| Person with significant control | ZIHIPP LTD | 🇬🇧United Kingdom | Active | 08/12/2025 – present |
| Person with significant control | SEAGEN U.K. LTD. | — | Liquidation | 01/05/2024 – 30/04/2024 |
| Person with significant control | AUTIFONY THERAPEUTICS LIMITED | 🇬🇧United Kingdom | Active | 26/06/2024 – 12/01/2023 |
| Person with significant control | HALEON UK HOLDINGS (NO.2) LIMITED | 🇬🇧United Kingdom | Active | 10/04/2026 – 17/07/2022 |
| Person with significant control | CONSUMER HEALTHCARE HOLDINGS LIMITED | 🇬🇧United Kingdom | Active | 26/06/2024 – 01/08/2019 |
| Person with significant control | UPJOHN UK 2 LTD. | 🇬🇧United Kingdom | Active | 25/06/2024 – 16/11/2020 |
| Person with significant control | PFIZER R&D UK LIMITED | 🇬🇧United Kingdom | Active | 26/06/2024 – present |
| Person with significant control | PFIZER LIMITED | 🇬🇧United Kingdom | Active | 25/06/2024 – present |
| Person with significant control | PFIZER LEASING UK LIMITED | 🇬🇧United Kingdom | Active | 23/06/2024 – present |
| Person with significant control | — | — | Active | 25/06/2024 – present |
| Person with significant control | PHARMACIA LIMITED | 🇬🇧United Kingdom | Active | 22/06/2024 – present |
| Person with significant control | HAPTOGEN LIMITED | 🇬🇧United Kingdom | Liquidation | 22/06/2024 – present |
| Person with significant control | THIAKIS LIMITED | 🇬🇧United Kingdom | Liquidation | 26/06/2024 – present |
| Person with significant control | G.D.SEARLE & CO.LIMITED | 🇬🇧United Kingdom | Liquidation | 24/06/2024 – present |
| Person with significant control | MERIDIAN MEDICAL TECHNOLOGIES LIMITED | 🇬🇧United Kingdom | Dissolved | 22/06/2024 – 12/12/2021 |
| Person with significant control | PFIZER CONSUMER HEALTHCARE | 🇬🇧United Kingdom | Active | 26/06/2024 – present |
| Person with significant control | PFIZER SPECIALTY UK LIMITED | — | Liquidation | 26/06/2024 – present |
| Person with significant control | — | — | Active | 21/06/2024 – present |
