Institutional Ownership
Acumen Pharmaceuticals Inc
CUSIP 00509G209COMABOSQ1 2026
13D / 13G Filings
19
Schedule 13D/13G on record
Beneficial Filers
12
Distinct reporting persons
Largest Stake
25.9%
Max % of class reported
Institutional Holders
81
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
19 filings · latest Nov 4, 2025
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Nov 4, 2025 | Franklin Resources, Inc. | 13G/A | 3.8% | 2.31M | SEC |
| 2 | Aug 13, 2025 | Sands Capital Alternatives, LLC | 13G/A | 5.6% | 3.42M | SEC |
| 3 | Mar 31, 2025 | Ra Capital Management, L.P. | 13D/A | 24.8% | — | SEC |
| 4 | Feb 14, 2024 | Deep Track Capital, LP | 13G/A | — | — | SEC |
| 5 | Feb 6, 2024 | Franklin Resources Inc | 13G | 5.8% | 3.36M | SEC |
| 6 | Jan 24, 2024 | Murray James B Jr | 13G/A | 4.6% | 2.68M | SEC |
| 7 | Jul 25, 2023 | Ra Capital Management, L.P. | 13D/A | 25.9% | 14.98M | SEC |
| 8 | Feb 14, 2023 | Manning Paul B | 13G/A | 7.8% | 3.21M | SEC |
| 9 | Feb 14, 2023 | Sands Capital Ventures, LLC | 13G/A | 2.7% | 1.12M | SEC |
| 10 | Feb 14, 2023 | Deep Track Capital, LP | 13G/A | 9.7% | 3.95M | SEC |
9 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Acumen Pharmaceuticals Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Ra Capital Management, L.P. | 20.99M | $49.54M |
| 2 | Sands Capital Alternatives, LLC | 3.72M | $8.78M |
| 3 | Alyeska Investment Group, L.P. | 2.45M | $5.78M |
| 4 | Franklin Resources Inc | 2.31M | $5.44M |
| 5 | Adar1 Capital Management, LLC | 2.16M | $5.09M |
| 6 | Knollwood Investment Advisory, LLC | 1.63M | $3.84M |
| 7 | Fmr LLC | 1.16M | $2.73M |
| 8 | Ikarian Capital, LLC | 1.05M | $2.49M |
| 9 | Hudson Bay Capital Management LP | 968.9K | $2.29M |
| 10 | Pathstone Holdings, LLC | 859.1K | $2.03M |