| Uhnder | Texas |
| Uhuru Network Texas, LLC | Texas |
| UI Bakery, Inc. | Colorado |
| UI8, LLC | California |
| UIB Holdings Pte Ltd | California |
| UIC Government Services, LLC | Virginia |
| UIC, Inc. | California |
| UIDesignz | |
| Uinno, LLC | |
| Uintah Basin Technical College | Utah |
| UIPath | New York |
| Uixotic Productions | Oregon |
| UJET 2019, Inc. | California |
| UKG, Inc. | Massachusetts |
| UKIE WEB, LLC | |
| Ukko, Inc. | |
| UL Solutions | Illinois |
| ULedger, Inc. | Washington |
| Ulink Internet Services | California |
| Ulistic | |
| uLocally | |
| Uloop, Inc. | |
| Ulrich Medical USA | Texas |
| Ulsaker Studio, Inc. | Connecticut |
| Ultera Systems, Inc. | California |
| Ulterior Technologies | |
| UltiDev, LLC | Georgia |
| UltiHost | Florida |
| ULTIM Marketing | |
| Ultima Genomics, Inc. | California |
| Ultima Networks | California |
| Ultimate Host | New York |
| Ultimate Internet Access, Inc. | California |
| Ultimate Marketing Group | |
| Ultimate PC | Virginia |
| Ultimate Software, LLC | Wisconsin |
| Ultimate Support Systems | Colorado |
| Ultimate System | |
| Ultimate Web Design Company | |
| Ultimate Web Designing | Iowa |
| Ultimecom | |
| Ultimus Careers | North Carolina |
| UltiSat, Inc. | |
| Ultisim, Inc. | North Carolina |
| Ultius, Inc. | |
| Ultivue, Inc. | Massachusetts |
| Ultra | Florida |
| Ultra Capital | |
| Ultra Clean Holdings, Inc. | California |
| Ultra Codes, LLC | |