Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 119,087 | $20,970 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 141,348 | $19,774 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 242,053 | $30,407 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 207,649 | $28,438 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 121,763 | $18,596 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 131,450 | $25,488 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 117,538 | $27,211 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 146,628 | $31,626 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 123,270 | $31,914 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 154,588 | $39,743 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 187,477 | $53,364 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 258,041 | $71,696 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 276,689 | $76,607 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 337,254 | $89,999 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 258,861 | $52,809 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 144,942 | $30,528 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 104,070 | $24,967 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 106,450 | $30,164 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 120,257 | $41,628 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 160,044 | $44,616 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 197,933 | $48,335 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 229,505 | $64,950 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 211,064 | $55,700 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 297,554 | $94,109 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 360,956 | $107,015 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 375,121 | $87,079 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 323,516 | $76,121 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 251,449 | $59,237 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 156,039 | $46,536 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 235,772 | $83,455 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 159,635 | $46,248 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 183,809 | $50,222 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 131,155 | $42,002 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 259,175 | $81,143 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 199,321 | $54,087 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 240,097 | $65,641 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 233,489 | $67,011 | $296.43 | $268.00 - $329.83 |