| Z&D United Brothers Limited | Private company limited by shares | Live |
| WELLBORO UNIVERSAL LIMITED | Private company limited by shares | Live |
| M Units Limited | Private company limited by shares | Live |
| Universal Digital Entertainment Co., Limited | Private company limited by shares | Live |
| Unichem Oil Company Limited | Private company limited by shares | Live |
| UNION FIRE CO., LIMITED | Private company limited by shares | Live |
| UNION GUOYIN GROUP LIMITED | Private company limited by shares | Live |
| HONGKONG BAIJIA AUTO PARTS UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNITEFOR-TECH CO., LIMITED | Private company limited by shares | Live |
| UNITED EXCEL LIMITED | Private company limited by shares | Live |
| GUIYUAN UNION TRADING CO., LIMITED | Private company limited by shares | Live |
| Universe Cross-Border Supply Chain Co., Limited | Private company limited by shares | Live |
| GOOD UNION LIMITED | Private company limited by shares | Live |
| Advanced Financial Union Limited | Private company limited by shares | Live |
| Universal Cosmetic Supply Chain Limited | Private company limited by shares | Live |
| HK ZHEN ROAD TO FACE THE UNITED STATES AND BIOTECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| TOP VISION UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNITI INVESTMENT LIMITED | Private company limited by shares | Live |
| UNISPER LIMITED | Private company limited by shares | Live |
| Hong Kong Sports Therapists Union Limited | Private company limited by shares | Live |
| UNION WEALTH INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| ASIA UNION SERVICES LIMITED | Private company limited by shares | Live |
| CHINA ZHONGCHUANG UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| United Systems Limited | Private company limited by shares | Live |
| Ability Union (International) Company Limited | Private company limited by shares | Live |
| TREASURE GRACE UNIVERSE COMPANY LIMITED | Private company limited by shares | Live |
| Height & Unity Capital Limited | Private company limited by shares | Live |
| China Union Arts Limited | Private company limited by shares | Live |
| UNIVERSAL FAME PROSPEROUS LIMITED | Private company limited by shares | Live |
| UNION ADVANCE LIMITED | Private company limited by shares | Live |
| SUCCESS UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| British American United Holdings (Group) Co., Limited | Private company limited by shares | Live |
| UNION GOOD (CHINA) LIMITED | Private company limited by shares | Live |
| PIONEER UNION LIMITED | Private company limited by shares | Live |
| GLOBAL UNION WEALTH CREATION LIMITED | Private company limited by shares | Live |
| HK UNION LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| Union Petro International Trading Co., Limited | Private company limited by shares | Live Commenced dormancy on 06-Aug-2018 |
| GOOD UNION INTERNATIONAL LOGISTICS LIMITED | Private company limited by shares | Live |
| GREAT UNION MANAGEMENT LIMITED | Private company limited by shares | Live |
| UNION HILL PROPERTIES LIMITED | Private company limited by shares | Live |
| MAX UNION INC. LIMITED | Private company limited by shares | Live |
| UNICORNS DESIGN LIMITED | Private company limited by shares | Live |
| Best Union Industrial Company Limited | Private company limited by shares | Live |
| HONG KONG UNIHERTZ E-COMMERCE COMPANY LIMITED | Private company limited by shares | Live |
| United Standard Solar Technology Limited | Private company limited by shares | Live |
| UNION OLYMPIC LIMITED | Private company limited by shares | Live |
| Network Union Limited | Private company limited by shares | Live |
| UNITED POWER RESTAURANT LIMITED | Private company limited by shares | Live |
| WEBLEYWOOD UNIVERSAL LIMITED | Private company limited by shares | Live |
| Uni-opto Limited | Private company limited by shares | Live |
| CHINESE CAPITAL UNION FINANCIAL LIMITED | Private company limited by shares | Live |
| HK GRAND UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| IKON UNION PHARMA LIMITED | Private company limited by shares | Live |
| UNIVERSE IMPORT & EXPORT LIMITED | Private company limited by shares | Live |
| UNIVERSAL SUPPLY CHAIN MANAGEMENT CO., LIMITED | Private company limited by shares | Live |
| Ningbo Union Import & Export Co., Limited | Private company limited by shares | Live |
| Ants Union Limited | Private company limited by shares | Live |
| HK UNIQUE MANNEQUIN CO., LIMITED | Private company limited by shares | Live |
| Union Texong Company Limited | Private company limited by shares | Live |
| Uni-Resource International Co., Limited | Private company limited by shares | Live |
| Aimme United Company Limited | Private company limited by shares | Live |
| ASIAN UNION ARTWORK LABORATORY LIMITED | Private company limited by shares | Live |
| GRAND UNITED INC LIMITED | Private company limited by shares | Live |
| UNION CENTURY INC LIMITED | Private company limited by shares | Live |
| FAITH UNION TRADING LIMITED | Private company limited by shares | Live |
| MEILE INTERNATIONAL MEDICAL REHABILITATION UNION LIMITED | Private company limited by shares | Live |
| SEA UNION LIMITED | Private company limited by shares | Live |
| UNION LIKE TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| NINETY UNION TRADING LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL TRADING (HK) LIMITED | Private company limited by shares | Live |
| UNION CAPITAL WORLDWIDE GROUP LIMITED | Private company limited by shares | Live |
| Unique Orient Entertainment Limited | Private company limited by shares | Live |
| Best Universal (Hong Kong) Limited | Private company limited by shares | Live |
| UNI-VENTURE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION PROFIT INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| New Universal Company Limited | Private company limited by shares | Live |
| HONGKONG UNITED TANG INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| COMPLIANCE UNION CONSULTING LIMITED | Private company limited by shares | Live Commenced dormancy on 21-May-2018 |
| CHINA BUDO UNION CO., LIMITED | Private company limited by shares | Live |
| UniFi TransAsia Limited | Private company limited by shares | Live |
| SUNNY UNITY LIMITED | Private company limited by shares | Live |
| PLUS UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION LUCKY LIMITED | Private company limited by shares | Live |
| UNION BLESS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MC UNION TRADING CO., LIMITED | Private company limited by shares | Live |
| UNIFIED INC LIMITED | Private company limited by shares | Live |
| HONG KONG GOLD UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| Universal Display (Hong Kong) Limited | Private company limited by shares | Live |
| UNION (HK) EXCHANGE LIMITED | Private company limited by shares | Live |
| UNION FORTRESS AIR CONDITIONING ENGINEERING LIMITED | Private company limited by shares | Live |
| Elite Union Property Limited | Private company limited by shares | Live |
| UNITED STATES JINDA GLOBAL FINANCIAL HOLDING GROUP LIMITED | Private company limited by shares | Live |
| China Union Telecom Company Limited | Private company limited by shares | Live |
| Union Mission Advertising & Construction Company Limited | Private company limited by shares | Live |
| B&R SUPPLY-CHAIN FINANCE UNION LIMITED | Company limited by guarantee | Live |
| UNION KING TRADING LIMITED | Private company limited by shares | Live |
| UNION BOND INVESTMENT LIMITED | Private company limited by shares | Live |
| UNIVERSE COMMERCE LIMITED | Private company limited by shares | Live |
| UNION PACIFIC COMPANY LIMITED | Private company limited by shares | Live |
| UNITED WELL INVESTMENT LIMITED | Private company limited by shares | Live |