Acumen PharmaceuticalsABOS
13F holders, Q2 2025 (June 30)71holders −10
17new positions
27sold out
3famous investors
$1.16avg. 13F price*
At the end of Q2 2025, 71 institutions reported holding Acumen Pharmaceuticals Inc. (ABOS) in their 13F filings, down 10 from Q1 2025. 17 opened new positions and 27 sold out. The largest holders were Ra Capital Management, L.P. ($17.3M), Sands Capital Alternatives, LLC ($4.0M) and Franklin Resources Inc. ($3.6M). 3 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Acumen Pharmaceuticals Inc.
- CUSIP
- 00509G209
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 17 | $678K |
| Exits | 27 | $837K |
All 13F filers, Q1 2025 → Q2 2025: 2,632,397 shares bought and 5,287,947 shares sold, net −2,655,550 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 71 holders
| Ra Capital Management, L.P. | 0.29% | No change | 14,932,063 | $17.3M |
| Sands Capital Alternatives, LLC | 0.78% | No change | 3,417,075 | $4.0M |
| Franklin Resources Inc. | 0.00% | Reduce -2.1% | 3,077,039 | $3.6M |
| FMR LLC | 0.00% | Add +0.2% | 2,029,736 | $2.4M |
| Millennium Management | 0.00% | Add +71.8% | 1,950,120 | $2.3M |
| Vanguard Group Inc. | 0.00% | Reduce -12.8% | 1,689,351 | $2.0M |
| Knollwood Investment Advisory, LLC | 0.18% | No change | 1,628,510 | $1.9M |
| Pathstone Holdings, LLC | 0.00% | Reduce -2.6% | 1,058,531 | $1.2M |
| Alyeska Investment Group, L.P. | 0.00% | No change | 939,603 | $1.1M |
| ADAR1 Capital Management, LLC | 0.17% | Add +526.7% | 916,183 | $1.1M |
| Laurion Capital Management LP | 0.12% | No change | 867,046 | $1.0M |
| Hudson Bay Capital Management LP | 0.01% | Add +7.1% | 825,004 | $957K |
| Two Sigma Advisers, LP | 0.00% | Reduce -8.1% | 426,300 | $495K |
| Geode Capital Management, LLC | 0.00% | Reduce -54.0% | 396,626 | $460K |
| Goldman Sachs Group Inc. | 0.00% | Add +70.6% | 334,683 | $388K |
| BlackRock, Inc. | 0.00% | Reduce -87.5% | 291,957 | $339K |
| Ikarian Capital, LLC | 0.10% | No change | 265,769 | $308K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | New | 250,848 | $291K |
| Renaissance Technologies | 0.00% | Reduce -3.9% | 246,588 | $286K |
| Two Sigma Investments, LP | 0.00% | Reduce -13.6% | 200,785 | $233K |
| Jane Street Group, LLC | 0.00% | Add +1526.0% | 175,670 | $204K |
| Morgan Stanley | 0.00% | Add +0.7% | 153,748 | $178K |
| Susquehanna International Group, LLP | 0.00% | Add +37.3% | 152,338 | $177K |
| Bank of America Corp. | 0.00% | Reduce -7.5% | 147,009 | $171K |
| Marshall Wace, LLP | 0.00% | New | 137,943 | $160K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 115,171 | $134K |
| State Street Corp. | 0.00% | Reduce -79.5% | 106,678 | $124K |
| UBS Group AG | 0.00% | Reduce -23.2% | 94,422 | $110K |
| Catalyst Financial Partners LLC | 0.01% | No change | 89,699 | $104K |
| Northern Trust Corp. | 0.00% | Reduce -77.5% | 65,162 | $76K |
| Qube Research & Technologies Ltd | 0.00% | Add +160.0% | 57,559 | $67K |
| Boothbay Fund Management, LLC | 0.00% | No change | 51,042 | $59K |
| AQR Capital Management | 0.00% | Add +10.9% | 46,292 | $54K |
| Dimensional Fund Advisors LP | 0.00% | No change | 43,524 | $50K |
| Jain Global LLC | 0.00% | New | 39,990 | $46K |
| Marex Group Ltd | 0.00% | No change | 33,300 | $39K |
| Gsa Capital Partners LLP | 0.00% | New | 32,103 | $37K |
| HRT Financial LP | 0.00% | New | 31,427 | $36K |
| Intrepid Financial Planning Group LLC | 0.01% | No change | 30,150 | $35K |
| Barclays PLC | 0.00% | Reduce -58.5% | 29,991 | $35K |
| JPMorgan Chase & Co. | 0.00% | Reduce -98.0% | 16,675 | $29K |
| Point72 Asia (Singapore) Pte. Ltd. | 0.00% | New | 21,340 | $25K |
| Two Sigma Securities, LLC | 0.00% | Add +68.9% | 20,066 | $23K |
| Catalyst Funds Management Pty Ltd | 0.01% | New | 19,700 | $23K |
| Pinnacle Wealth Management Advisory Group, LLC | 0.00% | No change | 18,020 | $21K |
| Pinnacle Associates Ltd. | 0.00% | No change | 18,020 | $21K |
| Factor Wealth Management LTD | 0.01% | No change | 16,500 | $19K |
| Schonfeld Strategic Advisors LLC | 0.00% | New | 15,929 | $18K |
| Savant Capital, LLC | 0.00% | New | 11,045 | $13K |
| DRW Securities, LLC | 0.00% | New | 11,018 | $13K |
| Ethic Inc. | 0.00% | New | 11,377 | $13K |
| Integrated Wealth Concepts LLC | 0.00% | Reduce -31.5% | 10,426 | $12K |
| Group One Trading LLC | 0.00% | Add +253.6% | 8,524 | $10K |
| Osaic Holdings, Inc. | 0.00% | Add +45.0% | 7,251 | $8K |
| Wells Fargo & Company | 0.00% | Reduce -75.3% | 6,825 | $8K |
| PNC Financial Services Group, Inc. | 0.00% | Add +11.3% | 4,948 | $6K |
| Cwm, LLC | 0.00% | Reduce -0.0% | 4,136 | $5K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -57.0% | 3,631 | $4K |
| Citigroup Inc. | 0.00% | Reduce -89.6% | 3,115 | $4K |
| BNP Paribas Financial Markets | 0.00% | Reduce -35.8% | 2,034 | $2K |
| Federation des caisses Desjardins du Quebec | 0.00% | No change | 1,500 | $2K |
| Nisa Investment Advisors, LLC | 0.00% | New | 1,229 | $1K |
| Royal Bank of Canada | 0.00% | Reduce -88.7% | 969 | $1K |
| Brooklyn Investment Group | 0.00% | New | 619 | $719 |
| SBI Securities Co., Ltd. | 0.00% | No change | 513 | $595 |
| Raymond James Financial Inc. | 0.00% | New | 495 | $574 |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -14.6% | 415 | $481 |
| NBT Bank, N.A. | 0.00% | New | 200 | $232 |
| Farther Finance Advisors, LLC | 0.00% | New | 200 | $232 |
| Clearstead Advisors, LLC | 0.00% | New | 63 | $74 |
| True Wealth Design, LLC | 0.00% | Add +20.7% | 35 | $41 |
"% of holder's portfolio" is ABOS's weight in each manager's 13F, not the share of Acumen Pharmaceuticals Inc. the manager owns.