Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 94,738 | $16,673 | $163.37 | $138.00 - $185.17 |
| Q3 2025 | 82,738 | $11,590 | $135.17 | $121.05 - $150.28 |
| Q2 2025 | 82,738 | $10,391 | $124.60 | $110.04 - $137.32 |
| Q1 2025 | 22,738 | $3,111 | $142.96 | $128.51 - $157.09 |
| Q4 2024 | 22,738 | $3,477 | $168.67 | $145.07 - $195.00 |
| Q3 2024 | 24,455 | $4,740 | $209.21 | $188.78 - $238.00 |
| Q2 2024 | 47,412 | $10,991 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 70,646 | $15,233 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 46,346 | $11,993 | $245.62 | $220.86 - $269.43 |
| Q3 2023 | 25,846 | $6,643 | $267.47 | $251.85 - $287.60 |
| Q2 2023 | 23,846 | $6,793 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 33,516 | $9,318 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 7,516 | $2,081 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 55,500 | $14,819 | $212.38 | $193.65 - $283.44 |
| Q4 2021 | 13,000 | $3,119 | $257.12 | $221.72 - $290.76 |
| Q2 2021 | 23,995 | $8,309 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 6,800 | $1,902 | $269.69 | $238.40 - $296.38 |
| Q1 2019 | 30,000 | $7,091 | $314.89 | $216.12 - $344.00 |
| Q2 2018 | 50,000 | $14,512 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 65,000 | $17,798 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 74,200 | $23,638 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 105,000 | $32,878 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 90,000 | $24,422 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 75,000 | $20,507 | $282.75 | $260.50 - $301.42 |
| Q3 2016 | 50,000 | $15,652 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 50,500 | $12,212 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 118,850 | $30,939 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 123,850 | $37,941 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 85,000 | $24,804 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 60,730 | $24,531 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 10,000 | $4,222 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 40,000 | $13,578 | $323.51 | $290.85 - $361.93 |
| Q2 2014 | 22,000 | $6,937 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 17,000 | $5,200 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 12,000 | $3,357 | $258.65 | $221.07 - $298.82 |