| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 10 | 5 | 0.00% | 0.00% | 0.00% | Q2 2016 | Q1 2022 | 22 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 15 | 15 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q1 2022 | 15 |
| GROUP ONE TRADING, L.P. | 7 | 1 | 0.00% | 0.00% | 0.00% | Q1 2017 | Q1 2022 | 11 |
| SABBY MANAGEMENT, LLC | 2 | 2 | 0.04% | 0.04% | 0.04% | Q4 2021 | Q1 2022 | 2 |
This page lists all the filers that currently own ION GEOPHYSICAL CORP or have owned ION GEOPHYSICAL CORP in the past.