Posner Brian S
SEC-identified person · CIK 1372455 Identifier-verified
Public-company roles (from insider filings)
| Company | Capacity as filed | Filings |
|---|---|---|
| Dyne Therapeutics, Inc. DYN | Director | filed 2025 - 2026 |
| Arch Capital Group LTD. ACGL | Director | filed 2010 - 2026 |
| Biogen INC. BIIB | Director | filed 2008 - 2023 |
| Bioverativ Inc. BIVV | Director | filed 2017 - 2018 |
| BG Medicine, Inc. BGMD | Director | filed 2012 - 2014 |
| Anadys Pharmaceuticals INC ANDS | Director | filed 2011 - 2011 |
| Salomon Brothers Capital & Income Fund INC SCD | Officer of the Adviser | filed 2006 - 2006 |
All roles under one Commission-assigned identifier - the same person by the SEC's own record, not by name matching. From the SEC's insider-transaction filings (Forms 3, 4 and 5). Every reporting director and officer carries a Commission-assigned identifier (CIK), so these footprints are identifier-verified - no name matching involved. Insiders file when they transact, so dates are filing dates: "last filed" never means "served until". This layer is not yet joined to the nonprofit register - identity joins ship only after independent review.