| Alan Lindsay Consultancy Limited | Ascot | 2024 |
| Alan Mansford Ltd | Derbyshire | 2021 |
| Alan Mcdermott Books Limited | Worthing | 2013 |
| Alan Moulsdale Consulting Limited | Stansted | 2016 |
| Alan Nixon Ltd | Warrington | 2016 |
| Alan Owens Inc Ltd | Redhill | 2012 |
| Alan Paling Limited | Leeds | 2009 |
| Alan Partridge Limited | London | 2012 |
| Alan Price Music Limited | London | 1966 |
| Alan Riley Holdings Ltd | London | 2026 |
| Alan Rogers Guides Limited | East Grinstead | 2023 |
| Alan Shoots Ltd | Gravesend | 2022 |
| Alan Smith IT Limited | Coventry | 2015 |
| Alan Tarney Limited | Banstead | 1980 |
| Alan the Cat Ltd | Henstridge | 2010 |
| Alan Thomson Simulation Limited | Cambridge | 2019 |
| Alan Traders Limited | Woodford Green | 2023 |
| Alan Weekes Media Ltd | Middleton | 2014 |
| Alan Wells Camera Services Ltd | Camberley | 2001 |
| Alan Zucconi Ltd | London | 2013 |
| Alana AI Limited | London | 2019 |
| Alana Labs Ltd | London | 2026 |
| Alana Marmion-Warr Limited | Horley | 2015 |
| Alanclarkdesign Limited | Wilmslow | 2024 |
| Alandar Ltd | Port Talbot | 2019 |
| Alandarev Limited | Bristol | 2016 |
| Alanglobal Ltd | London | 2025 |
| Alango Events Consulting International Ltd | Ruislip | 2018 |
| Alani Tech Ltd | London | 2017 |
| Alanis TV Ltd | Ilford | 2020 |
| Alanite Software Ltd | Stoke-On-Trent | 2026 |
| Alankrit Consultancy Services Ltd | Glasgow | 2022 |
| Alanna MAX Ltd | London | 2018 |
| Alannah Tandy Pilbrow Ltd | Coventry | 2025 |
| Alanpoza Ltd | West Bromwich | 2015 |
| Alantas Limited | Milton Keynes | 2011 |
| Alantescil Technology Group Ltd | London | 2025 |
| Alanyhq Networks Limited | Kington | 2020 |
| Alanza Ltd | London, | 2024 |
| Alao Publishing Ltd | London | 2024 |
| Alao Solutions Limited | London | 2018 |
| Alaoui Solutions Ltd | London | 2023 |
| Alapa Solutions Limited | London | 2011 |
| Alar Limited | London | 2019 |
| Alar Software Limited | Newcastle Upon Tyne | 2021 |
| Alara Studios Ltd | Poole | 2026 |
| Alaraby Aljadeed Ltd | London | 2014 |
| Alaraby Television Network Limited | London | 2013 |
| Alarancorp Ltd | Tilbury | 2025 |
| Alarcon Music Limited | London | 1992 |
| Alarcon.I.T Ltd | London | 2020 |
| Alarian Technologies Ltd | London | 2024 |
| Alarm Games Limited | Southport | 2024 |
| Alarm Pictures Limited | London | 2014 |
| Alarm Smart Analytics Ltd | Edinburgh | 2026 |
| Alaro Ltd | London | 2024 |
| Alas Outsourcing Limited | Aberdeen | 2025 |
| Alasdair J Macleod Consulting Ltd | Fortrose | 2019 |
| Alasdair R Maclean Limited | Stornoway | 2017 |
| Alaseo Limited | Northampton | 2015 |
| Alashrafs Ltd | Keighley | 2019 |
| Alasia Consulting Ltd | Waltham Cross | 2012 |
| Alasia Intelligence Ltd | Derby | 2025 |
| Alasin Ltd | London | 2026 |
| Alaska Blue Limited | Tamworth | 2026 |
| Alaska Group Ltd | Ilford | 2025 |
| Alaska TV Productions Limited | High Wycombe | 2010 |
| Alastair Christie Limited | Salisbury | 2012 |
| Alastair Cragg Limited | Crewe | 2018 |
| Alastair Deacon Ltd | London | 2015 |
| Alastair Humphreys Ltd | Gravesend | 2017 |
| Alastair IR Limited | London | 2025 |
| Alastair O'Shea Ltd | London | 2015 |
| Alastair Young Marketing Consultancy Ltd | Morden | 2014 |
| Alastra Labs Ltd | London | 2024 |
| Alatar Group Ltd | London | 2026 |
| Alation UK Ltd | Cheltenham | 2018 |
| Alatra Media Group Ltd | London | 2019 |
| Alatus Publishing Limited | Norwich | 2025 |
| Alatus Tech Ltd | London | 2023 |
| Alauda Arvensis Ltd | London | 2021 |
| Alaukik Limited | Cambridge | 2023 |
| Alav Technology Limited | Thame | 2020 |
| Alavai Productions Limited | | 1998 |
| Alavala Limited | Grays | 2024 |
| Alavander Ltd | Faringdon | 2021 |
| Alavanderaert Limited | Coventry | 2023 |
| Alavida Ltd | London | 2025 |
| Alaviks Ltd. | Cardiff | 2020 |
| Alavio Digital Support Solutions Limited | Bury St. Edmunds | 2024 |
| Alaw Technologies Limited | Hatfield | 2022 |
| Alawi Books Ltd. | London | 2014 |
| Alawi IT Solutions Limited | London | 2022 |
| Alaxiom Ltd | Bath | 2011 |
| Alaya Creative Media Ltd | Worcester | 2025 |
| Alaya PVT Limited | Hatfield | 2022 |
| Alaye Holdings Ltd | Tilbury | 2026 |
| Alayic Ltd | Congleton | 2025 |
| Alayo Melody Singer International Ltd | Oldham | 2025 |
| Alazen Ltd | Fleet | 2012 |