| ECOTEC LIMITED | Private company limited by shares | Dissolved |
| ECOTEC LIMITED | Private company limited by shares | Live |
| ECOTEC HK LIMITED | Private company limited by shares | Live |
| ECOTEC ASIA LIMITED | Private company limited by shares | Dissolved |
| ECO-TEC NONWOVEN LIMITED | Private company limited by shares | Live |
| EcoTec Projects Limited | Private company limited by shares | Live |
| Ecotec Resources Limited | | Live |
| ECOTEC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ECO-TECH CO. LIMITED | Private company limited by shares | Dissolved |
| ECOTECH LIMITED | Private company limited by shares | Dissolved |
| ECOTECH LIMITED | Private company limited by shares | Live |
| Ecotech GP Limited | Private company limited by shares | Live |
| PBM ECOTECH HK LIMITED | Private company limited by shares | Live |
| 3G Ecotech Limited | Private company limited by shares | Live |
| ECOTECH ALLIANCE LIMITED | Private company limited by shares | Live |
| ALLIANCE ECO-TECH LIMITED | Private company limited by shares | Live |
| GREEN ALLIANCE ECOTECH LIMITED | Private company limited by shares | Live |
| Aurum Eco-Tech Limited | Private company limited by shares | Live |
| Juyuan Auto Ecotech (Hongkong) Limited | Private company limited by shares | Live |
| Baguio EcoTech Limited | Private company limited by shares | Live |
| ECOTECH DESIGN BUILD.ASIA LIMITED | Private company limited by shares | Live |
| ECOTECH BUILDING MATERIAL LIMITED | | Live |
| Carrier Eco-tech Company Limited | Private company limited by shares | Live |
| ECOTECH CHEMICAL (H.K.) LIMITED | Private company limited by shares | Live |
| ECOTECH CHINA LIMITED | Private company limited by shares | Live |
| CHINA ECOTECH LIMITED | Private company limited by shares | Live |
| CHNNO CHINA ECO-TECH LIMITED | Private company limited by shares | Dissolved |
| BORIT ECOTECH CO., LIMITED | Private company limited by shares | Live |
| Ecotech Electrical Co., Limited | Private company limited by shares | Live |
| GERMANY AQSEN ECOTECH CO., LIMITED | Private company limited by shares | Live |
| NINGBO GREENVIRO ECOTECH CO., LIMITED | Private company limited by shares | Live |
| SUNSEMI ECOTECH CO., LIMITED | Private company limited by shares | Live |
| ECOTECH AND CONCEPTS LIMITED | Private company limited by shares | Live |
| Ecotech And Concepts Construction Limited | | Live |
| ECOTECH CORPORATION LIMITED | Private company limited by shares | Live |
| EcoTech Creative Company Limited | Private company limited by shares | Live |
| ECOTECH DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Live |
| ECOTECH CHINA DISTRIBUTION LIMITED | Private company limited by shares | Live |
| ECOTECH ELECTRONICS TEC CO., LIMITED | Private company limited by shares | Live |
| ECOTECH Refrigeration & Energy Systems HKG Limited | Private company limited by shares | Dissolved |
| ECOTECH ENGINEERING LIMITED | Private company limited by shares | Live |
| ECOTECH ARCHITECTURAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| EcoTech System Engineering Limited | | Live |
| Ecotech Environment Limited | Private company limited by shares | Live |
| EcoTech Environment Management Limited | Private company limited by shares | Live |
| EcoTech Environmental Limited | | Live |
| ECOTECH ENVIRONMENTAL PROTECTION (HONG KONG) LIMITED | Private company limited by shares | Live |
| Ecotech Environmental Technology Limited | Private company limited by shares | Live |
| EVERGAIN ECO-TECH LIMITED | Private company limited by shares | Dissolved |
| Fian Eco-Tech Limited | Private company limited by shares | Live |
| WIN GLORY ECO-TECH LIMITED | Private company limited by shares | Live |
| Gobi EcoTech Limited | Private company limited by shares | Dissolved |
| GREEN ECO-TECH SOLUTIONS LIMITED | Private company limited by shares | Live |
| GreeN-able Ecotech Limited | | Live |
| GreenGood Eco-Tech Co. Limited | Private company limited by shares | Live |
| ECOTECH GROUP LIMITED | Private company limited by shares | Dissolved |
| AGERANI ECOTECH GROUP LIMITED | Private company limited by shares | Live |
| GREATER BAY AREA ECOTECH (GROUP) LIMITED | Private company limited by shares | Live |
| KENNETH ECOTECH GROUP LIMITED | Private company limited by shares | Live |
| EcoTech Pacific Group Limited | Private company limited by shares | Live |
| Wiselife EcoTech Group Limited | Private company limited by shares | Live |
| KQ ECO-TECH (GUANG DONG) COMPANY LIMITED | Private company limited by shares | Live |
| Guangzhou Umeier Ecotech Co., Limited | | Live |
| ECOTECH HEALTHCARE LIMITED | Private company limited by shares | Dissolved |
| ECOTECH (HK) LIMITED | Private company limited by shares | Live |
| HNA ECOTECH (HK) CO. LIMITED | Private company limited by shares | Live |
| ECOTECH AIR-CONDITIONING (HK) LIMITED | Private company limited by shares | Live |
| BESURE (HK) ECOTECH CO., LIMITED | Private company limited by shares | Live |
| GLORY (HK) ECOTECH LIMITED | Private company limited by shares | Live |
| N.S.B.D. iFactors Eco-Tech (HK) Limited | Private company limited by shares | Dissolved |
| EcoTech (HK) EnviroProtect Technology Limited | | Live |
| INNOVATIVE ECO-TECH AND ENERGY (HOLDINGS) LIMITED | Private company limited by shares | Dissolved |
| Global Ecotech Holdings Group Limited | Private company limited by shares | Live |
| HONG TAI ECOTECH COMPANY LIMITED | Private company limited by shares | Live |
| HONG KONG ECOTECH LIMITED | Private company limited by shares | Live |
| MG EcoTech (Hong Kong) Limited | Private company limited by shares | Dissolved |
| DGI ECO-TECH (HONG KONG) LIMITED | Private company limited by shares | Live |
| Styx Ecotech (Hong Kong) Limited | | Live |
| HONGKONG WING FUNG ECO-TECH COMPANY LIMITED | Private company limited by shares | Live |
| Hydro Ecotech Limited | Private company limited by shares | Live |
| ECOTECH INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| Eco-Tech Industries (International) Limited | Private company limited by shares | Live |
| Ecotech Industry Limited | Private company limited by shares | Live |
| INHOYA ECOTECH CO., LIMITED | Private company limited by shares | Live |
| INNOVA ECOTECH INDUSTRIAL LIMITED | Private company limited by shares | Live |
| ECOTECH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Bonsin Eco-tech International Limited | Private company limited by shares | Dissolved |
| EARTHCARE ECOTECH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ECOTECH INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| ECOTECH INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Dissolved |
| INFINIERGY ECOTECH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ECOTECH REGENERGY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| EcoTech International Science & Technology Limited | Private company limited by shares | Live |
| THERMALIN INTERNATIONAL ECOTECH LIMITED | Private company limited by shares | Dissolved |
| ECOTECH INVESTMENT LIMITED | Private company limited by shares | Live |
| JAPAN ECOTECH LIMITED | Private company limited by shares | Live |
| JIALONG ECO-TECH DEVELOPMENT CO., LIMITED | Private company limited by shares | Dissolved |
| TIM WAI ECOTECH J.V. FOOD WASTE TREATMENT SERVICES LIMITED | Private company limited by shares | Dissolved |
| KAICHENG ECO-TECH (ASIA) COMPANY LIMITED | Private company limited by shares | Live |
| ECOTECH LIGHTING SOLUTION LIMITED | Private company limited by shares | Live |