| Alpha Wealth Advisors Ltd | Orpington | 2024 |
| Alpha Wealth Management 369 Ltd | Goole | 2024 |
| Alpha Whiskey Surveyors Ltd | St Columb | 2017 |
| Alpha Worldwide Limited | Pevensey | 2005 |
| Alpha X Holding Ltd | Paisley | 2026 |
| Alpha X Industrial Service Limited | Grimsby | 2019 |
| Alpha Yachts Limited | Orpington | 2023 |
| Alpha Zeta Law Ltd | Morden | 2025 |
| Alpha Zulu Limited | London | 2018 |
| Alpha Zulu Whiskey Limited | Berkhamsted | 2022 |
| Alpha&Omega Lawyers Ltd | London | 2020 |
| Alpha, Engineering, Projects and Operational Systems Limited | Corby | 2017 |
| Alpha-Beta Signs Ltd | Hamilton | 2002 |
| Alpha-Beta Vickers Limited | Leeds | 1936 |
| Alpha-Financials Ltd | Hurst | 2008 |
| Alpha-Office Lincs Limited | Gainsborough | 2010 |
| Alpha-Omega Accountancy Ltd | Littleborough | 2019 |
| Alpha-Pryme Regeneris Protocol Ltd | London | 2026 |
| Alpha-Tec Party Wall Surveyors Ltd | Erith | 2019 |
| Alpha-Zeta Abseiling Limited | Bristol | 2015 |
| ALPHA1MACHINERY Limited | Norwich | 2018 |
| ALPHA2 Consulting Limited | London | 2019 |
| ALPHA2 Project Services Ltd | Warrington | 2020 |
| ALPHA22 Ltd | London | 2025 |
| ALPHA25 Ltd | Crawley | 2023 |
| ALPHA2OMEGA Consulting Ltd | Croydon | 2024 |
| ALPHA2OMEGA Contract Limited | Altrincham | 2024 |
| ALPHA2ZENITH Limited | London | 1999 |
| ALPHA7 Solutions Ltd | Aberdeen | 2016 |
| Alphaba Ltd | London | 2010 |
| Alphabet Bidco Limited | Aylesbury | 2020 |
| Alphabet City Solutions Ltd | London | 2025 |
| Alphabet Communications Limited | Bristol | 2017 |
| Alphabet Design Agency Ltd. | Manchester | 2016 |
| Alphabet Europe Holdings Ltd | London | 2024 |
| Alphabet Fitness Limited | Gainsborough | 2009 |
| Alphabet Healthcare Ltd | Abbots Langley | 2024 |
| Alphabet Holdings BC Limited | Wakefield | 2017 |
| Alphabet Industries Limited | Worcester | 2012 |
| Alphabet Intellectual Property Ltd | London | 2023 |
| Alphabet International Corporation Limited | London | 2012 |
| Alphabet Sign Makers Ltd | Sheffield | 2011 |
| Alphabet Signs (Commercial) Ltd | Bordon | 2015 |
| Alphabet Solutions Limited | Gainsborough | 2007 |
| Alphabet Soup Creative Limited | London | 2025 |
| Alphabet Street Advisory Limited | Solihull | 2022 |
| Alphabet Wills & Estate Planning Limited | London | 2025 |
| Alphabetclub.Com Limited | Shrewsbury | 2010 |
| Alphabeth Capital Ltd. | London | 2019 |
| Alphabetical Limited | London | 2010 |
| Alphabetical Order of Lebanon | Esher | 2019 |
| Alphabetta Ltd | London | 2006 |
| Alphabio Control Limited | Newmarket | 2000 |
| Alphabiomics Ltd | Newcastle Upon Tyne | 2018 |
| Alphabit Ltd | London | 2022 |
| Alphabond (Holdings) Limited | Northwich | 2014 |
| Alphabox Ltd | London | 2023 |
| Alphabridge Advisory UK Ltd | London | 2025 |
| Alphac Consulting Ltd | London | 2025 |
| Alphacap Partners Ltd | London | 2014 |
| Alphacath Ltd. | Chester | 2014 |
| Alphacello Limited | Downside | 2008 |
| Alphacheck Ltd | Wotton Under Edge | 2018 |
| Alphachem Consulting Ltd | Milton Keynes | 2025 |
| Alphaco Consulting Limited | London | 2012 |
| Alphacode Limited | London | 2024 |
| Alphacom Systems Ltd | Reading | 2024 |
| Alphacomm Solutions Limited | Stevenage | 2004 |
| Alphacore Services Limited | Milton Keynes | 2008 |
| Alphacron Ltd | Manchester | 2012 |
| Alphadata Technology Limited | Doncaster | 1997 |
| Alphadeltawhiskey Access Ltd | Hartlepool | 2026 |
| Alphadrill Limited | Aberdeen | 2010 |
| Alphaex Digital Ltd | London | 2018 |
| Alphafence Ltd | Abergavenny | 2008 |
| Alphafly Ltd | Cardiff | 2025 |
| Alphafredo Consulting Ltd | London | 2025 |
| Alphageo Ltd | Faringdon | 2020 |
| Alphagraph Nominees (Mara) Limited | London | 2024 |
| Alphagroupsolutions Ltd | Kington | 2025 |
| Alphahedge Consulting Ltd | Horsham | 2023 |
| Alphait Limited | Maidenhead | 2004 |
| Alphak Services Ltd | Ipswich | 2014 |
| Alphalaw Limited | London | 2002 |
| Alphalean Limited | Lytham St Annes | 2012 |
| Alphalink Legal Services Ltd | Dartford | 2020 |
| Alphallm Ltd | London | 2025 |
| Alphamarine Photography Limited | Manchester | 2017 |
| Alphamax Digital Services Limited | Luton | 2024 |
| Alphamediahub Ltd | London | 2026 |
| Alphametrics Ltd | St. Ives | 1983 |
| Alphamise Ltd | Hamilton | 2021 |
| Alphamode Studio Ltd | London | 2016 |
| Alphamotion Limited | Preston | 2012 |
| Alphamsp Ltd | Chatteris | 2022 |
| Alphan Tech Solutions Ltd | Chatham | 2023 |
| Alphanano Limited | Dagenham | 2023 |
| Alphanet Media Limited | Brighton | 2002 |
| Alphanetz Ltd | Bedford | 2015 |
| Alphanova Ltd | Bristol | 2010 |