| Company | Timeline | Status | |
| The Weiss Gallery Limited Director • Managing Director | 3 Mar 2023←2 Years 7 Months→Current | Active | |
| River Gardens Amenity Limited Director • Art Dealer | 31 May 1995←5 Years→23 May 2001 | Active | |
| Mark Weiss Limited Director • Art Dealer | 5 Mar 1991←34 Years→Current | Active | |
| Mark Weiss Limited Secretary • Unreported | 5 Mar 1991←12 Years→23 May 2003 | Active | |
