| ENVIROTEC LIMITED | Private company limited by shares | Dissolved |
| ENVIROTEC ASIA LIMITED | Private company limited by shares | Dissolved |
| ENVIRO-TEC CONSULTANTS H.K. LIMITED | Private company limited by shares | Dissolved |
| GUO FENG ENVIRO-TEC LIMITED | Private company limited by shares | Live |
| General Envirotec Limited | Private company limited by shares | Dissolved |
| NEW ENVIROTECH COMPANY LIMITED | Private company limited by shares | Live |
| ENVIROTECH LIMITED | Private company limited by shares | Dissolved |
| ENVIROTECH COMPANY LIMITED | Private company limited by shares | Live |
| BDP ENVIROTECH LIMITED | Private company limited by shares | Live |
| MEC Enviro-Tech Limited | Private company limited by shares | Live |
| SBD Envirotech Limited | Private company limited by shares | Live |
| RHT ENVIROTECH LIMITED | Private company limited by shares | Live |
| ALLIED ENVIROTECH LIMITED | Private company limited by shares | Live |
| AQUA ENVIROTECH INVESTMENT (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| ENVIROTECH ASIA LIMITED | Private company limited by shares | Dissolved |
| CP Envirotech (Asia) Pty Limited | Private company limited by shares | Dissolved |
| Envirotech Asia Pty Limited | Private company limited by shares | Dissolved |
| Avalon Envirotech Limited | Private company limited by shares | Live |
| CHEVALIER (ENVIROTECH) LIMITED | Private company limited by shares | Live |
| ENVIROTECH COMPANY (CHINA) LIMITED | Private company limited by shares | Dissolved |
| KEE (CHINA) ENVIRO-TECH LIMITED | Private company limited by shares | Live |
| ADVANCED ENVIROTECH (CHINA) LIMITED | Private company limited by shares | Dissolved |
| SUNLIGHT ENVIROTECH CO., LIMITED | Private company limited by shares | Live |
| ENVIROTECH DISTRIBUTION (HK) LIMITED | Private company limited by shares | Live |
| ENVIROTECH ELECTRIC FAR EAST LIMITED | Private company limited by shares | Dissolved |
| ECOSOON ENVIROTECH LIMITED | Private company limited by shares | Live |
| ENVIROTECH ENERGY SOLUTION PTY LIMITED | Private company limited by shares | Live |
| ENVIRO-TECH ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| EPTEK Envirotech (HK) Limited | Private company limited by shares | Live |
| FORTUNE ENVIROTECH LIMITED | Private company limited by shares | Dissolved |
| GENERAL ENVIROTECH LIMITED | Private company limited by shares | Live |
| HEALTH GIANT ENVIROTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| TOP GRACE ENVIRO-TECH (HOLDING) COMPANY LIMITED | Private company limited by shares | Dissolved |
| GREEN ENVIROTECH LIMITED | Private company limited by shares | Live |
| GREEN ROOTS ENVIRO-TECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| Santa Fe EnviroTech Group Limited | Private company limited by shares | Live |
| TAK HEUNG ENVIRO-TECH EQUIPMENT LIMITED | Private company limited by shares | Dissolved |
| WinGalore Hexon Envirotech Limited | Private company limited by shares | Live |
| ENVIRO-TECH (HOLDING) LIMITED | Private company limited by shares | Live |
| China Everbright Envirotech (Hong Kong) Limited | Private company limited by shares | Live |
| Global Envirotech Hong Kong Co., Limited | Private company limited by shares | Live |
| Hong Kong Power Link EnviroTech Limited | | Live |
| Hong Kong Swift Envirotech Limited | Private company limited by shares | Live |
| HONG KONG TELFORD ENVIROTECH GROUP LIMITED | Private company limited by shares | Live |
| United Envirotech (Hong Kong) Company Limited | Private company limited by shares | Live |
| ENVIROTECH INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| INSITU ENVIROTECH (HK) LIMITED | Private company limited by shares | Dissolved |
| ENVIROTECH INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ENVIROTECH INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| EnviroTech (International) Limited | Private company limited by shares | Live |
| JENIC ENVIRO-TECH LIMITED | Private company limited by shares | Dissolved |
| KETRON ENVIROTECH COMPANY LIMITED | Private company limited by shares | Live |
| Komate Envirotech Co., Limited | Private company limited by shares | Live |
| Logan Envirotech Limited | | Live |
| EnviroTech Management Limited | Private company limited by shares | Live |
| METRO ENVIROTECH LIMITED | Private company limited by shares | Live |
| NOVACORP ENVIROTECH LIMITED | Private company limited by shares | Live |
| OCEAN ENVIRO-TECH LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL ENVIROTECH GROUP LIMITED | Private company limited by shares | Live |
| 3E ENVIROTECH PRODUCTS (HK) COMPANY LIMITED | Private company limited by shares | Live |
| Santa Fe EnviroTech Limited | Private company limited by shares | Live |
| Sino-Apollo Envirotech (HK) Limited | Private company limited by shares | Live |
| ENVIRO-TECH SOLUTION COMPANY LIMITED | Private company limited by shares | Live |
| Sootable EnviroTech Limited | | Live |
| SOWSUN ENVIRO-TECH LIMITED | Private company limited by shares | Live |
| HP Telford Envirotech Group Limited | Private company limited by shares | Live |
| ENVIROTECH TRADING LIMITED | Private company limited by shares | Live |
| YIU TUNG (ENVIROTECH) LIMITED | Private company limited by shares | Dissolved |
| WONDERFUL ENVIRO-TECH LIMITED | Private company limited by shares | Dissolved |
| WOOD ENVIRO-TECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| Shin Yang Envirotech Co., Limited | Private company limited by shares | Live |
| ENVIROTECK COMPANY LIMITED | Private company limited by shares | Live |