| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CAMBRIDGE COMPUTER LAB RING | 04491100 | 24/04/2003 | Dissolved |
| EUSPRIG LIMITED | 08114788 | 20/06/2013 | Dissolved |
| Evaluation Services Ltd | 02558172 | 14/11/1991 | Dissolved |
| Good Old Days Ltd | 03467440 | 12/01/1998 | Dissolved |
| Monaspire Ltd | 04737005 | 21/06/2003 | Dissolved |
| OPERIS BUSINESS ENGINEERING LIMITED | 03373050 | 14/05/1997 | Gold |
| OPERIS GROUP LIMITED | 03367637 | 02/05/1997 | Silver |
| OPERIS INFRASTRUCTURE ADVISERS LIMITED | 11834559 | 19/02/2019 | Dissolved |
| OPERIS TRG LTD | 03332764 | 13/03/1997 | One Red Flag |
| OPERIS TRG LTD | 03332764 | 13/03/1997 | One Red Flag |
| Operis Financial Modelling Ltd. | 03367640 | 02/05/1997 | Dissolved |
| Operis Network Strategies Ltd. | 03367642 | 02/05/1997 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| MIRROR IMAGE RESTAURANTS LIMITED | 03326673 | 20/03/1997 | 15/12/2003 | Not Trading |
| MOVING IMAGE RESTAURANTS LIMITED | 03011796 | 30/05/1995 | 15/12/2003 | One Red Flag |
| OPERA HOLLAND PARK | 04515375 | 06/10/2004 | 24/09/2015 | Amber |
| PARTENAIRE LIMITED | 05555131 | 18/01/2006 | 30/10/2006 | Insolvent |
| PARTENAIRE LIMITED | 05555131 | 18/01/2006 | 30/10/2006 | Insolvent |