| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALSTOM TRANSPORTATION PROJECTS INTERNATIONAL LTD | 00964379 | 17/02/2014 | Dissolved |
| BOMBARDIER TRANSPORTATION (GAUTRAIN) UK LIMITED | 03138093 | 29/07/2021 | Dissolved |
| BOMBARDIER TRANSPORTATION (SIGNAL) UK LTD | 03062720 | 29/07/2021 | Dissolved |
| MALTINGS COURT RTM COMPANY LIMITED | 07609134 | 19/04/2011 | Not Trading |
| SETML TRANSPORTATION LIMITED | 03138390 | 29/07/2021 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABC ELECTRIFICATION LTD | 08193420 | 10/11/2015 | 27/09/2024 | Gold |
| ALSTOM (INVESTMENT) UK LIMITED | 09863932 | 22/12/2021 | 18/12/2024 | Silver |
| ALSTOM (LITCHURCH) LIMITED | 01712661 | 29/07/2021 | 19/12/2024 | Silver |
| ALSTOM ACADEMY FOR RAIL | 00293588 | 29/07/2021 | 19/12/2024 | Not Trading |
| ALSTOM ELECTRONICS LIMITED | 02988520 | 29/07/2021 | 19/12/2024 | Amber |
| ALSTOM ENGINEERING AND SERVICES LIMITED | 02235994 | 29/07/2021 | 19/12/2024 | Amber |
| ALSTOM NL SERVICE PROVISION LTD | 02849400 | 29/07/2021 | 19/12/2024 | Silver |
| ALSTOM PRODUCT AND SERVICES LIMITED | 05894128 | 09/07/2015 | 28/04/2021 | Bronze |
| ALSTOM TRANSPORT SERVICE LTD | 02849471 | 29/07/2021 | 19/12/2024 | Not Trading |
| ALSTOM TRANSPORT UK (HOLDINGS) LIMITED | 08713765 | 29/07/2021 | 18/12/2024 | Gold |
| ALSTOM TRANSPORT UK LIMITED | 08462831 | 29/07/2021 | 19/12/2024 | Silver |
| ALSTOM TRANSPORTATION (GLOBAL HOLDING) UK LIMITED | 09862744 | 23/11/2021 | 19/12/2024 | Gold |
| ALSTOM UK PENSION TRUSTEE LIMITED | 09051042 | 01/10/2021 | 01/12/2024 | Not Trading |
| ARABELLE MARINE UK LIMITED | 08462333 | 10/12/2014 | 12/11/2015 | One Red Flag |
| ARABELLE SERVICES UK LIMITED | 04347573 | 03/11/2014 | 12/11/2015 | Bronze |
| CROSSFLEET LIMITED | 03614181 | 29/07/2021 | 19/12/2024 | Bronze |
| GE POWER RESOURCES MANAGEMENT LTD | 00540682 | 16/10/2014 | 01/12/2015 | Dissolved |
| GE POWER UK | 00778482 | 16/10/2014 | 01/12/2015 | Not Trading |
| GE RENEWABLE UK (HOLDINGS) LTD | 08713762 | 10/12/2014 | 01/12/2015 | Dissolved |
| GENERAL ELECTRIC ENERGY UK LIMITED | 04267931 | 16/10/2014 | 01/12/2015 | Bronze |
| GENERAL ELECTRIC UK HOLDINGS LTD. | 04267912 | 16/10/2014 | 01/12/2015 | Gold |
| INFRASIG LIMITED | 08018007 | 29/07/2021 | 19/12/2024 | Gold |
| NOMAD HOLDINGS LIMITED | 05871463 | 05/01/2017 | 23/08/2024 | Gold |
| PRORAIL LIMITED | 01314819 | 29/07/2021 | 19/12/2024 | Amber |
| SLB14 UK LIMITED | 07847458 | 03/11/2014 | 26/09/2017 | Dissolved |
| SOUTH EASTERN TRAIN MAINTENANCE LIMITED | 03341029 | 29/07/2021 | 19/12/2024 | Not Trading |
| WEST COAST SERVICE PROVISION LIMITED | 03602414 | 29/07/2021 | 19/12/2024 | Gold |
| WEST COAST TRAINCARE LIMITED | 03602374 | 29/07/2021 | 19/12/2024 | Gold |