MILLENNIUM MANAGEMENT LLC's ownership history for BIIB

MILLENNIUM MANAGEMENT LLC currently holds 1.1M shares with a market value of $155.7M. It started holding BIIB on 2024-09-30. At its peak, it held 1.1M shares on 2025-09-30. Its highest holding value was $155.7M on 2025-09-30. At its lowest, it held 398.1K shares on 2024-09-30, with a value of $58.0M on 2025-03-31. In the recent 180 days, MILLENNIUM MANAGEMENT LLC has increased its shares by 687.2K. In the recent year, MILLENNIUM MANAGEMENT LLC has increased its shares by 713.1K.

It has also owned 856 contracts of calls, with the market value of the underlying securities totaling $12.0M on 2024-09-30. At its peak, it held 856 contracts of calls on 2025-09-30 and it owned calls with the market value of the underlying securities totaling $12.0M on 2025-09-30. At its lowest, it held 248 contracts of calls on 2025-06-30 and it owned calls with the market value of the underlying securities totaling $3.1M on 2025-06-30. In the recent 180 days, MILLENNIUM MANAGEMENT LLC has increased its holdings by 296 contracts. In the recent year, MILLENNIUM MANAGEMENT LLC has increased its holdings by 560 contracts.

It has also owned 2.6K contracts of puts, with the market value of the underlying securities totaling $36.6M on 2024-09-30. At its peak, it held 2.6K contracts of puts on 2025-09-30 and it owned puts with the market value of the underlying securities totaling $36.6M on 2025-09-30. At its lowest, it held 273 contracts of puts on 2024-12-31 and it owned puts with the market value of the underlying securities totaling $4.2M on 2024-12-31. In the recent 180 days, MILLENNIUM MANAGEMENT LLC has increased its holdings by 1.9K contracts. In the recent year, MILLENNIUM MANAGEMENT LLC has increased its holdings by 1.1M contracts.