| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Pangalos Menelas N | Director | C/O BIOGEN INC. 225 BINNEY, CAMBRIDGE | /s/ Wendell Taylor, attorney-in-fact for Dr. Pangalos | 18 Jun 2025 | 0002001873 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BIIB | Restricted Stock Unit | Award | $0 | +2,370 | $0.000000 | 2,370 | 17 Jun 2025 | Common Stock | 2,370 | $0.000000 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 17, 2025. |