Affiliated Managers Group, Inc. (AMG) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

33,000,000Shares Outstanding

26,798,493Shares held by institutions

$8,155,719,367Value of institutional holdings

81.21%Institutional ownership %

0.65%Shares Changed QoQ

506No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Affiliated Managers Group, Inc. (NYSE:AMG) showed up in the 13F filings of 501 institutional investors as of December 2025.

They owned 80.5% of outstanding stock in December 2025, down from 82.0% the prior quarter.
They increased total shares held in AMG by 0.49% quarter over quarter, and investors in Affiliated Managers increased 24.63% from a year ago.
Of these 501 funds, 239 grew their exposure to Affiliated Managers, 170 cut back, and 92 maintained positions.
The aggregate institutional position in Affiliated Managers amounted to 26.57Mn shares as of December 2025, up by 128.31K shares quarter on quarter, and down 4.8Mn shares year over year.
Retirement Systems of Alabama is the top holder of Affiliated Managers as of December 31, 2025, with 86.24K shares representing 0.26% of outstanding stock.
Leading buyers of Affiliated Managers shares for the quarter ending December 2025 were Oak Thistle LLC (23.14K), Robeco Institutional Asset Management B.V. (14.38K), OPPENHEIMER ASSET MANAGEMENT INC. (11.32K), Janney Montgomery Scott LLC (10.78K), Inspire Investing, LLC (10.61K).
Leading sellers of Affiliated Managers shares for the quarter ending December 2025 were OP Asset Management Ltd (10.24K), Oliver Luxxe Assets LLC (5.31K), REINHART PARTNERS, LLC. (2.0K), MQS Management LLC (1.43K), Sterling Capital Management LLC (958).
Per Business Quant, the top 10 investors in AMG for the quarter ending December 2025 include Retirement Systems of Alabama (86.24K), Robeco Institutional Asset Management B.V. (49.29K), Oak Thistle LLC (31.84K), REINHART PARTNERS, LLC. (26.28K), Sterling Capital Management LLC (23.53K), Amplius Wealth Advisors, LLC (19.62K), Poehling Capital Management, INC. (18.19K), State of Alaska, Department of Revenue (17.8K), MOODY ALDRICH PARTNERS LLC (15.11K), Oliver Luxxe Assets LLC (13.1K).

514 Institutional Holders

26,798,493 Total Shares Held

Rows:

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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
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	1,371,176	800,901	140.44%	$395,282,412.00
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
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
Goldman Sachs Group Inc	31 Dec, 2025	323,302	197,223	156.43%	$93,201,516.00
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

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