Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 3,568 | $628 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 3,414 | $478 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 3,009 | $378 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 3,259 | $446 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 4,179 | $639 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 3,756 | $728 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 2,414 | $560 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 2,535 | $547 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 2,369 | $613 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 2,213 | $569 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 1,597 | $455 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 1,183 | $329 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 1,031 | $265 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 873 | $233 | $212.38 | $193.65 - $283.44 |
| Q1 2022 | 1,143 | $241 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 1,113 | $267 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 1,241 | $351 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 1,157 | $401 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 1,171 | $328 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 1,118 | $274 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 1,217 | $345 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 1,074 | $287 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 1,020 | $323 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 847 | $251 | $277.46 | $219.70 - $318.00 |
| Q1 2019 | 874 | $207 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 874 | $263 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 922 | $326 | $344.30 | $288.13 - $388.67 |
| Q1 2018 | 912 | $250 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 840 | $268 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 872 | $273 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 836 | $227 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 846 | $231 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 816 | $231 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 836 | $262 | $296.18 | $240.07 - $333.65 |
| Q1 2016 | 830 | $216 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 1,306 | $400 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 880 | $257 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 876 | $354 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 876 | $370 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 866 | $294 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 836 | $277 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 836 | $264 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 836 | $256 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 836 | $234 | $258.65 | $221.07 - $298.82 |