- Cambridge Properties
- Capstead Mortgage Corporation
- Carlson Restaurants Worldwide
- The Catfish Institute
- Chick-fil-A
- Children's Medical Center of Dallas
- Choice Hotels International
- Circle K Stores
- CITGO Petroleum
- Claremont Economic Institute
- Clear Systems
- Comcast
- Comdisco
- Community Credit Union
- Compass Bank
- ConAgra Foods/Decker
- Concentra
- Consolidated Restaurant Operations
- Continental Airlines
- Coors Brewing Company
- Cornerstone Sports/Mark Brooks
- Crossmark
- Culinaire International
- Dallas Market Center
- Dallas Symphony Orchestra
- Dallas Convention & Visitors Bureau
- Dallas Zoo
- Dallas/Fort Worth International Airport