| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| Citadel Advisors | 11 | 1 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q2 2016 | 12 |
| GROUP ONE TRADING, L.P. | 5 | 3 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q2 2016 | 8 |
| SIMPLEX TRADING, LLC | 4 | 2 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q2 2016 | 6 |
| SABBY MANAGEMENT, LLC | 2 | 2 | 0.00% | 0.01% | 0.01% | Q1 2015 | Q2 2015 | 2 |
This page lists all the filers that currently own XENOPORT INC or have owned XENOPORT INC in the past.