| Company | Timeline | Status | |
| Holder Mathias (Holdings) Limited Director • Architect | 28 Mar 2025←7 Months→Current | Active | |
| Holder Mathias LLP Designated LLP Member • Unreported | 17 Jul 2009←16 Years→Current | Active | |
| Holder Mathias Architects Limited Director • Architect | 1 Jan 2008←17 Years→Current | Active | |
