| Company | Timeline | Status | |
| Denholm Industrial Services (Holdings) Limited Director • Operations Director | 2 Oct 2006←10 Years→30 Jan 2017 | Dissolved | |
| Relay Engineering Limited Director • Operations Director | 21 Dec 2005←3 Years→17 Feb 2009 | Active | |
| Ably Access Ltd Director • Operations Director | 25 Jun 2004←4 Years→6 Aug 2008 | Dissolved | |
Denholm Oilfield Services (UK) Limited Director • Operations Director | 4 Mar 2002←3 Years→14 Jul 2005 | Dissolved | |
| Denholm Oilfield Services (Kazakhstan) Limited Director • Operations Director | 18 Jun 1992←14 Years→2 Oct 2006 | Active | |
| Denholm Contracting Limited Director • Operations Director | 2 Oct 1989←25 Years→7 Jul 2015 | Dissolved | |
