Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 58,819 | $10,352 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 53,390 | $7,479 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 56,076 | $7,043 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 52,294 | $7,156 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 46,368 | $7,091 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 181,550 | $35,192 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 198,676 | $46,057 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 217,738 | $46,951 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 236,451 | $61,186 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 299,051 | $76,859 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 312,875 | $89,122 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 2,556,583 | $90,400 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 293,463 | $81,266 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 305,647 | $81,608 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 307,280 | $62,667 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 293,806 | $61,876 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 218,221 | $52,356 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 234,349 | $66,319 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 217,559 | $75,334 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 212,568 | $59,466 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 182,206 | $44,615 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 192,028 | $54,474 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 179,371 | $47,990 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 163,909 | $51,858 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 158,468 | $47,022 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 145,721 | $33,927 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 138,645 | $32,425 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 150,090 | $35,478 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 139,487 | $41,974 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 42,534 | $15,028 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 55,939 | $16,235 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 16,453 | $4,501 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 59,911 | $19,086 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 57,665 | $18,058 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 53,529 | $14,529 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 51,173 | $13,993 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 45,189 | $12,814 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 38,498 | $12,051 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 44,156 | $10,678 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 41,501 | $10,804 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 34,131 | $10,456 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 45,962 | $13,412 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 57,046 | $23,043 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 62,585 | $26,426 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 2,819 | $957 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 4,985 | $1,649 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 4,162 | $1,312 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 4,065 | $1,243 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 4,105 | $1,148 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 3,947 | $950 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 2,485 | $535 | $213.68 | $191.80 - $242.64 |