Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 856 | $151 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 856 | $120 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 856 | $108 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 856 | $117 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 856 | $131 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 924 | $179 | $209.21 | $188.78 - $238.00 |
| Q3 2021 | 760 | $216 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 840 | $291 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 840 | $235 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 858 | $210 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 858 | $244 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 904 | $242 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 1,593 | $504 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 1,210 | $359 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 1,210 | $282 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 1,276 | $298 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 1,331 | $314 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 1,417 | $426 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 1,434 | $506 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,553 | $451 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 1,553 | $424 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 1,599 | $510 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 1,781 | $558 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 1,839 | $499 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 2,054 | $561 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 2,366 | $672 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 3,747 | $1,173 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 4,628 | $1,119 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 48,606 | $12,653 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 39,399 | $12,069 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 39,256 | $11,455 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 39,085 | $15,789 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 38,309 | $16,175 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 50,161 | $17,028 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 49,693 | $16,439 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 49,011 | $15,454 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 36,356 | $11,120 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 37,650 | $10,525 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 50,058 | $12,052 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 52,553 | $11,309 | $213.68 | $191.80 - $242.64 |