| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BUSINESS LINK DEVON & CORNWALL LIMITED | 02522301 | 30/11/2007 | Dissolved |
| Bailbrook College Ltd | 04988286 | 21/07/2006 | Dissolved |
| Kilmarnock Prison (Holdings) Ltd | 03443465 | 21/07/2006 | Dissolved |
| Medomsley Holdings Ltd | 03488629 | 21/07/2006 | Dissolved |
| Moreton Prison (Holdings) Ltd | 03471078 | 21/07/2006 | Dissolved |
| PHILIPS BAILIFFS LTD | 04499413 | 22/08/2012 | Dissolved |
| Prime Contractors Ltd | 02378246 | 21/07/2006 | Dissolved |
| SERCO COLLECTIONS LIMITED | 08322646 | 07/12/2012 | Dissolved |
| Serco Contracting Ltd | 02435848 | 21/07/2006 | Dissolved |
| Serco Leisure Ltd | 02202587 | 21/07/2006 | Dissolved |
| Serco Project Development Ltd | 02834872 | 21/07/2006 | Dissolved |
| Serco Systems Ltd | 01861237 | 21/07/2006 | Dissolved |
| Sercoserve Ltd | 02497013 | 21/07/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| COLLECTICA LIMITED | 03517395 | 22/08/2012 | 19/06/2014 | One Red Flag |
| LANE GROUP PLC | 00957723 | 28/09/2015 | 28/02/2022 | Not Trading |
| NPL MANAGEMENT LIMITED | 02937881 | 27/01/2010 | 27/07/2011 | Gold |
| PRIORITY PROPERTIES NORTH WEST LIMITED | 05422373 | 01/06/2012 | 10/10/2014 | Bronze |
| RESTORE (SPUR) LIMITED | 09836859 | 22/10/2015 | 08/12/2015 | Dissolved |
| SERCO LIMITED | 00242246 | 16/05/2012 | 13/08/2015 | Silver |
| SERCO REGIONAL SERVICES LIMITED | 01653016 | 21/07/2006 | 18/05/2009 | One Red Flag |
| SERCO-IAL LIMITED | 00427272 | 21/07/2006 | 06/10/2010 | Silver |