| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Dorman Diesels Ltd | 01253490 | 12/03/2001 | Dissolved |
| EASTFIELD NO 11 LIMITED | 01757837 | 12/03/2001 | Insolvent |
| EASTFIELD NO 17 LIMITED | 01928204 | 01/07/2006 | Dissolved |
| EASTFIELD NO 23 LIMITED | 02668597 | 01/12/2004 | Dissolved |
| EASTFIELD NO 24 LIMITED | 02153095 | 01/10/2004 | Insolvent |
| EASTFIELD NO 25 LIMITED | 01923368 | 31/08/2006 | Insolvent |
| EASTFIELD NO 26 LIMITED | 02136657 | 27/11/2003 | Insolvent |
| EASTFIELD NO 5 LIMITED | 02010016 | 12/03/2001 | Insolvent |
| Eastfield No 19 Ltd | 03673857 | 20/12/2001 | Dissolved |
| Eastfield No 21 Ltd | 03767873 | 12/06/2003 | Dissolved |
| Eastfield No 22 Ltd | 01894686 | 23/04/2003 | Dissolved |
| Eastfield No. 15 | 03787820 | 20/06/2005 | Dissolved |
| Perkins Power Sales & Service Ltd | 03026612 | 12/03/2001 | Dissolved |
| Sharp Success Agricultural Ltd | 03827663 | 20/12/2001 | Dissolved |
| Systemjoin Ltd | 03360627 | 19/12/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CATERPILLAR (NI) LIMITED | NI006692 | 31/12/1999 | 18/01/2008 | Gold |
| CATERPILLAR (U.K.) LIMITED | 00484783 | 20/10/2005 | 31/01/2018 | Gold |
| CATERPILLAR COMMERCIAL NORTHERN EUROPE LIMITED | 03788156 | 20/06/2005 | 30/01/2018 | Silver |
| CATERPILLAR DC PENSION TRUST LIMITED | 03908921 | 30/11/2005 | 18/05/2007 | Not Trading |
| CATERPILLAR DC PENSION TRUST LIMITED | 03908921 | 07/06/2007 | 31/01/2018 | Not Trading |
| CATERPILLAR IMPACT PRODUCTS LIMITED | 03428248 | 14/09/2000 | 31/01/2018 | Dissolved |
| CATERPILLAR INVESTMENTS | 03812722 | 20/06/2005 | 30/01/2018 | Dissolved |
| CATERPILLAR LOGISTICS (UK) LIMITED | 05474105 | 22/09/2005 | 30/01/2018 | Bronze |
| CATERPILLAR MARINE POWER UK LIMITED | 00940053 | 07/11/2000 | 31/01/2018 | Gold |
| CATERPILLAR OVERSEAS LIMITED | 05190093 | 20/06/2005 | 30/01/2018 | Gold |
| CATERPILLAR PENSION TRUST LIMITED | 04007770 | 02/02/2006 | 07/06/2007 | Not Trading |
| CATERPILLAR SHREWSBURY LIMITED | 03851260 | 02/08/2004 | 31/01/2018 | Gold |
| CATERPILLAR SKINNINGROVE LIMITED | 02136670 | 01/02/2001 | 31/01/2018 | Gold |
| CATERPILLAR TUNNELLING EUROPE LIMITED | 02594307 | 01/04/2008 | 30/01/2018 | Not Trading |
| CATERPILLAR UK EMPLOYEE TRUST LIMITED | 04018035 | 31/08/2000 | 31/01/2018 | Not Trading |
| CATERPILLAR UK ENGINES COMPANY LIMITED | 05578070 | 01/07/2006 | 31/01/2018 | Gold |
| CATERPILLAR UK GROUP LIMITED | 05623145 | 01/07/2006 | 31/01/2018 | Not Trading |
| CATERPILLAR UK HOLDINGS LIMITED | 02728984 | 20/12/2001 | 30/01/2018 | Amber |
| Caterpillar International Leasing L.L.C. | FC018950 | 19/06/2001 | 18/11/2005 | Dissolved |
| F. PERKINS LIMITED | 00265987 | 12/03/2001 | 31/01/2018 | Gold |
| FG WILSON (ENGINEERING) LIMITED | 02388858 | 12/03/2001 | 31/01/2018 | Not Trading |
| NEOVIA LOGISTICS SERVICES (U.K.) LIMITED | 02136514 | 18/07/2002 | 31/07/2012 | Gold |
| PERKINS ENGINES COMPANY LIMITED | 02089227 | 12/03/2001 | 31/01/2018 | Silver |
| PERKINS ENGINES GROUP LIMITED | 00771951 | 12/03/2001 | 30/01/2018 | Not Trading |
| PERKINS GROUP LIMITED | 02388892 | 12/03/2001 | 31/01/2018 | Silver |
| PERKINS HOLDINGS LIMITED | 00504025 | 12/03/2001 | 31/01/2018 | Gold |
| PERKINS LIMITED | 00624567 | 12/03/2001 | 31/01/2018 | Not Trading |
| PERKINS SMALL ENGINES LIMITED | 02978384 | 28/02/1996 | 22/02/2018 | Not Trading |
| PROGRESS RAIL LEASING UK LIMITED | 03681421 | 13/06/2003 | 31/01/2018 | Silver |
| ST KYNEBURGHA BUILDING PRESERVATION TRUST | 04050654 | 10/08/2000 | 30/04/2017 | Gold |
| ST KYNEBURGHA BUILDING PRESERVATION TRUST | 04050654 | 10/08/2000 | 30/04/2017 | Gold |
| THOMAS DEACON EDUCATION TRUST | 05090788 | 09/11/2005 | 11/02/2011 | Silver |
| TURNER POWERTRAIN SYSTEMS LIMITED | 03100164 | 27/02/2004 | 31/01/2018 | Silver |