| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Forestgen Ltd | 02859388 | 04/11/1993 | Dissolved |
| Midlands Hydrocarbons (Pakistan) Ltd | 03095028 | 10/10/1995 | Dissolved |
| Midlands Investments Ltd | 02475225 | 21/06/1993 | Dissolved |
| Midlands Power (Bangladesh) Ltd | 03095037 | 10/10/1995 | Dissolved |
| Midlands Power (One) Ltd | 02855919 | 04/11/1993 | Dissolved |
| Midlands Power (Pakistan) Ltd | 03095065 | 10/10/1995 | Dissolved |
| Midlands Power (Philippines) Ltd | 02814645 | 07/06/1993 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AQUILA POWER INVESTMENTS LIMITED | 03600770 | 12/12/2000 | 08/05/2002 | Dissolved |
| AVON ENERGY PARTNERS HOLDINGS | 03196714 | 27/09/1999 | 08/05/2002 | Dissolved |
| AVON ENERGY PARTNERS LIMITED | 03194917 | 27/09/1999 | 08/05/2002 | Dissolved |
| Birmingham Royal Ballet Trust | 03160256 | 19/05/1999 | 15/03/2004 | Dissolved |
| CYANCONNODE HOLDINGS PLC | 04554942 | 06/07/2005 | 03/10/2007 | Amber |
| E.ON ENERGY UK LIMITED | 02820647 | 09/07/1993 | 08/05/2002 | Dissolved |
| EA TECHNOLOGY LIMITED | 02566313 | 26/07/1993 | 29/10/2014 | Silver |
| ELECTRICITY ASSOCIATION SERVICES LIMITED | 02366837 | 01/04/1999 | 14/05/2002 | Dissolved |
| ELECTRICITY NORTH WEST LIMITED | 02366949 | 25/04/2008 | 10/10/2008 | Silver |
| Electricity Association Ltd | 02367010 | 21/06/1993 | 14/05/2002 | Dissolved |
| I M POWER PLC | 13276733 | 19/11/2022 | 17/02/2024 | Amber |
| INTERNATIONAL POWER (UCH) | 03095019 | 10/10/1995 | 08/05/2002 | Dissolved |
| INTERNATIONAL POWER (UCH) SERVICES LIMITED | 03141679 | 01/12/1996 | 08/05/2002 | Gold |
| MAGNOLIA POWER (TPL) | 02579333 | 01/02/1993 | 08/05/2002 | Dissolved |
| MIDLANDS GENERATION (OVERSEAS) LIMITED | 02772596 | 19/02/1993 | 08/05/2002 | Dissolved |
| MIDLANDS POWER (UK) LIMITED | 02251099 | 11/01/1993 | 08/05/2002 | Dissolved |
| MIDLANDS POWER INTERNATIONAL LIMITED | 02618314 | 07/12/1992 | 08/05/2002 | Dissolved |
| MIDLANDS SALES LIMITED | 02573405 | 21/06/1993 | 08/05/2002 | Dissolved |
| MPORIUM GROUP PLC | 08696120 | 11/12/2013 | 29/09/2015 | Insolvent |
| Meb (Overseas) Ltd | 03504998 | 08/04/1998 | 08/05/2002 | Dissolved |
| Midlands Electricity International Ltd | 02855831 | 29/10/1993 | 02/03/1998 | Dissolved |
| Midlands Hydrocarbons (Bangladesh) Ltd | 02831144 | 14/07/1993 | 31/03/1998 | Dissolved |
| Midlands Power (Consultancy) Ltd | 02585916 | 26/02/1993 | 08/05/2002 | Dissolved |
| Midlands Power (Europe) Ltd | 02776789 | 01/12/1996 | 08/05/2002 | Dissolved |
| Midlands Power (H P L) Ltd | 02598875 | 07/12/1992 | 08/05/2002 | Dissolved |
| Midlands Power (Hungary) Ltd | 03095043 | 24/11/1995 | 08/05/2002 | Dissolved |
| Midlands Power (Indus) Ltd | 03094893 | 24/11/1995 | 08/05/2002 | Dissolved |
| NATIONAL GRID ELECTRICITY DISTRIBUTION (WEST MIDLANDS) PLC | 03600574 | 29/05/2001 | 08/05/2002 | Silver |
| NATIONAL GRID ELECTRICITY DISTRIBUTION MIDLANDS LIMITED | 02366928 | 25/10/1992 | 08/05/2002 | Silver |
| Npgt Ltd | 03596760 | 12/04/2001 | 08/05/2002 | Dissolved |
| OCTAGON COMPUTER CENTRE LIMITED | 02716219 | 16/08/1999 | 01/07/2004 | Dissolved |
| OXFORD INSTRUMENTS PLC | 00775598 | 01/11/2004 | 10/09/2013 | Gold |
| SOUTH STAFFORDSHIRE PLC | 04295398 | 06/04/2004 | 26/03/2010 | One Red Flag |
| SOUTH STAFFORDSHIRE WATER PLC | 02662742 | 21/12/2004 | 02/04/2015 | Bronze |
| STAFFORDSHIRE UNIVERSITY ENTERPRISES LIMITED | 02359999 | 16/08/1999 | 01/07/2004 | Dissolved |
| THE UNIVERSITIES AND COLLEGES EMPLOYERS' ASSOCIATION | 02914327 | 07/12/2000 | 31/08/2004 | Silver |
| WPD MIDLANDS PROPERTIES LIMITED | 03600545 | 29/05/2001 | 08/05/2002 | Dissolved |