- Colorado Hospital Association
- Colorado Hotel and Lodging Association
- Colorado River Medical Center
- Colorado Society of Association Executives
- Colorado Springs - TownePlace Suites by Marriott
- Colorado Springs Convention and Visitor Bureau
- Colorado Veterinary Medical Association
- Colortree Inc. of Virginia
- Colquitt Regional Medical Center
- Columbia Gas of Virginia Inc.
- Columbia Lighting Corp.
- Columbia Memorial Health
- Columbia Metropolitan Convention and Visitors Bureau
- Columbia University School of Nursing
- Columbus Clinic
- Columbus College of Arts and Design
- Columbus Health Dept.
- Columbus Hospice of Georgia and Alabama
- Columbus Independent Baptist-Edgewood Christian School
- Columbus Ledger-Enquirer
- Columbus Machining
- Columbus Marriott Northwest, Dublin
- Columbus Museum
- Columbus North - Fairfield Inn by Marriott
- Columbus Prescription Pharmacies, Inc.
- Columbus Regional Healthcare System
- Columbus Regional Hospital
- Columbus Specialty Hospital
- Columbus State University
- Columbus Technical College
- Colusa Regional Medical Center
- Colwell Volunteer Fire Department
- Comanche County Memorial Hospital
- Comcast
- Comcast
- Comfort Designs
- Comfort Inn Airport East, El Paso
- Comfort Inn and Suites at I-85
- Comfort Inn Arlington South, Arlington
- Comfort Inn Cross Creek Fayetteville
- Comfort Inn Downtown - Ship Creek
- Comfort Inn Espanola
- Comfort Inn Executive Center, Wilmington
- Comfort Inn Hotel Columbia
- Comfort Inn International Drive
- Comfort Inn Jacksonville Beach
- Comfort Inn Mount Vernon
- Comfort Inn Rutland-Trolley Square, Rutland
- Comfort Inn West Atlantic City
- Comfort Inn, Charlotte