| Abbreviation | Definition |
|---|---|
| TP | T N T Post Groep, N. V. |
| TPI | P T Tri Polyta Indonesia |
| TPL | Texas Pacific Land Trust |
| TPP | Teppco Partners, L. P. |
| TPR | Transpro, Inc. |
| TR | Tootsie Roll Industries, Inc. |
| TRA | Terra Industries, Inc. |
| TRB | Tribune Company |
| TRC | Tejon Ranch Company |
| TRD | Tribune Company |
| TRE | Tremont Corporation of Delaware |
| TRF | Templeton Russia Fund, Inc. |
| TRH | TransAtlantic Holdings, Inc. |
| TRI | Triad Hospitals, Inc. |
| TRK | Speedway Motorsports, Inc. |
| TRL | Total Renal Care Holdings, Inc. |
| TRM | TCW/DW Term Trust 2002 (de-listed) |
| TRN | Trinity Industries, Inc. |
| TRO | Tele Centro Oeste Celular, P. A. |
| TRP | TransCanada Pipelines, LTD. |