Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 18,394 | $3,237 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 18,017 | $3 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 28,551 | $4 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 27,480 | $4 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 26,292 | $4 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 28,343 | $5 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 28,446 | $7 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 22,187 | $5 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 22,612 | $6 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 23,416 | $6 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 22,983 | $7 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 23,709 | $7 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 32,440 | $9 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 23,035 | $6,150 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 23,356 | $4,763 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 24,997 | $5,264 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 24,077 | $5,776 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 27,225 | $7,704 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 27,710 | $9,595 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 22,090 | $6,179 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 23,093 | $5,654 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 25,268 | $7,168 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 27,076 | $7,244 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 24,748 | $7,830 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 26,571 | $7,884 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 24,355 | $5,670 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 26,034 | $6,088 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 29,939 | $7,077 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 27,210 | $8,188 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 28,305 | $10,000 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 28,023 | $8,133 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 28,104 | $7,695 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 27,960 | $8,907 | $320.80 | $301.81 - $348.84 |