| OZONE LIMITED | Private company limited by shares | Dissolved |
| O-Zone Limited | Private company limited by shares | Live |
| Ozone HK Limited | | Live |
| OZONE BROADWAY LIMITED | Private company limited by shares | Dissolved |
| OZONE CLINICS LIMITED | Private company limited by shares | Live |
| GD OZONE GENERATOR CO., LIMITED | Private company limited by shares | Live |
| Bnp Ozone Technology Co., Limited | Private company limited by shares | Live |
| Bnp Ozone Technology HK Co., Limited | Private company limited by shares | Live |
| OZONE COLLECTION LIMITED | Private company limited by shares | Dissolved |
| Ozone Consultancy Limited | | Live |
| O-Zone Consultant Limited | Private company limited by shares | Live |
| OZONE CONSULTING CO., LIMITED | Private company limited by shares | Live |
| OZONE DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Ozone Plus Development Limited | Private company limited by shares | Live |
| Ozone Engineering Limited | Private company limited by shares | Live |
| OZONE ENVIRONMENTAL HYGIENE LIMITED | Private company limited by shares | Dissolved |
| OZONE ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| OZONE GENERAL TRADING ESTABLISHMENT LIMITED | Private company limited by shares | Dissolved |
| OZONE FRAME GALLERY LIMITED | Private company limited by shares | Dissolved |
| OZONE GAMING LIMITED | Private company limited by shares | Live |
| Gigantic Ozone Energy Limited | Private company limited by shares | Live |
| OZONE GLASS DESIGN (CHINA) LIMITED | Private company limited by shares | Dissolved |
| OZONE GLASS DESIGN HONGKONG LIMITED | Private company limited by shares | Dissolved |
| OZONE GLOBAL LIMITED | | Live |
| BIOTEK OZONE HONG KONG LIMITED | Private company limited by shares | Live |
| OZONE RESOURCES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| OZONE INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Live |
| OZONE INDUSTRIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIA-PACIFIC (CHINA) OZONE TECHNOLOGY RESEARCH INSTITUTE LIMITED | Private company limited by shares | Live |
| OZONE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| OZONE INTERNATIONAL HK LIMITED | | Live |
| OZONE INTERNATIONAL (CHINA) LIMITED | Private company limited by shares | Live |
| OZONE EXIM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Ozone Industrial International Limited | Private company limited by shares | Live |
| Ozone International Trading (HK) Co., Limited | Private company limited by shares | Live |
| OZONE LIFE (HONG KONG) LIMITED | Private company limited by shares | Live |
| Ozone Supply Chain Management Limited | Private company limited by shares | Live |
| CHINESE MEDICAL OZONE ASSOCIATION LIMITED | Private company limited by shares | Live |
| CHINA MEDICAL OZONE ASSOCIATION LIMITED | Company limited by guarantee | Dissolved |
| CHINA MEDICAL OZONE ASSOCIATION LIMITED | Private company limited by shares | Live |
| OZONE OVERSEAS LIMITED | Private company limited by shares | Dissolved |
| World Medicine Technology and Ozone Practical Promotion Limited | Private company limited by shares | Live |
| OZONE TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| OZONE ELITE TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| Ozone Telecom Co., Limited | Private company limited by shares | Live |
| China Ozone Therapy Research Center Limited | Private company limited by shares | Live |
| Ozone World Environmental Co., Limited | Private company limited by shares | Live |
| OZONE WORLDWIDE (HK) LIMITED | Private company limited by shares | Live |
| OZONEFAC LIMITED | Private company limited by shares | Live |