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 | $107.7M |
| Q2 2024 | 81 | $105.5M |
| Q1 2024 | 80 | $175.6M |
| Q4 2023 | 67 | $147.6M |
| Q3 2023 | 66 | $179.2M |
| Q2 2023 | 53 | $126.6M |
| Q1 2023 | 62 | $112.8M |
| Q4 2022 | 60 | $155.1M |
| Q3 2022 | 50 | $275.9M |
| 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 |
|---|---|---|---|---|---|
| CWM, LLC | 147 | $0 | 0.00% | −597−80.2% | Reduced |
| Optiver Holding B.V. | 5 | $11 | 0.00% | −1−16.7% | Reduced |
| SRS Capital Advisors, Inc. | 26 | $55 | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 60 | $127 | 0.00% | +60 | New |
| NBT Bank N A | 2 | $422 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 200 | $422 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 323 | $682 | 0.00% | −195−37.6% | Reduced |
| Flagship Harbor Advisors, LLC | 350 | $739 | 0.00% | +350 | New |
| EverSource Wealth Advisors, LLC | 407 | $859 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 1,224 | $2.58K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 1,229 | $2.59K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 2,409 | $4.22K | 0.00% | −623−20.5% | Reduced |
| Royal Bank of Canada | 2,282 | $5.00K | 0.00% | +1,162+103.8% | Added |
| TFC Financial Management | 2,500 | $5.28K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 3,000 | $6.33K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 3,080 | $6.50K | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 4,348 | $9.17K | 0.00% | +348+8.7% | Added |
| Tower Research Capital LLC (TRC) | 4,457 | $9.40K | 0.00% | +4,457 | New |
| Group One Trading, L.P. | 4,752 | $10.0K | 0.00% | −3,046−39.1% | Reduced |
| Advisor Group Holdings, Inc. | 6,851 | $14.5K | 0.00% | −400−5.5% | Reduced |
| Wells Fargo & Company | 7,100 | $15.0K | 0.00% | +600+9.2% | Added |
| Nine Masts Capital Ltd | 10,637 | $22.4K | 0.00% | +10,637 | New |
| Virtu Financial LLC | 10,922 | $23.0K | 0.00% | +10,922 | New |
| Clune & Associates, Ltd. | 16,500 | $34.8K | 0.01% | 00.0% | Unchanged |
| 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 |
| 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 |
| Marshall Wace, LLP | 20,907 | $44.1K | 0.00% | +20,907 | New |
| UBS Group AG | 21,562 | $45.5K | 0.00% | −9,279−30.1% | Reduced |
| Omers Administration Corp | 22,454 | $47.4K | 0.00% | +22,454 | New |
| Catalyst Funds Management Pty Ltd | 29,600 | $62.5K | 0.01% | 00.0% | Unchanged |
| Barclays PLC | 29,991 | $63.3K | 0.00% | 00.0% | Unchanged |
| Intrepid Financial Planning Group LLC | 30,150 | $63.6K | 0.02% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 36,365 | $76.7K | 0.00% | +36,365 | New |
| Boothbay Fund Management, LLC | 39,585 | $83.5K | 0.00% | −11,457−22.4% | Reduced |
| Qube Research & Technologies Ltd | 47,985 | $101.2K | 0.00% | +15,104+45.9% | Added |
| Quadrature Capital Ltd | 49,046 | $103.5K | 0.00% | +49,046 | New |
| Dimensional Fund Advisors LP | 49,062 | $103.5K | 0.00% | +5,538+12.7% | Added |
| XTX Topco Ltd | 49,563 | $104.6K | 0.00% | +49,563 | New |
| Prospera Financial Services Inc | 50,000 | $105.5K | 0.00% | +50,000 | New |
| Northern Trust Corp | 75,212 | $158.7K | 0.00% | +10,258+15.8% | Added |
| Catalyst Financial Partners LLC | 89,699 | $189.3K | 0.02% | 00.0% | Unchanged |
| State Street Corp | 100,178 | $211.4K | 0.00% | −6,500−6.1% | Reduced |
| Goldman Sachs Group Inc | 117,851 | $248.7K | 0.00% | −29,297−19.9% | Reduced |
| Jane Street Group, LLC | 142,123 | $299.9K | 0.00% | −65,116−31.4% | Reduced |
| Two Sigma Investments, LP | 143,221 | $302.2K | 0.00% | −56,225−28.2% | Reduced |
| Acadian Asset Management LLC | 152,780 | $320.0K | 0.00% | +74,860+96.1% | Added |
| Morgan Stanley | 166,905 | $352.2K | 0.00% | +17,504+11.7% | Added |
| BlackRock, Inc. | 169,505 | $357.7K | 0.00% | −5,185−3.0% | Reduced |
| Bridgeway Capital Management, LLC | 170,171 | $359.1K | 0.01% | −20,000−10.5% | Reduced |
| Bank of America Corp | 240,152 | $506.7K | 0.00% | +26,423+12.4% | Added |
| Ikarian Capital, LLC | 254,312 | $536.6K | 0.07% | −11,457−4.3% | Reduced |
| Citadel Advisors LLC | 345,283 | $728.5K | 0.00% | −148,825−30.1% | Reduced |
| Susquehanna International Group, LLP | 373,198 | $787.4K | 0.00% | +158,758+74.0% | Added |
| SG Americas Securities, LLC | 401,047 | $846.0K | 0.00% | −2,831−0.7% | Reduced |
| Geode Capital Management, LLC | 410,206 | $865.7K | 0.00% | +11,428+2.9% | Added |
| Two Sigma Advisers, LP | 421,800 | $890.0K | 0.00% | −1,800−0.4% | Reduced |
| Renaissance Technologies LLC | 423,100 | $892.7K | 0.00% | −161,192−27.6% | Reduced |
| Millennium Management LLC | 584,143 | $1.23M | 0.00% | −17,573−2.9% | Reduced |
| Hudson Bay Capital Management LP | 725,000 | $1.53M | 0.01% | −40.0% | Reduced |
| Pathstone Holdings, LLC | 859,110 | $1.81M | 0.01% | 00.0% | Unchanged |
| Laurion Capital Management LP | 867,046 | $1.83M | 0.12% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 891,183 | $1.88M | 0.14% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 939,603 | $1.98M | 0.01% | 00.0% | Unchanged |
| Knollwood Investment Advisory, LLC | 1,628,510 | $3.44M | 0.32% | 00.0% | Unchanged |
| Vanguard Group Inc | 1,653,772 | $3.49M | 0.00% | +2,300+0.1% | Added |
| FMR LLC | 2,027,497 | $4.28M | 0.00% | −1,828−0.1% | Reduced |
| Franklin Resources Inc | 2,305,096 | $4.86M | 0.00% | 00.0% | Unchanged |
| Sands Capital Ventures, LLC | 3,417,075 | $7.21M | 1.39% | 00.0% | Unchanged |
| Ra Capital Management, L.P. | 14,932,063 | $31.5M | 0.32% | 00.0% | Unchanged |
| 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 |