| HONG KONG DINGGE ELECTROMECHANICAL WINDOW CONTROL SYSTEM LIMITED | | Live |
| UT CONTROL SYSTEMS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Integrated Control Technology (Hong Kong) Limited | Private company limited by shares | Live |
| CONTROL TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Live |
| Hong Kong Dekan Termite Control Technology Limited | | Live |
| Tong Dai Control (Hong Kong) Limited | Private company limited by shares | Live |
| HONG KONG AEROSPACE SATELLITE TRACKING AND CONTROL LIMITED | Private company limited by shares | Live |
| Hong Kong Kai Fu Gold Control Trading Limited | Private company limited by shares | Live |
| Kim Control (Hong Kong) Trading Limited | Private company limited by shares | Live |
| TRICOLOR (HONG KONG) MEASURE AND CONTROL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| VALPRO CONTROL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SEWAGE & WASTE CONTROL HONG KONG LIMITED | Private company limited by shares | Live |
| Hong Kong Xiaoji Smart Control Limited | Private company limited by shares | Live |
| Hong Kong Vei Zimi International Health Control Limited | Private company limited by shares | Dissolved |
| BFLOWS CONTROL (HONGKONG) LIMITED | Private company limited by shares | Live |
| HONGKONG WEIPU CONTROL EQUIPMENT CO., LIMITED | Private company limited by shares | Dissolved |
| HongKong Easthigh Pests Control Co., Limited | Private company limited by shares | Live |
| HONGKONG TEKANG CONTROL EQUIPMENT CO., LIMITED | Private company limited by shares | Live |
| HONGKONG DAYU NUMERICAL CONTROL LIMITED | Private company limited by shares | Dissolved |
| DEREAL FLOW CONTROL HONGKONG LIMITED | Private company limited by shares | Live |
| HONGKONG EASTONE FLOW CONTROL CO., LIMITED | Private company limited by shares | Live |
| HONGKONG SIED ELECTRIC CONTROL LIMITED | Private company limited by shares | Dissolved |
| TYD Control Engineering (HongKong) Company Limited | Private company limited by shares | Live |
| HONGKONG SHENGDA AUTOMATIC CONTROL ENGINEERING LIMITED | Private company limited by shares | Live |
| VALOUR (HONGKONG) CONTROL ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| VALOUR (HONGKONG) CONTROL ENGINEERING CO., LIMITED | | Live |
| HONGKONG NEW CENTURY CONTROL EQUIPMENT COMPANY LIMITED | Private company limited by shares | Live |
| FANSHI MEASUREMENT AND CONTROL (HONGKONG) INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| FW FLOW CONTROL (HONGKONG) LIMITED | Private company limited by shares | Live |
| IVS FLOW CONTROL (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| SMART FLOW CONTROL (HONGKONG) LIMITED | Private company limited by shares | Live |
| HONGKONG HENGDA FLUID CONTROL LIMITED | Private company limited by shares | Live |
| HONGKONG CONTROL CIRCUIT GROUP LIMITED | Private company limited by shares | Live |
| Hongkong Youshi Group Control Limited | Private company limited by shares | Live |
| DURKEN HEARN FLOW CONTROL (HONGKONG) LIMITED | Private company limited by shares | Live |
| HONGKONG HONKI CONTROL SYSTEM CO., LIMITED | Private company limited by shares | Live |
| HONGKONG INFRATEK MEASUREMENT & CONTROL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HongKong ND Inspection & Control Solution Co., Limited | Private company limited by shares | Live |
| Keyva Control (HongKong) Limited | Private company limited by shares | Dissolved |
| HONGKONG INT'L CONTROL SMOKE LABORATORY LIMITED | Private company limited by shares | Live |
| MCVOLANCE CONTROL VALVES (HONGKONG) LIMITED | Private company limited by shares | Dissolved |
| HONGKONG JINGRUI MEASUREMENT AND CONTROL TECHNOLOGY LIMITED | | Live |
| Precision Control Medical (Hongkong) Co., Limited | Private company limited by shares | Live |
| HongKong Smart Control Limited | Private company limited by shares | Live |
| HONGKONG GOLDEN CONTROL SOFTWARE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HONGKONG TALENT GROUP (CONTROL STOCK) COMPANY LIMITED | Private company limited by shares | Live |
| TAYLOR (HONGKONG) FLOW CONTROL GROUP LIMITED | Private company limited by shares | Dissolved |
| HONGKONG OCEAN TEAM CONTROL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HongKong RuiYi Control TECH Co., Limited | | Live |
| HAN CONTROL TECHNOLOGY (HONGKONG) CO., LIMITED | Private company limited by shares | Dissolved |
| HAN CONTROL TECHNOLOGY (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| Derek (Hongkong) Control Technology Co., LIMITED | Private company limited by shares | Live |
| Ferguson Control Technology (HongKong) Co., Limited | Private company limited by shares | Live |
| HONGKONG LUX FLUID CONTROL TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| HONGKONG KAIERWEN MEASUREMENT CONTROL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNITED CONTROL (HONGKONG) LIMITED | Private company limited by shares | Live |
| Flow Wheeler Flow Control (HongKong) Co., Limited | Private company limited by shares | Live |
| YUNSIFENG STOCK CONTROL GROUP HONGKONG LIMITED | Private company limited by shares | Live |
| HOTEN CONTROL ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| HOUSING PEST CONTROL LIMITED | Private company limited by shares | Live |
| DADI HUATUO CONTROL OF DESERTIFICATION INVESTMENT LIMITED | Private company limited by shares | Live |
| HUIRONG GOLD CONTROL GROUP LIMITED | Private company limited by shares | Live |
| HUISHENG MEASUREMENT AND CONTROL TECHNOLOGY CO., LIMITED | | Live |
| HUMBLE CONTROL LIMITED | Private company limited by shares | Live |
| NATUREPRO HUMIDITY CONTROL SYSTEMS LIMITED | Private company limited by shares | Live |
| HYBRID CONTROL SYSTEM HK LIMITED | Private company limited by shares | Live |
| HK Hygiene & Pest Control Limited | Private company limited by shares | Live |
| HY-Q FREQUENCY CONTROL PRODUCTS (HK) LIMITED | Private company limited by shares | Dissolved |
| Calories Control Consult Incorporation Limited | Private company limited by shares | Live |
| CONTROL INDONESIA LIMITED | Private company limited by shares | Dissolved |
| MR. CONTROL INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Live |
| AMERICA EAST ASIA ANOW INDUSTRIAL CONTROL LIMITED | Private company limited by shares | Dissolved |
| People Electric Appliance (China) Industrial Control Co., Limited | Private company limited by shares | Live |
| Pekwell Industrial Control System (HK) Co., Limited | Private company limited by shares | Live |
| SHANGHAI PEOPLE INDUSTRIAL CONTROL (HK) CO., LIMITED | Private company limited by shares | Live |
| Japan Suketame Industrial Control (HK) Co., Limited | Private company limited by shares | Dissolved |
| Japan Suketame Industrial Control (HK) Co., Limited | Private company limited by shares | Live |
| WDIT INTELLIGENT CONTROL INDUSTRIAL INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| FULL CONTROL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| GERMANY LAKESTE INDUSTRIAL CONTROL LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI RENMIN INDUSTRIAL CONTROL GROUP (HK) CO., LIMITED | Private company limited by shares | Live |
| Shanghai Renmin Industrial Control Equipment (HK) Limited | | Live |
| FRANCE MELARILA LOW PRESSURE INDUSTRIAL CONTROL (TIAN JIN) LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI RENMIN INDUSTRIAL CONTROL MANUFACTURING (HK) LIMITED | Private company limited by shares | Live |
| INDUSTRIAL CONTROL SERVICE LIMITED | Private company limited by shares | Dissolved |
| TIME CONTROL INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| ZY INDUSTRY CONTROL TRADE CO., LIMITED | Private company limited by shares | Live |
| INDUSTRY RISK CONTROL LIMITED | Private company limited by shares | Live |
| Asia Pacific Alliance for the Control of Influenza (APACI) Limited | Company limited by guarantee | Live |
| HONG KONG LUCKY SECURITY AND FIRE CONTROL AND AUTOMOTIVE OIL INFORMATION SERVICES LIMITED | Private company limited by shares | Live |
| Hong Kong Infection Control World Information Limited | Private company limited by shares | Live |
| MANAGEMENT INFORMATION AND CONTROL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| CONTROL ENGINEERING AND INFORMATION SCIENCE RESEARCH ASSOCIATION LIMITED | Private company limited by shares | Live |
| CLEAN-WELL INSECT CONTROL SERVICE CO., LIMITED | Private company limited by shares | Dissolved |
| Insectkil Pest Control Management Limited | Private company limited by shares | Live |
| Quality Inspection Control Limited | Private company limited by shares | Live |
| INSPECTOR CONTROL INVESTMENT LIMITED | Private company limited by shares | Live |
| ASIA INTERNAL CONTROL INSTITUTE LIMITED | Private company limited by shares | Live |
| China Teenagers Children Myopia Prevention and Control Research Institute Limited | Private company limited by shares | Live |
| CONTROL SCIENTIFIC INSTRUMENT HK CO., LIMITED | Private company limited by shares | Live |