| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| PORTERBROOK INVESTMENTS II LIMITED | 07664052 | 27/01/2015 | Dissolved |
| PORTERBROOK INVESTMENTS III LIMITED | 07664057 | 27/01/2015 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABBEY NATIONAL LEGACY HOLDINGS LIMITED | 03946312 | 14/10/2002 | 31/05/2005 | Dissolved |
| ABBEY NATIONAL LEGACY LIMITED | 03211363 | 12/07/2002 | 05/12/2008 | Dissolved |
| ABBEY NATIONAL TREASURY SERVICES (TRANSPORT HOLDINGS) LIMITED | 04188464 | 18/07/2002 | 31/05/2005 | Dissolved |
| CBRAIL (EURO) LIMITED | 04379196 | 09/07/2002 | 12/11/2004 | Dissolved |
| DERBY MANUFACTURING UTC | 08289534 | 13/06/2016 | 01/09/2018 | Dissolved |
| NSAR LIMITED | 07484465 | 18/09/2014 | 31/12/2017 | Silver |
| New Investment for Trains I Plc | 03407847 | 17/03/1998 | 23/10/2006 | Dissolved |
| PORTERBROOK HOLDINGS II LIMITED | 09251181 | 27/01/2015 | 29/09/2017 | Silver |
| PORTERBROOK INVESTMENTS I LIMITED | 06700588 | 27/01/2015 | 29/09/2017 | Gold |
| PORTERBROOK LEASING ASSET COMPANY LIMITED | 00635030 | 01/10/2008 | 29/09/2017 | Silver |
| PORTERBROOK LEASING COMPANY LIMITED | 02912662 | 15/07/1997 | 29/09/2017 | Silver |
| PORTERBROOK LEASING MID COMPANY LIMITED | 07007965 | 03/09/2009 | 29/09/2017 | Silver |
| PORTERBROOK MAINTENANCE LIMITED | 03657463 | 23/02/1999 | 29/09/2017 | Silver |
| PORTERBROOK MARCH LEASING (4) LIMITED | 02682768 | 04/04/2005 | 29/09/2017 | Silver |
| Porterbrook International Ltd | 04427968 | 28/05/2002 | 19/07/2005 | Dissolved |
| RAIL FORUM | 06832230 | 27/02/2009 | 31/12/2018 | Bronze |
| Rolling Stock Finance 1 Ltd | 03232892 | 22/05/1998 | 19/07/2005 | Dissolved |
| Rolling Stock Finance 2 Plc | 03213240 | 22/05/1998 | 19/07/2005 | Dissolved |
| SANTANDER SECRETARIAT SERVICES LIMITED | 03072288 | 14/08/1997 | 05/12/2008 | Not Trading |