Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 798,774 | $140,576 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 2,039 | $286 | $135.17 | $121.05 - $150.28 |
| Q1 2025 | 12,159 | $1,664 | $142.96 | $128.51 - $157.09 |
| Q4 2023 | 13,235 | $3,425 | $245.62 | $220.86 - $269.43 |
| Q2 2023 | 125,980 | $35,885 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 269,438 | $74,912 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 332,065 | $91,955 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 144,032 | $38,457 | $212.38 | $193.65 - $283.44 |
| Q2 2021 | 85,613 | $29,645 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 17,725 | $4,959 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 3,959 | $969 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 17 | $5 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 3,867 | $1,035 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 163,090 | $51,598 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 138,845 | $41,199 | $277.46 | $219.70 - $318.00 |
| Q2 2019 | 42 | $10 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 2,021 | $478 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 217,131 | $65,339 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 297,536 | $105,122 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 12,801 | $3,715 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 14,421 | $3,949 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 13,329 | $4,246 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 7,792 | $2,440 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 6,542 | $1,775 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 13,403 | $3,665 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 536,029 | $152,007 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 449,722 | $140,776 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 588,381 | $142,283 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 707,903 | $184,282 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 586,352 | $179,629 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 468,918 | $136,835 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 871,995 | $352,234 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 852,902 | $360,129 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 600,510 | $203,843 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 429,700 | $142,149 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 473,599 | $149,331 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 507,819 | $155,327 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 579,630 | $162,048 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 325,895 | $78,463 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 261,054 | $56,178 | $213.68 | $191.80 - $242.64 |