- Canyon County
- Canyon Vista Medical Center
- Cap Tech Ventures, Inc.
- Cape Canaveral Hospital
- Cape Cod Hospital
- Cape Coral Hospital
- Cape Environmental Management Inc.
- Cape Fear Valley Health System
- Cape Girardeau Drury Lodge
- Cape Girardeau Pear Tree Inn
- Capgemini U.S., LLC
- Capital AHEC
- Capital Area Health Network
- Capital Area United Way
- Capital Bank
- Capital Christian Center
- Capital City Fruit
- Capital City Harley-Davidson-Bue II
- Capital City Moose Lodge
- Capital Financial Group Inc.
- Capital Health Medical Center - Hopewell
- Capital Health Regional Medical Center
- Capital One
- Capital One 360
- Capital Region Medical Center
- Capital Regional Medical Center
- Capital Relocation Group Inc.
- Capital Soft
- Capitol Advantage
- Capitol Partners
- Capitol Plaza Hotel and Convention Center
- Capitol Plaza Hotel Topeka
- Capitol Steps
- Capitol West Boys and Girls Club
- Caprenter Bennett and Morrissey
- Capri South Beach Condos
- Capsonic Automotive Inc.
- Capstone Rural Health Center
- Carbide-Graphite Group, Inc.
- Cardia, Inc.
- Cardiac Assist, Inc.
- Cardiac Association of New Hampshire
- Cardinal Glennon Children's Hospital
- Cardinal Health
- Cardinal Health
- Cardinal Health
- Cardiva Medical, Inc
- Cardone Industries, Inc.
- Cardonelet Holy Cross Hospital
- Care Cremation & Burial