| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CNRE LIMITED | 06264169 | 06/06/2007 | Dissolved |
| GRAND NORTH EASTERN RAILWAY COMPANY LIMITED | 06592625 | 12/06/2008 | Dissolved |
| GRAND NORTHERN RAILWAY COMPANY LIMITED | 06488899 | 10/06/2008 | Dissolved |
| HINTON GROVE LIMITED | 07989434 | 14/03/2012 | Silver |
| Sovereign Hst Ltd | 06457387 | 16/01/2008 | Dissolved |
| TRAIN FLEET (2019) LIMITED | 12000794 | 31/07/2019 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Asc Nex Ltd | 03443181 | 01/03/1999 | 26/11/2003 | Dissolved |
| CALEDONIAN SLEEPER LIMITED | SC328825 | 26/05/2022 | 28/06/2024 | One Red Flag |
| CSRE LIMITED | 05732087 | 14/06/2007 | 01/11/2010 | Dissolved |
| Cardiff Railway Co Ltd | 03007927 | 01/03/1999 | 19/04/2004 | Dissolved |
| FIRST/KEOLIS TRANSPENNINE HOLDINGS LIMITED | 04113990 | 27/11/2014 | 04/08/2017 | Gold |
| FIRST/KEOLIS TRANSPENNINE LIMITED | 04113923 | 27/11/2014 | 04/08/2017 | Gold |
| GCRC HOLDINGS LIMITED | 06036740 | 13/06/2007 | 31/01/2012 | Dissolved |
| GRAND CENTRAL RAILWAY COMPANY LIMITED | 03979826 | 21/05/2007 | 31/01/2012 | Silver |
| GRAND UNION RAILWAY COMPANY LIMITED | 05851210 | 04/06/2008 | 04/11/2011 | Dissolved |
| GURC HOLDINGS LIMITED | 06036741 | 04/06/2008 | 04/11/2011 | Dissolved |
| KEOLIS (UK) LIMITED | 03292357 | 11/07/2014 | 04/08/2017 | Silver |
| KEOLIS (UK) PROJECTS LIMITED | 09693364 | 20/07/2015 | 04/08/2017 | Dissolved |
| KEOLIS AMEY DOCKLANDS LIMITED | 09113304 | 02/07/2014 | 04/08/2017 | Bronze |
| KEOLIS AMEY METROLINK LIMITED | 09871073 | 11/01/2017 | 04/08/2017 | One Red Flag |
| KEOLIS EFFIA BIKE LIMITED | 09531674 | 08/04/2015 | 04/08/2017 | Dissolved |
| KEOLIS GO-AHEAD LIMITED | 09116860 | 04/07/2014 | 04/08/2017 | Dissolved |
| LOKEGO LIMITED | 07168348 | 12/02/2014 | 04/08/2017 | Dissolved |
| LONDON NORTH EASTERN RAILWAY LIMITED | 04659712 | 20/07/2018 | 30/11/2018 | Bronze |
| NE NO.2 LTD | 03011029 | 01/03/1999 | 24/07/2003 | Not Trading |
| NOTTINGHAM TRAMS LIMITED | 07644670 | 29/07/2014 | 04/08/2017 | Gold |
| SCOTRAIL TRAINS LIMITED | SC328826 | 21/03/2022 | 28/06/2024 | Bronze |
| SCOTTISH RAIL HOLDINGS LIMITED | SC548826 | 21/03/2022 | 28/06/2024 | Bronze |
| SOVEREIGN TRAINS LIMITED | 06004393 | 21/05/2007 | 04/11/2011 | Dissolved |
| VIRGIN RAIL PROJECTS LIMITED | 04162993 | 19/07/2006 | 13/11/2006 | Dissolved |