| Person with significant control | W.R.KERN ORGANISATION LIMITED(THE) | 🇬🇧Regno Unito | Active | 08/12/2025 – present |
| Person with significant control | INFORMA PRESTIGE HOLDINGS LIMITED | 🇬🇧Regno Unito | Active | 08/12/2025 – present |
| Person with significant control | BOAT INTERNATIONAL BUSINESS LIMITED | 🇬🇧Regno Unito | Active | 08/12/2025 – present |
| Person with significant control | BRIDGE EVENT TECHNOLOGIES LIMITED | 🇬🇧Regno Unito | Active | 23/06/2024 – present |
| Person with significant control | INFORMA CONNECT HOLDINGS LIMITED | 🇬🇧Regno Unito | Active | 24/06/2024 – present |
| Person with significant control | TU-AUTOMOTIVE LIMITED | — | Active | 21/06/2024 – present |
| Person with significant control | MRO PUBLICATIONS LIMITED | 🇬🇧Regno Unito | Active | 26/06/2024 – present |
| Person with significant control | TAYLOR & FRANCIS LIMITED | 🇬🇧Regno Unito | Active | 21/06/2024 – present |
| Person with significant control | INFORMA PROPERTY (COLCHESTER) LIMITED | 🇬🇧Regno Unito | Active | 21/06/2024 – present |
| Person with significant control | MRO EXHIBITIONS LIMITED | 🇬🇧Regno Unito | Active | 23/06/2024 – present |
| Person with significant control | PENTON COMMUNICATIONS EUROPE LIMITED | 🇬🇧Regno Unito | Active | 20/06/2024 – present |
| Person with significant control | INFORMA TECH RESEARCH LIMITED | 🇬🇧Regno Unito | Active | 24/06/2024 – 16/12/2020 |
| Person with significant control | IBC (TWELVE) LIMITED | 🇬🇧Regno Unito | Active | 23/06/2024 – present |
| Person with significant control | TU-AUTOMOTIVE HOLDINGS LIMITED | — | Dissolved | 21/06/2024 – present |
| Person with significant control | MRO NETWORK LIMITED | 🇬🇧Regno Unito | Dissolved | 26/06/2024 – present |
| Person with significant control | IBC (TEN) LIMITED | 🇬🇧Regno Unito | Active | 24/06/2024 – present |
| Person with significant control | INFORMA OVERSEAS INVESTMENTS LIMITED | — | Active | 22/06/2024 – present |
| Person with significant control | INFORMA HOLDINGS LIMITED | 🇬🇧Regno Unito | Active | 26/06/2024 – present |
| Person with significant control | TAYLOR & FRANCIS GROUP LIMITED | 🇬🇧Regno Unito | Active | 26/06/2024 – present |
| Person with significant control | INFORMA US HOLDINGS LIMITED | — | Active | 21/06/2024 – present |
| Person with significant control | INFORMA INVESTMENT PLAN TRUSTEES LIMITED | 🇬🇧Regno Unito | Active | 26/06/2024 – present |
| Person with significant control | INFORMA THREE LIMITED | 🇬🇧Regno Unito | Active | 23/06/2024 – present |
| Person with significant control | INFORMA TELECOMS & MEDIA LIMITED | 🇬🇧Regno Unito | Active | 27/04/2024 – 17/04/2024 |
| Person with significant control | INFORMA SIX LIMITED | 🇬🇧Regno Unito | Active | 26/06/2024 – present |
| Person with significant control | INFORMA SERVICES LIMITED | 🇬🇧Regno Unito | Active | 26/06/2024 – present |
| Person with significant control | INFORMA COSEC LIMITED | 🇬🇧Regno Unito | Active | 26/06/2024 – present |
