| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMEC FOSTER WHEELER GROUP LIMITED | 04612748 | 08/11/2004 | 01/10/2005 | Bronze |
| CLM ENGINEERING (OVERSEAS) LIMITED | 02992285 | 19/08/1996 | 12/02/1999 | Not Trading |
| COSTAIN ENGINEERING & CONSTRUCTION LIMITED | 02440829 | 01/11/1994 | 12/02/1999 | Gold |
| COSTAIN ENGINEERING LIMITED | 00426075 | 01/11/1994 | 12/02/1999 | Dissolved |
| COSTAIN OIL, GAS & PROCESS (OVERSEAS) LIMITED | 00583789 | 01/11/1994 | 12/02/1999 | Not Trading |
| COSTAIN OIL, GAS & PROCESS LIMITED | 00786418 | 01/11/1994 | 12/02/1999 | One Red Flag |
| Clm Engineering Ltd | 02617370 | 19/08/1996 | 12/02/1999 | Dissolved |
| Costain Environmental Services Ltd | 02568196 | 01/11/1994 | 12/02/1999 | Dissolved |
| Costain Life Sciences Ltd | 02475174 | 28/02/1993 | 07/06/2000 | Dissolved |
| E.C.I.A. (INSURANCE SERVICES) LIMITED | 04333180 | 02/09/2002 | 25/03/2009 | Not Trading |
| E.C.I.A. TRUSTEES LIMITED | 03355862 | 02/09/2002 | 25/03/2009 | Not Trading |
| ENERGY INDUSTRIES COUNCIL | 00493459 | 23/08/2007 | 30/04/2009 | Silver |