| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Mowlem-S G B Trustee Co Ltd | 02683037 | 07/06/2001 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALDENHAM ENTERPRISES LTD | 01635965 | 15/11/1999 | 14/11/2008 | Bronze |
| ALFRED BOOTH & COMPANY LIMITED | 00136349 | 10/06/1991 | 30/06/1994 | Dissolved |
| ALTO MANAGEMENT (U.K.) LIMITED | 02119800 | 20/04/1996 | 23/10/1997 | Bronze |
| Beechplane Ltd | 02001451 | 01/02/1993 | 30/06/1994 | Dissolved |
| CARILLION JM LIMITED | 00077628 | 02/04/1992 | 30/06/1994 | Insolvent |
| CARILLION MANAGEMENT LIMITED | 01223050 | 01/02/1993 | 30/06/1994 | Dissolved |
| CARILLION SECRETARIAT LIMITED | 00945169 | 24/02/1993 | 30/06/1994 | Dissolved |
| CEDAR (MAPLE OAK) LTD | 01469541 | 02/05/1992 | 06/10/1992 | Gold |
| GEOFFREY OSBORNE LIMITED | 00873093 | 01/02/1995 | 31/03/2000 | Insolvent |
| GLASGOW STOCKHOLDERS TRUST LIMITED | SC014842 | 18/07/1989 | 28/02/1997 | Dissolved |
| HARSCO INFRASTRUCTURE GROUP LIMITED | 00164238 | 01/02/1993 | 30/06/1994 | Bronze |
| HARSCO INFRASTRUCTURE SERVICES LIMITED | 00276562 | 30/06/1993 | 30/06/1994 | Amber |
| JOHN MOWLEM CONSTRUCTION LIMITED | 01947809 | 01/02/1993 | 30/06/1994 | Dissolved |
| Johnston Group Ltd | 00058850 | 01/07/1994 | 19/11/2004 | Dissolved |
| MOOR PARK (1958) LIMITED | 00614377 | 09/04/1991 | 15/10/1998 | Gold |
| Midlands Metro Ltd | 01383138 | 01/02/1992 | 30/06/1994 | Dissolved |
| Mowlem Investments Ltd | 01278438 | 01/02/1993 | 30/06/1994 | Dissolved |
| Mowlem Technology Ltd | 01210429 | 01/02/1993 | 30/06/1994 | Dissolved |
| SGB HOLDINGS LIMITED | 00947915 | 01/09/1992 | 30/06/1994 | Not Trading |
| SGB INVESTMENTS LIMITED | 00726995 | 21/07/1993 | 30/06/1994 | Not Trading |
| ST.MARTINS'(NORTHWOOD)PREPARATORY SCHOOL TRUST LIMITED | 00709159 | 04/03/1992 | 01/01/2002 | Gold |
| THE ALDENHAM FOUNDATION | 01847134 | 24/11/1998 | 02/12/2008 | Gold |