| Company | Timeline | Status | |
| Clark Commercials (Aberdeen) Limited Director • Company Director | 28 Jun 2016←10 Months→21 May 2017 | Active | |
| Abbotswell Developments Limited Director • Company Director | 5 Nov 2007←9 Years→21 May 2017 | Active | |
| Abbotswell Developments Limited Secretary • Company Director | 5 Nov 2007←8 Years→28 Jun 2016 | Active | |
| Pentland Motor Company Limited Director • Co. Director | 7 Nov 1997←19 Years→21 May 2017 | Active | |
| Pentland Motor Company Limited Secretary • Co. Director | 7 Nov 1997←18 Years→28 Jun 2016 | Active | |
| John Clark (Properties) Limited Director • Unreported | 1 Feb 1997←20 Years→21 May 2017 | Active | |
| John Clark (Properties) Limited Secretary • Unreported | 19 Dec 1996←19 Years→28 Jun 2016 | Active | |
| John Clark (Tayside) Limited Director • Director | 16 May 1991←26 Years→21 May 2017 | Active | |
| White Flag Assistance Limited Director • Director | 16 May 1991←26 Years→21 May 2017 | Active | |
| Electric Car Store Limited Secretary • Director | 13 Feb 1989←27 Years→28 Jun 2016 | Active | |
