| AD- Forum Health Care Ltd | London | 2015 |
| Ad-Deen Al-Khalis Community Interest Company | Ilford | 2025 |
| Ad-Ork Healthcare Ltd | Salford | 2022 |
| Ad.Nh. Limited | Ellesmere Port | 2025 |
| AD02 Ltd | Newcastle | 2018 |
| AD10 Limited | Leeds | 2019 |
| AD10 Services Ltd | London | 2025 |
| AD24 Ltd | Wellington | 2018 |
| AD2WISE UK Limited | London | 2008 |
| AD3 Healthcare Ltd | Northampton | 2018 |
| ADA Aesthetics Leicester Limited | London | 2025 |
| ADA Agunwah Consultancy Limited | Woodford Green | 2013 |
| ADA Care Limited | Keighley | 2007 |
| ADA Childcare Services Limited | Milton Keynes | 2024 |
| ADA Diagnostics Ltd. | Birmingham | 2019 |
| ADA Digital Health Ltd. | London | 2016 |
| ADA Health Ltd | Chelmsford | 2015 |
| ADA Medical Ltd | Ilford | 2014 |
| ADA Medical Services Ltd | Redhill | 2023 |
| Ada+Me Ltd | Nottingham | 2024 |
| Adaba Awoo and Community Project CIC | London | 2024 |
| Adabaraash Limited | Harlow, Essex | 2024 |
| Adac Global Ltd | Harlow, Essex | 2021 |
| Adac Healthcare Ltd | Aberdeen | 2026 |
| Adaco Healthcare Ltd | Nuneaton | 2020 |
| Adada Healthcare Group Ltd | Chester | 2015 |
| Adada Ltd. | Chester | 2017 |
| Adade Ltd | Barking | 2025 |
| Adadebo Ltd | Botley | 2024 |
| Adadent Ltd | London | 2023 |
| Adadzewa Services Limited | Wolverhampton | 2020 |
| Adaez Group Limited | Leicester | 2022 |
| Adaeze Limited | London | 2021 |
| Adagoff & Sons Limited | Morden | 2016 |
| Adahs Clinic Ltd | Manchester | 2025 |
| Adahsa Limited | St. Albans | 2014 |
| Adai Ltd | London | 2005 |
| Adaiah Yahaya Ltd | London | 2023 |
| Adaja Associates Ltd. | London | 2026 |
| Adajour Limited | London | 2020 |
| Adajov Care Solutions Ltd | Colchester | 2017 |
| Adak Health Limited | London | 2022 |
| Adalah Residential Rest Home Ltd | Leigh-On-Sea | 2006 |
| Adalaisa Aesthetics Ltd | Wakefield | 2026 |
| Adalena House Ltd | Blackpool | 2021 |
| Adalexnelo Ltd | Grays | 2024 |
| Adali Healthcare Ltd | Witney | 2015 |
| Adaline Medical & Consulting Limited | Nantwich | 2023 |
| Adalink Medical Services Ltd. | Ilford | 2014 |
| Adam & EVE Enterprises Ltd | Cardiff | 2018 |
| Adam & Macewen Limited | Glasgow | 2005 |
| Adam (Birmingham) Ltd | Birmingham | 2015 |
| Adam (NW) Ltd | Preston | 2012 |
| Adam a Dent Ltd | Wolverhampton | 2025 |
| Adam Aesthetics Limited | South Croydon | 2021 |
| Adam and Edith Ltd | Norwich | 2024 |
| Adam Armitage Limited | Stockton-On-Tees | 2015 |
| Adam Auld Footcare Limited | Edinburgh | 2017 |
| Adam Bahadur Limited | Bristol | 2018 |
| Adam Bray Dermatology Ltd | Westbury On Trym | 2012 |
| Adam Brooks Ltd | Ashford | 2009 |
| Adam Brooks Orthopaedics Limited | Swindon | 2021 |
| Adam C Amer Limited | Nottingham | 2005 |
| Adam Carr Chiropractic Limited | Sheffield | 2012 |
| Adam Carruthers Limited | Liverpool | 2021 |
| Adam Dobson Ltd | Wilmslow | 2016 |
| Adam Drouet Ltd | Truro | 2012 |
| Adam Drummond Sports Medicine Limited | Leeds | 2024 |
| Adam Enaz Consulting Ltd | London | 2023 |
| Adam Franks Limited | Blackpool | 2016 |
| Adam Glassford Limited | Halifax | 2013 |
| Adam Gornall Limited | Shrewsbury | 2019 |
| Adam Gray Physiotherapy Limited | Preston | 2026 |
| Adam Green@Committedcoaches Ltd | Brigg | 2025 |
| Adam Harden Care Limited | London | 2006 |
| Adam Hawley Limited | Southampton | 2019 |
| Adam Health and Wellbeing Limited | Mildenhall | 2025 |
| Adam Healthcare Limited | Birmingham | 2018 |
| Adam Heetun Limited | Blandford Forum | 2025 |
| Adam J Booth Ltd | Chandlers Ford | 2013 |
| Adam Janjua Limited | Lytham St. Annes | 2014 |
| Adam Jones Medical Limited | Oxford | 2010 |
| Adam Joseph Homes Ltd | Nottingham | 2022 |
| Adam Jowett Orthodontics Ltd | Hove | 2022 |
| Adam KAY Chiropractic Limited | Borehamwood | 2011 |
| Adam Kenny Physiotherapy Ltd | Halifax | 2020 |
| Adam Kuczynski Limited | New Malden | 2012 |
| Adam Kutereba Ltd | Manchester | 2021 |
| Adam Lewis Limited | Edinburgh | 2025 |
| Adam Loveday Eyecare Ltd | Bedford | 2014 |
| Adam Medical Limited | Southport | 2010 |
| Adam Mohammed ALI Limited | Eastbourne | 2021 |
| Adam Norris Dental Laboratory Limited | Billericay | 2009 |
| Adam Oates Radiology Services Limited | Birmingham | 2014 |
| Adam Okane Limited | Liverpool | 2010 |
| Adam Omfs Ltd | Ormskirk | 2024 |
| Adam Optical Ltd | Glasgow | 2016 |
| Adam Orthopaedics Ltd | Ormskirk | 2023 |
| Adam Outreach Project Ltd | St Neots | 2006 |
| Adam Patel 2 Ltd | Leicester | 2023 |