| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| KEOLIS (UK) PROJECTS LIMITED | 09693364 | 20/07/2015 | Dissolved |
| KEOLIS EFFIA BIKE LIMITED | 09531674 | 08/04/2015 | Dissolved |
| KEOLIS GO-AHEAD HOLDINGS LIMITED | 09115596 | 03/07/2014 | Dissolved |
| KEOLIS MERSEYSIDE LIMITED | 05406961 | 22/05/2010 | Dissolved |
| KEOLIS/EUROSTAR EAST COAST LIMITED | 08758112 | 01/11/2013 | Dissolved |
| KEOLIS/SNCF WEST COAST LIMITED | 07534083 | 17/02/2011 | Dissolved |
| LOKEGO LIMITED | 07168348 | 24/02/2010 | Dissolved |
| LONDON & EAST MIDLANDS RAILWAY LIMITED | 05814586 | 04/12/2009 | Dissolved |
| LONDON AND SOUTH EAST PASSENGER RAIL SERVICES LIMITED | 06537238 | 04/12/2009 | Dissolved |
| LONDON AND WEST MIDLANDS RAILWAY LIMITED | 05537947 | 07/08/2006 | Dissolved |
| MERSEYTRAM 2006 LIMITED | 05503299 | 22/05/2010 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| FIRST/KEOLIS TRANSPENNINE LIMITED | 04113923 | 17/04/2008 | 27/11/2014 | Gold |
| GOVIA THAMESLINK RAILWAY LIMITED | 07934306 | 14/05/2014 | 13/04/2022 | One Red Flag |
| KEOLIS AMEY DOCKLANDS LIMITED | 09113304 | 02/07/2014 | 23/01/2020 | Bronze |
| KEOLIS AMEY METROLINK LIMITED | 09871073 | 17/11/2015 | 23/01/2020 | One Red Flag |
| KEOLIS AMEY OPERATIONS / GWEITHREDIADAU KEOLIS AMEY LIMITED | 11389531 | 30/05/2018 | 28/01/2020 | Gold |
| KEOLIS AMEY RAIL LIMITED | 11391059 | 26/09/2018 | 28/01/2022 | Bronze |
| NOTTINGHAM TRAMS LIMITED | 07644670 | 24/05/2011 | 17/04/2012 | Gold |
| RAIL DELIVERY GROUP LIMITED | 08176197 | 15/10/2018 | 30/06/2021 | Bronze |
| TRAMLINK NOTTINGHAM (FINCO) LIMITED | 07865421 | 06/12/2011 | 13/02/2018 | One Red Flag |
| TRAMLINK NOTTINGHAM (HOLDINGS) LIMITED | 07595316 | 30/11/2011 | 13/02/2018 | One Red Flag |
| TRAMLINK NOTTINGHAM LIMITED | 07599425 | 30/11/2011 | 13/02/2018 | One Red Flag |