Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 6,200 | $1,091 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 6,913 | $968 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 10,936 | $1,373 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 44,796 | $6,130 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 43,460 | $6,646 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 43,349 | $8,403 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 42,737 | $9,907 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 42,839 | $9,237 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 43,216 | $11,183 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 129,741 | $33,345 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 216,676 | $61,720 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 355,535 | $98,849 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 531,412 | $147 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 603,216 | $161,059 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 639,057 | $130,329 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 552,479 | $116,352 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 346,269 | $83,077 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 751,389 | $212,636 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 352,079 | $121,914 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 264,020 | $73,860 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 250,846 | $61,422 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 133,639 | $37,911 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 326,895 | $87,461 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 131,749 | $41,683 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 476,841 | $141,493 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 674,932 | $157,138 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 46,699 | $10,921 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 320,440 | $75,746 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 258,800 | $77,878 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 212,207 | $74,975 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 253,680 | $73,628 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 153,734 | $42,095 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 93,118 | $29,665 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 394,397 | $123,494 | $296.11 | $269.50 - $330.00 |
| Q4 2016 | 81,184 | $23,022 | $296.43 | $268.00 - $329.83 |