| Company | Timeline | Status | |
| GRF Property Limited Director • Auctioneer/valuer | 31 Jul 2013←9 Years→12 Oct 2022 | Active | |
John Swan Trustee Limited Director • Farmer And Valuer | 22 Sep 2005←10 Years→14 Oct 2015 | Dissolved | |
| John Swan & Sons Limited Director • Farmer & Valuer | 5 Oct 1999←16 Years→14 Oct 2015 | Active | |
| GRF Farms Limited Director • Auctioneer/valuer | 19 Jun 1997←25 Years→12 Oct 2022 | Active | |
| Newcastle United Football Company Limited Director • Auctioneer & Agricultural Valuer | 31 Dec 1991←6 Months→6 Jul 1992 | Active | |
| GRF Land Limited Director • Auctioner/valuer | 15 Nov 1991←30 Years→12 Oct 2022 | Active | |
