| EcoTech Polymers Hong Kong Limited | Private company limited by shares | Live |
| ECOTECH RECYCLING LIMITED | Private company limited by shares | Live |
| OCEAN RESOURCE ECOTECH LIMITED | Private company limited by shares | Live |
| Sagacity Eco-Tech Co. Limited | Private company limited by shares | Live Commenced dormancy on 30-Mar-2016 |
| EcoTech Smart Limited | | Live |
| ECOTECH SOLUTIONS LIMITED | Private company limited by shares | Live |
| ECO-TECH SOLUTIONS LIMITED | | Live |
| Spring Fil Eco-Tech Company Limited | Private company limited by shares | Live |
| SPRING ECO-TECH LIMITED | Private company limited by shares | Live |
| ECOTECH PET STRAP LIMITED | Private company limited by shares | Live |
| SUNLIGHT ECO-TECH LIMITED | Private company limited by shares | Live |
| Surforce (Eco-tech) Limited | Private company limited by shares | Dissolved |
| SYNERJY ECOTECH CO., LIMITED | Private company limited by shares | Live |
| TENYE ECO-TECH CO., LIMITED | Private company limited by shares | Live |
| ECOTECH TRADING LIMITED | Private company limited by shares | Dissolved |
| ECOTECH (POTABLE WATER PIPE CLEANING) CO. LIMITED | Private company limited by shares | Dissolved |
| WISDOM ECO-TECH LIMITED | Private company limited by shares | Dissolved |
| WISE ECOTECH LIMITED | Private company limited by shares | Live |
| ECOTECH WORLDWIDE LIMITED | Private company limited by shares | Dissolved |
| FAN XIANG ECO-TECH COMPANY LIMITED | Private company limited by shares | Live |
| ZIAY ECO-TECH GROUP LIMITED | Private company limited by shares | Live |
| ECOTECHMINERALS LIMITED | Private company limited by shares | Live |
| ECOTECHNO HK LIMITED | Private company limited by shares | Live |
| Sky Eco-Technologies Limited | Private company limited by shares | Live |
| Aqua Clean Ecotechnology Limited | Private company limited by shares | Live |
| GLORY ECO-TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hkwctt Eco-technology Limited | Private company limited by shares | Live |
| Hoi Wah Ecotechnology & Innovation Co Limited | | Live |
| Fujian Minsan Eco-technology Co., Limited | Private company limited by shares | Live |
| AI Smart Eco-technology Limited | Private company limited by shares | Live |
| ABi ECOTECHNOLOGY TECNA LIMITED | Private company limited by shares | Live |