| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 21 | 21 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2023 | 21 |
| SIMPLEX TRADING, LLC | 13 | 3 | 0.00% | 0.00% | 0.00% | Q4 2017 | Q3 2023 | 20 |
| GROUP ONE TRADING, L.P. | 2 | 1 | 0.00% | 0.00% | 0.00% | Q2 2018 | Q3 2023 | 12 |
This page lists all the filers that currently own MERRIMACK PHARMACEUTICALS IN or have owned MERRIMACK PHARMACEUTICALS IN in the past.