| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Metropolitan Power Limited | 02504328 | 12/05/1992 | Dissolved |
| Metropower Ltd | 02557760 | 13/11/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CITIPRODUCTS LIMITED | 02864520 | 26/03/1996 | 13/11/1998 | Dissolved |
| ELECTRICITY SUPPLY NOMINEES (SCOTLAND) LIMITED | SC042623 | 01/03/1989 | 31/05/1999 | One Red Flag |
| Electricity Association Ltd | 02367010 | 21/10/1994 | 08/02/1995 | Dissolved |
| GENSCOT LIMITED | SC113222 | 14/11/1996 | 31/05/1999 | Dissolved |
| GHH ACQUISITIONS LTD | 09454130 | 29/06/2015 | 29/03/2018 | Silver |
| GHH ACQUISITIONS MIDCO LTD | 09454127 | 29/06/2015 | 29/03/2018 | One Red Flag |
| GHH GROUP HOLDINGS LTD | SC540972 | 22/07/2016 | 29/03/2018 | Bronze |
| GREEN HIGHLAND RENEWABLES LTD | SC315779 | 22/04/2015 | 29/03/2018 | Silver |
| Houston Engineers Ltd | SC053614 | 06/09/1999 | 11/07/2000 | Dissolved |
| INCHCAPE INVESTMENTS AND ASSET MANAGEMENT LIMITED | SC113224 | 26/07/1996 | 25/11/1996 | Silver |
| MOTHERWELL BRIDGE HOLDINGS LIMITED | SC003779 | 29/10/1997 | 20/05/2003 | Dissolved |
| ROSYTH REGENERATION LIMITED | SC152258 | 21/03/1995 | 26/08/1999 | Dissolved |
| SCOTTISH POWER LIMITED | SC193794 | 29/03/1999 | 31/05/1999 | Bronze |
| SCOTTISH POWER TRUSTEES LIMITED | SC130700 | 02/04/1991 | 22/08/1994 | Dissolved |
| SCOTTISH POWER UK PLC | SC117120 | 27/03/1990 | 31/05/1999 | Bronze |
| SCOTTISHPOWER ENERGY RETAIL LIMITED | SC190287 | 01/12/1998 | 31/05/1999 | Silver |
| SCOTTISHPOWER INVESTMENTS LIMITED | SC155873 | 15/03/1995 | 31/05/1999 | Dissolved |
| SIMEC GHR ACQUISITIONS TOPCO LIMITED | 09454126 | 20/04/2015 | 29/03/2018 | Amber |
| SMW LIMITED | SC165988 | 08/06/1998 | 31/05/1999 | Gold |
| SOUTHERN WATER LIMITED | 02366620 | 07/08/1996 | 31/05/1999 | Silver |
| SP DISTRIBUTION PLC | SC189125 | 01/12/1998 | 31/05/1999 | Silver |
| SP GAS LIMITED | SC170918 | 26/02/1997 | 31/05/1999 | Dissolved |
| SP MANWEB PLC | 02366937 | 12/10/1995 | 31/05/1999 | Bronze |
| SP TRANSMISSION PLC | SC189126 | 01/12/1998 | 31/05/1999 | Silver |
| Scottish Electricity Settlements Ltd | SC169212 | 16/10/1996 | 31/05/1999 | Dissolved |
| Scottishpower Leasing Ltd | SC142337 | 10/05/1993 | 22/08/1994 | Dissolved |
| Scottishpower Telecommunications Ltd | SC143862 | 24/11/1995 | 31/05/1999 | Dissolved |
| THE WEIR GROUP PENSION TRUST LIMITED | SC059085 | 07/06/1999 | 11/07/2000 | Not Trading |
| VPI POWER LIMITED | SC189124 | 01/12/1998 | 31/05/1999 | Silver |
| WALES & WEST GAS NETWORKS (HOLDINGS) LIMITED | 05095454 | 23/11/2004 | 31/12/2011 | Silver |
| WALES & WEST GAS NETWORKS (JUNIOR FINANCE) LIMITED | 05149491 | 23/11/2004 | 31/12/2011 | Dissolved |
| WALES & WEST GAS NETWORKS (SENIOR FINANCE) LIMITED | 05149493 | 23/11/2004 | 31/12/2011 | Dissolved |
| WALES & WEST UTILITIES FINANCE PLC | 06766848 | 26/05/2010 | 31/12/2011 | Silver |
| WALES & WEST UTILITIES HOLDINGS LIMITED | 07092596 | 09/03/2010 | 31/12/2011 | Silver |
| WALES & WEST UTILITIES LIMITED | 05046791 | 01/06/2005 | 31/12/2011 | Silver |
| WEIR GROUP PLC(THE) | SC002934 | 01/06/1999 | 11/07/2000 | Silver |
| WEIR GROUP SENIOR EXECUTIVES PENSION TRUST LIMITED (THE) | SC060549 | 07/06/1999 | 11/07/2000 | Dissolved |
| WINNINGTON COMBINED HEAT AND POWER OPERATIONS LIMITED | 03045124 | 14/11/1995 | 31/05/1999 | Dissolved |
| Winnington Combined Heat & Power Ltd | 03006441 | 14/11/1995 | 31/05/1999 | Dissolved |