| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 2SERVE (St Peter's) Ltd | 02911027 | 01/09/1996 | Dissolved |
| 2SERVE (St Peter's) Ltd | 02911027 | 06/11/1995 | Dissolved |
| Serco Facilities Management Ltd | 02517692 | 01/09/1996 | Dissolved |
| Serco Facilities Management Ltd | 02517692 | 06/11/1995 | Dissolved |
| Serco Government Central Services Ltd | 02756646 | 01/09/1996 | Dissolved |
| Serco Government Central Services Ltd | 02756646 | 06/11/1995 | Dissolved |
| Serco Health Fm Ltd | 03393858 | 27/11/1997 | Dissolved |
| Serco Health Services Ltd | 02478475 | 01/09/1996 | Dissolved |
| Serco Health Services Ltd | 02478475 | 06/11/1995 | Dissolved |
| Vericom Ltd | 01775274 | 11/10/1995 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Building Management Scotland Ltd | SC148972 | 01/09/1996 | 12/06/1998 | Dissolved |
| Building Management Scotland Ltd | SC148972 | 01/03/1996 | 31/03/2000 | Dissolved |
| Community Leisure Management Ltd | 02163239 | 01/09/1996 | 21/04/1998 | Dissolved |
| Community Leisure Management Ltd | 02163239 | 01/01/1996 | 30/04/2000 | Dissolved |
| Euroserv Ltd | 01562858 | 06/11/1995 | 30/04/2000 | Dissolved |
| I A L Ltd | 01630799 | 06/11/1995 | 30/04/2000 | Dissolved |
| International Aeradio Ltd | 01485659 | 06/11/1995 | 30/04/2000 | Dissolved |
| LOWDHAM GRANGE PRISON SERVICES LIMITED | 03154430 | 28/10/1996 | 14/01/1997 | Amber |
| London Call Centre Co Ltd | 03334238 | 01/04/1997 | 30/04/2000 | Dissolved |
| London Call Centre Co Ltd | 03334238 | 01/04/1997 | 30/04/2000 | Dissolved |
| Prime Contractors Ltd | 02378246 | 01/09/1996 | 21/04/1998 | Dissolved |
| Prime Contractors Ltd | 02378246 | 01/01/1996 | 30/04/2000 | Dissolved |
| Railtest Ltd | 03302974 | 18/03/1997 | 05/06/1998 | Dissolved |
| Railtest Ltd | 03302974 | 14/02/1997 | 29/03/1999 | Dissolved |
| Railtest Operations Ltd | 03318555 | 14/02/1997 | 05/06/1998 | Dissolved |
| Railtest Operations Ltd | 03318555 | 14/02/1997 | 29/03/1999 | Dissolved |
| SERCO EUROPE LIMITED | 00451392 | 06/11/1995 | 31/01/2000 | Dissolved |
| SERCO LIMITED | 00242246 | 06/11/1995 | 12/10/1998 | Silver |
| SERCO REGIONAL SERVICES LIMITED | 01653016 | 01/07/1994 | 01/12/1995 | One Red Flag |
| Salco Ltd | SC119531 | 22/10/1997 | 01/05/1998 | Dissolved |
| Salco Ltd | SC119531 | 19/11/1997 | 01/05/1998 | Dissolved |
| Serco Aviation Services Ltd | 01538157 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Consultants Ltd | 02186483 | 31/12/1994 | 01/12/1995 | Dissolved |
| Serco Consultants Ltd | 02186483 | 31/12/1994 | 01/12/1995 | Dissolved |
| Serco Contracting Ltd | 02435848 | 01/09/1996 | 21/04/1998 | Dissolved |
| Serco Contracting Ltd | 02435848 | 01/01/1996 | 30/04/2000 | Dissolved |
| Serco Defence F M Ltd | SC148509 | 01/09/1996 | 12/06/1998 | Dissolved |
| Serco Defence F M Ltd | SC148509 | 01/03/1996 | 31/03/2000 | Dissolved |
| Serco Development Services Ltd | 00592499 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Education Ltd | 02109225 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Field Services Ltd | 02050174 | 01/09/1996 | 21/05/1998 | Dissolved |
| Serco Field Services Ltd | 02050174 | 13/03/1996 | 30/04/2000 | Dissolved |
| Serco Inactive 1 Ltd | 02269522 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Inactive 2 Ltd | SC148913 | 01/09/1996 | 18/05/1998 | Dissolved |
| Serco Inactive 2 Ltd | SC148913 | 01/03/1996 | 31/03/2000 | Dissolved |
| Serco Inactive 4 Ltd | 00850447 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco International Fire Training Centre Ltd | 01563367 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Leisure Ltd | 02202587 | 01/09/1996 | 21/04/1998 | Dissolved |
| Serco Leisure Ltd | 02202587 | 01/01/1996 | 30/04/2000 | Dissolved |
| Serco Maintenance Services Ltd | 02674902 | 22/10/1997 | 21/05/1998 | Dissolved |
| Serco Maintenance Services Ltd | 02674902 | 19/11/1997 | 30/04/2000 | Dissolved |
| Serco Management Services Ltd | SC148516 | 01/09/1996 | 12/06/1998 | Dissolved |
| Serco Management Services Ltd | SC148516 | 01/03/1996 | 31/03/2000 | Dissolved |
| Serco Metrolink Ltd | 03337055 | 27/03/1997 | 05/06/1998 | Dissolved |
| Serco Metrolink Ltd | 03337055 | 27/03/1997 | 29/03/1999 | Dissolved |
| Serco Nationwide Fire Services Ltd | 03306417 | 24/01/1997 | 05/06/1998 | Dissolved |
| Serco Nationwide Fire Services Ltd | 03306417 | 25/02/1997 | 29/03/1999 | Dissolved |
| Serco Operations Ltd | 01858592 | 01/09/1996 | 06/05/1998 | Dissolved |
| Serco Operations Ltd | 01858592 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Quality & Safety Services Ltd | 02475633 | 01/09/1996 | 30/04/2000 | Dissolved |
| Serco Quality & Safety Services Ltd | 02475633 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Rail Services Ltd | 03119213 | 14/10/1997 | 05/06/1998 | Dissolved |
| Serco Rail Services Ltd | 03119213 | 14/10/1997 | 29/03/1999 | Dissolved |
| Serco Raildata Ltd | 03340203 | 27/03/1997 | 05/06/1998 | Dissolved |
| Serco Raildata Ltd | 03340203 | 27/03/1997 | 29/03/1999 | Dissolved |
| Serco Railtest Ltd | 03114741 | 14/02/1997 | 05/06/1998 | Dissolved |
| Serco Railtest Ltd | 03114741 | 14/02/1997 | 29/03/1999 | Dissolved |
| Serco Resource Management Ltd | 02213159 | 01/09/1996 | 21/04/1998 | Dissolved |
| Serco Resource Management Ltd | 02213159 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Services Ltd | SC145051 | 01/09/1996 | 12/06/1998 | Dissolved |
| Serco Services Ltd | SC145051 | 06/11/1995 | 31/03/2000 | Dissolved |
| Serco Shrm Ltd | SC145890 | 22/10/1997 | 01/05/1998 | Dissolved |
| Serco Skysafe Limited | 02496715 | 01/09/1996 | 24/06/1998 | Dissolved |
| Serco Skysafe Limited | 02496715 | 06/11/1995 | 30/04/2000 | Dissolved |
| Serco Systems Ltd | 01861237 | 30/04/1994 | 01/12/1995 | Dissolved |
| Serco Systems Ltd | 01861237 | 10/02/1995 | 01/12/1995 | Dissolved |
| Serco Test Technology Ltd | 01413253 | 11/10/1995 | 01/12/1995 | Dissolved |
| Serco Test Technology Ltd | 01413253 | 11/10/1995 | 01/12/1995 | Dissolved |
| Sercoserve Ltd | 02497013 | 01/09/1996 | 21/04/1998 | Dissolved |
| Sercoserve Ltd | 02497013 | 01/01/1996 | 30/04/2000 | Dissolved |
| Superbusy Ltd | 02533020 | 01/09/1996 | 21/04/1998 | Dissolved |
| Superbusy Ltd | 02533020 | 06/11/1995 | 30/04/2000 | Dissolved |
| Tollway Ltd | 03070856 | 06/09/1995 | 04/10/1995 | Dissolved |
| Tollway Ltd | 03070856 | 06/09/1995 | 04/10/1995 | Dissolved |
| Traffic Information Services Ltd | 02429339 | 01/07/1994 | 01/12/1995 | Dissolved |
| Vericom Ltd | 01775274 | 11/10/1995 | 01/12/1995 | Dissolved |