| WORD | NAME | DESCRIPTION | |
| UGA | Country IDs | Uganda | |
| UKR | Country IDs | Ukraine | |
| UPSTREAMENERGY | Energy | 2510 - Upstream Energy | Full Description |
| URANIUM | Energy | 25101035 - Uranium Mining Since 2020-07-19, previously part of URANIUMRADIUMVANADIUM.XX1 | Full Description |
| URANIUMRADIUMVANADIUM.XX1 | Energy | 25101025 - Uranium, Radium and Vanadium Mining Discontinued 2020-07-19, replaced by RADIUMVANADIUM, URANIUM, and OREBASE | Full Description |
| UROLOGY | Healthcare | 35102065 - Urology Biopharmaceuticals | Full Description |
| URY | Country IDs | Uruguay | |
| USA | Country IDs | United States | |
| UTIL | Utilities | 65 - Utilities | Full Description |
| UTILELEC | Utilities | 65101010 - Electric Utilities | Full Description |
| UTILELECGAS | Utilities | 65101020 - Other Electric and Natural Gas Utilities | Full Description |
| UTILSS | Utilities | 6510 - Utilities | Full Description |