Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 4,619 | $813 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 5,745 | $805 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 5,586 | $702 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 4,757 | $651 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 4,570 | $699 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 4,363 | $846 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 4,350 | $1,008 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 4,148 | $894 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 4,020 | $1,040 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 3,987 | $1,025 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 3,663 | $1,043 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 3,458 | $961 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 2,305 | $1 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 1,693 | $452 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 641 | $130 | $204.43 | $187.16 - $225.50 |
| Q4 2020 | 450 | $110 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 511 | $145 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 1,420 | $380 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 2,015 | $638 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 1,938 | $575 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 1,890 | $440 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 1,880 | $439 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 4,997 | $1,181 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 4,931 | $1,484 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 4,979 | $1,759 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 5,015 | $1,455 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 4,882 | $1,337 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 4,807 | $1,531 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 4,824 | $1,511 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 4,929 | $1,337 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 4,707 | $1,287 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 4,564 | $1,294 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 4,310 | $1,349 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 3,365 | $813 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 2,950 | $768 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 1,660 | $509 | $287.35 | $254.00 - $311.65 |