| Company | Timeline | Status | |
| Design 64 Limited Secretary • Unreported  | 30 Aug 2007←18 Years→Current  | Liquidation  | |
| Design 64 Limited Director • Director  | 30 Aug 2007←18 Years→Current  | Liquidation  | |
| Trade Sales Limited Director • Director  | 5 May 2006←14 Years→17 Nov 2020  | Dissolved  | |
| Trade Sales Limited Secretary • Unreported  | 5 May 2006←14 Years→17 Nov 2020  | Dissolved  | |
| Federation Of Engine Re-Manufacturers Limited Director • Director  | 26 Nov 2005←16 Years→7 Nov 2022  | Active  | |
| D.S. Johnston Properties Limited Director • Engineer  | 25 Jul 2001←24 Years→Current  | Active  | |
| D.S. Johnston Properties Limited Secretary • Engineer  | 25 Jul 2001←24 Years→Current  | Active  | |
| Altis Industries Limited Director • Engineer  | 30 Apr 1992←23 Years→31 Dec 2015  | In Administration  | |
| Altis Industries Limited Secretary • Unreported  | 30 Apr 1992←23 Years→31 Dec 2015  | In Administration  | |
D.S.Johnston & Company Limited Director • Engineer  | 28 Feb 1992←26 Years→15 Dec 2018  | Dissolved  | |
