| Company | Timeline | Status | |
| William Duncan + Co Ltd Director • Unreported | 10 Nov 2015←10 Years→Current | Active | |
| XTRA Accounting Ltd Director • Unreported | 15 Jan 2013←12 Years→Current | Active | |
| S J Bargh Consultancy Ltd Director • Chartered Accountant | 11 May 2011←12 Years→9 Apr 2024 | Dissolved | |
| Heartstart Ayrshire And Arran Director • Unreported | 31 Mar 2008←17 Years→Current | Active | |
William Duncan LLP Designated LLP Member • Unreported | 31 May 2007←7 Years→28 Nov 2014 | Dissolved | |
Tax Investigation Protection Service Limited Director • Chartered Accountant | 1 Sep 2006←8 Years→12 Sep 2014 | Dissolved | |
