| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 7 | 2 | 0.00% | 0.00% | 0.00% | Q2 2014 | Q1 2019 | 14 |
| SIMPLEX TRADING, LLC | 8 | 4 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q4 2018 | 12 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 7 | 7 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q1 2020 | 7 |
| Citadel Advisors | 3 | 3 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q2 2015 | 3 |
This page lists all the filers that currently own HIGHPOWER INTL INC or have owned HIGHPOWER INTL INC in the past.