| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| KNORR-BREMSE INVESTMENT (UK) LIMITED | 03965122 | 08/12/2016 | Gold |
| KNORR-BREMSE RAIL SYSTEMS (BURTON) LIMITED | 02887937 | 29/09/2010 | Dissolved |
| KNORR-BREMSE RAIL SYSTEMS (MACHINING) LIMITED | 07263635 | 24/05/2010 | Dissolved |
| KNORR-BREMSE RAIL SYSTEMS (UK) LIMITED | 03974921 | 01/01/2009 | One Red Flag |
| KNORR-BREMSE SA HOLDING COMPANY (UK) LTD | 06996809 | 12/08/2010 | Gold |
| SIGMA COACHAIR HOLDINGS (UK) LIMITED | 01827488 | 29/09/2010 | Dissolved |
| TECHTRAIN ASSOCIATES LIMITED | 03766401 | 18/05/2009 | Dissolved |
| WESTINGHOUSE BRAKES LIMITED | 01641419 | 01/01/2009 | Dissolved |
| WESTINGHOUSE PLATFORM SCREEN DOORS LIMITED | 03508799 | 01/01/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| C.I.S. Wilson Ltd | 03546634 | 20/04/1998 | 14/09/1999 | Dissolved |
| GEMINI RAIL SERVICES UK LTD | 08656105 | 19/08/2013 | 31/10/2018 | One Red Flag |