| UNITEC HOLDING LIMITED | Private company limited by shares | Live |
| UNITED BROTHERS GROUP LIMITED | Private company limited by shares | Live |
| Unison Manufacturing HK Limited | Private company limited by shares | Live |
| PIONEER CHINA UNION LIMITED | Private company limited by shares | Live |
| UNION PLUS LIMITED | Private company limited by shares | Live |
| XINXING UNITED GROUP LIMITED | Private company limited by shares | Live |
| LEGEND UNION FAR EAST LIMITED | Private company limited by shares | Live |
| BROTHERS UNION TRADING LIMITED | Private company limited by shares | Live |
| UNION (C-HK) LIMITED | Private company limited by shares | Live |
| Nation Union Construction Machinery Co., Limited | Private company limited by shares | Live |
| CHINA FREE TRADE UNION CO., LIMITED | Private company limited by shares | Dissolved |
| Union Import & Export Co., Limited | Private company limited by shares | Live |
| Hong Kong Ever Union Container Company Limited | Private company limited by shares | Live |
| UNION ONE (HK) INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| Universal Foods Holding Company Limited | Private company limited by shares | Live |
| Sincoza Union Machinery Co., Limited | Private company limited by shares | Live |
| Union Marine Service & Consultancy Co., Limited | Private company limited by shares | Live |
| Universal Resources Industrial Co., Limited | Private company limited by shares | Live |
| UNION SHOPPING GUIDE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SINO SHAOSHANG UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| METRO UNION CORPORATION LIMITED | Private company limited by shares | Live |
| ASIA UNIVERSAL LIMITED | Private company limited by shares | Live |
| Rui Lin International Union Investment Holdings Group Limited | Private company limited by shares | Live |
| HK Union Medical Service Co., Limited | Private company limited by shares | Dissolved |
| ASIAN UNION TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| CHINA FINANCIER UNION LIMITED | Private company limited by shares | Live |
| CHINA UNION ONE CO., LIMITED | Private company limited by shares | Live |
| KASUN UNITED COMPANY LIMITED | Private company limited by shares | Live |
| UNICROSS PROJECTS LIMITED | Private company limited by shares | Live |
| United Transport Expert Limited | Private company limited by shares | Live |
| UNION OCEAN INT'L MARINE LIMITED | Private company limited by shares | Live |
| WORLD INVESTMENT UNION LIMITED | Private company limited by shares | Live |
| University Technology Limited | Private company limited by shares | Live |
| HENSON UNION TECH LIMITED | Private company limited by shares | Live |
| UNION DELTA CO., LIMITED | Private company limited by shares | Live |
| Uniherb Herbal Company Limited | Private company limited by shares | Live |
| Little Universe International Trading Limited | Private company limited by shares | Live |
| UNITY PACKING PROVIDER (ASIA) LIMITED | Private company limited by shares | Live |
| Spain Jinete Universal Clothing Company Limited | Private company limited by shares | Live |
| CAPITAL CHINA INDUSTRY UNION LIMITED | Private company limited by shares | Live |
| Unitedman Marine Service (Hong Kong) Limited | Private company limited by shares | Live |
| H UNITED CONTRACTOR COMPANY LIMITED | Private company limited by shares | Live |
| HOI PING UNION LIMITED | Private company limited by shares | Live |
| TOTAL UNION GROUP LIMITED | Private company limited by shares | Live |
| Dawkins Universal Limited | Private company limited by shares | Live |
| RISA UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNION CHINA ENTERPRISER CLUB LIMITED | Private company limited by shares | Live |
| UNION TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| C&C UNICENTRIC CO., LIMITED | Private company limited by shares | Live |
| Universal Marble Trading Company Limited | Private company limited by shares | Dissolved |
| LUCK UNION LIMITED | Private company limited by shares | Live |
| UNION CITY INDUSTRIAL LIMITED | Private company limited by shares | Live |
| ASIA PACIFIC UNION LIMITED | Private company limited by shares | Live |
| Rambo Union Technology Center (HK) Limited | Private company limited by shares | Live |
| SKY UNIQUE GPS LIMITED | Private company limited by shares | Live |
| Uniqconfer Limited | Private company limited by shares | Live |
| CHIEF PANAMAX UNION CO., LIMITED | Private company limited by shares | Live |
| UNION YIELD TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNITED TRADING LIMITED | Private company limited by shares | Live |
| UNITED SEA TRADE LIMITED | Private company limited by shares | Live |
| UNION ACE INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| UnioPo Tech Co., Limited | Private company limited by shares | Live |
| UNION BEST TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION HONOR INTERNATIONAL TRADING (HK) LIMITED | Private company limited by shares | Dissolved |
| UNION POWER SOURCES TECH. CO., LIMITED | Private company limited by shares | Live |
| CHING YING TAEKWONDO UNION LIMITED | Private company limited by shares | Live |
| Children Union International Education Centre Company Limited | Private company limited by shares | Live |
| BENEFIT UNIVERSE 9786 INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| Hope Union Group Company Limited | Private company limited by shares | Live |
| GLOBAL PROJECTS & FUNDING UNION (HK) LIMITED | Private company limited by shares | Live |
| China Southern Union Co., Limited | Private company limited by shares | Live |
| United Nations International News Media Publishing Group Limited | Private company limited by shares | Live |
| HY UNION INVESTMENT (CHINA) LIMITED | Private company limited by shares | Live |
| WIDE UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION GLORY GOLD HOLDINGS LIMITED | Private company limited by shares | Live |
| HARVEST UNIVERSAL TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| UNIGREEN TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONGKONG TIANTAI UNION GROUP LIMITED | Private company limited by shares | Live |
| Union Engineering Service Limited | Private company limited by shares | Live |
| UNIHEART CHARITY LIMITED | Company limited by guarantee | Live |
| Hong Kong Union Industry Group Limited | Private company limited by shares | Live |
| UNITED ENTERPRISE GROUP LIMITED | Private company limited by shares | Live |
| UNIVERSAL ALLIANCE LIMITED | Private company limited by shares | Live |
| GOOD UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| MILLION UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION BRILLIANT INT'L DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Global Universe Biological Engineering Limited | Private company limited by shares | Live |
| BRIGHT UNION TRADING LIMITED | Private company limited by shares | Live |
| WELL UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| BRIDGE UNION COMPANY LIMITED | Private company limited by shares | Live |
| GDP Union Limited | Private company limited by shares | Live |
| CHINA SKY UNION SHIPPING CO., LIMITED | Private company limited by shares | Live |
| World's Loyalty Union Co., Limited | Private company limited by shares | Live |
| REDBUD UNION INVESTMENTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNIVERSE ALUMINIUM AND GLASS ENGINEERING LIMITED | Private company limited by shares | Live |
| United Artemis Limited | Private company limited by shares | Live |
| CT Universal Company Limited | Private company limited by shares | Dissolved |
| UNIVERSAL PRODUCTIONS HK CO LIMITED | Private company limited by shares | Live |
| UNITED WISE CAPITAL INVESTMENT LIMITED | Private company limited by shares | Live |
| WISE UNION (CHINA) LIMITED | Private company limited by shares | Live |