| Company | Timeline | Status | |
| Winchester Anaesthetic Services Limited Director • Unreported | 15 Mar 2013←12 Years→Current | Active | |
| Dr. John Criswell Limited Director • Consultant Anaesthetist | 18 Mar 2009←13 Years→14 Mar 2023 | Dissolved | |
| Theanaestheticgroup Limited Director • Consultant Anaesthetist | 12 Dec 2008←10 Years→19 Mar 2019 | Active | |
