| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Devonport Dry Dock & Engineering Co Ltd | 03178466 | 02/07/1996 | Dissolved |
| MIKE LEECE & ASSOCIATES LIMITED | 03178415 | 02/07/1996 | Dissolved |
| Marine South West | 05087129 | 29/03/2004 | Dissolved |
| Nma Submarines Ltd | 05214024 | 25/08/2004 | Dissolved |
| PLYMOUTH DEVELOPMENT PARTNERSHIP LIMITED | 02762763 | 08/12/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| APPLEDORE SHIPBUILDERS (2004) LIMITED | 02052982 | 16/11/1992 | 30/06/1996 | Bronze |
| BABCOCK MARINE (DEVONPORT) LIMITED | 02959785 | 27/10/1994 | 30/06/1996 | Silver |
| COLLEGE OF ST. MARK AND ST. JOHN FOUNDATION (THE) | 00986239 | 14/07/2000 | 23/09/2002 | Dissolved |
| DEVON, EXETER AND PLYMOUTH CHAMBER OF COMMERCE | 00617795 | 10/04/2006 | 11/04/2011 | Gold |
| DEVONPORT ROYAL DOCKYARD LIMITED | 02077752 | 29/10/1992 | 30/06/1996 | One Red Flag |
| Devonport Engineering Services Ltd | 02953267 | 18/05/1995 | 30/06/1996 | Dissolved |
| NATIONAL AQUARIUM LIMITED | 04027669 | 30/06/2000 | 19/11/2004 | Gold |
| NMA OPERATIONS LIMITED | 02972338 | 02/12/1997 | 31/03/2007 | One Red Flag |
| PLYMOUTH CITY DEVELOPMENT COMPANY LIMITED | 06365287 | 23/01/2008 | 10/12/2010 | Dissolved |
| SCYLLA REEF LIMITED | 05042643 | 05/03/2004 | 31/03/2007 | Not Trading |
| SOCIETY FOR UNDERWATER TECHNOLOGY(THE) | 00932590 | 08/12/2005 | 01/12/2011 | Silver |
| SPIRIT OF THE MAYFLOWER LIMITED | 04482037 | 10/07/2002 | 28/01/2003 | Dissolved |
| THE MARINE BIOLOGICAL ASSOCIATION (LEGACY MATTERS) LIMITED | 00021401 | 06/04/2001 | 23/04/2004 | Dissolved |
| UOE CONSULTING LIMITED | 01665648 | 15/10/1992 | 11/05/1994 | Dissolved |