| AHZ Consultants Ltd | Morden | 2024 |
| AHZ Enterprise Limited | Nottingham | 2021 |
| AHZ Services Limited | London | 2022 |
| AI & IA Ltd | Bradford | 2023 |
| AI 2 Bedside Ltd | Harrow | 2024 |
| AI 4 the Future Limited | Worcester | 2021 |
| AI Aesthetic Medicine Ltd | London | 2026 |
| AI and Industry Limited | London | 2020 |
| AI Art Foundation Ltd | London | 2024 |
| AI Biomed Limited | Cheltenham | 2023 |
| AI Care 2023 Limited | Woking | 2023 |
| AI Care 2024 Limited | Woking | 2023 |
| AI Care RC Limited | Woking | 2023 |
| AI Care SEC Limited | Woking | 2023 |
| AI Care SL Limited | Woking | 2023 |
| AI Care Topco Limited | Woking | 2024 |
| AI Cosmetic Ltd | London | 2019 |
| AI Diagnostics London Limited | Bath | 2023 |
| AI Digital Healthcare Limited | Brentwood | 2019 |
| AI Eyecare Limited | Blackburn | 2025 |
| AI Gill Ltd | Edinburgh | 2025 |
| AI Health London Limited | London | 2021 |
| AI Imaging Limited | London | 2014 |
| AI Mars Life Ltd | Harrow | 2024 |
| AI MED Innovations Limited | Wakefield | 2025 |
| AI MED Services Ltd | Solihull | 2025 |
| AI Medica Ltd | Blackburn | 2021 |
| AI Medical City Ltd | London | 2025 |
| AI Medical Limited | Leeds | 2015 |
| AI Medical Services Ltd | Wigan | 2023 |
| AI Medtech Limited | Romford | 2025 |
| AI Ophthalmic Services Limited | Birmingham | 2004 |
| AI Ophthalmology Ltd | Norwich | 2026 |
| AI Optics Ltd | Huddersfield | 2025 |
| AI Optometry Limited | Essex | 2024 |
| AI Pharm (Sheffield) Limited | Sheffield | 2022 |
| AI Pharm Ltd | Birmingham | 2021 |
| AI Pharma Consulting Limited | St. Ives | 2019 |
| AI Physicians Limited | Rugby | 2024 |
| AI Polak Professional Care Limited | Crewe | 2022 |
| AI Psychology Ltd | Birmingham | 2018 |
| AI Radiography Solutions Ltd | Sittingbourne | 2024 |
| AI Radiology Limited | Manchester | 2021 |
| AI Total Health Limited | London | 2025 |
| AI Vision Clinic Ltd | London | 2020 |
| AI1 Dent Ltd | Glasgow | 2024 |
| AIA Corporation Ltd | Huddersfield | 2022 |
| AIB Cardiology Consultant Limited | Doncaster | 2022 |
| AIB Kingpin Solutions Group Ltd | London | 2022 |
| AIB Medical Services Ltd | Amersham | 2017 |
| AIB Pharma Ltd | Leeds | 2025 |
| Aibes Care Ltd | Spalding | 2018 |
| Aibn Ltd | Stockport | 2026 |
| Aibo Platform Ltd | London | 2024 |
| AIC Locum Ltd | Bolton | 2024 |
| AIC Performance LAB Ltd | North Warnborough | 2026 |
| Aice Clinical Psychology Services Ltd | Doncaster | 2018 |
| Aich Limited | Otley | 2023 |
| Aichill Medical Ltd | Romford | 2026 |
| Aics (Acquired Injury Care & Support) Ltd | Uxbridge | 2012 |
| AID 4 Ummah | Blackburn | 2014 |
| AID a Life Limited | London | 2025 |
| AID and Empower Foundation | Newcastle | 2024 |
| AID for People Foundation Ltd | London | 2015 |
| AID Fund Ltd | Solihull | 2019 |
| AID Homecare Limited | Bury St. Edmunds | 2020 |
| AID in Medicare & Education Limited | Chertsey | 2009 |
| AID Pro Limited | London | 2025 |
| AID the Congo DRC Limited | Ilford | 2021 |
| AID With Care Limited | Ashford | 2015 |
| AID2RECOVERYUK Limited | Pontypridd | 2025 |
| AID2YOU Healthcare Ltd | Leeds | 2018 |
| Aida Coaching Ltd | London | 2023 |
| Aida Health Solutions Limited | Cardiff | 2025 |
| Aida Hygiene Ltd | London | 2023 |
| Aidaabas Limited | Bristol | 2012 |
| Aidacare Limited | Hitchin | 2021 |
| Aidan Fitzgerald Ltd | Wilmslow | 2013 |
| Aidan Heywood Chiro Limited | Hebburn | 2025 |
| Aidapt Bathrooms Limited | St Helens | 1990 |
| Aidares Care Limited | Romford | 2018 |
| Aidecare Ltd | Northampton | 2012 |
| Aideen Smith Counselling Limited | Crewe | 2021 |
| Aidel Smiles Ltd | Oldham | 2016 |
| Aiden Care Limited | Horsham | 2016 |
| AIDEN22 Ltd | Sutton | 2024 |
| Aidence UK Ltd | London | 2020 |
| Aidera Health Ltd | London | 2025 |
| Aidhour Limited | Salisbury | 1998 |
| Aiding Depression and Mental Health CIC | Milton Keynes | 2019 |
| Aiding Hands Limited | London | 2025 |
| Aiding Independence Ltd | Ramsgate | 2006 |
| Aidmeuk Ltd | York | 2023 |
| Aidn Limited | London | 2026 |
| Aids Care Education and Training | London | 1988 |
| Aids Healthcare Foundation UK | Croydon | 2018 |
| Aids Impact | Oxford | 1993 |
| Aidua Ltd | Lewes | 2026 |
| Aidway Supported Housing CIC | Birmingham | 2025 |
| AIE Health Ltd | London | 2023 |