FMR LLC
- SEC CIK
- 0000315066
BIIB holding history
BIOGEN INC.
Every 13F filing in which FMR LLC reported holding BIIB, plus the quarters it sold out. Changes compare share counts with the previous calendar quarter.
BIIB overviewAll 13F holders of BIIBFull portfolio
| Quarter | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Q2 2026 | 18,217,239 | $3.94B | 0.17% | +5,409,698+42.2% | Added |
| Q1 2026 | 12,807,541 | $2.35B | 0.12% | +3,381,678+35.9% | Added |
| Q4 2025 | 9,425,863 | $1.66B | 0.08% | +8,138,103+632.0% | Added |
| Q3 2025 | 1,287,760 | $180.39M | 0.01% | −386,460−23.1% | Reduced |
| Q2 2025 | 1,674,220 | $210.27M | 0.01% | +365,392+27.9% | Added |
| Q1 2025 | 1,308,828 | $179.1M | 0.01% | +551,258+72.8% | Added |
| Q4 2024 | 757,570 | $115.85M | 0.01% | +376,356+98.7% | Added |
| Q3 2024 | 381,214 | $73.89M | 0.00% | −229,202−37.5% | Reduced |
| Q2 2024 | 610,416 | $141.51M | 0.01% | −10,434−1.7% | Reduced |
| Q1 2024 | 620,850 | $133.87M | 0.01% | −380,294−38.0% | Reduced |
| Q4 2023 | 1,001,144 | $259.07M | 0.02% | −359,907−26.4% | Reduced |
| Q3 2023 | 1,361,051 | $349.8M | 0.03% | −1,279,470−48.5% | Reduced |
| Q2 2023 | 2,640,521 | $752.15M | 0.06% | −864,707−24.7% | Reduced |
| Q1 2023 | 3,505,228 | $974.56M | 0.04% | +2,294,035+189.4% | Added |
| Q4 2022 | 1,211,193 | $335.4M | 0.03% | −265,039−18.0% | Reduced |
| Q3 2022 | 1,476,232 | $394.15M | 0.04% | +450,066+43.9% | Added |
| Q2 2022 | 1,026,166 | $209.28M | 0.02% | +638,196+164.5% | Added |
| Q1 2022 | 387,970 | $81.71M | 0.01% | +200,669+107.1% | Added |
| Q4 2021 | 187,301 | $44.94M | 0.00% | −990,252−84.1% | Reduced |
| Q3 2021 | 1,177,553 | $333.24M | 0.03% | −174,665−12.9% | Reduced |
| Q2 2021 | 1,352,218 | $468.23M | 0.04% | −562,998−29.4% | Reduced |
| Q1 2021 | 1,915,216 | $535.78M | 0.05% | +1,915,216 | New |