| Company | Timeline | Status | |
| OLD Fargie Potato Breeding Co Limited Director • Potato Merchant | 3 Sep 2013←12 Years→Current | Active | |
| Potato Council Limited Director • Potato Grower | 19 Sep 2008←1 Year 2 Months→10 Dec 2009 | Dissolved | |
| Caledonia Potato Holdings Ltd Director • Company Director | 24 Mar 2006←19 Years→Current | Active | |
| Global Crops Ltd Director • Company Director | 1 Jun 2005←15 Years→30 Jun 2020 | Active | |
| Robert J S Doig Limited Director • Potato Merchant | 3 Oct 1994←31 Years→Current | Active | |
| Robert J S Doig Limited Secretary • Unreported | 31 Oct 1991←34 Years→Current | Active | |
