| Company | Timeline | Status | |
| Computerbasedmath.Org Ltd Director • Software | 26 Jun 2012←13 Years→Current | Active | |
| Wolfram Properties Limited Director • Director | 28 May 2008←17 Years→Current | Active | |
| Wolfram Research Europe Limited Director • Software | 31 Jan 1996←29 Years→Current | Active | |
| H.Wolfram & Co.Limited Director • Director | 25 Jan 1993←21 Years→2 Dec 2014 | Dissolved | |
