| Radio Frequency Identification (RFID) |
| Rain check |
| Ralph Izzo |
| Ralph J. Roberts |
| Ralph Lauren (Entrepreneur) |
| Ralph Lauren Corporation (RL) |
| Ramon Laguarta |
| Ray Dalio |
| Ray Kroc |
| Ray Stata |
| Raymond James Financial (RJF) |
| Raymond Kralovic |
| Raytheon Technologies (RTX) |
| Real estate |
| Real estate investment trust (REIT) |
| Real-Time Locating Systems (RTLS) |
| Realty Income Corporation (O) |
| Rebate |
| Reed Hastings |
| Regency Centers Corporation (REG) |
| Regeneron Pharmaceuticals (REGN) |
| Regions Financial Corporation (RF) |
| Reinsurance |
| Renaissance Technologies |
| Renminbi (RMB) |
| Republic Services (RSG) |
| Research Models and Services (RMS) |
| Reserve Bank of Australia (RBA) |
| Reserve Bank of India (RBI) |
| ResMed (RMD) |
| Restaurant Brands International (QSR) |
| RESTful API (Representational State Transfer) |
| Revenue |
| Rho |
| Rich Barton |
| Richard Adam Norwitt |