| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| KAL PORTFOLIO TRADING LIMITED | 08737324 | 03/09/2018 | Not Trading |
| KENSINGTON METER ASSETS LTD | 14306708 | 19/08/2022 | One Red Flag |
| POWER 48 LTD | 11351933 | 09/05/2018 | Dissolved |
| YU WATER LIMITED | 09918643 | 03/09/2018 | One Red Flag |
| YÜ ENERGY HOLDING LIMITED | 08205335 | 03/09/2018 | Bronze |
| YÜ ENERGY RETAIL LIMITED | 08246810 | 03/09/2018 | Silver |
| YÜ GROUP PLC | 10004236 | 03/09/2018 | Silver |
| YÜ PROPCO LEICESTER LTD | 14307346 | 19/08/2022 | Not Trading |
| YÜ PROPCO NOTTINGHAM LTD | 15994888 | 03/10/2024 | Amber |
| YÜ SERVICES LIMITED | 11440201 | 22/10/2019 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BIRMINGHAM DISTRICT ENERGY COMPANY LIMITED | 05988953 | 15/12/2014 | 09/01/2018 | One Red Flag |
| BLOOMSBURY HEAT & POWER LIMITED | 03626472 | 15/12/2014 | 09/01/2018 | Bronze |
| BRING ENERGY CONCESSIONS LIMITED | 02240219 | 16/12/2014 | 09/01/2018 | One Red Flag |
| BRING ENERGY LIMITED | 01506399 | 16/12/2014 | 09/01/2018 | One Red Flag |
| BRING ENERGY SERVICES LIMITED | 04513466 | 16/12/2014 | 09/01/2018 | One Red Flag |
| C3 RESOURCES LTD | 04938457 | 01/01/2016 | 09/01/2018 | Gold |
| COFATHEC ENERGY LIMITED | 05471846 | 18/07/2013 | 09/01/2018 | Dissolved |
| COFATHEC ENERGY SERVICES LIMITED | 04469600 | 18/07/2013 | 09/01/2018 | Insolvent |
| COLLEDGE TRUNDLE & HALL LIMITED | 03221816 | 16/12/2014 | 09/01/2018 | Bronze |
| COVENTRY DISTRICT ENERGY COMPANY LIMITED | 08090838 | 16/12/2014 | 09/01/2018 | One Red Flag |
| EAST LONDON ENERGY LIMITED | 06307742 | 16/12/2014 | 09/01/2018 | One Red Flag |
| ENGIE GAS LIMITED | 03814495 | 01/01/2016 | 09/01/2018 | Bronze |
| ENGIE GAS SHIPPER LIMITED | 03814488 | 01/01/2016 | 09/01/2018 | One Red Flag |
| ENGIE HOME LIMITED | 03814480 | 01/01/2016 | 09/01/2018 | Dissolved |
| ENGIE IMPACT UK LIMITED | 03820315 | 16/01/2017 | 16/01/2017 | Bronze |
| ENGIE POWER LIMITED | 04236804 | 01/01/2016 | 09/01/2018 | One Red Flag |
| ENGIE SUPPLY HOLDING UK LIMITED | 02706333 | 01/01/2016 | 09/01/2018 | Bronze |
| EQUANS FM LIMITED | 00665702 | 14/03/2016 | 09/01/2018 | Bronze |
| EQUANS SERVICES LIMITED | 00598379 | 14/03/2016 | 09/01/2018 | Silver |
| EXCEL DISTRICT ENERGY COMPANY LIMITED | 08341688 | 16/12/2014 | 09/01/2018 | One Red Flag |
| GOWER STREET HEAT AND POWER LIMITED | 04070944 | 16/12/2014 | 09/01/2018 | Dissolved |
| INDUSTRIAL ENERGY SERVICES LIMITED | 01732859 | 01/01/2012 | 09/01/2018 | One Red Flag |
| INDUSTRIELLE DE CHAUFFAGE ENTERPRISE UNITED KINGDOM LIMITED | 03463584 | 16/12/2014 | 09/01/2018 | Dissolved |
| INTERNATIONAL POWER RETAIL SUPPLY COMPANY (UK) LIMITED | 06346398 | 01/01/2016 | 09/01/2018 | One Red Flag |
| IPM ENERGY RETAIL LIMITED | 06054816 | 01/01/2016 | 09/01/2018 | Amber |
| LEICESTER DISTRICT ENERGY COMPANY LIMITED | 05847251 | 16/12/2014 | 09/01/2018 | Bronze |
| POWER EFFICIENCY HOLDINGS LIMITED | 06444915 | 12/12/2013 | 09/01/2018 | Gold |
| SOUTHAMPTON GEOTHERMAL HEATING COMPANY LIMITED(THE) | 02053176 | 16/12/2014 | 09/01/2018 | One Red Flag |