| SYMMARK LIMITED | Private company limited by shares | Dissolved |
| Symmba Limited | Private company limited by shares | Live |
| Symmellion Management Consulting Limited | | Live |
| Symmetree Graphene Co., Limited | Private company limited by shares | Live |
| SYMMETREX LIMITED | Private company limited by shares | Live |
| SYMMETRIC INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYMMETRIC INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SYMMETRIC (MACAU) INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SYMMETRIC PROSPECT LIMITED | Private company limited by shares | Dissolved |
| SYMMETRIC SOLUTIONS LIMITED | Private company limited by shares | Live |
| SYMMETRICOM HONG KONG, LIMITED | Private company limited by shares | Dissolved |
| symmetriK Limited | Private company limited by shares | Live |
| SYMMETRY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SYMMETRY LIMITED | Private company limited by shares | Live |
| SYMMEX LIMITED | Private company limited by shares | Dissolved |