BlackRock, Inc.
Holdings in BIIB
Position Over Time
| Report Date | Value (USD) | Shares | Type | Discretion | Filed |
|---|---|---|---|---|---|
| 2025-12-31 | $2,606,652,996 | 14,811,370 | Shares | Sole | 2026-02-12 |
| 2025-09-30 | $2,068,134,388 | 14,763,952 | Shares | Sole | 2025-11-12 |
| 2025-06-30 | $1,702,430,962 | 13,555,466 | Shares | Sole | 2025-08-12 |
| 2025-03-31 | $2,081,478,157 | 15,211,036 | Shares | Sole | 2025-05-02 |
| 2024-12-31 | $2,366,239,723 | 15,473,710 | Shares | Sole | 2025-02-07 |
| 2024-09-30 | $2,974,870,416 | 15,347,041 | Shares | Sole | 2024-11-13 |