Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 9,873 | $1,738 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 10,124 | $1,418 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 12,625 | $1,586 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 61,393 | $8,401 | $142.96 | $128.51 - $157.09 |
| Q4 2021 | 1,588 | $381 | $257.12 | $221.72 - $290.76 |
| Q1 2021 | 170,620 | $47,731 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 22,596 | $5,533 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 22,737 | $6,450 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 2,175 | $582 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 299,320 | $94,699 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 358,313 | $106,322 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 308,839 | $71,904 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 175,817 | $41,118 | $230.90 | $219.20 - $245.35 |
| Q2 2018 | 1,732 | $503 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 33,124 | $9,070 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 9,774 | $3,114 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 14,496 | $4,539 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 29,079 | $7,891 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 51,467 | $14,072 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 63,740 | $18,075 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 129,093 | $40,410 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 94,473 | $22,845 | $263.54 | $223.02 - $292.69 |
| Q3 2015 | 19,504 | $5,691 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 52,508 | $21,210 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 110,683 | $46,735 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 97,217 | $33,000 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 847 | $280 | $329.72 | $298.31 - $349.00 |
| Q4 2013 | 7,380 | $2,063 | $258.65 | $221.07 - $298.82 |