Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 23,300 | $4 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 26,600 | $4 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 26,600 | $3 | $124.60 | $110.04 - $137.32 |
| Q4 2023 | 67,208 | $17 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 69,808 | $18 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 68,808 | $20 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 73,408 | $20 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 70,108 | $19 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 81,108 | $21,656 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 86,308 | $17,602 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 108,508 | $22,852 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 116,208 | $27,881 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 113,408 | $32,093 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 111,708 | $32,617 | $302.94 | $257.03 - $468.55 |
| Q4 2020 | 152,408 | $37,318 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 151,308 | $42,923 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 148,408 | $39,707 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 168,108 | $53,186 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 178,908 | $53,087 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 174,208 | $40,559 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 100,673 | $23,544 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 115,073 | $27,201 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 113,973 | $30,002 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 33,665 | $11,894 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 33,665 | $9,771 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 33,265 | $9,109 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 32,865 | $8,719 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 35,265 | $11,042 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 35,865 | $9,732 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 5,802 | $1,483 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 5,697 | $1,532 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 5,637 | $1,765 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 5,555 | $1,209 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 5,570 | $1,272 | $264.15 | $242.07 - $301.02 |