| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Commercia Construction Consultants (Northern) Ltd | 01935585 | 15/05/1991 | Dissolved |
| Commercia Construction Consultants (Northern) Ltd | 01935585 | 15/05/1991 | Dissolved |
| Lepas Ltd | 05290589 | 18/11/2004 | Dissolved |
| Psw - Stewart & Williamson Limited | SC146032 | 16/03/1994 | Dissolved |
| Seven Ways Management Services Ltd | 01168620 | 31/12/1991 | Dissolved |
| Stobar X11 Ltd | 03021593 | 14/02/1995 | Dissolved |
| Stokes Lcc Ltd | 05761435 | 29/03/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMSA MANAGEMENT LIMITED | 01293060 | 29/01/1991 | 25/08/1992 | Bronze |
| BLACK ROCK PROPERTIES LIMITED | 05212095 | 23/08/2004 | 05/11/2005 | Dissolved |
| BLACK ROCK PROPERTIES LIMITED | 05212095 | 23/08/2004 | 05/11/2005 | Dissolved |
| Bid Builder Ltd | 05311702 | 15/08/2005 | 08/01/2008 | Dissolved |
| LIFE CYCLE MANAGER LIMITED | 08384623 | 01/02/2013 | 26/11/2013 | Dissolved |
| P S W Projects Ltd | 01368404 | 01/12/1991 | 23/11/1999 | Dissolved |
| Sevenside Developments Ltd | 02339112 | 28/08/1991 | 15/05/1993 | Dissolved |
| Sevenside Developments Ltd | 02339112 | 15/05/1991 | 24/06/1992 | Dissolved |
| Windborne-Psw International Ltd | 02437434 | 30/10/1991 | 30/04/1999 | Dissolved |