Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 17,187 | $3 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 18,182 | $3 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 19,059 | $2 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 19,719 | $3 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 19,179 | $3 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 24,870 | $5 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 29,770 | $7 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 33,640 | $7 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 38,550 | $10 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 47,175 | $12 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 47,740 | $14 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 48,664 | $14 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 48,421 | $13 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 47,579 | $12,702 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 49,760 | $10,147 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 53,995 | $11,370 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 57,835 | $13,875 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 65,920 | $18,654 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 69,534 | $24,077 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 59,966 | $16,774 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 64,664 | $15,833 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 90,946 | $25,798 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 59,016 | $15,788 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 32,329 | $10,227 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 30,682 | $9,103 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 33,762 | $7,860 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 29,129 | $6,809 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 30,001 | $7,090 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 31,186 | $9,382 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 30,994 | $10,949 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 32,458 | $9,418 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 26,358 | $7,215 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 22,248 | $7,086 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 1,840 | $576 | $296.11 | $269.50 - $330.00 |