Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 1,145,890 | $201,665 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,451,249 | $203,291 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 1,319,991 | $165,778 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 1,352,560 | $185,084 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 2,667,531 | $407,919 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 19,507 | $3,781 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 19,066 | $4,420 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 16,917 | $3,648 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 28,929 | $7,486 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 16,586 | $4,263 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 14,780 | $4,210 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 16,960 | $4,715 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 4,803 | $1,330 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 347,065 | $92,666 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 487,626 | $99,446 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 324,148 | $68,266 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 12,417 | $2,979 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 15,652 | $4,429 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 55,146 | $19,095 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 36,995 | $10,349 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 35,835 | $8,775 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 40,395 | $11,459 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 42,448 | $11,357 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 27,424 | $9,394 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 14,214 | $4,218 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 54,641 | $12,722 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 53,761 | $12,573 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 43,510 | $10,284 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 10,830 | $3,259 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 28,349 | $10,016 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 19,399 | $5,631 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 13,670 | $3,743 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 11,647 | $3,710 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 7,985 | $2,500 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 7,028 | $1,907 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 6,361 | $1,739 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 6,178 | $1,752 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 6,237 | $1,952 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 6,387 | $1,544 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 6,196 | $1,612 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 6,201 | $1,899 | $287.35 | $254.00 - $311.65 |