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.
Q1 2026 vs. Q4 2025
How the institutions holding Acumen Pharmaceuticals, Inc. changed between Q4 2025 and Q1 2026.
All holders in Q1 2026All holders in Q4 2025
| Measure | Q4 2025 | Of which not filed for Q1 2026 | Q1 2026 | Change |
|---|---|---|---|---|
| Holders | 71 | 1 | 84 | +14 |
| Shares | 35.7M | 1.65M | 46.0M | +12.0M (+35.3%) |
| Value | $75.2M | $3.49M | $108.5M | +$36.8M (+51.3%) |
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.
New holders (21)
Institutions that held Acumen Pharmaceuticals, Inc. at the end of Q1 2026 but not at the end of Q4 2025.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Vanguard Capital Management LLC | 1,506,277 | $3.55M | 0.00% |
| Vanguard Fiduciary Trust Co | 199,226 | $470.2K | 0.00% |
| Verdad Advisers, LP | 37,278 | $88.0K | 0.10% |
| Rangeley Capital, LLC | 35,000 | $82.6K | 0.09% |
| Axq Capital, LP | 28,487 | $67.2K | 0.01% |
| American Century Companies Inc | 17,929 | $42.3K | 0.00% |
| Simplex Trading, LLC | 17,414 | $41.1K | 0.00% |
| Captrust Financial Advisors | 15,757 | $37.2K | 0.00% |
| Brevan Howard Capital Management LP | 15,385 | $36.3K | 0.00% |
| Squarepoint Ops LLC | 15,015 | $35.4K | 0.00% |
| HRT Financial LP | 13,162 | $31.0K | 0.00% |
| Jacobs Levy Equity Management, Inc | 13,011 | $30.7K | 0.00% |
| SEI Investments Co | 11,564 | $27.3K | 0.00% |
| Mesirow Financial Investment Management, Inc. | 11,305 | $26.7K | 0.00% |
| Schonfeld Strategic Advisors LLC | 11,300 | $26.7K | 0.00% |
| Integrated Wealth Concepts LLC | 10,179 | $24.0K | 0.00% |
| Vanguard Global Advisers, LLC | 6,684 | $15.8K | 0.00% |
| Citigroup Inc | 4,486 | $10.6K | 0.00% |
| Jones Financial Companies LLLP | 2,000 | $4.52K | 0.00% |
| Advisory Services Network, LLC | 1,111 | $2.62K | 0.00% |
| US Bancorp | 1,000 | $2.36K | 0.00% |
Sold out (7)
Institutions that held Acumen Pharmaceuticals, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Two Sigma Advisers, LP | 421,800 | $890.0K |
| Citadel Advisors LLC | 345,283 | $728.5K |
| XTX Topco Ltd | 49,563 | $104.6K |
| Quadrature Capital Ltd | 49,046 | $103.5K |
| Virtu Financial LLC | 10,922 | $23.0K |
| Nine Masts Capital Ltd | 10,637 | $22.4K |
| Flagship Harbor Advisors, LLC | 350 | $739 |
Not filed for Q1 2026 yet (1)
Institutions that held Acumen Pharmaceuticals, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Vanguard Group Inc | 1,653,772 | $3.49M |