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, Q1 2026
Institutional positions in Acumen Pharmaceuticals, Inc. as of Mar 31, 2026. 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
- 84
- +14 vs. Q4 2025
- Shares held
- 46.0M
- +12.0M (+35.3%) vs. Q4 2025
- Total value
- $108.5M
- +$36.8M (+51.3%) vs. Q4 2025
- New holders
- 21
- 31 more added
- Sold out
- 7
- 12 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Acumen Pharmaceuticals, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Optiver Holding B.V. | 5 | $12 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 20 | $47 | 0.00% | −4,328−99.5% | Reduced |
| SRS Capital Advisors, Inc. | 26 | $61 | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 60 | $142 | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 87 | $205 | 0.00% | −60−40.8% | Reduced |
| Tower Research Capital LLC (TRC) | 118 | $278 | 0.00% | −4,339−97.4% | Reduced |
| NBT Bank N A | 200 | $472 | 0.00% | +198+9,900.0% | Added |
| Farther Finance Advisors, LLC | 200 | $510 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 303 | $715 | 0.00% | −20−6.2% | Reduced |
| EverSource Wealth Advisors, LLC | 407 | $961 | 0.00% | 00.0% | Unchanged |
| US Bancorp | 1,000 | $2.36K | 0.00% | +1,000 | New |
| Advisory Services Network, LLC | 1,111 | $2.62K | 0.00% | +1,111 | New |
| BNP Paribas Arbitrage, SA | 1,208 | $2.85K | 0.00% | −16−1.3% | Reduced |
| Nisa Investment Advisors, LLC | 1,229 | $2.90K | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 1,444 | $3.16K | 0.00% | −965−40.1% | Reduced |
| Group One Trading, L.P. | 1,475 | $3.48K | 0.00% | −3,277−69.0% | Reduced |
| Jones Financial Companies LLLP | 2,000 | $4.52K | 0.00% | +2,000 | New |
| TFC Financial Management | 2,500 | $5.90K | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 3,000 | $7.08K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 3,080 | $7.27K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 4,486 | $10.6K | 0.00% | +4,486 | New |
| Advisor Group Holdings, Inc. | 5,351 | $12.6K | 0.00% | −1,500−21.9% | Reduced |
| Vanguard Global Advisers, LLC | 6,684 | $15.8K | 0.00% | +6,684 | New |
| Royal Bank of Canada | 7,090 | $17.0K | 0.00% | +4,808+210.7% | Added |
| Wells Fargo & Company | 10,108 | $23.9K | 0.00% | +3,008+42.4% | Added |
| Integrated Wealth Concepts LLC | 10,179 | $24.0K | 0.00% | +10,179 | New |
| Schonfeld Strategic Advisors LLC | 11,300 | $26.7K | 0.00% | +11,300 | New |
| Mesirow Financial Investment Management, Inc. | 11,305 | $26.7K | 0.00% | +11,305 | New |
| SEI Investments Co | 11,564 | $27.3K | 0.00% | +11,564 | New |
| Jacobs Levy Equity Management, Inc | 13,011 | $30.7K | 0.00% | +13,011 | New |
| HRT Financial LP | 13,162 | $31.0K | 0.00% | +13,162 | New |
| Squarepoint Ops LLC | 15,015 | $35.4K | 0.00% | +15,015 | New |
| Brevan Howard Capital Management LP | 15,385 | $36.3K | 0.00% | +15,385 | New |
| Captrust Financial Advisors | 15,757 | $37.2K | 0.00% | +15,757 | New |
| Clune & Associates, Ltd. | 16,500 | $38.9K | 0.01% | 00.0% | Unchanged |
| Simplex Trading, LLC | 17,414 | $41.1K | 0.00% | +17,414 | New |
| American Century Companies Inc | 17,929 | $42.3K | 0.00% | +17,929 | New |
| Pinnacle Associates Ltd | 18,020 | $42.5K | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Management Advisory Group, LLC | 18,020 | $42.5K | 0.00% | 00.0% | Unchanged |
| Independent Advisor Alliance | 19,000 | $44.8K | 0.00% | 00.0% | Unchanged |
| Axq Capital, LP | 28,487 | $67.2K | 0.01% | +28,487 | New |
| Omers Administration Corp | 28,600 | $67.5K | 0.00% | +6,146+27.4% | Added |
| Intrepid Financial Planning Group LLC | 30,150 | $71.2K | 0.03% | 00.0% | Unchanged |
| Barclays PLC | 30,679 | $72.4K | 0.00% | +688+2.3% | Added |
| Rangeley Capital, LLC | 35,000 | $82.6K | 0.09% | +35,000 | New |
| UBS Group AG | 37,146 | $87.7K | 0.00% | +15,584+72.3% | Added |
| Verdad Advisers, LP | 37,278 | $88.0K | 0.10% | +37,278 | New |
| Catalyst Funds Management Pty Ltd | 45,600 | $107.6K | 0.02% | +16,000+54.1% | Added |
| Prospera Financial Services Inc | 50,000 | $118.0K | 0.00% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 67,375 | $159.0K | 0.00% | +31,010+85.3% | Added |
| Northern Trust Corp | 75,212 | $177.5K | 0.00% | 00.0% | Unchanged |
| PFG Investments, LLC | 80,850 | $190.8K | 0.01% | +61,850+325.5% | Added |
| Jane Street Group, LLC | 89,661 | $211.6K | 0.00% | −52,462−36.9% | Reduced |
| Catalyst Financial Partners LLC | 89,699 | $211.7K | 0.02% | 00.0% | Unchanged |
| Dimensional Fund Advisors LP | 119,756 | $281.8K | 0.00% | +70,694+144.1% | Added |
| Qube Research & Technologies Ltd | 120,388 | $284.1K | 0.00% | +72,403+150.9% | Added |
| Morgan Stanley | 144,584 | $341.2K | 0.00% | −22,321−13.4% | Reduced |
| State Street Corp | 151,728 | $358.1K | 0.00% | +51,550+51.5% | Added |
| Bridgeway Capital Management, LLC | 176,171 | $415.8K | 0.01% | +6,000+3.5% | Added |
| BlackRock, Inc. | 178,326 | $420.8K | 0.00% | +8,821+5.2% | Added |
| Acadian Asset Management LLC | 185,850 | $435.0K | 0.00% | +33,070+21.6% | Added |
| Marshall Wace, LLP | 192,889 | $455.2K | 0.00% | +171,982+822.6% | Added |
| Vanguard Fiduciary Trust Co | 199,226 | $470.2K | 0.00% | +199,226 | New |
| Goldman Sachs Group Inc | 206,683 | $487.8K | 0.00% | +88,832+75.4% | Added |
| Boothbay Fund Management, LLC | 273,012 | $644.3K | 0.02% | +233,427+589.7% | Added |
| Bank of America Corp | 320,216 | $755.7K | 0.00% | +80,064+33.3% | Added |
| Geode Capital Management, LLC | 416,238 | $982.8K | 0.00% | +6,032+1.5% | Added |
| Renaissance Technologies LLC | 473,946 | $1.12M | 0.00% | +50,846+12.0% | Added |
| Laurion Capital Management LP | 525,444 | $1.24M | 0.12% | −341,602−39.4% | Reduced |
| Two Sigma Investments, LP | 530,812 | $1.25M | 0.00% | +387,591+270.6% | Added |
| Susquehanna International Group, LLP | 601,476 | $1.42M | 0.00% | +228,278+61.2% | Added |
| Millennium Management LLC | 659,675 | $1.56M | 0.00% | +75,532+12.9% | Added |
| SG Americas Securities, LLC | 719,257 | $1.70M | 0.00% | +318,210+79.3% | Added |
| Pathstone Holdings, LLC | 859,110 | $2.03M | 0.01% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 968,940 | $2.29M | 0.01% | +243,940+33.6% | Added |
| Ikarian Capital, LLC | 1,053,797 | $2.49M | 0.36% | +799,485+314.4% | Added |
| FMR LLC | 1,157,346 | $2.73M | 0.00% | −870,151−42.9% | Reduced |
| Vanguard Capital Management LLC | 1,506,277 | $3.55M | 0.00% | +1,506,277 | New |
| Knollwood Investment Advisory, LLC | 1,628,510 | $3.84M | 0.39% | 00.0% | Unchanged |
| ADAR1 Capital Management, LLC | 2,156,334 | $5.09M | 0.31% | +1,265,151+142.0% | Added |
| Franklin Resources Inc | 2,305,096 | $5.44M | 0.00% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 2,454,754 | $5.78M | 0.02% | +1,515,151+161.3% | Added |
| Sands Capital Ventures, LLC | 3,720,105 | $8.78M | 2.08% | +303,030+8.9% | Added |
| Ra Capital Management, L.P. | 20,992,669 | $49.5M | 0.52% | +6,060,606+40.6% | Added |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −421,800−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −345,283−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −49,563−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −49,046−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −10,922−100.0% | Sold out |
| Nine Masts Capital Ltd | 0 | $0 | 0.00% | −10,637−100.0% | Sold out |
| Flagship Harbor Advisors, LLC | 0 | $0 | 0.00% | −350−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |