| Rol | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Persona con control significativo | THE HEATHERSLAW LIGHT RAILWAY CO LTD | 🇬🇧United Kingdom | Activa | 18/6/2024 – presente |
| Persona con control significativo | TETRAGEN HOLDINGS LIMITED | 🇬🇧United Kingdom | Activa | 19/6/2024 – presente |
| Persona con control significativo | TETRAGEN (KNAPTON) (UK) LTD | 🇬🇧United Kingdom | Activa | 22/6/2024 – 28/4/2017 |
| Persona con control significativo | GREEN ENGINE LIMITED | 🇬🇧United Kingdom | Activa | 24/6/2024 – presente |
| Persona con control significativo | DARRELL SMITH LIMITED | 🇬🇧United Kingdom | Activa | 24/6/2024 – presente |
| Cargo | CLEAN VORTEX LIMITED | 🇬🇧United Kingdom | Disuelta | 4/5/2026 – 26/8/2016 |
| Cargo | GREEN ENGINE LIMITED | 🇬🇧United Kingdom | Activa | 3/2/2026 – presente |
| Cargo | TETRAGEN (KNAPTON) (UK) LTD | 🇬🇧United Kingdom | Activa | 11/12/2025 – presente |
| Cargo | TETRAGEN (KNAPTON) LTD | 🇬🇧United Kingdom | Disuelta | 8/5/2026 – presente |
| Cargo | YORKSHIRE PELLET SUPPLIES LIMITED | — | Disuelta | 16/5/2026 – presente |
| Cargo | DARRELL SMITH LIMITED | 🇬🇧United Kingdom | Activa | 9/3/2026 – presente |
| Cargo | TETRAGEN HOLDINGS LIMITED | 🇬🇧United Kingdom | Activa | 10/2/2026 – presente |
| Cargo | ADVISERS4U LIMITED | — | Disuelta | 24/5/2026 – 30/1/2017 |
| Cargo | CLEANSIX LIMITED | — | Disuelta | 25/5/2026 – 27/6/2013 |
| Cargo | CLEANSIX LIMITED | — | Disuelta | 25/5/2026 – 17/10/2012 |
| Cargo | TETRAGEN LIMITED | 🇬🇧United Kingdom | Disuelta | 26/5/2026 – presente |
| Cargo | THE HEATHERSLAW LIGHT RAILWAY CO LTD | 🇬🇧United Kingdom | Activa | 26/5/2026 – presente |
26/5/2026
England → United Kingdom
20/5/2026
United Kingdom → England
26/8/2010
appointed