| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 7 | 4 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q1 2017 | 11 |
| Citadel Advisors | 3 | 2 | 0.00% | 0.00% | 0.00% | Q2 2014 | Q2 2016 | 5 |
| SIMPLEX TRADING, LLC | 3 | 3 | 0.00% | 0.00% | 0.00% | Q2 2016 | Q4 2016 | 3 |
This page lists all the filers that currently own MAST THERAPEUTICS INC or have owned MAST THERAPEUTICS INC in the past.