Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 131,761 | $23,188 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 145,409 | $20,370 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 126,056 | $15,832 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 102,551 | $14,033 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 144,023 | $22,024 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 1,150,486 | $223,012 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 1,450,005 | $336,138 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 798,660 | $172,300 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 202,487 | $52,398 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 218,365 | $56,122 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 198,727 | $56,609 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 210,840 | $58,622 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 123,921 | $34,315 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 120,161 | $32,249 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 120,742 | $24,513 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 158,853 | $32,828 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 670,925 | $159,756 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 380,636 | $107,708 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 189,409 | $65,588 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 197,922 | $55,365 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 99,166 | $24,278 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 126,949 | $36,014 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 126,331 | $33,741 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 181,249 | $57,339 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 195,779 | $58,104 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 221,222 | $51,511 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 254,846 | $59,246 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 581,856 | $137,446 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 2,197,485 | $661,245 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 2,785,923 | $1,058,530 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 2,777,505 | $806,144 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 2,605,849 | $713,510 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 2,607,446 | $830,679 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 2,309,394 | $723,142 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 1,709,010 | $463,777 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 1,873,529 | $512,352 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 3,578,127 | $1,014,715 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 3,524,954 | $1,103,419 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 3,695,173 | $893,566 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 4,097,151 | $1,066,572 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 3,996,093 | $1,222,968 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 3,809,329 | $1,111,313 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 2,613,987 | $1,055,896 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 3,235,509 | $1,366,109 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 2,769,523 | $940,112 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 2,581,488 | $853,979 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 2,581,552 | $813,987 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 2,642,124 | $808,150 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 2,450,728 | $685,529 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 2,161,970 | $520,512 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 2,544,106 | $547,492 | $213.68 | $191.80 - $242.64 |