Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 641,788 | $112,948 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 638,965 | $89,506 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 445,684 | $55,973 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 646,147 | $88,419 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 1,048,419 | $160,324 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 503,853 | $97,667 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 452,511 | $104,901 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 475,826 | $102,602 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 338,354 | $87,556 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 419,798 | $107,892 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 392,732 | $111,870 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 296,084 | $82,320 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 294,275 | $81,491 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 146,817 | $39,201 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 279,310 | $56,962 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 363,518 | $76,557 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 362,112 | $86,877 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 313,963 | $88,849 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 239,209 | $82,831 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 199,066 | $55,689 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 233,265 | $57,117 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 135,530 | $38,447 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 315,940 | $84,530 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 263,497 | $83,365 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 269,999 | $80,117 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 388,266 | $90,397 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 335,090 | $78,368 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 350,299 | $82,803 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 201,215 | $60,549 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 371,811 | $131,364 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 320,910 | $93,141 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 357,267 | $97,826 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 441,629 | $140,690 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 199,509 | $62,471 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 286,317 | $77,694 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 175,059 | $47,864 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 174,127 | $49,380 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 316,721 | $99,144 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 258,761 | $62,574 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 249,748 | $65,014 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 484,849 | $148,533 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 200,042 | $58,375 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 143,185 | $57,838 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 139,358 | $58,843 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 148,965 | $50,566 | $323.51 | $290.85 - $361.93 |