| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| GATEWAY STORAGE SHIPPING COMPANY LIMITED | SC295140 | 06/01/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABERGELLI POWER LIMITED | 08190497 | 24/08/2012 | 30/04/2015 | Amber |
| GATEWAY LNG COMPANY LIMITED | SC338851 | 11/04/2008 | 08/11/2020 | Dissolved |
| GATEWAY STORAGE COMPANY LIMITED | SC295137 | 06/01/2006 | 08/11/2020 | Dissolved |
| HIRWAUN POWER LIMITED | 08190283 | 24/08/2012 | 30/04/2015 | Amber |
| MILLBROOK POWER LIMITED | 08920458 | 03/03/2014 | 30/04/2015 | Amber |
| Mymegs Ltd | SC259355 | 17/11/2003 | 12/07/2004 | Dissolved |
| PRIME ENERGY LIMITED | 08943648 | 17/03/2014 | 30/04/2015 | Silver |
| PROGRESS POWER LIMITED | 08421833 | 27/02/2013 | 30/04/2015 | Amber |
| SAMBAR POWER LIMITED | SC380227 | 29/07/2010 | 20/06/2017 | Bronze |
| STAG ENERGY DEVELOPMENT CO. LTD. | SC240966 | 11/12/2002 | 20/12/2016 | Silver |
| TEAM ENERGY DEVELOPMENT LIMITED | SC470046 | 14/02/2014 | 12/05/2021 | Silver |
| WATT HOLDING LIMITED | SC390159 | 12/01/2011 | 22/02/2017 | Dissolved |
| WATT POWER LIMITED | SC380225 | 29/07/2010 | 30/04/2015 | Dissolved |
| WEAVER POWER LIMITED | SC233043 | 20/06/2002 | 30/04/2015 | One Red Flag |