Affiliated Managers Group, Inc. (AMG) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

163,520Shares held by institutions

$44,124,237Value of institutional holdings

81.90%Institutional ownership %

1.23%Shares Changed QoQ

431No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Affiliated Managers Group, Inc. (NYSE:AMG) appears in 501 institutional 13F filings for the quarter ending December 2025.

These investors held 80.5% of outstanding shares in December 2025, down from 82.0% in September 2025.
Their total shares held in AMG increased 0.49% quarter over quarter, and separately, investors owning Affiliated Managers increased 24.63% from a year ago.
Activity in AMG broke down as 239 buyers, 170 sellers, and 92 unchanged among 501 total holders.
Altogether, these fund groups held 26.57Mn shares in AMG by December 2025, up by 128.31K shares quarter on quarter, and down 4.8Mn shares year over year.
BlackRock, Inc. is the top holder of Affiliated Managers as of December 31, 2025, with 2.8Mn shares representing 8.48% of outstanding stock.
Top purchasers of AMG stock for the quarter ending December 2025 included FULLER & THALER ASSET MANAGEMENT, INC. (800.9K), NORGES BANK (394.56K), NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO (193.37K), Artisan Partners Limited Partnership (130.11K), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (122.9K).
The largest sellers of Affiliated Managers for the quarter ending December 2025 were Clarkston Capital Partners, LLC (328.21K), CITADEL ADVISORS LLC (325.7K), Morgan Stanley (235.8K), MILLENNIUM MANAGEMENT LLC (221.1K), JBF Capital, Inc. (166.2K).
Per Business Quant, the top 10 investors in AMG for the quarter ending December 2025 include BlackRock, Inc. (2.8Mn), VANGUARD GROUP INC (2.68Mn), Morgan Stanley (1.71Mn), FULLER & THALER ASSET MANAGEMENT, INC. (1.37Mn), ARIEL INVESTMENTS, LLC (1.18Mn), Boston Partners (1.14Mn), State Street Corp (929.4K), Clarkston Capital Partners, LLC (904.12K), MILLENNIUM MANAGEMENT LLC (796.01K), DIMENSIONAL FUND ADVISORS LP (699.45K).

502 Institutional Holders

163,520 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	-22,689	-0.80%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	-88,693	-3.20%	$0.00
UBS Group AG	31 Dec, 2025	-54,794	-15.65%	$0.00
Barclays Plc	31 Dec, 2025	-94,725	-76.52%	$0.00
Morgan Stanley	31 Dec, 2025	-235,797	-12.14%	$0.00
Holocene Advisors, LP	31 Dec, 2025	-69,925	-27.54%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	20,400	1,387.76%	$0.00
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	800,901	140.44%	$0.00
Polar Capital Holdings Plc	31 Dec, 2025	28,722	36.58%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	3,446	108.50%	$0.00
ARIEL INVESTMENTS, LLC	31 Dec, 2025	-81,601	-6.46%	$0.00
Concentric Capital Strategies, LP	31 Dec, 2025	39,783	66.12%	$0.00
Bank of New Hampshire	31 Dec, 2025	0	0.00%	$0.00
Boston Partners	31 Dec, 2025	-20,634	-1.78%	$0.00
Treasurer of the State of North Carolina	31 Dec, 2025	-1,005	-1.05%	$0.00
State Street Corp	31 Dec, 2025	-34,311	-3.56%	$0.00
Engineers Gate Manager LP	31 Dec, 2025	89,197	2,873.61%	$0.00
Clarkston Capital Partners, LLC	31 Dec, 2025	-328,214	-26.63%	$0.00
Aerodigm Wealth, LLC	31 Dec, 2025	88,749	0.00%	$0.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	-221,103	-21.74%	$0.00

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