| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q4 2016 | Q3 2017 | 2 |
| GROUP ONE TRADING, L.P. | 1 | 1 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q2 2013 | 1 |
This page lists all the filers that currently own GUIDANCE SOFTWARE INC or have owned GUIDANCE SOFTWARE INC in the past.