Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 221,860 | $39,045 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 253,151 | $35,461 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 267,740 | $33,625 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 200,520 | $27,439 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 241,008 | $36,855 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 300,000 | $58,152 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 195,000 | $45,205 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 225,000 | $48,517 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 135,000 | $34,934 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 82,500 | $21,203 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 57,500 | $16,379 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 109,306 | $30,390 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 52,500 | $14,538 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 47,500 | $12,683 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 25,000 | $5,099 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 15,000 | $3,159 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 44,000 | $10,556 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 20,000 | $5,660 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 15,000 | $5,194 | $302.94 | $257.03 - $468.55 |
| Q4 2020 | 20,000 | $4,897 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 50,000 | $14,184 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 47,500 | $12,708 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 10,000 | $3,164 | $303.47 | $262.25 - $374.99 |
| Q2 2019 | 7,500 | $1,754 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 33,800 | $7,990 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 14,700 | $4,424 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 30,000 | $10,599 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 30,000 | $8,707 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 40,000 | $10,953 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 15,000 | $4,779 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 15,000 | $4,697 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 35,000 | $9,498 | $264.42 | $244.28 - $291.90 |
| Q4 2016 | 71,402 | $20,248 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 108,309 | $33,904 | $296.18 | $240.07 - $333.65 |