| 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 |
| EXCEL CONTROL & INSTRUMENT (HK) LIMITED | Private company limited by shares | Live |
| FUTURE MEASURE & CONTROL INSTRUMENT CO., LIMITED | Private company limited by shares | Live |
| HANATA INSTRUMENT AND CONTROL LIMITED | Private company limited by shares | Dissolved |
| GPM Instrumentacion y Control Limited | Private company limited by shares | Live |
| INTEGRATED CONTROL SYSTEM LIMITED | Private company limited by shares | Dissolved |
| CHINA ANLIAN INTELLIGENCE CONTROL GROUP LIMITED | Private company limited by shares | Live |
| Unite Intelligence Control Co., Limited | Private company limited by shares | Live |
| INTER CONTROL HOPE LIMITED | Private company limited by shares | Live |
| INTER CONTROL PACIFIC LIMITED | Private company limited by shares | Live |
| OPTIMISE INTERNAL CONTROL LIMITED | Private company limited by shares | Live |
| MJ CONTROL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Allied Control International Limited | Private company limited by shares | Live |
| BARON INTERNATIONAL CONTROL SYSTEM LIMITED | Private company limited by shares | Dissolved |
| CHINA CONTROL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| China Control International Group Co., Limited | Private company limited by shares | Live |
| Global Control International Consulting Limited | Private company limited by shares | Live |
| CORROSION CONTROL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CORROSION CONTROL INTERNATIONAL ASIA LIMITED | Private company limited by shares | Dissolved |
| DESN Flow Control (International) Company Limited | Private company limited by shares | Live |
| DIVERSIFIED CONTROL SYSTEMS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINA INTERNATIONAL MICROENVIRONMENT CONTROL ENGINEERING LIMITED | Private company limited by shares | Live |
| INTERNATIONAL YINYAN COMPUTER CONTROL ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| NAUTILUS INTERNATIONAL CONTROL & ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| TYCO INTERNATIONAL FLOW CONTROL CO., LIMITED | Private company limited by shares | Live |
| H&G FLOW CONTROL INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| MOK'S INTERNATIONAL GOLD CONTROL LIMITED | | Live |
| GREAT CONTROL INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| CONTROL INTERNATIONAL GROUP CO., LIMITED | Private company limited by shares | Live |
| DATAC CONTROL INTERNATIONAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| Hong Kong Control Energy International Limited | Private company limited by shares | Live |
| Hong Kong Wise Control International Limited | Private company limited by shares | Dissolved |
| SUPER CONTROL INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| VG INDUSTRIAL CONTROL SYSTEMS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| International Infection Control Limited | Private company limited by shares | Live |
| H&T INTELLIGENT CONTROL INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| INTERNATIONAL UNARMED CONTROL TECHNOLOGY LEAGUE LIMITED | Private company limited by shares | Live |
| MAIN CONTROL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL CONTROL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| INTERNATIONAL FUMIGATION AND PEST CONTROL COMPANY LIMITED | Private company limited by shares | Dissolved |
| GALAXY INTERNATIONAL PEST CONTROL LIMITED | Private company limited by shares | Live |
| PIPELINE POLLUTION AND CONTROL (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| POWER CONTROL INTERNATIONAL LIMITED | | Live |