| Company | Timeline | Status | |
| St. John's Rise Management Company Limited Director • Chartered Surveyor | 25 Feb 2025←9 Months→Current | Active | |
| Chobham Golf Club Limited Director • Chartered Surveyor | 8 Dec 2020←3 Years→2 Dec 2024 | Active | |
| Ian Oswin Consultancy Limited Director • Chartered Surveyor | 28 Feb 2019←4 Years→21 Nov 2023 | Dissolved | |
| Ian Oswin Limited Director • Chartered Surveyor | 25 Sep 2007←18 Years→Current | Active | |
| Portmore Holdings Limited Director • Chartered Surveyor | 23 Dec 2003←19 Years→21 Nov 2023 | Dissolved | |
Portmore House Estates Limited Director • Chartered Surveyor | 23 Dec 2003←10 Years→9 Jul 2014 | Dissolved | |
| Gablecourt Limited Director • Chartered Surveyor | 31 May 1991←8 Years→23 May 2000 | Active | |
