| R.O.I. Company Limited | | Live |
| Ro'i Consulting Limited | Private company limited by shares | Dissolved |
| RO'I REHAB LIMITED | Private company limited by shares | Live |
| GERMANY ROIBOW BREWERY EQUIPMENT (H.K.) LIMITED | Private company limited by shares | Dissolved |
| ROICKET (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| ROIG SPORTS LIMITED | Private company limited by shares | Dissolved |
| ROIKA COMPANY LIMITED | Private company limited by shares | Dissolved |
| Roikings Limited | Private company limited by shares | Live |
| ROILIWAY COMPANY LIMITED | Private company limited by shares | Dissolved |
| ROIMaster Limited | Private company limited by shares | Live |
| RoiMobs Limited | Private company limited by shares | Live |
| ROIPLUS CO., LIMITED | Private company limited by shares | Live |
| ROIRA BIOTECH LIMITED | Private company limited by shares | Live |
| ROIS Enterprises Limited | Private company limited by shares | Live |
| ROIS MASTER LIMITED | Private company limited by shares | Live |
| ROIS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| TROIS ROIS PRIVATE LIMITED | Private company limited by shares | Live |
| ROISSIEN LIMITED | Private company limited by shares | Dissolved |
| ROITECH LIMITED | Private company limited by shares | Dissolved |
| ROIVE LIMITED | Private company limited by shares | Live |