Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 3,203 | $564 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,789 | $251 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 1,940 | $244 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 1,697 | $232 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 1,823 | $279 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 3,538 | $686 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 4,365 | $1,012 | $217.32 | $189.44 - $237.54 |
| Q4 2023 | 4,374 | $1,132 | $245.62 | $220.86 - $269.43 |
| Q3 2021 | 7,793 | $2,205 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 3,963 | $1,372 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 6,263 | $1,752 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 8,530 | $2,089 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 5,901 | $1,674 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 5,779 | $1,546 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 5,612 | $1,775 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 7,350 | $2,181 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 5,456 | $1,270 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 5,918 | $1,353 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 7,902 | $1,868 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 7,099 | $2,136 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 5,650 | $1,996 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 3,740 | $1,085 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 5,614 | $1,537 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 4,756 | $1,515 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 3,806 | $1,192 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 2,906 | $789 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 1,949 | $533 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 1,527 | $433 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 1,273 | $398 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 1,016 | $253 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 1,274 | $332 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 900 | $253 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 707 | $206 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 888 | $359 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 581 | $245 | $394.14 | $334.40 - $480.18 |
| Q3 2014 | 608 | $201 | $329.72 | $298.31 - $349.00 |