| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ENERGY DIRECT LIMITED | 03696638 | 28/09/2000 | Dissolved |
| ENERGY DIRECT SUPPLY LIMITED | 03696650 | 28/09/2000 | Dissolved |
| GREAT YARMOUTH POWER LIMITED | 03233751 | 11/09/2017 | Dissolved |
| HOMEPOWER RETAIL LIMITED | 02806999 | 31/10/2001 | Insolvent |
| HOMEPOWER RETAIL LIMITED | 02806999 | 12/08/2005 | Insolvent |
| METERPLUS LIMITED | 03020536 | 29/08/2001 | Dissolved |
| NPOWER COGEN ENERGY LIMITED | 04977815 | 26/02/2004 | Dissolved |
| NPOWER COGEN ENERGY LIMITED | 04977815 | 08/05/2007 | Dissolved |
| NPOWER RENEWABLES AND CONSOLIDATION SERVICES LIMITED | 02842079 | 28/06/2010 | Dissolved |
| Npower Communications Ltd | 03925119 | 14/02/2000 | Dissolved |
| Nvisage | 02869974 | 24/09/2001 | Dissolved |
| Nvisage | 02869974 | 12/08/2005 | Dissolved |
| REGENESYS GROUP LIMITED | 03925121 | 14/02/2000 | Dissolved |
| REGENESYS GROUP LIMITED | 03925121 | 12/08/2005 | Dissolved |
| REGENESYS HOLDINGS LIMITED | 04043585 | 11/09/2017 | Dissolved |
| REGENESYS TECHNOLOGIES | 03527866 | 11/09/2017 | Dissolved |
| RWE COGEN UK (HYTHE) LIMITED | 04445217 | 15/10/2018 | Dissolved |
| RWE COGEN UK LIMITED | 02624987 | 15/10/2018 | Dissolved |
| RWE COGEN UK TRADING LIMITED | 02745602 | 11/09/2017 | Dissolved |
| RWE INGEN!US LIMITED | 09860756 | 01/12/2017 | Gold |
| RWE KL LIMITED | 04262243 | 01/12/2020 | Insolvent |
| RWE SOLUTIONS UK LIMITED | 01142192 | 04/11/2005 | Dissolved |
| SUPERIOR PLUMBING INSTALLATIONS GROUP LIMITED | 05982888 | 30/01/2009 | Dissolved |
| SUPERIOR PLUMBING INSTALLATIONS HOLDINGS LIMITED | 05982875 | 30/01/2009 | Dissolved |
| Scarcroft Leasing (3) | 02730695 | 24/09/2001 | Dissolved |
| Scarcroft Leasing (3) | 02730695 | 12/08/2005 | Dissolved |
| Scarcroft Leasing (4) | 02730699 | 24/09/2001 | Dissolved |
| Scarcroft Leasing (4) | 02730699 | 12/08/2005 | Dissolved |
| Scarcroft Leasing (6) Unlimited | 02925697 | 24/09/2001 | Dissolved |
| Scarcroft Leasing (6) Unlimited | 02925697 | 12/08/2005 | Dissolved |
| Scarcroft Leasing (Dec) | 02870842 | 24/09/2001 | Dissolved |
| Scarcroft Leasing (Dec) | 02870842 | 12/08/2005 | Dissolved |
| Scarcroft Leasing (Mar) Unlimited | 02947177 | 24/09/2001 | Dissolved |
| Scarcroft Leasing (Mar) Unlimited | 02947177 | 12/08/2005 | Dissolved |
| Scarcroft Leasing (Sep) | 02870840 | 19/09/2001 | Dissolved |
| Scarcroft Leasing (Sep) | 02870840 | 12/08/2005 | Dissolved |
| YE GAS LIMITED | 02571590 | 01/11/2004 | Dissolved |
| YELECO 29 LIMITED | 02731916 | 19/09/2001 | Dissolved |
| YELECO 29 LIMITED | 02731916 | 12/08/2005 | Dissolved |
| YORKSHIRE ENERGY LIMITED | 02571588 | 26/04/2005 | Dissolved |
| Yorkshire Electric Power Ltd | 02260026 | 19/09/2001 | Dissolved |
| Yorkshire Electric Power Ltd | 02260026 | 18/03/2003 | Dissolved |
| Yorkshire Electricity Group Share Scheme Trustees Ltd | 02525146 | 28/09/2001 | Dissolved |
| Yorkshire Electricity Group Share Scheme Trustees Ltd | 02525146 | 17/07/2003 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| E.ON NEXT ENERGY LIMITED | 03782443 | 01/11/2004 | 31/12/2016 | Silver |
| ELECTRICITY PLUS SUPPLY LIMITED | 05199936 | 31/03/2006 | 20/12/2013 | Gold |
| ENERGY DIRECT LIMITED | 03696638 | 10/11/2000 | 29/06/2012 | Dissolved |
| ENERGY DIRECT SUPPLY LIMITED | 03696650 | 10/11/2000 | 29/06/2012 | Dissolved |
| GAS PLUS SUPPLY LIMITED | 05199935 | 31/03/2006 | 20/12/2013 | Silver |
| GREAT YARMOUTH POWER LIMITED | 03233751 | 17/11/2005 | 01/07/2010 | Dissolved |
| GREAT YARMOUTH POWER LIMITED | 03233751 | 01/07/2010 | 29/06/2012 | Dissolved |
| MUSIC ALIVE | 04441222 | 07/12/2005 | 30/06/2011 | Strike Off |
| MUSIC ALIVE | 04441222 | 13/09/2005 | 30/06/2011 | Strike Off |
| NPOWER BUSINESS AND SOCIAL HOUSING LIMITED | 00893718 | 30/01/2009 | 31/12/2016 | Dissolved |
| NPOWER COMMERCIAL GAS LIMITED | 03768856 | 22/09/2000 | 31/12/2016 | Silver |
| NPOWER FINANCIAL SERVICES LIMITED | 03925068 | 14/02/2000 | 31/12/2016 | Dissolved |
| NPOWER GAS LIMITED | 02999919 | 22/09/2000 | 31/12/2016 | Not Trading |
| NPOWER GROUP LIMITED | 08241182 | 05/10/2012 | 31/12/2012 | Bronze |
| NPOWER LIMITED | 03653277 | 22/09/2000 | 31/12/2016 | Silver |
| NPOWER NORTHERN LIMITED | 03432100 | 02/11/1998 | 31/12/2016 | Not Trading |
| NPOWER NORTHERN SUPPLY LIMITED | 02845740 | 01/10/2001 | 31/12/2016 | Not Trading |
| NPOWER YORKSHIRE LIMITED | 03937808 | 30/06/2006 | 31/12/2016 | Not Trading |
| NPOWER YORKSHIRE SUPPLY LIMITED | 04212116 | 30/06/2006 | 31/12/2016 | Not Trading |
| NPOWER YORKSHIRE SUPPLY LIMITED | 04212116 | 20/11/2006 | 29/06/2012 | Not Trading |
| OCTOPUS ELECTRICAL LIMITED | 00830299 | 30/01/2009 | 31/12/2016 | Dissolved |
| PEEL ENERGY CCS LIMITED | 06714827 | 25/11/2008 | 17/12/2009 | Dissolved |
| PLUS SHIPPING SERVICES LIMITED | 04508350 | 31/03/2006 | 31/12/2016 | Amber |
| REBYL LIMITED | 04043701 | 31/07/2000 | 17/12/2014 | Dissolved |
| REGENESYS HOLDINGS LIMITED | 04043585 | 31/07/2000 | 15/09/2017 | Dissolved |
| REGENESYS HOLDINGS LIMITED | 04043585 | 23/12/2003 | 29/06/2012 | Dissolved |
| REGENESYS TECHNOLOGIES | 03527866 | 06/12/2002 | 15/09/2017 | Dissolved |
| RWE COGEN UK LIMITED | 02624987 | 30/06/2006 | 24/06/2019 | Dissolved |
| RWE COGEN UK TRADING LIMITED | 02745602 | 30/06/2006 | 15/09/2017 | Dissolved |
| RWE RENEWABLES UK HOLDINGS LIMITED | 06451278 | 12/12/2007 | 01/10/2009 | Gold |
| SCARCROFT INVESTMENTS LIMITED | 02798178 | 19/09/2001 | 31/12/2016 | Dissolved |
| SCARCROFT INVESTMENTS LIMITED | 02798178 | 12/08/2005 | 29/06/2012 | Dissolved |
| SUPERIOR PLUMBING INSTALLATIONS HOLDINGS LIMITED | 05982875 | 30/01/2009 | 30/01/2009 | Dissolved |
| SWINDON CULTURAL PARTNERSHIP LIMITED | 05805204 | 20/11/2006 | 31/03/2010 | Dissolved |
| UNITI LIMITED | 03653096 | 27/07/2004 | 19/12/2012 | Dissolved |
| UNITI LIMITED | 03653096 | 27/07/2004 | 29/06/2012 | Dissolved |