Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 4,370 | $769 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 4,342 | $608 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 4,571 | $574 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 2,697 | $369 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 2,092 | $320 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 2,021 | $392 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 3,298 | $765 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 1,988 | $429 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 2,169 | $561 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 2,206 | $567 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 2,555 | $728 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 2,393 | $665 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 2,466 | $683 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 1,733 | $463 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 1,817 | $371 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 1,881 | $396 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 2,185 | $524 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 2,484 | $703 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 2,405 | $833 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 2,149 | $601 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 2,112 | $517 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 3,577 | $1,015 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 2,649 | $709 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 2,749 | $870 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 2,290 | $680 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 2,469 | $575 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 1,757 | $411 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 2,112 | $499 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 2,234 | $672 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 2,054 | $726 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,973 | $573 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 1,497 | $410 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 1,411 | $450 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 1,309 | $410 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 1,110 | $301 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 1,097 | $300 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 973 | $276 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 965 | $302 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 718 | $174 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 226 | $59 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 211 | $65 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 121 | $35 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 51 | $21 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 23 | $10 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 21 | $7 | $323.51 | $290.85 - $361.93 |
| Q1 2014 | 14 | $4 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 116 | $32 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 116 | $28 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 116 | $25 | $213.68 | $191.80 - $242.64 |