Parallax Volatility Advisers, L.P.'s ownership history for BIIB

Parallax Volatility Advisers, L.P. currently holds 2.2K shares with a market value of $393.7K. It started holding BIIB on 2024-09-30. At its peak, it held 14.4K shares on 2024-09-30. Its highest holding value was $2.8M on 2024-09-30. At its lowest, it held 2.2K shares on 2025-12-31, with a value of $393.7K on 2025-12-31. In the recent 180 days, Parallax Volatility Advisers, L.P. has decreased its shares by 12.2K.

It has also owned 75 contracts of calls, with the market value of the underlying securities totaling $1.1M on 2025-09-30. At its peak, it held 75 contracts of calls on 2025-09-30 and it owned calls with the market value of the underlying securities totaling $1.1M on 2025-09-30. At its lowest, it held 75 contracts of calls on 2025-09-30 and it owned calls with the market value of the underlying securities totaling $1.1M on 2025-09-30.

It has also owned 2 contracts of puts, with the market value of the underlying securities totaling $38.8K on 2024-09-30. At its peak, it held 2 contracts of puts on 2024-09-30 and it owned puts with the market value of the underlying securities totaling $38.8K on 2024-09-30. At its lowest, it held 2 contracts of puts on 2024-09-30 and it owned puts with the market value of the underlying securities totaling $38.8K on 2024-09-30.