Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 4,397 | $774 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 4,682 | $1 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 4,971 | $1 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 6,612 | $1 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 7,156 | $1 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 5,854 | $1 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 6,243 | $1 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 7,494 | $2 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 5,342 | $1 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 5,632 | $1 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 5,215 | $1 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 3,830 | $1 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 2,823 | $1 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 2,633 | $703 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 2,487 | $507 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 4,033 | $849 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 3,380 | $811 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 3,285 | $930 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 2,442 | $846 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 4,569 | $1,278 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 2,552 | $625 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 1,677 | $476 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 1,346 | $360 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 1,167 | $369 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 801 | $238 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 89 | $21 | $232.85 | $215.78 - $246.99 |
| Q3 2018 | 8,541 | $3,018 | $344.30 | $288.13 - $388.67 |
| Q4 2015 | 61,500 | $18,841 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 61,800 | $18,034 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 88,600 | $35,789 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 44,600 | $18,832 | $394.14 | $334.40 - $480.18 |