| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ARRIVA RAIL LO LIMITED | 04165863 | 06/01/2025 | Not Trading |
| ARRIVA RAIL NORTH LIMITED | 04337712 | 01/03/2020 | Amber |
| ARRIVA TRAINS HOLDINGS LIMITED | 03076782 | 03/03/2017 | Silver |
| ARRIVA TRAINS WALES/TRENAU ARRIVA CYMRU LIMITED | 04337645 | 20/06/2019 | Silver |
| ARRIVA UK TRAINS LIMITED | 03166214 | 27/11/2024 | Silver |
| AT SEAT CATERING (2003) LIMITED | 04337740 | 20/06/2019 | Dissolved |
| GRAND CENTRAL RAILWAY COMPANY LIMITED | 03979826 | 01/10/2022 | Silver |
| LONDON AND NORTH WESTERN RAILWAY COMPANY LIMITED | 02880012 | 03/12/2020 | Silver |
| LONDON OVERGROUND RAIL OPERATIONS LTD | 05668786 | 18/07/2019 | Dissolved |
| M40 TRAINS LIMITED | 03005018 | 03/03/2017 | Silver |
| MTL SERVICES LIMITED | 03630737 | 27/11/2024 | Silver |
| RAIL SETTLEMENT PLAN LIMITED | 03069042 | 03/04/2020 | Bronze |
| WSMR (HOLDINGS) LIMITED | 05970324 | 03/03/2017 | Not Trading |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| THE CHILTERN RAILWAY COMPANY LIMITED | 03007939 | 03/03/2017 | 15/07/2019 | Silver |