| Alexandria Medical Services Ltd | London | 2020 |
| Alexandria Medics Ltd | Burton-On-Trent | 2026 |
| Alexandria.Winrow Ltd | Preston | 2026 |
| Alexandrina ’S Healthcare Limited | Bathgate | 2021 |
| Alexandropoulou Ltd | Esher | 2019 |
| Alexandros Kouloumpinis Limited | North Ferriby | 2022 |
| Alexandros Zeimpekis Ltd | Derby | 2025 |
| Alexandru Health Ltd | Norwich | 2013 |
| Alexandru Healthcare Limited | Manchester | 2016 |
| Alexandrucare Ltd | Norwich | 2022 |
| Alexca Ltd | Torquay | 2024 |
| Alexcadar Limited | King'S Lynn | 2019 |
| Alexcafecare Ltd | Eastbourne | 2019 |
| Alexchris Ltd | London | 2019 |
| Alexdule Ltd | Kelso | 2025 |
| Alexemm Limited | Coventry | 2014 |
| Alexeranz Ltd | London | 2023 |
| Alexes Care Services Limited | Dagenham | 2018 |
| Alexgoodland Limited | Castle Cary | 2020 |
| Alexia Chandler BDS Limited | Rugby | 2026 |
| Alexia Lescure Ltd | Maidstone | 2014 |
| Alexia Marlton Ltd | Feltham | 2021 |
| Alexian Brothers of the Province of the Sacred Heart (the) | Crawley | 1963 |
| Alexima Ltd | Lichfield | 2014 |
| Alexin Healthcare C.I.C. | Ilkeston | 2013 |
| Alexis and Family Ltd | Barking | 2017 |
| Alexis Bell Limited | London | 2015 |
| Alexis Foko Thanks Ltd | Leeds | 2020 |
| Alexis Healthcare Recruitment and Service Limited | Tonypandy | 2022 |
| Alexis Healthcare Services Limited | Chelmsford | 2025 |
| Alexis Management Services Limited | Burton-On-Trent | 2015 |
| Alexis Rose Coaching Ltd | London | 2020 |
| Alexis Zander Ltd | London | 2021 |
| Alexjcb Ltd | New Milton | 2022 |
| Alexkare Support and Care Ltd | Wirral | 2023 |
| Alexmed Ltd | Altrincham | 2009 |
| Alexmluis Care Ltd | Heywood | 2021 |
| Alexnem Limited | Glasgow | 2015 |
| Alexopoulou Anaesthetics Limited | Eltham | 2022 |
| Alexoscopy Limited | Westcliff On Sea | 2021 |
| Alexovie & Co Ltd | Chatham | 2020 |
| Alexrus Care Solutions Limited | Abingdon | 2019 |
| Alexsyl Consultancy Limited | Corby | 2014 |
| Alextikta Limited | Glasgow | 2025 |
| Alextom Limited | St. Helens | 2022 |
| ALEXX2ANNA Limited | London | 2021 |
| Alexxus Ltd | Sutton | 2022 |
| Alexy and Sainty Healthcare Ltd | Wolverhampton | 2023 |
| Alexy Minders Ltd | London | 2019 |
| Alexzel Health Care Limeted Ltd | Whitley Bay | 2022 |
| Aleysha Ltd | Hailsham | 2019 |
| Alezosyl Consultancy Ltd | Luton | 2023 |
| ALF Bass Medical Reporting Ltd | Warrington | 2009 |
| ALF Care Inspire Ltd | Manchester | 2019 |
| Alfa Anaesthetics Limited | Wigan | 2019 |
| Alfa and Omega Health Limited | London | 2025 |
| Alfa Care and Protection Limited | London | 2021 |
| Alfa Dental Limited | East Sussex | 2007 |
| Alfa Inc Ltd | Swansea | 2012 |
| Alfa Medica Healthcare Services Ltd | London | 2016 |
| Alfa Medica Ltd | Walton On The Hill | 2012 |
| Alfa Medical Services Limited | Birmingham | 2017 |
| Alfa Medics Limited | Beckenham | 2009 |
| Alfa Oral Care Services Ltd | Southampton | 2021 |
| Alfa Physio Limited | Derby | 2017 |
| Alfa Smile Ltd | Cambridge | 2023 |
| Alfa Surgical Clinic Ltd | Harrow | 2023 |
| Alfa Z Health Ltd | Sutton Coldfield | 2019 |
| Alfa&Omega Ltd | Chippenham | 2023 |
| Alfad Limited | Brighton | 2019 |
| Alfalah Care and Support Services Limited | Thornton Lodge | 2023 |
| Alfamed Healthcare and Security Services Ltd | Littlehampton | 2016 |
| Alfamed Specialist Emergency Care Ltd | Nuneaton | 2023 |
| Alfanar | London | 2004 |
| Alfann Limited | Northampton | 2020 |
| Alfano Medics Ltd | Wokingham | 2020 |
| Alfanoso Ltd | Manchester | 2023 |
| Alfaradhi Medical Ltd | Ilford | 2025 |
| Alfaraj Ltd | Luton | 2026 |
| Alfarook Limited | Manchester | 2026 |
| Alfarooq Limited | Harlow | 2022 |
| Alfasync Ltd | Harrogate | 2023 |
| Alfdot Ventures Ltd | Buckingham | 2018 |
| Alfhaily Limited | Colchester | 2014 |
| Alfie Jones Limited | London | 2013 |
| Alfie Medical Ltd | London | 2020 |
| Alfie's Complex Care Ltd | London | 2026 |
| Alfie’S Healthcare Limited | Leeds | 2024 |
| Alfisags Radiology Ltd | Derby | 2024 |
| Alfold Medical Aesthetics Ltd | Billingshurst | 2025 |
| Alfons Services Ltd | Edgware | 2020 |
| Alford House | London | 2008 |
| Alfordmet Limited | Swansea | 2024 |
| Alfred Healthcare UK Ltd | West Midlands, Birmingham | 2023 |
| Alfredo Consultancy Ltd | Portsmouth | 2026 |
| Alfriston Care Ltd | Cheltenham | 2023 |
| Alftakins Care Ltd | Oxford | 2026 |
| Alfurqan DAR Alquran Limited | London | 2021 |
| Alfy Care Services Limited | Dagenham | 2016 |
| ALG Advisory Ltd | Wimbledon | 2026 |