- Regional Allergy and Asthma Consultants, PA
- Regional Council of Rural Counties
- Regional Director's Office, VI, HHS
- Regional Emergency Medical Services Authority (REMSA)
- Regional Health Rapid City Hospital
- Regional Health Services of Howard County
- Regional Health Spearfish Hospital
- Regional Medical Center
- Regional Medical Center
- Regional Medical Center Anniston Northeast AL
- Regional Medical Center Bayonet Point
- Regional Medical Center Blytheville
- Regional Medical Center of Central Alabama
- Regional Medical Center of San Jose
- Regional One Health Medical Center
- Regional Organ Bank of Illinois
- Regional Rehabilitation Hospital
- Regional Women's Health Office
- Regions Hospital
- Regis College
- Regulatory Affairs Professionals Society
- Rehab Management, Inc
- Rehab Partners
- RehabCare Group
- REHABWORKS
- Rehrig Pacific Co.
- Reid Health
- Reigel Plumbing and Heating
- Reingold
- Reinsurance Association of America
- Reiter Lowry Consultants Team
- Related Group of Florida
- Relay Productions, Inc.
- Reliable Chevrolet, Inc.
- Reliance State Bank
- Reliant Medical Products Inc.
- Religious Conference Management Association
- Relios, Inc.
- Relm Wireless
- Rem Association Services
- REM Legislative Services Inc
- Remote Rental Care
- REMSA
- Renaissance Cleveland Hotel
- Renaissance Fort Lauderdale Hotel
- Renaissance Harborplace Hotel
- Renaissance Hotel
- Renaissance Hotel North, Dallas
- Renaissance Mobile Riverview Plaza Hotel
- Renaissance Nashville Hotel