| Abbreviation | Definition |
|---|---|
| SONC | Sonic Corporation |
| SONE | S1 Corporation |
| SONI | Sonicport.Com, Inc. |
| SONNF | Sonora Diamond Corporation, LTD. |
| SONO | SonoSite, Inc. |
| SONO | SonoSite, Incorporated (de-listed) |
| SONO | SonoSite, Incorporated (de-listed) |
| SONOV | SonoSight, Inc. |
| SONOV | SonoSight, Incorporated (de-listed) |
| SONOV | SonoSight, Incorporated (de-listed) |
| SONX | Sonex Research, Inc. |
| SONX | Sonex Research, Incorporated (de-listed) |
| SONX | Sonex Research, Incorporated (de-listed) |
| SOPN | First Savings Bancorp, Inc., of North Carolina |
| SOPN | First Savings Bancorp, Incorporated, of North Carolina (de-listed) |
| SOPN | First Savings Bancorp, Incorporated, of North Carolina (de-listed) |
| SORBE | Sorbent Technologies Corporation |
| SORC | Source Information Management Company |
| SORTW | Gunther International, LTD Warrants |
| SORTW | Gunther International, LTD. Warrants (de-listed) |