| Company | Timeline | Status | |
| Illingworth Research Limited Director • Managing Director | 23 Dec 2016←3 Years→17 Dec 2020 | Dissolved | |
| Peak Escapes Limited Director • Director | 18 Nov 2015←7 Years→21 Jun 2023 | Dissolved | |
| Clinical Development & Support Services Limited Director • Medical Researcher | 31 Dec 2010←10 Years→13 Jul 2021 | Dissolved | |
| Illingworth Research Group Limited Director • Medical Consultant | 26 Oct 1998←22 Years→17 Dec 2020 | Active | |
