BLAIR WILLIAM & CO/IL's ownership history for BRK.B

BLAIR WILLIAM & CO/IL currently holds 445.2K shares with a market value of $223.8M. It started holding BRK.B on 2024-09-30. At its peak, it held 445.2K shares on 2025-09-30. Its highest holding value was $224.1M on 2025-03-31. At its lowest, it held 407.9K shares on 2024-09-30, with a value of $187.7M on 2024-09-30. In the recent 180 days, BLAIR WILLIAM & CO/IL has increased its shares by 24.5K. In the recent year, BLAIR WILLIAM & CO/IL has increased its shares by 37.4K.