| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 3 | 1 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q1 2017 | 7 |
| GROUP ONE TRADING, L.P. | 3 | 3 | 0.00% | 0.00% | 0.00% | Q2 2015 | Q1 2017 | 6 |
| Citadel Advisors | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2015 | Q3 2015 | 1 |
This page lists all the filers that currently own QUANTUM CORP or have owned QUANTUM CORP in the past.