| AL13 Group Holdings Limited | Cardiff | 2024 |
| AL13 Holdings Limited | Cardiff | 2020 |
| ALA London Holdings Limited | London | 2025 |
| ALA Property Partners Limited | Newtownards | 2025 |
| Alabama Ventures Limited | London | 2018 |
| Alabaster Box Investment Ltd | Hertfordshire | 2020 |
| Alabbadi Investment Holding Group Ltd | London | 2023 |
| Alabro Ltd | Carshalton | 2025 |
| Alac Holdco Limited | Leigh-On-Sea | 2026 |
| Alacrity DB Limited | Stratford-Upon-Avon | 2014 |
| Alaia Holdings Limited | Alsager Road Winterley | 2013 |
| Alaib Limited | Malton | 2009 |
| Alakazam Holdings Bidco Limited | London | 2024 |
| Alakazam Holdings Midco Limited | London | 2024 |
| Alal Ltd | London | 2025 |
| ALAL1 Limited | Newcastle Upon Tyne | 2017 |
| Alalava Investments Ltd | Benfleet | 2018 |
| Alam FS Ltd | Portsmouth | 2026 |
| Alam Holdings Limited | Glasgow | 2017 |
| Alam Medical Holdings Ltd | Gatwick | 2026 |
| Alamadiyaf Al-Masiyyah for Trading Company Ltd | London | 2024 |
| Alamberly Limited | Norwich | 2015 |
| Alameda Developments Ltd | London | 2023 |
| Alamo AL Ltd | London | 2024 |
| Alamo Holdings Limited | Horncastle | 2021 |
| Alamo Invest Limited | Shrewsbury | 2019 |
| Alamo Mortgage Holdings Ltd | London | 2021 |
| Alamont Holdings Ltd | Cannington | 2020 |
| Alams International Ltd | Harrow | 2019 |
| Alamut Investment Management (UK) Ltd | London | 2024 |
| Alan & Thomas Insurance Brokers Limited | London | 2002 |
| Alan Blunden & Co. Ltd | London | 1997 |
| Alan Boswell & Company Limited | Norwich | 2002 |
| Alan Boswell Assets Ltd | Norwich | 2024 |
| Alan Boswell Employee Benefits Ltd | Norwich | 2011 |
| Alan Boswell Financial Planners Ltd | Norwich | 2024 |
| Alan Boswell Holdings Limited | Norwich | 2023 |
| Alan Boswell Insurance Brokers Limited | Norwich | 1991 |
| Alan Broadwell Ltd | Otley | 2014 |
| Alan Brown & Co (NI) Ltd | Craigavon | 2012 |
| Alan Cook Financial Services Ltd | Norwich | 2010 |
| Alan Day Consultancy Limited | Warlingham | 2014 |
| Alan Dennett Financial Services Limited | North Shields | 2012 |
| Alan Dickinson Consultancy Limited | London | 2013 |
| Alan Donald & Company Ltd | Tring | 2014 |
| Alan Dring Ltd | Pickering | 2019 |
| Alan Dunn Financial Management Limited | Dundee | 2025 |
| Alan Hill Financial Planning Limited | Colchester | 2013 |
| Alan Hollingsworth Financial Solutions Ltd | Stockton-On-Tees | 2020 |
| Alan James Limited | Guildford | 1961 |
| Alan Johnston Partnership Holdings Limited | Liverpool | 2024 |
| Alan Knott Enterprises Limited | Canterbury | 1973 |
| Alan Knox Holdings Limited | Glenrothes | 2024 |
| Alan LEE Accountancy Services Ltd | Dinton | 1996 |
| Alan M. Milne Ltd | Brighton | 2019 |
| Alan Oaten Trading Ltd | Wellington | 2023 |
| Alan Parker Consortium Ltd | Gerard Cross | 2022 |
| Alan Parker Estates Ltd | Harrow | 2018 |
| Alan Pickin Associates Ltd | Sunderland | 2013 |
| Alan R. Mackay & Company Limited | 38 Miller Road, Ayr | 1988 |
| Alan Rashleigh and Associates Limited | Stockport | 2003 |
| Alan Reid Financial Services (NI) Limited | Hillsborough | 2004 |
| Alan Renwick Wealth Management Limited | Beverley | 2014 |
| Alan Rhone Holdings Limited | Wrexham | 2016 |
| Alan Robinson (Sussex) Limited | Haywards Heath | 2014 |
| Alan Ryan Financial Services Ltd | Oldham | 2015 |
| Alan Seward Limited | Bristol | 2011 |
| Alan Seward Services Limited | Bristol | 2003 |
| Alan Sheeran Mortgages and Protection Limited | Manchester | 2024 |
| Alan Small Financial Services Limited | Stanley | 2015 |
| Alan Stables Ltd | Aberdeen | 2021 |
| Alan Steel (Asset Management) Limited | Linlithgow | 1975 |
| Alan TCX Limited | London | 2026 |
| Alan Tunstall Holdings Ltd | St. Helens | 2016 |
| Alan Watson Ltd | Edinburgh | 2014 |
| Alan Wood Holdings Limited | Hull | 2015 |
| Alan Woodley Holdings Limited | London | 2021 |
| Alan Young Engineering Holdings Limited | Dumfries | 2020 |
| Alan. C. Murray Financial Information Limited | Ormskirk | 2003 |
| Alanah Holding Ltd | Coventry | 2025 |
| Aland Investments Ltd | London | 2025 |
| Alanda Capital Management Limited | London | 2016 |
| Alanda I Limited | London | 2018 |
| Alanda II Ltd | London | 2020 |
| Alanda III Limited | London | 2020 |
| Alanda IV Limited | London | 2020 |
| Alanda IX Limited | London | 2025 |
| Alanda Limited | Billericay | 2009 |
| Alanda SIX Limited | London | 2020 |
| Alanda V Limited | London | 2020 |
| Alanda VII Limited | London | 2020 |
| Alanda Viii Limited | London | 2025 |
| Alandale Securities Limited | London | 1988 |
| Alandi Limited | Rotherham | 2018 |
| Alanduin Ltd | London | 2016 |
| Alani Holdings Ltd | Sutton Coldfield | 2026 |
| Alanma Investments Ltd | London | 2017 |
| Alanna Scott Delaney Ltd | London | 2022 |
| Alannah Investments Limited | Liverpool | 2019 |
| Alantra Corporate Portfolio Advisors International Limited | London | 2018 |