| Company | Timeline | Status | |
Clean Vortex Limited Director • Director  | 18 Jun 2015←1 Year 2 Months→26 Aug 2016  | Dissolved  | |
| Green Engine Limited Director • Company Director  | 15 Jan 2015←10 Years→Current  | Active  | |
| Tetragen (Knapton) (UK) Ltd Director • Consultant  | 5 Dec 2014←10 Years→Current  | Active  | |
Tetragen (Knapton) Ltd Director • Consultant  | 3 Oct 2014←9 Months→30 Jun 2015  | Dissolved  | |
Yorkshire Pellet Supplies Limited Director • Company Director  | 7 Feb 2013←1 Year 6 Months→19 Aug 2014  | Dissolved  | |
| Darrell Smith Limited Director • Company Director  | 2 Mar 2012←13 Years→Current  | Active  | |
| Tetragen Holdings Limited Director • Company Director  | 31 Jan 2012←13 Years→Current  | Active  | |
Advisers4u Limited Director • Commercial Lawyer  | 1 Aug 2011←5 Years→30 Jan 2017  | Dissolved  | |
Cleansix Limited Director • Company Director  | 14 Oct 2010←2 Years→17 Oct 2012  | Dissolved  | |
| Tetragen Limited Director • Commercial Consultant  | 26 Aug 2010←12 Years→23 Aug 2022  | Dissolved  | |
