Acumen Pharmaceuticals, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| RA Capital Healthcare Fund LP | — | Award / Grant | 12,800 | — | — | 12,800 | Jun 4, 2025 |
| Stoppel Laura | — | Award / Grant | 12,800 | — | — | 12,800 | Jun 4, 2025 |
| Stalfort John A III | — | Award / Grant | 12,800 | — | — | 185,124 | Jun 4, 2025 |
| Drapkin Kimberlee C | — | Award / Grant | 12,800 | — | — | 12,800 | Jun 4, 2025 |
| Fountain Nathan B | — | Award / Grant | 12,800 | — | — | 19,050 | Jun 4, 2025 |
| Ives Jeffrey L. | — | Award / Grant | 12,800 | — | — | 12,800 | Jun 4, 2025 |
| Porter Derrell | — | Award / Grant | 12,800 | — | — | 12,800 | Jun 4, 2025 |
| Zuga Matt | CFO & Chief Business Officer | Sale | 28,902 | $1.72 | $49,711 | 231,744 | Jan 21, 2025 |
| OConnell Daniel Joseph | Chief Executive Officer | Sale | 12,619 | $1.59 | $20,064 | 667,488 | Jan 21, 2025 |
| Meisner Derek M | Chief Legal Officer & Corp Sec | Sale | 3,418 | $1.59 | $5,435 | 161,127 | Jan 21, 2025 |
| Barton Russell | Chief Operating Officer | Sale | 2,914 | $1.61 | $4,692 | 136,117 | Jan 21, 2025 |
| Siemers Eric | Chief Medical Officer | Sale | 3,219 | $1.59 | $5,118 | 170,298 | Jan 21, 2025 |
| OConnell Daniel Joseph | Chief Executive Officer | Sale | 47,778 | $1.84 | $87,912 | 454,707 | Jan 7, 2025 |
| Schacterle Amy | Chief Regulatory Officer | Award / Grant | 8,800 | — | — | 8,800 | Jan 6, 2025 |
| Doherty James J. | President and CDO | Award / Grant | 62,600 | — | — | 62,600 | Jan 6, 2025 |
| Meisner Derek M | Chief Legal Officer & Corp Sec | Sale | 11,122 | $1.84 | $20,464 | 97,745 | Jan 6, 2025 |
| Barton Russell | Chief Operating Officer | Sale | 7,636 | $1.86 | $14,203 | 89,231 | Jan 6, 2025 |
| Zuga Matt | CFO & Chief Business Officer | Award / Grant | 66,800 | — | — | 265,010 | Jan 3, 2025 |
| Siemers Eric | Chief Medical Officer | Award / Grant | 66,800 | — | — | 173,517 | Jan 3, 2025 |
| OConnell Daniel Joseph | President and CEO | Sale | 15,200 | $3.47 | $52,744 | 502,485 | Jan 19, 2024 |
| Meisner Derek M | Chief Legal Officer & Corp Sec | Sale | 8,933 | $3.48 | $31,087 | 108,867 | Jan 19, 2024 |
| Zuga Matt | CFO & Chief Business Officer | Sale | 4,242 | $3.71 | $15,738 | 211,445 | Jan 18, 2024 |
| Siemers Eric | Chief Medical Officer | Sale | 3,124 | $3.71 | $11,590 | 117,576 | Jan 18, 2024 |
| Barton Russell | Chief Operating Officer | Sale | 2,833 | $3.73 | $10,567 | 96,867 | Jan 18, 2024 |
| Barton Russell | Chief Operating Officer | Award / Grant | 73,000 | — | — | 99,700 | Jan 2, 2024 |
| Meisner Derek M | Chief Legal Officer & Corp Sec | Award / Grant | 91,000 | — | — | 117,800 | Jan 2, 2024 |
| Siemers Eric | Chief Medical Officer | Award / Grant | 94,000 | — | — | 120,700 | Jan 2, 2024 |
| Zuga Matt | CFO & Chief Business Officer | Award / Grant | 106,000 | — | — | 215,687 | Jan 2, 2024 |
| OConnell Daniel Joseph | President and CEO | Award / Grant | 401,000 | — | — | 517,685 | Jan 2, 2024 |
| Ives Jeffrey L. | — | Option Exercise | 2,800 | $1.19 | $3,332 | 2,800 | Aug 17, 2023 |
| RA CAPITAL MANAGEMENT, L.P. | — | Purchase | 5,161,290 | $7.75 | $39,999,998 | 13,043,179 | Jul 21, 2023 |
| Zuga Matt | CFO and Chief Business Officer | Award / Grant | 33,500 | — | — | 109,687 | Jan 17, 2023 |
| Siemers Eric | Chief Medical Officer | Award / Grant | 26,700 | — | — | 26,700 | Jan 17, 2023 |
| OConnell Daniel Joseph | President and CEO | Award / Grant | 114,000 | — | — | 116,685 | Jan 17, 2023 |
| Meisner Derek M | Chief Legal Office & Corp Sec | Award / Grant | 26,800 | — | — | 26,800 | Jan 17, 2023 |
| Barton Russell | Chief Operating Officer | Award / Grant | 26,700 | — | — | 26,700 | Jan 17, 2023 |
| Zuga Matt | CFO and Chief Business Officer | Option Exercise | 50,000 | $1.19 | $59,500 | 76,187 | Dec 29, 2022 |
| OConnell Daniel Joseph | President and CEO | Option Exercise | 1,118 | $4.47 | $4,997 | 2,685 | Nov 30, 2021 |
| Shah Rajeev M. | — | C | 588,850 | — | — | 588,850 | Jul 6, 2021 |
| SANDS FRANK M. | — | Purchase | 450,000 | $14.88 | $6,696,000 | 3,417,075 | Jul 6, 2021 |
| Fountain Nathan B | — | Purchase | 6,250 | $16.00 | $100,000 | 6,250 | Jul 6, 2021 |
| Hardie Robert D. | — | C | 2,076,326 | — | — | 3,201,156 | Jul 6, 2021 |
| Hardie Robert D. | — | C | 657,985 | — | — | 657,985 | Jul 6, 2021 |
| OConnell Daniel Joseph | President and CEO | Tax Withholding | 10 | $16.00 | $160 | 1,567 | Jul 6, 2021 |
| Stalfort John A III | — | Purchase | 35,000 | $16.00 | $560,000 | 172,324 | Jul 6, 2021 |
| Zuga Matt | Chief Financial Officer | C | 26,187 | — | — | 26,187 | Jul 6, 2021 |
| Manning Paul B | — | Purchase | 312,500 | $16.00 | $5,000,000 | 3,352,693 | Jul 6, 2021 |