| Hamma Trading Limited | | Live |
| HAMMAN COMPANY LIMITED | Private company limited by shares | Live |
| Hamman Valves Limited | | Live |
| HAMMANS HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HAMMANS PACIFIC LIMITED | Private company limited by shares | Dissolved |
| HAMMAR INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Ham-Master Trading Company Limited | Private company limited by shares | Dissolved |
| HAMMAX (HONG KONG) LIMITED | Private company limited by shares | Live |
| HAMMAX TRADING LIMITED | Private company limited by shares | Live |