| AMR Transport Services Ltd | Wholesale & retail | 2026 |
| Amrs Group Holdings Ltd | Professional & scientific | 2023 |
| Amrs Group Limited | Real estate | 2023 |
| Amrs Holdings Ltd | Professional & scientific | 2023 |
| AMS Accountants (London) Ltd | Professional & scientific | 2018 |
| AMS Laundry Services Ltd | Other services | 2020 |
| Amsaj Ltd | Real estate | 2024 |
| Amsp Enterprise Ltd | Information & communication | 2022 |
| AMT Foundation Limited | Health & social care | 2014 |
| AMT Lawyers Holdings Limited | Financial services | 2013 |
| AMT Lawyers Ltd | Professional & scientific | 2010 |
| Amtr System Ltd | Wholesale & retail | 2025 |
| Amval NE Ltd | Real estate | 2024 |
| AMW Tax Consultants Ltd | Professional & scientific | 2024 |
| Amyah Investments Ltd | Real estate | 2025 |
| Amys Group Ltd | Wholesale & retail | 2017 |
| AMZ Pharmacure Ltd | Wholesale & retail | 2026 |
| AMZ-FBA786 Ltd | Wholesale & retail | 2023 |
| AN Cars Sales Limited | Wholesale & retail | 2024 |
| ANA Asset Management Ltd | Households | 2023 |
| Anacott CMS Ltd | Professional & scientific | 2020 |
| Anam Baksh Ltd | Construction | 2024 |
| Anam Optics Ltd | Wholesale & retail | 2022 |
| Anarkali Blackburn Designer Ltd | Wholesale & retail | 2025 |
| Anarkali Blackburn Ltd | Wholesale & retail | 2019 |
| Ancient Mariner Furniture Co. Ltd | Wholesale & retail | 1995 |
| Andalausia Ltd | Hospitality | 2019 |
| Anderson & Wyatt Limited | Professional & scientific | 2012 |
| Andrew Murray (Investments) Limited | Professional & scientific | 2005 |
| Angel Access Solutions Limited | Health & social care | 2025 |
| Angelic Desserts Ltd | Manufacturing | 2025 |
| Angies PUB Co Ltd | Hospitality | 2024 |
| Anglo-Nevadan Ventures, Ltd | Professional & scientific | 2007 |
| ANH Holding Ltd | Administrative & support | 2021 |
| Animal Lodge Limited | Other services | 2023 |
| Anisha's Collection Ltd | Wholesale & retail | 2016 |
| ANJ Investments (NW) Limited | Professional & scientific | 2005 |
| ANK Traders Limited | Wholesale & retail | 2019 |
| ANN Care Limited | Administrative & support | 2018 |
| Anna Living Ltd | Wholesale & retail | 2025 |
| Anna's Wings Limited | Arts & recreation | 2025 |
| Another Way Ltd | Real estate | 2012 |
| ANS Clarence Ltd | Real estate | 2024 |
| ANS Transportation and Logistics Ltd | Transport & logistics | 2025 |
| ANS1 Ltd | Financial services | 2023 |
| Ansca Limited | Construction | 1975 |
| Ansif Properties Limited | Real estate | 2026 |
| Antalya Barbers (Accrington) Limited | Other services | 2023 |
| Antalya Barbers (Blackburn) Ltd | Other services | 2025 |
| Antalya Barbers (NW) Ltd | Other services | 2019 |
| ANU Trading Limited | Real estate | 2013 |
| Anu's Sporting Goods Limited | Wholesale & retail | 2016 |
| Anukha Ltd | Hospitality | 2023 |
| Anvil Law Limited | Professional & scientific | 2012 |
| Anvil Property Management Limited | Real estate | 2010 |
| Anwar Halal Meats Ltd | Wholesale & retail | 2025 |
| Anwar Property Holding Ltd | Real estate | 2026 |
| Anwar-Qureshi Properties Ltd | Real estate | 2023 |
| ANY Trade (NW) Ltd | Administrative & support | 2025 |
| Aonv Ltd | Administrative & support | 2024 |
| AP & Co Group Limited | Information & communication | 2020 |
| AP Financial Services Limited | Administrative & support | 2025 |
| AP Joinery & Contracting Limited | Construction | 2026 |
| AP Landscaping Ltd | Administrative & support | 2021 |
| AP Media Limited | Arts & recreation | 2014 |
| AP Property Management Ltd | Households | 2025 |
| AP Strategies Ltd | Wholesale & retail | 2025 |
| AP Web Design Ltd | Wholesale & retail | 2025 |
| AP5 Travel Ltd | Administrative & support | 2025 |
| APA (Corby) Ltd | Wholesale & retail | 2025 |
| APA (Stockport) Ltd. | Wholesale & retail | 2010 |
| APB Consultants Limited | Professional & scientific | 2018 |
| Apex & Co Enterprise Ltd | Wholesale & retail | 2025 |
| Apex Building Ltd | Construction | 2025 |
| Apex Curtains Ltd | Construction | 2024 |
| Apex Distro Ltd | Wholesale & retail | 2025 |
| Apex Group of Companies Ltd | Financial services | 2025 |
| Apex Scaffolding Solutions Ltd | Construction | 2025 |
| Apex UN Limited | Manufacturing | 2017 |
| Apex Voyage Group Ltd | Administrative & support | 2025 |
| Apfs Financial Solutions LLP | | 2010 |
| APG Bookkeeping Limited | Professional & scientific | 2020 |
| API Imaging Limited | Health & social care | 2020 |
| Apparel Gate Ltd | Wholesale & retail | 2025 |
| Apple Code Limited | Wholesale & retail | 2023 |
| Appleby Motors Ltd | Wholesale & retail | 2024 |
| Apples to Apples Limited | Information & communication | 2023 |
| Applications Assist Limited | Information & communication | 2018 |
| Applied North West Limited | Professional & scientific | 2023 |
| Appolonia Ltd | Professional & scientific | 2024 |
| Approach Medical Ltd | Wholesale & retail | 2013 |
| APS 1 Ltd | Real estate | 2024 |
| Aptly Named Capital Limited | Financial services | 2025 |
| Aptus Property Holdings Ltd. | Real estate | 2016 |
| Aptus Property Rentals Ltd | Real estate | 2003 |
| AQ Cost Consulting Ltd | Professional & scientific | 2022 |
| AQ Solar Ltd | Professional & scientific | 2024 |
| Aqasa Ltd | Real estate | 2020 |
| Aqeel Optics Ltd | Health & social care | 2025 |
| Aqil Healthcare Enterprises Ltd | Health & social care | 2012 |