| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 12 | 1 | 0.00% | 0.00% | 0.00% | Q1 2016 | Q3 2022 | 22 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 21 | 21 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2023 | 21 |
| GROUP ONE TRADING, L.P. | 6 | 1 | 0.00% | 0.00% | 0.01% | Q2 2013 | Q2 2021 | 16 |
| Citadel Advisors | 10 | 10 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q3 2015 | 10 |
| PEAK6 Group LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2014 | Q3 2014 | 1 |
This page lists all the filers that currently own FORMFACTOR INC or have owned FORMFACTOR INC in the past.