| Onsa Asia Holding Limited | Private company limited by shares | Live |
| HK ONSAATDAAN LIMITED | Private company limited by shares | Live |
| ONSAFE LIMITED | Private company limited by shares | Dissolved |
| ONSAFE (CHINA) LIMITED | Private company limited by shares | Dissolved |
| ONSAFE CONTAINER SERVICE LIMITED | Private company limited by shares | Dissolved |
| ONSAFE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ONSAFE TRADING LIMITED | Private company limited by shares | Dissolved |
| ONSALA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONSALE PLASTIC FACTORY LIMITED | Private company limited by shares | Dissolved |
| ONSALES COMPANY LIMITED | Private company limited by shares | Live |
| ONSAN LIMITED | Private company limited by shares | Dissolved |
| ONSANE LIMITED | Private company limited by shares | Dissolved |
| ONSANFANTA COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONSAN-TOWA COMPANY LIMITED | Private company limited by shares | Dissolved |
| OnSarang Presbyterian Church of Hong Kong Limited | Company limited by guarantee | Live |
| Onsavii Limited | Private company limited by shares | Live |