Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 17 | $3 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 19 | $3 | $135.17 | $121.05 - $150.28 |
| Q4 2023 | 1 | $0 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 1 | $0 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 1 | $0 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 1 | $0 | $276.70 | $254.80 - $295.90 |
| Q2 2022 | 1 | $1 | $204.43 | $187.16 - $225.50 |
| Q1 2021 | 6 | $2 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 4 | $1 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 5 | $2 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 1,053 | $282 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 4 | $2 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 5 | $2 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 5 | $2 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 829 | $194 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 3 | $1 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 799 | $241 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 1,046 | $370 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,106 | $321 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 10,272 | $2,813 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 9,782 | $3,117 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 4 | $2 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 4 | $1 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 3 | $1 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 3 | $1 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 3 | $1 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 3 | $1 | $263.54 | $223.02 - $292.69 |
| Q1 2015 | 16 | $7 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 1,011 | $344 | $323.51 | $290.85 - $361.93 |
| Q1 2014 | 1,250 | $383 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 849 | $238 | $258.65 | $221.07 - $298.82 |