Acadian Asset ManagementAAMI
13F holders, Q1 2026 (March 31)256holders
32new positions
32sold out
7famous investors
$54.43avg. 13F price*
At the end of Q1 2026, 256 institutions reported holding Acadian Asset Management Inc. (AAMI) in their 13F filings, unchanged from Q4 2025. 32 opened new positions and 32 sold out. The largest holders were Paulson & Co. ($421.4M), BlackRock, Inc. ($248.9M) and Jennison Associates LLC ($110.0M). 7 famous investors held it, including John Paulson (13.5% of Paulson & Co.'s portfolio), George Soros (0.7% of Soros Fund Management's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Acadian Asset Management Inc.
- CUSIP
- 10948W103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 32 | $58.8M |
| Exits | 32 | $18.9M |
All 13F filers, Q4 2025 → Q1 2026: 2,980,909 shares bought and 1,997,371 shares sold, net +983,538 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 256 holders
| Paulson & Co. | 13.54% | No change | 7,743,282 | $421.4M |
| BlackRock, Inc. | 0.00% | Reduce -1.7% | 4,574,232 | $248.9M |
| Jennison Associates LLC | 0.08% | Add +5.9% | 2,022,207 | $110.0M |
| Empyrean Capital Partners, LP | 2.53% | Reduce -6.9% | 1,308,190 | $71.2M |
| State Street Corp. | 0.00% | Add +0.3% | 1,209,440 | $65.8M |
| Vanguard Capital Management LLC | 0.00% | — | 1,158,887 | $63.1M |
| Dimensional Fund Advisors LP | 0.01% | Reduce -0.5% | 904,549 | $49.2M |
| Vanguard Portfolio Management LLC | 0.00% | — | 883,909 | $48.1M |
| Impax Asset Management Group plc | 0.31% | Reduce -2.6% | 823,323 | $44.8M |
| Geode Capital Management, LLC | 0.00% | Add +9.1% | 747,822 | $40.7M |
| Woodline Partners LP | 0.14% | Add +25.5% | 701,720 | $38.2M |
| Soros Fund Management | 0.65% | Reduce -12.0% | 648,807 | $35.3M |
| SG Americas Securities, LLC | 0.04% | Add +67.9% | 603,683 | $32.9M |
| Nuveen, LLC | 0.01% | Reduce -9.8% | 588,464 | $32.0M |
| Federated Hermes, Inc. | 0.05% | Add +1.8% | 568,320 | $30.9M |
| Morgan Stanley | 0.00% | Add +1.0% | 537,643 | $29.3M |
| Two Sigma Investments, LP | 0.02% | Add +68.9% | 478,814 | $26.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -5.6% | 453,320 | $24.7M |
| Allspring Global Investments Holdings, LLC | 0.04% | Add +13.9% | 419,239 | $23.6M |
| Invesco Ltd. | 0.00% | Reduce -1.9% | 412,702 | $22.5M |
| GW&K Investment Management, LLC | 0.18% | Reduce -9.0% | 375,977 | $20.5M |
| Systematic Alpha Investments, LLC | 0.71% | No change | 370,108 | $20.1M |
| Azora Capital LP | 1.18% | New | 329,349 | $17.9M |
| Jacobs Levy Equity Management, Inc. | 0.07% | Reduce -24.1% | 318,131 | $17.3M |
| Boston Trust Walden Corp | 0.13% | New | 281,604 | $15.3M |
| Northern Trust Corp. | 0.00% | Add +0.0% | 279,061 | $15.2M |
| William Blair Investment Management, LLC | 0.05% | Add +3.4% | 263,737 | $14.4M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Reduce -53.1% | 241,200 | $13.1M |
| North Reef Capital Management LP | 0.41% | Reduce -50.4% | 220,239 | $12.0M |
| Goldman Sachs Group Inc. | 0.00% | Add +4.9% | 219,292 | $11.9M |
| UBS Group AG | 0.00% | Add +128.1% | 216,817 | $11.8M |
| FMR LLC | 0.00% | Add +19.1% | 213,004 | $11.6M |
| Principal Financial Group Inc. | 0.01% | Add +13.8% | 204,527 | $11.1M |
| Bank of New York Mellon Corp | 0.00% | Reduce -3.0% | 196,225 | $10.7M |
| Janus Henderson Group PLC | 0.01% | Add +1471.1% | 195,337 | $10.6M |
| First Trust Advisors LP | 0.01% | Add +14.7% | 194,170 | $10.6M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 184,875 | $10.1M |
| Allianz Asset Management GmbH | 0.01% | Add +69.5% | 181,393 | $9.9M |
| Qube Research & Technologies Ltd | 0.01% | Add +1.9% | 174,938 | $9.5M |
| AQR Capital Management | 0.00% | Add +72.7% | 159,669 | $8.7M |
| Public Sector Pension Investment Board | 0.03% | Add +19.8% | 147,353 | $8.0M |
| Bank of America Corp. | 0.00% | Add +36.8% | 137,218 | $7.5M |
| Jupiter Asset Management Ltd. | 0.04% | Add +19.9% | 131,673 | $7.2M |
| Deutsche Bank AG | 0.00% | Add +420.3% | 119,736 | $6.5M |
| Man Group plc | 0.01% | Reduce -14.7% | 118,071 | $6.4M |
| Brightlight Capital Management LP | 5.38% | Reduce -7.1% | 100,200 | $5.5M |
| Algert Global LLC | 0.08% | Reduce -15.9% | 96,687 | $5.3M |
| JPMorgan Chase & Co. | 0.00% | Reduce -35.2% | 97,620 | $5.1M |
| Karl Kapital LLC | 3.39% | New | 90,048 | $4.9M |
| Cannell & Spears LLC | 0.09% | Add +42.7% | 84,459 | $4.6M |
| LSV Asset Management | 0.01% | No change | 82,300 | $4.5M |
| Ameriprise Financial Inc. | 0.00% | Add +2.1% | 81,107 | $4.4M |
| Citadel Advisors | 0.00% | Reduce -20.9% | 81,023 | $4.4M |
| American Century Companies Inc. | 0.00% | Add +4.5% | 80,776 | $4.4M |
| Vident Advisory, LLC | 0.04% | Add +1331.2% | 78,642 | $4.3M |
| Rhumbline Advisers | 0.00% | Reduce -3.7% | 72,136 | $3.9M |
| Millennium Management | 0.00% | Reduce -22.0% | 69,334 | $3.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +1.2% | 67,421 | $3.7M |
| Legal & General Group Plc | 0.00% | Reduce -9.2% | 64,288 | $3.5M |
| Victory Capital Management Inc. | 0.00% | Reduce -8.5% | 63,557 | $3.5M |
| Envestnet Asset Management Inc. | 0.00% | Add +10.8% | 62,788 | $3.4M |
| Kestrel Investment Management Corp. | 2.03% | Reduce -1.3% | 62,381 | $3.4M |
| Renaissance Technologies | 0.01% | Reduce -38.4% | 60,544 | $3.3M |
| Linden Thomas Advisory Services, LLC | 0.31% | Add +97.7% | 59,448 | $3.2M |
| Credit Agricole S A | 0.01% | No change | 58,389 | $3.2M |
| Boston Partners | 0.00% | Add +4.4% | 57,533 | $3.1M |
| Swiss National Bank | 0.00% | No change | 56,526 | $3.1M |
| D. E. Shaw & Co. | 0.00% | Reduce -51.0% | 56,410 | $3.1M |
| Franklin Resources Inc. | 0.00% | Add +26.2% | 54,244 | $3.0M |
| Engineers Gate Manager LP | 0.04% | Add +5.3% | 52,696 | $2.9M |
| Zacks Investment Management | 0.02% | Add +31.2% | 50,853 | $2.8M |
| Assenagon Asset Management S.A. | 0.00% | New | 45,836 | $2.5M |
| Hussman Strategic Advisors, Inc. | 0.49% | New | 42,000 | $2.3M |
| EFG International AG | 0.05% | New | 41,435 | $2.3M |
| State Board of Administration of Florida Retirement System | 0.00% | Add +77.4% | 40,459 | $2.2M |
| Redhawk Wealth Advisors, Inc. | 0.24% | New | 40,092 | $2.2M |
| Intech Investment Management LLC | 0.02% | Add +216.3% | 39,108 | $2.1M |
| State of Wisconsin Investment Board | 0.00% | Reduce -13.9% | 35,418 | $1.9M |
| Susquehanna Portfolio Strategies, LLC | 0.03% | No change | 35,357 | $1.9M |
| Kendall Capital Management | 0.38% | Add +6.8% | 34,460 | $1.9M |
| BNP Paribas Financial Markets | 0.00% | Reduce -18.9% | 34,194 | $1.9M |
| CWA Asset Management Group, LLC | 0.06% | New | 33,388 | $1.8M |
| Alliancebernstein L.P. | 0.00% | No change | 38,087 | $1.8M |
| Royce & Associates LP | 0.02% | Reduce -18.0% | 32,218 | $1.8M |
| Jane Street Group, LLC | 0.00% | New | 31,897 | $1.7M |
| Dark Forest Capital Management LP | 0.15% | Reduce -18.1% | 30,948 | $1.7M |
| Creative Planning | 0.00% | Add +22.7% | 30,467 | $1.7M |
| DGS Capital Management, LLC | 0.26% | Add +0.3% | 29,489 | $1.6M |
| Thornburg Investment Management Inc. | 0.02% | New | 27,786 | $1.5M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Reduce -2.8% | 27,191 | $1.5M |
| Teacher Retirement System of Texas | 0.01% | Reduce -56.5% | 27,166 | $1.5M |
| California State Teachers Retirement System | 0.00% | Reduce -0.7% | 27,070 | $1.5M |
| Prudential Financial Inc. | 0.00% | Reduce -17.5% | 27,036 | $1.5M |
| Sei Investments Co. | 0.00% | Add +58.5% | 26,930 | $1.5M |
| Russell Investments Group, Ltd. | 0.00% | Reduce -16.3% | 26,901 | $1.5M |
| HRT Financial LP | 0.00% | Reduce -20.1% | 25,892 | $1.4M |
| State of Tennessee, Department of Treasury | 0.00% | Add +309.1% | 24,827 | $1.4M |
| CANADA LIFE ASSURANCE Co | 0.00% | No change | 24,069 | $1.3M |
| LPL Financial LLC | 0.00% | Reduce -6.8% | 23,373 | $1.3M |
| Voleon Capital Management LP | 0.03% | Reduce -45.6% | 23,036 | $1.3M |
"% of holder's portfolio" is AAMI's weight in each manager's 13F, not the share of Acadian Asset Management Inc. the manager owns.