| Company | Timeline | Status | |
| Robert A Campbell Limited Secretary • Unreported | 24 Jan 2002←23 Years→Current | Active | |
| Rocket Exhibitions & Events Limited Secretary • Unreported | 29 Nov 1999←25 Years→Current | Active | |
| Integrated Environmental Solutions Limited Secretary • Solicitors | 28 Mar 1996←2 Years→24 Apr 1998 | Active | |
| Campbell Riddell Trustees Limited Secretary • Unreported | 24 Aug 1993←28 Years→1 Oct 2021 | Active | |
| Sibbald Properties Limited Secretary • Unreported | 17 Nov 1989←5 Years→31 Oct 1995 | Active | |
| Cruachan Trustees Limited Secretary • Unreported | 9 Mar 1989←32 Years→1 Oct 2021 | Active | |
| Lomond School Limited Secretary • Unreported | 19 Dec 1988←7 Years→5 Feb 1996 | Active | |
