| Company | Timeline | Status | |
| Edinburgh Science Foundation Ltd Director • Director | 24 Jul 2012←12 Years→21 Nov 2024 | Active | |
| Edinburgh Science Worldwide Ltd Director • Director | 28 Jan 2011←13 Years→21 Nov 2024 | Active | |
Elonics Limited Director • Director | 21 Aug 2008←6 Years→2 Sep 2014 | Dissolved | |
| Edinburgh Science Ltd Director • Director | 6 Jul 2007←17 Years→21 Nov 2024 | Active | |
| OLD College Capital Holdings Limited Director • Director | 1 Aug 1999←10 Years→3 Aug 2009 | Active | |
| Ratho Quarry Company Limited Director • Company Director | 1 Mar 1999←5 Years→4 Mar 2004 | In Receivership | |
Wolfson Products Limited Director • Director | 26 Oct 1991←15 Years→28 Feb 2007 | Dissolved | |
| Cirrus Logic International (UK) Ltd Director • Director | 11 Aug 1989←23 Years→11 Sep 2012 | Active | |
