| Abbreviation | Definition |
|---|---|
| USLBW | U.S. Laboratories, Incorporated Warrants (de-listed) |
| USLBW | U.S. Laboratories, Incorporated Warrants (de-listed) |
| USLM | U S Lime & Minerals |
| USLM | United States Lime & Minerals, Incorporated |
| USLNQ | U S LAN Systems Corporation |
| USMC | American Image Motors, Inc. |
| USMC | Principal United States Mega-Cap Multi-Factor Index Exchange Traded Fund |
| USMD | U S Medical Products, Inc. |
| USMD | U.S. Medical Products, Incorporated (de-listed) |
| USMD | U.S. Medical Products, Incorporated (de-listed) |
| USMW | United States Medical Products, Inc. |
| USNA | U S A N A, Inc. |
| USNA | USANA Health Sciences, Incorporated |
| USNT | U S National Commercial of Pennsylvania |
| USNU | U. S. Neurosurgical, Inc. |
| USOL | U S O L Holdings, Inc. |
| USOL | USOL Holdings, Incorporated (de-listed) |
| USOL | USOL Holdings, Incorporated (de-listed) |
| USOLW | U S O L Holdings, Inc. Warrants |
| USOLW | USOL Holdings, Incorporated Warrants (de-listed) |