Posner Brian S
SEC CIK 1372455 · EDGAR
BoughtSold
Most active insiders at DYN, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Rhodes Jason P | Dir | — | $129.10M |
| 2 | Kersten Dirk | Dir | — | $38.57M |
| 3 | Cox John | CEO, Pres, Dir | — | $443.7K |
| 4 | Posner Brian S | Dir | $274.8K | — |
| 5 | Kerr Douglas | Chief Medical Off | — | $233.1K |
| 6 | Lucera Erick | CFO | — | $228.7K |
| 7 | Friedl-Naderer Johanna | Chief Commercial Off | — | $43.4K |
| 8 | Lubner David Charles | Dir | — | — |
Transactions 20
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-06-09 17:06 | 2026-06-08 | DYN | Dyne Therapeutics, Inc. | Posner Brian S | Dir | P - Purchase | $16.94 | +2,000 | 24.5K | +9% | +$33.9K |
| 2026-06-05 16:10 | 2026-06-03 | DYN | Dyne Therapeutics, Inc. | Posner Brian S | Dir | P - Purchase | $17.48 | +2,500 | 22.5K | +12% | +$43.7K | |
| 2026-06-04 18:23 | 2026-06-03 | ACGL | Arch Capital Group | Posner Brian S | Dir | S - Sale | $19.66 | -3,000 | 0 | -100% | -$59.0K | |
| 2026-05-28 16:11 | 2026-05-26 | DYN | Dyne Therapeutics, Inc. | Posner Brian S | Dir | P - Purchase | $18.21 | +2,000 | 20.0K | +11% | +$36.4K | |
| 2026-05-22 16:10 | 2026-05-20 | DYN | Dyne Therapeutics, Inc. | Posner Brian S | Dir | P - Purchase | $17.12 | +2,500 | 18.0K | +16% | +$42.8K | |
| 2026-05-12 16:32 | 2026-05-11 | ACGL | Arch Capital Group | Posner Brian S | Dir | S - Sale | $17.14 | -2,000 | 0 | -100% | -$34.3K | |
| 2026-05-07 16:50 | 2026-05-05 | ACGL | Arch Capital Group | Posner Brian S | Dir | A - Grant | — | +2,071 | 122.2K | +2% | — | |
| 2026-04-01 16:27 | 2026-03-30 | DYN | Dyne Therapeutics, Inc. | Posner Brian S | Dir | P - Purchase | $17.08 | +2,000 | 15.5K | +15% | +$34.2K | |
| 2026-03-13 | 2026-03-11 | DYN | Dyne Therapeutics, Inc. | Posner Brian S | Dir | P - Purchase | $19.35 | +2,000 | 13.5K | +17% | +$38.7K | |
| 2026-03-12 | 2026-03-11 | ACGL | Arch Capital Group | Posner Brian S | Dir | S - Sale | $17.12 | -3,000 | 2,000 | -60% | -$51.4K | |
| 2026-03-10 | 2026-03-06 | DYN | Dyne Therapeutics, Inc. | Posner Brian S | Dir | P - Purchase | $15.06 | +3,000 | 11.5K | +35% | +$45.2K | |
| 2025-08-04 | 2025-08-01 | ACGL | Arch Capital Group | Posner Brian S | Dir | P - Purchase | $17.34 | +1,000 | 5,000 | +25% | +$17.3K | |
| 2025-05-09 | 2025-05-07 | ACGL | Arch Capital Group | Posner Brian S | Dir | A - Grant | — | +1,564 | 120.1K | +1% | — | |
| 2024-05-13 | 2024-05-09 | ACGL | Arch Capital Group | Posner Brian S | Dir | A - Grant | — | +1,455 | 118.5K | +1% | — | |
| 2023-05-08 | 2023-05-04 | ACGL | Arch Capital Group | Posner Brian S | Dir | A - Grant | — | +1,714 | 117.1K | +1% | — | |
| 2022-11-01 | 2022-10-28 | ACGL | Arch Capital Group | Posner Brian S | Dir | P - Purchase | $17.60 | +2,000 | 4,000 | +100% | +$35.2K | |
| M | 2022-05-06 | 2022-05-04 | ACGL | Arch Capital Group | Posner Brian S | Dir | A - Grant | — | +5,284 | 115.4K | +5% | — |
| 2022-05-02 | 2022-04-29 | ACGL | Arch Capital Group | Posner Brian S | Dir | P - Purchase | $19.23 | +2,000 | 2,000 | New | +$38.5K | |
| 2021-10-01 | 2021-09-30 | ACGL | Arch Capital Group | Posner Brian S | Dir | D - Sale to Iss | $25.00 | -2,000 | 0 | -100% | -$50.0K | |
| 2021-07-02 | 2021-07-01 | BIIB | Biogen | Posner Brian S | Dir | A - Grant | $0.00 | +775 | 8,175 | +10% | $0 |
Purchase Sale Sale after option exercise All abbreviations