| ULTRA WEALTHY LIMITED | Private company limited by shares | Live |
| ULTRA WELL INVESTMENT LIMITED | Private company limited by shares | Live |
| ULTRA WINNING LIMITED | Private company limited by shares | Live |
| ULTRA WISDOM LIMITED | Private company limited by shares | Live |
| ULTRA WISE LIMITED | Private company limited by shares | Live |
| ULTRA WISE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ULTRA WISE INVESTMENT LIMITED | Private company limited by shares | Live |
| ULTRA YEAR LIMITED | Private company limited by shares | Dissolved |
| ULTRA YEAR LIMITED | Private company limited by shares | Live |
| ULTRA YIELD COMPANY LIMITED | Private company limited by shares | Dissolved |
| ULTRA ZEST LIMITED | Private company limited by shares | Live |
| ULTRA ZONE LIMITED | Private company limited by shares | Dissolved |
| ULTRA ZONE LIMITED | Private company limited by shares | Live |
| Ultra-Array HK Technology Limited | Private company limited by shares | Live |
| ULTRA-ASIA LIMITED | Private company limited by shares | Dissolved |
| ULTRABA LIMITED | Private company limited by shares | Live |
| Ultrabee Limited | Private company limited by shares | Live |
| ULTRABEST COMPANY LIMITED | Private company limited by shares | Dissolved |
| ULTRA-BEST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Ultrabest Trading Co., Limited | Private company limited by shares | Dissolved |
| ULTRA-BEST INT'L TRADING LIMITED | Private company limited by shares | Dissolved |
| UltraBiz Limited | Private company limited by shares | Live |
| ULTRABIZ SOLUTION LIMITED | Private company limited by shares | Live |
| Ultrable New Energy Co., Limited | Private company limited by shares | Live |
| ULTRABLOOM INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ULTRABRIDGE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ULTRABRIDGE INVESTMENTS (1983) LIMITED | Private company limited by shares | Dissolved |
| ULTRACA LIMITED | Private company limited by shares | Live |
| ULTRACARE MEDICAL & DENTAL SERVICES LIMITED | Private company limited by shares | Dissolved |
| UltraChip HK Limited | Private company limited by shares | Live |
| UltraCircuits Technology Limited | Private company limited by shares | Live |
| ULTRACOM LIMITED | Private company limited by shares | Dissolved |
| ULTRACOM LIMITED | Private company limited by shares | Dissolved |
| ULTRACOM TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Ultracombo Limited | Private company limited by shares | Live |
| UltraConnexus Limited | | Live |
| ULTRACORP COMPANY LIMITED | Private company limited by shares | Dissolved |
| ULTRADATA LIMITED | Private company limited by shares | Dissolved |
| ULTRADATA HK LIMITED | | Live |
| ULTRA-DELUXE LIMITED | Private company limited by shares | Dissolved |
| ULTRADIANT LIMITED | Private company limited by shares | Live |
| UltraDx HK Limited | | Live |
| HK ULTRAEC LIMITED | Private company limited by shares | Live |
| ULTRA-ELEGANT LIMITED | Private company limited by shares | Dissolved |
| ULTRAFAIR LIMITED | Private company limited by shares | Live |
| ULTRAFAIR INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ULTRAFAME LIMITED | Private company limited by shares | Dissolved |
| ULTRAFAME ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| ULTRAFAST BEAUTY LIMITED | Private company limited by shares | Live |
| ULTRAFAST C. T. (HONG KONG) LIMITED | Private company limited by shares | Live |
| ULTRAFAST MEDICAL LABORATORY LIMITED | Private company limited by shares | Live |
| Ultrafast Systems Limited | Private company limited by shares | Live |
| Ultrafei Limited | | Live |
| ULTRAFIELD CROSS MEDIA ENTERTAINMENT LIMITED | Private company limited by shares | Dissolved |
| ULTRAFINE LIMITED | Private company limited by shares | Live |
| ULTRAFIRM ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| ULTRAFIT LIMITED | Private company limited by shares | Dissolved |
| ULTRAFIT LIMITED | Private company limited by shares | Live |
| UltraForce International Limited | Private company limited by shares | Dissolved |
| ULTRA-FORTUNE LIMITED | Private company limited by shares | Dissolved |
| UltraFresh Trading Company Limited | Private company limited by shares | Live |
| ULTRAFUND INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| ULTRAFUTURE WORLD LIMITED | Private company limited by shares | Dissolved |
| ULTRAGAIN LIMITED | Private company limited by shares | Live |
| ULTRAGLAD LIMITED | Private company limited by shares | Live |
| ULTRAGLOW LIMITED | Private company limited by shares | Dissolved |
| ULTRAGOOD LIMITED | Private company limited by shares | Dissolved |
| ULTRAGRACE LIMITED | Private company limited by shares | Dissolved |
| ULTRAGRAND LIMITED | Private company limited by shares | Dissolved |
| ULTRAGRAPHICS LIMITED | Private company limited by shares | Live |
| Ultragrowth Company Limited | Private company limited by shares | Live |
| ULTRA-GROWTH TRAVEL LIMITED | Private company limited by shares | Dissolved |
| UltraGuard Asia Limited | Private company limited by shares | Dissolved |
| ULTRAHAPPY LIMITED | Private company limited by shares | Live Ceased dormancy on 13-Jun-2013 |
| CHINA FUNIK ULTRAHARD MATERIAL CO., LIMITED | Private company limited by shares | Live |
| ULTRAIN LIMITED | Private company limited by shares | Live |
| ULTRA-INFO LIMITED | Private company limited by shares | Live |
| Ultral Tech Engineering Limited | Private company limited by shares | Live |
| Ultralast China Limited | Private company limited by shares | Dissolved |
| ULTRALEAD LIMITED | Private company limited by shares | Live |
| UltraLED Lighting Co., Limited | Private company limited by shares | Live |
| IMS ULTRALIFE LIMITED | | Live |
| 925 ULTRALIGHT CO., LIMITED | Private company limited by shares | Dissolved |
| JIANGSU ULTRA-LIGHT INDUSTRY LIMITED | Private company limited by shares | Live |
| ULTRALINE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ULTRALINK LIMITED | Private company limited by shares | Dissolved |
| ULTRALINK LIMITED | Private company limited by shares | Dissolved |
| UltraLink Limited | Private company limited by shares | Live |
| ULTRALIS LIMITED | Private company limited by shares | Live |
| ULTRALITE LIMITED | Private company limited by shares | Dissolved |
| ULTRALITE ASIA LIMITED | Private company limited by shares | Dissolved |
| ULTRALUCK LIMITED | Private company limited by shares | Dissolved |
| ULTRALUXE LIMITED | Private company limited by shares | Dissolved |
| ULTRALUXE LIMITED | Private company limited by shares | Dissolved |
| ULTRAMAIN SYSTEMS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ULTRAMAR LIMITED | Private company limited by shares | Dissolved |
| AIM Ultramar Limited | Private company limited by shares | Dissolved |
| 135 MILES INTERNATIONAL SUPER ULTRAMARATHON (WORLD) ASSOCIATION LIMITED | Private company limited by shares | Live |
| Ultramarch International Company Limited | Private company limited by shares | Live |
| ULTRAMARINE LIMITED | Private company limited by shares | Live |