| RADIOLAN HONG KONG LIMITED | Private company limited by shares | Dissolved |
| RADIOLOCATION LIMITED | Private company limited by shares | Live |
| SWJ RADIOLOGY LIMITED | Private company limited by shares | Live |
| JL Radiology Limited | Private company limited by shares | Live |
| AW RADIOLOGY LIMITED | | Live |
| ADVANCED RADIOLOGY LIMITED | Private company limited by shares | Live |
| Radiology Associates Limited | Private company limited by shares | Live |
| PMU DIAGNOSTIC RADIOLOGY LIMITED | Private company limited by shares | Live |
| PAN PACIFIC RADIOLOGY GROUP LIMITED -THE- | Private company limited by shares | Live |
| PRESTIGE DIAGNOSTIC RADIOLOGY LIMITED | Private company limited by shares | Live |
| TS Radiology Service Limited | | Live |
| UNITED ONE DIAGNOSTIC RADIOLOGY LIMITED | Private company limited by shares | Live |
| Radiometer HK Limited | Private company limited by shares | Live |
| RADIONIC HONG KONG LIMITED | Private company limited by shares | Dissolved |
| RADIOREPUBLIC.COM LIMITED | Private company limited by shares | Dissolved |
| SAM RADIOS LIMITED | Private company limited by shares | Live |
| RADIOTECH Limited | Private company limited by shares | Live |
| EASTERN RADIOTECH LIMITED | Private company limited by shares | Live |
| RADIOTECH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| BOCOM RADIOTECH (HK) LIMITED | Private company limited by shares | Dissolved |
| RADIOTEX INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Hong Kong Superficial Radiotherapy Centre Limited | Private company limited by shares | Live |
| RADIO-TONE COMPANY LIMITED | Private company limited by shares | Live |
| Radisense Limited | | Live |
| Radiserv Limited | Private company limited by shares | Live |
| RADISH LIMITED | Private company limited by shares | Live |
| RABBIT N RADISH INTERNATIONAL CO. LIMITED | Private company limited by shares | Live |
| Radish Technology Limited | Private company limited by shares | Live |
| Radision Technology Limited | Private company limited by shares | Live |
| RADISSON LIMITED | Private company limited by shares | Dissolved |
| RADITRON COMPANY LIMITED | Private company limited by shares | Dissolved |
| RADIUM COMPANY, LIMITED | Private company limited by shares | Dissolved |
| RADIUM RAY LIMITED | Private company limited by shares | Live |
| Radium Atoms Limited | Private company limited by shares | Live |
| Radium Electronics Co., Limited | Private company limited by shares | Live |
| RADIUM CREATION LIMITED | Private company limited by shares | Live |
| Radium Engineering Company Limited | Private company limited by shares | Live |
| RADIUM GAMES LIMITED | Private company limited by shares | Live |
| RADIUM (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| RADIUS LIMITED | Private company limited by shares | Dissolved |
| RADIUS (ASIA) LIMITED | Private company limited by shares | Live |
| Radius Displays Limited | Private company limited by shares | Live |
| RADIUS ONLINE LIMITED | Private company limited by shares | Live |
| RADIX LIMITED | Private company limited by shares | Dissolved |
| GREEN RADIX Limited | | Live |
| RADIX TECHNOLOGY LIMITED | Private company limited by shares | Live |
| RADIX TELECOMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| RADIX TRADE LIMITED | | Live |