Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 607,953 | $106,994 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 1,234,149 | $172,880 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 831,905 | $104,479 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 786,219 | $107,586 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 45,829 | $7,008 | $168.67 | $145.07 - $195.00 |
| Q2 2024 | 394,887 | $91,543 | $217.32 | $189.44 - $237.54 |
| Q4 2023 | 317,302 | $82,108 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 230,411 | $59,218 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 59,988 | $17,088 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 239,395 | $66,559 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 51,383 | $14,229 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 176,165 | $47,036 | $212.38 | $193.65 - $283.44 |
| Q2 2022 | 23,306 | $4,753 | $204.43 | $187.16 - $225.50 |
| Q1 2022 | 168,176 | $35,418 | $217.46 | $192.67 - $249.00 |
| Q4 2021 | 81,244 | $19,492 | $257.12 | $221.72 - $290.76 |
| Q3 2021 | 46,535 | $13,169 | $327.75 | $282.64 - $372.12 |
| Q2 2021 | 138,279 | $47,882 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 89,620 | $25,071 | $269.69 | $238.40 - $296.38 |
| Q4 2020 | 35,135 | $8,603 | $259.08 | $223.25 - $363.92 |
| Q3 2020 | 153,258 | $43,476 | $278.91 | $261.87 - $312.00 |
| Q4 2019 | 129,669 | $38,477 | $277.46 | $219.70 - $318.00 |
| Q3 2019 | 13,796 | $3,212 | $232.85 | $215.78 - $246.99 |
| Q2 2019 | 120,457 | $28,171 | $230.90 | $219.20 - $245.35 |
| Q1 2019 | 23,423 | $5,537 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 106,566 | $32,068 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 6,527 | $2,306 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 45,705 | $13,265 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 440,160 | $120,525 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 547,609 | $174,452 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 162,479 | $50,875 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 261,645 | $71,000 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 46,616 | $12,746 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 94,826 | $26,891 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 448,225 | $140,308 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 243,652 | $58,920 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 201,967 | $52,576 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 176,954 | $54,210 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 212,801 | $62,097 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 275,246 | $111,183 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 26,910 | $11,362 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 50,393 | $17,117 | $323.51 | $290.85 - $361.93 |