| PROTEN INVESTMENT LIMITED | Private company limited by shares | Live |
| LEGEND PROTEN LIMITED | Private company limited by shares | Live |
| PROTEN TRADING LIMITED | Private company limited by shares | Live |
| RHM PROTENA LIMITED | Private company limited by shares | Dissolved |
| PROTEND INTERNATIONAL LIMITED | Private company limited by shares | Live |
| PRO-TENT MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| PROTEOME LIMITED | | Live |
| PROTEOMEDICS LIMITED | Private company limited by shares | Dissolved |
| ProteoQuest Limited | | Live |
| PROTERCTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| PROTEST LIMITED | Private company limited by shares | Live |
| PROTESTANT PEOPLES' CHURCH LIMITED | Company limited by guarantee | Dissolved |
| Shanghai Protesting Nature Investment & Management Co. Limited | Private company limited by shares | Dissolved |
| PROTEUS LIMITED | Private company limited by shares | Dissolved |
| Proteus Limited | Private company limited by shares | Live |
| PROTEUS ELECTRIC LIMITED | Private company limited by shares | Live |
| PROTEUS GROUP LIMITED | Private company limited by shares | Live |
| Proteus Digital Health Asia Limited | Private company limited by shares | Live |
| PROTEUS HOLDING LIMITED | Private company limited by shares | Live |
| PROTEUS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| PROTEUS MARINE LIMITED | Private company limited by shares | Live |
| PROTEUS SHIPPING LIMITED | Private company limited by shares | Dissolved |
| PROTEUS SOLUTIONS LIMITED | Private company limited by shares | Live |
| PROTEUS SPORTS LIMITED | Private company limited by shares | Dissolved |
| VIRTUAL PROTEUS TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| PROTEUS TRADING HK LIMITED | Private company limited by shares | Live |
| PROTEUSASIA LIMITED | Private company limited by shares | Dissolved |
| Protevia (Hong Kong) Green Financial Holding Group Limited | Private company limited by shares | Live |
| PROTEX LIMITED | Private company limited by shares | Live |
| Protex Con Limited | Private company limited by shares | Live |
| PROTEX INC LIMITED | Private company limited by shares | Live |
| PROTEX AUTOMATION LIMITED | Private company limited by shares | Live |
| PROTEX ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| PROTEX INC. LIMITED | Private company limited by shares | Dissolved |
| Protex Point Limited | Private company limited by shares | Live |
| PROTEXIM LIMITED | Private company limited by shares | Dissolved |
| PRO-TEXTRA CO., LIMITED | Private company limited by shares | Live |
| PROTEXTRADE LIMITED | Private company limited by shares | Dissolved |