| Abbreviation | Definition |
|---|---|
| IFO | InfoSonics Corporation |
| IG | IGI, Inc. |
| IGC | Interstate General, L. P. |
| IH | I C H Corporation |
| IHK | Imperial Sugar Company |
| IHM | Merrill Lynch & Company, Inc. |
| IHT | InnSuites Hospitality Trust |
| II | Intersystems, Inc., of Delaware |
| IKT | Intrust Capital Trust |
| ILI | Interlott Technologies, Inc. |
| ILX | I L X, Inc. |
| IMA | International Multimedia Association |
| IMG | Intermagnetics General Corporation |
| IMH | Impac Mortgage Holdings, Inc. |
| IMO | Imperial Oil, LTD. |
| IMX | Implant Sciences Corporation |
| INB | Community Independent Bank |
| INS | Intelligent Systems Corporation |
| INS | International Seaway Trading Corporation (de-listed) |
| IOI | Integrated Orthopedics, Inc. |