| TUSK | | Oil & Gas Field Services, NEC | 1679268 |
| TUTH | | Dental Equipment & Supplies | 1178660 |
| TUYA | | Services-Prepackaged Software | 1829118 |
| TV | | Television Broadcasting Stations | 912892 |
| TVA | | Blank Checks | 2033991 |
| TVAI | | Blank Checks | 1872228 |
| TVCN | | Communications Services, NEC | 1952670 |
| TVE | | Electric Services | 1376986 |
| TVGN | | Biological Products, (No Diagnostic Substances) | 1860871 |
| TVRD | | Pharmaceutical Preparations | 1346830 |
| TVTX | | Pharmaceutical Preparations | 1438533 |
| TW | | Security & Commodity Brokers, Dealers, Exchanges & Services | 1758730 |
| TWFG | | Insurance Agents, Brokers & Service | 2007596 |
| TWG | | Miscellaneous Food Preparations & Kindred Products | 1978057 |
| TWI | | Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens) | 899751 |
| TWIN | | General Industrial Machinery & Equipment | 100378 |
| TWLO | | Services-Prepackaged Software | 1447669 |
| TWN | | 0000 | 804123 |
| TWNP | | Retail-Eating Places | 2011954 |
| TWO | | Real Estate Investment Trusts | 1465740 |
| TWOH | | Services-Business Services, NEC | 1494413 |
| TWST | | Biological Products, (No Diagnostic Substances) | 1581280 |
| TX | | Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens) | 1342874 |
| TXG | | Laboratory Analytical Instruments | 1770787 |
| TXMD | | Pharmaceutical Preparations | 25743 |
| TXN | | Semiconductors & Related Devices | 97476 |
| TXNM | | Electric Services | 1108426 |
| TXO | | Crude Petroleum & Natural Gas | 1559432 |
| TXRH | | Retail-Eating Places | 1289460 |
| TXT | | Aircraft & Parts | 217346 |
| TY | | 0000 | 99614 |
| TYBB | | Services-Engineering, Accounting, Research, Management | 2025878 |
| TYFG | | State Commercial Banks | 1725262 |
| TYG | | - | 1268533 |
| TYGO | | Semiconductors & Related Devices | 1855447 |
| TYHT | | Services-Advertising | 2081842 |
| TYL | | Services-Prepackaged Software | 860731 |
| TYRA | | Pharmaceutical Preparations | 1863127 |
| TZOO | | Services-Advertising | 1133311 |
| TZUP | | Services-Computer Processing & Data Preparation | 1853825 |
| U | | Services-Prepackaged Software | 1810806 |
| UA | | Apparel & Other Finishd Prods of Fabrics & Similar Matl | 1336917 |
| UAC | | Blank Checks | 2098669 |
| UAL | | Air Transportation, Scheduled | 100517 |
| UAMY | | Primary Smelting & Refining of Nonferrous Metals | 101538 |
| UAN | | Agricultural Chemicals | 1425292 |
| UAVS | | Aircraft | 8504 |
| UBCP | | State Commercial Banks | 731653 |
| UBER | | Services-Business Services, NEC | 1543151 |
| UBFO | | National Commercial Banks | 1137547 |