| Abbreviation | Definition |
|---|---|
| SSY | Scisys |
| STA | Stagecoach The. |
| STAF | Staffline |
| STAN | Stand.chart. |
| STAN | Standard Chartered |
| STCM | Steppe Cement |
| STE | Stewart & Wight, PLC. Ordinary shares |
| STEC | Shieldtech |
| STEL | Stellar Diamond |
| STF | Smartfocus |
| STHR | Sthree |
| STI | Stratex |
| STIL | Stilfontein |
| STJ | St.james's Plac |
| STK | Suretrack |
| STL | Stilo Intl |
| STM | Stm Grp. |
| STOB | Stobart |
| STOR | Stobart Rfd |
| STR | Strategic |