Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 330,472 | $58,162 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 158,821 | $22,248 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 163,315 | $20,512 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 186,780 | $25,559 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 201,964 | $30,884 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 212,457 | $41,181 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 266,459 | $61,768 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 267,042 | $57,582 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 185,285 | $47,948 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 233,959 | $60,130 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 233,897 | $66,626 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 298,745 | $76,451 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 297,813 | $82,467 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 251,159 | $67,063 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 252,193 | $51,430 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 243,060 | $51,186 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 217,877 | $52,273 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 272,643 | $77,152 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 275,040 | $95,238 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 390,870 | $91,933 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 390,870 | $95,711 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 367,589 | $104,273 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 340,919 | $91,217 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 394,265 | $114,364 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 394,265 | $116,990 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 438,589 | $102,112 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 624,720 | $145,462 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 654,495 | $154,716 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 569,741 | $171,439 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 507,936 | $179,459 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 302,642 | $87,843 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 205,160 | $56,179 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 44,160 | $14,069 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 282,477 | $88,449 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 219,601 | $59,594 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 174,958 | $47,839 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 182,554 | $51,766 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 185,717 | $58,135 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 165,861 | $40,110 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 181,400 | $46,967 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 243,019 | $74,449 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 212,736 | $62,081 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 203,206 | $82,083 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 189,283 | $79,941 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 188,028 | $63,826 | $323.51 | $290.85 - $361.93 |