| UNION CAPITAL GROUP (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION SKY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| STAR UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| PACIFIC UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| UNION ART PRODUCTION COMPANY LIMITED | Private company limited by shares | Live |
| CHIEF UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| China Union Aluminum Pro. Company Limited | Private company limited by shares | Dissolved |
| UNION LINK ENGINEERING CONSTRUCTION LIMITED | Private company limited by shares | Live |
| Galaxy Union Intl Limited | Private company limited by shares | Live |
| WORLD NEW RURAL UNION LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION FINANCIAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| VICTOR UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION DIGITAL (INTERNATIONAL) COMPANY LIMITED | Private company limited by shares | Live |
| UNION STEP LIMITED | Private company limited by shares | Live |
| GB UNION CO., LIMITED | Private company limited by shares | Live |
| UNION FAITH GROUP HOLDINGS LIMITED | Private company limited by shares | Live |
| HONG KONG UNION INDUSTRIAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CENTRAL PROPERTIES LIMITED | Private company limited by shares | Live |
| CREATION UNION LIMITED | Private company limited by shares | Live |
| UNION RESOURCES LIMITED | Private company limited by shares | Live |
| UNION COLOUR INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Union Catalysts Co., Limited | Private company limited by shares | Dissolved |
| WEALTHY UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION PARTNERS LIMITED | Private company limited by shares | Dissolved |
| RICH UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCEED LIMITED | Private company limited by shares | Live |
| PACIFIC UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Global Design Union Limited | Private company limited by shares | Live |
| UNION SINO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION SINO HOLDINGS LIMITED | Private company limited by shares | Live |
| LOYAL UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION BAGS CO., LIMITED | Private company limited by shares | Live |
| WEAL UNION LIMITED | Private company limited by shares | Live |
| UNION FIELD LIMITED | Private company limited by shares | Live |
| CROWN UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION OCEAN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION BASE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION GREAT (HONG KONG) LIMITED | Private company limited by shares | Live |
| BIG UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| RN UNION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| EVER UNION SHIPPING LIMITED | Private company limited by shares | Live |
| UNION LINK LIMITED | Private company limited by shares | Live |
| BIG UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| BIG UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| HUGE UNION (ASIA) LIMITED | Private company limited by shares | Live |
| RICH UNION CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION STAR TRADING LIMITED | Private company limited by shares | Live |
| UNION STAR (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| HONGKONG EASTERN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Hong Kong Union Business Co., Limited | Private company limited by shares | Dissolved |
| HUA UNION LOGISTICS (HK) CO., LIMITED | Private company limited by shares | Live |
| CHINA UNION HUIJIN INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION CHINA MINERAL RESOURCES LIMITED | Private company limited by shares | Dissolved |
| PORT UNION (H.K.) INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| AUSTRALIA UNION YONGSHENG BIOTECHNOLOGY GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION TEXTILE & GARMENT CO., LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Union Investment Holdings Limited | Private company limited by shares | Live |
| UNION HAIR PRODUCTS CO., LIMITED | Private company limited by shares | Live |
| UNION WELL INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| TECH UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Union City Property Agency Limited | Private company limited by shares | Live |
| RAINBOW UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SOUTHWESTERN UNION LOGISTICS COMPANY LIMITED | Private company limited by shares | Live |
| UNION GARDENING COMPANY LIMITED | Private company limited by shares | Dissolved |
| WIDE UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Royal Union Hong Kong Limited | Private company limited by shares | Live |
| UNION STEEL LIMITED | Private company limited by shares | Live |
| WORLD CHINESE COLLECTORS UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION BASE TECHNICAL SERVICES LIMITED | Private company limited by shares | Live |
| THREE UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| Union Clive Engineering Limited | Private company limited by shares | Live |
| CREATIVE AQUASCAPE UNION LIMITED | Private company limited by shares | Live |
| Shenzhen Union Lighting Technology Co., Limited | Private company limited by shares | Live |
| UNION SPACE DESIGN LIMITED | Private company limited by shares | Live |
| CHINA UNION FUN INTERNATIONAL INVESTMENT GROUP LIMITED | Private company limited by shares | Dissolved |
| TinaBian China Travel Union Co., Limited | Private company limited by shares | Dissolved |
| FORTUNE UNION INTERNATIONAL (HK) LIMITED | Private company limited by shares | Live |
| VAST UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| PROFOUND UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION OCEAN CONTAINERS (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| MUTUAL UNION LIMITED | Private company limited by shares | Dissolved |
| HOLLAND HAYLLIX UNION LIMITED | Private company limited by shares | Dissolved |
| CROWN UNION CORPORATION LIMITED | Private company limited by shares | Live |
| INTERNATIONAL FURNISHING RESEARCH UNION CO., LIMITED | Private company limited by shares | Dissolved |
| EXCELLENT UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| GRAND UNION JOINT CHINA LIMITED | Private company limited by shares | Dissolved |
| ZHEJIANG NOVEL UNION CO., LIMITED | Private company limited by shares | Live |
| Canadian University Union Co., Limited | Private company limited by shares | Dissolved |
| SHENZHEN UNION TECH CO., LIMITED | Private company limited by shares | Live |
| UNION WAY INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION POWER GARMENT LIMITED | Private company limited by shares | Live |
| Pacific Union Technologies Co., Limited | Private company limited by shares | Live |
| CHINA HERO UNION GROUP CO., LIMITED | Private company limited by shares | Live |
| HK REDCHINA ENTERPRISE UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SEA UNION MARINE CO., LIMITED | Private company limited by shares | Live |
| MASTER UNION INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| SUNSHINE UNION LIMITED | Private company limited by shares | Live |