Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q3 2025 | 17,264 | $2,418 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 16,430 | $2,063 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 21,052 | $2,881 | $142.96 | $128.51 - $157.09 |
| Q1 2024 | 3,595 | $775 | $234.20 | $211.02 - $268.30 |
| Q1 2023 | 2,686 | $747 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 2,563 | $710 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 1,572 | $420 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 4,047 | $825 | $204.43 | $187.16 - $225.50 |
| Q4 2021 | 102,484 | $24,588 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 84,346 | $23,830 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 77,129 | $26,707 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 1,767 | $494 | $269.69 | $238.40 - $296.38 |
| Q3 2020 | 7,175 | $2,035 | $278.91 | $261.87 - $312.00 |
| Q1 2020 | 2,858 | $904 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 1,218 | $361 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 1,714 | $399 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 4,359 | $1,019 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 7,327 | $1,732 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 3,664 | $1,103 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 7,578 | $2,677 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 22,219 | $6,449 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 22,985 | $6,294 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 1,102 | $351 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 1,102 | $345 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 1,102 | $299 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 1,102 | $301 | $282.75 | $260.50 - $301.42 |
| Q2 2016 | 1,102 | $266 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 1,314 | $342 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 1,314 | $407 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 1,314 | $385 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 2,564 | $1,036 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 3,128 | $1,329 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 12,995 | $4,433 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 77,712 | $25,765 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 2,117 | $665 | $300.97 | $272.02 - $322.25 |