BIIB holders · CITADEL ADVISORS LLC 13F · BIIB stock
CITADEL ADVISORS LLC Biogen Inc (BIIB) 13F holding
CITADEL ADVISORS LLC reported 299,900 BIIB shares valued at $54.98B as of 2026-03-31 (COM), Call. Cached 13F row, not a live tape.
| Report | Shares | Value | Class |
|---|---|---|---|
| 2026-03-31 | 299,900 | $54.98B | Call |
| 2026-03-31 | 97,381 | $17.85B | COM |
| 2026-03-31 | 92,700 | $16.99B | Put |
| 2026-03-31 | 40,712 | $7.46B | COM |
| 2025-12-31 | 407,000 | $71.63B | Call |
| 2025-12-31 | 162,000 | $28.51B | Put |
| 2025-12-31 | 36,034 | $6.34B | COM |
| 2025-12-31 | 4,390 | $772.6M | COM |
| 2025-09-30 | 372,728 | $52.21B | COM |
| 2025-09-30 | 241,200 | $33.79B | Call |
| 2025-09-30 | 158,000 | $22.13B | Put |
| 2025-06-30 | 608,590 | $76.43B | COM |
| 2025-06-30 | 473,100 | $59.42B | Call |
| 2025-06-30 | 263,800 | $33.13B | Put |
Not investment advice. Cached 13F row, not EDGAR XML.