Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 276,809 | $48,716 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 270,498 | $37,891 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 163,489 | $20,533 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 99,228 | $13,578 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 89,626 | $13,706 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 42,444 | $8,227 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 23,557 | $5,461 | $217.32 | $189.44 - $237.54 |
| Q4 2023 | 3,684 | $953 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 19,450 | $4,999 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 31,148 | $8,873 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 19,874 | $5,526 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 18,369 | $5,087 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 11,116 | $2,968 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 16,147 | $3,293 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 25,239 | $5,315 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 10,084 | $2,419 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 13,742 | $3,889 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 2,910 | $1,008 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 14,824 | $4,147 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 23,008 | $5,634 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 31,043 | $8,806 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 99,882 | $26,723 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 133,975 | $42,387 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 159,766 | $47,407 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 175,027 | $40,750 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 155,286 | $36,317 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 151,252 | $35,753 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 106,435 | $32,028 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 79,271 | $28,007 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 85,107 | $24,701 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 111,801 | $30,613 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 87,874 | $27,994 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 63,039 | $19,739 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 162,464 | $44,086 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 275,460 | $75,316 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 240,311 | $68,147 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 245,468 | $76,839 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 368,095 | $89,013 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 298,673 | $77,751 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 84,577 | $25,910 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 9,410 | $2,746 | $330.23 | $265.00 - $412.24 |
| Q4 2014 | 5,012 | $1,701 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 31,391 | $10,384 | $329.72 | $298.31 - $349.00 |
| Q1 2014 | 3,931 | $1,202 | $317.43 | $270.62 - $358.89 |