Acadian Asset Management Inc. (AAMI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

35,800,000Shares Outstanding

35,626,476Shares held by institutions

$2,367,735,595Value of institutional holdings

99.52%Institutional ownership %

2.61%Shares Changed QoQ

248No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Acadian Asset Management Inc. (NYSE:AAMI) has 248 institutional investors with active 13F positions as of December 2025.

They owned 98.9% of outstanding stock in December 2025, down from 99.0% the prior quarter.
They increased total shares held in Acadian Asset Management by 2.33% from last quarter, and the number of investors in AAMI increased 39.33% annually.
Activity in AAMI broke down as 121 buyers, 98 sellers, and 29 unchanged among 248 total holders.
Institutional investors collectively held 35.4Mn shares in Acadian Asset Management 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 most significant purchases of AAMI for the quarter ending December 2025 came from Woodline Partners LP (488.11K), SG Americas Securities, LLC (335.87K), SOROS FUND MANAGEMENT LLC (280.24K), Federated Hermes, Inc. (215.65K), Goldman Sachs Group Inc (199.61K).
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), Barclays Plc (126.21K), MILLENNIUM MANAGEMENT LLC (113.35K).
Per Business Quant data, the top 10 holders of Acadian Asset Management for the quarter ending 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

35,626,476 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
PAULSON & CO. INC.	31 Dec, 2025	7,743,282	0	0.00%	$363,934,254.00
BlackRock, Inc.	31 Dec, 2025	4,655,353	-107,364	-2.25%	$218,801,606.00
VANGUARD GROUP INC	31 Dec, 2025	2,335,363	-13,223	-0.56%	$109,762,061.00
JENNISON ASSOCIATES LLC	31 Dec, 2025	1,909,222	179,380	10.37%	$89,733,434.00
Empyrean Capital Partners, LP	31 Dec, 2025	1,404,562	-136,546	-8.86%	$66,014,414.00
State Street Corp	31 Dec, 2025	1,206,244	5,541	0.46%	$56,693,468.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	909,213	-44,169	-4.63%	$42,734,382.00
Impax Asset Management Group plc	31 Dec, 2025	845,451	79,967	10.45%	$39,736,197.00
SOROS FUND MANAGEMENT LLC	31 Dec, 2025	737,367	280,239	61.30%	$34,656,249.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	685,272	29,082	4.43%	$32,212,205.00
Nuveen, LLC	31 Dec, 2025	652,144	11,590	1.81%	$30,650,768.00
Woodline Partners LP	31 Dec, 2025	559,091	488,109	687.65%	$26,277,277.00
Federated Hermes, Inc.	31 Dec, 2025	558,267	215,646	62.94%	$26,238,549.00
Morgan Stanley	31 Dec, 2025	532,515	61,751	13.12%	$25,028,299.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	514,463	-104,881	-16.93%	$24,179,761.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	480,306	31,345	6.98%	$22,574,382.00
North Reef Capital Management LP	31 Dec, 2025	443,922	-67,530	-13.20%	$20,864,334.00
Invesco Ltd.	31 Dec, 2025	420,606	192	0.05%	$19,768,482.00
JACOBS LEVY EQUITY MANAGEMENT, INC	31 Dec, 2025	419,346	2,848	0.68%	$19,709,262.00
Goldman Sachs Group Inc	31 Dec, 2025	418,192	199,606	91.32%	$19,655,034.00

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