| Company | Timeline | Status | |
| Tennants Consolidated Limited Director • Co Director | 8 Sep 2005←20 Years→Current | Active | |
| Dundee Chemicals Limited Director • Company Director | 24 Feb 2005←20 Years→Current | Active | |
| Hugh Gell & Company Limited Director • Director | 30 Jun 2004←21 Years→Current | Active | |
| Anderson Gibb & Wilson Limited Director • Company Director | 7 Dec 2001←24 Years→Current | Active | |
| John C. Walker Limited Director • Company Director | 7 Dec 2001←23 Years→28 May 2025 | Active | |
| Tennants Distribution Limited Director • Company Director | 11 Sep 1996←29 Years→Current | Active | |
| Charles Tennant & Company, Limited Director • Company Director | 26 Apr 1989←36 Years→Current | Active | |
