| Acucert Training Ltd | Cambridge | 2020 |
| Acudemy Limited | London | 2013 |
| Acuere Limited | Dereham | 2019 |
| Acuity Edtech (UK) Ltd | Cardiff | 2022 |
| Acuity Learning Academy Ltd | Basingstoke | 2023 |
| Acuity Learning and Development Limited | Motherwell | 2018 |
| Acuity Professional Foundation | Bexhill | 2017 |
| Acuity Training Limited | Guildford | 2011 |
| Acumen Associates Ltd | Stratford-Upon-Avon | 2008 |
| Acumen Care Education Limited | Cardiff | 2019 |
| Acumen International Ltd | Carshalton | 2023 |
| Acumen Logic Ltd | Norwich | 2024 |
| Acumen Tuition Limited | Walsall | 2018 |
| Acumist Education Limited | Windlesham | 2023 |
| Acumoglobal Limited | London | 2025 |
| Acun Education Consultancy Ltd | London | 2020 |
| Acunova Acupuncture Limited | Ipswich | 2025 |
| Acupuncture and Movement Limited | London | 2023 |
| Acupuncture Training Providers Ltd | Newcastle | 2015 |
| Acura Wellness Ltd | Derby | 2023 |
| Acuregen Limited | Colchester | 2010 |
| Acurim Limited | Meifod | 2013 |
| Acute & Critical Care Education Ltd | London | 2019 |
| Acute Ambulance & Medical Services (Training & Events) Ltd | Milton Keynes | 2009 |
| Acute Medical Education Ltd | Brighouse | 2022 |
| Acute Training Solutions Limited | Cardiff | 2008 |
| AD & GC Investments Limited | Bath | 2010 |
| AD & R Limited | Burbage | 2007 |
| AD Altum Ltd | London | 2026 |
| AD Astra (Broadening Horizons) Limited | York | 2015 |
| AD Astra Academy Trust | Hartlepool | 2014 |
| AD Astra Education Consultancy Limited | Banchory | 2025 |
| AD Astra Education Ltd | Buckinghamshire | 2025 |
| AD Astra Learning Ltd | Slough | 2015 |
| AD Astra Theatre School Limited | Romford | 2013 |
| AD Astra Training Ltd | Huddersfield | 2023 |
| AD Astra Tuition Ltd | Slough | 2013 |
| AD Astra Tutoring Ltd | Brigg | 2026 |
| AD Aviation Ltd | Hounslow | 2019 |
| AD Coaching Ltd | Laindon | 2025 |
| AD Education Consultants Ltd | Birmingham | 2020 |
| AD Education Ltd | Sheffield | 2021 |
| AD HOC Advice Ltd | Glasgow | 2021 |
| AD HOC LAB Ltd | London | 2026 |
| AD International Education Limited | Woking | 2025 |
| AD Lucem Ltd. | London | 2024 |
| AD Property Training Ltd | Sheffield | 2021 |
| AD Sports Coaching Ltd | Boston | 2023 |
| AD Swim Club Limited | Hyde | 2023 |
| AD Tsakok Mathematical Centre Ltd | London | 2025 |
| AD Tutoring Limited | London | 2016 |
| Ad-Hoc Coaching Ltd | Dunblane | 2026 |
| ADA Anambra State UK Ltd | Grays | 2022 |
| ADA Counselling Ltd | London | 2022 |
| ADA Education Ltd | Rugby | 2025 |
| ADA House CIC | London | 2026 |
| Adada Recruitment and Training Services (Arts) Ltd | Chester | 2019 |
| Adagio School of Dance Limited | Brentwood | 2014 |
| Adagio Sostenuto Ltd | London | 2025 |
| Adalah UK Limited | London | 2017 |
| Adam and Annalisa.Love Limited | Winchester | 2023 |
| Adam and Eve's Children's Educational and Welfare Ltd | Slough | 2025 |
| Adam Ariff Coaching Ltd | Bolton | 2021 |
| Adam Bolder Sport Foundation CIC | Cottingham | 2026 |
| Adam Boxer Education Ltd | Edgware | 2025 |
| Adam Business Development Ltd | London | 2013 |
| Adam Cotton Driver Training Limited | Newtown | 2015 |
| Adam Cunard Ltd | Bognor Regis | 2018 |
| Adam Donnelly Fitness Ltd | Renfrew | 2023 |
| Adam Driving School Ltd | Hounslow | 2023 |
| Adam Education Trust Ltd | Hounslow | 2016 |
| Adam Griffiths Consulting Limited | Stonehouse | 2022 |
| Adam Harnett Golf Ltd | Southampton | 2025 |
| Adam Harper Boxing Clever CIC | Tewkesbury | 2022 |
| Adam Hedges Golf Limited | Orpington | 2024 |
| Adam Hoad Coaching Limited | London | 2026 |
| Adam International Academy Ltd | Oldham | 2026 |
| Adam J Mcgilvery Consulting Ltd | Bolton | 2009 |
| Adam Mickiewicz Polish Saturday School in Huddersfield | Brighouse | 2017 |
| Adam Options Academy Ltd | London | 2022 |
| Adam Rendell Ltd | Morpeth | 2022 |
| Adam Sprackling Limited | | 2000 |
| Adam Thomas Driving Solutions Ltd | Alcester | 2021 |
| Adam's Nation CIC | Chadderton | 2025 |
| Adam.Nvq Limited | Colchester | 2017 |
| Adamantine Global Training Academy Ltd | Broxburn | 2022 |
| Adamas Academy Ltd | Pontefract | 2025 |
| Adamgroupofeducation Ltd | Birmingham | 2019 |
| Adamira Driving School Ltd | Dumfries | 2025 |
| Adams Academy Inc. Ltd | London | 2017 |
| Adams Educational Services Limited | Kent | 2015 |
| Adams Family Group Limited | Newcastle Upon Tyne | 2019 |
| Adams Fothergill Ltd | Hove | 2015 |
| Adams Foundation Ltd | London | 2024 |
| Adams Global Academy Ltd | Paisley | 2025 |
| Adams Osteopathy Ltd | Hockliffe, Leighton Buzzard | 2025 |
| Adams Sports Academy Limited | Coventry | 2019 |
| Adams X Football Ltd | Swansea | 2026 |
| Adamsons Academy UK Ltd | London | 2022 |
| Adamu International Ltd | Ludlow | 2025 |