Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 5,469 | $962 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 6,551 | $918 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 5,587 | $702 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 6,680 | $914 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 23,840 | $3,646 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 247,535 | $47,982 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 219,998 | $51,000 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 46,200 | $9,962 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 4,510 | $1,167 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 4,221 | $1,085 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 12,250 | $3,489 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 12,236 | $3,402 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 12,060 | $3,340 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 13,821 | $3,690 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 15,199 | $3,100 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 20,716 | $4,363 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 36,058 | $8,651 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 67,920 | $19,221 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 68,221 | $23,623 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 93,400 | $26,129 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 89,393 | $21,889 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 113,413 | $32,173 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 113,199 | $30,286 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 152,291 | $48,182 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 135,817 | $40,301 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 139,586 | $32,498 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 159,058 | $37,199 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 164,954 | $38,992 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 158,964 | $47,835 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 161,158 | $56,939 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 159,238 | $46,217 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 119,200 | $32,639 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 116,047 | $36,969 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 112,726 | $35,297 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 115,468 | $31,333 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 108,151 | $29,571 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 116,274 | $32,973 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 186,548 | $58,395 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 187,628 | $45,372 | $263.54 | $223.02 - $292.69 |