Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 13,987 | $2 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 82,091 | $11 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 18,195 | $2 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 14,651 | $2 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 15,836 | $2 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 188,653 | $37 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 192,507 | $45 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 201,396 | $43 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 259,357 | $67 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 280,647 | $72 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 289,304 | $82 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 297,142 | $83 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 298,608 | $83 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 308,822 | $82,456 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 261,340 | $53,298 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 270,244 | $56,913 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 259,277 | $62,205 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 227,616 | $64,414 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 190,285 | $65,890 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 160,592 | $44,926 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 153,384 | $37,558 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 159,825 | $45,339 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 166,796 | $44,627 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 170,667 | $53,995 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 90,906 | $26,975 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 79,569 | $18,525 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 114,481 | $26,774 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 270,959 | $64,050 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 445,059 | $133,928 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 431,436 | $152,431 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 435,007 | $126,256 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 291,045 | $79,694 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 309,470 | $98,588 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 310,218 | $97,135 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 241,123 | $65,431 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 243,220 | $66,502 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 51,310 | $14,551 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 28,540 | $8,933 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 6,771 | $1,638 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 6,370 | $1,658 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 6,270 | $1,921 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 6,400 | $1,868 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 6,100 | $2,464 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 8,200 | $3,462 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 28,550 | $9,691 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 29,950 | $9,908 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 38,100 | $12,013 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 5,500 | $1,682 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 5,500 | $1,538 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 36,800 | $8,860 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 37,730 | $8,120 | $213.68 | $191.80 - $242.64 |