| Company | Timeline | Status | |
| Stephen Hawking Limited Director • Director | 23 Sep 2015←2 Years 5 Months→14 Mar 2018 | Active | |
| Cosmic Horizons Limited Director • Professor | 21 Aug 2015←2 Years 6 Months→14 Mar 2018 | Dissolved | |
| Space Time Publications Limited Director • Professor Of Mathematics | 28 Feb 1992←26 Years→14 Mar 2018 | Active | |
