| Albellco Properties Limited | Financial services | 2023 |
| Albert Mill Antiques Limited | Real estate | 2013 |
| Albertcookie Limited | Wholesale & retail | 2023 |
| Albertos Wigan Ltd | Hospitality | 2020 |
| Alberts Healthcare Services Limited | Health & social care | 2018 |
| Albion Commerce Ltd | Wholesale & retail | 2025 |
| Albion Cooked Meats Limited | Wholesale & retail | 2000 |
| Albion Holdings (Bolton) Limited | Real estate | 2025 |
| ALC Psychology Services Limited | Health & social care | 2015 |
| Alchemy Sports Nutrition Ltd | Wholesale & retail | 2024 |
| Alchemy Surface Design Academy Limited | Education | 2024 |
| Alco Roofing Limited | Construction | 2015 |
| Alcrest Ltd | Real estate | 2005 |
| Aldbury Goods Limited | Wholesale & retail | 2024 |
| Aldcroft Adhesives Limited | Manufacturing | 1983 |
| Aldcroft Ventures Ltd | Financial services | 2026 |
| Aldcrofts Limited | Extraterritorial | 2013 |
| Aldenbrook RTM Company Ltd | Households | 2023 |
| Alder Grove School Ltd | Education | 2026 |
| Alder HEY Road Ltd | Construction | 2021 |
| Alder Holdings(Nw) Limited | Arts & recreation | 2025 |
| Alder House Kearsley Ltd | Real estate | 2020 |
| Alderton Enterprises Ltd | Wholesale & retail | 2023 |
| Alderwood Gardens Residents Management Company Limited | Households | 2023 |
| Aldred Property Management Ltd | Real estate | 2011 |
| ALE Foods Limited | Hospitality | 2024 |
| Alec's 3PIECE Suites Limited | Wholesale & retail | 2001 |
| Aleena Foods Ltd | Wholesale & retail | 2024 |
| Aleez Ltd | Transport & logistics | 2019 |
| Alejandro Ororbia Limited | Other services | 2024 |
| Alenar Berati Ltd | Real estate | 2019 |
| Alentec Orion Limited | Manufacturing | 1928 |
| Alertis Ltd | Manufacturing | 2001 |
| Alethogen Ltd | Professional & scientific | 2023 |
| Aleto Fitness Ltd | Arts & recreation | 2023 |
| Aleto Group Ltd | Wholesale & retail | 2015 |
| Alex Law Services Limited | Transport & logistics | 2018 |
| Alex G Berry.Com Limited | Other services | 2017 |
| Alex Muscar Software Limited | Information & communication | 2026 |
| Alexander & Co Plastering Ltd | Construction | 2018 |
| Alexander Charlesworth Estates Limited | Real estate | 2023 |
| Alexander Charlesworth Limited | Real estate | 1984 |
| Alexander Michael Consulting Limited | Information & communication | 2021 |
| Alexandra West Holdings Limited | Financial services | 2016 |
| Alexlee Services Ltd | Wholesale & retail | 2023 |
| Alfa Proprietas Limited | Real estate | 2023 |
| Alfa Tech UK Limited | Wholesale & retail | 2009 |
| Alfajr Community Hub CIC | Education | 2025 |
| Alfar Solutions Ltd | Professional & scientific | 2022 |
| Alfarash Home Decor Ltd | Wholesale & retail | 2019 |
| Alfie Adams Commercials Ltd | Wholesale & retail | 2025 |
| Alfie Salih Services Limited | Transport & logistics | 2021 |
| Alfmiltom Properties Limited | Real estate | 2023 |
| Alfrasoph Limited | Administrative & support | 2018 |
| Algarve Property Site Ltd | Professional & scientific | 2014 |
| Algarve Villa Selection Limited | Hospitality | 2021 |
| Alger Developments Ltd | Construction | 2025 |
| Algorizm Limited | Information & communication | 2019 |
| ALH Prestige Property Ltd | Real estate | 2026 |
| Alhadeed Motor Services Limited | Wholesale & retail | 2017 |
| Alhambra's Food & Meat Ltd | Wholesale & retail | 2024 |
| ALI & Daood Limited | Wholesale & retail | 2020 |
| ALI Alhakeem Ltd | Health & social care | 2018 |
| ALI Autos Motor Parts Ltd | Manufacturing | 2026 |
| ALI Buildings Limited | Real estate | 2025 |
| ALI Family Investments Ltd | Real estate | 2022 |
| ALI Gujjar Transport Ltd | Transport & logistics | 2024 |
| ALI Hashmi Ltd | Wholesale & retail | 2026 |
| ALI International Transport Ltd | Transport & logistics | 2026 |
| Ali's One Stop Limited | Wholesale & retail | 2023 |
| Alias 87 Limited | Administrative & support | 2016 |
| Alibu Ltd | Wholesale & retail | 2020 |
| Alice Couture Limited | Wholesale & retail | 2024 |
| Alice Jarvis Aesthetics NW Ltd | Health & social care | 2019 |
| Alice MAE Hair Limited | Other services | 2024 |
| Alicja Shop Ltd | Wholesale & retail | 2021 |
| Alico Tyre Limited | Wholesale & retail | 2026 |
| Aligned Property Services Limited | Professional & scientific | 2018 |
| Aligned Solutions Ltd | Real estate | 2026 |
| Alinab Ltd | Other services | 2024 |
| Alison Jane Limited | Other services | 2003 |
| Alison Tucker Limited | Professional & scientific | 2014 |
| Alistair Henderson Ltd | Health & social care | 2016 |
| Alive Fire Limited | Public administration | 2016 |
| Aliyy Investments Ltd | Real estate | 2026 |
| Aliyy Online Ltd | Wholesale & retail | 2026 |
| Alkdelec Limited | Construction | 2018 |
| ALL 4 Music Limited | Education | 2012 |
| ALL About Everything Music Ltd | Wholesale & retail | 2025 |
| ALL About Success Ltd. | Professional & scientific | 2005 |
| ALL Aspex Consulting Ltd | Construction | 2025 |
| ALL Bar Cellar Products Ltd | Hospitality | 2024 |
| ALL Blooming Things Limited | Wholesale & retail | 2003 |
| ALL Brite Trade Frames Limited | Construction | 2004 |
| ALL Building Services (Bolton) Ltd | Construction | 2017 |
| ALL Buns Glazing Limited | Hospitality | 2026 |
| ALL Clear Hearing Ltd | Other services | 2015 |
| ALL Day Business Limited | Wholesale & retail | 2020 |
| ALL Engine Spares Limited | Other services | 2019 |
| ALL Goods Hub 9 Ltd | Wholesale & retail | 2025 |