| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| SIMPLEX TRADING, LLC | 13 | 13 | 0.00% | 0.00% | 0.00% | Q1 2015 | Q1 2018 | 13 |
| GROUP ONE TRADING, L.P. | 7 | 1 | 0.00% | 0.00% | 0.01% | Q1 2015 | Q4 2017 | 8 |
| Citadel Advisors | 6 | 6 | 0.00% | 0.00% | 0.00% | Q1 2015 | Q2 2016 | 6 |
| WATER ISLAND CAPITAL LLC | 1 | 1 | 0.17% | 0.17% | 0.17% | Q4 2017 | Q4 2017 | 1 |
This page lists all the filers that currently own ORBITAL ATK INC or have owned ORBITAL ATK INC in the past.