| Company | Timeline | Status | |
| Cambridge Valid Ltd Director • Teacher | 9 Dec 2023←1 Year 10 Months→Current | Active | |
| Explorandum Ltd Director • Teacher | 14 Jul 2023←2 Years 3 Months→Current | Active | |
| Academico Ltd Director • Director | 21 Oct 2020←5 Years→Current | Active | |
| Repindicator Limited Director • Director | 12 Apr 2012←12 Years→18 Jun 2024 | Dissolved | |
| Repindex Limited Director • Consultant | 10 May 2000←25 Years→Current | Active | |
| Mark Perkins Language International Limited Director • Company Director | 10 Apr 1997←28 Years→Current | Active | |
