| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 2 | 1 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q1 2016 | 5 |
| SIMPLEX TRADING, LLC | 3 | 3 | 0.00% | 0.00% | 0.00% | Q3 2015 | Q1 2016 | 3 |
| PEAK6 Group LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2014 | Q3 2014 | 1 |
This page lists all the filers that currently own DERMA SCIENCES INC or have owned DERMA SCIENCES INC in the past.