| Company | Timeline | Status | |
| 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 | |
| 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 | |
| Altis Industries Limited Director • Engineer | 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 | |
Premier Propshaft Co. Ltd Director • Engineer | 31 Dec 1991←25 Years→12 Sep 2017 | Dissolved | |
Dawndrive Limited Director • Engineer | 13 Aug 1991←26 Years→22 Aug 2017 | Dissolved | |
| XRN Engineering Limited Director • Engineer | 28 Feb 1991←34 Years→Current | Active | |
| D.S. Johnston (Holdings) Limited Director • Engineer | 28 Feb 1991←34 Years→Current | Active | |
