Acadian Asset Management Inc. (AAMI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

11,499,448Shares held by institutions

$599,581,219Value of institutional holdings

98.71%Institutional ownership %

-0.44%Shares Changed QoQ

216No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Acadian Asset Management Inc. (NYSE:AAMI) has 248 institutional investors that have filed 13F reports for the period ending December 2025.

Collectively, these holders controlled 98.9% of Acadian Asset Management's outstanding shares in December 2025, down from 99.0% in September 2025.
Their total shares held in AAMI increased 2.33% quarter over quarter, and separately, investors owning Acadian Asset Management increased 39.33% from a year ago.
Activity in AAMI broke down as 121 buyers, 98 sellers, and 29 unchanged among 248 total holders.
The aggregate institutional position in Acadian Asset Management amounted to 35.4Mn shares as of December 2025, up by 807.3K shares quarter on quarter, and down 2.9Mn shares year over year.
PAULSON & CO. INC. is the top holder of Acadian Asset Management as of December 31, 2025, with 7.74Mn shares representing 21.63% of outstanding stock.
The largest buyers of Acadian Asset Management for the quarter ending December 2025 were Woodline Partners LP (488.11K), SG Americas Securities, LLC (335.87K), SOROS FUND MANAGEMENT LLC (280.24K), Federated Hermes, Inc. (215.65K), JENNISON ASSOCIATES LLC (179.38K).
The largest sales of AAMI for the quarter ending December 2025 came from TUDOR INVESTMENT CORP ET AL (350.0K), Empyrean Capital Partners, LP (136.55K), DEUTSCHE BANK AG\ (130.72K), MILLENNIUM MANAGEMENT LLC (113.35K), EJF Capital LP (110.9K).
According to Business Quant data, leading holders of AAMI for December 2025 are PAULSON & CO. INC. (7.74Mn), BlackRock, Inc. (4.66Mn), VANGUARD GROUP INC (2.34Mn), JENNISON ASSOCIATES LLC (1.91Mn), Empyrean Capital Partners, LP (1.4Mn), State Street Corp (1.21Mn), DIMENSIONAL FUND ADVISORS LP (909.21K), Impax Asset Management Group plc (845.45K), SOROS FUND MANAGEMENT LLC (737.37K), GEODE CAPITAL MANAGEMENT, LLC (685.27K).

248 Institutional Holders

11,499,448 Total Shares Held

Rows:

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Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	-107,364	-2.25%	$0.00
PAULSON & CO. INC.	31 Dec, 2025	0	0.00%	$0.00
Impax Asset Management Group plc	31 Dec, 2025	79,967	10.45%	$0.00
Barclays Plc	31 Dec, 2025	-68,762	-55.36%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	-13,223	-0.56%	$0.00
Nuveen, LLC	31 Dec, 2025	11,590	1.81%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	-594	-2.24%	$0.00
JENNISON ASSOCIATES LLC	31 Dec, 2025	179,380	10.37%	$0.00
Woodline Partners LP	31 Dec, 2025	488,109	687.65%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	-42	-13.64%	$0.00
Empyrean Capital Partners, LP	31 Dec, 2025	-136,546	-8.86%	$0.00
North Reef Capital Management LP	31 Dec, 2025	-67,530	-13.20%	$0.00
State Street Corp	31 Dec, 2025	5,541	0.46%	$0.00
Systematic Alpha Investments, LLC	31 Dec, 2025	0	0.00%	$0.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	-44,169	-4.63%	$0.00
Allspring Global Investments Holdings, LLC	31 Dec, 2025	79,126	27.38%	$0.00
SOROS FUND MANAGEMENT LLC	31 Dec, 2025	280,239	61.30%	$0.00
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	31 Dec, 2025	-26,232	-9.32%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	29,082	4.43%	$0.00
Qube Research & Technologies Ltd	31 Dec, 2025	6,592	3.99%	$0.00

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