| Company | Timeline | Status | |
| Mindtrace Limited Director • Director | 29 May 2018←4 Years→23 Dec 2022 | Active | |
| Withington Girls' School Director • None | 31 Aug 2015←1 Year 9 Months→19 Jun 2017 | Active | |
| Itext Limited Director • Academic | 26 Sep 2007←2 Years 5 Months→25 Feb 2010 | Active | |
Silistix Limited Director • University Professor | 15 Apr 2004←2 Years 8 Months→31 Dec 2006 | Dissolved | |
| Transitive Limited Director • University Professor | 6 Jun 2001←2 Years→25 Jun 2003 | Dissolved | |
| Cogniscience Limited Director • Unreported | 16 Jun 2000←25 Years→Current | Active | |
