| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| HALTERMANN CARLESS FLUIDS LIMITED | 10475062 | 11/11/2016 | Dissolved |
| OVAL (2006) LIMITED | 05278489 | 15/04/2013 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BP CHEMICALS EAST CHINA INVESTMENTS LIMITED | 04152953 | 01/02/2005 | 06/10/2005 | Dissolved |
| CABOT ENERGY LIMITED | 02933545 | 12/04/2010 | 26/08/2010 | One Red Flag |
| CAITHNESS SERVICES LIMITED | 05806024 | 16/10/2008 | 23/03/2010 | Dissolved |
| ELECTRICAL OIL SERVICES LIMITED | 03749629 | 19/11/2012 | 02/03/2017 | Not Trading |
| HALTERMANN CARLESS UK LIMITED | 00429315 | 15/04/2013 | 20/07/2017 | Gold |
| HC FLUIDS LIMITED | 10474652 | 11/11/2016 | 20/07/2017 | Dissolved |
| IGAS ENERGY ENTERPRISE LIMITED | 05457589 | 16/10/2008 | 23/03/2010 | Bronze |
| INEOS EUROPEAN HOLDINGS LIMITED | 05310700 | 25/04/2005 | 31/10/2006 | Silver |
| INEOS NOMINEE LIMITED | 05310669 | 16/12/2005 | 31/10/2006 | Dissolved |
| INNOVENE TRUSTEE LIMITED | SC300164 | 03/04/2006 | 01/10/2006 | Not Trading |
| INNOVENE TRUSTEE LIMITED | SC300164 | 03/04/2006 | 24/07/2008 | Not Trading |
| MOLTEN TECHNOLOGIES LIMITED | 07046886 | 30/03/2011 | 30/09/2012 | Gold |
| MOLTEN TECHNOLOGIES LIMITED | 07046886 | 30/03/2011 | 26/09/2012 | Gold |
| OVAL (2005) LIMITED | 05278490 | 15/04/2013 | 20/07/2017 | Dissolved |
| PCL BIDCO LIMITED | 08272224 | 19/06/2013 | 20/07/2017 | Amber |
| PCL HOLDCO LIMITED | 08272174 | 19/06/2013 | 20/07/2017 | Gold |
| PETROCHEM CARLESS HOLDINGS LTD. | 05259753 | 15/04/2013 | 20/07/2017 | Dissolved |
| PETROCHEM UK LIMITED | 01601509 | 15/04/2013 | 20/07/2017 | Dissolved |
| PETROINEOS EUROPE LIMITED | 05310655 | 16/12/2005 | 31/10/2006 | Bronze |
| PETROINEOS MANUFACTURING SCOTLAND LIMITED | SC010612 | 25/04/2005 | 04/05/2006 | One Red Flag |