ProShare Advisors LLC's ownership history for BIIB

ProShare Advisors LLC currently holds 41.5K shares with a market value of $7.3M. It started holding BIIB on 2024-09-30. At its peak, it held 238.6K shares on 2025-06-30. Its highest holding value was $32.8M on 2024-09-30. At its lowest, it held 41.5K shares on 2025-12-31, with a value of $7.3M on 2025-12-31. In the recent 180 days, ProShare Advisors LLC has decreased its shares by 197.1K. In the recent year, ProShare Advisors LLC has decreased its shares by 156.8K.