| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Asset Integrity Services Ltd | 05324474 | 07/01/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALTRAD ENGINEERING SERVICES LIMITED | 02887096 | 14/02/2005 | 12/06/2009 | Silver |
| AMENTUM E&C LIMITED | 04967961 | 08/12/2003 | 13/09/2004 | Silver |
| CHIEFTAIN GROUP LIMITED | 01455149 | 14/02/2005 | 12/06/2009 | Dissolved |
| CHIEFTAIN INSULATION (N.I.) LTD | NI018817 | 04/11/2008 | 12/06/2009 | Dissolved |
| CHIEFTAIN INSULATION LIMITED | 01684949 | 02/03/2007 | 12/06/2009 | Dissolved |
| CHIEFTAIN POWER SERVICES LTD | 02888420 | 04/11/2008 | 12/06/2009 | Dissolved |
| HUMBER CLIENT/CONTRACTOR TRAINING ASSOCIATION | 03560021 | 23/10/2009 | 26/11/2010 | Dissolved |
| KVAERNER (IOM) LIMITED | 00582981 | 09/05/2003 | 13/09/2004 | Dissolved |
| KVAERNER ENGINEERING & CONSTRUCTION (OVERSEAS TRADING) LIMITED | 00357926 | 09/05/2003 | 13/09/2004 | Insolvent |
| KVAERNER ENGINEERING SERVICES LIMITED | 02060438 | 14/08/1996 | 01/02/1999 | Insolvent |
| Kvaerner E & C Hong Kong Ltd | 01922341 | 09/05/2003 | 13/09/2004 | Dissolved |
| R BLACKETT CHARLTON LIMITED | 01800131 | 04/11/2008 | 12/06/2009 | Dissolved |
| R J REALISATIONS LIMITED | 01149262 | 02/03/2009 | 31/12/2010 | Dissolved |
| R. BLACKETT CHARLTON WORKSHOP SERVICES LIMITED | 02888416 | 01/10/2006 | 12/06/2009 | Dissolved |
| REDHALL MARINE LIMITED | 02096001 | 04/11/2008 | 12/06/2009 | Insolvent |
| UNITBIRWELCO (GROUP) LIMITED | 07279225 | 31/01/2014 | 31/03/2018 | Dissolved |