| Abbreviation | Definition |
|---|---|
| IAIC | Information Analysis, Inc. |
| IAIS | International Aircraft Investors (delisted) |
| IAMK | Interactive Marketing Technology |
| IAMKE | Interactive Marketing Technology |
| IARC | Information Architecture Company |
| IART | Integra Lifesciences Corporation |
| IASCA | I A S Communications, Inc. Class A |
| IATV | A C T V, Inc. |
| IAUS | International Automation Systems, Inc. |
| IBAS | Ibasis, Inc. |
| IBCA | Intervest Bancshares Corporation |
| IBCB | Idaho Banking Company |
| IBCP | Independent Bank Corporation |
| IBCPP | Independent Bank Corporation Preferred |
| IBDB | Ironbound Bancorp of New Jersey |
| IBET | Trans World Gaming Corporation |
| IBETW | Trans World Gaming Corporation Warrants |
| IBFL | Independent BancShares, Inc. (Florida) |
| IBHVF | International Briquettes Holdings |
| IBIS | I B I S Technology Corporation |