| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 9 | 9 | 0.00% | 0.00% | 0.01% | Q2 2013 | Q2 2015 | 9 |
| Citadel Advisors | 4 | 3 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q1 2015 | 7 |
| SABBY MANAGEMENT, LLC | 1 | 1 | 0.01% | 0.02% | 0.02% | Q2 2013 | Q4 2013 | 2 |
This page lists all the filers that currently own TARGACEPT INC or have owned TARGACEPT INC in the past.