Ticker: BIIB CUSIP: 09062X103 Class: COM
Note: Option positions (PUT/CALL) are excluded.
| Period | Shares | Value ($000) | Average Close | Price Range |
|---|---|---|---|---|
| Q4 2025 | 20,000 | $4 | $163.37 | $138.00 - $185.17 |
| Q2 2024 | 30,000 | $7 | $217.32 | $189.44 - $237.54 |
| Q1 2024 | 10,034 | $2 | $234.20 | $211.02 - $268.30 |
| Q4 2023 | 25,000 | $6 | $245.62 | $220.86 - $269.43 |
| Q2 2023 | 10,000 | $3 | $297.86 | $273.39 - $319.76 |
| Q1 2023 | 10,000 | $3 | $276.70 | $254.80 - $295.90 |
| Q4 2022 | 10,000 | $3 | $282.44 | $250.31 - $311.88 |
| Q3 2022 | 10,000 | $2,670 | $212.38 | $193.65 - $283.44 |
| Q2 2021 | 20,000 | $6,925 | $302.94 | $257.03 - $468.55 |
| Q1 2021 | 12,500 | $3,497 | $269.69 | $238.40 - $296.38 |
| Q3 2020 | 12,000 | $3,404 | $278.91 | $261.87 - $312.00 |
| Q2 2020 | 15,000 | $4,013 | $300.59 | $257.60 - $350.24 |
| Q1 2020 | 20,000 | $6,328 | $303.47 | $262.25 - $374.99 |
| Q4 2019 | 20,000 | $5,935 | $277.46 | $219.70 - $318.00 |
| Q1 2019 | 15,000 | $3,546 | $314.89 | $216.12 - $344.00 |
| Q4 2018 | 20,000 | $6,018 | $319.14 | $278.46 - $358.41 |
| Q3 2018 | 17,500 | $6,183 | $344.30 | $288.13 - $388.67 |
| Q2 2018 | 22,500 | $6,530 | $281.15 | $249.17 - $310.91 |
| Q1 2018 | 15,000 | $4,107 | $310.41 | $259.76 - $370.57 |
| Q4 2017 | 20,000 | $6,371 | $320.80 | $301.81 - $348.84 |
| Q3 2017 | 22,500 | $7,045 | $296.11 | $269.50 - $330.00 |
| Q2 2017 | 20,000 | $5,427 | $264.42 | $244.28 - $291.90 |
| Q1 2017 | 15,000 | $4,101 | $282.75 | $260.50 - $301.42 |
| Q4 2016 | 20,000 | $5,672 | $296.43 | $268.00 - $329.83 |
| Q3 2016 | 20,000 | $6,261 | $296.18 | $240.07 - $333.65 |
| Q2 2016 | 20,000 | $4,836 | $263.54 | $223.02 - $292.69 |
| Q1 2016 | 15,000 | $3,905 | $264.15 | $242.07 - $301.02 |
| Q4 2015 | 12,500 | $3,829 | $287.35 | $254.00 - $311.65 |
| Q3 2015 | 20,000 | $5,836 | $330.23 | $265.00 - $412.24 |
| Q2 2015 | 24,800 | $10,018 | $401.33 | $368.88 - $432.88 |
| Q1 2015 | 17,500 | $7,389 | $394.14 | $334.40 - $480.18 |
| Q4 2014 | 22,534 | $7,649 | $323.51 | $290.85 - $361.93 |
| Q3 2014 | 15,000 | $4,962 | $329.72 | $298.31 - $349.00 |
| Q2 2014 | 10,000 | $3,153 | $300.97 | $272.02 - $322.25 |
| Q1 2014 | 7,000 | $2,141 | $317.43 | $270.62 - $358.89 |
| Q4 2013 | 10,000 | $2,796 | $258.65 | $221.07 - $298.82 |