| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Occlude Ltd | 00951101 | 01/01/1992 | Dissolved |
| Octennial Ltd | 00940426 | 01/01/1992 | Dissolved |
| Octuple Ltd | 00866544 | 01/01/1992 | Dissolved |
| Oculist Ltd | 01120440 | 01/01/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMEC NUCLEAR M & O LIMITED | 05664844 | 03/01/2006 | 01/04/2006 | Dissolved |
| AMEC NUCLEAR OVERSEAS LIMITED | 04037762 | 15/08/2000 | 01/04/2006 | Dissolved |
| AMEC NUCLEAR PROJECTS LIMITED | 05664962 | 03/01/2006 | 01/04/2006 | Dissolved |
| AMENTUM CLEAN ENERGY INTERNATIONAL LIMITED | 03260477 | 15/11/1996 | 01/04/2006 | Silver |
| AMENTUM CLEAN ENERGY LIMITED | 01120437 | 01/01/1992 | 01/04/2006 | Bronze |
| FAST REACTOR TECHNOLOGY LIMITED | 01853864 | 01/01/1992 | 01/04/2006 | Not Trading |
| NANTWICH MUSEUM TRUST LIMITED | 01455850 | 23/05/2000 | 20/06/2005 | Silver |
| NATIONAL NUCLEAR CORPORATION LIMITED | 02290928 | 01/01/1992 | 01/04/2006 | One Red Flag |
| Niras Analytical Ltd | 04701858 | 18/03/2003 | 01/04/2006 | Dissolved |
| PWR POWER PROJECTS LIMITED | 02281663 | 01/02/2000 | 01/04/2006 | Gold |
| STATS-NNC LIMITED | 04339062 | 22/02/2002 | 01/04/2006 | Dissolved |
| Solutions-Nnc Ltd | 01691539 | 01/01/1992 | 01/04/2006 | Dissolved |
| TECHNICA-NNC LIMITED | SC235856 | 05/11/2002 | 01/04/2006 | Dissolved |
| WOOD FINANCE UK LIMITED | 03725076 | 06/09/1999 | 01/04/2006 | Gold |