People/Brian S. Posner
BS
PersonUS
Brian S. Posner
3 companies·19 mandates (6 current)·SEC CIK 0001372455
| Company | Relation | Title | Since | As of |
|---|---|---|---|---|
| ARCH CAPITAL GROUP LTD.ACGL | Officer● | Director or executive officer | — | 2026-05-05 |
| ARCH CAPITAL GROUP LTD.ACGL | Major shareholder● | — | — | 2026-05-05 |
| DYNE THERAPEUTICS, INC.DYN | Officer● | Director or executive officer | 2025-10-01 | 2026-04-22 |
| DYNE THERAPEUTICS, INC.DYN | Major shareholder● | — | — | 2026-04-22 |
| DYNE THERAPEUTICS, INC.DYN | Officer● | Director or executive officer | 2025-10-01 | 2026-04-22 |
| DYNE THERAPEUTICS, INC.DYN | Major shareholder● | — | — | 2026-04-22 |
| ARCH CAPITAL GROUP LTD.ACGL | Officer | Director or executive officer | — | — |
| ARCH CAPITAL GROUP LTD.ACGL | Major shareholder | — | — | — |
| ARCH CAPITAL GROUP LTD.ACGL | Officer | Director or executive officer | — | 2025-05-07 |
| ARCH CAPITAL GROUP LTD.ACGL | Officer | Director or executive officer | — | 2025-05-07 |
| ARCH CAPITAL GROUP LTD.ACGL | Major shareholder | — | — | 2025-05-07 |
| ARCH CAPITAL GROUP LTD.ACGL | Major shareholder | — | — | 2025-05-07 |
| ARCH CAPITAL GROUP LTD.ACGL | Officer | Director or executive officer | — | 2024-10-13 |
| ARCH CAPITAL GROUP LTD.ACGL | Major shareholder | — | — | 2024-05-09 |
| ARCH CAPITAL GROUP LTD.ACGL | Officer | Director or executive officer | — | 2024-05-09 |
| BIOGEN INC.BIIB | Officer | Director or executive officer | — | 2022-06-15 |
| BIOGEN INC.BIIB | Major shareholder | — | — | 2022-06-15 |
| ARCH CAPITAL GROUP LTD.ACGL | Major shareholder | — | — | 2022-05-04 |
| ARCH CAPITAL GROUP LTD.ACGL | Officer | Director or executive officer | — | 2022-05-04 |