| Aldermans Place Management Company Limited | Construction | 2014 |
| Alderstone Finance Ltd | Professional & scientific | 2026 |
| Aldgate Hotel Bidco Limited | Hospitality | 2021 |
| Aldgate Hotel Opco Limited | Hospitality | 2014 |
| Aldin Investments Limited | Construction | 2017 |
| Aldin’S Collection Ltd | Health & social care | 2019 |
| Aldoaa Ltd | Health & social care | 2023 |
| Aldomet Ltd | Real estate | 2024 |
| Aldridge Centre Investments Limited | Real estate | 2024 |
| Aldridge E.D Services Ltd | Professional & scientific | 2025 |
| Aldridge Holdings Limited | Manufacturing | 1991 |
| Aldridge Motor Company (Bournville) Limited | Wholesale & retail | 2025 |
| Aldridge Sand & Gravel Ltd | Financial services | 2019 |
| Aldridge Security Limited | Wholesale & retail | 1965 |
| Aldridge Supply & Finance Limited | Financial services | 2004 |
| ALE Aesthetics Ltd | Health & social care | 2021 |
| ALE Mecca Ltd | Hospitality | 2023 |
| Aleancloud Ltd | Information & communication | 2025 |
| Aleanda UK Ltd | Wholesale & retail | 2025 |
| Alecta RE Group Ltd | Wholesale & retail | 2025 |
| Aleef Services Group Ltd | Real estate | 2026 |
| Aleem Meat & Co Ltd | Wholesale & retail | 2024 |
| Aleen (Halesowen) Ltd | Wholesale & retail | 2025 |
| Aleena Courier Ltd | Transport & logistics | 2025 |
| Aleenastic Ltd | Wholesale & retail | 2025 |
| Aleena’S Cakes Ltd | Manufacturing | 2023 |
| Aleesa Family Ltd | Hospitality | 2024 |
| Aleet Ltd | Health & social care | 2023 |
| Aleeya Ltd | Wholesale & retail | 2025 |
| ALEJANDRAMT7 Ltd | Professional & scientific | 2024 |
| Alel Ltd | Wholesale & retail | 2019 |
| Alelz Company Limited | Transport & logistics | 2023 |
| Alemao Limited | Wholesale & retail | 2016 |
| Alenka Russian Shop Limited | Wholesale & retail | 2025 |
| Aler Limited | Wholesale & retail | 2023 |
| Aleramedica Healthcare Limited | Administrative & support | 2025 |
| Alert Security Limited | Administrative & support | 2023 |
| Alessandro SOL Limited | Real estate | 2023 |
| Alessandro Totoro Ltd | Professional & scientific | 2020 |
| Alessia&Antonia Ltd | Transport & logistics | 2024 |
| Alesto Pound Shop Limited | Wholesale & retail | 2024 |
| Aletaha Academy Ltd | Education | 2020 |
| Aletheia Academy Ltd | Health & social care | 2011 |
| Alets Ltd | Real estate | 2018 |
| Alevio Consulting Limited | Administrative & support | 2020 |
| Alevio Group Ltd | Financial services | 2022 |
| Alex and Albert Ltd | Wholesale & retail | 2018 |
| Alex Ashworth Financial Solutions Limited | Financial services | 2023 |
| Alex BEE Honey Limited | Wholesale & retail | 2019 |
| Alex Car Boot Ltd | Wholesale & retail | 2022 |
| Alex Cheung Family Ltd | Real estate | 2021 |
| Alex CUT Ltd | Other services | 2025 |
| Alex Dima Ltd | Transport & logistics | 2017 |
| Alex Express Ltd | Transport & logistics | 2013 |
| Alex Gabinet Holdings Ltd | Real estate | 2022 |
| Alex Gabinet Ltd | Real estate | 2018 |
| Alex George Ltd | Transport & logistics | 2019 |
| Alex Leon Fitness Ltd | Education | 2021 |
| Alex Mihai Transport Ltd | Transport & logistics | 2026 |
| Alex Roddie Haulage Company Ltd | Transport & logistics | 2016 |
| Alex Smith Limited | Real estate | 2003 |
| Alex the Big Limited | Construction | 2020 |
| Alex Watson Animation Ltd | Arts & recreation | 2017 |
| Alex-Cristina Transport Ltd | Transport & logistics | 2024 |
| ALEX69 Ltd | Transport & logistics | 2016 |
| Alexa Beauty Studio Ltd | Other services | 2020 |
| Alexa Healthcare Limited | Administrative & support | 2018 |
| Alexaautomotive Ltd | Transport & logistics | 2025 |
| Alexander ( United) Ltd | Hospitality | 2026 |
| Alexander (Midlands) Developments Ltd | Administrative & support | 2021 |
| Alexander (Midlands) Holdings Ltd | Real estate | 2021 |
| Alexander Buildings Ltd | Construction | 2018 |
| Alexander Daniels Energy Limited | Administrative & support | 2018 |
| Alexander Daniels Global Limited | Administrative & support | 2015 |
| Alexander Daniels Limited | Administrative & support | 2009 |
| Alexander Group (UK) Ltd | Hospitality | 2008 |
| Alexander Growth Capital Limited | Energy | 2015 |
| Alexander Informatics Ltd | Administrative & support | 2025 |
| Alexander James Property Group Ltd | Households | 2023 |
| Alexander James Watch Services Ltd | Other services | 2020 |
| Alexander Knight Partnership Limited | Professional & scientific | 2012 |
| Alexander Mann Construction Limited | Wholesale & retail | 2010 |
| Alexander Pathways Limited | Education | 2026 |
| Alexander PHI Ltd | Information & communication | 2025 |
| Alexander Stewart Associates Limited | Administrative & support | 2006 |
| Alexander Thornton Resources Limited | Administrative & support | 2010 |
| Alexander Trasporte UK Ltd | Transport & logistics | 2015 |
| Alexandra Gardens Management Company Limited | Households | 1998 |
| Alexandra Grace Properties Limited | Real estate | 2023 |
| Alexandra Rose Construction Ltd | Construction | 2022 |
| Alexandria Egypt Ltd | Wholesale & retail | 2023 |
| Alexandroaia Limited | Wholesale & retail | 2025 |
| Alexara (FIC 2025) Ltd | Financial services | 2025 |
| Alexara Limited | Wholesale & retail | 2009 |
| Alexbrico Limited | Construction | 2025 |
| Alexgibi Ltd | Transport & logistics | 2025 |
| Alexia Alexandra Ltd | Transport & logistics | 2019 |
| Alexios Estates Ltd | Real estate | 2026 |
| Alexios Ltd | Wholesale & retail | 2015 |
| Alexlightpro Lighting Ltd | Professional & scientific | 2013 |