| CHINA QUALITY CONTROL SERVICE LIMITED | Private company limited by shares | Dissolved |
| China Quality Control Services Limited | Private company limited by shares | Live |
| QUALITY CONTROL CO-OPERATE LIMITED | Private company limited by shares | Live |
| GREEN ENERGY QUALITY CONTROL LIMITED | Private company limited by shares | Dissolved |
| EUROPEAN QUALITY CONTROL LIMITED | Private company limited by shares | Dissolved |
| EXPLORATION QUALITY CONTROL LIMITED | Private company limited by shares | Dissolved |
| FAME QUALITY CONTROL LIMITED | Private company limited by shares | Live |
| Halal Quality Control HK Limited | Private company limited by shares | Live |
| HARLEY QUALITY CONTROL COMPANY LIMITED | Private company limited by shares | Live |
| INSPECTION QUALITY CONTROL LIMITED | Private company limited by shares | Dissolved |
| U.S. QUALITY CONTROL SERVICE CENTER LIMITED | Private company limited by shares | Dissolved |
| SHINING TECH QUALITY CONTROL LIMITED | Private company limited by shares | Live |
| QUALITY CONTROL TEXTILES LIMITED | Private company limited by shares | Dissolved |
| VICTORIA QUALITY CONTROL LIMITED | Private company limited by shares | Live |
| RADAR PEST CONTROL LIMITED | Private company limited by shares | Live |
| NINGBO SANHENG REFRIGERATION CONTROL COMPANY LIMITED | Private company limited by shares | Live |
| CONTROL REGENT LIMITED | Private company limited by shares | Live |
| REMOTE CONTROL LIMITED | Private company limited by shares | Dissolved |
| GLOBAL REMOTE SMART CONTROL AGRICULTURAL GROUP CO., LIMITED | Private company limited by shares | Live |
| CDF REMOTE CONTROL MANUFACTURER LIMITED | Private company limited by shares | Live |
| Shanghai People's Remote Control Switch (HK) Co., Limited | | Live |
| FRANCE RENTOUMA WINE INDUSTRY HOLDING CONTROL GROUP LIMITED | Private company limited by shares | Dissolved |
| RISANTO REALTY CONTROL LIMITED | Private company limited by shares | Dissolved |
| RISK CONTROL COMPANY LIMITED | Private company limited by shares | Dissolved |
| CONTROL RISKS PACIFIC LIMITED | Private company limited by shares | Live |
| RUISHENG CONTROL CO., LIMITED | Private company limited by shares | Live |
| EIR CONTROL, S.A. LIMITED | Private company limited by shares | Live |
| RATEK SAFETY CONTROL LIMITED | Private company limited by shares | Live |
| Servimeca Sand Control SA. Limited | Private company limited by shares | Live |
| TUNG SANG TERMITE CONTROL LIMITED | Private company limited by shares | Live |
| COMPLETE SANITARY CONTROL SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| SANLIAN CONTROL SYSTEM (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| Sashas static control Limited | Private company limited by shares | Live |
| HONG KONG CONTROL SCIENCE & TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SCIENTIFIC CONTROL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| SECOND NATURE PEST CONTROL COMPANY LIMITED | Private company limited by shares | Live |
| SECURITY CONTROL LIMITED | Private company limited by shares | Live |
| China Security Control Company Limited | Private company limited by shares | Live |
| Malca-Amit Security Control Limited | Private company limited by shares | Dissolved |
| SEED CONTROL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SEIKE FLUID CONTROL LIMITED | Private company limited by shares | Live |
| Sensor Control Limited | Private company limited by shares | Live |
| SENY INTELLIGENT CONTROL LIMITED | Private company limited by shares | Live |
| HANG SHUN CLEANING AND PEST CONTROL SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| NEW POWER PEST CONTROL & CLEANING SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| L & D CONTROL & ENGINEERING SERVICES PTY LIMITED | Private company limited by shares | Dissolved |
| TECHNOLOGY CONTROL SERVICES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HUGO CLEANING & PEST CONTROL SERVICES COMPANY LIMITED | Private company limited by shares | Live |
| MITE CONTROL & CLEANING SERVICES COMPANY LIMITED | Private company limited by shares | Dissolved |
| Chi Kit Pest Control Services Limited | Private company limited by shares | Live |
| FSD PEST CONTROL SERVICES LIMITED | | Live |
| FLY KO CLEANING & PEST CONTROL SERVICES COMPANY LIMITED | Private company limited by shares | Live |
| WAN ON CLEANING & PEST CONTROL SERVICES COMPANY LIMITED | Private company limited by shares | Live |
| CHUI LUK PEST CONTROL AND CLEANING SERVICES COMPANY LIMITED | Private company limited by shares | Live |
| EASY CLEANING AND PEST CONTROL SERVICES LIMITED | Private company limited by shares | Live |
| Creative Pest Control Services Limited | Private company limited by shares | Live |
| EXCELLENT PEST CONTROL SERVICES LIMITED | Private company limited by shares | Live |
| MEMORY PEST CONTROL SERVICES LIMITED | | Live |
| Precision Pest Control Services Limited | Private company limited by shares | Live |
| Wing Kai Pest Control Services Limited | Private company limited by shares | Live |
| QUALITY CONTROL PRODUCT SERVICES LIMITED | Private company limited by shares | Dissolved |
| PRUDENT PEST CONTROL SERVICES CO LIMITED | Private company limited by shares | Dissolved |
| QUALITY CONTROL SERVICES LIMITED | Private company limited by shares | Live |
| British Quality Assurance Quality Control Services Limited | Private company limited by shares | Dissolved |
| QUALITY CONTROL SERVICES (HOLDINGS) LIMITED | Private company limited by shares | Live |
| PACIFIC QUALITY CONTROL SERVICES LIMITED | Private company limited by shares | Dissolved |
| Regent Pest Control Services Limited | Private company limited by shares | Live |
| SANWA PEST CONTROL SERVICES LIMITED | Private company limited by shares | Live |
| New Sanwa Pest Control Services Limited | | Live |
| CONTROL AND SOURCING SERVICES LIMITED | Private company limited by shares | Live |
| STATIC CONTROL SERVICES (ASIA) LIMITED | Private company limited by shares | Dissolved |
| SWAN PEST CONTROL SERVICES LIMITED | Private company limited by shares | Live |
| TERMITE CONTROL SERVICES LIMITED | Private company limited by shares | Live |
| ULTRA PEST CONTROL SERVICES LIMITED | Private company limited by shares | Dissolved |
| SEVERIN QUALITY CONTROL LIMITED | Private company limited by shares | Dissolved |
| SHANG HAI PEOPLE INDUSTRY CONTROL LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI PEOPLE CONTROL ELECTRIC CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI PEOPLE ELECTRIC CONTROL LIMITED | Private company limited by shares | Live |
| SHANGHAI QUALITY CONTROL CHN LIMITED | Private company limited by shares | Live |
| GERMANY HLN ELECTRIC CONTROL SHARE LIMITED | Private company limited by shares | Live |
| SHARP CONTROL LIMITED | Private company limited by shares | Live |
| GERMANY SHENGXIN NUMERICAL CONTROL TECHNOLOGY (HONGKONG) LIMITED | Private company limited by shares | Live |
| SHENYANG NUMERICAL CONTROL LATHE LIMITED | Private company limited by shares | Live |
| SHIHE CONTROL ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| SHING HING CONTROL SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| BSC Barkemeyer Shipmotion Control Limited | Private company limited by shares | Dissolved |
| HONG KONG SHOUXIN CONTROL EQUIPMENT CO., LIMITED | Private company limited by shares | Dissolved |
| Sihu Flow Control (H.K.) Company Limited | Private company limited by shares | Live |
| Sincere Hygiene & Pest Control Co. Limited | Private company limited by shares | Live |
| Lai Sing Pest Control Limited | Private company limited by shares | Live |
| SINO CONTROL LIMITED | Private company limited by shares | Dissolved |
| CONTROL SMART LIMITED | Private company limited by shares | Dissolved |
| SMART CONTROL LIMITED | Private company limited by shares | Live |
| SMART CONTROL LIMITED | Private company limited by shares | Live |
| Longtech Smart Control Limited | | Live |
| SMARTECH CONTROL SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| HK SMARTEST MEASUREMENT & CONTROL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UK JIANGTU SMOKE CONTROL TECHNOLOGY INTERNATIONAL PUBLIC LIMITED | Private company limited by shares | Live |
| AMERICAN SNNA PROCESS CONTROL GROUP (HK) CORP. LIMITED | Private company limited by shares | Dissolved |
| FLUID-STRUCTURE-SOUND INTERACTIONS AND CONTROL SOCIETY LIMITED -THE- | Company limited by guarantee | Live |