Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 3,178 | $559 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 3,143 | $440 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 2,531 | $318 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 2,500 | $342 | $142.96 | $128.51 - $157.09 |
| Q2 2023 | 1,240 | $353 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 1,230 | $342 | $276.70 | $254.80 - $295.90 |
| Q1 2020 | 722 | $228 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 1,466 | $435 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 1,529 | $356 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 1,224 | $286 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 1,537 | $363 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 8,690 | $2,615 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 5,523 | $1,951 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,885 | $547 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 2,237 | $613 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 1,802 | $574 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 2,000 | $626 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 2,109 | $572 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 1,900 | $519 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 1,723 | $489 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 1,836 | $575 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 2,064 | $499 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 1,860 | $484 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 1,684 | $516 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 1,856 | $5,416 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 1,346 | $544 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 1,316 | $556 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 1,646 | $559 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 1,993 | $659 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 1,787 | $563 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 1,730 | $529 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 2,014 | $630 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 1,034 | $249 | $223.81 | $203.55 - $248.95 |