| Company | Timeline | Status | |
Echotherapy London Limited Director • Director | 2 Dec 2015←2 Years 5 Months→15 May 2018 | Dissolved | |
| Cassander Place Management Company Limited Director • Doctor | 12 Mar 2012←13 Years→11 Mar 2025 | Dissolved | |
| Dr. William Teh Limited Director • Unreported | 6 Aug 2004←21 Years→Current | Active | |
