Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 2,969 | $523 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 2,866 | $401 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 2,826 | $355 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 1,614 | $221 | $142.96 | $128.51 - $157.09 |
| Q1 2024 | 2,557 | $551 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 2,396 | $620 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 2,396 | $616 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 3,306 | $942 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 3,596 | $1,000 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 3,860 | $1,069 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 2,539 | $677,913 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 2,516 | $513 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 2,516 | $530 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 6,144 | $1,474 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 3,814 | $1,079 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 2,269 | $786 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 2,489 | $696 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 4,173 | $1,022 | $259.08 | $223.25 - $363.92 |
| Q1 2020 | 1,095 | $346 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 1,559 | $463 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 1,881 | $438 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 1,881 | $440 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 1,881 | $445 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 1,445 | $435 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 1,860 | $657 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,746 | $507 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 1,691 | $463 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 1,434 | $457 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 3,229 | $1,011 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 3,229 | $876 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 2,499 | $683 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 2,063 | $585 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 1,972 | $617 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 2,174 | $526 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 2,374 | $618 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 2,193 | $672 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 2,193 | $640 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 1,990 | $804 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 1,990 | $840 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 1,900 | $645 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 2,190 | $724 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 2,330 | $735 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 2,150 | $658 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 1,950 | $546 | $258.65 | $221.07 - $298.82 |