Hudson Bay Capital Management LP
Holdings in BIIB
Position Over Time
| Report Date | Value (USD) | Shares | Type | Discretion | Filed |
|---|---|---|---|---|---|
| 2025-12-31 | $39,045,141 | 221,860 | Shares | Sole | 2026-02-13 |
| 2025-06-30 | $33,625,466 | 267,740 | Shares | Sole | 2025-08-18 |
| 2025-03-31 | $27,439,156 | 200,520 | Shares | Sole | 2025-05-14 |
| 2024-12-31 | $36,854,943 | 241,008 | Shares | Sole | 2025-02-14 |
| 2024-09-30 | $58,152,000 | 300,000 | Shares | Sole | 2024-11-13 |
| 2024-06-30 | $45,204,900 | 195,000 | Shares | Sole | 2024-08-14 |
| 2024-03-31 | $48,516,750 | 225,000 | Shares | Sole | 2024-05-15 |
| 2023-12-31 | $34,933,950 | 135,000 | Shares | Sole | 2024-02-14 |
| 2023-09-30 | $21,203,325 | 82,500 | Shares | Sole | 2023-11-14 |
| 2023-06-30 | $16,378,875 | 57,500 | Shares | Sole | 2023-08-14 |
| 2023-03-31 | $30,390,347 | 109,306 | Shares | Sole | 2023-05-16 |
| 2022-12-31 | $14,538,300 | 52,500 | Shares | Sole | 2023-02-14 |
| 2022-09-30 | $12,682,500 | 47,500 | Shares | Sole | 2022-11-14 |
| 2022-06-30 | $5,098,500 | 25,000 | Shares | Sole | 2022-08-12 |
| 2022-03-31 | $3,159,000 | 15,000 | Shares | Sole | 2022-05-16 |
| 2021-12-31 | $10,556,480 | 44,000 | Shares | Sole | 2022-02-14 |
| 2021-09-30 | $5,659,800 | 20,000 | Shares | Sole | 2021-12-29 |
| 2021-06-30 | $5,194,050 | 15,000 | Shares | Sole | 2021-08-16 |
| 2020-12-31 | $4,897,200 | 20,000 | Shares | Sole | 2021-02-12 |
| 2020-09-30 | $14,184,000 | 50,000 | Shares | Sole | 2020-11-12 |
| 2020-06-30 | $12,708,625 | 47,500 | Shares | Sole | 2020-08-12 |
| 2020-03-31 | $3,163,800 | 10,000 | Shares | Sole | 2020-05-14 |