Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 319,544 | $56,237 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 307,997 | $43,144 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 244,332 | $30,686 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 120,000 | $16,421 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 104,717 | $16,013 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 196,002 | $37,993 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 790,605 | $183,278 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 702,412 | $151,461 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 656,502 | $169,883 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 63,344 | $16,280 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 63,986 | $18,226 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 63,887 | $17,763 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 55,023 | $15,237 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 52,276 | $13,958 | $212.38 | $193.65 - $283.44 |
| Q1 2022 | 68,291 | $14,382 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 72,666 | $17,434 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 74,400 | $21,054 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 76,803 | $26,594 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 93,837 | $26,251 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 79,680 | $19,511 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 1,100 | $312 | $278.91 | $261.87 - $312.00 |
| Q1 2020 | 37,802 | $11,960 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 36,137 | $10,722 | $277.46 | $219.70 - $318.00 |
| Q4 2018 | 201,969 | $60,777 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 200,941 | $70,995 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 207,125 | $60,116 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 199,513 | $54,630 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 198,671 | $63,291 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 246,267 | $77,111 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 278,129 | $75,473 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 271,984 | $74,366 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 300,072 | $85,094 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 217,162 | $67,978 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 228,645 | $55,292 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 184,049 | $47,912 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 184,417 | $56,497 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 486,748 | $142,038 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 290,796 | $117,465 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 199,784 | $84,357 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 138,390 | $46,977 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 78,827 | $26,077 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 100,761 | $31,771 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 106,552 | $32,591 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 53,918 | $15,084 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 54,888 | $13,215 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 39,488 | $8,498 | $213.68 | $191.80 - $242.64 |