| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 13 | 2 | 0.00% | 0.00% | 0.01% | Q2 2013 | Q3 2023 | 34 |
| SIMPLEX TRADING, LLC | 34 | 34 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q1 2023 | 34 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 21 | 21 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2023 | 21 |
| Citadel Advisors | 6 | 4 | 0.00% | 0.00% | 0.00% | Q4 2013 | Q2 2016 | 10 |
| SUMMIT SECURITIES GROUP LLC | 1 | 1 | 0.05% | 0.05% | 0.05% | Q4 2018 | Q4 2018 | 1 |
This page lists all the filers that currently own ENERGY RECOVERY INC or have owned ENERGY RECOVERY INC in the past.