| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| JUST BUSINESS DATA LIMITED | 09760893 | 01/04/2016 | Dissolved |
| SIMPLY STUDENT ACCOMMODATION LTD | 07762592 | 05/09/2011 | Dissolved |
| THE UTILITY GROUP LIMITED | 09726256 | 10/03/2016 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BIZZENERGY GROUP LIMITED | 03961214 | 12/11/2003 | 11/05/2007 | Dissolved |
| BIZZENERGY LIMITED | 03961223 | 12/11/2003 | 11/05/2007 | Dissolved |
| E.ON NEXT ENERGY LIMITED | 03782443 | 13/09/2000 | 24/09/2002 | Silver |
| MY HOME MOVE LTD | 03874320 | 01/08/2001 | 24/09/2002 | Amber |
| NORTHERN POWERGRID (YORKSHIRE) PLC | 04112320 | 06/06/2001 | 21/09/2001 | Gold |
| NOVA DESIGN PARTNERSHIP LIMITED | 01843278 | 19/02/1992 | 11/11/1992 | Dissolved |
| NOVA DESIGN PARTNERSHIP LIMITED | 01843278 | 19/02/1992 | 11/11/1992 | Dissolved |
| NPOWER COMMERCIAL GAS LIMITED | 03768856 | 08/06/1999 | 24/09/2002 | Silver |
| NPOWER FINANCIAL SERVICES LIMITED | 03925068 | 31/03/2001 | 24/09/2002 | Dissolved |
| NPOWER GAS LIMITED | 02999919 | 05/03/1999 | 24/09/2002 | Not Trading |
| NPOWER LIMITED | 03653277 | 08/06/1999 | 24/09/2002 | Silver |
| NPOWER NORTHERN LIMITED | 03432100 | 05/09/2001 | 24/09/2002 | Not Trading |
| NPOWER NORTHERN SUPPLY LIMITED | 02845740 | 01/07/2002 | 24/09/2002 | Not Trading |
| NPOWER YORKSHIRE LIMITED | 03937808 | 15/02/2001 | 24/09/2002 | Not Trading |
| NPOWER YORKSHIRE SUPPLY LIMITED | 04212116 | 02/08/2001 | 24/09/2002 | Not Trading |
| Npower Communications Ltd | 03925119 | 26/03/2001 | 24/09/2002 | Dissolved |
| Npower Customer Services Ltd | 03938730 | 28/02/2001 | 24/09/2002 | Dissolved |
| Npower Energy Ltd | 03824686 | 23/12/1999 | 24/09/2002 | Dissolved |
| Npower Energy Sales Ltd | 03787887 | 08/06/1999 | 24/09/2002 | Dissolved |
| Npower Retail Ltd | 04046599 | 31/07/2000 | 24/09/2002 | Dissolved |
| One Call At Home Ltd | 03968580 | 29/11/2002 | 09/06/2005 | Dissolved |
| RWE GENERATION UK HOLDINGS LIMITED | 03987817 | 04/07/2000 | 24/09/2002 | Gold |
| RWE GENERATION UK PLC | 03892782 | 03/07/2000 | 24/09/2002 | Gold |
| SCARCROFT INVESTMENTS LIMITED | 02798178 | 03/04/2001 | 24/09/2002 | Dissolved |
| SIMPLY BUSINESS ENERGY LIMITED | 08246610 | 10/10/2012 | 12/02/2016 | Gold |
| SPIRIT RESOURCES (ARMADA) LIMITED | 04181384 | 14/05/2001 | 30/11/2001 | Gold |
| SWITCH BUSINESS GROUP LTD | 07525561 | 10/02/2011 | 28/02/2022 | Amber |
| Scarcroft Leasing (Sep) | 02870840 | 03/04/2001 | 24/09/2002 | Dissolved |
| Virtutel Ltd | 03732775 | 28/02/2001 | 24/09/2002 | Dissolved |
| YE GAS LIMITED | 02571590 | 03/04/2001 | 24/09/2002 | Dissolved |
| YEDL LIMITED | 04112326 | 06/06/2001 | 21/09/2001 | Not Trading |
| YELECO 29 LIMITED | 02731916 | 03/04/2001 | 24/09/2002 | Dissolved |
| YORKSHIRE ELECTRICITY DISTRIBUTION SERVICES LIMITED | 04112332 | 06/06/2001 | 21/09/2001 | Dissolved |
| YORKSHIRE ELECTRICITY GROUP PLC | 02366995 | 03/04/2001 | 21/09/2001 | Silver |
| YORKSHIRE ENERGY LIMITED | 02571588 | 03/04/2001 | 24/09/2002 | Dissolved |
| YORKSHIRE HOLDINGS PLC | 03321179 | 03/04/2001 | 21/09/2001 | Dissolved |
| YORKSHIRE POWER GROUP LIMITED | 03227432 | 03/04/2001 | 21/09/2001 | Silver |
| Yeg Freshco. | 03178492 | 06/06/2001 | 24/09/2002 | Dissolved |
| Yorkshire Electric Power Ltd | 02260026 | 03/04/2001 | 24/09/2002 | Dissolved |
| Yorkshire Electricity Group Share Scheme Trustees Ltd | 02525146 | 03/04/2001 | 24/09/2002 | Dissolved |
| Yorkshire No. 1 Ltd | 04212123 | 02/08/2001 | 24/09/2002 | Dissolved |