Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 44,300 | $7,796 | $163.37 | $138.00 - $185.17 |
| Q4 2018 | 48,900 | $14,715 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 48,900 | $17,277 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 48,900 | $14,193 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 67,000 | $18,346 | $310.41 | $259.76 - $370.57 |
| Q1 2017 | 47,000 | $12,851 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 47,000 | $13,328 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 47,000 | $11,366 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 47,000 | $11,366 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 47,000 | $12,235 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 47,000 | $14,398 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 47,000 | $13,715 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 47,000 | $18,985 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 47,000 | $19,845 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 47,000 | $15,954 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 47,000 | $15,548 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 47,000 | $14,820 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 47,000 | $14,376 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 47,000 | $13,148 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 30,000 | $7,223 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 30,000 | $6,456 | $213.68 | $191.80 - $242.64 |