| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 27 | 27 | 0.00% | 0.00% | 0.01% | Q1 2015 | Q3 2021 | 27 |
| GROUP ONE TRADING, L.P. | 8 | 3 | 0.00% | 0.00% | 0.01% | Q1 2015 | Q2 2021 | 21 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 12 | 12 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q2 2021 | 12 |
| Citadel Advisors | 9 | 9 | 0.00% | 0.00% | 0.00% | Q2 2014 | Q2 2016 | 9 |
| Hudson Bay Capital Management LP | 1 | 1 | 0.14% | 0.14% | 0.14% | Q1 2018 | Q1 2018 | 1 |
| Graticule Asia Macro Advisors LLC | 1 | 1 | 0.22% | 0.22% | 0.22% | Q3 2018 | Q3 2018 | 1 |
| JPMORGAN CHASE & CO | 1 | 1 | 0.00% | 0.00% | 0.00% | Q4 2018 | Q4 2018 | 1 |
| TWO SIGMA SECURITIES, LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2019 | Q3 2019 | 1 |
This page lists all the filers that currently own PROOFPOINT INC or have owned PROOFPOINT INC in the past.