Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 6,019 | $1,059 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 6,019 | $843 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 6,019 | $756 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 10,719 | $1,467 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 10,719 | $1,639 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 10,719 | $2,078 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 10,719 | $2,485 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 11,459 | $2,471 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 11,459 | $3 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 21,681 | $5,572 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 24,181 | $6,888 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 14,086 | $3,916 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 14,086 | $3,901 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 14,086 | $3,761 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 17,086 | $3,485 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 17,086 | $3,598 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 17,086 | $4,099 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 17,086 | $4,835 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 16,401 | $5,679 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 12,553 | $3,512 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 12,553 | $3,074 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 12,553 | $3,561 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 15,194 | $4,065 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 15,672 | $4,958 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 15,442 | $4,582 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 19,086 | $4,444 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 19,205 | $4,491 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 23,231 | $5,491 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 23,165 | $6,971 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 23,409 | $8,271 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 31,230 | $9,064 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 29,798 | $8,159 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 34,034 | $10,842 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 34,541 | $10,815 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 37,639 | $10,214 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 38,886 | $10,632 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 44,450 | $12,605 | $296.43 | $268.00 - $329.83 |