| Company | Timeline | Status | |
| De Marmion (Harewood Hill) Ltd Director • Director | 4 Nov 2025←1 Month→Current | Active | |
| De Marmion Investments Ltd Director • Director | 19 May 2025←6 Months→Current | Active | |
| Cornerstone Partnership Management Limited Director • Director | 1 Jul 2024←1 Year 5 Months→Current | Active | |
| Cornerstone Joint Ventures Holdings Limited Director • Director | 17 Feb 2024←1 Year 9 Months→Current | Active | |
| Keystone Alliance Ltd Director • Company Director | 6 Feb 2024←1 Year 10 Months→Current | Active | |
| Willows 21 Ltd Director • Company Director | 12 Jul 2023←2 Years 4 Months→21 Nov 2025 | Active | |
| Cornerstone Partnership Group Limited Director • Director | 1 May 2023←2 Years 7 Months→Current | Active | |
| Gillettstone Housing Limited Director • Director | 15 Apr 2023←2 Years 8 Months→Current | Active | |
| Connectstone Ltd Director • Company Director | 21 Jun 2022←10 Months→25 Apr 2023 | Dissolved | |
Community Housing Innovation Project Cic Director • Company Director | 15 Feb 2019←1 Year 8 Months→13 Oct 2020 | Dissolved | |
