Insider · CIK 0001372455
Brian S Posner
Files at: DYN, ACGL, BIIB, BIVV. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 8, 2026 PForm 4 → | Jun 9, 5:06 pm EDT | Dyne Therapeutics, Inc.DYN | 2,000 | $16.94 | $33,880 | 24,500 | +8.89% | |
| Jun 3, 2026 PForm 4 → | Jun 5, 4:10 pm EDT | Dyne Therapeutics, Inc.DYN | 2,500 | $17.48 | $43,700 | 22,500 | +12.5% | |
| Jun 3, 2026 SForm 4 → | Jun 4, 6:23 pm EDT | ARCH CAPITAL GROUP LTD.ACGL | 3,000 | $19.66 | $58,980 | 0 | −100% |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 5, 2026 AForm 4 → | Jun 9, 5:06 pm EDT | Dyne Therapeutics, Inc.DYN | 35,152 | — | — | 35,152 | — |