| Company | Timeline | Status | |
| Cloburn Quarry Company Limited Director • Chartered Accountant | 6 Mar 2025←9 Months→Current | Active | |
| Granitmix Limited Director • Accountant | 28 Feb 2025←9 Months→Current | Active | |
| WM Hamilton Group Ltd Director • Accountant | 10 Jan 2025←11 Months→Current | Active | |
| Crossaig Estate LLP Designated LLP Member • Unreported | 5 Mar 2021←4 Years→Current | Active | |
Clydeside Regeneration (District Heating) (Operations) LLP Designated LLP Member • Unreported | 24 Oct 2018←1 Year 11 Months→22 Sep 2020 | Dissolved | |
| William Hamilton & Sons (Contractors) Limited Director • Director | 14 Mar 2006←19 Years→Current | Active | |
| WM Hamilton & Sons Limited Director • Chartered Accountant | 24 Jan 2006←19 Years→Current | Active | |
Datasafe (Records Storage And Management) Limited Director • Chartered Accountant | 1 Oct 2005←6 Years→6 Apr 2012 | Dissolved | |
| Clydeside Property Services Limited Director • Chartered Accountant | 1 Jul 2004←21 Years→Current | Active | |
| Clydeside Property Services Limited Secretary • Unreported | 13 May 2004←21 Years→Current | Active | |
