| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 36 | 36 | 0.00% | 0.00% | 0.01% | Q4 2014 | Q3 2023 | 36 |
| GROUP ONE TRADING, L.P. | 15 | 3 | 0.00% | 0.01% | 0.04% | Q1 2014 | Q3 2023 | 33 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 21 | 21 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2023 | 21 |
| Timber Hill LLC | 17 | 17 | 0.00% | 0.01% | 0.02% | Q2 2013 | Q2 2017 | 17 |
| Citadel Advisors | 13 | 13 | 0.00% | 0.00% | 0.01% | Q2 2013 | Q2 2016 | 13 |
| JANE STREET GROUP, LLC | 6 | 6 | 0.00% | 0.00% | 0.00% | Q2 2022 | Q3 2023 | 6 |
| JPMORGAN CHASE & CO | 2 | 1 | 0.00% | 0.00% | 0.00% | Q4 2015 | Q1 2020 | 4 |
| PURA VIDA INVESTMENTS, LLC | 1 | 1 | 0.20% | 0.51% | 0.82% | Q2 2021 | Q1 2022 | 2 |
| Tamarack Advisers, LP | 1 | 1 | 0.02% | 0.02% | 0.02% | Q2 2017 | Q2 2017 | 1 |
| KNIGHT CAPITAL GROUP LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q2 2013 | 1 |
| TWO SIGMA SECURITIES, LLC | 1 | 1 | 0.01% | 0.01% | 0.01% | Q3 2019 | Q3 2019 | 1 |
| PEAK6 Group LLC | 1 | 1 | 0.01% | 0.01% | 0.01% | Q3 2014 | Q3 2014 | 1 |
| SG Americas Securities, LLC | 1 | 1 | 0.02% | 0.02% | 0.02% | Q1 2020 | Q1 2020 | 1 |
| Virtu KCG Holdings LLC | 1 | 1 | 0.01% | 0.01% | 0.01% | Q3 2013 | Q3 2013 | 1 |
| Maven Securities LTD | 1 | 1 | 0.01% | 0.01% | 0.01% | Q3 2023 | Q3 2023 | 1 |
This page lists all the filers that currently own QUEST DIAGNOSTICS INC or have owned QUEST DIAGNOSTICS INC in the past.