- Channing House
- Chapparal House
- Chartwell Retirement Residents
- CHE Behavioral Health Services
- Cheesecake Factory
- CHESS
- CHI Franciscan
- CHI Living Communities
- Chicago Title National Commercial Services
- Chicago Tribune
- CHMS Group
- ChoiceCare Management
- Christ Hospital health Network
- Christian Care Center of Texarkana
- Christian Homes
- Christian Living Communities
- Chronic Care Management
- CHSGa
- CIBC
- CIBC Bank