| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 20 | 20 | 0.00% | 0.00% | 0.01% | Q1 2015 | Q4 2019 | 20 |
| GROUP ONE TRADING, L.P. | 13 | 1 | 0.00% | 0.05% | 0.21% | Q2 2013 | Q4 2019 | 14 |
| Citadel Advisors | 13 | 13 | 0.00% | 0.01% | 0.02% | Q2 2013 | Q2 2016 | 13 |
| Timber Hill LLC | 9 | 1 | 0.00% | 0.00% | 0.02% | Q2 2013 | Q1 2017 | 13 |
| SG Americas Securities, LLC | 4 | 2 | 0.00% | 0.00% | 0.02% | Q1 2014 | Q4 2019 | 12 |
| Virtu KCG Holdings LLC | 10 | 10 | 0.00% | 0.01% | 0.01% | Q3 2013 | Q4 2015 | 10 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 7 | 7 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q1 2020 | 7 |
| IMC-Chicago, LLC | 2 | 2 | 0.00% | 0.00% | 0.00% | Q4 2018 | Q1 2019 | 2 |
| CSS LLC/IL | 1 | 1 | 0.04% | 0.04% | 0.04% | Q4 2013 | Q4 2013 | 1 |
| TWO SIGMA SECURITIES, LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2019 | Q3 2019 | 1 |
| PEAK6 Group LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2014 | Q3 2014 | 1 |
| KNIGHT CAPITAL GROUP LLC | 1 | 1 | 0.01% | 0.01% | 0.01% | Q2 2013 | Q2 2013 | 1 |
| JPMORGAN CHASE & CO | 1 | 1 | 0.00% | 0.00% | 0.00% | Q4 2017 | Q4 2017 | 1 |
| Apollo Management Holdings, L.P. | 1 | 1 | 0.10% | 0.10% | 0.10% | Q2 2015 | Q2 2015 | 1 |
This page lists all the filers that currently own AK STL HLDG CORP or have owned AK STL HLDG CORP in the past.