| 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 |
| XENA SECURITY LIMITED | Private company limited by shares | Live |
| SHENZHEN XINTAI SECURITY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| XTREM SECURITY LIMITED | Private company limited by shares | Live |
| XTREME SECURITY LIMITED | Private company limited by shares | Live |
| YING YUI SECURITY SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| Zeppa Security & Engineering Limited | Private company limited by shares | Live |
| ZHONGWIN SECURITY LIMITED | Private company limited by shares | Live |
| ZKTECO AND HST SECURITY SOLUTION LIMITED | Private company limited by shares | Live |
| RED ZONE SECURITY HK LIMITED | Private company limited by shares | Dissolved |
| LI ZONG SECURITY LIMITED | Private company limited by shares | Live |
| ZONG TUO SECURITY LIMITED | Private company limited by shares | Live |
| SECURITY-COLUMBIAN ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SECURITYPACK CO., LIMITED | Private company limited by shares | Live |
| SECURITYPRO LIMITED | Private company limited by shares | Live |
| SECURIX LIMITED | Private company limited by shares | Live |
| SECURMED LIMITED | Private company limited by shares | Live |
| SecurNtech Consulting Limited | Private company limited by shares | Live |
| Securo Limited | Private company limited by shares | Live |
| Securoseal Limited | Private company limited by shares | Dissolved |
| Securosys HK Limited | Private company limited by shares | Live |
| SECURSTAR LIMITED | Private company limited by shares | Live |
| SecurSys Limited | Private company limited by shares | Live |