Walleye Trading LLC's ownership history for BIIB

Walleye Trading LLC currently holds 95.5K shares with a market value of $16.8M. It started holding BIIB on 2025-03-31. At its peak, it held 95.5K shares on 2025-12-31. Its highest holding value was $16.8M on 2025-12-31. At its lowest, it held 11.2K shares on 2025-03-31, with a value of $1.5M on 2025-03-31.

It has also owned 345 contracts of calls, with the market value of the underlying securities totaling $6.1M on 2024-12-31. At its peak, it held 345 contracts of calls on 2025-12-31 and it owned calls with the market value of the underlying securities totaling $6.1M on 2025-12-31. At its lowest, it held 135 contracts of calls on 2025-09-30 and it owned calls with the market value of the underlying securities totaling $1.9M on 2025-09-30. In the recent 180 days, Walleye Trading LLC has increased its holdings by 151 contracts. In the recent year, Walleye Trading LLC has increased its holdings by 194 contracts.

It has also owned 186 contracts of puts, with the market value of the underlying securities totaling $3.3M on 2024-12-31. At its peak, it held 412 contracts of puts on 2025-03-31 and it owned puts with the market value of the underlying securities totaling $5.6M on 2025-03-31. At its lowest, it held 32 contracts of puts on 2025-09-30 and it owned puts with the market value of the underlying securities totaling $448.3K on 2025-09-30. In the recent 180 days, Walleye Trading LLC has increased its holdings by 70 contracts. In the recent year, Walleye Trading LLC has increased its holdings by 95.4K contracts.