| Ultimate Sense Limited | Private company limited by shares | Live |
| ULTIMATE CATERING SERVICE LIMITED | | Live |
| ULTIMATE SOLUTION LIMITED | Private company limited by shares | Live |
| ULTIMATE SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| Ultimate Spirit Limited | | Live |
| Ultimate Sports Hub Limited | Private company limited by shares | Live |
| Ultimate Stable Limited | Private company limited by shares | Live |
| ULTIMATE STRATEGY COMPANY LIMITED | Private company limited by shares | Live |
| Ultimate Success Limited | Private company limited by shares | Live |
| ULTIMATE SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| ULTIMATE SYSTEMS LIMITED | Private company limited by shares | Live Commenced dormancy on 29-Oct-1994 |
| Ultimate Team Limited | Private company limited by shares | Live |
| ULTIMATE TRADE HK LIMITED | Private company limited by shares | Live |
| ULTIMATE TUNING LIMITED | Private company limited by shares | Live |
| ULTIMATE VALUE LIMITED | Private company limited by shares | Live |
| ULTIMATE VICTORY LIMITED | Private company limited by shares | Live |
| ULTIMATE VISION LIMITED | Private company limited by shares | Dissolved |
| ULTIMATE WEALTH LIMITED | Private company limited by shares | Live |
| ULTIMATECPA LIMITED | Private company limited by shares | Dissolved |
| Ultimate-exp Trading Limited | | Live |
| ULTIMATE-LINK LIMITED | Private company limited by shares | Dissolved |
| ULTIMATEPAY LIMITED | Private company limited by shares | Live |
| ULTIMATER LIMITED | Private company limited by shares | Dissolved |
| ULTIMATIVE ENERGIE DEUTSCHLAND LIMITED | | Live |
| ULTIMATUM LIMITED | Private company limited by shares | Dissolved |
| ULTIMAX LIMITED | Private company limited by shares | Dissolved |
| ULTIMAX LIMITED | Private company limited by shares | Dissolved |
| ULTIMAX ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ULTIMAX PLASTIC PRODUCTS LIMITED | Private company limited by shares | Live |
| ULTIMAX Technology Limited | Private company limited by shares | Live |
| ULTIMED LIMITED | Private company limited by shares | Dissolved |
| ULTIMERIT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SPORTS ULTIMIX COMPANY LIMITED | Private company limited by shares | Dissolved |
| ULTIMO LIMITED | Private company limited by shares | Dissolved |
| Ultimoda Limited | Private company limited by shares | Dissolved |
| ULTIMORE ESTATES LIMITED | Private company limited by shares | Dissolved |
| ULTIMOS LIMITED | Private company limited by shares | Dissolved |
| Ultimos Industrial Limited | Private company limited by shares | Live |
| ULTIMOS MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| ULTIMOSALTO LIMITED | Private company limited by shares | Live |
| Ultimos.io Limited | Private company limited by shares | Live |
| ULTIMUS CENTURY LIMITED | Private company limited by shares | Live |
| ULTINET SOLUTION LIMITED | Private company limited by shares | Live |
| Ultinity Network Technology Limited | | Live |
| Ultinux Resources Limited | Private company limited by shares | Dissolved |
| Ultipa Hong Kong Limited | Private company limited by shares | Live |
| ULTISENSE TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| ULTISOLAR NEW ENERGY CO., LIMITED | Private company limited by shares | Dissolved |