ProShare Advisors LLC's ownership history for BIIB

ProShare Advisors LLC currently holds 197.2K shares with a market value of $27.6M. 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 169.0K shares on 2024-09-30, with a value of $27.6M on 2025-09-30. In the recent 180 days, ProShare Advisors LLC has decreased its shares by 27.5K. In the recent year, ProShare Advisors LLC has increased its shares by 28.1K.