| Abbreviation | Definition |
|---|---|
| UHCI | Universal Standard Healthcare |
| UHCO | Universal American Financial Corporation |
| UHCP | United Heritage Corporation |
| UHID | Universal Health Services Inc. |
| UHTS | Universal Heights, Inc. |
| UIBI | Universal Ice Blast, Inc. |
| UICO | Unico, Inc., of Oklahoma |
| UICO | Unico, Incorporation, of Oklahoma (de-listed) |
| UICO | Unico, Incorporation, of Oklahoma (de-listed) |
| UIFC | United Financial Corporation |
| UIRT | United Investors Realty Trust |
| UISI | United Information Systems, Inc. |
| UJSA | Urban Juice & Soda Company, LTD. |
| UKAC | U K & Associates Corporation |
| UKTRF | U K T Recycling Technologies, Inc. |
| ULAB | USLab.Com, Inc. |
| ULBI | UltraLife Batteries, Inc. |
| ULE | Ultra Electric Holdings |
| ULGX | Urologix, Inc. |
| ULTC | Ultimate Cigar Company, Inc. (formerly Ultimate Direct, Inc.) |