Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 1,980 | $349 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,958 | $274 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 1,946 | $244 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 1,736 | $209 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 1,934 | $270 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 1,553 | $270 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 1,899 | $0 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 1,907 | $0 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 1,917 | $415 | $245.62 | $220.86 - $269.43 |
| Q3 2021 | 1,228 | $348 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 1,163 | $403 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 1,135 | $304 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 1,147 | $309 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 1,048 | $345 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 934 | $247 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 896 | $266 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 869 | $249 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 811 | $237 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 845 | $196 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 918 | $210 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 3,135 | $1,044 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 2,863 | $903 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 588 | $202 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 788 | $239 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 824 | $261 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 804 | $249 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 803 | $231 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 803 | $231 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 883 | $259 | $296.43 | $268.00 - $329.83 |
| Q2 2016 | 801 | $252 | $263.54 | $223.02 - $292.69 |
| Q4 2015 | 1,217 | $327 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 1,017 | $297 | $330.23 | $265.00 - $412.24 |