Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 339,284 | $59,711 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 918,025 | $128,597 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 793,282 | $99,628 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 765,321 | $104,727 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 686,550 | $104,987 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 856,835 | $166,089 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 57,595 | $13,352 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 56,641 | $12,213 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 70,008 | $18,116 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 108,168 | $27,800 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 170,811 | $48,656 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 241,178 | $67,055 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 695,284 | $192,538 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 669,178 | $178,671 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 793,155 | $161,755 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 820,811 | $172,863 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 213,448 | $51,210 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 176,439 | $49,930 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 36,335 | $12,582 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 25,843 | $7,229 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 128,488 | $31,461 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 341,926 | $96,998 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 492,570 | $131,788 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 567,892 | $179,670 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 709,416 | $210,505 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 694,842 | $161,773 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 472,592 | $110,525 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 311,160 | $73,552 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 426,053 | $128,208 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 352,192 | $124,433 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 352,514 | $102,315 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 278,129 | $76,157 | $310.41 | $259.76 - $370.57 |