| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Npower Communications Ltd | 03925119 | 01/10/2007 | Dissolved |
| Npower Customer Services Ltd | 03938730 | 01/10/2007 | Dissolved |
| Npower Energy Sales Ltd | 03787887 | 01/10/2007 | Dissolved |
| RWE SOLUTIONS UK LIMITED | 01142192 | 01/10/2007 | Dissolved |
| Virtutel Ltd | 03732775 | 01/10/2007 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| E.ON NEXT ENERGY LIMITED | 03782443 | 01/10/2007 | 29/04/2012 | Silver |
| ELECTRICITY PLUS SUPPLY LIMITED | 05199936 | 01/10/2007 | 29/04/2012 | Bronze |
| GAS PLUS SUPPLY LIMITED | 05199935 | 01/10/2007 | 29/04/2012 | Bronze |
| NPOWER COMMERCIAL GAS LIMITED | 03768856 | 01/10/2007 | 29/04/2012 | Silver |
| NPOWER FINANCIAL SERVICES LIMITED | 03925068 | 01/10/2007 | 29/04/2012 | Dissolved |
| NPOWER GAS LIMITED | 02999919 | 01/10/2007 | 29/04/2012 | Not Trading |
| NPOWER LIMITED | 03653277 | 01/10/2007 | 29/04/2012 | Silver |
| NPOWER NORTHERN LIMITED | 03432100 | 01/10/2007 | 29/04/2012 | Not Trading |
| NPOWER NORTHERN SUPPLY LIMITED | 02845740 | 01/10/2007 | 29/04/2012 | Not Trading |
| NPOWER RENEWABLES AND CONSOLIDATION SERVICES LIMITED | 02842079 | 01/10/2007 | 28/06/2010 | Dissolved |
| NPOWER YORKSHIRE LIMITED | 03937808 | 01/10/2007 | 29/04/2012 | Not Trading |
| PLUS SHIPPING SERVICES LIMITED | 04508350 | 01/10/2007 | 29/04/2012 | Amber |
| REBYL LIMITED | 04043701 | 01/10/2007 | 29/04/2012 | Dissolved |
| YE GAS LIMITED | 02571590 | 01/10/2007 | 29/04/2012 | Dissolved |
| YORKSHIRE ENERGY LIMITED | 02571588 | 01/10/2007 | 29/04/2012 | Dissolved |