| ADS Group |
| Alenia Marconi Systems |
| Avon Protection |
| AWD Trucks |
| Babcock International |
| BAE Systems |
| BAE Systems Avionics |
| BAE Systems Maritime – Maritime Services |
| BAE Systems Maritime – Naval Ships |
| BMT Group |
| British Aerospace |
| British Shipbuilders |
| CAP Scientific |
| Carron Company |
| Chemring Group |
| Cobham (company) |
| CORDA (company) |
| Coventry Ordnance Works |
| Defence Aviation Repair Agency |
| Devonport Management Limited |
| Edgar Brothers |
| Elswick Ordnance Company |
| General Dynamics UK |
| Graseby |
| Imperial Defence Services |
| INSYS |
| Intelligent UK Holdings Limited |
| IPL Information Processing Limited |
| JCB (heavy equipment manufacturer) |
| Kelvin Hughes |
| Matra BAe Dynamics |
| Matra Marconi Space |
| Maxim Nordenfelt Guns and Ammunition Company |
| MBDA UK |
| Meggitt |
| Metrix UK |
| Phoenix Dynamo Manufacturing Company |
| Qinetiq |
| Racal |
| Rheinmetall BAE Systems Land |
| Rolls-Royce Controls and Data Services |
| Rolls-Royce Holdings |
| Royal Ordnance |
| SciSys |
| Selex ES |
| Serco |
| Short Brothers |
| Telespazio VEGA UK |
| Thales Air Defence |
| Thales Optronics |
| Thales Underwater Systems |
| Ultra Electronics |
| Vickers plc |
| Vickers Shipbuilding and Engineering |
| Wellman Group |
| Wilson-Pilcher |
| Yarrow Shipbuilders |