| Abbreviation | Definition |
|---|---|
| UPRD | Upware Technology Corporation (de-listed) |
| UPRD | Upware Technology Corporation (de-listed) |
| UPRO | ProShares UltraPro Standard & Poors 500 Exchange Traded Fund |
| UPRO | Uproar, Inc. |
| UPUP | United Payors & United Providers |
| UQST | Uniquest, Inc. |
| UQST | Uniquest, Incorporated (de-listed) |
| UQST | Uniquest, Incorporated (de-listed) |
| URBA | Urbana.Ca, Inc. |
| URBA | Urbana.Ca, Incorpoated (de-listed) |
| URBA | Urbana.Ca, Incorpoated (de-listed) |
| URBN | Urban Outfitters, Inc. |
| URBN | Urban Outfitters, Incorporated |
| UREC | Urecoats Industries, Inc. |
| UREC | Urecoats Industries, Incorporated (de-listed) |
| UREC | Urecoats Industries, Incorporated (de-listed) |
| URGI | United Retail Group, Inc. |
| URGI | United Retail Group, Incorporated (de-listed) |
| URGI | United Retail Group, Incorporated (de-listed) |
| URIX | Uranium Resources, Inc. |