| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| COGAP LIMITED | 06454206 | 14/12/2007 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CADENT FINANCE PLC | 05895068 | 07/02/2022 | 30/09/2024 | Silver |
| CADENT GAS LIMITED | 10080864 | 07/02/2022 | 30/09/2024 | Bronze |
| CADENT SERVICES LIMITED | 10080921 | 07/02/2022 | 30/09/2024 | Bronze |
| COGAP (MIDDLE EAST) LIMITED | 06454224 | 14/12/2007 | 30/11/2020 | Amber |
| COSTAIN ALCAIDESA LIMITED | 02042076 | 05/06/2006 | 30/11/2020 | Bronze |
| COSTAIN BUILDING & CIVIL ENGINEERING LIMITED | 01054232 | 05/06/2006 | 30/11/2020 | Gold |
| COSTAIN CIVIL ENGINEERING LIMITED | 02757907 | 07/05/2019 | 30/11/2020 | Amber |
| COSTAIN ENERGY SOLUTIONS LIMITED | 08114519 | 21/06/2012 | 30/11/2020 | Not Trading |
| COSTAIN ENGINEERING & CONSTRUCTION (OVERSEAS) LIMITED | 02440830 | 05/06/2006 | 30/11/2020 | Gold |
| COSTAIN ENGINEERING & CONSTRUCTION LIMITED | 02440829 | 05/06/2006 | 30/11/2020 | Gold |
| COSTAIN GROUP PLC | 01393773 | 05/06/2006 | 30/11/2020 | Gold |
| COSTAIN INTEGRATED TECHNOLOGY SOLUTIONS LIMITED | 01439838 | 05/07/2016 | 30/11/2020 | Gold |
| COSTAIN INTERNATIONAL LIMITED | 00563275 | 05/06/2006 | 30/11/2020 | Amber |
| COSTAIN LIMITED | 00610201 | 05/06/2006 | 30/11/2020 | Silver |
| COSTAIN OIL, GAS & PROCESS (OVERSEAS) LIMITED | 00583789 | 05/06/2006 | 30/11/2020 | Not Trading |
| COSTAIN OIL, GAS & PROCESS LIMITED | 00786418 | 05/06/2006 | 30/11/2020 | One Red Flag |
| COUNTY & DISTRICT PROPERTIES LIMITED | 00675355 | 05/06/2006 | 30/11/2020 | Silver |
| ELECTRICITY SETTLEMENTS COMPANY LTD | 08961281 | 11/11/2014 | 02/10/2020 | Bronze |
| LOW CARBON CONTRACTS COMPANY LTD | 08818711 | 11/11/2014 | 02/10/2020 | Amber |
| QUADGAS FINANCE PLC | 10619488 | 07/02/2022 | 30/09/2024 | Bronze |
| RENOWN INVESTMENTS (HOLDINGS) LIMITED | 00683698 | 05/06/2006 | 30/11/2020 | Gold |
| RICHARD COSTAIN LIMITED | 00274453 | 05/06/2006 | 30/11/2020 | Bronze |
| WESTMINSTER PLANT CO. LIMITED | 00552140 | 05/06/2006 | 30/11/2020 | Not Trading |
| WINCANTON LIMITED | 04178808 | 01/09/2020 | 29/04/2024 | One Red Flag |