CITIGROUP INC's ownership history for BIIB

CITIGROUP INC currently holds 573.8K shares with a market value of $101.0M. It started holding BIIB on 2024-09-30. At its peak, it held 573.8K shares on 2025-12-31. Its highest holding value was $101.0M on 2025-12-31. At its lowest, it held 202.3K shares on 2025-09-30, with a value of $28.0M on 2025-06-30. In the recent 180 days, CITIGROUP INC has increased its shares by 350.6K. In the recent year, CITIGROUP INC has increased its shares by 309.5K.

It has also owned 791 contracts of calls, with the market value of the underlying securities totaling $13.9M on 2024-09-30. At its peak, it held 1.6K contracts of calls on 2024-12-31 and it owned calls with the market value of the underlying securities totaling $25.1M on 2024-12-31. At its lowest, it held 32 contracts of calls on 2024-09-30 and it owned calls with the market value of the underlying securities totaling $620.3K on 2024-09-30. In the recent 180 days, CITIGROUP INC has increased its holdings by 0 contracts. In the recent year, CITIGROUP INC has decreased its holdings by 852 contracts.

It has also owned 146 contracts of puts, with the market value of the underlying securities totaling $2.6M on 2024-09-30. At its peak, it held 295 contracts of puts on 2025-03-31 and it owned puts with the market value of the underlying securities totaling $4.1M on 2024-12-31. At its lowest, it held 48 contracts of puts on 2024-09-30 and it owned puts with the market value of the underlying securities totaling $930.4K on 2024-09-30. In the recent 180 days, CITIGROUP INC has increased its holdings by 0 contracts. In the recent year, CITIGROUP INC has increased its holdings by 573.6K contracts.