| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| FOSTER WHEELER (PACIFIC) LIMITED | 01808047 | 01/05/2013 | Dissolved |
| FW MANAGEMENT OPERATIONS (U.K.) LIMITED | 01628475 | 01/05/2013 | Dissolved |
| VESUVIUS HOLDINGS LIMITED | 00251977 | 23/05/2023 | Silver |
| VESUVIUS PLC | 08217766 | 01/04/2023 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMEC FOSTER WHEELER (HOLDINGS) LIMITED | 00163609 | 18/08/2014 | 26/08/2016 | Bronze |
| AMEC FOSTER WHEELER ENERGY LIMITED | 01361134 | 11/01/2013 | 11/01/2018 | Bronze |
| ATTRIC LTD | 06134174 | 19/09/2014 | 11/01/2018 | Dissolved |
| FOSTER WHEELER (G.B.) LIMITED | 00745470 | 25/04/2013 | 26/02/2018 | Silver |
| FOSTER WHEELER (LONDON) LIMITED | 00887857 | 01/05/2013 | 26/08/2016 | Amber |
| FOSTER WHEELER (PROCESS PLANTS) LIMITED | 01184855 | 01/05/2013 | 26/08/2016 | Not Trading |
| FOSTER WHEELER E&C LIMITED | 02247293 | 25/04/2013 | 29/11/2017 | Not Trading |
| FOSTER WHEELER ENVIRONMENTAL (UK) LIMITED | 01657494 | 01/05/2013 | 26/08/2016 | Not Trading |
| FOSTER WHEELER EUROPE | 04127813 | 25/04/2013 | 26/08/2016 | Silver |
| FOSTER WHEELER MANAGEMENT LIMITED | 05344191 | 30/11/2014 | 26/08/2016 | Dissolved |
| FOSTER WHEELER PETROLEUM DEVELOPMENT LIMITED | 01184825 | 01/05/2013 | 26/08/2016 | Dissolved |
| FOSTER WHEELER WORLD SERVICES LIMITED | 01439353 | 01/05/2013 | 29/11/2017 | Silver |
| FW INVESTMENTS LIMITED | 06933416 | 01/12/2014 | 12/11/2015 | Silver |
| INGEN HOLDINGS LIMITED | SC292720 | 19/09/2014 | 27/02/2015 | Dissolved |
| INGEN-IDEAS LIMITED | SC204755 | 19/09/2014 | 27/02/2015 | One Red Flag |
| PROCESS INDUSTRIES AGENCY LIMITED | 01566425 | 01/05/2013 | 29/11/2017 | Dissolved |
| PROCESS PLANTS SUPPLIERS LIMITED | 00957881 | 01/05/2013 | 26/08/2016 | Not Trading |
| TRAY (UK) LIMITED | 01867629 | 01/05/2013 | 26/08/2016 | Dissolved |
| TRAY FIELD SERVICES LIMITED | 02191590 | 01/05/2013 | 26/08/2016 | Dissolved |