Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 33,479 | $5,892 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 33,479 | $4,690 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 59,115 | $7,424 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 59,115 | $8,089 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 59,115 | $9,040 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 63,933 | $12,393 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 63,933 | $14,821 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 43,849 | $9,455 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 43,849 | $11,347 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 43,849 | $11,270 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 43,849 | $12,490 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 45,645 | $12,691 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 45,645 | $12,640 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 45,645 | $12,187 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 70,499 | $14,378 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 103,633 | $21,825 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 104,492 | $25,070 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 95,283 | $26,964 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 82,152 | $28,447 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 100,764 | $28,189 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 100,764 | $24,673 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 82,082 | $23,285 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 82,402 | $22,047 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 74,466 | $23,560 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 128,961 | $38,267 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 141,807 | $33,016 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 125,819 | $29,425 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 97,940 | $23,151 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 172,284 | $51,844 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 195,164 | $68,953 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 218,819 | $63,510 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 234,555 | $64,226 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 243,684 | $77,630 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 232,061 | $72,663 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 211,751 | $57,897 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 211,751 | $57,897 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 215,239 | $61,037 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 271,384 | $84,951 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 281,958 | $68,183 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 284,958 | $74,180 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 267,824 | $82,048 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 206,889 | $60,372 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 206,789 | $83,530 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 231,722 | $97,842 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 232,813 | $79,028 | $323.51 | $290.85 - $361.93 |