| Abbreviation | Definition |
|---|---|
| SDOPB | San Diego Gas & Electric Company Preferred B |
| SDOPC | San Diego Gas & Electric Company Preferred C |
| SDOPH | San Diego Gas & Electric Company Preferred H |
| SEA | Bio- Aqua Systems, Inc. |
| SEB | Seaboard Corporation of Delaware |
| SES | Stav Electrical Systems 1994 issue |
| SEV | Seven Seas Petroleum, Inc. |
| SFO | Sonic Foundary, Inc. |
| SFT | Stratesec, Inc. |
| SGA | Saga Communications, Inc. |
| SGB | Southwest Georgia Financial Corporation |
| SGC | Superior Uniform, Inc., of Florida |
| SHD | Sherwood Brands, Inc. |
| SHF | Schuff International, Inc. |
| SHM | Sheffield Pharmaceuticals, Inc. |
| SIF | Sifco Industries, Inc. |
| SIL | Apex Silver Mines, LTD. |
| SIM | Grupo Simec S. A. de C. V. |
| SIS | Paine Webber Group, Inc. |
| SJW | S J W Corporation |