| MONITOR COMPANY LIMITED | Private company limited by shares | Dissolved |
| PA MONITOR LIMITED | Private company limited by shares | Dissolved |
| AIR MONITOR LIMITED | Company limited by guarantee | Live |
| NTA MONITOR LIMITED | Private company limited by shares | Live |
| LQ Monitor Limited | Private company limited by shares | Live |
| Cs go monitor Limited | | Live |
| USA AIR MONITOR (ASIA) LIMITED | Private company limited by shares | Live |
| ASIAN MONETARY MONITOR LIMITED | Private company limited by shares | Dissolved |
| Monitor Finance Consultancy Limited | Private company limited by shares | Live |
| English Monitor Limited | Private company limited by shares | Live |
| MONITOR AIR TRANSPORT LIMITED | Private company limited by shares | Dissolved |
| THOMSON ALARM CENTRAL MONITORING LIMITED | Private company limited by shares | Live |
| MONITORING BUSINESS CENTER COMPANY LIMITED | Private company limited by shares | Dissolved |
| Global Structure Health Monitoring Technology & Consultancy Limited | Private company limited by shares | Live |
| Insight Structural Health Monitoring Limited | Private company limited by shares | Live |
| YAXIYA MONITORING SYSTEM INSTITUTE OF SCIENCE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| INVESTMENT MONITORING CO. LIMITED | Private company limited by shares | Live |
| EMIC Knowledge Project Design, Monitoring & Evaluation Consultancy Limited | Private company limited by shares | Live |
| Learning Monitoring Limited | Private company limited by shares | Dissolved |
| MASSTECH TANK INTEGRITY TESTING AND MONITORING SERVICES LIMITED | Private company limited by shares | Dissolved |
| ONE MONITORING PROPERTIES LIMITED -THE- | Private company limited by shares | Live |
| QUALITY AIR MONITORING SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| RADIATION & MONITORING LIMITED | Private company limited by shares | Dissolved |
| Remote Automation Monitoring Limited | Private company limited by shares | Live |
| Social Monitoring Limited | Private company limited by shares | Live |
| MONITORING SOLUTIONS LIMITED | Private company limited by shares | Live |
| Structural Monitoring Solutions Limited | Private company limited by shares | Live |
| HAYES MONITORING SYSTEMS LIMITED | Private company limited by shares | Live |
| Monitorlinq Limited | Private company limited by shares | Live |