| HONG KONG (SSM) ENERGY GROUP LIMITED | Private company limited by shares | Dissolved |
| S.S.M. INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| SSMBC LIMITED | Private company limited by shares | Live |
| SSMC LIMITED | Private company limited by shares | Live |
| HK SSMD Group (China) Co., Limited | Private company limited by shares | Live |
| SSME CO., LIMITED | Private company limited by shares | Live |
| SSMETAL MATERIALS CO., LIMITED | | Live |
| SSMG, Limited | Private company limited by shares | Live |
| SSMI LIMITED | Private company limited by shares | Live |
| SSMOVE HK LIMITED | Private company limited by shares | Live |