| Company | Timeline | Status | |
| JMP International Limited Director • Architect | 17 Apr 2009←12 Years→9 Nov 2021 | Dissolved | |
| Caledonia Limited Director • Architect | 30 Jun 2005←17 Years→1 Feb 2023 | Active | |
| Caledonia Limited Secretary • Architect | 30 Jun 2005←17 Years→1 Feb 2023 | Active | |
| John McAslan & Partners Limited Director • Architect | 30 Jun 2005←17 Years→1 Feb 2023 | Active | |
| JMP Studio Limited Secretary • Unreported | 13 Oct 2000←21 Years→9 Nov 2021 | Dissolved | |
| Troughton McAslan Limited Secretary • Unreported | 13 Oct 2000←21 Years→9 Nov 2021 | Dissolved | |
| John McAslan & Partners Limited Secretary • Unreported | 13 Oct 2000←22 Years→1 Feb 2023 | Active | |
| Weldon Walshe Limited Secretary • Unreported | 14 Sep 1998←2 Years 3 Months→2 Jan 2001 | Dissolved | |
