| Company | Timeline | Status | |
| OLD Fargie Potato Breeding Co Limited Director • Potato Breeder | 18 Apr 2012←13 Years→Current | Active | |
| Robert J S Doig Limited Director • Housewife | 31 Oct 1991←34 Years→Current | Active | |
| Robert J S Doig Limited Director • Housewife | 1 Jan 1970←55 Years→12 Sep 2025 | Active | |
