Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 89,537 | $15,758 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 70,164 | $9,829 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 70,194 | $8,816 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 44,321 | $6,065 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 26,138 | $3,997 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 44,391 | $8,605 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 51,498 | $11,938 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 48,165 | $10,386 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 45,070 | $11,663 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 50,810 | $13,059 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 42,029 | $11,972 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 42,529 | $11,824 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 42,551 | $11,783 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 41,025 | $10,954 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 45,813 | $9,343 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 46,096 | $9,708 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 45,984 | $11,033 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 49,257 | $13,939 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 37,937 | $13,136 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 41,370 | $11,573 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 39,825 | $9,751 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 37,086 | $10,521 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 32,976 | $8,823 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 31,208 | $9,874 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 33,550 | $9,955 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 33,933 | $7,900 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 33,957 | $7,942 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 45,159 | $10,672 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 45,184 | $13,597 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 42,666 | $15,074 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 42,938 | $12,462 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 47,951 | $13,130 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 50,882 | $16,209 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 45,381 | $14,210 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 23,534 | $6,386 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 12,408 | $3,384 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 10,333 | $3,013 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 10,396 | $3,238 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 8,362 | $2,069 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 40,888 | $10,861 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 46,364 | $13,756 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 17,221 | $4,935 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 16,448 | $6,655 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 25,014 | $10,351 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 21,408 | $7,267 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 22,996 | $7,439 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 18,853 | $5,945 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 17,218 | $5,266 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 20,545 | $5,744 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 21,444 | $5,122 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 17,420 | $3,749 | $213.68 | $191.80 - $242.64 |