| Company | Timeline | Status | |
| Mark Williams Snooker Shop Limited Director • Professional Snooker Player | 10 Jul 2023←2 Years 5 Months→Current | Active | |
| Mark Williams Snooker Limited Director • Unreported | 14 Dec 2011←14 Years→Current | Active | |
| Downing Film Partnership LLP Non-designated LLP Member • Unreported | 2 Dec 2005←15 Years→5 Apr 2021 | Dissolved | |
