| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 6 | 5 | 0.00% | 0.01% | 0.01% | Q2 2013 | Q1 2016 | 11 |
| Citadel Advisors | 9 | 9 | 0.00% | 0.00% | 0.00% | Q1 2014 | Q1 2016 | 9 |
| SIMPLEX TRADING, LLC | 6 | 6 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q1 2016 | 6 |
| Eidelman Virant Capital | 2 | 1 | 0.00% | 0.01% | 0.01% | Q1 2016 | Q1 2017 | 3 |
| CSS LLC/IL | 1 | 1 | 0.02% | 0.02% | 0.02% | Q4 2013 | Q4 2013 | 1 |
This page lists all the filers that currently own OCEAN RIG UDW INC or have owned OCEAN RIG UDW INC in the past.