Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 14,116 | $2 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 14,599 | $2 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 14,599 | $2 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 14,599 | $2 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 33,799 | $5 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 33,799 | $7 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 30,555 | $7 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 29,874 | $6 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 24,322 | $6 | $245.62 | $220.86 - $269.43 |
| Q2 2023 | 4,160 | $1 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 3,465 | $1 | $276.70 | $254.80 - $295.90 |
| Q4 2021 | 2,694 | $646 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 2,694 | $762 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 3,834 | $1,328 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 3,443 | $963 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 5,206 | $1,275 | $259.08 | $223.25 - $363.92 |
| Q2 2020 | 4,468 | $1,195 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 8,165 | $2,583 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 11,247 | $3,337 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 7,669 | $1,785 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 5,591 | $1,308 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 16,159 | $3,820 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 46,917 | $14,118 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 57,269 | $20,234 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 78,746 | $22,855 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 78,068 | $21,377 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 51,777 | $16,495 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 52,608 | $16,473 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 55,999 | $15,196 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 33,376 | $9,126 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 16,466 | $4,669 | $296.43 | $268.00 - $329.83 |
| Q3 2014 | 3,818 | $1,263 | $329.72 | $298.31 - $349.00 |