| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 11 | 2 | 0.00% | 0.00% | 0.00% | Q1 2015 | Q3 2019 | 15 |
| Citadel Advisors | 4 | 3 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q3 2015 | 7 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 7 | 7 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q1 2020 | 7 |
| GROUP ONE TRADING, L.P. | 3 | 1 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q1 2019 | 4 |
This page lists all the filers that currently own NANOMETRICS INC or have owned NANOMETRICS INC in the past.