Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 1,395 | $0 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,457 | $0 | $135.17 | $121.05 - $150.28 |
| Q4 2024 | 1,494 | $0 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 1,494 | $0 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 1,524 | $0 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 1,524 | $0 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 1,544 | $0 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 1,548 | $0 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 1,743 | $0 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 1,756 | $0 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 1,799 | $0 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 1,798 | $480 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 1,892 | $386 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 2,578 | $542 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 3,363 | $806 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 4,686 | $1,326 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 4,807 | $1,666 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 5,570 | $1,558 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 5,441 | $1,331 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 5,278 | $1,498 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 5,641 | $1,510 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 7,418 | $2,347 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 11,249 | $3,025 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 11,909 | $3,557 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 11,656 | $2,772 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 11,643 | $2,752 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 8,396 | $2,526 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 8,357 | $2,542 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 13,196 | $3,831 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 9,732 | $2,665 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 9,858 | $3,140 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 10,214 | $3,198 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 11,497 | $3,120 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 14,848 | $4,060 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 8,165 | $2,315,000 | $296.43 | $268.00 - $329.83 |