| Adrian Skinner Limited | Harrogate | 2002 |
| Adrian Turner Podiatry Limited | Farnborough | 2015 |
| Adriana Florina Healthcare Resources Limited | Knaresborough | 2017 |
| Adriana Garrasini Ltd | Cockermouth | 2018 |
| Adriana Limited | Monmouth | 2001 |
| Adrianaalina Ltd | Liverpool | 2017 |
| Adrianne Company Limited | Droitwich | 2016 |
| Adriano Sabia Limited | Ellesmere Port | 2021 |
| Adriel Supported Living Care Ltd | Sheffield | 2019 |
| Adrielle Services Limited | London | 2019 |
| Adriels Care and Assessments Ltd | West Drayton | 2021 |
| Adrien Darris Ltd | Farnborough | 2019 |
| Adrienne M Flanagan Limited | Stanmore | 2017 |
| Adrienne Therapy Ltd | Kington | 2024 |
| Adriennes Aesthetics Ltd | Glasgow | 2023 |
| Adrinika Limited | Chatham | 2018 |
| Adrit Limited | Welwyn | 2018 |
| Adrm Care Limited | Great Yarmouth | 2025 |
| Adro Limited | Bedford | 2025 |
| Adroit Care Team (ACT) Limited | Chorley | 2020 |
| Adroit Careplus Ltd | Ipswich | 2024 |
| Adroit Design Limited | Warmley | 2018 |
| Adroit Gideon Medical Ltd | Coventry | 2022 |
| Adroit Limited | Leicester | 2026 |
| Adroit Medical Services Limited | London | 2019 |
| Adroitvigilance Ltd | London | 2025 |
| Adrx Limited | Slough | 2010 |
| ADS 2 Health Limited | Slough | 2022 |
| ADS Aesthetic Artistry Limited | Buckhurst Hill | 2021 |
| ADS Care Limited | Wymondham | 2019 |
| ADS Care Services Ltd | Harrow On The Hill | 2023 |
| ADS Creations Ltd | Romsey | 2012 |
| ADS Dental Ltd | Brackley | 2016 |
| ADS EYE Clinic Limited | Houghton Le Spring | 2015 |
| ADS Gastro Limited | Norwich | 2020 |
| ADS Healthcare Ltd | Northampton | 2019 |
| ADS Imaging Ltd | London | 2024 |
| ADS Inner Space Exploration Ltd. | Ruislip, | 2024 |
| ADS Medical Group Ltd | Manchester | 2023 |
| ADS Newham Limited | London | 2022 |
| ADS Ortho Limited | Halesowen | 2023 |
| ADS Pharms Ltd | Bolton | 2015 |
| ADS WDC Limited | Edgware | 2021 |
| Adsa Medical Consulting Ltd | Solihull | 2012 |
| Adsakut Ltd | Nottingham | 2022 |
| Adsash Health Care Ltd | Halesowen | 2026 |
| Adservo Ltd | Mildenhall | 2024 |
| Adshroy Healthcare Services Limited | Northampton | 2025 |
| Adsin (Staffordshire) Ltd | Stoke On Trent | 2023 |
| Adskinandlaser Ltd | Liverpool | 2026 |
| Adsl Limited | Pulborough | 2021 |
| Adsl Services Limited | Colchester | 2018 |
| Adso Limited | London | 2013 |
| Adsomnum Limited | Leigh On Sea | 2013 |
| Adstaphimed Limited | Whitehaven | 2022 |
| Adstyle Services Limited | Tipton | 2025 |
| Adsu Medical Limited | Solihull | 2020 |
| Adsum Care & Support Limited | London | 2023 |
| Adsum Healthcare Limited | Steyning | 2002 |
| Adswad Ltd | Sheffield | 2012 |
| Adswood Lodge Health Care Limited | Sheffield | 2022 |
| ADT Chiropractic Ltd | Cardiff | 2017 |
| Adt-Healthcare Ltd | London | 2012 |
| ADT8 Limited | Eastbourne | 2026 |
| Adtherapies UK CIC | Glasgow | 2019 |
| ADU After School Club Limited | Uxbridge | 2026 |
| ADU Healthcare Ltd | Camberley | 2022 |
| Adu's Care Limited | Grimsby | 2013 |
| Aduanaba Company Ltd | Nottingham | 2020 |
| Adujacq Limited | Sutton | 2020 |
| Aduke Healthcare Agency Ltd | Basildon | 2022 |
| Adukkha Limited | Manchester | 2013 |
| Adularia Therapies and Consultancy "Independent Living" Limited | Gloucester | 2016 |
| Adularia Therapies and Consultancy Ltd | Gloucester | 2010 |
| Adularia Therapies and Consultancy Sussex Limited | Gloucester | 2016 |
| Adult Adhd & Autism Diagnostic Center Ltd | Hebburn | 2025 |
| Adult Adhd Care Ltd | Newtownards | 2022 |
| Adult Adhd Clinic Ltd | Maidenhead | 2022 |
| Adult Autism Assessments Limited | York | 2024 |
| Adult Counselling Therapy Limited | Andover | 2020 |
| Adult Healthcare Selby Ltd | Selby | 2016 |
| Adult Outreach and Support Ltd | Bexleyheath | 2014 |
| Adult Psychiatry Limited | Gloucester | 2025 |
| Adult Psychological Solutions Ltd | Buxton | 2003 |
| Adult Recovery Care Limited | London | 2021 |
| Adult Social Care Ltd | Birmingham | 2022 |
| Adult Social Work Partnerships Ltd | Liverpool | 2015 |
| Adult Supported Living Limited | Hornbeam Park, Harrogate | 2006 |
| Adult Transition Services Ltd | Brackley | 2019 |
| Adultino Healthcare Limited | Harrow | 2023 |
| Adults Move Lincolnshire CIC | Spalding | 2023 |
| Adults Supporting Adults (ASA Shared Lives) | Sleaford | 2004 |
| Adun Ltd | Dartford | 2024 |
| Adundara Services Ltd | Essex | 2023 |
| Adunni Babecare Limited | London | 2013 |
| Adunni Lend-A-Hand Limited | London | 2017 |
| Adunola Business Solutions Ltd | Warlingham | 2012 |
| Adunten Ltd | Rochester | 2013 |
| Aduparayil Ltd | Scarborough | 2023 |
| Adur Community Gateway CIC | Brighton | 2021 |