| Ubiquitous | California |
| UbiquiTx, Inc. | |
| Ubiquity | New York |
| Ubiquity University | |
| Ubiquity Ventures | California |
| Ubiterra Corporation | Colorado |
| UbiVac | Oregon |
| UBIX | California |
| UBM Technologies | |
| UBMe, Inc. | |
| Uboro, Inc. | |
| UBOS | |
| UBU Enterprises | Florida |
| UC Blue Ash College | Ohio |
| UC Clermont College | Ohio |
| UC Irvine Donald Bren School of Information & Computer Sciences | California |
| uCalc Software | Florida |
| UCB, Inc. | Georgia |
| UCC Wireless | Missouri |
| UCG Technologies | Ohio |
| UCLA Extension | California |
| uConnect, Inc. | |
| Ucraft | California |
| Ucribs, LLC | |
| UCRYA | |
| UCSC Silicon Valley Extension | California |
| UCT | Texas |
| UCView Media, Inc. | California |
| UDA Technologies, Inc. | Alabama |
| Udacity, Inc. | California |
| Udemy, Inc. | California |
| UDig, LLC | |
| uDocz, Inc. | |
| Udonis, Inc. | Delaware |
| UDS Tecnologia | |
| udu, Inc. | North Carolina |
| Uducat.com | Virginia |
| UEC Electronics | South Carolina |
| UEGroup | California |
| UFA, Inc. | Massachusetts |
| Uffizzi | Tennessee |
| uFlow, LLC | |
| UFP Technologies, Inc. | |
| UFS Technology | Wisconsin |
| UGE International Ltd | |
| UGEFCU | New York |
| Ugenome Biotech | Arizona |
| Ugly Duck Marketing | |
| UGRU | North Carolina |
| Uh-Oh Labs | |