| Company | Timeline | Status | |
| Smith Brothers Group Holdings Limited Director • Unreported | 24 Oct 2022←3 Years→Current | Active | |
| Plymport Limited Director • Unreported | 18 May 2021←4 Years→Current | Active | |
| Scientific Services (Paisley) Limited Director • Unreported | 17 Aug 2004←21 Years→Current | Active | |
| Scientific Services (Paisley) Limited Secretary • Director | 17 Aug 2004←2 Months→10 Nov 2004 | Active | |
| Smith Brothers Marine Limited Director • Unreported | 22 Aug 1996←29 Years→Current | Active | |
