| Company | Timeline | Status | |
| Stamper Motorsport Limited Director • Accountant | 1 Aug 2018←7 Years→Current | Active | |
Stamper Rallysport Ltd Director • Accountant | 18 Nov 2014←3 Years→12 Dec 2017 | Dissolved | |
| Stamper & Co Accountants Ltd Director • Accountant | 12 Apr 2012←13 Years→Current | Active | |
| Stamper Properties Limited Director • Accountant | 8 May 2008←17 Years→Current | Active | |
| Stamper Motorsport Limited Secretary • Unreported | 19 Aug 2002←23 Years→Current | Active | |
