Acumen Pharmaceuticals Inc (ABOS)
Healthcare
Biotechnology
2.20 $
-0.9%
vs. previous close
Closing price · As of: 31. Jul 2026
Who owns Acumen Pharmaceuticals Inc (ABOS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 51.2% of the shares are freely tradable; institutional investors hold 64.2%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
64.2%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
6.8%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
51.2%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
3.8%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
72Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| RA Capital Management, LLC | 29.06 | 20,992,669 | +40.6 | 03/31/2026 |
| Sands Capital Ventures, LLC | 5.15 | 3,720,105 | +8.9 | 03/31/2026 |
| Alyeska Investment Group, L.P. | 3.40 | 2,454,754 | +161.3 | 03/31/2026 |
| Franklin Resources Inc | 3.19 | 2,305,096 | +0.0 | 03/31/2026 |
| ADAR1 Capital Management LLC | 2.99 | 2,156,334 | +142.0 | 03/31/2026 |
| Vanguard Group Inc | 2.29 | 1,653,772 | +0.1 | 12/31/2025 |
| Knollwood Investment Advisory LLC | 2.25 | 1,628,510 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.09 | 1,506,277 | +0.0 | 03/31/2026 |
| FMR Inc | 1.60 | 1,157,346 | -42.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Franklin Biotechnology Discv A(acc)USD | 2.05 | 1,478,586 | -20.6 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.