| Company Name | Type | Status |
|---|---|---|
| Prosto VC Limited | Live | |
| PROSTO TECHNIKA LIMITED | Live | |
| 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 |