| Company | Timeline | Status | |
| Slatedirect Limited Director • Accountant | 16 Mar 2004←9 Years→18 Dec 2013 | Active | |
| Greaves Welsh Slate Company Limited Secretary • Unreported | 24 Dec 1998←14 Years→23 May 2013 | Active | |
| Greaves Ellis Davies & Company Limited Director • Accountant | 23 Dec 1998←14 Years→23 May 2013 | Dissolved | |
| J.W.Greaves & Sons,Limited Director • Accountant | 23 Dec 1998←15 Years→16 Jun 2014 | Active | |
| Slate Heritage International Director • Accountant | 18 Dec 1996←16 Years→23 May 2013 | Active | |
| Quarry Tours Limited Director • Accountant | 18 Dec 1996←16 Years→23 May 2013 | Active | |
| Greaves Welsh Slate Company Limited Director • Accountant | 21 Feb 1992←21 Years→23 May 2013 | Active | |
| Greaves Ellis Davies & Company Limited Secretary • Unreported | 5 Jul 1991←21 Years→23 May 2013 | Dissolved | |
