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, Q2 2026
Institutional positions in Acumen Pharmaceuticals, Inc. as of Jun 30, 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
- 96
- +13 vs. Q1 2026
- Shares held
- 47.9M
- +1.86M (+4.0%) vs. Q1 2026
- Total value
- $127.8M
- +$19.2M (+17.7%) vs. Q1 2026
- New holders
- 30
- 21 more added
- Sold out
- 17
- 15 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Acumen Pharmaceuticals, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Catalyst Funds Management Pty Ltd | 0 | $0 | 0.00% | −45,600−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −28,600−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −17,414−100.0% | Sold out |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −15,757−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −15,385−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −13,162−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −13,011−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −11,300−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −1,111−100.0% | Sold out |
| NBT Bank N A | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −60−100.0% | Sold out |
| Larson Financial Group LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| CWM, LLC | – | – | – | – | Not filed |