| HONG KONG UNION CONTROL COMPANY LIMITED | Private company limited by shares | Live |
| SMART UNION TRADING LIMITED | Private company limited by shares | Live |
| TRINITY UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNI-ASCENT LIMITED | Private company limited by shares | Dissolved |
| HK UNI-SHINE CO., LIMITED | Private company limited by shares | Live |
| Union Funds Credit Entertainment Limited | Private company limited by shares | Dissolved |
| UNIFIED (HK) INDUSTRY LIMITED | Private company limited by shares | Live |
| UNITED GOAL LIMITED | Private company limited by shares | Live |
| UncleDOS.com Limited | Private company limited by shares | Dissolved |
| Union Color Printing Limited | Private company limited by shares | Live |
| Universal Property Agents Limited | Private company limited by shares | Dissolved |
| UNIPHONE LIMITED | Private company limited by shares | Live |
| UNION GLOBAL MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Live |
| ASIAN UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION MASTER INDUSTRIES LIMITED | Private company limited by shares | Live |
| GOLD UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNISON ENTERPRISE GROUP LIMITED | Private company limited by shares | Dissolved |
| UNITED LAB GAS LIMITED | Private company limited by shares | Live |
| Uni-Origin Developing Co., Limited | Private company limited by shares | Live |
| PROSPEROUS UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| International Social Union Global Mission Limited | Private company limited by shares | Live |
| UNIWEALTH INTERNATIONAL (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| EAST UNION GIFT COMPANY LIMITED | Private company limited by shares | Live |
| ASIAN TABLE TENNIS UNION LIMITED | Private company limited by shares | Live |
| UNION GAINER LIMITED | Private company limited by shares | Live |
| FULLYWELL UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNISON FIELD LIMITED | Private company limited by shares | Live |
| Unisoft China Limited | Private company limited by shares | Dissolved |
| CHINA UNI-COMMERCE CORPORATION LIMITED | Private company limited by shares | Live |
| UNIBEL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNLIMITED CONCERTS LIMITED | Private company limited by shares | Live |
| UNION FAITH ENTERPRISES LIMITED | Private company limited by shares | Live |
| SINO UNION (CHINA) LIMITED | Private company limited by shares | Live |
| Universal Managed Solutions Limited | Private company limited by shares | Live |
| UNI-WELL HONG KONG GROUP LIMITED | Private company limited by shares | Live |
| LEON UNITED LIMITED | Private company limited by shares | Dissolved |
| POLY UNION LIMITED | Private company limited by shares | Dissolved |
| GLORIOUS UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CHINA UNION STEEL CO., LIMITED | Private company limited by shares | Live |
| CLEAN AND FRESH DAILY CHEMICALS (THE UNITED STATES) HOLDINGS COMPANY LIMITED | Private company limited by shares | Dissolved |
| EVEREST UNION LIMITED | Private company limited by shares | Dissolved |
| NEW UNIVERSE TECHNOLOGY (HK) LIMITED | Private company limited by shares | Dissolved |
| LUCKY UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNISON ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| ASIA UNION (HK) SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| NEW UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| WISE UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| MILLION UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIMEX CHINA LIMITED | Private company limited by shares | Dissolved |
| WINNER UNION LIMITED | Private company limited by shares | Dissolved |
| SANING UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNIPOINT LIMITED | Private company limited by shares | Dissolved |
| UNION CHANCE GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION LEGEND GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION POWER GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION MATE GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION TOP GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| CHINA OVERSEAS NEWS PUBLICATION UNITED GROUP LIMITED | Private company limited by shares | Live |
| BUSINESS UNION HONG KONG CO., LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| Union Commonwealth Company Limited | Private company limited by shares | Dissolved |
| UNITED METALWORKS COMPANY LIMITED | Private company limited by shares | Live |
| SIBLING UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| World Martial Art Union Association Limited | Private company limited by shares | Dissolved |
| CHUNG FAT UNION TRADING COMPANY LIMITED | Private company limited by shares | Live |
| UNITY PROPERTY INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION COMMERCIAL MANAGEMENT LIMITED | Private company limited by shares | Live |
| CENTURY UNION (CHINA) INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| FORTUNE UNION TRADING LIMITED | Private company limited by shares | Live |
| CHINA FURNITURE SELLER UNION LIMITED | Private company limited by shares | Live |
| KONG UNION ECO DEVELOPMENT LIMITED | Private company limited by shares | Live |
| CHINA LOW CARBON INDUSTRY UNION LIMITED | Private company limited by shares | Live |
| UNITED ONE LIMITED | Private company limited by shares | Dissolved |
| United People Limited | Private company limited by shares | Live |
| UNION LINKER LIMITED | Private company limited by shares | Live |
| UNION PACIFIC (HK) CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION MARINE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| EASTERN UNION ENTERPRISE CORPORATION LIMITED | Private company limited by shares | Live |
| CNA UNIVERSITY SCHOOL ALLIANCE LIMITED | Private company limited by shares | Live |
| FRIEND UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| CHINESE UNITY ZHAOYE INVESTMENT GROUP LIMITED | Private company limited by shares | Dissolved |
| LINK UNION TRADING LIMITED | Private company limited by shares | Live |
| UNION LUCK INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| SKY UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| ASIAN UNION ELECTRONIC (HONGKONG) LIMITED | Private company limited by shares | Live |
| UNIQUE ONE LIMITED | Private company limited by shares | Dissolved |
| KEEN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION SMART CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNITED VIEW PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| G.T.C. UNION GROUP LIMITED | Private company limited by shares | Live |
| UNIQUE JEWELS LIMITED | Private company limited by shares | Live |
| Qiming Universal Limited | Private company limited by shares | Live |
| UNIVERSAL MAGNETS CO., LIMITED | Private company limited by shares | Dissolved |
| UNION FRIEND CAN INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| GREAT UNIVERSE TRADING LIMITED | Private company limited by shares | Live |
| UNIBURG LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| CHINA TECHNOLOGICAL ENTERPRISE UNION LIMITED | Private company limited by shares | Dissolved |