| Abbreviation | Definition |
|---|---|
| SMPL | SimPlayer.Com, LTD. |
| SMPLF | Simplayer.Com (delisted) |
| SMPS | Simpson Industries, Inc. |
| SMPS | Simpson Industries, Incorporated (de-listed) |
| SMPS | Simpson Industries, Incorporated (de-listed) |
| SMPX | Symphonix Devices, Inc. |
| SMPX | Symphonix Devices, Incorporated (de-listed) |
| SMPX | Symphonix Devices, Incorporated (de-listed) |
| SMRA | Somera Communications |
| SMRKE | Southmark Corporation |
| SMRRE | Santa Maria Resorts, Inc. |
| SMRRE | Santa Maria Resorts, Incorporated (de-listed) |
| SMRRE | Santa Maria Resorts, Incorporated (de-listed) |
| SMRT | Stein Mart, Inc. |
| SMRT | Stein Mart, Incorporated |
| SMRZE | Southmark Corporation |
| SMSC | Standard Microsystems Corporation |
| SMSI | Smith Micro Software, Inc. |
| SMSI | Smith Micro Software, Incorporated |
| SMTB | Smithtown Bancorp, Inc. |