| Função | Empresa | País | Estado | Período |
|---|---|---|---|---|
| Dirigente | PREMIUM CAR BUYING SERVICE LIMITED | 🇬🇧United Kingdom | Ativa | 08/04/2026 – presente |
| Dirigente | PAARCHER ESTATE AGENT LTD | 🇬🇧United Kingdom | Dissolvida | 20/03/2026 – presente |
| Dirigente | M W AUTO CENTRE LIMITED | 🇬🇧United Kingdom | Ativa | 23/03/2026 – presente |
| Dirigente | AGILE AUDIT ACADEMY LTD | 🇬🇧United Kingdom | Dissolvida | 24/03/2026 – presente |
| Dirigente | AGILE OUTSIDE IT LTD | 🇬🇧United Kingdom | Ativa | 03/02/2026 – presente |
| Dirigente | WILLIAMS GROUP KENT LIMITED | 🇬🇧United Kingdom | Dissolvida | 29/03/2026 – presente |
| Dirigente | WE BUILDING SERVICES LTD | 🇬🇧United Kingdom | Ativa | 18/12/2025 – presente |
| Dirigente | RACING SYNDICATE MANAGEMENT LTD | 🇬🇧United Kingdom | Dissolvida | 31/03/2026 – 06/06/2023 |
| Dirigente | MIDWAY HOLDINGS (STAFFS) LTD | 🇬🇧United Kingdom | Ativa | 02/02/2026 – presente |
| Dirigente | MARK WILLIAMS INTERNATIONAL LTD | 🇬🇧United Kingdom | Ativa | 03/04/2026 – 14/10/2021 |
| Dirigente | THE BIG HEART OF MERTHYR TYDFIL | 🇬🇧United Kingdom | Ativa | 17/05/2026 – 22/09/2023 |
| Dirigente | VAN CIRCLE LTD | 🇬🇧United Kingdom | Ativa | 09/04/2026 – presente |
| Dirigente | TYAS RHYS LTD | 🇬🇧United Kingdom | Dissolvida | 01/03/2026 – presente |
| Dirigente | MW ENGINEERING CONSULTANCY LIMITED | 🇬🇧United Kingdom | Dissolvida | 01/05/2026 – presente |
| Dirigente | FLEET VEHICLE DISPOSALS LIMITED | 🇬🇧United Kingdom | Ativa | 15/04/2026 – presente |
| Dirigente | BRYN MENAI AUTOMOTIVE LTD | 🇬🇧United Kingdom | Ativa | 21/04/2026 – presente |
| Dirigente | MARK WILLIAMS CONSULTANCY SERVICES LTD | 🇬🇧United Kingdom | Ativa | 08/01/2026 – presente |
| Dirigente | DMJLWILLIAMS LIMITED | 🇬🇧United Kingdom | Dissolvida | 25/04/2026 – presente |
| Dirigente | TRADE ASSOCIATIONS SERVICES LIMITED | 🇬🇧United Kingdom | Ativa | 26/02/2026 – 28/02/2025 |
| Dirigente | TCM WILLIAMS LIMITED | 🇬🇧United Kingdom | Ativa | 23/12/2025 – presente |
| Dirigente | WGM MANAGEMENT SERVICES LIMITED | 🇬🇧United Kingdom | Dissolvida | 13/05/2026 – presente |
| Dirigente | MARK WILLIAMS (UK) LIMITED | 🇬🇧United Kingdom | Dissolvida | 18/05/2026 – presente |
| Dirigente | A & S STORAGE SOLUTIONS LIMITED | — | Dissolvida | 21/05/2026 – presente |
| Dirigente | OCEAN CAR CENTRE (TEESSIDE) LTD | 🇬🇧United Kingdom | Dissolvida | 22/05/2026 – presente |
| Dirigente | PICARDIE CARPING LIMITED | 🇬🇧United Kingdom | Dissolvida | 28/05/2026 – presente |
| Dirigente | TRIPLE M MOTORS LTD | — | Dissolvida | 28/05/2026 – 21/08/2012 |
| Dirigente | TAPDALE LIMITED | — | Dissolvida | 02/06/2026 – presente |
| Dirigente | OFF MARKET REALTY UK LTD | — | Ativa | 04/02/2026 – presente |
| Dirigente | MARK WILLIAMS EXECUTIVE SEARCH (UK) LIMITED | — | Dissolvida | 06/06/2026 – presente |
| Dirigente | BROOKSON (5686I) LIMITED | 🇬🇧United Kingdom | Dissolvida | 09/06/2026 – presente |
| Dirigente | MIDWAY SURVEYING LIMITED | — | Ativa | 06/01/2026 – presente |
| Dirigente | M W VEHICLE CONTRACTS LTD | 🇬🇧United Kingdom | Ativa | 23/03/2026 – presente |
| Dirigente | WILLIAMS BROTHERS LTD | 🇬🇧United Kingdom | Dissolvida | 07/01/2026 – presente |
02/06/2026
Wales → United Kingdom
28/05/2026
United Kingdom → Wales
31/08/2012
appointed