| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 14 | 1 | 0.00% | 0.00% | 0.00% | Q4 2014 | Q3 2023 | 21 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 21 | 21 | 0.00% | 0.00% | 0.00% | Q3 2018 | Q3 2023 | 21 |
| GROUP ONE TRADING, L.P. | 1 | 1 | 0.00% | 0.00% | 0.00% | Q3 2023 | Q3 2023 | 1 |
This page lists all the filers that currently own NORTHWESTERN CORP or have owned NORTHWESTERN CORP in the past.