| Quantum Capital Asia Limited | Private company limited by shares | Live |
| Quantum Enterprises Asia Limited | | Live |
| QUANTUM SPORTS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| Quantum Sports Asia Limited | Private company limited by shares | Live |
| QUANTUM ASSETS LIMITED | Private company limited by shares | Dissolved |
| QUANTUM AUTO (H.K.) LIMITED | Private company limited by shares | Dissolved |
| HK NI SHI GUANG (QUANTUM BABY) BIOTECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| Aurora Quantum Physical Battery Co., Limited | Private company limited by shares | Live |
| QUANTUM BEAUTY LIMITED | Private company limited by shares | Live |
| QUANTUM TECHNOLOGIES BEIJING CO., LIMITED | Private company limited by shares | Live |
| NEW QUANTUM BIOLOGICAL TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Dr Quantum Biotech Limited | | Live |
| QUANTUM BIOTECH CO., LIMITED | Private company limited by shares | Live |
| QUANTUM BIOTECHNIX LIMITED | Private company limited by shares | Dissolved |
| QUANTUM BIOTECHNOLOGY (CHINA) CO., LIMITED | Private company limited by shares | Live |
| CHINA QUANTUM BIOTECHNOLOGY RESEARCH INSTITUTE LIMITED | | Live |
| HK HUIYUAN QUANTUM BIOTECHNOLOGY GROUP LIMITED | Private company limited by shares | Dissolved |
| HK QUANTUM MOMOBAO (TONG YAN) BIOTECHNOLOGY LIMITED | Private company limited by shares | Live |
| QUANTUM FINANCE BLOCKCHAIN LIMITED | Private company limited by shares | Live |
| AURORA BOREALIS QUANTUM TECHNOLOGY LIMITED | Private company limited by shares | Live |
| QUANTUM BRAIN LIMITED | | Live |
| Quantum Bright Investment Management Limited | Private company limited by shares | Live |
| QUANTUM BUILDING MATERIALS CO., LIMITED | Private company limited by shares | Live |
| QUANTUM CAPITAL LIMITED | Private company limited by shares | Dissolved |
| QUANTUM CAPITAL LIMITED | Private company limited by shares | Dissolved |
| QUANTUM CAPITAL LIMITED | Private company limited by shares | Live |
| Digital Quantum Capital Limited | Private company limited by shares | Live |
| CARBON QUANTUM DOTS (HK) TECHNOLOGY LIMITED | | Live |
| Quantum Carbon Technology (HK) Limited | | Live |
| Quantum Care Limited | Private company limited by shares | Live |
| Quantum Celeritas Limited | Private company limited by shares | Live |
| CELESTIAL QUANTUM HEALTHCARE CENTRE LIMITED | Private company limited by shares | Dissolved |
| Quantum Cell Research International Limited | Private company limited by shares | Live |
| Quantum Chain Limited | Private company limited by shares | Live |
| Quantum Chemical Co., Limited | Private company limited by shares | Live |
| QUANTUM NEW MATERIAL & CHEMICAL INDUSTRY LIMITED | Private company limited by shares | Live |
| Chengwei Capital Quantum Limited | Private company limited by shares | Live |
| Quantum Holding Group (China) Co., Limited | Private company limited by shares | Dissolved |
| Quantum Group China Co., Limited | Private company limited by shares | Live |
| Quantum Health China Limited | Private company limited by shares | Dissolved |
| QUANTUM IMPEX CHINA CO., LIMITED | Private company limited by shares | Dissolved |
| CHINA QUANTUM INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| Quantum Cloud Technology (China) Limited | Private company limited by shares | Live |
| Quantum Click Limited | Private company limited by shares | Live |
| QUANTUM CLOUD LIMITED | Private company limited by shares | Live |
| ASIA HARMONY QUANTUM CLOUD HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| Quantum Cloud Advanced Holding Co., Limited | Private company limited by shares | Live |
| AMERICA QUANTUM TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| QUANTUM BASE TECHNOLOGY CO., LIMITED | | Live |
| Quantum Investment (China) Co., Limited | Private company limited by shares | Live |
| Quantum Chip technology Co., Limited | | Live |
| Quantum Electric CO., LIMITED | Private company limited by shares | Live |
| QUANTUM GLOBAL INTERNATIAL CO., LIMITED | Private company limited by shares | Dissolved |
| CNE QUANTUM GROUP CO., LIMITED | Private company limited by shares | Live |
| HONG KONG QUANTUM TECHNOLOGY CO., LIMITED | | Live |
| QUANTUM FINANCIAL MANAGEMENT CO., LIMITED | Private company limited by shares | Live |
| Quantum Materials (Asia) Share Co., Limited | Private company limited by shares | Live |
| Shenzhen Quantum Optoelectronic Co., Limited | Private company limited by shares | Dissolved |
| Quantum Technology Co., Limited | Private company limited by shares | Live |
| Quantum Ant Technology Co., Limited | Private company limited by shares | Live |
| Quantum age Technology Co., Limited | Private company limited by shares | Live |
| Quantum ST Technology Co., Limited | Private company limited by shares | Live |
| Quantum Era Technology Co., Limited | Private company limited by shares | Live |
| QUANTUM TECHNOLOGY ASIA CO., LIMITED | Private company limited by shares | Live |
| Mongolian Quantum Trading Co., Limited | Private company limited by shares | Live |
| UK&HK QUANTUM TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| Quantum Steps Coaching & Consulting Limited | Private company limited by shares | Dissolved |
| QUANTUM COMM. NETWORKS LIMITED | Private company limited by shares | Live |
| Quantum Commercial Limited | Private company limited by shares | Live |
| Quantum Communication Company Limited | Private company limited by shares | Live |
| Quantum Communication Hong Kong Limited | Private company limited by shares | Live |
| QUANTUM COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| Quantum Communications (HK) Limited | Private company limited by shares | Live |
| QUANTUM CONCEPTS LIMITED | Private company limited by shares | Live |
| Quantum Connectivity Co., Limited | | Live |
| CONSORCIO QUANTUM SA LIMITED | Private company limited by shares | Live |
| QUANTUM INVESTMENT CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| QUANTUM LEAP CONSULTANTS & DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| QUANTUM ARC CONSULTATION LIMITED | Private company limited by shares | Live |
| QUANTUM CONSULTING LIMITED | | Live |
| QUANTUM CAPITAL AND CONSULTING LIMITED | Private company limited by shares | Live |
| QUANTUM MERUIT CONSULTING LIMITED | Private company limited by shares | Live |
| BAO SENG NEW QUANTUM (CONTINENTAL) LIMITED | Private company limited by shares | Live |
| Quantum Automatic Control Technique Co., Limited | Private company limited by shares | Live |
| QUANTUM CORPORATION LIMITED | Private company limited by shares | Dissolved |
| GRAND QUANTUM INVESTMENT CORPORATION LIMITED | Private company limited by shares | Live |
| Quantum Creations Limited | Private company limited by shares | Live |
| QUANTUM CREATIVES LIMITED | Private company limited by shares | Live |
| QUANTUM CROSS ENTERPRISE LIMITED | Private company limited by shares | Live |
| Quantum Cube Limited | | Live |
| QUANTUM CYBERTECH LIMITED | Private company limited by shares | Live |
| QUANTUM DANCE LIMITED | | Live |
| QUANTUM DATA SYSTEMS LIMITED | Private company limited by shares | Live |
| QUANTUM DESIGNS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| QUANTUM DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Quantum Development Limited | Private company limited by shares | Live |
| SJP HS Quantum Intelligent Development Shares Co., Limited | Private company limited by shares | Live |
| QUANTUM DEVELOPMENT (H.K.) LIMITED | Private company limited by shares | Dissolved |
| QUANTUM DYNAMIC HOLDING LIMITED | Private company limited by shares | Live |
| EAST QUANTUM CO., LIMITED | Private company limited by shares | Live |