| VATE (HK) CONTROL TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| TOTAL CONTROL TECHNOLOGY (HK) LIMITED | Private company limited by shares | Dissolved |
| United Control Group H.K. Limited | Private company limited by shares | Dissolved |
| VADE CONTROL (HK) LIMITED | Private company limited by shares | Live |
| HOLTER CONTROL VALVE (HK) CO., LIMITED | Private company limited by shares | Live |
| Paladon Valve Control (H.K.) Co., Limited | Private company limited by shares | Live |
| Ruishen (HK) Window Control Co., Limited | | Live |
| Wolfson Control Technology (HK) Co., Limited | Private company limited by shares | Live |
| YidLkang (HK) International Health Control Limited | Private company limited by shares | Live |
| Control Holdings Limited | Private company limited by shares | Live |
| Pro Control China Holdings Limited | | Live |
| First Control Enterprises Holdings Limited | Private company limited by shares | Live |
| FINE CONTROL HOLDINGS LIMITED | Private company limited by shares | Live |
| SOUTH CONTROL HOLDINGS (HONG KONG) LIMITED | Private company limited by shares | Live |
| STATIC CONTROL HOLDINGS LIMITED | Private company limited by shares | Live |
| SUCCESS CONTROL HOLDINGS LIMITED | Private company limited by shares | Live |
| TEAM CONTROL HOLDINGS LIMITED | Private company limited by shares | Live |
| CONTROL TOWER HOLDINGS LIMITED | Private company limited by shares | Live |
| WELL CONTROL HOLDINGS LIMITED | Private company limited by shares | Live |
| HOME OF LOVE PEST CONTROL LIMITED | Private company limited by shares | Live |
| ALXALEAGUE JINHAO DESERT CONTROL PROJECT (HONG KONG) CO., LIMITED | Private company limited by shares | Dissolved |
| ALXALEAGUE JINHAO DESERT CONTROL PROJECT (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| HONG KONG EAST ASIA (INTERNATIONAL) PEST CONTROL COMPANY LIMITED | Private company limited by shares | Live |
| Asset Control (Hong Kong) Limited | Private company limited by shares | Live |
| HONG KONG AUDLEY DIGITAL CONTROL EQUIPMENT LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Center For Disease Control And Prevention Limited | Private company limited by shares | Live |
| PACIFIC QUALITY CONTROL CENTER (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Mosquito Control Centre Limited | | Live |
| France Aircar Control System (Hong Kong) Co., Limited | Private company limited by shares | Dissolved |
| HONG KONG CHANGJIN AUTOMATIC CONTROL EQUIPMENT CO., LIMITED | Private company limited by shares | Live |
| Germany Dewitt Gate Control (Hong Kong) Co., Limited | Private company limited by shares | Live |
| EASTERN RESEARCH CONTROL (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| TRIUMPH FLOW CONTROL TECHNOLOGIES (HONG KONG) CO., LIMITED | Private company limited by shares | Dissolved |
| FLOWCO FLOW CONTROL SYSTEM (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| HONG KONG B&F FLUID CONTROL CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Elite Fluid Control Co., Limited | | Live |
| DOS'S CONTROL ENGINEERING (HONG KONG) CO., LIMITED | Private company limited by shares | Dissolved |
| NEW SPLENDOUR (HONG KONG) CONTROL INSTRUMENT CO., LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Chi Way Digital Control Machinery Co., Limited | Private company limited by shares | Live |
| Leader Measurement and Control (Hong Kong) Co., Limited | Private company limited by shares | Live |
| HONG KONG NAHI INTELLIGENT CONTROL CO., LIMITED | Private company limited by shares | Live |
| Hong Kong XinXing Door control co., Limited | Private company limited by shares | Live |
| HONG KONG KENUO QILIU CONTROL SYSTEM CO., LIMITED | Private company limited by shares | Live |
| VICTOR CONTROL SYSTEM (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Quanshengjia Intelligent Window Control System Co., Limited | Private company limited by shares | Live |
| Hong Kong Dongfeng Crown Gate Control Technology Co., Limited | Private company limited by shares | Live |
| Hong Kong weishengtai Intelligent Control Technology Co., Limited | Private company limited by shares | Live |
| Hong Kong xuyang Control Equipment Co., Limited | Private company limited by shares | Dissolved |
| Hong Kong Yuxin Intelligent Control Technology Co., Limited | | Live |
| CONTROL DATA (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG NEW STAR CROWN DOOR CONTROL CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Gaize Crown Door Control Co., Limited | Private company limited by shares | Live |
| Hong Kong Crown Door Control Technology Co., LIMITED | Private company limited by shares | Live |
| Hong Kong Crown Door Control Hardware Co., Limited | Private company limited by shares | Live |
| HONG KONG HAIDA (INTERNATIONAL) DOOR CONTROL HOLDINGS COMPANY LIMITED | Private company limited by shares | Live |
| Shanghai crown door control hardware (Hong Kong) Limited | Private company limited by shares | Live |
| Flight Control General Aviation (Hong Kong) Co. Limited | Private company limited by shares | Live |
| ART FLOW CONTROL (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| WEIR FLOW CONTROL (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG TONGTAI WORLD FORTUNE (CONTROL) GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| HONG KONG NEW SIGHT GOOD FIRE CONTROL CHEMICAL CO., LIMITED | Private company limited by shares | Dissolved |
| CUTEST (HONG KONG) INTERNATIONAL SHARE CONTROL GROUP COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Fengge Intelligent Control Technology Group Limited | | Live |
| Hong Kong Vision prevention and Control Institute Group Co., Limited | | Live |
| Hong Kong Cosette investment control group co., Limited | Private company limited by shares | Live |
| HONG KONG BAIJIA INTERNATIONAL INVESTMENT CONTROL GROUP LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Light Control Group Co., Limited | Private company limited by shares | Live |
| HAIF CONTROL HONG KONG CO LIMITED | Private company limited by shares | Live |
| Xinneng Intelligent Control (Hong Kong) Technology Investment Holdings Limited | | Live |
| LEI JIN HONG HOLLAND CONTROL LIMITED | Private company limited by shares | Live |
| HUADIAN (HONG KONG) MEASUREMENT CONTROL EQUIPMENT COMPANY LIMITED | Private company limited by shares | Live |
| BEST CONTROL INDUSTRIAL (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Laina Industrial Control Co., LIMITED | Private company limited by shares | Live |
| Hong Kong I Control Technology Industrial Co., Limited | Private company limited by shares | Dissolved |
| Hong Kong Hanfung Industrial Control Trading Limited | Private company limited by shares | Live |
| REYNOLDS INDUSTRIAL CONTROL (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG INSTITUTE OF PROJECT CONTROL ENGINEERS LIMITED -THE- | Company limited by guarantee | Dissolved |
| HONG KONG INTER- CONTROL SYSTEM LIMITED | Private company limited by shares | Dissolved |
| HONG KONG LONG CONTROL INVESTMENT LIMITED | Private company limited by shares | Live |
| Hong Kong Juncker Automation Equipment Control Limited | Private company limited by shares | Live |
| JZ CONTROL (HONG KONG) LIMITED | Private company limited by shares | Live |
| Hong Kong Bright View Electrical Control Technology Limited | Private company limited by shares | Live |
| HONG KONG BESTLOK AUTOMATIC CONTROL EQUIPMENT LIMITED | Private company limited by shares | Live |
| INVENSYS FLOW CONTROL (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG CLEANING PEST CONTROL SERVICES LIMITED | Private company limited by shares | Live |
| TIMES PEST CONTROL HONG KONG LIMITED | Private company limited by shares | Live |
| TIME CONTROL SYSTEMS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Yiosi Window Control Technology Limited | | Live |
| YONGLE AUTOMATION CONTROL (HONG KONG) LIMITED | Private company limited by shares | Live |
| BALLROOM DANCING BOARD OF CONTROL OF HONG KONG AND MACAU LIMITED | Company limited by guarantee | Dissolved |
| Microbial Control (Hong Kong) Limited | | Live |
| HONG KONG MOSQUITO CONTROL APPLIANCES CO. LIMITED | Private company limited by shares | Live |
| Newbo Control (Hong Kong) Limited | Private company limited by shares | Dissolved |
| CONTROL OPTICS HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Hong Wai Pest Control Company Limited | Private company limited by shares | Live |
| Hong Kong Pest Control Association Limited | | Live |
| P&E PEST CONTROL HONG KONG LIMITED | Private company limited by shares | Live |
| HONG KONG PHOENIX INTERNATIONAL INVESTMENT CONTROL LIMITED | Private company limited by shares | Dissolved |
| Rail Control Systems Hong Kong Limited | Private company limited by shares | Live |
| HONG KONG REMOTE CONTROL SPORTS ASSOCIATION LIMITED | Company limited by guarantee | Live |