| Prototype Creative Co. Limited | | Live |
| Prototype Design Company Limited | Private company limited by shares | Live |
| SPECIAL DESIGN (PROTOTYPE SERVICE) LIMITED | Private company limited by shares | Dissolved |
| Insight Prototype Co., Limited | | Live |
| 3A PROTOTYPE MANUFACTURING LIMITED | Private company limited by shares | Live |
| METALSTAR PROTOTYPE COMPANY LIMITED | Private company limited by shares | Live |
| HEXICONN MOLD & PROTOTYPE COMPANY LIMITED | Private company limited by shares | Live |
| Myth Prototype Limited | | Live |
| Prefect Goods Prototype Co., LIMITED | Private company limited by shares | Live |
| Leshine Rapid Prototype Co., Limited | Private company limited by shares | Live |
| SY laser Rapid Prototype Co., Limited | Private company limited by shares | Live |
| Metal Rapid Prototype CO., LIMITED | Private company limited by shares | Live |
| APA Rapid Prototype Technology Co., Limited | Private company limited by shares | Live |
| MAINSTREAM RAPID PROTOTYPE TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| SANWA ENGRAVE & PROTOTYPE COMPANY LIMITED | Private company limited by shares | Live |
| SENMEI PROTOTYPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Prototype Studio Limited | Private company limited by shares | Live |
| PROTOTYPE SYSTEM LIMITED | Private company limited by shares | Live |
| Unique Prototype Technology Co., Limited | Private company limited by shares | Live |
| WellSolid Prototype Limited | Private company limited by shares | Live |
| YOUDE PROTOTYPE LIMITED | Private company limited by shares | Live |
| Hua Zheng Prototype Technology Co., Limited | Private company limited by shares | Live |
| Prototype.com Limited | | Live |
| EXL PROTOTYPES LIMITED | | Live |
| INCO Prototypes Manufacturing Co., Limited | | Live |
| Besten Prototyping Manufacturing Limited | Private company limited by shares | Live |
| BORDERSUN PROTOTYPING LIMITED | Private company limited by shares | Live |
| HK GL PROTOTYPING CO., LIMITED | Private company limited by shares | Live |
| Artisan Prototyping and Tooling Co., Limited | Private company limited by shares | Live |
| JITA Pre-Series Prototyping Co., Limited | Private company limited by shares | Live |
| HK GUANGYUAN PROTOTYPING TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HK SKY PROTOTYPING AND TOOLING CO., LIMITED | Private company limited by shares | Live |
| SKY PROTOTYPING AND TOOLING CO., LIMITED | Private company limited by shares | Live |
| Guannuo Prototyping and Tooling Co., Limited | Private company limited by shares | Live |
| GAOFENG (HK) PROTOTYPING CO., LIMITED | Private company limited by shares | Live |
| KAIERWO (HK) PROTOTYPING LIMITED | Private company limited by shares | Live |
| HONG KONG GENTECH HARDWARE PROTOTYPING CO., LIMITED | Private company limited by shares | Live |
| Ideal Rapid Prototyping HongKong Limited | Private company limited by shares | Live |
| Hongkong YD Rapid Prototyping Co., Limited | Private company limited by shares | Live |
| CHESTER INTERNATIONAL PROTOTYPING AND TOOLING LIMITED | Private company limited by shares | Dissolved |
| LERTHREE PROTOTYPING CO., LIMITED | Private company limited by shares | Live |
| Pulse Prototyping Limited | Private company limited by shares | Live |
| 3E RAPID PROTOTYPING LIMITED | Private company limited by shares | Live |
| HAOSHENG RAPID PROTOTYPING CO., LIMITED | Private company limited by shares | Live |
| NANJING BEIQI RAPID PROTOTYPING CO., LIMITED | Private company limited by shares | Live |
| GOOD MARK RAPID PROTOTYPING CO., LIMITED | Private company limited by shares | Dissolved |
| RAPID PROTOTYPING GROUP LIMITED | Private company limited by shares | Live |
| LUXFORM RAPID PROTOTYPING CO. LIMITED | Private company limited by shares | Live |
| Triple-shift Mockup and Rapid Prototyping Manufactur Limited | Private company limited by shares | Live |
| WELEAD RAPID PROTOTYPING AND TOOLING LIMITED | Private company limited by shares | Live |
| PROTOXX LIMITED | Private company limited by shares | Live |
| Protoza Limited | Private company limited by shares | Live |
| Protozoa Trading Company Limited | Private company limited by shares | Live |
| PROTRADE COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROTRADE LIMITED | Private company limited by shares | Dissolved |
| PRO-TRADE LIMITED | Private company limited by shares | Live |
| TOP PROTRADE LIMITED | Private company limited by shares | Dissolved |
| PROTRADE & CONCEPTS LIMITED | Private company limited by shares | Dissolved |
| Protrade Investment Limited | Private company limited by shares | Live |
| Protrade Solutions Limited | Private company limited by shares | Live |
| ProTraders Limited | Private company limited by shares | Dissolved |
| Pro-Trading Communi HK Limited | Private company limited by shares | Live |
| PROTRAIN CHINA LIMITED | Private company limited by shares | Live |
| PROTRAK RACING LIMITED | Private company limited by shares | Dissolved |
| PRO-TRANS SERVICE LIMITED | Private company limited by shares | Live |
| ACE PROTRANS SHIPPING LIMITED | Private company limited by shares | Live |
| PROTREE INVESTMENT LIMITED | Private company limited by shares | Live |
| PRO-TREE PRODUCTS & ENGINEERING CO. LIMITED | Private company limited by shares | Live Commenced dormancy on 22-Mar-2005 |
| PRO-TREE PROJECTS CO. LIMITED | Private company limited by shares | Live |
| PROTREK COMPANY LIMITED | Private company limited by shares | Live |
| PRO-TRINITY SPORTS DEVELOPMENT LIMITED | Private company limited by shares | Live |
| PRO-TRIUMPH LIMITED | Private company limited by shares | Live |
| PROTRON LIMITED | Private company limited by shares | Dissolved |
| PROTROND LIMITED | Private company limited by shares | Dissolved |
| PROTRONIC LIMITED | Private company limited by shares | Live |
| PROTRONIC HK LIMITED | Private company limited by shares | Dissolved |
| PROTRONIC ASIA LIMITED | Private company limited by shares | Live |
| PROTRONIC ELECTRONICS LIMITED | Private company limited by shares | Live |
| PROTRONIC TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| PRO-TRONIC INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| PROTRONIC INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| NEWFINE PROTRONIC LIMITED | Private company limited by shares | Dissolved |
| PROTRONIC PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| PROTRONIC COMMUNICATION SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| PROTRONIC TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| PROTRONIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| PROTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| PROTRONICS INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| PROTRONICS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROTRONICS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| PROTRONICS TECHNOLOGIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROTRONICS TECHNOLOGY (SHENZHEN) LIMITED | Private company limited by shares | Live |
| PRO-TRONIX LIMITED | Private company limited by shares | Dissolved |
| PROTSOURCE (ASIA) LIMITED | Private company limited by shares | Live |
| PROTUTOR COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROTUTORS LIMITED | Private company limited by shares | Dissolved |
| KOREA PROTVEAGA COSMETICS (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| PROTYDENTAL LIMITED | Private company limited by shares | Live |
| PROTYRE CORP. LIMITED | Private company limited by shares | Dissolved |
| PROTYRE (HONG KONG) LIMITED | Private company limited by shares | Live |