| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 21 | 21 | 0.00% | 0.01% | 0.05% | Q4 2013 | Q4 2018 | 21 |
| SIMPLEX TRADING, LLC | 5 | 4 | 0.00% | 0.00% | 0.02% | Q4 2014 | Q2 2018 | 13 |
| Citadel Advisors | 9 | 9 | 0.00% | 0.00% | 0.00% | Q2 2014 | Q2 2016 | 9 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 7 | 7 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q1 2020 | 7 |
| SABBY MANAGEMENT, LLC | 3 | 1 | 0.00% | 0.02% | 0.08% | Q1 2014 | Q4 2018 | 4 |
This page lists all the filers that currently own OPHTHOTECH CORP or have owned OPHTHOTECH CORP in the past.