| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 3 | 1 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q3 2016 | 4 |
This page lists all the filers that currently own ALPHA PRO TECH LTD or have owned ALPHA PRO TECH LTD in the past.