Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 6,378 | $1,122 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 6,357 | $890 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 6,236 | $783 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 6,963 | $953 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 7,085 | $1,083 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 9,915 | $1,922 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 8,901 | $2,063 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 9,221 | $1,988 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 9,162 | $2,371 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 9,237 | $2,374 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 9,400 | $2,678 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 9,282 | $2,581 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 9,431 | $2,612 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 9,421 | $2,515 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 9,261 | $1,889 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 8,875 | $1,869 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 11,073 | $2,657 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 10,864 | $3,074 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 9,419 | $3,262 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 29,003 | $8,113 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 30,566 | $7,485 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 31,006 | $8,796 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 31,570 | $8,446 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 29,999 | $9,491 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 29,322 | $8,701 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 28,734 | $6,690 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 29,092 | $6,804 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 29,577 | $6,992 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 29,982 | $9,022 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 29,150 | $10,299 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 28,948 | $8,402 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 28,463 | $7,793 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 28,825 | $9,183 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 28,675 | $8,978 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 28,425 | $7,713 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 28,504 | $7,794 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 27,822 | $7,889 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 28,285 | $8,854 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 27,675 | $6,692 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 27,712 | $7,214 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 29,107 | $8,917 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 28,946 | $8,447 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 30,980 | $12,514 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 30,940 | $13,064 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 30,946 | $10,504 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 30,878 | $10,215 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 30,333 | $9,565 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 30,264 | $9,257 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 30,316 | $8,475 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 32,919 | $7,926 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 33,228 | $7,150 | $213.68 | $191.80 - $242.64 |
| Q1 2013 | 33,584 | $6,469 | $161.63 | $139.72 - $192.92 |