Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 6,017 | $1,059 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 2,806 | $393 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 431 | $54 | $124.60 | $110.04 - $137.32 |
| Q1 2022 | 745 | $157 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 12,725 | $3,053 | $257.12 | $221.72 - $290.76 |
| Q1 2021 | 6,395 | $1,789 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 7,045 | $1,725 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 76,029 | $21,568 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 74,934 | $20,049 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 175,000 | $55,367 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 115,000 | $34,124 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 78,700 | $18,323 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 75,000 | $17,540 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 190,600 | $45,054 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 190,500 | $57,325 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 99,461 | $35,141 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 236 | $68 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 20,000 | $5,476 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 20,000 | $6,371 | $320.80 | $301.81 - $348.84 |