| Company | Timeline | Status | |
| Royston Scotland Limited Director • Unreported | 12 May 2023←2 Years 8 Months→Current | Active | |
| Shipaid Diesel Services Limited Director • Accountant | 2 Jun 2016←9 Years→Current | Active | |
| Royston Power Generation Limited Director • Accountant | 20 Apr 2011←14 Years→Current | Active | |
| Royston Engineering Group Limited Director • Accountant | 20 Apr 2011←14 Years→Current | Active | |
| Royston Marine Limited Director • Accountant | 20 Apr 2011←14 Years→Current | Active | |
| Royston Marine Engineering Limited Director • Unreported | 20 Apr 2011←14 Years→Current | Active | |
| Royston Limited Director • Accountant | 20 Apr 2011←14 Years→Current | Active | |
| Eyeworks Industries Limited Secretary • Unreported | 18 Sep 2007←6 Years→25 Feb 2014 | Active | |
