| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 11 | 1 | 0.00% | 0.00% | 0.01% | Q1 2015 | Q3 2023 | 29 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 21 | 21 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2023 | 21 |
| Timber Hill LLC | 10 | 1 | 0.00% | 0.01% | 0.01% | Q2 2013 | Q4 2016 | 13 |
| Citadel Advisors | 11 | 11 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q4 2015 | 11 |
| GROUP ONE TRADING, L.P. | 4 | 1 | 0.00% | 0.00% | 0.00% | Q3 2020 | Q2 2023 | 6 |
| Maven Securities LTD | 2 | 2 | 0.01% | 0.01% | 0.01% | Q2 2021 | Q3 2021 | 2 |
| JANE STREET GROUP, LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q2 2022 | Q3 2023 | 2 |
| PEAK6 Group LLC | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2014 | Q3 2014 | 1 |
| Allianz Asset Management GmbH | 1 | 1 | 0.00% | 0.00% | 0.00% | Q2 2020 | Q2 2020 | 1 |
| Garda Capital Partners LP | 1 | 1 | 0.06% | 0.06% | 0.06% | Q3 2023 | Q3 2023 | 1 |
This page lists all the filers that currently own AMEREN CORP or have owned AMEREN CORP in the past.