| Period | Weighting | Quarter | ||||||
|---|---|---|---|---|---|---|---|---|
| Company | Longest | Shortest | Min. | Avg. | Max. | First | Latest | ↓ Count |
| GROUP ONE TRADING, L.P. | 2 | 2 | 0.04% | 0.09% | 0.14% | Q2 2013 | Q3 2013 | 2 |
| Citadel Advisors | 1 | 1 | 0.00% | 0.00% | 0.00% | Q2 2013 | Q2 2013 | 1 |
This page lists all the filers that currently own ARBITRON INC or have owned ARBITRON INC in the past.