| Reworkd AI, Inc. | |
| Reworked | California |
| ReWritables Design & Hosting Services | New Hampshire |
| Rewst | Florida |
| Rex Black Consulting Services, Inc. | Texas |
| REX Digital Marketing, LLC | |
| Rex k12, Inc. | Wisconsin |
| Rex Medical | Pennsylvania |
| Rex Systems, Inc. | Wisconsin |
| Rexer Analytics | Massachusetts |
| Rexford H. Swain | |
| Rexit | |
| Rextag | |
| Rexx Electronic Communications | Nevada |
| Rey Consulting, Inc. | New Jersey |
| Reynen Court, Inc. | |
| Reynolds DeWalt | Massachusetts |
| Reytm | |
| Rezn8 | California |
| Rezo Therapeutics, Inc. | |
| Rezolute, Inc. | California |
| Rezometry | Florida |
| Rezonate, Inc. | Massachusetts |
| Rezora | |
| RezStream | Colorado |
| RezVen Partners, LLC | California |
| RF Code | Texas |
| RF Datacom, Inc. | Massachusetts |
| RF Globalnet | Pennsylvania |
| rf IDEAS, Inc. | Illinois |
| RF Imaging & Communication | Nevada |
| RF Industries | California |
| RF Laboratories, Inc. | Florida |
| RF Logic | New Hampshire |
| RF Mogul, Inc. | |
| RF Technology Americas, Inc. | Texas |
| RF Venue | |
| RF-Lambda USA, LLC | |
| RF-Smart | Florida |
| RFA Associates | Massachusetts |
| RFDepot.com, Inc. | Maryland |
| RFE International, Inc. | California |
| RFF Electronics | Colorado |
| RFgen Software | California |
| RFHIC Corporation | |
| RFID Journal, LLC | Georgia |
| RFID Solutions Online | Pennsylvania |
| RFID, Inc. | Colorado |
| RFID4U | California |
| RFIDENTITY, Inc. | |