- RAND Center for the Study of Aging
- RAND Corporation
- RBC Capital Markets
- RCA Healthcare Management
- Real Capital Analytics
- Real Time Medical Services
- Real Time Medical Systems
- REBusinessOnline
- REBusinessOnline.com
- Recovery Centers of America
- Recruitment
- RED Capital
- RED Capital Group
- RED Mortgage Capital
- ReedSmith
- Reflexion Health
- Regal Care
- Regency Gresham
- Regency Integrated Health Services
- Regenstrief Institute
