Acumen Pharmaceuticals, Inc.
ABOS- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001576885
No open-market purchases or sales by Acumen Pharmaceuticals, Inc. insiders were filed in the last 90 days; 96 institutions reported holding it in 13F filings for Q2 2026, worth $127.8M in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Acumen Pharmaceuticals, Inc. as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 69
- −2 vs. Q2 2025
- Shares held
- 35.7M
- −1.88M (−5.0%) vs. Q2 2025
- Total value
- $61.1M
- +$17.5M (+40.0%) vs. Q2 2025
- New holders
- 13
- 9 more added
- Sold out
- 15
- 27 more reduced
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ABOS on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 96 | $127.8M |
| Q1 2026 | 84 | $108.5M |
| Q4 2025 | 71 | $75.2M |
| Q3 2025 | 69 | $61.1M |
| Q2 2025 | 71 | $43.6M |
| Q1 2025 | 81 | $44.8M |
| Q4 2024 | 80 | $73.2M |
| Q3 2024 | 73 | $107.8M |
| Q2 2024 | 81 | $105.5M |
| Q1 2024 | 80 | $176.3M |
| Q4 2023 | 67 | $147.8M |
| Q3 2023 | 66 | $181.4M |
| Q2 2023 | 53 | $126.6M |
| Q1 2023 | 62 | $114.0M |
| Q4 2022 | 60 | $158.0M |
| Q3 2022 | 50 | $278.4M |
| Q2 2022 | 47 | $120.5M |
| Q1 2022 | 57 | $106.1M |
| Q4 2021 | 52 | $172.9M |
| Q3 2021 | 41 | $357.4M |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Acumen Pharmaceuticals, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 14,932,063 | $25.5M | 0.31% | 00.0% | Unchanged |
| Sands Capital Ventures, LLC | 3,417,075 | $5.84M | 1.28% | 00.0% | Unchanged |
| Franklin Resources Inc | 2,305,096 | $3.94M | 0.00% | −771,943−25.1% | Reduced |
| FMR LLC | 2,029,325 | $3.47M | 0.00% | −4110.0% | Reduced |
| Vanguard Group Inc | 1,651,472 | $2.82M | 0.00% | −37,879−2.2% | Reduced |
| Knollwood Investment Advisory, LLC | 1,628,510 | $2.78M | 0.25% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 939,603 | $1.61M | 0.00% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 891,183 | $1.52M | 0.15% | −25,000−2.7% | Reduced |
| Laurion Capital Management LP | 867,046 | $1.48M | 0.20% | 00.0% | Unchanged |
| Pathstone Holdings, LLC | 859,110 | $1.47M | 0.01% | −199,421−18.8% | Reduced |
| Hudson Bay Capital Management LP | 725,004 | $1.24M | 0.01% | −100,000−12.1% | Reduced |
| Millennium Management LLC | 601,716 | $1.03M | 0.00% | −1,348,404−69.1% | Reduced |
| Renaissance Technologies LLC | 584,292 | $999.1K | 0.00% | +337,704+137.0% | Added |
| Citadel Advisors LLC | 494,108 | $844.9K | 0.00% | +494,108 | New |
| Two Sigma Advisers, LP | 423,600 | $724.4K | 0.00% | −2,700−0.6% | Reduced |
| SG Americas Securities, LLC | 403,878 | $691.0K | 0.00% | +403,878 | New |
| Geode Capital Management, LLC | 398,778 | $682.0K | 0.00% | +2,152+0.5% | Added |
| Ikarian Capital, LLC | 265,769 | $454.5K | 0.09% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 214,440 | $366.7K | 0.00% | +62,102+40.8% | Added |
| Bank of America Corp | 213,729 | $365.5K | 0.00% | +66,720+45.4% | Added |
| Jane Street Group, LLC | 207,239 | $354.4K | 0.00% | +31,569+18.0% | Added |
| Two Sigma Investments, LP | 199,446 | $341.1K | 0.00% | −1,339−0.7% | Reduced |
| Bridgeway Capital Management, LLC | 190,171 | $325.2K | 0.01% | +75,000+65.1% | Added |
| BlackRock, Inc. | 174,690 | $298.7K | 0.00% | −117,267−40.2% | Reduced |
| Morgan Stanley | 149,401 | $255.5K | 0.00% | −4,347−2.8% | Reduced |
| Goldman Sachs Group Inc | 147,148 | $251.6K | 0.00% | −187,535−56.0% | Reduced |
| State Street Corp | 106,678 | $182.4K | 0.00% | 00.0% | Unchanged |
| Catalyst Financial Partners LLC | 89,699 | $153.4K | 0.02% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 77,920 | $131.0K | 0.00% | +77,920 | New |
| Northern Trust Corp | 64,954 | $111.1K | 0.00% | −208−0.3% | Reduced |
| Boothbay Fund Management, LLC | 51,042 | $87.3K | 0.00% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 43,524 | $74.4K | 0.00% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 32,881 | $56.2K | 0.00% | −24,678−42.9% | Reduced |
| Gsa Capital Partners LLP | 32,103 | $55.0K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 30,841 | $52.7K | 0.00% | −63,581−67.3% | Reduced |
| Intrepid Financial Planning Group LLC | 30,150 | $51.6K | 0.02% | 00.0% | Unchanged |
| Barclays PLC | 29,991 | $51.3K | 0.00% | 00.0% | Unchanged |
| Catalyst Funds Management Pty Ltd | 29,600 | $50.6K | 0.01% | +9,900+50.3% | Added |
| Cubist Systematic Strategies, LLC | 23,904 | $40.9K | 0.00% | +23,904 | New |
| Pinnacle Associates Ltd | 18,020 | $30.8K | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Management Advisory Group, LLC | 18,020 | $30.8K | 0.00% | 00.0% | Unchanged |
| Clune & Associates, Ltd. | 16,500 | $28.2K | 0.01% | 00.0% | Unchanged |
| Point72 Asia (Singapore) Pte. Ltd. | 16,044 | $27.4K | 0.00% | −5,296−24.8% | Reduced |
| Jacobs Levy Equity Management, Inc | 16,001 | $27.4K | 0.00% | +16,001 | New |
| HRT Financial LP | 14,014 | $23.0K | 0.00% | −17,413−55.4% | Reduced |
| PFG Investments, LLC | 11,500 | $19.7K | 0.00% | +11,500 | New |
| Savant Capital, LLC | 11,045 | $18.9K | 0.00% | 00.0% | Unchanged |
| Integrated Wealth Concepts LLC | 10,179 | $17.4K | 0.00% | −247−2.4% | Reduced |
| Group One Trading, L.P. | 7,798 | $13.3K | 0.00% | −726−8.5% | Reduced |
| Wells Fargo & Company | 6,500 | $11.1K | 0.00% | −325−4.8% | Reduced |
| Advisor Group Holdings, Inc. | 7,251 | $10.4K | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 4,000 | $6.84K | 0.00% | +4,000 | New |
| JPMorgan Chase & Co | 3,032 | $5.31K | 0.00% | −13,643−81.8% | Reduced |
| The PNC Financial Services Group, Inc. | 3,080 | $5.27K | 0.00% | −1,868−37.8% | Reduced |
| Rockefeller Capital Management L.P. | 3,000 | $5.13K | 0.00% | +3,000 | New |
| TFC Financial Management | 2,500 | $4.28K | 0.00% | +2,500 | New |
| Nisa Investment Advisors, LLC | 1,229 | $2.10K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 1,224 | $2.09K | 0.00% | −810−39.8% | Reduced |
| Royal Bank of Canada | 1,120 | $2.00K | 0.00% | +151+15.6% | Added |
| Advisory Services Network, LLC | 1,111 | $1.90K | 0.00% | +1,111 | New |
| CWM, LLC | 744 | $1.00K | 0.00% | −3,392−82.0% | Reduced |
| SBI Securities Co., Ltd. | 518 | $886 | 0.00% | +5+1.0% | Added |
| EverSource Wealth Advisors, LLC | 407 | $696 | 0.00% | −8−1.9% | Reduced |
| Bell Investment Advisors, Inc | 362 | $620 | 0.00% | +362 | New |
| NBT Bank N A | 2 | $342 | 0.00% | −198−99.0% | Reduced |
| Farther Finance Advisors, LLC | 200 | $342 | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 151 | $258 | 0.00% | −2,964−95.2% | Reduced |
| SRS Capital Advisors, Inc. | 26 | $44 | 0.00% | +26 | New |
| Optiver Holding B.V. | 6 | $10 | 0.00% | +6 | New |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −250,848−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −137,943−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −46,292−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −39,990−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −33,300−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −20,066−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −15,929−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −11,018−100.0% | Sold out |
| Ethic Inc. | 0 | $0 | 0.00% | −11,377−100.0% | Sold out |
| Tower Research Capital LLC (TRC) | 0 | $0 | 0.00% | −3,631−100.0% | Sold out |
| Federation des caisses Desjardins du Quebec | 0 | $0 | 0.00% | −1,500−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −619−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −495−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −63−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −35−100.0% | Sold out |