| KOSO (HK) INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| HONG KONG KOSO INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| KOSO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| KOSO Resources Limited | Private company limited by shares | Live |
| KOSON LIMITED | Private company limited by shares | Live |
| KOSONG LIMITED | Private company limited by shares | Dissolved |
| KOSONIC LIMITED | Private company limited by shares | Dissolved |
| KOSONIC ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| KOSONS COMPANY LIMITED | Private company limited by shares | Live |
| HK Kosor Technology Limited | | Live |
| GUANGZHOU KOSOUL INSTRUMENT LIMITED | Private company limited by shares | Live |