| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| EAST COAST TRAINS LIMITED | 08765536 | 16/05/2024 | Silver |
| EAST WEST RAIL LIMITED | 04066321 | 31/12/2016 | Dissolved |
| EVOLUTIONARY RAIL LIMITED | 07153323 | 31/12/2016 | Amber |
| FIRST CALEDONIAN SLEEPER LIMITED | SC449171 | 31/12/2016 | Dissolved |
| FIRST CAPITAL CONNECT LIMITED | 05281077 | 31/12/2016 | Amber |
| FIRST CROSS COUNTRY LIMITED | 03467120 | 31/12/2016 | Dissolved |
| FIRST DUBLIN METRO LIMITED | 03719564 | 31/12/2016 | Dissolved |
| FIRST EAST MIDLANDS LIMITED | 03459817 | 31/12/2016 | Dissolved |
| FIRST GREAT WESTERN TRAINS LIMITED | 07839265 | 31/12/2016 | Dissolved |
| FIRST LONDON CABLEWAY LIMITED | 15537221 | 02/03/2024 | Amber |
| FIRST MTR SOUTH WESTERN TRAINS LIMITED | 07900320 | 15/06/2016 | Bronze |
| FIRST RAIL (COMMUTER) LIMITED | 08485758 | 31/12/2016 | Dissolved |
| FIRST RAIL HOLDINGS LIMITED | 05154485 | 28/09/2015 | Silver |
| FIRST RAIL PROCUREMENT LIMITED | 02996875 | 31/12/2016 | Gold |
| FIRST RAIL STIRLING HOLDINGS LIMITED | 14911720 | 09/08/2024 | Bronze |
| FIRST RAIL STIRLING LIMITED | 11408012 | 09/08/2024 | One Red Flag |
| FIRST RAIL WALES AND WESTERN HOLDINGS LIMITED | 14911551 | 22/11/2024 | Bronze |
| FIRST RAIL WALES AND WESTERN LIMITED | 14653926 | 22/11/2024 | Gold |
| FIRST SCOTRAIL LIMITED | SC185018 | 31/12/2016 | Amber |
| FIRST SCOTRAIL RAILWAYS LIMITED | SC455326 | 31/12/2016 | Dissolved |
| FIRST THAMESLINK LIMITED | 07839260 | 31/12/2016 | Dissolved |
| FIRST TRAINS LIMITED | 03514178 | 31/12/2016 | Dissolved |
| FIRST TRANSPENNINE EXPRESS LIMITED | 09111801 | 28/09/2015 | Amber |
| FIRST TRENITALIA EAST MIDLANDS RAIL LIMITED | 10557872 | 11/01/2017 | Dissolved |
| FIRST/KEOLIS HOLDINGS LIMITED | 04113984 | 08/10/2015 | Gold |
| FIRST/KEOLIS TRANSPENNINE HOLDINGS LIMITED | 04113990 | 08/10/2015 | Gold |
| FIRST/KEOLIS TRANSPENNINE LIMITED | 04113923 | 08/10/2015 | Gold |
| GB EXTENDED VENTURES LIMITED | 03537904 | 31/12/2016 | Dissolved |
| GB RAILWAYS GROUP LIMITED | 03263210 | 31/07/2024 | Gold |
| GB RAILWAYS LIMITED | 03027949 | 31/12/2016 | Dissolved |
| GREAT WESTERN TRUSTEES LIMITED | 03161093 | 31/12/2016 | Dissolved |
| RAIL PARTNERS LIMITED | 13894712 | 24/05/2022 | Silver |
| TRAM OPERATIONS LIMITED | 03097532 | 13/10/2015 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| EAST COAST TRAINS LIMITED | 08765536 | 31/12/2016 | 06/01/2020 | Silver |
| FIRST CUSTOMER CONTACT LIMITED | 07939526 | 31/12/2016 | 06/01/2020 | One Red Flag |
| FIRST GREATER WESTERN LIMITED | 05113733 | 07/10/2015 | 22/11/2024 | Silver |
| FIRST TRENITALIA WEST COAST RAIL LIMITED | 10349442 | 27/08/2016 | 15/05/2024 | Silver |
| FK CROSS LONDON LIMITED | 15530283 | 28/02/2024 | 05/07/2024 | Amber |
| HULL TRAINS COMPANY LIMITED | 03715410 | 05/10/2015 | 06/01/2020 | Gold |
| MISTRAL DATA LIMITED | 07153287 | 28/09/2015 | 22/02/2024 | Gold |
| THE SCOTTISH COUNCIL FOR DEVELOPMENT AND INDUSTRY | SC024724 | 27/02/2013 | 14/05/2018 | Amber |
| TOTALJOURNEY LIMITED | 04103605 | 31/12/2016 | 20/11/2024 | Not Trading |