Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 945 | $166 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 962 | $135 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 990 | $124 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 1,072 | $147 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 1,481 | $226 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 2,172 | $421 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 1,742 | $404 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 1,871 | $403 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 1,800 | $466 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 11,200 | $2,879 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 1,811 | $516 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 1,848 | $514 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 2,005 | $555 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 1,942 | $519 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 1,928 | $393 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 1,935 | $408 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 2,101 | $504 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 1,928 | $546 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 2,051 | $710 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 2,769 | $774,628 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 2,300 | $563 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 2,383 | $676 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 1,989 | $532 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 1,591 | $503 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 2,270 | $673 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 2,421 | $563 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 2,120 | $495 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 2,861 | $676 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 3,785 | $1,138 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 3,929 | $1,388 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 4,755 | $1,380 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 4,703 | $1,287 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 4,161 | $1,325 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 2,532 | $792 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 1,491 | $404 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 1,002 | $273 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 450 | $127 | $296.43 | $268.00 - $329.83 |