Viehbacher Christopher (CIK 1774478) reported 8 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-02-10). Recent activity: Buy BIIB (9,008 shares), Sell BIIB (4,356 shares), Buy BIIB (15,453 shares), Sell BIIB (6,624 shares), Buy BIIB (7,040 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-10 | BIOGEN INC. (BIIB) | President and CEO | Buy | 9,008 | $0 |
| 2026-02-10 | BIOGEN INC. (BIIB) | President and CEO | Sell | 4,356 | $876,340 |
| 2026-02-10 | BIOGEN INC. (BIIB) | President and CEO | Buy | 15,453 | $0 |
| 2026-02-10 | BIOGEN INC. (BIIB) | President and CEO | Sell | 6,624 | $1.3M |
| 2025-12-03 | BIOGEN INC. (BIIB) | President and CEO | Buy | 7,040 | $0 |
| 2025-12-03 | BIOGEN INC. (BIIB) | President and CEO | Sell | 3,404 | $605,163 |
| 2025-02-10 | BIOGEN INC. (BIIB) | President and CEO | Buy | 9,008 | $0 |
| 2025-02-10 | BIOGEN INC. (BIIB) | President and CEO | Sell | 3,201 | $452,461 |
Source: SEC Form 4 filings · as of 2026-02-10