| Unica Asia Limited | Private company limited by shares | Live |
| Uniconsult Limited | Private company limited by shares | Live |
| Unitech Electronic Co., Limited | Private company limited by shares | Live |
| OASIS UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UniFIX Company Limited | Private company limited by shares | Live |
| NOBLE UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| Uni-Sakura International Co., Limited | Private company limited by shares | Live |
| RISE UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| HK UNITED WIN-WIN TECHNOLOGY LIMITED | Private company limited by shares | Live |
| XSD UNION SOLAR TECH LIMITED | Private company limited by shares | Live |
| Universe Century Trading Company Limited | Private company limited by shares | Live |
| Universal shipping group Limited | Private company limited by shares | Live |
| UNION WIN SHIPPING (HK) LIMITED | Private company limited by shares | Live |
| Asian Union Quality Inspection Center Limited | Private company limited by shares | Live |
| JSP Universal Group Limited | Private company limited by shares | Live |
| UNIVERSE INTERNATIONAL DEVELOP LIMITED | Private company limited by shares | Live |
| UNIWILL ASIA LIMITED | Private company limited by shares | Live |
| GLOBAL WOMAN ENTREPRENEUR UNION LIMITED | Company limited by guarantee | Live |
| HONORWAY UNIVERSAL LIMITED | Private company limited by shares | Live |
| Union Rich Engineering & Consultancy Limited | Private company limited by shares | Live |
| Social Workers Education Union Limited | Company limited by guarantee | Live |
| FAI UNIVERSAL TRADING LIMITED | Private company limited by shares | Live |
| TRUMP UNION LIMITED | Private company limited by shares | Live |
| SURE UNION LIMITED | Private company limited by shares | Live |
| UNIVERSAL INTER CAPITAL LIMITED | Private company limited by shares | Live |
| ALLIED UNION LIMITED | Private company limited by shares | Live |
| Kwai Tsing Harmonious Union Limited | Company limited by guarantee | Live |
| Ultimate United Limited | Company limited by guarantee | Live |
| UNION CORE SEMICONDUCTOR CO., LIMITED | Private company limited by shares | Live |
| UNITED BASE LIMITED | Private company limited by shares | Live |
| Uncle Boy Catering Limited | Private company limited by shares | Live |
| Fung Wah International Union Limited | Private company limited by shares | Live |
| Honok Universal Limited | Private company limited by shares | Live |
| UNIEARTHSAL LIMITED | Private company limited by shares | Live |
| Tsuen Wan Harmonious Union Limited | Company limited by guarantee | Live |
| HK UNITED SHENG TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Union of science and Engineering Publishing Limited | Private company limited by shares | Live |
| NEW UNION INTERNATIONAL RESOURCES CO., LIMITED | Private company limited by shares | Live |
| UNBOXCOLLECTIBLES LIMITED | Private company limited by shares | Live |
| UNIFIED COMMERCE GROUP HONG KONG LIMITED | Private company limited by shares | Live |
| PUBLIC HEALTH UNION LIMITED | Private company limited by shares | Live |
| UniCoupon Company Limited | Private company limited by shares | Live |
| UNITED AGRICULTURE (ASIA) COMPANY LIMITED | Private company limited by shares | Live |
| UNIK BEST INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Pet Pet Union Club Limited | Private company limited by shares | Live |
| Eagle Union Legal Consulting Limited | Private company limited by shares | Live |
| Jiayuan International Construction Group United Co., Limited | Private company limited by shares | Live |
| RCEP STARS AND SEA UNION LIMITED | Private company limited by shares | Live |
| HONG KONG TECH UNION GROUP LIMITED | Private company limited by shares | Live |
| Union Tech Group (H.K.) Limited | Private company limited by shares | Live |
| HONGKONG RONGJITANG WORLD PUBLIC WELFARE UNION LIMITED | Private company limited by shares | Live |
| XIULIYA UNDERWEAR COMPANY LIMITED | Private company limited by shares | Live |
| CYBER UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION LINK ENGINEERING LIMITED | Private company limited by shares | Live |
| ASIA UNION TRADING LIMITED | Private company limited by shares | Live |
| MAX STAR UNION LIMITED | Private company limited by shares | Live |
| Third Eyes Universe International Limited | Private company limited by shares | Live |
| Untitled 00 Limited | Private company limited by shares | Live |
| Sanding International Construction Group United Co., Limited | Private company limited by shares | Live |
| UNITED MORAL LIMITED | Private company limited by shares | Live |
| HK UNITED SUPPLY CHAIN LIMITED | Private company limited by shares | Live |
| MULTI UNION MEGA TRADE LIMITED | Private company limited by shares | Live |
| Medica Union TCM Clinic Limited | Private company limited by shares | Live |
| Unwind Box Limited | Private company limited by shares | Live |
| Yun VC Union International Holding Co., Limited | Private company limited by shares | Live |
| Unxtech Co., Limited | Private company limited by shares | Live |
| UNITED COMPONENTS LIMITED | Private company limited by shares | Live |
| United Smart Company Limited | Private company limited by shares | Live |
| UNIVERSE GROUP HOLDING LIMITED | Private company limited by shares | Live |
| UNION STAR GROUP HOLDING LIMITED | Private company limited by shares | Live |
| HK United Talent Agency Limited | Private company limited by shares | Live |
| Union Vert International Trading Limited | Private company limited by shares | Live |
| UNITED GROUP HOLDING LIMITED | Private company limited by shares | Live |
| Unique Care Design Limited | Private company limited by shares | Live |
| SMART UNIVERSES COMPANY LIMITED | Private company limited by shares | Live |
| Unionhat Fashions Manufacturing Co., Limited | Private company limited by shares | Live |
| NEW UNION TOP (HONG KONG) LIMITED | Private company limited by shares | Live |
| HK Praise Unity Limited | Private company limited by shares | Live |
| BRIGHT UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Unique Infinity Limited | Private company limited by shares | Live |
| Hong Kong Heart Union Limited | Company limited by guarantee | Live |
| Universe's Head07 Trading Limited | Private company limited by shares | Live |
| Success Universe Wine (Greater China) Limited | Private company limited by shares | Live |
| Unity Medical Limited | Private company limited by shares | Live |
| UNIVEST LIMITED | Private company limited by shares | Live |
| Three Union Environmental Service Company Limited | Private company limited by shares | Live |
| UNION TECH HOLDINGS CO., LIMITED | Private company limited by shares | Live |
| Kingsway Union Limited | Private company limited by shares | Live |
| Hong Kong UNIPLUS CO., Limited | Private company limited by shares | Live |
| Fly Dragon United Company Limited | Private company limited by shares | Live |
| UNION STAR ELECTRONICS LIMITED | Private company limited by shares | Live |
| SMART UNION CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION PLUS (HK) LIMITED | Private company limited by shares | Live |
| UNIPORT LIMITED | Private company limited by shares | Live |
| Powerful Universe International Limited | Private company limited by shares | Live |
| UNCIVILIAN Limited | Private company limited by shares | Live |
| VAST UNIVERSE CO., LIMITED | Private company limited by shares | Live |
| FN United Limited | Private company limited by shares | Live |
| Unithouse Limited | Private company limited by shares | Live |
| Universal Resource Reallocation Union Holdings Limited | Private company limited by shares | Live |