| Role | Company | Country | Status | Date Range |
|---|---|---|---|---|
| Person with significant control | BURTON CONTRACTORS LIMITED | 🇬🇧Regno Unito | Active | 02/05/2024 – present |
| Officer | ARUGANI LIMITED | 🇬🇧Regno Unito | Dissolved | 29/04/2026 – 18/11/2019 |
| Officer | BURTON CONTRACTORS LIMITED | 🇬🇧Regno Unito | Active | 09/02/2026 – present |
| Officer | GLENCORE SERVICES (UK) LIMITED | 🇬🇧Regno Unito | Active | 09/01/2026 – present |
| Officer | XSTRATA LIMITED | 🇬🇧Regno Unito | Active | 12/01/2026 – present |
| Officer | XSTRATA VENTURES (UK) LIMITED | — | Dissolved | 23/05/2026 – present |
| Officer | PODLAB LIMITED | — | Dissolved | 08/06/2026 – 31/08/2011 |
| Officer | CPDCAST.COM LIMITED | — | Dissolved | 08/06/2026 – 31/08/2011 |
| Officer | INFORMA GROUP HOLDINGS LIMITED | — | Active | 31/05/2026 – 31/08/2011 |
| Officer | GREENBOTTLE LIMITED | — | Dissolved | 13/06/2026 – 29/08/2011 |
| Officer | INFORMA HEALTHCARE LIMITED | — | Dissolved | 06/06/2026 – present |
| Officer | MARKETLINE INTERNATIONAL LIMITED | — | Dissolved | 11/06/2026 – present |
| Officer | COMPUTERWIRE LIMITED | — | Dissolved | 15/06/2026 – present |
| Officer | INFORMA ACQUISITIONS FINANCE LIMITED | — | Dissolved | 07/06/2026 – 31/08/2011 |
| Officer | INFORMA ACQUISITIONS (HOLDINGS) LIMITED | — | Dissolved | 08/06/2026 – 31/08/2011 |
| Officer | DIGITAL MEDIA PUBLISHING LTD | — | Dissolved | 15/06/2026 – present |
| Officer | TAYLOR & FRANCIS GROUP LIMITED | 🇬🇧Regno Unito | Active | 13/03/2026 – 31/08/2011 |
| Officer | INFORMA THREE LIMITED | 🇬🇧Regno Unito | Active | 13/03/2026 – 31/08/2011 |
| Officer | IBC (TEN) LIMITED | 🇬🇧Regno Unito | Active | 13/03/2026 – 31/08/2011 |
| Officer | INFORMA SIX LIMITED | 🇬🇧Regno Unito | Active | 13/03/2026 – 31/08/2011 |
| Officer | MILLER HEIMAN GROUP (UK) LIMITED | 🇬🇧Regno Unito | Active | 13/05/2026 – 31/08/2011 |
| Officer | BARHAM PHOTOGRAPHIC LIMITED | 🇬🇧Regno Unito | Dissolved | 03/02/2026 – present |
| Officer | INFORMA OVERSEAS INVESTMENTS LIMITED | — | Active | 13/03/2026 – 31/08/2011 |
31/05/2026
Switzerland → United Kingdom
23/05/2026
United Kingdom → Switzerland
16/06/2006
appointed