| Abbreviation | Definition |
|---|---|
| TRNS | Transmation, Inc., of Rochester |
| TRNT | Transnet Corporation |
| TROG | Triumph Oil & Gas |
| TROU | Tround International, Inc. |
| TROW | T. Rowe Price Associates, Inc. |
| TROXF | Trooper Technologies, Inc. |
| TROY | Troy Group, Inc. |
| TRPC | Tropic Air Cargo, Inc. |
| TRPS | Tripos, Inc. |
| TRQLF | Triquanta Investments, LTD. |
| TRRA | Terra Networks, S. A. |
| TRSD | Transcent Services, Inc. |
| TRSD | Transcent Services, Incorporated (de-listed) |
| TRSD | Transcent Services, Incorporated (de-listed) |
| TRSEF | Rose Corporation |
| TRSI | T R Systems, Inc. |
| TRST | Trustco Bank Corporation of New York |
| TRTI | Transtech Industries, Inc. |
| TRTI | Transtech Industries, Incorporated (de-listed) |
| TRTI | Transtech Industries, Incorporated (de-listed) |