| Company | Timeline | Status | |
| Royston Scotland Limited Director • Director  | 12 May 2023←2 Years 5 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 • Unreported  | 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  | |
