Mason Hawkins - Longleaf Partners
Holding/activity history for Biogen Inc. (BIIB)
| Period | Shares | % of Portfolio | Activity | % Change to Portfolio | Reported Price |
| 2022 Q2 | 0 | 0 | Sell 100.00% | 4.24 | |
| 2022 Q1 | 337,077 | 4.24 | $210.60 | ||
| 2021 Q4 | 337,077 | 4.86 | Buy | 4.86 | $239.92 |
| 2021 Q2 | 0 | 0 | Sell 100.00% | 4.59 | |
| 2021 Q1 | 249,422 | 4.59 | Buy | 4.59 | $279.75 |