| AL Haya Heritage Ltd | Wholesale & retail | 2025 |
| AL Haya Tours & Travels Ltd | Administrative & support | 2024 |
| AL Madinah Travels and Tourism Dewsbury Ltd | Transport & logistics | 2024 |
| AL Rida Bradford Ltd | Wholesale & retail | 2024 |
| AL Rida Dewsbury Ltd | Wholesale & retail | 2024 |
| AL Rida Ltd | Financial services | 2023 |
| AL Siraaj Travel Services Ltd | Administrative & support | 2025 |
| Al-Buraq Developers Limited | Construction | 2025 |
| Alaia Noor Ltd | Manufacturing | 2019 |
| Alaidy's Ltd | Health & social care | 2026 |
| Alan Finish & Seal Group Ltd | Construction | 2026 |
| Alco Components Ltd | Wholesale & retail | 2018 |
| Aletheia Consulting Ltd | Professional & scientific | 2018 |
| Alex Pickles Limited | Financial services | 2018 |
| Alfahad Foods Limited | Wholesale & retail | 2020 |
| Alibaba (Fast Food) Ltd | Hospitality | 2019 |
| Alif Investments Limited | Real estate | 2023 |
| Alin LL Transport Ltd | Transport & logistics | 2025 |
| Alis Auto Repair Ltd | Wholesale & retail | 2025 |
| Aliyah Audiolgy Ltd | Health & social care | 2025 |
| Aliyah Pharms Ltd | Health & social care | 2023 |
| ALL Beds Ltd | Manufacturing | 2026 |
| ALL Clad Facades Ltd | Construction | 2020 |
| ALL Furniture Timbers Ltd | Wholesale & retail | 2023 |
| ALL My Bills Ltd | Information & communication | 2020 |
| ALL Seasons Import & Export UK Ltd | Wholesale & retail | 2021 |
| Alldriveways Groundwork Utilities Ltd | Construction | 2021 |
| Alldriveways.Co.Uk Sudstone Ltd | Construction | 2025 |
| Alleyflow Limited | Real estate | 2025 |
| Alliance Couriers Limited | Transport & logistics | 2010 |
| Alliance Holdings (Gargrave) Ltd | Real estate | 2023 |
| Alliance Holdings (Gosforth) Ltd | Real estate | 2023 |
| Alliance Holdings (Lincoln) Ltd | Real estate | 2023 |
| Alliance Holdings (Rossington) Ltd | Real estate | 2026 |
| Alloy Wheel Recon Ltd | Other services | 2022 |
| Allure Esthetique Ltd | Other services | 2025 |
| Alma Care Services Ltd | Health & social care | 2018 |
| Alpha Cash & Carry Limited | Wholesale & retail | 2011 |
| Alpha Health Medical Services Ltd | Health & social care | 2015 |
| Alpha Lamina Ltd | Real estate | 2024 |
| Alphareach Learning Ltd | Education | 2009 |
| ALS Plumbing & Heating Limited | Construction | 2012 |
| Alum Limited | Health & social care | 2021 |
| Alverthorpe Road Ltd | Transport & logistics | 2013 |
| AM ALI Lettings Ltd | Real estate | 2013 |
| AM and DEE Ltd | Wholesale & retail | 2023 |
| AM Locums Limited | Health & social care | 2017 |
| AM NO1 Ltd | Wholesale & retail | 2023 |
| AM Travels Ltd | Transport & logistics | 2019 |
| AMA Medics Ltd | Health & social care | 2020 |
| AMA Property Holdings Ltd | Real estate | 2025 |
| Amaan Management Ltd | Real estate | 2016 |
| Amaana ZEN Spa Ltd | Other services | 2024 |
| Amaar Energy Services Ltd | Construction | 2026 |
| Amalia Investments Ltd | Real estate | 2013 |
| Amanah IE Ltd | Wholesale & retail | 2025 |
| Amayaan Limited | Transport & logistics | 2025 |
| Amber Estates Ltd | Real estate | 2005 |
| AMC Contracting Limited | Professional & scientific | 2015 |
| Amctag Ltd | Information & communication | 2025 |
| AMD Advisers Limited | Professional & scientific | 2018 |
| Amef Property Investments Limited | Real estate | 2025 |
| AMERICA2UK Limited | Wholesale & retail | 2025 |
| American Flavours Ltd | Wholesale & retail | 2021 |
| AMH Transport Services Ltd | Transport & logistics | 2025 |
| Amjad Khan Properties Ltd | Real estate | 2021 |
| Ammaras Islamabad Limited | Wholesale & retail | 2015 |
| Amrans Ltd | Wholesale & retail | 2019 |
| Amris Living Ltd | Wholesale & retail | 2025 |
| Amvisioncare Ltd | Other services | 2021 |
| AN Khan Ltd | Transport & logistics | 2024 |
| Anbys 25 Limited | Real estate | 2015 |
| Andral Consultancy Ltd | Professional & scientific | 2024 |
| Andromeda’S Sacrifice Ltd | Wholesale & retail | 2024 |
| Andsyk Limited | Arts & recreation | 2018 |
| Aneesa (UK) Pharma Ltd | Health & social care | 2021 |
| Anglo Stainless Limited | Manufacturing | 1987 |
| Angus Showroom Restaurant Limited | Hospitality | 2021 |
| ANI Consultancy Services Ltd | Other services | 2023 |
| Animaa Estates Limited | Real estate | 2023 |
| ANM Couriers Ltd | Transport & logistics | 2025 |
| Anmata Limited | Construction | 2025 |
| Anthony Holladay (Electrical Contractor) Limited | Construction | 2003 |
| Anytime Express Couriers Ltd | Transport & logistics | 2018 |
| AP Holdings & Acquisitions Limited | Real estate | 2022 |
| AP Optics Ltd | Health & social care | 2021 |
| AP Visioncare Ltd | Health & social care | 2024 |
| Apex Beds Ltd | Wholesale & retail | 2026 |
| Apex GAS & Property Services Ltd | Construction | 2026 |
| Apex Hydraulics Limited | Manufacturing | 1987 |
| Apex Property Estates Ltd | Hospitality | 2026 |
| Apex Resources(Uk) Ltd | Real estate | 2019 |
| Apex Tiles and Bathroom Outlet Ltd | Wholesale & retail | 2019 |
| Aplite Pro Ltd | Hospitality | 2016 |
| APS Autocare Limited | Wholesale & retail | 2020 |
| Aqal Group Ltd | Information & communication | 2026 |
| AR Conveyancing Ltd | Professional & scientific | 2018 |
| AR Enterprise Dewsbury Ltd | Real estate | 2025 |
| AR Locums Ltd | Wholesale & retail | 2022 |
| AR Medical Services Ltd | Health & social care | 2018 |