| Name | Exchange | Symbol | Last trade | Change | Mkt cap | |
| DeVries Public Relations, Ltd. | Private | |||||
| Cohn & Wolfe | Private | |||||
| Manning Selvage & Lee | Private | |||||
| Porter Novelli, Inc. | Private | |||||
| John Mallen Communications, Inc. | Private | |||||
| Southard Communications, Inc. | Private | |||||
| Palladian Partners, Inc. | Private | |||||
| Rogers & Cowan | Private | |||||
| PMK-BNC, Inc. | Private | |||||
| CMGRP, Inc. | Private | |||||
| Marston+Marston, Inc. | Private |