| BOS SECURITY SYSTEM CO. LIMITED | Private company limited by shares | Live |
| YH Security System Limited | | Live |
| ASIA SECURITY SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASC NIS (ASIA) SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| EASY SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| TIN LIK SECURITY SYSTEM (ENGINEERING) LIMITED | Private company limited by shares | Live |
| INTELLITECH (SECURITY SYSTEM) LIMITED | Private company limited by shares | Live |
| NIXON SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| PACIFIC SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| PECO SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| POLY SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| PROTECT-SYS Security System Limited | Private company limited by shares | Dissolved |
| SYSTEM SECURITY SOLUTIONS LIMITED | Private company limited by shares | Live |
| SUCCESS SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| Yuta Security System Limited | | Live |
| SYSTEMIC SECURITY SERVICE LIMITED | Private company limited by shares | Dissolved |
| SECURITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TOP WIN SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| A & D SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| DCS SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| VA Security Systems Co. Limited | Private company limited by shares | Live |
| DOCTOR A SECURITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| eBizAnywhere Security Systems Limited | Private company limited by shares | Dissolved |
| KONWEST SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| KA MING SECURITY SYSTEMS COMPANY LIMITED | Private company limited by shares | Live |
| SCANTECH SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| SOUNDIC SECURITY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| UNIFORCE SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| ON TARGET Security Solutions Limited | Private company limited by shares | Live |
| Taser Security H.K Company Limited | Private company limited by shares | Live |
| SMT Security Tech Limited | Private company limited by shares | Live |
| DIGITAL SECURITY TECH LIMITED | Private company limited by shares | Dissolved |
| Pacific Security Technologies Limited | Private company limited by shares | Live |
| PANDA SECURITY TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| RYAN SECURITY TECHNOLOGIES, LIMITED | Private company limited by shares | Live |
| SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ASA SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Security Technology Limited | Private company limited by shares | Live |
| STL SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ASP Security & Technology Limited | Private company limited by shares | Live |
| X.Y Security Technology Limited | Private company limited by shares | Live |
| WIN SUN SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ASIA SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ADVANCED SECURITY TECHNOLOGY (ASIA) LIMITED | Private company limited by shares | Dissolved |
| CREATIVE SECURITY TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 11-Mar-2010 |
| CREATIVE TECHNOLOGY SECURITY LIMITED | Private company limited by shares | Dissolved |
| WeRHere Cyber Security & Technology Limited | | Live |
| Security Technology Engineering Company LIMITED | Private company limited by shares | Live |
| GAMMON SECURITY & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Yatu Security & Technology Holding Limited | Private company limited by shares | Live |
| Internet Security Technology Company Limited | Private company limited by shares | Live |
| Jincheng Digital Security Technology Limited | | Live |
| MIRACLE SECURITY TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| 3D NETWORKS SECURITY AND TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| NINGBO TOLION SECURITY TECHNOLOGY COMPANY LIMITED | | Live |
| RC-ZHONGDUN SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SECUREPRO TECHNOLOGY SECURITY SYSTEM LIMITED | Private company limited by shares | Live |
| XJB SMART SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Tuobang Security Technology Limited | Private company limited by shares | Live |
| VIEW ONE SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Wingspan Network Security Technology Limited | | Live |
| TELECOMMUNICATIONS & SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| TIMES SECURITY COMPANY LIMITED | Private company limited by shares | Dissolved |
| TONWELL SECURITY LIMITED | Private company limited by shares | Live |
| TOTAL SECURITY COMPANY LIMITED | Private company limited by shares | Dissolved |
| TOTAL SECURITY CONSULTING LIMITED | Private company limited by shares | Live |
| Total Security Protection (APAC) Limited | | Live |
| SECURITY TRADING COMPANY LIMITED | Private company limited by shares | Live |
| KENKO SECURITY TRADING LIMITED | Private company limited by shares | Live |
| SECURITY TRAINING LIMITED | Private company limited by shares | Dissolved |
| 360 Security Training Limited | Private company limited by shares | Live |
| Cyber Security Training Company Limited | Private company limited by shares | Live |
| Security Training Protocols Limited | Private company limited by shares | Live |
| Cloud Transformation and Security Solutions Limited | Private company limited by shares | Live |
| CNT SECURITY ARMOURED TRANSPORTATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| GALAXY TREASURE SECURITY GROUP LIMITED | Private company limited by shares | Live |
| TRIPLE SECURITY LIMITED | Private company limited by shares | Live |
| TRIPOD SECURITY LIMITED | Private company limited by shares | Live |
| SECURITY UMBRELLA PVT LIMITED | Private company limited by shares | Dissolved |
| CHINA UNITED SECURITY LIMITED | Private company limited by shares | Live |
| UNITED SECURITY CORP., LIMITED | Private company limited by shares | Dissolved |
| UNITED SECURITY SOLUTIONS LIMITED | Private company limited by shares | Live |
| United Security Technologies Limited | Private company limited by shares | Live |
| VELEY SECURITY LIMITED | Private company limited by shares | Live |
| VIACAM SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| VIDEO SECURITY LIMITED | Private company limited by shares | Live |
| VIPRE SECURITY TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| Virtualization Security Limited | Private company limited by shares | Live |
| VIVO SECURITY & AUTOMATION LIMITED | Private company limited by shares | Live |
| Walok Security System Company Limited | Private company limited by shares | Live |
| WANJUN SECURITY LIMITED | Private company limited by shares | Live |
| WELLPOINT SECURITY & TELECOMMUNICATIONS LIMITED | Private company limited by shares | Live |
| WESTLINE SECURITY LIMITED | Private company limited by shares | Dissolved |
| WHIRLWIND SECURITY LIMITED | Private company limited by shares | Live |
| WIDELY SECURITY COMPANY LIMITED | Private company limited by shares | Dissolved |
| WING ON SECURITY COMPANY LIMITED | Private company limited by shares | Live |
| WISE SECURITY LIMITED | Private company limited by shares | Live |
| WONG'S BROTHERS SECURITY COMPANY LIMITED | Private company limited by shares | Dissolved |
| WORK SECURITY ELECTRONIC ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| WUFU SMART DIGITAL SECURITY LIMITED | Private company limited by shares | Live |