Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 7,708 | $1,408 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 7,721 | $1,234 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 7,746 | $973 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 7,746 | $1,060 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 7,832 | $1,198 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 7,909 | $1,533 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 7,976 | $1,849 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 7,996 | $1,724 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 7,930 | $2,052 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 8,767 | $2,253 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 8,731 | $2,487 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 8,731 | $2,427 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 8,540 | $2,365 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 8,552 | $2,284 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 8,702 | $1,775 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 8,609 | $1,813 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 8,609 | $2,065 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 8,619 | $2,439 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 8,560 | $2,964 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 9,096 | $2,544 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 9,222 | $2,258 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 9,266 | $2,628 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 9,266 | $2,479 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 9,668 | $3,059 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 9,650 | $2,864 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 9,944 | $2,315 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 13,443 | $3,143 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 14,262 | $3,371 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 14,233 | $4,283 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 14,149 | $4,999 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 14,084 | $4,087 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 13,969 | $3,825 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 15,992 | $5,095 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 15,727 | $4,924 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 15,713 | $4,263 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 15,746 | $4,305 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 15,482 | $4,390 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 7,469 | $2,338 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 7,712 | $1,865 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 7,748 | $2,017 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 8,383 | $2,568 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 7,458 | $2,176 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 1,000 | $404 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 875 | $369 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 875 | $297 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 875 | $289 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 875 | $276 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 875 | $268 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 875 | $245 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 875 | $211 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 875 | $188 | $213.68 | $191.80 - $242.64 |