| Alpha Wave Analytics Limited | Glasgow | 2024 |
| Alpha Web Creators Ltd | Hounslow | 2025 |
| Alpha's Consulting Ltd | London | 2023 |
| Alpha-Echo Three-Five Limited | Surrey | 2006 |
| Alpha-Helix Consulting Services Limited | London | 2011 |
| Alpha-Networks.Net Limited | Braintree | 2003 |
| Alpha-One Consulting Limited | London | 2000 |
| Alpha-Tek Associates Limited | Coventry | 1989 |
| Alpha.Omega.Morph. Ltd | London | 2022 |
| ALPHA10X Europe Ltd | London | 2024 |
| ALPHA1POINT Limited | Shepperton | 2014 |
| ALPHA2 Solutions & Software Limited | London | 2023 |
| ALPHA44 Ltd | London | 2025 |
| ALPHA52 Ltd | London | 2026 |
| Alphaai Solutions Ltd | Leigh | 2024 |
| Alphaanalytics Limited | London | 2009 |
| Alphababa Ltd | Derby | 2022 |
| Alphabet Avenue Ltd. | Stratford-Upon-Avon | 2000 |
| Alphabet Copywriting Limited | Lewisham | 2006 |
| Alphabet Films Limited | Ilford | 2022 |
| Alphabet IT Ltd | London | 2026 |
| Alphabet Moon Publishing Limited | Bristol | 2022 |
| Alphabet Music Ltd | Totnes | 2025 |
| Alphabet Publishing Limited | Hove | 1996 |
| Alphabet School Books Limited | Glossop | 2013 |
| Alphabet Select Ltd | London | 2023 |
| Alphabet Soup Limited | Belper | 2011 |
| Alphabet Sports Limited | Henfield | 2011 |
| Alphabet Zero Agency Ltd | London | 2025 |
| Alphabeta Facilities Limited | London | 2014 |
| Alphabetty Books Ltd | Peacehaven | 2022 |
| Alphabite Ltd | Scunthorpe | 2022 |
| Alphablend Limited | | 2006 |
| Alphablit Limited | Hove | 2016 |
| Alphablocks Limited | Wokingham | 2010 |
| Alphabook Group Limited | Beaconsfield | 2017 |
| Alphabooks Limited | London | 1979 |
| Alphabotics Limited | | 2008 |
| Alphabridge Smartops Ltd | London | 2025 |
| Alphabright Solutions Ltd | Reading | 2024 |
| Alphabronx Limited | Banbury | 2008 |
| Alphabyte IT Limited | Cardiff | 2009 |
| Alphabytes Limited | London | 2020 |
| Alphacap Labs Limited | London | 2026 |
| Alphacentrix Ltd | Pinner | 2026 |
| Alphacert Labs UK Limited | London | 2019 |
| Alphachain Capital Ltd | Croydon | 2017 |
| Alphaclic Ltd | London | 2020 |
| Alphaclock Limited | Daventry | 1999 |
| Alphaclub Business Solutions Ltd | Leighton Buzzard | 2011 |
| Alphacoder Limited | Chepstow | 2025 |
| Alphacom Business Systems Limited | London | 1985 |
| Alphacom Limited | Lincoln | 2022 |
| Alphacom Modelling Ltd | Swansea | 2000 |
| Alphacomm Systems Ltd | Glasgow | 2018 |
| Alphacore Consulting Limited | Harrow | 2010 |
| Alphacraft Limited | Haywards Heath | 2020 |
| Alphacrypt Security Ltd | Wolverhampton | 2024 |
| Alphacurve Ltd | Burnham-On-Crouch | 2022 |
| Alphadataanalytics Limited | Solihull | 2024 |
| Alphadatapapa Ltd | Peterborough | 2019 |
| Alphadech Summit Crystal Executive Ltd | London | 2013 |
| Alphadevs Ltd | London | 2024 |
| Alphadigital Limited | Rayleigh | 2017 |
| Alphados Group Limited | Basingstoke | 2020 |
| Alphadroid Ltd | London | 2022 |
| Alphaes Limited | Brighton | 2024 |
| Alphaeus Carol Limited | London | 2010 |
| Alphaex Digital Vault UK Ltd | London | 2024 |
| Alphaeye Limited | London | 2024 |
| Alphafed Ltd | Whitehills Business Park | 2019 |
| Alphafeops Ltd | Ashford | 2026 |
| Alphafinch Limited | Milton Keynes | 2010 |
| Alphafirst Limited | Hertfordshire | 2000 |
| Alphafox Ltd | King'S Lynn | 2018 |
| Alphaframe AI Ltd | Luton | 2025 |
| Alphafuturis Ltd | London | 2024 |
| Alphagalileo Limited | London | 2013 |
| Alphagate AI Limited | Ipswich | 2026 |
| Alphageek Ltd | Manchester | 2025 |
| Alphagen Codes Ltd | London | 2025 |
| Alphagen Holdings Limited | London | 2026 |
| Alphago Consulting Limited | Waterlooville | 2022 |
| Alphagraphic Systems Limited | Loughton | 1987 |
| Alphagreen Group Limited | Barnet | 2019 |
| Alphagrep UK Limited | Weybridge | 2016 |
| Alphagrid Analytics Ltd | London | 2025 |
| Alphagrid Technology Services Ltd. | Harrow | 2018 |
| Alphahive Ltd | London | 2025 |
| Alphaimmersia Ltd | Pinner | 2024 |
| Alphakdb Ltd | London | 2025 |
| Alphakey Group Limited | Cardiff | 2020 |
| Alphalake Technologies Ltd | London | 2019 |
| Alphaland Entertainment Ltd. | London | 2012 |
| Alphalead Solutions Ltd | Manchester | 2025 |
| Alphalithe Ltd | Bolton | 2019 |
| Alphalogic Computers Limited | Blackham | 1993 |
| Alphalogix Ltd | Bolton | 1998 |
| Alphalojix Limited | London | 2015 |
| Alphaloop AI Ltd | Canary Wharf | 2024 |