| Almaflow Ltd | London | 2025 |
| Almagell Limited | Salford | 2015 |
| Almand Consulting Limited | Bournemouth | 2001 |
| Almanzel Limited | London | 2009 |
| Almarine Seafire & Meteor Ltd | Poole | 2022 |
| Almarr Seafoods Limited | East Yorkshire | 1992 |
| Almco Demining Limited | London | 2009 |
| Almeida Beauty Limited | London | 2023 |
| Almerc Ltd | London | 2025 |
| Almeria International Limited | London | 2023 |
| Almero Bristol Ltd | London | 2013 |
| Almery 1954 Limited | Carlisle | 2013 |
| Almira Catering Ltd | Ipswich | 2024 |
| Almis Designs Limited | | 1995 |
| Almners Road 1961 Limited | Ashford | 2014 |
| Almond 1965 Limited | Dartford | 2015 |
| Almond Capital Limited | Brighton | 2012 |
| Almondbury Garage Limited | Bradford | 1965 |
| Almost Famous Limited | Rotherham | 2002 |
| Almost Saints Ltd | King'S Lynn | 2019 |
| Almsco Limited | Bridgend | 2008 |
| Almtex Limited | Bolton | 2014 |
| Alnafay Retailers Limited | London | 2021 |
| Alnmouth Drive 1971 Limited | Redcar | 2014 |
| Alnor Finance Limited | Slaithwaite | 1965 |
| Alnor Funds Company Limited | Slaithwaite | 1955 |
| Alnor Supply Company Limited | Slaithwaite | 1968 |
| Alnwick Healthcare Ltd | Whitley Bay | 2023 |
| ALO Group Limited | London | 2025 |
| Aloadofjunk.Com Ltd | Telford | 2018 |
| Aloaten Ltd. | Soham | 2016 |
| Aloe (Liincolnshire) Limited | Grimsby | 2025 |
| Aloft Photography Limited | Poole | 2017 |
| Aloft Scaffolding Limited | Poole | 2017 |
| Alogfireuk Limited | Skelmersdale | 2025 |
| Aloha Skies Ltd | London | 2020 |
| Alom Network Ltd | Walsall | 2024 |
| Alot International Group Co., Ltd | Cambridge | 2014 |
| ALP LAP Limited | London | 2021 |
| Alpaca Construction Ltd | Camborne | 2022 |
| Alpaca Pals Ltd | Dorchester | 2011 |
| Alpc Health and Care Consultancy Ltd | Seaton | 2024 |
| Alperton Investments Limited | Suffolk | 2006 |
| Alpesh Patel Ltd | Chertsey | 2025 |
| Alpfjord & Vesterlund Invest Limited | London | 2023 |
| Alpfjord & Vesterlund Limited | London | 2023 |
| Alpha 360 Ltd | Rainham | 2026 |
| Alpha A2Z Local Limited | Ilkley | 2024 |
| Alpha Aero Management Ltd | London | 2016 |
| Alpha and Omega Energy Ltd | Great Yarmouth | 2024 |
| Alpha Automotive Associates Limited | Barnet | 2008 |
| Alpha Bank Limited | London | 2007 |
| Alpha Bank London Nominees Limited | London | 1936 |
| Alpha Birmingham | Gateshead | 1963 |
| Alpha Bravo Properties Limited | Stevenage | 2021 |
| Alpha CAP Advisers Limited | London | 2020 |
| Alpha Capital (UK) Ltd | London | 2020 |
| Alpha Chemical Industry Limited | Cambridge | 2018 |
| Alpha Crew Ltd | Enfield | 2012 |
| Alpha Data Solutions Limited | London | 2022 |
| Alpha Developments Limited | Malvern | 2011 |
| Alpha Empire Ltd | Blackburn | 2024 |
| Alpha Energy Trading GB Ltd | Perth | 2011 |
| Alpha Enuk Co., Ltd | London | 2012 |
| Alpha Foods & Services Limited | Stoke-On-Trent | 2026 |
| Alpha for Investment & Trading Ltd | Manchester | 2026 |
| Alpha for Investment Limited | Manchester | 2026 |
| Alpha for Trading & Services Limited | Manchester | 2026 |
| Alpha Haulage Limited | Tenbury Wells | 2011 |
| Alpha Health Limited | Taunton | 2006 |
| Alpha House Freehold Limited | London | 2015 |
| Alpha House Property Limited | London | 2016 |
| Alpha Inspired Ltd | Luton | 2023 |
| Alpha Integrated Management Systems Ltd | Doncaster | 2024 |
| Alpha Investments UK DP Ltd | London | 2022 |
| Alpha Jumper Limited | Bexley | 2019 |
| Alpha Marine Co., Ltd | London | 2015 |
| Alpha Neuron Ltd | Manchester | 2025 |
| Alpha Omega Consultants Limited | London | 2001 |
| Alpha Omega Management Limited | Southwick | 2001 |
| Alpha Plan Properties Limited | London | 2020 |
| Alpha Portfolio Management Ltd | Bristol | 2017 |
| Alpha Resources (UK) Limited | Southampton | 2012 |
| Alpha Sparkle Cleaners Ltd | Ruislip, | 2024 |
| Alpha Support Services Limited | Kettering | 2023 |
| Alpha Tax Office Ltd | Harrow | 2025 |
| Alpha Technical Ltd | Mexborough | 2009 |
| Alpha Technology Services Consulting Limited | London | 2014 |
| Alpha Tees Ltd | Musselburgh | 2015 |
| Alpha Z Ltd | Hanwell | 2016 |
| Alpha-Agro (International) Ltd | Godalming | 2001 |
| Alpha-Rich Limited | London | 2016 |
| ALPHA1CORP International Limited | London | 2005 |
| ALPHA4U Ltd | Harrow | 2020 |
| Alphaa Healthcare Ltd | Mildenhall | 2023 |
| Alphabet Childcare Ltd | Bristol | 2013 |
| Alphabet Holdings Ltd | Manchester | 2015 |
| Alphabetmedium Ltd | Cambridge | 2014 |
| Alphabrand Ltd | Rustington | 2016 |
| Alphacom Systems and Solutions Limited | London | 2023 |