| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 7 | 7 | 0.00% | 0.00% | 0.01% | Q4 2015 | Q2 2017 | 7 |
| SIMPLEX TRADING, LLC | 4 | 2 | 0.00% | 0.00% | 0.00% | Q1 2016 | Q3 2017 | 6 |
| Citadel Advisors | 2 | 2 | 0.00% | 0.00% | 0.00% | Q1 2016 | Q2 2016 | 2 |
This page lists all the filers that currently own NORTH ATLANTIC DRILLING LTD or have owned NORTH ATLANTIC DRILLING LTD in the past.