| Company | Timeline | Status | |
| Parker Devices Limited Director • Company Director | 26 Jul 2013←7 Years→25 May 2021 | Dissolved | |
| Melys AFS Limited Director • Physicist | 11 Apr 2008←16 Years→17 Sep 2024 | Dissolved | |
| Melys AFS Limited Secretary • Unreported | 11 Apr 2008←16 Years→17 Sep 2024 | Dissolved | |
| Melys Diagnostics Limited Director • Unreported | 28 May 2004←21 Years→Current | Active | |
| Melys Diagnostics Limited Secretary • Physicist | 28 May 2004←1 Day→29 May 2004 | Active | |
| Whitland Research Limited Director • Physicist | 10 Feb 1999←4 Years→5 Dec 2003 | Dissolved | |
Lewis Parker Investments Limited Director • Co Director | 8 Aug 1991←2 Years 1 Month→30 Sep 1993 | Dissolved | |
