Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 1,925 | $339 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,810 | $254 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 1,896 | $238 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 2,236 | $306 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 2,696 | $412 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 3,196 | $620 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 3,495 | $810 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 3,524 | $760 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 4,023 | $1,041 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 4,032 | $1,036 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 3,990 | $1,137 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 4,010 | $1,115 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 4,663 | $1,291 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 4,739 | $1,265 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 4,824 | $984 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 3,466 | $730 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 3,821 | $917 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 4,109 | $1,163 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 4,216 | $1,460 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 4,021 | $1,125 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 4,305 | $1,054 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 4,809 | $1,364 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 5,704 | $1,526 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 6,858 | $2,170 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 7,355 | $2,182 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 7,544 | $1,756 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 7,566 | $1,769 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 7,663 | $1,811 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 8,074 | $2,430 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 8,408 | $2,971 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 8,523 | $2,474 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 8,951 | $2,451 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 9,040 | $2,880 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 8,877 | $2,780 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 9,086 | $2,466 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 8,568 | $2,343 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 7,911 | $2,243 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 8,099 | $2,535 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 7,721 | $1,867 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 7,175 | $1,868 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 6,841 | $2,096 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 949 | $277 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 1,094 | $442 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 1,333 | $562 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 975 | $331 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 1,045 | $346 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 804 | $254 | $300.97 | $272.02 - $322.25 |