| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALSTOM T&D DISTRIBUTION SWITCHGEAR LTD | 00158935 | 27/09/2017 | Dissolved |
| Areva T&d Power Electronics International Ltd | 02612364 | 18/12/2003 | Dissolved |
| COGELEX LIMITED | 05144942 | 03/06/2004 | Dissolved |
| GRID SOLUTIONS POWER ELECTRONIC SYSTEMS LIMITED | 00512211 | 17/07/2008 | Dissolved |
| LONG & CRAWFORD LIMITED | 00118040 | 23/12/2003 | Dissolved |
| PSYMETRIX LIMITED | SC171135 | 01/05/2017 | Dissolved |
| SLB14 UK LIMITED | 07847458 | 14/01/2014 | Dissolved |
| SLG14 UK LIMITED | 07365289 | 03/09/2010 | Dissolved |
| ST LEONARDS GRID SWITCHGEAR LIMITED | 00843406 | 23/12/2003 | Insolvent |
| ST LEONARDS SPR LIMITED | 02820803 | 01/07/2004 | Dissolved |
| ST LEONARDS SPR LIMITED | 02820803 | 23/12/2003 | Dissolved |
| ST LEONARDS TRANSMISSION UK LIMITED | 02491776 | 05/01/2009 | Dissolved |
| ST LEONARDS TRANSMISSION UK LIMITED | 02491776 | 13/12/2010 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALSTOM TRANSPORT UK (HOLDINGS) LIMITED | 08713765 | 01/10/2013 | 26/05/2015 | Gold |
| ALTAIR HOLDINGS UK LIMITED | 11296397 | 12/09/2018 | 27/03/2020 | Dissolved |
| ARABELLE MARINE UK LIMITED | 08462333 | 11/11/2013 | 26/05/2016 | One Red Flag |
| COGELEX LIMITED | 05144942 | 03/06/2004 | 04/05/2016 | Dissolved |
| DRIVES & CONTROLS SERVICES LTD | 05418759 | 18/10/2016 | 18/04/2019 | Dissolved |
| GE ENERGY POWER CONVERSION TECHNOLOGY LIMITED | 05921575 | 18/10/2016 | 18/04/2019 | Silver |
| GE ENERGY POWER CONVERSION UK HOLDINGS LIMITED | 06702141 | 18/10/2016 | 18/04/2019 | Amber |
| GE ENERGY POWER CONVERSION UK LIMITED | 05571739 | 18/10/2016 | 18/04/2019 | Bronze |
| GE INTELLIGENT PLATFORMS (BRACKNELL) LIMITED | 02393111 | 10/01/2018 | 31/03/2021 | Dissolved |
| GE INTELLIGENT PLATFORMS UK LIMITED | SC213037 | 10/01/2018 | 31/03/2021 | Dissolved |
| GE POWER CONVERSION BRAZIL HOLDINGS LIMITED | 02416188 | 18/10/2016 | 18/04/2019 | Strike Off |
| GE POWER RESOURCES MANAGEMENT LTD | 00540682 | 14/11/2011 | 26/06/2020 | Dissolved |
| GE POWER UK | 00778482 | 29/10/2015 | 26/06/2020 | Not Trading |
| GE RENEWABLE UK (HOLDINGS) LTD | 08713762 | 01/10/2013 | 26/05/2016 | Dissolved |
| GENERAL ELECTRIC ENERGY UK LIMITED | 04267931 | 04/02/2011 | 31/03/2021 | Bronze |
| GENERAL ELECTRIC UK HOLDINGS LTD. | 04267912 | 12/04/2011 | 26/06/2020 | Gold |
| GRID SOLUTIONS HVDC INDIA LIMITED | 02789805 | 01/07/2004 | 04/05/2016 | Insolvent |
| GRID SOLUTIONS HVDC INDIA LIMITED | 02789805 | 23/12/2003 | 27/09/2024 | Insolvent |
| GRID SOLUTIONS POWER ELECTRONIC SYSTEMS LIMITED | 00512211 | 17/07/2008 | 04/05/2016 | Dissolved |
| NEWCASTLE-UNDER-LYME SCHOOL | 06611453 | 06/12/2017 | 08/12/2022 | Silver |
| SCHNEIDER ELECTRIC ENERGY HOLDINGS UK LIMITED | 07364474 | 03/09/2010 | 31/12/2010 | Dissolved |
| SCHNEIDER ELECTRIC ENERGY UK LIMITED | 07364475 | 03/09/2010 | 31/12/2010 | Not Trading |
| UK GRID SOLUTIONS LIMITED | 04955841 | 31/12/2007 | 31/03/2021 | Bronze |
| UK GRID SOLUTIONS LIMITED | 04955841 | 24/12/2003 | 03/05/2016 | Bronze |
| WATER LANE TRUSTEES LIMITED | 04230684 | 12/10/2018 | 27/09/2024 | Not Trading |