| AEP | | Electric Services | 4904 |
| AER | | Services-Equipment Rental & Leasing, NEC | 1378789 |
| AERG | | Search, Detection, Navigation, Guidance, Aeronautical Sys | 879911 |
| AERO | | Air Transportation, Scheduled | 1561861 |
| AERT | | Services-Management Consulting Services | 1853044 |
| AES | | Cogeneration Services & Small Power Producers | 874761 |
| AESI | | Crude Petroleum & Natural Gas | 1984060 |
| AEVA | | Motor Vehicle Parts & Accessories | 1789029 |
| AEXA | | Blank Checks | 2079173 |
| AEYE | | Services-Prepackaged Software | 1362190 |
| AFA | | Medicinal Chemicals & Botanical Products | 2054964 |
| AFB | | - | 1162027 |
| AFBI | | Savings Institutions, Not Federally Chartered | 1823406 |
| AFCG | | Real Estate | 1822523 |
| AFG | | Fire, Marine & Casualty Insurance | 1042046 |
| AFJK | | Blank Checks | 1979005 |
| AFL | | Accident & Health Insurance | 4977 |
| AFRI | | Grain Mill Products | 1903870 |
| AFRM | | Personal Credit Institutions | 1820953 |
| AFYA | | Services-Educational Services | 1771007 |
| AG | | Gold and Silver Ores | 1308648 |
| AGAE | | Services-Amusement & Recreation Services | 1708341 |
| AGCC | | Wholesale-Beer, Wine & Distilled Alcoholic Beverages | 2060016 |
| AGCO | | Farm Machinery & Equipment | 880266 |
| AGD | | - | 1362481 |
| AGEN | | Biological Products, (No Diagnostic Substances) | 1098972 |
| AGGI | | Retail-Nonstore Retailers | 1109262 |
| AGH | | Services-Membership Sports & Recreation Clubs | 2009312 |
| AGI | | Gold and Silver Ores | 1178819 |
| AGIO | | Pharmaceutical Preparations | 1439222 |
| AGL | | Services-Misc Health & Allied Services, NEC | 1831097 |
| AGLY | | Services-Management Consulting Services | 1673504 |
| AGM | | Federal & Federally-Sponsored Credit Agencies | 845877 |
| AGMH | | Services-Computer Programming Services | 1705402 |
| AGMRF | | - | 2022059 |
| AGNC | | Real Estate Investment Trusts | 1423689 |
| AGNPF | | Pharmaceutical Preparations | 1642178 |
| AGO | | Surety Insurance | 1273813 |
| AGQ | | Commodity Contracts Brokers & Dealers | 1415311 |
| AGRO | | Agricultural Production-Crops | 1499505 |
| AGRZ | | Agricultural Production-Crops | 2009233 |
| AGSS | | Services-Detective, Guard & Armored Car Services | 1514443 |
| AGTX | | Biological Products, (No Diagnostic Substances) | 1603345 |
| AGX | | Construction - Special Trade Contractors | 100591 |
| AGXPF | | - | 1482436 |
| AGYS | | Services-Computer Integrated Systems Design | 78749 |
| AHCO | | Services-Home Health Care Services | 1725255 |
| AHG | | Services-Business Services, NEC | 1702318 |
| AHH | | Real Estate | 1569187 |
| AHII | | Sanitary Services | 1545236 |
