Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 1,206 | $212 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,096 | $154 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 1,085 | $136 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 865 | $118 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 795 | $122 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 750 | $145 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 737 | $171 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 817 | $176 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 818 | $212 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 805 | $207 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 833 | $247 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 585 | $174 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 1,117 | $0 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 2,215 | $667 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 7 | $2 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 878 | $265 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 620 | $151 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 10,852 | $3,077 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 10,534 | $3,645 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 9,986 | $2,793 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 7,832 | $1,900 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 6,747 | $1,913 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 6,213 | $1,626 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 900 | $276 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 1,733 | $525 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 1,550 | $356 | $232.85 | $215.78 - $246.99 |
| Q1 2019 | 487 | $112 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 1,131 | $332 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 1,387 | $490 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,481 | $430 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 3,268 | $1,041 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 3,268 | $1,041 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 3,330 | $1,043 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 2,264 | $614 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 2,118 | $579 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 1,944 | $551 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 1,374 | $430 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 1,368 | $331 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 487 | $112 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 2,510 | $769 | $287.35 | $254.00 - $311.65 |