| Company | Timeline | Status | |
| Ostro Re Limited Director • Director | 26 Oct 2017←8 Years→Current | Active | |
| Ostroumoff Limited Director • Director | 13 Nov 2008←16 Years→27 Jun 2025 | Dissolved | |
| Celtbrook Limited Director • Surveyor | 2 Apr 2005←20 Years→Current | Active | |
