| OSMA ELEVATOR (CHINA) CO., LIMITED | Private company limited by shares | Live |
| Osma Energy Group (USA) Co., Limited | Private company limited by shares | Live |
| OSMA CONSULTING LIMITED | Private company limited by shares | Live |
| Taiwan Osma Environmental Protection Group Co., Limited | Private company limited by shares | Live |
| HONGKONG OSMA LIMITED | Private company limited by shares | Live |
| OSMA WORLDWIDE LIMITED | Private company limited by shares | Live |
| OSMAC ENGINEERS LIMITED | Private company limited by shares | Live |
| OSMAN LIMITED | Private company limited by shares | Live |
| OSMAN COMPANY LIMITED | | Live |
| OSMANAMENA GROUP OF COMPANIES LIMITED | Private company limited by shares | Live |
| Osmaniye Trading Co., Limited | | Live |
| OSMANTHUS COMPANY LIMITED | Private company limited by shares | Live |
| CL Osmanthus I Limited | Private company limited by shares | Live |
| CL Osmanthus II Limited | Private company limited by shares | Live |
| CL Osmanthus III Limited | Private company limited by shares | Live |
| Osmanthus HK Limited | | Live |
| OSMAR TRADING LIMITED | Private company limited by shares | Live |
| OSmart Cleanse Limited | | Live |
| OSMART CO., LIMITED | Private company limited by shares | Live |
| OSMART (HK) INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| OSMART INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| OSMAS BRUSH TECHNOLOGY (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UK O-SMAY WATER PROCESSING TECHNIQUE EQUIPMENTS LIMITED | Private company limited by shares | Dissolved |