| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| R & M Engineering Services Ltd | 05869808 | 02/08/2007 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AKER ENGINEERING & TECHNOLOGY LIMITED | 05391240 | 01/12/2009 | 01/02/2011 | Amber |
| Ashlow Technology Ltd | 00390403 | 03/03/1998 | 20/09/1999 | Dissolved |
| DAVY MCKEE (SHEFFIELD) LIMITED | 00631209 | 30/03/1998 | 01/03/2005 | Insolvent |
| Davy British Rail International Ltd | 01758773 | 05/07/1996 | 01/03/2005 | Dissolved |
| Davy McKee (Poole) Ltd | 00312498 | 30/03/1998 | 01/03/2005 | Dissolved |
| HEAD WRIGHTSON PROCESS ENGINEERING LIMITED | 00635264 | 08/09/1997 | 01/03/2005 | Dissolved |
| Head Wrightson Construction Ltd | 02277322 | 08/09/1997 | 01/03/2005 | Dissolved |
| JACOBS E&C LIMITED | 04967961 | 12/09/2008 | 22/09/2011 | Gold |
| KVAERNER (IOM) LIMITED | 00582981 | 30/03/1998 | 12/05/2003 | Dissolved |
| KVAERNER ENGINEERING & CONSTRUCTION (OVERSEAS TRADING) LIMITED | 00357926 | 30/03/1998 | 12/05/2003 | Insolvent |
| KVAERNER ENGINEERING & CONSTRUCTION UK LIMITED | 00070860 | 09/06/1997 | 31/12/2003 | Insolvent |
| KVAERNER METALS CONTINUOUS CASTING LIMITED | 00573390 | 20/09/1999 | 01/03/2005 | Not Trading |
| KVAERNER METALS LIMITED | 00006662 | 16/06/2003 | 01/04/2005 | Insolvent |
| Kvaerner E & C Hong Kong Ltd | 01922341 | 30/03/1998 | 12/05/2003 | Dissolved |
| Kvaerner Metals (Korea) Ltd | 00268665 | 08/09/1997 | 01/03/2005 | Dissolved |
| Kvaerner Metals Contracting Ltd | 00866791 | 30/03/1998 | 01/03/2005 | Dissolved |
| Kvaerner Metals Sweden Ltd | 02512844 | 08/09/1997 | 01/03/2005 | Dissolved |
| Railway Construction Co Ltd | 00926449 | 08/09/1997 | 01/03/2005 | Dissolved |
| WORLEY E&C INTERNATIONAL LIMITED | 01896128 | 24/10/2008 | 22/09/2011 | Silver |
| WORLEY FIELD SERVICES LIMITED | 00454398 | 01/12/2009 | 05/03/2013 | One Red Flag |