| Regency Interactive Corporation | North Carolina |
| Regency Technologies | Ohio |
| RegeneMed, Inc. | |
| ReGenerating Solutions, Inc. | Connecticut |
| Regeneration Biomedical, Inc. | California |
| Regeneration.VC | |
| Regenerative Medical Solutions, Inc. | Wisconsin |
| Regenerative Patch Technologies, LLC | |
| Regeneris Medical | Massachusetts |
| Regeneron Pharmaceuticals, Inc. | |
| Regeneron Pharmaceuticals, Inc. | |
| Regenesis | |
| Regenevita Biocell | Texas |
| Regenexx | Iowa |
| Regenity Biosciences | New Jersey |
| Regenovva | North Carolina |
| Regenstrief Institute | |
| REGENT Craft, Inc. | |
| Regent University | Virginia |
| ReGenTree, LLC | New Jersey |
| Regentys | Florida |
| ReGenX, Inc. | Maryland |
| Regenxbio, Inc. | |
| Regex SEO | Texas |
| Regie.ai | California |
| Regional Accelerator and Innovation Network (RAIN) Catalysts | Oregon |
| Regional Economic Development for Eastern Idaho | |
| Regional Teleco | Alabama |
| Regis Technologies, Inc. | |
| Regis University | Colorado |
| Register Everywhere, Inc. | California |
| Register Success | Wisconsin |
| Register.com | New York |
| Registrar Manager, Inc. | Illinois |
| Registrar.com | California |
| RegistrarSEC, LLC | California |
| Reglagene, Inc. | Arizona |
| Regor Therapeutics Group | |
| Regrello | |
| Regrow | |
| RegScale, Inc. | Virginia |
| Regulatory Affairs Associates | |
| Rehinged | California |
| Rehman Technology Services, Inc. | Florida |
| Reibus International, Inc. | |
| Reichert Brothers, LLC | |
| Reichert, Inc. | New York |
| Reid State Technical College | Alabama |
| Reighn Communications | Pennsylvania |
| Reign Ventures | New York |