| UMH | | Real Estate Investment Trusts | 752642 |
| UNB | | State Commercial Banks | 706863 |
| UNCY | | Pharmaceutical Preparations | 1766140 |
| UNF | | Services-Personal Services | 717954 |
| UNFI | | Wholesale-Groceries, General Line | 1020859 |
| UNG | | Commodity Contracts Brokers & Dealers | 1376227 |
| UNH | | Hospital & Medical Service Plans | 731766 |
| UNIT | | Telephone Communications (No Radiotelephone) | 2020795 |
| UNL | | Commodity Contracts Brokers & Dealers | 1405513 |
| UNM | | Accident & Health Insurance | 5513 |
| UNP | | Railroads, Line-Haul Operating | 100885 |
| UNTY | | State Commercial Banks | 920427 |
| UNXP | | Transportation Services | 1751707 |
| UOKA | | Real Estate Agents & Managers (For Others) | 1741534 |
| UONE | | Radio Broadcasting Stations | 1041657 |
| UP | | Air Transportation, Nonscheduled | 1819516 |
| UPB | | Pharmaceutical Preparations | 2022626 |
| UPBD | | Services-Equipment Rental & Leasing, NEC | 933036 |
| UPC | | Pharmaceutical Preparations | 1809616 |
| UPLD | | Services-Prepackaged Software | 1505155 |
| UPS | | Trucking & Courier Services (No Air) | 1090727 |
| UPST | | Finance Services | 1647639 |
| UPWK | | Services-Computer Processing & Data Preparation | 1627475 |
| UPX | | General Bldg Contractors - Nonresidential Bldgs | 2046370 |
| UPXI | | Finance Services | 1775194 |
| UPYY | | Services-Prepackaged Software | 1677897 |
| URBN | | Retail-Family Clothing Stores | 912615 |
| URG | | Gold and Silver Ores | 1375205 |
| URGN | | Pharmaceutical Preparations | 1668243 |
| URI | | Services-Equipment Rental & Leasing, NEC | 1067701 |
| UROY | | Commodity Contracts Brokers & Dealers | 1711570 |
| URZEF | | - | 1398713 |
| USA | | - | 799195 |
| USAC | | Natural Gas Transmission | 1522727 |
| USAQ | | Surgical & Medical Instruments & Apparatus | 856984 |
| USAR | | Metal Mining | 1970622 |
| USAS | | Metal Mining | 1286973 |
| USAU | | Metal Mining | 27093 |
| USB | | National Commercial Banks | 36104 |
| USBC | | Finance Services | 1074828 |
| USCB | | State Commercial Banks | 1901637 |
| USCI | | Commodity Contracts Brokers & Dealers | 1479247 |
| USCTF | | Blank Checks | 1860514 |
| USDE | | Finance Services | 2080215 |
| USEA | | Water Transportation | 1912847 |
| USEG | | Crude Petroleum & Natural Gas | 101594 |
| USFD | | Wholesale-Groceries & Related Products | 1665918 |
| USGDF | | - | 1726159 |
| USGO | | Gold and Silver Ores | 1947244 |
| USIC | | - | 1940366 |
