MILLENNIUM MANAGEMENT LLC
Holdings in BIIB
Position Over Time
| Report Date | Value (USD) | Shares | Type | Discretion | Filed |
|---|---|---|---|---|---|
| 2025-12-31 | $17,792,589 | 101,100 | Shares | Sole | 2026-02-17 |
| 2025-12-31 | $8,218,733 | 46,700 | Shares | Sole | 2026-02-17 |
| 2025-12-31 | $198,091,880 | 1,125,586 | Shares | Sole | 2026-02-17 |
| 2025-09-30 | $36,560,880 | 261,000 | Shares | Sole | 2025-11-14 |
| 2025-09-30 | $155,655,495 | 1,111,190 | Shares | Sole | 2025-11-14 |
| 2025-09-30 | $11,990,848 | 85,600 | Shares | Sole | 2025-11-14 |
| 2025-06-30 | $6,806,978 | 54,200 | Shares | Sole | 2025-08-14 |
| 2025-06-30 | $84,836,296 | 675,502 | Shares | Sole | 2025-08-14 |
| 2025-06-30 | $3,114,632 | 24,800 | Shares | Sole | 2025-08-14 |
| 2025-03-31 | $10,317,736 | 75,400 | Shares | Sole | 2025-05-15 |
| 2025-03-31 | $58,019,749 | 423,997 | Shares | Sole | 2025-05-15 |
| 2025-03-31 | $7,663,040 | 56,000 | Shares | Sole | 2025-05-15 |
| 2024-12-31 | $4,388,804 | 28,700 | Shares | Sole | 2025-02-14 |
| 2024-12-31 | $83,164,624 | 543,844 | Shares | Sole | 2025-02-14 |
| 2024-12-31 | $4,174,716 | 27,300 | Shares | Sole | 2025-02-14 |
| 2024-09-30 | $77,174,682 | 398,136 | Shares | Sole | 2024-11-14 |
| 2024-09-30 | $5,737,664 | 29,600 | Shares | Sole | 2024-11-14 |
| 2024-09-30 | $8,819,720 | 45,500 | Shares | Sole | 2024-11-14 |
| 2024-06-30 | $3,315,026 | 14,300 | Shares | Sole | 2024-08-14 |
| 2024-06-30 | $19,820,610 | 85,500 | Shares | Sole | 2024-08-14 |
| 2024-06-30 | $55,601,331 | 239,847 | Shares | Sole | 2024-08-14 |
| 2024-03-31 | $8,517,385 | 39,500 | Shares | Sole | 2024-05-15 |
| 2024-03-31 | $9,617,098 | 44,600 | Shares | Sole | 2024-05-15 |
| 2024-03-31 | $38,039,719 | 176,412 | Shares | Sole | 2024-05-15 |
| 2023-12-31 | $10,221,415 | 39,500 | Shares | Sole | 2024-02-14 |
| 2023-12-31 | $1,173,521 | 4,535 | Shares | Sole | 2024-02-14 |
| 2023-12-31 | $9,781,506 | 37,800 | Shares | Sole | 2024-02-14 |
| 2023-09-30 | $18,941,637 | 73,700 | Shares | Sole | 2023-11-14 |
| 2023-09-30 | $8,764,041 | 34,100 | Shares | Sole | 2023-11-14 |
| 2023-09-30 | $20,083,789 | 78,144 | Shares | Sole | 2023-11-14 |
| 2023-06-30 | $12,582,963 | 44,174 | Shares | Sole | 2023-08-14 |
| 2023-06-30 | $18,942,525 | 66,500 | Shares | Sole | 2023-08-14 |
| 2023-06-30 | $23,072,850 | 81,000 | Shares | Sole | 2023-08-14 |
| 2023-03-31 | $14,707,787 | 52,900 | Shares | Sole | 2023-05-15 |
| 2023-03-31 | $8,507,718 | 30,600 | Shares | Sole | 2023-05-15 |
| 2023-03-31 | $142,738,377 | 513,392 | Shares | Sole | 2023-05-15 |
| 2022-12-31 | $16,698,276 | 60,300 | Shares | Sole | 2023-02-14 |
| 2022-12-31 | $48,128,696 | 173,800 | Shares | Sole | 2023-02-14 |
| 2022-12-31 | $93,760,958 | 338,585 | Shares | Sole | 2023-02-14 |
| 2022-09-30 | $33,802,200 | 126,600 | Shares | Sole | 2022-11-14 |
| 2022-09-30 | $43,841,400 | 164,200 | Shares | Sole | 2022-11-14 |
| 2022-09-30 | $243,692,235 | 912,705 | Shares | Sole | 2022-11-14 |
| 2022-06-30 | $118,621,089 | 581,647 | Shares | Sole | 2022-08-15 |
| 2022-06-30 | $32,365,278 | 158,700 | Shares | Sole | 2022-08-15 |
| 2022-03-31 | $127,247,257 | 604,213 | Shares | Sole | 2022-05-16 |
| 2022-03-31 | $37,634,220 | 178,700 | Shares | Sole | 2022-05-16 |
| 2021-12-31 | $19,337,552 | 80,600 | Shares | Sole | 2022-02-14 |
| 2021-12-31 | $68,065,304 | 283,700 | Shares | Sole | 2022-02-14 |
| 2021-12-31 | $99,060,088 | 412,888 | Shares | Sole | 2022-02-14 |
| 2021-09-30 | $80,595,552 | 284,800 | Shares | Sole | 2021-11-15 |