| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 6 | 3 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q1 2021 | 18 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 11 | 11 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q1 2021 | 11 |
| SIMPLEX TRADING, LLC | 5 | 1 | 0.00% | 0.00% | 0.00% | Q4 2016 | Q1 2021 | 8 |
| Hudson Bay Capital Management LP | 1 | 1 | 0.00% | 0.00% | 0.00% | Q1 2021 | Q1 2021 | 1 |
This page lists all the filers that currently own GENMARK DIAGNOSTICS INC or have owned GENMARK DIAGNOSTICS INC in the past.