Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 14,200 | $2,499 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 24,131 | $3,380 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 27,174 | $3,413 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 26,770 | $3,663 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 28,629 | $4,378 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 28,531 | $5,530 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 26,921 | $6,241 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 19,071 | $4,112 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 19,612 | $5,075 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 17,041 | $4,380 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 13,457 | $3,833 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 13,010 | $3,617 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 23,265 | $6,443 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 23,311 | $6,224 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 24,775 | $5,053 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 28,274 | $5,955 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 33,606 | $8,063 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 38,511 | $10,898 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 38,996 | $13,503 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 40,583 | $11,353 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 42,033 | $10,292 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 39,742 | $11,274 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 46,342 | $12,399 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 44,835 | $14,185 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 60,415 | $17,927 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 55,375 | $12,892 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 61,503 | $14,384 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 67,244 | $15,895 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 67,806 | $20,403 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 84,515 | $29,860 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 80,821 | $23,457 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 85,224 | $23,336 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 91,785 | $29,240 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 101,756 | $31,862 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 95,789 | $25,993 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 102,177 | $27,937 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 109,755 | $31,124 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 126,135 | $39,484 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 131,050 | $31,691 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 137,298 | $35,741 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 172,109 | $52,726 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 180,848 | $52,773 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 191,576 | $77,385 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 192,997 | $81,491 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 184,647 | $62,678 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 166,253 | $54,998 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 154,233 | $48,631 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 192,587 | $58,907 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 159,865 | $44,722 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 128,975 | $31,052 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 122,387 | $26,338 | $213.68 | $191.80 - $242.64 |