Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 251,763 | $44,308 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 205,233 | $28,749 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 507,539 | $63,742 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 879,330 | $120,328 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 852,336 | $130,339 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 648,702 | $125,744 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 212,899 | $49,354 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 326,425 | $70,387 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 54,025 | $13,980 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 19,514 | $5,015 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 25,166 | $7,169 | $297.86 | $273.39 - $319.76 |
| Q4 2022 | 213,939 | $59,244 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 150,818 | $40,268 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 244,780 | $49,920 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 663,532 | $139,740 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 477,661 | $114,600 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 139,630 | $39,514 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 23,189 | $8,030 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 6,189 | $1,731 | $269.69 | $238.40 - $296.38 |
| Q1 2020 | 27,300 | $8,637 | $303.47 | $262.25 - $374.99 |
| Q3 2019 | 49,281 | $11,474 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 213,640 | $49,964 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 46,577 | $11,010 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 91,566 | $27,554 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 41,180 | $14,549 | $344.30 | $288.13 - $388.67 |
| Q1 2018 | 948 | $260 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 2,273 | $724 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 2,840 | $889 | $296.11 | $269.50 - $330.00 |
| Q1 2017 | 5,314 | $1,453 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 563,390 | $159,766 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 27,759 | $8,689 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 242,003 | $58,521 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 243,912 | $63,495 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 161,416 | $49,450 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 110,486 | $32,241 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 211,786 | $85,549 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 5,402 | $2,281 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 13,076 | $4,439 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 233,109 | $77,115 | $329.72 | $298.31 - $349.00 |
| Q4 2013 | 19,658 | $5,499 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 305,516 | $73,556 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 401,726 | $86,451 | $213.68 | $191.80 - $242.64 |