| IEX | | Pumps & Pumping Equipment | 832101 |
| IFBD | | Services-Prepackaged Software | 1815566 |
| IFF | | Industrial Organic Chemicals | 51253 |
| IFN | | - | 917100 |
| IFNNY | | Semiconductors & Related Devices | 1107457 |
| IFRX | | Pharmaceutical Preparations | 1708688 |
| IFS | | Commercial Banks, NEC | 1615903 |
| IGA | | - | 1332943 |
| IGAC | | Blank Checks | 2075068 |
| IGC | | Pharmaceutical Preparations | 1326205 |
| IGD | | - | 1285890 |
| IGI | | - | 1462586 |
| IGIC | | Insurance Carriers, NEC | 1794338 |
| IGR | | - | 1268884 |
| IGTA | | Blank Checks | 1866838 |
| IH | | Services-Educational Services | 1814423 |
| IHD | | - | 1496292 |
| IHG | | Hotels & Motels | 858446 |
| IHICF | | - | 1567526 |
| IHRT | | Radio Broadcasting Stations | 1400891 |
| IHS | | Radiotelephone Communications | 1876183 |
| IHT | | Real Estate Investment Trusts | 82473 |
| IIF | | - | 916618 |
| III | | Services-Management Consulting Services | 1371489 |
| IIIN | | Steel Works, Blast Furnaces & Rolling & Finishing Mills | 764401 |
| IIIV | | Services-Prepackaged Software | 1728688 |
| IIM | | - | 885601 |
| IINN | | Surgical & Medical Instruments & Apparatus | 1837493 |
| IIPR | | Real Estate | 1677576 |
| IKT | | Biological Products, (No Diagnostic Substances) | 1750149 |
| ILAG | | Partitions, Shelvg, Lockers, & of fice & Store Fixtures | 1814963 |
| ILAL | | Land Subdividers & Developers (No Cemeteries) | 1657214 |
| ILLR | | Investment Advice | 1769624 |
| ILMN | | Laboratory Analytical Instruments | 1110803 |
| ILPT | | Real Estate Investment Trusts | 1717307 |
| ILST | | Patent Owners & Lessors | 1100788 |
| ILUS | | Motor Vehicles & Passenger Car Bodies | 1496383 |
| IMA | | Biological Products, (No Diagnostic Substances) | 1835579 |
| IMAA | | Services-Prepackaged Software | 1980295 |
| IMAQ | | Services-Motion Picture & Video Tape Production | 1846235 |
| IMAX | | Photographic Equipment & Supplies | 921582 |
| IMCC | | Medicinal Chemicals & Botanical Products | 1792030 |
| IMCR | | Biological Products, (No Diagnostic Substances) | 1671927 |
| IMDX | | In Vitro & In Vivo Diagnostic Substances | 1642380 |
| IMG | | Retail-Miscellaneous Retail | 1527613 |
| IMIMF | | - | 1866146 |
| IMKTA | | Retail-Grocery Stores | 50493 |
| IMMP | | Pharmaceutical Preparations | 1506184 |
| IMMR | | Computer Peripheral Equipment, NEC | 1058811 |
| IMMX | | Pharmaceutical Preparations | 1873835 |
