Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q3 2025 | 9,444 | $1,323 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 17,368 | $2,181 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 20,909 | $2,861 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 21,201 | $3,242 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 21,201 | $4,110 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 21,301 | $4,938 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 21,189 | $4,569 | $234.20 | $211.02 - $268.30 |
| Q2 2023 | 17,163 | $4,889 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 19,433 | $5,403 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 6,800 | $1,883 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 23,312 | $6,224 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 18,356 | $3,744 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 18,556 | $3,908 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 18,656 | $4,476 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 18,656 | $5,279 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 18,593 | $6,438 | $302.94 | $257.03 - $468.55 |
| Q4 2020 | 13,356 | $3,270 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 13,802 | $3,915 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 14,526 | $3,886 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 15,768 | $4,989 | $303.47 | $262.25 - $374.99 |
| Q2 2019 | 20,666 | $4,833 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 4,936 | $20,881 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 20,481 | $6,163 | $319.14 | $278.46 - $358.41 |
| Q1 2018 | 20,824 | $5,702 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 19,080 | $6,078 | $320.80 | $301.81 - $348.84 |
| Q3 2016 | 15,970 | $4,999 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 15,975 | $3,863 | $263.54 | $223.02 - $292.69 |
| Q4 2015 | 15,676 | $4,802 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 16,189 | $4,724 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 14,199 | $5,736 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 13,483 | $5,693 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 10,672 | $3,623 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 8,683 | $2,872 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 7,502 | $2,365 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 7,708 | $2,358 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 7,109 | $1,989 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 6,890 | $1,659 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 6,621 | $1,425 | $213.68 | $191.80 - $242.64 |