| Abbreviation | Definition |
|---|---|
| SPGNZ | Sepragen Corporation (de-listed) |
| SPHI | Studio Plus Hotels, Inc. |
| SPHI | Studio Plus Hotels, Incorporated (de-listed) |
| SPHI | Studio Plus Hotels, Incorporated (de-listed) |
| SPHRE | Stratosphere Communications Corporation |
| SPIR | Spire Corporation |
| SPLH | Splash Technology Holdings, Inc. |
| SPLI | Spectra Physics Lasers, Inc. |
| SPLK | Spanlink Communications, Inc. |
| SPLN | Sportsline.Com, Inc. |
| SPLS | Staples, Inc. |
| SPLT | Splitrock Services, Inc. |
| SPMLE | Supermail International, Inc. |
| SPNC | Spectranetics Corporation |
| SPND | Spindletop Oil & Gas Company |
| SPNI | Spinnaker Industries, Inc. |
| SPNIA | Spinnaker Industries, Inc. Class A |
| SPNS | Sapiens International Corporation N. V. |
| SPNT | hopnet.com Inc |
| SPNT | Shopnet.com Inc |