| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| Citadel Advisors | 11 | 11 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q4 2015 | 11 |
| GROUP ONE TRADING, L.P. | 7 | 1 | 0.00% | 0.01% | 0.02% | Q2 2013 | Q2 2016 | 9 |
| SIMPLEX TRADING, LLC | 8 | 8 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q3 2016 | 8 |
| Timber Hill LLC | 7 | 7 | 0.00% | 0.01% | 0.01% | Q2 2013 | Q4 2014 | 7 |
| PEAK6 Group LLC | 1 | 1 | 0.01% | 0.01% | 0.01% | Q3 2014 | Q3 2014 | 1 |
This page lists all the filers that currently own QUESTAR CORP or have owned QUESTAR CORP in the past.