| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 17 | 17 | 0.00% | 0.03% | 0.08% | Q2 2013 | Q2 2017 | 17 |
| Citadel Advisors | 13 | 13 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q2 2016 | 13 |
| SIMPLEX TRADING, LLC | 9 | 2 | 0.00% | 0.00% | 0.01% | Q4 2014 | Q3 2017 | 11 |
| Timber Hill LLC | 4 | 2 | 0.00% | 0.00% | 0.01% | Q2 2013 | Q4 2016 | 9 |
| PEAK6 Group LLC | 1 | 1 | 0.02% | 0.02% | 0.02% | Q3 2014 | Q3 2014 | 1 |
| ADVENT CAPITAL MANAGEMENT /DE/ | 1 | 1 | 0.00% | 0.00% | 0.00% | Q4 2016 | Q4 2016 | 1 |
| CR Intrinsic Investors, LLC | 1 | 1 | 0.30% | 0.30% | 0.30% | Q2 2013 | Q2 2013 | 1 |
This page lists all the filers that currently own WEBMD HEALTH CORP or have owned WEBMD HEALTH CORP in the past.