| Abbreviation | Definition |
|---|---|
| TNRK | TNR Technical, Incorporated (de-listed) |
| TNSU | Tanisys Technologies, Inc. |
| TNSU | Tanisys Technologies, Incorporated (de-listed) |
| TNSU | Tanisys Technologies, Incorporated (de-listed) |
| TNTMY | TNT, Ltd. Sponsors |
| TNTMY | TNT, LTD. Sponsors (de-listed) |
| TNTMY | TNT, LTD. Sponsors (de-listed) |
| TNTTF | Triant Technologies, Inc. |
| TNTTF | Triant Technologies, Incorporated (de-listed) |
| TNTTF | Triant Technologies, Incorporated (de-listed) |
| TNTU | Tengtu International Corporation |
| TNTX | T Netix, Inc. |
| TNZR | Tranz Rail Holding, LTD. |
| TOBC | Tower Bancorp, Inc. |
| TOBC | Tower Bancorp, Incorporated (de-listed) |
| TOCK | Topclick International, Inc. |
| TOCK | Topclick International, Incorporated (de-listed) |
| TOCK | Topclick International, Incorporated (de-listed) |
| TOCOF | Tom Com Limited |
| TODDA | A. O. Todd Corporation |