| Abbreviation | Definition |
|---|---|
| SYNC | Synchronica |
| SYR | Synergy Health Systems |
| SYR | Synergy Hlth. |
| SYS | System C |
| SZCD | Suez Cem.gdr S |
| TAEW | Taewoong S |
| TAIH | Taihua |
| TAL | Ten Alps |
| TALK | Talktalk Telecom Group, PLC., Ordinary shares |
| TALV | Talvivaara |
| TAM | Titan.a.regs |
| TAMW | Titan.a.wt Regs |
| TAN | Tanfield |
| TAST | Tasty |
| TAT | Tatung Reg S |
| TAT1 | Tatung 144A |
| TATE | Tate & Lyle |
| TAU | Tau Capital |
| TAW | Tawa |
| TBI | Trans Balkan Investments, PLC. |