| RAMU ELECTRIC (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| RAMUNIA INTERNATIONAL SERVICES LIMITED | Private company limited by shares | Live |
| RAMUS LIMITED | Private company limited by shares | Dissolved |
| RAMUS COMPUTER SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| RAMUS CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| RAMUS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ROYAL RAMUS LIMITED | | Live |
| RAMUS INFORMATION SYSTEMS LIMITED | Private company limited by shares | Live |