| 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 | 6 | 1 | 0.00% | 0.00% | 0.00% | Q4 2016 | Q2 2022 | 15 |
This page lists all the filers that currently own AMPCO-PITTSBURGH CORP or have owned AMPCO-PITTSBURGH CORP in the past.