| Company | Timeline | Status | |
| Stephona Properties Limited Director • Director | 5 Mar 2012←13 Years→8 Apr 2025 | Dissolved | |
| William Robertson & Sons Limited Director • Director/co Secretary | 22 Jan 2004←21 Years→Current | Active | |
| William Robertson & Sons Limited Secretary • Manager | 22 Jan 2004←21 Years→Current | Active | |
| Clipper Tech Limited Director • Secretary | 9 Apr 1991←11 Years→27 Nov 2002 | Active | |
| Clipper Tech Limited Secretary • Unreported | 2 Jul 1990←12 Years→27 Nov 2002 | Active | |
