| Company | Timeline | Status | |
| 19TH Century Art Limited Director • Art Dealer | 14 Feb 1992←33 Years→Current | Active | |
| Macconnal-Mason & Son Limited Director • Art Dealer | 14 Feb 1992←33 Years→Current | Active | |
| L.M.Investment Co.(St.James's)Limited Director • Art Dealer | 22 Jun 1991←34 Years→Current | Active | |
| Continental Paintings Limited Director • Art Dealer | 12 Dec 1990←35 Years→Current | Active | |
