Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 139,878 | $24,617 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 138,865 | $19,452 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 156,755 | $19,687 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 146,813 | $19,992 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 543,410 | $82,030 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 568,510 | $110,123 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 535,177 | $124,065 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 455,864 | $98,298 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 437,075 | $113,102 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 129,543 | $33,294 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 122,879 | $35,002 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 114,507 | $31,836 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 104,333 | $28,892 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 97,736 | $26,095 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 59,138 | $12,148 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 53,807 | $11,364 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 65,045 | $15,605 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 66,981 | $19,109 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 64,664 | $22,406 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 68,115 | $19,064 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 60,609 | $14,841 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 75,166 | $21,322 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 87,106 | $23,305 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 110,762 | $35,043 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 122,220 | $36,266 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 128,787 | $29,997 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 218,507 | $51,106 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 212,117 | $50,139 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 138,135 | $40,668 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 124,967 | $44,158 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 116,870 | $33,924 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 106,358 | $29,123 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 108,429 | $34,547 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 113,620 | $35,576 | $296.11 | $269.50 - $330.00 |