| Hong Kong Rich Environmental Co., Limited | Private company limited by shares | Live |
| HONG KONG DAXIN ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| HONG KONG BIJIASHENG ENVIRONMENTAL ART DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| AMA (HONG KONG) ENVIRONMENTAL ART DESIGN CO., LIMITED | Private company limited by shares | Live |
| DILIGENT (HONG KONG) ENVIRONMENTAL LIMITED | Private company limited by shares | Live |
| Association of Hong Kong Environmental Engineering Limited | Private company limited by shares | Live |
| HONG KONG SAI KEE ENVIRONMENTAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| HONG KONG ENVIRONMENTAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| HONG KONG PACIFIC ENVIRONMENTAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Environmental And Carbon Exchange Limited | Private company limited by shares | Live |
| Green Environmental Investment (Hong Kong) Limited | Private company limited by shares | Dissolved |
| GREEN POWER ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Green Environmental Technology Company Limited | | Live |
| SUN HING HONG ENVIRONMENTAL TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Hongtai Environmental Technology Limited | | Live |
| HONG KONG ENVIRONMENTAL INDUSTRY ASSOCIATION LIMITED | Company limited by guarantee | Live |
| HONG KONG INTELLIGENT ENVIRONMENTAL CO. LIMITED | Private company limited by shares | Live |
| LONG KE XIN ENVIRONMENTAL INVESTMENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| JINYUAN ENVIRONMENTAL TECHNOLOGY (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| KINGSFORD ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| 3R ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| SIN LOI ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG ENVIRONMENTAL LIMITED | Private company limited by shares | Dissolved |
| YU JIN ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ENVIRONMENTAL COMPANY OF HONG KONG LIMITED | Private company limited by shares | Live |
| HONG KONG YI FU ENVIRONMENTAL LIMITED | Private company limited by shares | Live |
| Mei Wah Environmental (Hong Kong) Company Limited | Private company limited by shares | Live |
| HONG KONG ENVIRONMENTAL LIMITED | Private company limited by shares | Live |
| GRN Environmental (Hong Kong) Limited | Private company limited by shares | Live |
| HONG KONG MEI DI ENVIRONMENTAL LIMITED | | Live |
| BIOTEK ENVIRONMENTAL SCIENCE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| LATINS ENVIRONMENTAL ART DESIGN (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Shui Fa Environmental Health (Hong Kong) Limited | Private company limited by shares | Live |
| NORTH MORNING ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SHUI HONG WAH (HONG KONG) ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WANG BROTHERS ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| Lesso Environmental Technology (Hong Kong) Limited | Private company limited by shares | Live |
| ENVIRONMENTAL LIGHTING (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| HONG KONG LUYOU ENVIRONMENTAL TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| Environmental Management Association of Hong Kong Limited -The- | Company limited by guarantee | Live |
| CAREMORE ENVIRONMENTAL MANAGEMENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG ENVIRONMENTAL MANAGEMENT LIMITED | Private company limited by shares | Live |
| ENVIRONMENTAL MANAGEMENT TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| NATURAL POWER ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| OWEN (HONG KONG) ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Dissolved |
| PAUL'S (HONG KONG) ENVIRONMENTAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Environmental People Association Limited | Private company limited by shares | Live |
| Hong Kong Plastic Environmental Plastic Limited | Private company limited by shares | Live |
| HONG KONG FU CHEONG ENVIRONMENTAL PRODUCTS LIMITED | Private company limited by shares | Live |
| J. P. ENVIRONMENTAL PRODUCTS (HONG KONG) LIMITED | Private company limited by shares | Live |
| ECI ENVIRONMENTAL PRODUCTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Aireason Environmental Protection Limited | Private company limited by shares | Live |
| HONG KONG CHOICER ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| HONG KONG FEDERATION OF ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| GLORY ENVIRONMENTAL PROTECTION (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG GUOXIN ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| NEW HONG KONG ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Dissolved |
| C&G Environmental Protection (Hong Kong) Company Limited | Private company limited by shares | Live |
| Hong Kong Hou Tat Environmental Protection Limited | Private company limited by shares | Live |
| Hong Kong Organic Environmental Protection Limited | Private company limited by shares | Live |
| RIGHT-SUN ENVIRONMENTAL PROTECTION (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG QSI TECHNOLOGY ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| HONG KONG AIR ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONG KONG AN DA ENVIRONMENTAL PROTECTION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Man Tung Environmental Protection (Hong Kong) Limited | Private company limited by shares | Live |
| HONG KONG ZHAO DA ENVIRONMENTAL PROTECTION LIMITED | Private company limited by shares | Live |
| HONG GUANG ENVIRONMENTAL RECYCLING LIMITED | Private company limited by shares | Live |
| Hong Kong Environmental and Recycling Limited | Private company limited by shares | Live |
| HONG KONG LIANCHUANG ENVIRONMENTAL RECYCLING LIMITED | Private company limited by shares | Live |
| HONG KONG ENVIRONMENTAL (GREEN) RESEARCH LIMITED | Private company limited by shares | Live |
| NEW POWER ENVIRONMENTAL RESOURCES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SADDIQ ENVIRONMENTAL SOLUTIONS (HONG KONG) LIMITED | Private company limited by shares | Live |
| SAMUEL ENVIRONMENTAL RESOURCES (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG ENVIRONMENTAL SCIENTECH LIMITED | Private company limited by shares | Dissolved |
| HONG KONG WEI MEI LI AN ENVIRONMENTAL SERVICE LIMITED | Private company limited by shares | Live |
| Hong Kong Environmental Social Governance Limited | | Live |
| HONG KONG STANDARD ENVIRONMENTAL INVESTMENT CO. LIMITED | Private company limited by shares | Dissolved |
| HONG KONG STANDARD ENVIRONMENTAL COMPANY LIMITED | Private company limited by shares | Live |
| DOW'S ENVIRONMENTAL TECH. (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG AOLIYUAN ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG ASIA ENVIRONMENTAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONG KONG EOK ENVIRONMENTAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| HONG KONG JUN YU ENVIRONMENTAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Dong Yue (Hong Kong) Environmental Technology Limited | Private company limited by shares | Live |
| Hong Kong Ba Fang Environmental Technology Limited | | Live |
| LAI HONG ENVIRONMENTAL TECHNOLOGY (HK) LIMITED | Private company limited by shares | Dissolved |
| HONG BAO ENVIRONMENTAL TECHNOLOGY (HK) CO. LIMITED | Private company limited by shares | Live |
| Kale Environmental Technology (Hong Kong) Limited | Private company limited by shares | Live |
| Hong Kong Environmental Technology Limited | Private company limited by shares | Live Commenced dormancy on 16-Jul-2012 |
| SPP ENVIRONMENTAL TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| CDT ENVIRONMENTAL TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| Ash environmental technology (Hong Kong) Limited | Private company limited by shares | Live |
| Hong Kong Mutual Environmental Technology Company Limited | Private company limited by shares | Live |
| Hong Kong Selvant Environmental Technology Company Limited | | Live |
| Hong Kong ShengRong Environmental Technology Limited | Private company limited by shares | Live |
| SONNE TECHNOLOGY ENVIRONMENTAL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Kin Wing Environmental Technology Limited | Private company limited by shares | Live |
| Xutong Environmental Technology Hong Kong LIMITED | Private company limited by shares | Live |
| Hong Kong Environmental & Testing Centre Limited | Private company limited by shares | Dissolved |
| TAI HING HONG ENVIRONMENTAL TRADING LIMITED | Private company limited by shares | Live |