| Date | Name | Title | Action | No Shares | Price Per Share |
|---|---|---|---|---|---|
Insider Transactions For BIIB | |||||
| 2025-07-08 | Izzar, Rachid | Head of Global Product Strat. | Sold | 2223 | $135.00 |
| 2025-06-17 | Pangalos, Menelas N | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Freire, Maria C | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Rowinsky, Eric K | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Sherwin, Stephen A | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Langer, Susan | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Dorsa, Caroline | Director | Purchased | 3160 | $0.00 |
| 2025-06-17 | Patolawala, Monish D | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Mantas, Jesus B | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Minor, Lloyd | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Hawkins, William A | Director | Purchased | 2370 | $0.00 |
| 2025-05-19 | Singhal, Priya | Head of Development | Sold | 3806 | $126.25 |
| 2025-05-02 | Dorsa, Caroline | Director | Purchased | 1235 | $122.72 |
| 2025-05-01 | Keeney, Adam | Head of Corporate Development | Sold | 454 | $120.93 |
| 2025-05-01 | Keeney, Adam | Head of Corporate Development | Sold | 938 | $0.00 |
| 2025-05-01 | Keeney, Adam | Head of Corporate Development | Purchased | 938 | $0.00 |
| 2025-04-01 | Godbout, Sean | Chief Accounting Officer | Purchased | 545 | $0.00 |
| 2025-03-07 | Sherwin, Stephen A | Director | Sold | 8760 | $150.02 |
| 2025-02-10 | Gregory, Ginger | EVP, Human Resources | Sold | 634 | $142.54 |
| 2025-02-10 | Gregory, Ginger | EVP, Human Resources | Sold | 2159 | $0.00 |
