
| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| BQT Solutions (UK) Ltd | Access control | Global | |
| SMi Group Ltd. | Exhibition and conference organising | United Kingdom (UK) | |
| 1st Choice CCTV | CCTV | United Kingdom (UK) | |
| 24/7 Close Protection Ltd | Physical security | United Kingdom (UK) | |
| 247webvision | CCTV | United Kingdom (UK) | |
| 4Site Online Ltd. | Integrated security | Western Europe | |
| 6 Alpha Associates Ltd | CCTV | United Kingdom (UK) | |
| Able Security Concepts Ltd | Manned guarding | United Kingdom (UK) | |
| AD Porta Security | Manned guarding | United Kingdom (UK) | |
| ADB Alarms Ltd | Intruder alarm | United Kingdom (UK) | |
| ADi security and surveillance | CCTV | United Kingdom (UK) | |
| Adilec Enginyeria | Communication equipments | Sweden | |
| ADL Fire and Security Ltd | CCTV | United Kingdom (UK) | |
| ADT | Integrated security | South Africa | |
| ADT Fire and Security Plc | CCTV | United Kingdom (UK) | |
| Advance Peripheral Systems Ltd | Intruder alarm | United Kingdom (UK) | |
| Advance Security UK Ltd | Manned guarding | United Kingdom (UK) | |
| Advanced Vision Systems | CCTV | United Kingdom (UK) | |
| Aerocodic Ltd | CCTV | Portugal | |
| AFTEK Ltd | Door interface/controls | India | |
| AGE CCTV | CCTV | United Kingdom (UK) | |
| AK Telecom & ITS Services | Consulting services | United Kingdom (UK) | |
| Alink Ltd (Security Installers) | Integrated security | United Kingdom (UK) | |
| Amplicon | IP networking products | United Kingdom (UK) | |
| Andrews International | Physical security | Global | |
| Archbold Security Consultancy | CCTV | United Kingdom (UK) | |
| ARG Security | CCTV | United Kingdom (UK) | |
| Arrest Fire & Security Ltd | CCTV | United Kingdom (UK) | |
| Asoni Communications Co., Ltd. | Consulting services | Global | |
| AST (London) Limited | Access control | United Kingdom (UK) | |



