| Radiological Imaging Technology, Inc. | Colorado |
| Radiology Partners | California |
| Radiomate Corporation | California |
| RadioMedix | |
| RadioMedix, Inc. | Texas |
| Radiomer Therapeutics | |
| Radionetics Oncology | California |
| Radiophone Engineering, Inc. | Missouri |
| Radiophone Wireless, Inc. | Missouri |
| RadioShack Corporation | Texas |
| RadioSoft, Inc. | Georgia |
| Radish Agency | |
| Radish Systems | Colorado |
| Radisys | Oregon |
| Raditek, Inc. | California |
| Radius Advertising | |
| Radius Agent | |
| Radius Health, Inc. | Massachusetts |
| Radius Media Solutions | Florida |
| Radius Systems, LLC | Pennsylvania |
| Radius Ventures, LLC | New York |
| RadiusAI | Arizona |
| RadiusAI, Inc. | Arizona |
| RadiusPoint | Tennessee |
| RadiusTheme, LLC | |
| RadiusXR, Inc. | |
| Radivision | California |
| Radix Automation, Inc. | California |
| Radix Interactive | |
| Radix Labs | Massachusetts |
| Radix, Inc. | Arizona |
| RADLogics, Inc. | New York |
| RadMD | Pennsylvania |
| RadNet, Inc. | California |
| Radra Solutions | Illinois |
| RadSource Imaging Technologies, Inc. | Missouri |
| RadTech | Missouri |
| Radware Technologies, Inc. | Minnesota |
| RadWeb Technologies, LLC | Florida |
| Radyus Research | Georgia |
| RAEK Data, LLC | Washington |
| RaeSedo | Arizona |
| RAF Electronics Corporation | California |
| RAFA AI | California |
| Rafflecopter | |
| Raft, LLC | |
| RafterOne | New Hampshire |
| Raftr, Inc. | Washington |
| Raga AI | |
| Raga Digital, LLC | |