| ENVIRO-TEK HONG KONG LIMITED | Private company limited by shares | Dissolved |
| ENVIROTEK INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ENVIROTEQ PACIFIC LIMITED | Private company limited by shares | Live |
| ENVIROTEST LIMITED | Private company limited by shares | Dissolved |
| ENVIRO-TRADE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| EAST SEA ENVIRO-TRADE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ENVIROTREAT LIMITED | Private company limited by shares | Dissolved |
| ENVIRO-TROL LIMITED | Private company limited by shares | Dissolved |