Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 2,445 | $430 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 8,271 | $1,159 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 5,986 | $752 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 7,067 | $967 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 26,046 | $3,983 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 19,446 | $3,769 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 6,573 | $1,524 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 10,881 | $2,346 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 5,190 | $1,343 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 5,904 | $1,517 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 2,211 | $630 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 3,460 | $962 | $276.70 | $254.80 - $295.90 |
| Q2 2022 | 340 | $69 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 4,889 | $1,030 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 18,557 | $4,452 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 11,119 | $3,147 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 6,966 | $2,412 | $302.94 | $257.03 - $468.55 |
| Q4 2020 | 18,842 | $4,614 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 3,723 | $1,056 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 6,246 | $1,671 | $300.59 | $257.60 - $350.24 |
| Q4 2019 | 303 | $90 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 23,084 | $5,374 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 27,898 | $6,525 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 29,637 | $7,006 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 2,145 | $645 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 3,337 | $1,179 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,906 | $553 | $281.15 | $249.17 - $310.91 |
| Q2 2017 | 11,400 | $3,093 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 17,600 | $4,812 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 6 | $1 | $296.43 | $268.00 - $329.83 |
| Q2 2016 | 11,685 | $2,825 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 13,005 | $3,385 | $264.15 | $242.07 - $301.02 |
| Q3 2013 | 3,179 | $765 | $223.81 | $203.55 - $248.95 |