| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ACAL ENERGY LTD | 05209861 | 21/07/2011 | Dissolved |
| Perkins Americas Ltd | 03378753 | 15/10/1997 | Dissolved |
| Perkins Asia Pacific Ltd | 03155960 | 29/04/1996 | Dissolved |
| Perkins Compact Engines Ltd | 02388839 | 02/10/1995 | Dissolved |
| Perkins Engines (Peterborough) Ltd | 02388848 | 02/10/1995 | Dissolved |
| Perkins Executive Pension Trust Ltd | 00509136 | 09/05/1995 | Dissolved |
| Perkins International Ltd | 02388859 | 02/10/1995 | Dissolved |
| Perkins Parts Ltd | 03026611 | 02/10/1995 | Dissolved |
| Perkins Technology Ltd | 02388841 | 02/10/1995 | Dissolved |
| SMMT INDUSTRY FORUM LIMITED | 08229698 | 02/10/2012 | One Red Flag |
| SOCIETY OF MOTOR MANUFACTURERS AND TRADERS LIMITED(THE) | 00074359 | 02/07/2024 | Gold |
| VTL GROUP (HOLDINGS) LIMITED | 04250061 | 24/09/2013 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CATERPILLAR MARINE POWER UK LIMITED | 00940053 | 03/04/2000 | 30/01/2004 | Gold |
| Caribou Corporation Ltd | 03378746 | 26/08/1997 | 09/03/1998 | Dissolved |
| Dorman Diesels Ltd | 01253490 | 02/10/1995 | 30/01/2004 | Dissolved |
| E.E.F. TRUSTEES LIMITED | 00727080 | 24/04/2002 | 04/11/2009 | Dissolved |
| EASTFIELD NO 11 LIMITED | 01757837 | 02/10/1995 | 19/12/2002 | Insolvent |
| EASTFIELD NO 5 LIMITED | 02010016 | 02/10/1995 | 19/12/2002 | Insolvent |
| Eastfield No. 15 | 03787820 | 30/06/2000 | 30/01/2004 | Dissolved |
| F. PERKINS LIMITED | 00265987 | 02/10/1995 | 30/01/2004 | Gold |
| FG WILSON (ENGINEERING) LIMITED | 02388858 | 02/10/1995 | 19/12/2002 | Not Trading |
| Lucasvarity Holdings Ltd | 01061033 | 25/11/1996 | 11/03/1998 | Dissolved |
| PERKINS ENGINES COMPANY LIMITED | 02089227 | 11/06/1998 | 26/03/2009 | Amber |
| PERKINS ENGINES GROUP LIMITED | 00771951 | 02/10/1995 | 30/01/2004 | Not Trading |
| PERKINS GROUP LIMITED | 02388892 | 02/10/1995 | 30/01/2004 | Silver |
| PERKINS HOLDINGS LIMITED | 00504025 | 30/09/1996 | 30/01/2004 | Gold |
| PERKINS LIMITED | 00624567 | 02/10/1995 | 30/01/2004 | Not Trading |
| PERKINS SMALL ENGINES LIMITED | 02978384 | 02/10/1995 | 18/02/2004 | Not Trading |
| Perkins Pension Trust Ltd | 03036950 | 09/05/1995 | 23/03/1999 | Dissolved |
| Perkins Power Sales & Service Ltd | 03026612 | 02/10/1995 | 19/12/2002 | Dissolved |
| SERTEC CORPORATION LIMITED | 09989098 | 17/02/2016 | 02/06/2020 | One Red Flag |
| SOCIETY OF MOTOR MANUFACTURERS AND TRADERS LIMITED(THE) | 00074359 | 07/06/1995 | 22/06/2005 | Gold |
| TT ELECTRONICS PLC | 00087249 | 01/09/2010 | 01/09/2019 | Silver |