| Albion MOT and Service Centre Ltd. | Hospitality | 2012 |
| Albion Smart Apparel Limited | Wholesale & retail | 2024 |
| Albion Stone Masonry Limited | Wholesale & retail | 1927 |
| Albion Street (Derby) Limited | Construction | 2022 |
| Albion TCG Ltd | Wholesale & retail | 2026 |
| Albion VIA Education Ltd | Education | 2022 |
| Albion Wharf Management Limited | Real estate | 1989 |
| Albionmont Limited | Real estate | 2015 |
| Albionx Ltd | Wholesale & retail | 2025 |
| ALBOK224INTERNATIONAL Limited | Hospitality | 2019 |
| Albon Solutions Limited | Information & communication | 2022 |
| Alboran Software Limited | Information & communication | 2007 |
| Albosat Alzahabe for Investment Limited | Wholesale & retail | 2025 |
| Albraa for Export Ltd | Wholesale & retail | 2026 |
| Alburn Renovations Limited | Construction | 2022 |
| Albus Medical Services Ltd | Health & social care | 2016 |
| ALC Homes Ltd | Real estate | 2023 |
| ALC Projects Ltd | Construction | 2013 |
| Alcatraz Limited | Other services | 2021 |
| Alcazaba Ltd | Professional & scientific | 2023 |
| Alchem Healthcare Ltd | Wholesale & retail | 1999 |
| Alchemicity Limited | Wholesale & retail | 2025 |
| Alchemist Investment Properties Ltd | Real estate | 2018 |
| Alchemist Labs Limited | Information & communication | 2019 |
| Alchemy Advisory Limited | Professional & scientific | 2025 |
| Alchemy Arts Limited | Arts & recreation | 2012 |
| Alchemy Coaching and Training Ltd | Education | 2023 |
| Alchemy Communications Ltd | Professional & scientific | 2024 |
| Alchemy of the Earth Ltd | Wholesale & retail | 2025 |
| Alchemy Portfolio Limited | Health & social care | 2016 |
| Alcione Limited | Administrative & support | 2021 |
| Alco Capital Holdings Limited | Financial services | 2026 |
| Alco Capital Limited | Financial services | 2026 |
| Alco Support Services Ltd | Professional & scientific | 2023 |
| Alcoa Aluminum Ltd | Extraterritorial | 2019 |
| Alcobonds Investment Limited | Real estate | 2025 |
| Alcombe Limited | Real estate | 1981 |
| Alcor Enterprise Ltd | Wholesale & retail | 2024 |
| Alcp Holdings Ltd | Financial services | 2024 |
| Alcurt Textiles Limited | Manufacturing | 2013 |
| ALD Hospitality Limited | Information & communication | 2023 |
| Aldar Community Centre | Other services | 2018 |
| Aldar I Limited | Manufacturing | 2025 |
| Aldar Ventures Ltd | Real estate | 2023 |
| Aldarragi Ltd | Health & social care | 2017 |
| Aldav LLP | | 2013 |
| Aldec Decorators Ltd | Construction | 2009 |
| Aldeek Superstore Ltd | Wholesale & retail | 2016 |
| Alden & Benjamin Ltd | Wholesale & retail | 2019 |
| Alder Forest House Ltd | Real estate | 2018 |
| Alder House Cat Hotel Ltd | Hospitality | 2010 |
| Alder Point Consulting Firm Ltd | Extraterritorial | 2026 |
| Alderelm Limited | Manufacturing | 1982 |
| Aldergrove Investments Ltd | Professional & scientific | 1996 |
| Alderhawk Limited | Real estate | 2010 |
| Alderley 1 GB Limited | Construction | 2016 |
| Alderley Asset Management Limited | Financial services | 1997 |
| Alderley Edge Investments (Holdings) Unlimited | Financial services | 2021 |
| Alderley Edge Medical Reports Limited | Health & social care | 2021 |
| Alderley Historic Quarter Estate Management Company Limited | Households | 2018 |
| Alderley Historic Quarter Residents Management Company Limited | Households | 2017 |
| Alderley Imaging Limited | Professional & scientific | 2015 |
| Alderley Lodge Management Company Limited | Households | 2006 |
| Alderley Park Holdings Limited | Real estate | 2014 |
| Alderley Park Limited | Real estate | 2013 |
| Alderley PLC | Professional & scientific | 1989 |
| Alderley Polymers Limited | Wholesale & retail | 2014 |
| Alderley Urban Investments II Limited | Real estate | 2026 |
| Alderley Wealth Management Ltd | Financial services | 2009 |
| Alderney Learning and Development Ltd | Extraterritorial | 2015 |
| Alderpoint Consultants Limited | Administrative & support | 2017 |
| Alders Academy Ltd | Education | 2022 |
| Aldersbrook Launderettes Limited | Real estate | 1966 |
| Alderson Assets Ltd | Real estate | 2025 |
| Alderwood Tree Care Ltd | Administrative & support | 2022 |
| Aldeyar Almasreya Company Ltd | Wholesale & retail | 2025 |
| Aldgate International Limited | Other services | 2023 |
| Aldhoor International for Investment Co Ltd | Wholesale & retail | 2025 |
| Aldo Fusari Shoe Trading Limited | Wholesale & retail | 2025 |
| Aldo Mark Services Limited | Financial services | 2018 |
| Aldoha Ltd. | Real estate | 2025 |
| Aldpic Limited | Hospitality | 2015 |
| Aldrange Limited | | 1985 |
| Aldred Properties Ltd | Real estate | 2025 |
| Aldred Timber Limited | Wholesale & retail | 2014 |
| Aldrens Limited | Real estate | 1998 |
| Aldrex Limited | Professional & scientific | 1953 |
| Aldridge Consulting Services Limited | Professional & scientific | 2019 |
| Aldron Holdings Limited | Financial services | 2019 |
| Aldron Property Investments Limited | Real estate | 2024 |
| Aldwinians Trading Company Limited | Hospitality | 2019 |
| Aldwych (Manchester) Limited | Real estate | 2016 |
| Aldwych Group Limited | Administrative & support | 2005 |
| Aldwych Homes Limited | Real estate | 1996 |
| ALE & Aloo Ltd | Hospitality | 2023 |
| ALE & ALOO2 Ltd | Hospitality | 2025 |
| ALE Estate Ltd | Real estate | 2019 |
| Alebtethamat for General Trading Ltd | Wholesale & retail | 2025 |
| Alec & Will Property Solutions Ltd | Real estate | 2025 |
| Alec Sharples Farm Supplies and Transport Limited | Transport & logistics | 1987 |