BlackRock, Inc.'s ownership history for BIIB

BlackRock, Inc. currently holds 14.8M shares with a market value of $2.6B. It started holding BIIB on 2024-09-30. At its peak, it held 15.5M shares on 2024-12-31. Its highest holding value was $3.0B on 2024-09-30. At its lowest, it held 13.6M shares on 2025-06-30, with a value of $1.7B on 2025-06-30. In the recent 180 days, BlackRock, Inc. has increased its shares by 1.3M. In the recent year, BlackRock, Inc. has decreased its shares by 662.3K.