| Company | Timeline | Status | |
| John Clarkson Plumbers Limited Director • Director | 23 Mar 2009←14 Years→24 Feb 2024 | Dissolved | |
| John Clarkson Plumbers Limited Director • Director | 22 May 2007←1 Day→23 May 2007 | Dissolved | |
| JPC Developments (Dundee) Limited Director • Director | 2 Feb 2007←17 Years→2 Jul 2024 | Dissolved | |
| John Clarkson Plumbing & Service Engineers Limited Director • Director | 16 May 2003←22 Years→Current | Liquidation | |
