| ITS CAR ALARM LIMITED | Private company limited by shares | Live |
| BROTHER ALARM COMPANY LIMITED | Private company limited by shares | Live |
| SINUTEX BURGLAR ALARM COMPANY LIMITED | Private company limited by shares | Live |
| China Cyber Alarm Cartel Limited | Private company limited by shares | Live |
| CCTV Alarm Prevention Limited | Private company limited by shares | Live |
| CCTV alarm security system Limited | Private company limited by shares | Live |
| Top Alarm Co., Limited | Private company limited by shares | Live |
| CUSTOM CAR ALARM & HI-FI CO., LIMITED | Private company limited by shares | Dissolved |
| S. Y. ALARM CONTRACTORS COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELECTRONICS 2000 BURGLAR ALARM LIMITED | Private company limited by shares | Dissolved |
| ADT Alarm Monitoring Hong Kong Limited | Private company limited by shares | Live |
| PORTERLY ALARM SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| SMS ALARM ALERT PRIVATE LIMITED | Private company limited by shares | Live |
| ALARM PROTECT SYSTEM LIMITED | Private company limited by shares | Dissolved |
| WEB ALARM SYSTEM LIMITED | Private company limited by shares | Live |
| CNT ALARM SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| MYRON ALARM SYSTEMS COMPANY LIMITED | Private company limited by shares | Dissolved |
| FULLSEE VIDEO & ALARM SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| ALARMCOM LIMITED | Private company limited by shares | Dissolved |
| ALARM-GUARD SYSTEMS & ENGINEERING LIMITED | Private company limited by shares | Live |
| ALARMPRO LIMITED | Private company limited by shares | Live |
| JOHNSON BURGLAR ALARMS COMPANY LIMITED | Private company limited by shares | Live |
| GUARDWAY ALARMS COMPANY LIMITED | Private company limited by shares | Live |
| PROTECT ALARMS LIMITED | Private company limited by shares | Dissolved |
| SAFEWAY ALARMS LIMITED | Private company limited by shares | Dissolved |
| TAC CAR ALARMS AND AUDIO SPECIALISTS LIMITED | Private company limited by shares | Live |
| ALARMVIP HIGH TECH LIMITED | Private company limited by shares | Live |