| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ASSOCIATED LEAD MANUFACTURERS LIMITED | 01428597 | 23/02/2006 | Dissolved |
| B T I M Ltd | 05215603 | 26/08/2004 | Dissolved |
| CALDER GROUP (TRUSTEES) LIMITED | 04427519 | 11/01/2005 | Gold |
| CALDER METAL PROCESSORS LIMITED | 01983698 | 23/02/2006 | Dissolved |
| CIM INVESTMENTS LIMITED | 00335867 | 23/02/2006 | Dissolved |
| ELSIA LIMITED | 03140948 | 06/10/2005 | Dissolved |
| FAB CAST ENGINEERING LIMITED | 01581226 | 23/02/2006 | Dissolved |
| FABCAST HOLDINGS LIMITED | 02952749 | 23/02/2006 | Dissolved |
| LEAD TECHNOLOGIES LIMITED | 04214033 | 23/02/2006 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AQUILA NUCLEAR ENGINEERING LIMITED | 07442871 | 02/06/2011 | 01/11/2016 | Bronze |
| CALDER FINCO UK LTD | 05721362 | 14/04/2008 | 01/09/2020 | Gold |
| CALDER GROUP HOLDINGS LIMITED | 09457820 | 25/02/2015 | 01/09/2020 | Silver |
| CALDER GROUP LIMITED | 03491249 | 23/02/2006 | 31/12/2020 | Amber |
| CALDER HOLDINGS LIMITED | 03491252 | 23/02/2006 | 01/09/2020 | One Red Flag |
| CALDER INDUSTRIAL MATERIALS LIMITED | 00028073 | 22/12/2004 | 01/09/2020 | Bronze |
| CALDER INTERNATIONAL HOLDINGS LIMITED | 03491092 | 23/02/2006 | 01/09/2020 | Gold |
| FSLP LIMITED | 06470282 | 11/01/2008 | 28/03/2008 | Insolvent |
| HELANDER PRECISION ENGINEERING LIMITED | 02739330 | 17/08/2007 | 01/11/2016 | One Red Flag |
| LEAD SHEET TRAINING ACADEMY LIMITED | 00216255 | 09/03/2005 | 16/09/2009 | Bronze |
| LEEDS BRONZE ENGINEERING LIMITED | 03491043 | 23/02/2006 | 31/03/2020 | Amber |
| MIDLAND AEROSPACE LIMITED | 04326476 | 19/06/2008 | 01/11/2016 | Bronze |
| STAMPTREE LIMITED | 05636469 | 23/04/2007 | 01/09/2020 | Silver |