Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 1,604 | $282 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,189 | $167 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 1,100 | $138 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 1,162 | $132 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 1,384 | $209 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 1,532 | $297 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 2,571 | $586 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 2,679 | $575 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 2,710 | $701 | $245.62 | $220.86 - $269.43 |
| Q1 2022 | 1,108 | $233 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 1,374 | $330 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 1,370 | $388 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 1,824 | $632 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 1,839 | $514 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 1,782 | $436 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 1,804 | $512 | $278.91 | $261.87 - $312.00 |
| Q1 2020 | 1,923 | $608 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 1,665 | $494 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 2,063 | $480 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 7,280 | $1,703 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 7,348 | $1,737 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 729 | $219 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 24,998 | $8,833 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 21,760 | $6,316 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 20,356 | $5,573 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 20,405 | $6,499 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 16,692 | $5,226 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 15,848 | $4,300 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 55,260 | $15,109 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 55,742 | $15,808 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 53,922 | $16,880 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 52,806 | $12,770 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 34,595 | $9,007 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 13,158 | $4,031 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 12,688 | $3,703 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 11,102 | $4,484 | $401.33 | $368.88 - $432.88 |