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, Q4 2025
Institutional positions in Acumen Pharmaceuticals, Inc. as of Dec 31, 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
- 71
- +4 vs. Q3 2025
- Shares held
- 35.7M
- −32.9K (−0.1%) vs. Q3 2025
- Total value
- $75.2M
- +$14.2M (+23.3%) vs. Q3 2025
- New holders
- 12
- 13 more added
- Sold out
- 8
- 22 more reduced
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Acumen Pharmaceuticals, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 14,932,063 | $31.5M | 0.32% | 00.0% | Unchanged |
| Sands Capital Ventures, LLC | 3,417,075 | $7.21M | 1.39% | 00.0% | Unchanged |
| Franklin Resources Inc | 2,305,096 | $4.86M | 0.00% | 00.0% | Unchanged |
| FMR LLC | 2,027,497 | $4.28M | 0.00% | −1,828−0.1% | Reduced |
| Vanguard Group Inc | 1,653,772 | $3.49M | 0.00% | +2,300+0.1% | Added |
| Knollwood Investment Advisory, LLC | 1,628,510 | $3.44M | 0.32% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 939,603 | $1.98M | 0.01% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 891,183 | $1.88M | 0.14% | 00.0% | Unchanged |
| Laurion Capital Management LP | 867,046 | $1.83M | 0.12% | 00.0% | Unchanged |
| Pathstone Holdings, LLC | 859,110 | $1.81M | 0.01% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 725,000 | $1.53M | 0.01% | −40.0% | Reduced |
| Millennium Management LLC | 584,143 | $1.23M | 0.00% | −17,573−2.9% | Reduced |
| Renaissance Technologies LLC | 423,100 | $892.7K | 0.00% | −161,192−27.6% | Reduced |
| Two Sigma Advisers, LP | 421,800 | $890.0K | 0.00% | −1,800−0.4% | Reduced |
| Geode Capital Management, LLC | 410,206 | $865.7K | 0.00% | +11,428+2.9% | Added |
| SG Americas Securities, LLC | 401,047 | $846.0K | 0.00% | −2,831−0.7% | Reduced |
| Susquehanna International Group, LLP | 373,198 | $787.4K | 0.00% | +158,758+74.0% | Added |
| Citadel Advisors LLC | 345,283 | $728.5K | 0.00% | −148,825−30.1% | Reduced |
| Ikarian Capital, LLC | 254,312 | $536.6K | 0.07% | −11,457−4.3% | Reduced |
| Bank of America Corp | 240,152 | $506.7K | 0.00% | +26,423+12.4% | Added |
| Bridgeway Capital Management, LLC | 170,171 | $359.1K | 0.01% | −20,000−10.5% | Reduced |
| BlackRock, Inc. | 169,505 | $357.7K | 0.00% | −5,185−3.0% | Reduced |
| Morgan Stanley | 166,905 | $352.2K | 0.00% | +17,504+11.7% | Added |
| Acadian Asset Management LLC | 152,780 | $320.0K | 0.00% | +74,860+96.1% | Added |
| Two Sigma Investments, LP | 143,221 | $302.2K | 0.00% | −56,225−28.2% | Reduced |
| Jane Street Group, LLC | 142,123 | $299.9K | 0.00% | −65,116−31.4% | Reduced |
| Goldman Sachs Group Inc | 117,851 | $248.7K | 0.00% | −29,297−19.9% | Reduced |
| State Street Corp | 100,178 | $211.4K | 0.00% | −6,500−6.1% | Reduced |
| Catalyst Financial Partners LLC | 89,699 | $189.3K | 0.02% | 00.0% | Unchanged |
| Northern Trust Corp | 75,212 | $158.7K | 0.00% | +10,258+15.8% | Added |
| Prospera Financial Services Inc | 50,000 | $105.5K | 0.00% | +50,000 | New |
| XTX Topco Ltd | 49,563 | $104.6K | 0.00% | +49,563 | New |
| Dimensional Fund Advisors LP | 49,062 | $103.5K | 0.00% | +5,538+12.7% | Added |
| Quadrature Capital Ltd | 49,046 | $103.5K | 0.00% | +49,046 | New |
| Qube Research & Technologies Ltd | 47,985 | $101.2K | 0.00% | +15,104+45.9% | Added |
| Boothbay Fund Management, LLC | 39,585 | $83.5K | 0.00% | −11,457−22.4% | Reduced |
| Point72 Asset Management, L.P. | 36,365 | $76.7K | 0.00% | +36,365 | New |
| Intrepid Financial Planning Group LLC | 30,150 | $63.6K | 0.02% | 00.0% | Unchanged |
| Barclays PLC | 29,991 | $63.3K | 0.00% | 00.0% | Unchanged |
| Catalyst Funds Management Pty Ltd | 29,600 | $62.5K | 0.01% | 00.0% | Unchanged |
| Omers Administration Corp | 22,454 | $47.4K | 0.00% | +22,454 | New |
| UBS Group AG | 21,562 | $45.5K | 0.00% | −9,279−30.1% | Reduced |
| Marshall Wace, LLP | 20,907 | $44.1K | 0.00% | +20,907 | New |
| PFG Investments, LLC | 19,000 | $40.1K | 0.00% | +7,500+65.2% | Added |
| Independent Advisor Alliance | 19,000 | $40.1K | 0.00% | +19,000 | New |
| Pinnacle Associates Ltd | 18,020 | $38.0K | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Management Advisory Group, LLC | 18,020 | $38.0K | 0.00% | 00.0% | Unchanged |
| Clune & Associates, Ltd. | 16,500 | $34.8K | 0.01% | 00.0% | Unchanged |
| Virtu Financial LLC | 10,922 | $23.0K | 0.00% | +10,922 | New |
| Nine Masts Capital Ltd | 10,637 | $22.4K | 0.00% | +10,637 | New |
| Wells Fargo & Company | 7,100 | $15.0K | 0.00% | +600+9.2% | Added |
| Advisor Group Holdings, Inc. | 6,851 | $14.5K | 0.00% | −400−5.5% | Reduced |
| Group One Trading, L.P. | 4,752 | $10.0K | 0.00% | −3,046−39.1% | Reduced |
| Tower Research Capital LLC (TRC) | 4,457 | $9.40K | 0.00% | +4,457 | New |
| Larson Financial Group LLC | 4,348 | $9.17K | 0.00% | +348+8.7% | Added |
| The PNC Financial Services Group, Inc. | 3,080 | $6.50K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 3,000 | $6.33K | 0.00% | 00.0% | Unchanged |
| TFC Financial Management | 2,500 | $5.28K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 2,282 | $5.00K | 0.00% | +1,162+103.8% | Added |
| JPMorgan Chase & Co | 2,409 | $4.22K | 0.00% | −623−20.5% | Reduced |
| Nisa Investment Advisors, LLC | 1,229 | $2.59K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 1,224 | $2.58K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 407 | $859 | 0.00% | 00.0% | Unchanged |
| Flagship Harbor Advisors, LLC | 350 | $739 | 0.00% | +350 | New |
| SBI Securities Co., Ltd. | 323 | $682 | 0.00% | −195−37.6% | Reduced |
| NBT Bank N A | 2 | $422 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 200 | $422 | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 60 | $127 | 0.00% | +60 | New |
| SRS Capital Advisors, Inc. | 26 | $55 | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 5 | $11 | 0.00% | −1−16.7% | Reduced |
| CWM, LLC | 147 | $0 | 0.00% | −597−80.2% | Reduced |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −32,103−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −16,001−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −14,014−100.0% | Sold out |
| Savant Capital, LLC | 0 | $0 | 0.00% | −11,045−100.0% | Sold out |
| Integrated Wealth Concepts LLC | 0 | $0 | 0.00% | −10,179−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −1,111−100.0% | Sold out |
| Bell Investment Advisors, Inc | 0 | $0 | 0.00% | −362−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −151−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | – | – | – | – | Not filed |
| Point72 Asia (Singapore) Pte. Ltd. | – | – | – | – | Not filed |