| IAUM | | Commodity Contracts Brokers & Dealers | 1759124 |
| IAUX | | Gold and Silver Ores | 1853962 |
| IBAC | | Blank Checks | 1998781 |
| IBATF | | Mining & Quarrying of Nonmetallic Minerals (No Fuels) | 1786318 |
| IBCP | | State Commercial Banks | 39311 |
| IBEX | | Services-Computer Processing & Data Preparation | 1720420 |
| IBG | | Beverages | 1924482 |
| IBIDF | | - | 1654508 |
| IBIO | | Pharmaceutical Preparations | 1420720 |
| IBIT | | Commodity Contracts Brokers & Dealers | 1980994 |
| IBKR | | Security Brokers, Dealers & Flotation Companies | 1381197 |
| IBM | | Computer & office Equipment | 51143 |
| IBN | | Commercial Banks, NEC | 1103838 |
| IBO | | Pharmaceutical Preparations | 1834105 |
| IBOC | | State Commercial Banks | 315709 |
| IBP | | General Bldg Contractors - Residential Bldgs | 1580905 |
| IBRX | | Biological Products, (No Diagnostic Substances) | 1326110 |
| IBTA | | Services-Advertising | 1538379 |
| ICCC | | In Vitro & In Vivo Diagnostic Substances | 811641 |
| ICCM | | Surgical & Medical Instruments & Apparatus | 1584371 |
| ICE | | Security & Commodity Brokers, Dealers, Exchanges & Services | 1571949 |
| ICFI | | Services-Management Consulting Services | 1362004 |
| ICG | | Semiconductors & Related Devices | 1895597 |
| ICHR | | Semiconductors & Related Devices | 1652535 |
| ICL | | Agricultural Chemicals | 941221 |
| ICLR | | Services-Commercial Physical & Biological Research | 1060955 |
| ICMB | | - | 1578348 |
| ICON | | Deep Sea Foreign Transportation of Freight | 1995574 |
| ICR | | Real Estate Investment Trusts | 1690012 |
| ICTSF | | Services-Business Services, NEC | 1010134 |
| ICU | | Surgical & Medical Instruments & Apparatus | 1831868 |
| ICUI | | Surgical & Medical Instruments & Apparatus | 883984 |
| IDA | | Electric Services | 1057877 |
| IDAI | | Services-Prepackaged Software | 1718939 |
| IDCC | | Patent Owners & Lessors | 1405495 |
| IDE | | - | 1417802 |
| IDN | | Services-Prepackaged Software | 1040896 |
| IDR | | Gold and Silver Ores | 1030192 |
| IDT | | Telephone Communications (No Radiotelephone) | 1005731 |
| IDTL | | Services-Educational Services | 2045440 |
| IDVV | | Hotels, Rooming Houses, Camps & Other Lodging Places | 1611046 |
| IDXG | | Surgical & Medical Instruments & Apparatus | 1054102 |
| IDXMF | | - | 2067171 |
| IDXX | | In Vitro & In Vivo Diagnostic Substances | 874716 |
| IDYA | | Pharmaceutical Preparations | 1676725 |
| IE | | Metal Mining | 1879016 |
| IEAG | | Blank Checks | 2084396 |
| IEHC | | Electronic Connectors | 50292 |
| IEP | | Petroleum Refining | 813762 |
| IESC | | Electrical Work | 1048268 |
