| Alden Language Services Ltd | Great Ayton | 2024 |
| Alder & YEW Woodcraft Ltd | London | 2025 |
| Alder Bridge Association for Steiner-Waldorf Education | Reading | 1987 |
| Alder Grove School Ltd | Bolton | 2026 |
| Alder Tree (Home Education Centre) CIC | Reading | 2022 |
| Alderbrook School | Solihull | 2011 |
| Alderflies Day Nursery Ltd | Willesden | 2025 |
| Alderley Day Nursery Limited | Burntwood | 2006 |
| Alderley Edge School for Girls | Chesire | 1991 |
| Alderley Football Coaching Limited | Wilmslow | 2022 |
| Alderley Playing Fields Limited(The) | Alderley Edge | 1968 |
| Alders Academy Ltd | Manchester | 2022 |
| Aldersbrook Stables Community CIC | Horley | 2023 |
| Aldersyde Nursery Limited | Cleveland | 2002 |
| Alderwood Guardians Ltd | London | 2023 |
| Aldesd-Uk Ltd | Nantwich | 2024 |
| Aldona Coaching Limited | London | 2016 |
| Aldridge Education | London | 2006 |
| Aldridge Premier Tuition Limited | Walsall | 2015 |
| Aldro School Educational Trust Limited | Godalming | 1968 |
| Aldwickbury School Trust Limited | Harpenden | 1969 |
| Aldworth King Ltd | Cardiff | 2022 |
| Aleap Knowledge Services Ltd | Coventry | 2017 |
| Aleat Ltd | London | 2025 |
| Alec Dunnachie Assessments Ltd | London | 2019 |
| Alec Hunter PRE School | Braintree | 2010 |
| Alecia's Study Space Ltd | Bury St. Edmunds | 2025 |
| Alef Noun Ltd | London | 2022 |
| Alef Trust CIC | Wirral | 2012 |
| Aleido Learning UK Limited | Warwick | 1994 |
| Alen.Learn Ltd | Manchester | 2017 |
| Alenra Global Ltd | Slough | 2025 |
| Alepservices Ltd | Wirral | 2026 |
| Alera Studio Ltd | Ellon | 2026 |
| Alere Ltd | Ormskirk | 2025 |
| Alert Drivers Training and Development Limited | Plymouth | 2018 |
| Alert Driving School Limited | Chesham | 2025 |
| Alesani Ltd | Abingdon | 2022 |
| Alescah Limited | Longfield | 2026 |
| Alesha Nonz Community Interest Company | Manchester | 2026 |
| Aletaha Academy Ltd | Birmingham | 2020 |
| Aletheia Academies Trust | Gravesend | 2011 |
| Aletheia Education Ltd | Brighton | 2025 |
| Aletheia Vision UK Ltd | Royal Tunbridge Wells | 2021 |
| Alethiome Ltd | London | 2025 |
| Alethya Technologies Ltd | London | 2019 |
| Alevelbiologytutor Limited | Winchester | 2018 |
| Aleveltutors.Online Limited | Winchester | 2022 |
| Aleverse Limited | London | 2009 |
| Alex Beevis Limited | Belfast | 2025 |
| Alex C&C Training Ltd | Bristol | 2023 |
| Alex Carter Enterprises Ltd | Chippenham | 2021 |
| Alex Chick Dressage Ltd | Nottingham | 2025 |
| Alex Cullum Limited | Bury St. Edmunds | 2023 |
| Alex D& D Training Limited | Erith | 2017 |
| Alex Danson 15 Limited | Romsey | 2016 |
| Alex Doffman Limited | Solihull | 2025 |
| Alex Etchart Arts Ltd | London | 2025 |
| Alex Fairlamb Consultancy Ltd | Newcastle Upon Tyne | 2025 |
| Alex Glew Music Ltd | Pontyclun | 2024 |
| Alex Hall Personal Training Ltd | Bristol | 2025 |
| Alex Instructor Ltd | Glasgow | 2023 |
| Alex James Training Academy Ltd | Rossendale | 2024 |
| Alex Leask Associates Limited | Rugby | 2013 |
| Alex Leon Fitness Ltd | Birmingham | 2021 |
| Alex Maclaren Associates Ltd | Folkestone | 2026 |
| Alex Murray Education Consultancy Limited | Southampton | 2025 |
| Alex Quigley Consultancy Limited | York | 2018 |
| Alex Smith Fitness Ltd | Farnborough | 2025 |
| Alex Snow Offroad Limited | Tiverton | 2021 |
| Alex Snow Racing Limited | Tiverton | 2023 |
| Alex Walker Education Limited | Torquay | 2023 |
| Alex Wood Psychology Ltd | Southsea | 2024 |
| Alexa Beauty and Aesthetics Ltd | Wembley | 2025 |
| Alexa Carenati Ltd | London | 2012 |
| Alexander Advisory Group Limited | Hitchin | 2025 |
| Alexander Community Development Limited | Dundee | 2020 |
| Alexander Consultancy and Training Limited | Bude | 2016 |
| Alexander Cromwell Training Ltd | London | 2013 |
| Alexander Farquharson Ltd | Ashtead | 2025 |
| Alexander Lennan Ltd | Southampton | 2022 |
| Alexander Maclean Limited | Preston | 2019 |
| Alexander Mills Consulting Ltd | Ruislip, | 2021 |
| Alexander Pathways Limited | Birmingham | 2026 |
| Alexander Sedgbeer Ltd | Harrogate | 2022 |
| Alexander Shtiebel | London | 2016 |
| Alexandra Academy Trust | Middlewich | 2016 |
| Alexandra Childcare Limited | Glasgow | 2017 |
| Alexandra Montessori Hammersmith Limited | London | 2017 |
| Alexandra Montessori Limited | Hounslow | 2016 |
| Alexandra Stobbs Limited | Boldon Colliery | 2026 |
| Alexandra Training Centre Ltd | Hounslow | 2019 |
| Alexandra Wellbeing C.I.C. | Coventry | 2026 |
| Alexandria Limited | London | 2026 |
| Alexandria's Private Tuition Limited | Bromley | 2025 |
| Alexandrian Craft | London | 2017 |
| Alexas Royal Beauty Academy Ltd | London | 2026 |
| Alexes Day Nursery Limited | Orpington | 2019 |
| Alexi Overseas Education Consultancy and Service Ltd | Newcastle Upon Tyne | 2022 |
| Alexz Educational Ltd | London | 2014 |