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| Date | Name | Title | Action | No Shares | Price Per Share |
|---|---|---|---|---|---|
Insider Transactions For BIIB | |||||
| 2025-09-02 | Singhal, Priya | Head of Development | Sold | 517 | $133.55 |
| 2025-08-29 | Singhal, Priya | Head of Development | Sold | 807 | $132.22 |
| 2025-08-29 | Singhal, Priya | Head of Development | Sold | 1669 | $0.00 |
| 2025-08-29 | Singhal, Priya | Head of Development | Purchased | 1669 | $0.00 |
| 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 | Minor, Lloyd | Director | Purchased | 2370 | $0.00 |
| 2025-06-17 | Hawkins, William A | 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 | Mantas, Jesus B | 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 | Sherwin, Stephen 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 | Purchased | 938 | $0.00 |
| 2025-05-01 | Keeney, Adam | Head of Corporate Development | Sold | 938 | $0.00 |
| 2025-05-01 | Keeney, Adam | Head of Corporate Development | Sold | 454 | $120.93 |
