| Alphanumeric Accountants Limited | London | 2005 |
| Alphanumeric Consulting Limited | Hertford | 2017 |
| Alphanumeric Services Limited | London | 2023 |
| Alphanumo Ltd | Batley | 2022 |
| Alphaomegacommunications Ltd | London | 2026 |
| Alphaora Ltd | St. Albans | 2025 |
| Alphap Planning and Engineering Projects UK Limited | Preston | 2025 |
| Alphapapagolf FM Services Ltd | Cardiff | 2019 |
| Alphaplas International Limited | Preston | 2001 |
| Alphaplus (Training and Translations) Limited | Taunton | 1993 |
| Alpharedakt Ltd | London | 2021 |
| Alpharhou Ltd | Cambridge | 2026 |
| Alpharhythm Limited | Lichfield | 2010 |
| Alpharmaxim Limited | Altrincham | 2001 |
| Alpharo Research Limited | London | 2023 |
| Alphascript Limited | Cardiff | 2000 |
| Alphasearch (UK) Limited | Middlesbrough | 2002 |
| Alphaseven Omni-Solutions (UK) Limited | Middlesex | 2019 |
| Alphashield Limited | London | 2010 |
| Alphashire Ltd | London | 2017 |
| Alphasite Limited | Driffield | 2006 |
| Alphaskill Limited | Edgware | 2018 |
| Alphaspec Limited | Rochford | 2014 |
| Alphastarke Limited | London | 2026 |
| Alphat Consulting Limited | Swansea | 2016 |
| Alphatax Ltd | Birmingham | 2026 |
| Alphatec Marketing Limited | Dunstable | 2024 |
| Alphatech CAD CAM Services Limited | Newton Abbot | 2003 |
| Alphatech Energy Limited | Chatham | 2014 |
| Alphatech Engineering Products Limited | Kenilworth | 1994 |
| Alphateck Engineering and Services Ltd | Bedford | 2025 |
| Alphatek Hyperformance Coatings Ltd. | Ramsbottom Bury | 1993 |
| Alphatek Marketing Solutions Ltd | Chelmsford | 2016 |
| Alphatrack Systems Limited | Hedge End | 1993 |
| Alphavectors Biotech Limited | London | 2025 |
| Alphaville Consulting Limited | Sittingbourne | 2023 |
| Alphawhale Limited | Aberdeen | 2014 |
| Alphaworlde Limited | Ilford | 2002 |
| Alphaxa Limited | London | 2002 |
| Alphaxy Ltd | London | 2025 |
| Alphazed Ltd | London | 2021 |
| Alphazulu Advocates Ltd | West Drayton | 2018 |
| Alphega Design & Construction Management Limited | Norwich | 2003 |
| Alphen Design Ltd | Brighton | 2025 |
| Alphen Limited | Bourne | 2015 |
| Alpheus Capital Limited | London | 2005 |
| Alpheus Management Services Limited | Whitehills Business Park | 2016 |
| Alphin Consulting Limited | Oldham | 2018 |
| Alphin Ltd | Mansfield | 2014 |
| Alphin Technologies Limited | Stockport | 2018 |
| Alphine Consultants Limited | Newport | 2016 |
| Alphom Ltd | Tadley | 2013 |
| Alphomega Limited | London | 2012 |
| Alphonsus & Co Limited | Harrow | 1996 |
| Alphubel Ltd | Saffron Walden | 2020 |
| Alphyra Audio Visual Limited | Hull | 2016 |
| Alpi Acct Limited | Romford | 2018 |
| Alpi Limited | Amersham | 2001 |
| ALPIC22 Ltd | Hassocks | 2022 |
| Alpiglen Ltd | London | 2018 |
| Alpign Services Limited | Norfolk | 2006 |
| Alpiko Yachting Ltd | Mildenhall | 2026 |
| Alpin Recruitment Limited | Whitefield | 2014 |
| Alpina Property Consultancy Limited | Bristol | 2013 |
| Alpina Systems Limited | Brighton | 1994 |
| Alpina Technical Services Limited | London | 1991 |
| Alpine Accountancy Manchester Limited | Stockport | 2017 |
| Alpine Accountancy Services Ltd | Danbury | 1998 |
| Alpine Accountants Ltd | Blackburn | 2016 |
| Alpine Accounting Ltd | Batley | 2020 |
| Alpine Actuarial Consulting Ltd | Tunbridge Wells | 2026 |
| Alpine Advantage Limited | Sutton | 2009 |
| Alpine Associates Limited | Aldermaston | 2016 |
| Alpine Bidco Limited | Bury | 2018 |
| Alpine Blue Ltd | Halifax | 2015 |
| Alpine Building Developments Limited | Southampton | 2013 |
| Alpine Business Management Limited | Penrith | 2012 |
| Alpine Capital Advisors Limited | London | 2022 |
| Alpine Capital Consultants Ltd | Richmond | 2020 |
| Alpine Consultancy Ltd | Manchester | 2026 |
| Alpine Corporate Ltd | London | 2026 |
| Alpine Crew Ltd | London | 2018 |
| Alpine Design Limited | Maidstone | 2017 |
| Alpine Digital Consultancy Ltd | Glasgow | 2019 |
| Alpine Digital Media Consulting Limited | London | 2018 |
| Alpine Eagle Defence Ltd. | Altrincham | 2025 |
| Alpine Edge Design Limited | Faversham | 2024 |
| Alpine EHS Consultancy Ltd. | Lanark | 2011 |
| Alpine Engineering Limited | Wrexham | 2003 |
| Alpine Exposures Limited | | 2007 |
| Alpine Fabrication Limited | Bramhall | 2020 |
| Alpine Foundry Ltd | London | 2021 |
| Alpine Glacier Project Limited | Bromley | 2017 |
| Alpine Group (Scotland) Limited | Edinburgh | 2006 |
| Alpine Imports Ltd | Edinburgh | 2017 |
| Alpine Irrigation and Drilling Ltd | Yateley | 2025 |
| Alpine Law Limited | Orpington | 2016 |
| Alpine Lift Services Ltd | Grays | 2020 |
| Alpine Marketing Studios Limited | London | 2016 |
| Alpine Markets Ltd | Steyning | 2023 |