| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Izzar Rachid | Head of Global Product Strat. | 225 BINNEY STREET, CAMBRIDGE | /s/ Wendell Taylor, attorney-in-fact for Rachid Izzar | 17 Feb 2026 | 0001875506 |
| 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 | +7,390 | $0.000000 | 7,390 | 13 Feb 2026 | Common Stock | 7,390 | $0.000000 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 13, 2026. |