Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 2,178 | $383 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,838 | $257 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 3,635 | $457 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 3,635 | $497 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 2,585 | $395 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 2,149 | $417 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 1,906 | $442 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 1,906 | $411 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 1,925 | $498 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 1,655 | $425 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 1,459 | $416 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 15,865 | $4,411 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 18,182 | $5,035 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 18,836 | $5,029,212 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 47,736 | $9,735,280 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 47,459 | $9,994,865 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 52,930 | $12,698,965 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 22,455 | $6,354,540 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 26,064 | $9,025,181 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 31,460 | $8,800,935 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 30,201 | $7,395,017 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 53,957 | $15,306,521 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 63,526 | $16,996,380 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 59,210 | $18,732,860 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 45,714 | $13,564,714 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 74,264 | $17,290,145 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 87,488 | $20,460,818 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 78,672 | $18,596,488 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 64,136 | $19,299,807 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 62,442 | $22,061,382 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 18,872 | $5,477,410 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 18,872 | $5,167,532 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 14,029 | $4,469,219 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 14,029 | $4,392,761 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 14,415 | $3,911,655 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 49,049 | $13,410,977 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 33,483 | $11,446,449 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 37,748 | $11,816,257 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 35,597 | $7,930,797 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 88,010 | $18,516,639 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 75,952 | $23,267,895 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 130,929 | $38,173,248 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 516,132 | $208,486,360 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 447,651 | $198,728,202 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 537,635 | $182,519,391 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 518,235 | $171,437,320 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 95,918 | $30,243,904 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 85,776 | $26,236,305 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 67,846 | $18,973,318 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 23,294 | $5,608,302 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 19,944 | $4,109,824 | $213.68 | $191.80 - $242.64 |