| MILLENNIUM ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| MILLENNIUM ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| NANOVA ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ORIENTAL RICH ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ORKNEY ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Ozoglad Environmental Technology Limited | Private company limited by shares | Live |
| PARK RICH ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| POWER ELEPHANT ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| C & G Environmental Technology (Urban Projects) Limited | Private company limited by shares | Live |
| Pro-Tech Environmental Technology Limited | Private company limited by shares | Live |
| ANQEL ENVIRONMENTAL PROTECTION TECHNOLOGY DEVELOPING LIMITED | Private company limited by shares | Live |
| Bluestar Environmental Protection Technology Limited | Private company limited by shares | Live |
| CHINA WAH WAI ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| China Clean Environmental Protection Technology Limited | Private company limited by shares | Live |
| China Environmental Protection Technology Co., Limited | Private company limited by shares | Live |
| CHINA ENVIRONMENTAL PROTECTION TECHNOLOGY CORPORATION LIMITED | Private company limited by shares | Dissolved |
| NXF (China) Environmental Protection Technology Investment Limited | | Live |
| CHINA SPACE ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Fengdong Environmental Protection Technology Co., Limited | Private company limited by shares | Live |
| FORTUNE ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| GERMANY HANDELIN ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HK GREEN ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| GREEN ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Green Environmental Protection And Technology Group Limited | | Live |
| HUDI ENVIRONMENTAL PROTECTION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| Hk Jisen Intelligent Environmental Protection Technology Limited | Private company limited by shares | Live |
| JINQI ENVIRONMENTAL PROTECTION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| MOBOTEC ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| USA TAOSHISHUN ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| QIANLONG ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SKY RICH ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| DM ENVIRONMENTAL SCIENCE & TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI XUHE ENVIRONMENTAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Shewell Environmental Technology Co., Limited | Private company limited by shares | Live |
| SHYUAN-KUO ENVIRONMENTAL TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIWEI ENVIRONMENTAL TECHNOLOGY HOLDING LIMITED | Private company limited by shares | Live |
| SKYBRIGHT ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ENVIRONMENTAL SOLUTION TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| STAR LAKE COORDINATES ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SUCHUANG DUNHUA ENVIRONMENTAL TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| SUINIXING (CHINA) ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Sunking Environmental Technology Co., Limited | Private company limited by shares | Dissolved |
| Sunny Environmental Technology Co., Limited | | Live |
| SUNSHENG ENVIRONMENTAL TECHNOLOGY GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| HK CHONGXING TERRITORY ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| THOMSON ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Tianhe Environmental Technology Limited | | Live |
| HK TIANNING ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| T-SHINE ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| TUNG HIP ENVIRONMENTAL TECHNOLOGY LIMITED | | Live |
| TWINKLE ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UPSTAR ENVIRONMENTAL TECHNOLOGY CO., LIMITED | | Live |
| VITREO ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Plenty Wealth Environmental Technology Limited | Private company limited by shares | Live |
| Wego Environmental Technology Limited | Private company limited by shares | Dissolved |
| Well Clean Environmental Technology Limited | Private company limited by shares | Live |
| WINDSOR ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WING TAI ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Wintex Environmental Technology Limited | Private company limited by shares | Live |
| HK XUNYAN ENVIRONMENTAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| YIWAN Environmental Technology (HK) Limited | | Live |
| Youcheng Environmental Technology (Hong Kong) Limited | | Live |
| Yuzhang Environmental Technology Co. , Limited | Private company limited by shares | Live |
| Zhanda Environmental Technology (Hong Kong) Limited | Private company limited by shares | Live |
| ZHONGGANG ENVIRONMENTAL TECHNOLOGY (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| HANWANG ZHONGXING ENVIRONMENTAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| TELFORD ENVIRONMENTAL RESOURCE LIMITED | Private company limited by shares | Live |
| TELFORD ENVIRONMENTAL SERVICE LIMITED | Private company limited by shares | Live |
| TERESA ENVIRONMENTAL (HOLDING) GROUP COMPANY, LIMITED | Private company limited by shares | Dissolved |
| TERS ENVIRONMENTAL (HOLDING) GROUP COMPANY, LIMITED | Private company limited by shares | Live |
| TESCO ENVIRONMENTAL PROTECTION (HK) CO., LIMITED | Private company limited by shares | Live |
| Tesselaar Environmental Solutions (HK) Limited | Private company limited by shares | Dissolved |
| Tesseract Environmental Group Limited | Private company limited by shares | Live |
| ASIA PACIFIC ENVIRONMENTAL TESTING COMPANY LIMITED | Private company limited by shares | Live |
| QUALITY ENVIRONMENTAL CERTIFICATION TESTING (CENTER) LIMITED | Private company limited by shares | Dissolved |
| Vibration and Environmental Testing Company Limited | Private company limited by shares | Live |
| KONG THAI (ASIA) ENVIRONMENTAL TRADING COMPANY LIMITED | Private company limited by shares | Live |
| TIANE ENVIRONMENTAL CO., LIMITED | Private company limited by shares | Live |
| Yorkshire Environmental Timber Limited | Private company limited by shares | Live |
| TioStone Environmental Limited | Private company limited by shares | Live |
| TONGJIANG ENVIRONMENTAL CO., LIMITED | Private company limited by shares | Dissolved |
| TOPARCH ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| HON MAN ENVIRONMENTAL TRADING COMPANY LIMITED | Private company limited by shares | Live |
| JIA HUA ENVIRONMENTAL TRADING LIMITED | | Live |
| HAO SI ENVIRONMENTAL TRADING LIMITED | | Live |
| ENVIRONMENTAL DRAGON TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ENVIRONMENTAL MASTER INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| Ying Tat Metal Plastic Environmental Trading Company Limited | Private company limited by shares | Live |
| Li Yuen Environmental Trading Company Limited | | Live |
| QUALITY & ENVIRONMENTAL CERTIFICATION TRAINING LIMITED | Private company limited by shares | Dissolved |
| Yee Kee Environmental Transport Limited | Private company limited by shares | Live |
| Yiu Kee Environmental Transportation Limited | Private company limited by shares | Live |
| Ming Lee Environmental Transportation Co. Limited | Private company limited by shares | Live |
| Fu Tong Environmental Treatment Limited | Private company limited by shares | Live |
| Trigger Environmental Biological Technology Limited | Private company limited by shares | Dissolved |
| New Trillion Environmental Limited | Private company limited by shares | Live |
| TRINITY-ADVANCE (ENVIRONMENTAL) LIMITED | Private company limited by shares | Dissolved |
| TRUSTY ENVIRONMENTAL CO. LIMITED | Private company limited by shares | Live |
| SAI KUNG TSEUNG KWAN O ENVIRONMENTAL ASSOCIATION LIMITED | Company limited by guarantee | Live |
| TSUENYE ENVIRONMENTAL LIMITED | Private company limited by shares | Dissolved |