- Care New England Health System
- Care Technologies, Inc.
- Career Communications Group
- Career Education Center
- CareFirst
- CarePoint Health - Christ Hospital
- CarePoint Health- Hoboken University Medical Center
- Carey Plumbing company llc
- CARF
- Cargill, Inc-Soybean Division
- Caribbean Medical Center
- Caribe Hilton San Juan
- Caribe Royale Resorts Suites and Villas
- Carilion Franklin Memorial Hospital
- Carilion Giles Community Hospital
- Carilion New River Valley Medical Center
- Carilion Roanoke Memorial Hospital
- Carilion Stonewall Jackson Hospital
- Carilion Tazewell Community Hospital
- Caring Foundation for Children
- Caring of Jackson County
- Caritas Health Services
- Caritas Norwood Hospital
- Cark Regional Medical Center
- Carl Franklin Homes
- Carl Sandburg College
- Carl T. Hayden VA Medical Center
- Carl W. Herrmann
- Carl Walker Construction Group Inc.
- Carle BroMenn Medical Center
- Carle Foundation Hospital
- Carle Health Methodist Hospital
- Carleton-Willard Village
- Carlisle Food Systems, Inc.
- Carlisle Regional Medical Center
- Carlow College
- Carlsbad CVB
- Carlsbad Medical Center
- Carlson and Associates Real Estate Services, Inc.
- Carlson Hotels Worldwide
- Carlyle Grand Cafe, Arlington, VA
- CarMax Inc.
- Carmelite Sisters for the Aged and Infirm
- Carnegie Mellon University
- Carnegie Museums of Pittsburgh
- Carol Harris Staffing, LLC
- Carol Woods Retirement Community
- Carolina Day School
- Carolina Donor Services
- Carolina East Medical Center