| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Foster Wheeler (India) Ltd | 01062982 | 01/10/2004 | Dissolved |
| Foster Wheeler (Northern) Ltd | 01370813 | 01/10/2004 | Dissolved |
| Foster Wheeler Petroleum Development (Norway) Ltd | 01962138 | 01/10/2004 | Dissolved |
| Foster Wheeler Synfuels Ltd | 00947145 | 01/10/2004 | Dissolved |
| International Management Systems Ltd | 01602826 | 01/10/2004 | Dissolved |
| Operations International Ltd | 01631617 | 01/10/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMEC FOSTER WHEELER (HOLDINGS) LIMITED | 00163609 | 01/08/2004 | 20/04/2016 | One Red Flag |
| AMEC FOSTER WHEELER ENERGY LIMITED | 01361134 | 01/08/2004 | 20/04/2016 | One Red Flag |
| FOSTER WHEELER (G.B.) LIMITED | 00745470 | 01/09/2009 | 31/07/2014 | Bronze |
| FOSTER WHEELER (LONDON) LIMITED | 00887857 | 01/10/2004 | 31/07/2014 | One Red Flag |
| FOSTER WHEELER (PACIFIC) LIMITED | 01808047 | 05/11/2009 | 31/07/2014 | Dissolved |
| FOSTER WHEELER (PROCESS PLANTS) LIMITED | 01184855 | 01/10/2004 | 31/07/2014 | Not Trading |
| FOSTER WHEELER E&C LIMITED | 02247293 | 01/10/2004 | 31/07/2014 | Not Trading |
| FOSTER WHEELER ENVIRONMENTAL (UK) LIMITED | 01657494 | 01/10/2004 | 31/07/2014 | Not Trading |
| FOSTER WHEELER MANAGEMENT LIMITED | 05344191 | 05/11/2009 | 01/11/2012 | Dissolved |
| FOSTER WHEELER PETROLEUM DEVELOPMENT LIMITED | 01184825 | 04/06/2008 | 31/07/2014 | Dissolved |
| FOSTER WHEELER WORLD SERVICES LIMITED | 01439353 | 05/11/2009 | 29/07/2014 | Gold |
| FW MANAGEMENT OPERATIONS (U.K.) LIMITED | 01628475 | 04/06/2008 | 31/07/2014 | Dissolved |
| PROCESS INDUSTRIES AGENCY LIMITED | 01566425 | 11/11/2010 | 31/07/2014 | Dissolved |
| PROCESS PLANTS SUPPLIERS LIMITED | 00957881 | 01/10/2004 | 31/07/2014 | Not Trading |
| TRAY (UK) LIMITED | 01867629 | 08/09/2009 | 31/07/2014 | Dissolved |
| TRAY FIELD SERVICES LIMITED | 02191590 | 28/05/2010 | 31/07/2014 | Dissolved |