| Company | Timeline | Status | |
| Lister Machinery Ltd Director • Company Director | 11 May 1992←33 Years→Current | Active | |
| Land Aids Limited Director • Company Director | 11 May 1992←33 Years→Current | Active | |
| Lister Wilder Group Limited Director • Company Director | 11 May 1992←33 Years→Current | Active | |
| Lister Wilder Limited Director • Company Director | 11 May 1991←34 Years→Current | Active | |
| Walter Wilder (Agricultural) Limited Director • Company Director | 11 May 1991←34 Years→Current | Active | |
