| PROTEN LIMITED | Private company limited by shares | Dissolved |
| PROTEN LIMITED | Private company limited by shares | Live |
| PROTEN INC LIMITED | Private company limited by shares | Live |
| PROTEN DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Proten (Asia) System Engineering Company Limited | Private company limited by shares | Live |
| PRO-TEN Environmental Services Limited | Private company limited by shares | Live |
| PRO-TEN E-SYSTEM LIMITED | Private company limited by shares | Live |
| PROTEN INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| Proten (International) Limited | Private company limited by shares | Live |
| 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 |