Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 45,349 | $7,981 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 380,791 | $53,341 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 624,371 | $78,415 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 214,780 | $29,390 | $142.96 | $128.51 - $157.09 |
| Q3 2023 | 196,954 | $51 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 295,843 | $84 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 290,740 | $81 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 446,799 | $124 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 630,496 | $168,342 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 590,102 | $120,345 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 988,077 | $208,089 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 965,862 | $231,730 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 274,119 | $77,573 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 186,817 | $64,689 | $302.94 | $257.03 - $468.55 |
| Q4 2020 | 316,606 | $77,524 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 298,305 | $84,623 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 710,599 | $190,121 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 1,446,459 | $457,631 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 2,420,191 | $718,143 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 2,662,355 | $619,849 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 2,494,757 | $583,449 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 1,716,590 | $405,768 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 1,524,089 | $458,629 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 1,429,862 | $505,184 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 1,806,787 | $524,402 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 1,143,854 | $313,210 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 49,000 | $15,610 | $320.80 | $301.81 - $348.84 |
| Q2 2017 | 159,300 | $43,228 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 5,100 | $1,394 | $282.75 | $260.50 - $301.42 |