| Company | Timeline | Status | |
| Proton Therapy Worldwide Service Limited Director • Accountant | 8 Jun 2022←3 Years→Current | Active | |
| Proton Therapy Worldwide Service Limited Director • Accountant | 8 Jun 2022←3 Years→16 Jun 2025 | Active | |
| DCK Capital Ltd Director • Accountant | 5 Jun 2018←1 Year 4 Months→10 Oct 2019 | Dissolved | |
| DMJ Capital Partners Limited Director • Accountant | 25 May 2018←1 Year 4 Months→10 Oct 2019 | Dissolved | |
Brevissimo Ltd Director • Accountant | 1 Mar 2018←10 Months→8 Jan 2019 | Dissolved | |
| Nosch Limited Director • Unreported | 23 Sep 2013←12 Years→Current | Dissolved | |
| Koller UK Immobilien Limited Director • Unreported | 22 Jul 2010←15 Years→Current | Active | |
| Witbi Limited Director • Unreported | 3 Mar 2010←15 Years→Current | Active | |
| Koller UK Limited Director • Accountant | 28 Sep 2009←15 Years→26 Aug 2025 | Dissolved | |
