Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 62,695 | $11,034 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 63,289 | $8,866 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 70,217 | $8,819 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 70,069 | $9,588 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 77,581 | $11,864 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 80,774 | $15,657 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 94,494 | $21,906 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 98,088 | $21,151 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 115,468 | $29,880 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 113,349 | $29,132 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 117,309 | $33,415 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 120,420 | $33,480 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 118,640 | $32,854 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 115,661 | $30,881 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 57,407 | $11,707 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 67,690 | $14,256 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 109,260 | $26,214 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 79,503 | $22,499 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 91,867 | $31,811 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 114,301 | $31,975 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 119,615 | $29,289 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 147,265 | $41,776 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 156,530 | $41,879 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 163,536 | $51,739 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 138,758 | $41,174 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 140,965 | $32,820 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 144,574 | $33,811 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 145,270 | $34,339 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 958,459 | $288,420 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 939,168 | $331,818 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 112,936 | $32,778 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 124,329 | $34,044 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 502,226 | $159,994 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 474,887 | $148,516 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 846,152 | $229,612 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 853,996 | $233,500 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 876,591 | $248,584 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 822,686 | $257,525 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 603,894 | $146,034 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 563,747 | $146,755 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 567,567 | $173,873 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 572,428 | $167,040 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 577,208 | $233,158 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 118,582 | $50,070 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 115,612 | $39,244 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 116,487 | $38,535 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 121,163 | $38,204 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 118,734 | $36,317 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 99,840 | $27,930 | $258.65 | $221.07 - $298.82 |
| Q3 2013 | 100,739 | $24,254 | $223.81 | $203.55 - $248.95 |
| Q2 2013 | 107,220 | $23,074 | $213.68 | $191.80 - $242.64 |