Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 66,970 | $11,786 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 66,970 | $9,381 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 59,680 | $7,495 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 60,070 | $8,220 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 60,070 | $9,186 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 60,070 | $11,644 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 60,220 | $13,960 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 59,680 | $12,869 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 48,133 | $12,455 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 48,145 | $12,374 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 28,325 | $8,068 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 28,232 | $7,849 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 35,410 | $9,806 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 39,140 | $10,450 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 56,970 | $11,618 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 67,730 | $14,264 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 72,075 | $17,292 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 61,303 | $17,348 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 45,260 | $15,672 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 46,260 | $12,941 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 37,260 | $9,123 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 37,260 | $10,570 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 37,260 | $9,969 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 30,440 | $9,631 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 30,440 | $9,032 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 39,220 | $9,131 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 53,920 | $12,610 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 54,053 | $12,777 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 54,251 | $16,325 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 51,796 | $18,299 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 59,096 | $17,152 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 59,065 | $16,173 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 62,214 | $19,820 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 77,683 | $24,324 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 86,202 | $23,392 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 67,582 | $18,478 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 67,605 | $19,171 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 67,481 | $21,124 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 76,552 | $18,512 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 76,039 | $19,794 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 80,308 | $24,616 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 73,080 | $21,325 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 59,500 | $24,034 | $401.33 | $368.88 - $432.88 |