| Abbreviation | Definition |
|---|---|
| USCG | US Capital Group, Incorporated (de-listed) |
| USCGX | USAA Mutual Capital Growth Fund |
| USCM | U S C I, Inc. |
| USCM | USCI, Incorporated (de-listed) |
| USCM | USCI, Incorporated (de-listed) |
| USCR | U S Crude, Limited |
| USDC | U S Data Corporation |
| USDI | U S Digital Communications, Inc. |
| USDL | U S Diagnostics, Inc. |
| USEC | Universal Security Instruments, Inc. |
| USEG | U S Energy Corporation |
| USEV | U S Environmental, Inc. |
| USEV | U.S. Environmental, Incorporated (de-listed) |
| USEV | U.S. Environmental, Incorporated (de-listed) |
| USEY | U S Energy Systems, Inc. |
| USEY | U.S. Energy Systems, Incorporated (de-listed) |
| USEY | U.S. Energy Systems, Incorporated (de-listed) |
| USEYW | U S Energy Systems, Inc. Warrants |
| USEYW | U.S. Energy Systems, Incorporated Warrants (de-listed) |
| USEYW | U.S. Energy Systems, Incorporated Warrants (de-listed) |