| PROST PHARMA (FRANCE) CO., LIMITED | | Live |
| Prost Trading (Hong Kong) Co., Limited | Private company limited by shares | Live |
| STRINGER PROST LIMITED | Private company limited by shares | Live |
| PROST TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| PROSTA ASIA LIMITED | Private company limited by shares | Live |
| PROSTALAR LIMITED | Private company limited by shares | Dissolved |
| PRO-STANDING TRADING LIMITED | Private company limited by shares | Live |
| PROSTAR COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROSTAR LIMITED | Private company limited by shares | Dissolved |
| PROSTAR LIMITED | Private company limited by shares | Live |
| Prostar LED Limited | Private company limited by shares | Live |
| PRO-STAR (ASIA) LIMITED | Private company limited by shares | Dissolved |
| BEST PROSTAR TRADE CO., LIMITED | Private company limited by shares | Live |
| PROSTAR ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| PROSTAR COMPONENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROSTAR ELECTRONICS LIMITED | Private company limited by shares | Live |
| PROSTAR ENGINEERING LIMITED | Private company limited by shares | Live |
| PROSTAR ENTERPRISES LIMITED | Private company limited by shares | Live |
| PROSTAR EXPORTS LIMITED | Private company limited by shares | Live |
| PROSTAR HONG KONG LIMITED | Private company limited by shares | Live |
| PRO-STAR INDUSTRIAL LIMITED | Private company limited by shares | Live Commenced dormancy on 08-Apr-2006 |
| PROSTAR INDUSTRIAL GROUP LIMITED | Private company limited by shares | Live |
| PRO-STAR INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| PRO-STAR INVESTMENTS LIMITED | Private company limited by shares | Live |
| PROSTAR JEWELRY COMPANY LIMITED | Private company limited by shares | Dissolved |
| PRO-STAR MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| PRO-STAR PRECISION LIMITED | Private company limited by shares | Dissolved |
| PRO-STAR PRODUCTIONS LIMITED | Private company limited by shares | Dissolved |
| PRO-STAR PROPERTIES LIMITED | Private company limited by shares | Live |
| PRO-STAR TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Prostar Technology Limited | Private company limited by shares | Live |
| PROSTAR TECHNOLOGY (ASIA) LIMITED | Private company limited by shares | Live |
| PROSTAR HONG KONG TRADE LIMITED | Private company limited by shares | Live |
| PROSTAR TRADING LIMITED | Private company limited by shares | Live |
| PROS-TARGET LIMITED | Private company limited by shares | Live |
| Hong Kong Center for Prostatic Diseases Limited | Private company limited by shares | Live |
| PROSTECH PETROLEUM ENGINEERING LIMITED | Private company limited by shares | Live |
| PROSTECH MICROELECTRONICS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ProStem China Limited | Private company limited by shares | Live |
| ProStemCell Limited | Private company limited by shares | Live |
| PROSTEN CAPITAL LIMITED | Private company limited by shares | Live |
| PROSTEN ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Prosten Finance Limited | Private company limited by shares | Live |
| PROSTEN TECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| PROSTEX LIMITED | Private company limited by shares | Live |
| PROSTEX HOLDING LIMITED | Private company limited by shares | Dissolved |
| Prosthodontics Center Limited | Private company limited by shares | Dissolved |
| Pong's Prosthodontics Centre Limited | | Live |
| Prosticks2.0 Limited | Private company limited by shares | Live |
| PROSTICKS.COM LIMITED | Private company limited by shares | Live |
| PROSTIME COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROSTON LIMITED | Private company limited by shares | Live |
| Proston Consulting Co., Limited | Private company limited by shares | Live |
| HONGKONG PROSTONE INDUSTRY LIMITED | Private company limited by shares | Live |
| NORTH PROSTOR LIMITED | Private company limited by shares | Dissolved |
| Pro-Strategy Consultation Limited | Private company limited by shares | Live |
| PROSTRIC LIMITED | Private company limited by shares | Live |
| ProStrike Limited | Private company limited by shares | Live |
| PROSTRONG LIMITED | Private company limited by shares | Dissolved |
| PROSTYLE LIMITED | Private company limited by shares | Dissolved |
| PRO-STYLE LIMITED | Private company limited by shares | Dissolved |