| Abbreviation | Definition |
|---|---|
| SPCT | Spectrian Corporation |
| SPDE | Speedus Corporation |
| SPDVE | SpaceDev, Inc. |
| SPEC | Spectrum Control, Inc. |
| SPEN | Sports Entertainment Enterprises |
| SPFO | Sparta Foods, Inc. |
| SPGCD | Sparta Surgical Corporation |
| SPGK | Sports Group International, Inc. |
| SPGLA | Spiegel, Inc. |
| SPGNA | Sepragen Corporation |
| SPGNA | Sepragen Corporation (de-listed) |
| SPGNA | Sepragen Corporation (de-listed) |
| SPGNU | Sepragen Corporation |
| SPGNU | Sepragen Corporation (de-listed) |
| SPGNU | Sepragen Corporation (de-listed) |
| SPGNW | Sepragen Corporation Warrants |
| SPGNW | Sepragen Corporation Warrants (de-listed) |
| SPGNW | Sepragen Corporation Warrants (de-listed) |
| SPGNZ | Sepragen Corporation |
| SPGNZ | Sepragen Corporation (de-listed) |