| Company | Timeline | Status | |
| Castle Howard Foundation Director • Company Director | 7 Nov 2023←2 Years 2 Months→Current | Active | |
| Castle Howard Developments Limited Director • Company Director | 6 Nov 2023←2 Years 2 Months→Current | Active | |
| Brideshead Golf & Country Club Limited Director • Company Director | 13 Jan 2012←14 Years→Current | Active | |
| Howard Trustees Limited Director • Company Director | 25 Apr 2001←24 Years→Current | Active | |
| Castle Howard Investments Limited Director • Company Director | 25 Apr 2001←24 Years→Current | Active | |
| Coneysthorpe Trustees Limited Director • Company Director | 25 Apr 2001←24 Years→Current | Active | |
| Castle Howard Arboretum Trust Director • Unreported | 5 Jan 1995←31 Years→Current | Active | |
| Castle Howard Estate Limited Director • Company Director | 1 Sep 1991←34 Years→Current | Active | |
