| WING | | Retail-Eating Places | 1636222 |
| WINT | | Biological Products, (No Diagnostic Substances) | 946486 |
| WIT | | Services-Computer Programming Services | 1123799 |
| WIW | | - | 1267902 |
| WIX | | Services-Computer Programming, Data Processing, Etc. | 1576789 |
| WK | | Services-Prepackaged Software | 1445305 |
| WKC | | Wholesale-Petroleum & Petroleum Products (No Bulk Stations) | 789460 |
| WKEY | | Services-Computer Processing & Data Preparation | 1738699 |
| WKHS | | Motor Vehicles & Passenger Car Bodies | 1425287 |
| WKSP | | Motor Vehicle Parts & Accessories | 1096275 |
| WLAC | | Blank Checks | 2032379 |
| WLDN | | Services-Engineering Services | 1370450 |
| WLDS | | Computer Communications Equipment | 1887673 |
| WLFC | | Wholesale-Machinery, Equipment & Supplies | 1018164 |
| WLFFF | | - | 1544883 |
| WLGSF | | Construction - Special Trade Contractors | 1899658 |
| WLK | | Industrial Organic Chemicals | 1262823 |
| WLKP | | Industrial Organic Chemicals | 1604665 |
| WLSS | | Services-Health Services | 1887912 |
| WLTH | | Finance Services | 1524566 |
| WLY | | Books: Publishing or Publishing & Printing | 107140 |
| WM | | Refuse Systems | 823768 |
| WMB | | Natural Gas Transmission | 107263 |
| WMG | | Services-Amusement & Recreation Services | 1319161 |
| WMK | | Retail-Grocery Stores | 105418 |
| WMS | | Plastics Foam Products | 1604028 |
| WMT | | Retail-Variety Stores | 104169 |
| WNC | | Truck Trailers | 879526 |
| WNDW | | Industrial Organic Chemicals | 1071840 |
| WNEB | | Savings Institution, Federally Chartered | 1157647 |
| WNHK | | Real Estate | 1503658 |
| WNLV | | Services-Motion Picture & Video Tape Production | 1558740 |
| WNS | | Services-Business Services, NEC | 1356570 |
| WNW | | Soap, Detergents, Cleang Preparations, Perfumes, Cosmetics | 1787803 |
| WOK | | Surgical & Medical Instruments & Apparatus | 1929783 |
| WOLF | | Semiconductors & Related Devices | 895419 |
| WOLV | | Metal Mining | 1424404 |
| WOOF | | Retail-Retail Stores, NEC | 1826470 |
| WOR | | Steel Works, Blast Furnaces & Rolling & Finishing Mills | 108516 |
| WORX | | Services-Computer Processing & Data Preparation | 1674227 |
| WOW | | Cable & Other Pay Television Services | 1701051 |
| WPC | | Real Estate Investment Trusts | 1025378 |
| WPGCF | | - | 1404353 |
| WPM | | Gold and Silver Ores | 1323404 |
| WPP | | Services-Advertising Agencies | 806968 |
| WPRT | | Engines & Turbines | 1370416 |
| WRAP | | Ordnance & Accessories, (No Vehicles/Guided Missiles) | 1702924 |
| WRB | | Fire, Marine & Casualty Insurance | 11544 |
| WRBY | | Ophthalmic Goods | 1504776 |
| WRD | | Services-Computer Integrated Systems Design | 1867729 |
