	$88,097,215.00
UBS Group AG	31 Dec, 2025	295,418	-54,794	-15.65%	$85,163,102.00
Channing Capital Management, LLC	31 Dec, 2025	290,720	-134,317	-31.60%	$83,808,762.00

1 - 20 of 482

Research Tools