| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Person with significant control | D SIMPSON WINDOWS & DOORS LTD | 🇬🇧United Kingdom | Active | 13/05/2024 – present |
| Person with significant control | SUBCO FIRE SYSTEMS LIMITED | 🇬🇧United Kingdom | Active | 15/02/2024 – 30/04/2024 |
| Person with significant control | DAVID SIMPSON LANDSCAPING LIMITED | 🇬🇧United Kingdom | Active | 01/06/2024 – present |
| Person with significant control | — | — | Active | 26/06/2024 – present |
| Person with significant control | DR DATA & COMMUNICATIONS LIMITED | — | Active | 26/06/2024 – present |
| Person with significant control | — | — | Active | 21/06/2024 – present |
07/05/2026
Northern Ireland → United Kingdom
08/12/2025
United Kingdom → Northern Ireland
06/04/2016
appointed