Companies / Acumen Pharmaceuticals, Inc. / Activity
Activity — Acumen Pharmaceuticals, Inc.
71 moves.
Top impactInsider · CEO movesInsider · biggest buysInsider · biggest sellsInstitution · biggest movesInstitution · new positions
| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Jan 7, 2026 | Meisner Derek M Executive | Sell | Common Stock | $20.0K | -10K -6.97% | 134,459 0.19% of shares | low |
| Jan 9, 2026 | OConnell Daniel Joseph CEO | Sell | Common Stock | $22.8K | -13K -2.12% | 598,898 0.83% of shares | low |
| Jan 26, 2026 | Meisner Derek M Executive | Exercise | Common Stock | $27.9K | +15K +8.67% | 189,084 0.26% of shares | low |
| Feb 27, 2026 | Meisner Derek M Executive | Sell | Common Stock | $28.3K | -9K -5.13% | 173,999 0.24% of shares | low |
| Jan 26, 2026 | Meisner Derek M Executive | Sell | Common Stock | $45.3K | -15K -7.98% | 173,999 0.24% of shares | low |
| Jan 8, 2026 | Meisner Derek M Executive | Sell | Common Stock | $54.9K | -30K -23.58% | 97,548 0.13% of shares | low |
| Jan 7, 2026 | OConnell Daniel Joseph CEO | Sell | Common Stock | $75.0K | -38K -5.74% | 619,982 0.86% of shares | low |
| Mar 16, 2026 | RA Capital Management, L.P. Director | Grant | Common Stock | $20.00M | +6.1M +46.47% | 19,103,785 26.42% of shares | low |
| Jun 3, 2026 | Drapkin Kimberlee C Director | Grant | Stock Option (right to buy) | — | +53K | 53,250 0.07% of shares | low |
| Jun 3, 2026 | RA Capital Management, L.P. Director | Grant | Stock Option (Right to Buy) | — | +53K | 53,250 0.07% of shares | low |
| Jan 16, 2026 | Zuga Matt Executive | Grant | Employee Stock Option (right to buy) | — | +149K | 148,700 0.21% of shares | low |
| Mar 6, 2026 | Meisner Derek M Executive | Exercise | Employee Stock Option (right to buy) | — | -2K -2.86% | 71,048 0.10% of shares | low |
| Feb 27, 2026 | Meisner Derek M Executive | Exercise | Employee Stock Option (right to buy) | — | -9K -11.40% | 73,138 0.10% of shares | low |
| Jan 28, 2026 | Meisner Derek M Executive | Exercise | Employee Stock Option (right to buy) | — | -3K -3.13% | 82,544 0.11% of shares | low |
| Jan 26, 2026 | Meisner Derek M Executive | Exercise | Employee Stock Option (right to buy) | — | -15K -15.04% | 85,215 0.12% of shares | low |
| Jan 16, 2026 | Meisner Derek M Executive | Grant | Employee Stock Option (right to buy) | — | +149K | 148,700 0.21% of shares | low |
| Jan 20, 2026 | OConnell Daniel Joseph CEO | Grant | Employee Stock Option (right to buy) | — | +450K | 450,000 0.62% of shares | low |
| Jan 16, 2026 | Siemers Eric Executive | Grant | Employee Stock Option (right to buy) | — | +149K | 148,700 0.21% of shares | low |
| Jan 16, 2026 | Barton Russell Executive | Grant | Employee Stock Option (right to buy) | — | +127K | 126,900 0.18% of shares | low |
| Jan 16, 2026 | Schacterle Amy Executive | Grant | Employee Stock Option (right to buy) | — | +127K | 126,900 0.18% of shares | low |
| Jan 16, 2026 | Doherty James J. Executive | Grant | Employee Stock Option (right to buy) | — | +250K | 250,300 0.35% of shares | low |