Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 12,674 | $2,230 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 12,930 | $1,811 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 12,930 | $1,624 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 16,080 | $2,200 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 19,609 | $2,999 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 23,610 | $4,577 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 24,661 | $5,717 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 26,254 | $5,661 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 27,626 | $7,149 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 28,752 | $7,390 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 29,709 | $8,463 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 30,354 | $8,439 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 31,714 | $8,782 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 37,968 | $10,137 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 40,939 | $8,349 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 43,096 | $9,076 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 72,419 | $17,375 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 78,968 | $22,347 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 82,745 | $28,652 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 81,822 | $22,890 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 77,001 | $18,854 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 80,380 | $22,802 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 69,094 | $18,486 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 53,976 | $17,077 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 54,951 | $16,306 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 2,560 | $596 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 2,190 | $512 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 1,740 | $411 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 2,455 | $739 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 2,705 | $956 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 2,731 | $793 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 2,705 | $741 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 2,440 | $777 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 2,559 | $801 | $296.11 | $269.50 - $330.00 |