| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ATHOS HOLDINGS LIMITED | 10532529 | 19/12/2016 | Not Trading |
| DANCE UMBRELLA LIMITED | 01402702 | 01/01/2020 | Silver |
| DISCOVER EXPLORATION LIMITED | 08259092 | 30/03/2021 | Amber |
| Golf International Online Ltd | 03998068 | 31/08/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRITISH GAS TRADING LIMITED | 03078711 | 11/04/2005 | 31/07/2008 | Silver |
| CBS ENERGY STORAGE ASSETS UK LIMITED | 02352390 | 27/06/2002 | 06/03/2003 | Bronze |
| CENTRICA DISTRIBUTED GENERATION LIMITED | 04713745 | 27/03/2003 | 09/05/2003 | Bronze |
| CENTRICA ENERGY (TRADING) LIMITED | 02877397 | 14/08/2003 | 31/07/2008 | Dissolved |
| CENTRICA ENERGY ASSETS HOLDINGS LIMITED | 05006144 | 17/05/2004 | 13/07/2004 | Amber |
| CENTRICA ENERGY LIMITED | 02877398 | 21/03/2005 | 31/07/2008 | Silver |
| CENTRICA ENERGY OPERATIONS LIMITED | 04217941 | 16/05/2001 | 06/03/2003 | Dissolved |
| CENTRICA ENERGY STORAGE LIMITED | 03294124 | 14/11/2002 | 03/11/2003 | Bronze |
| CENTRICA LEASING (KL) LIMITED | 04910816 | 24/09/2003 | 05/05/2004 | Dissolved |
| CENTRICA LNG COMPANY LIMITED | 06366483 | 11/09/2007 | 31/07/2008 | Silver |
| CENTRICA PLC | 03033654 | 01/01/2005 | 12/05/2008 | Silver |
| CENTRICA STORAGE HOLDINGS LIMITED | 04573558 | 08/11/2002 | 03/11/2003 | Silver |
| Cordex Ltd | 03970849 | 15/05/2000 | 21/04/2006 | Dissolved |
| DISTRIBUTED ENERGY ASSET SOLUTIONS LIMITED | 04862313 | 11/08/2003 | 27/04/2004 | Dissolved |
| DISTRIBUTED ENERGY CUSTOMER SOLUTIONS LIMITED | 04942184 | 23/10/2003 | 27/04/2004 | Silver |
| Dynegy Europe Ltd | 02942531 | 21/06/1994 | 07/05/1997 | Dissolved |
| EP SHB LIMITED | 02571241 | 25/05/2001 | 06/03/2003 | Silver |
| HUMBERLAND LIMITED | 02949541 | 25/05/2001 | 06/03/2003 | Not Trading |
| Konmar Ltd | 03819649 | 20/09/1999 | 02/07/2002 | Dissolved |
| ONE-DYAS UK LIMITED | 03531783 | 11/06/2013 | 05/07/2016 | Silver |
| OPHIR ENERGY LIMITED | 05047425 | 04/09/2009 | 07/07/2011 | Bronze |
| PEAK MOTORSPORTS LIMITED | 03162559 | 22/02/1996 | 16/03/2012 | Dissolved |
| RACE BANK WIND FARM LIMITED | 05017828 | 16/01/2004 | 27/04/2004 | Silver |
| RIVER NENE POWER LIMITED | 04262250 | 31/07/2001 | 06/03/2003 | Gold |
| RWE KL LIMITED | 04262243 | 31/07/2001 | 06/03/2003 | Not Trading |
| SPIRIT ENERGY NORTH SEA LIMITED | 04594558 | 26/10/2004 | 31/07/2008 | Silver |
| SPIRIT ENERGY PRODUCTION UK LIMITED | 03115179 | 31/10/1997 | 31/07/2008 | Gold |
| SPIRIT ENERGY RESOURCES LIMITED | 02855151 | 26/11/1998 | 31/07/2008 | Silver |
| SPIRIT NORWAY LIMITED | 05747539 | 17/03/2006 | 31/07/2008 | N/A |
| SPIRIT RESOURCES (ARMADA) LIMITED | 04181384 | 30/11/2001 | 31/07/2008 | Gold |
| VOSTOK ENERGY PUBLIC LIMITED COMPANY | 05806076 | 10/10/2008 | 07/03/2014 | Dissolved |