| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| DENHOLM ENERGY SERVICES LIMITED | 09186034 | 21/08/2014 | Silver |
| DENHOLM ENGINEERING LIMITED | SC411270 | 17/07/2015 | Not Trading |
| DENHOLM ENVIRONMENTAL LIMITED | SC298532 | 04/09/2012 | Amber |
| DENHOLM MACNAMEE LIMITED | SC709210 | 10/09/2021 | Not Trading |
| HAZCO ENVIRONMENTAL LIMITED | SC709211 | 10/09/2021 | Not Trading |
| INDUSTRIAL AIR POWER LIMITED | 07884093 | 03/02/2016 | Not Trading |
| KSW ENGINEERING LIMITED | SC077744 | 25/06/2015 | Silver |
| PETRASCO SERVICES LIMITED | SC280844 | 06/12/2011 | Silver |
| RELAY ENGINEERING LIMITED | 02431701 | 17/02/2009 | Amber |
| RELAY INTERNATIONAL GROUP LIMITED | 14764556 | 28/03/2023 | Silver |
| TURNER & HICKMAN LIMITED | SC318140 | 05/11/2013 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|