Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 71,075 | $12,513 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 63,754 | $8,931 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 82,336 | $10,341 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 46,684 | $6,388 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 33,846 | $4,976 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 14,087 | $2,731 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 25,664 | $5,949 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 47,222 | $10,182 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 60,626 | $15,688 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 46,830 | $11,769 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 42,621 | $12,166 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 45,589 | $12,675 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 46,063 | $12,756 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 53,554 | $14,299 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 65,040 | $13,264 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 44,702 | $9,414 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 44,505 | $10,678 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 39,814 | $11,267 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 46,441 | $16,081 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 47,569 | $13,307 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 78,191 | $19,146 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 75,702 | $21,475 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 80,418 | $21,516 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 19,807 | $6,267 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 26,118 | $7,750 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 30,442 | $7,088 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 29,812 | $6,972 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 37,740 | $8,921 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 399,153 | $120,113 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 329,975 | $116,583 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 34,915 | $10,134 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 34,083 | $9,333 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 64,544 | $20,562 | $320.80 | $301.81 - $348.84 |
| Q2 2016 | 8,636 | $2,088 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 9,170 | $2,387 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 7,380 | $2,261 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 9,590 | $2,798 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 32,220 | $13,015 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 45,775 | $19,328 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 53,430 | $18,137 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 77,540 | $25,651 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 103,545 | $32,649 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 110,825 | $33,898 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 100,615 | $28,129 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 93,408 | $22,489 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 89,342 | $19,226 | $213.68 | $191.80 - $242.64 |