| Company | Timeline | Status | |
| Simpson Oils Limited Director • Unreported | 1 Sep 2021←4 Years→Current | Active | |
| Hugh Simpson (Contractors) Limited Director • Unreported | 1 Sep 2021←4 Years→Current | Active | |
| Oil And Storage Services Limited Director • Unreported | 14 Jan 2005←20 Years→Current | Active | |
