| Term |
| UACL - Universal Truckload Services Inc. |
| UAHC - United American Healthcare Corporation |
| UAPH - UAP Holding Corp. |
| UAUA - UAL Corporation |
| UBCP - United Bancorp Inc. |
| UBET - Youbet.com Inc. |
| UBFO - United Security Bancshares |
| UBNK - United Financial Bancorp Inc. |
| UBOH - United Bancshares Inc. |
| UBSH - Union Bankshares Corporation |
| UBSI - United Bankshares Inc. |
| UCBA - United Community Bancorp |
| UCBH - UCBH Holdings Inc. |
| UCBI - United Community Banks Inc. |
| UCFC - United Community Financial Corp. |
| UCNN - UCN Inc. |
| UCTT - Ultra Clean Holdings Inc. |
| UDRL - Union Drilling Inc. |
| UEIC - Universal Electronics Inc. |
| UEPS - Net 1 UEPS Technologies Inc. |
| UFCS - United Fire & Casualty Company |
| UFPI - Universal Forest Products Inc. |
| UFPT - UFP Technologies Inc. |
| UHAL - Amerco |
| UHCP - United Heritage Corporation |
| ULBI - Ultralife Batteries Inc. |
| ULGX - Urologix Inc. |
| ULTA - Ulta Salon Cosmetics & Fragrance Inc. |
| ULTI - Ultimate Software Group Inc. (The) |
| ULTR - Ultrapetrol (Bahamas) Limited |
| UMBF - UMB Financial Corporation |
| UMPQ - Umpqua Holdings Corporation |
| UNAM - Unico American Corporation |
| UNCA - Unica Corporation |
| UNCL - MRU Holdings Inc. |
| UNFI - United Natural Foods Inc. |
| UNIB - University Bancorp Inc Michigan |
| UNTD - United Online Inc. |
| UNTY - Unity Bancorp Inc. |
| UPFC - United PanAm Financial Corporation |
| URBN - Urban Outfitters Inc. |
| URRE - Uranium Resources Inc. |
| USAK - USA Truck Inc. |
| USAP - Universal Stainless & Alloy Products Inc. |
| USAT - USA Technologies Inc. |
| USATP - USA Technologies Inc. |
| USBI - United Security Bancshares Inc. |
| USEG - U.S. Energy Corp. |
| USHS - U.S. Home Systems Inc. |
| USLM - United States Lime & Minerals Inc. |
| USMO - USA Mobility Inc. |
| USNA - USANA Health Sciences Inc. |
| USPH - U.S. Physical Therapy Inc. |
| USTR - United Stationers Inc. |
| UTEK - Ultratech Inc. |
| UTHR - United Therapeutics Corporation |
| UTIW - UTi Worldwide Inc. |
| UTMD - Utah Medical Products Inc. |
| UTSI - UTStarcom Inc. |
| UVSP - Univest Corporation of Pennsylvania |
| UWBK - United Western Bancorp Inc. |
