| Amaf Traders Ltd | Wholesale & retail | 2024 |
| Aman UK Investments Ltd | Real estate | 2020 |
| Amaranth Insight Limited | Professional & scientific | 2017 |
| Amare Construction Ltd | Construction | 2023 |
| Amare Deluxe Stays Ltd | Hospitality | 2022 |
| Amateur Judo Association Limited | Arts & recreation | 2004 |
| Amayzing Ltd | Wholesale & retail | 2018 |
| Amazer Ltd | Wholesale & retail | 2017 |
| Amber & Bros Ltd | Hospitality | 2018 |
| Amber Occupational Psychology Solutions Ltd | Health & social care | 2012 |
| Amber Pharm Ltd | Wholesale & retail | 2019 |
| Amberhair Limited | Other services | 2026 |
| Ambermen Limited | Real estate | 1985 |
| AMC Property Midlands Ltd | Real estate | 2019 |
| AMD Takeaway Ltd | Hospitality | 2023 |
| Amdad Ahmed Limited | Health & social care | 2016 |
| Amdj Properties Limited | Real estate | 2016 |
| Amen Property Limited | Real estate | 2020 |
| Amer Uddin Sutton Ltd | Hospitality | 2021 |
| Amgencey Limited | Professional & scientific | 2025 |
| Amgfinancialadvise Ltd | Financial services | 2026 |
| AMI Surveying Limited | Professional & scientific | 2025 |
| Ami(West Midlands) Ltd | Real estate | 2021 |
| Amigo Grill 786 Limited | Hospitality | 2019 |
| Amigos Real Estate and Lettings Limited | Real estate | 2025 |
| Amir Engineering Ltd | Administrative & support | 2007 |
| Amity Unique Homes Limited | Real estate | 2023 |
| AMJ Drains Limited | Construction | 2025 |
| AMJ Emergency Roof Repair Limited | Wholesale & retail | 2019 |
| AMJ Estates Limited | Real estate | 2025 |
| Amosseed Ltd | Administrative & support | 2021 |
| Ample Harvest 555 Food Ltd | Hospitality | 2025 |
| Ample Harvest 555 Group Ltd | Hospitality | 2024 |
| Amplify Electrical Ltd | Construction | 2026 |
| Amplify-Yp Limited | Professional & scientific | 2019 |
| Amru Private Client Limited | Professional & scientific | 2025 |
| AMS Car Hire Ltd | Wholesale & retail | 2025 |
| AMS Computer Services Ltd | Information & communication | 2026 |
| Amsmk Ltd | Wholesale & retail | 2021 |
| AMW Consultancy & Training Limited | Arts & recreation | 2014 |
| AMW Plumbing and Heating Services Ltd | Construction | 2019 |
| AN Trading WM Ltd | Wholesale & retail | 2023 |
| ANA Development Group Limited | Extraterritorial | 2021 |
| Analeptic Health Ltd | Health & social care | 2025 |
| Analytics in Action Ltd | Professional & scientific | 2017 |
| Anam Cara Limited | Health & social care | 2008 |
| Anamation Ltd | Information & communication | 2017 |
| Anan Investment Ltd | Real estate | 2025 |
| Anand & Sree Ltd | Health & social care | 2019 |
| Anandgul Ltd | Health & social care | 2021 |
| Anant Providers Ltd | Health & social care | 2016 |
| Anaspana Ltd | Real estate | 2020 |
| Anberry Limited | Health & social care | 2024 |
| Anchor Brook Cafe Aldridge Limited | Hospitality | 2021 |
| Anchor Property Services Limited | Real estate | 2017 |
| Ancient Jewels Ltd | Wholesale & retail | 2025 |
| Ancs (Midlands) Limited | Professional & scientific | 2017 |
| Andrew Blower Limited | Financial services | 2014 |
| Andrew Burns Consulting Limited | Professional & scientific | 2019 |
| Andrew Martin & Associates Ltd. | Health & social care | 2012 |
| Andrew Martin Optometrist Ltd | Health & social care | 2003 |
| Android Dreams Ltd | Information & communication | 2015 |
| Andy Bloxham Consulting Limited | Professional & scientific | 2025 |
| Andy Moss Advisory Limited | Professional & scientific | 2025 |
| ANG Supplies Ltd | Financial services | 2019 |
| Angel Akira Ltd | Administrative & support | 2022 |
| Angel Midlands Limited | Health & social care | 2017 |
| Angel Resolutions Ltd | Financial services | 2026 |
| Angelovski Ltd | Professional & scientific | 2026 |
| Angelpure Ltd. | Wholesale & retail | 2011 |
| Anglian Funeral Service Limited | Extraterritorial | 1988 |
| Angling Paradise Ltd Limited | Administrative & support | 2020 |
| Anglo Ascot Group Limited | Information & communication | 2026 |
| Anglo-Euro Consultants Limited | Professional & scientific | 2004 |
| Angstrom Research Ltd | Information & communication | 2026 |
| Aniber & Sons Trading Ltd | Wholesale & retail | 2015 |
| Animativ Ltd | Wholesale & retail | 2026 |
| Anish Consulting Limited | Professional & scientific | 2017 |
| Anitya Ltd | Professional & scientific | 2023 |
| Anjai Limited | Real estate | 2020 |
| Anlor Aura Limited | Health & social care | 2022 |
| Annabella Catering Limited | Hospitality | 2010 |
| Annabella Limited | Hospitality | 2003 |
| Anne Beverley Limited | Information & communication | 2025 |
| Anne Troman Ltd | Professional & scientific | 2013 |
| Annette Ivins Fashion Agency Limited | Wholesale & retail | 2022 |
| Annexe Properties Limited | Professional & scientific | 2021 |
| Anoop Korotane Limited | Professional & scientific | 2012 |
| Another BAD Idea Limited | Hospitality | 2017 |
| Another Level Lifts Limited | Construction | 2014 |
| ANR Corporation Ltd | Financial services | 2013 |
| Anrya Letting & Properties Limited | Real estate | 2021 |
| ANS Electrical Contractors Limited | Construction | 2009 |
| Antella Recruitment Ltd | Administrative & support | 2021 |
| Anthony Redmile Limited | Wholesale & retail | 2013 |
| Anthus Pharma Ltd | Wholesale & retail | 2025 |
| Antiga Limited | Information & communication | 2005 |
| Antipodes Wellness UK Limited | Wholesale & retail | 2019 |
| Antony & Co Accountants Ltd | Professional & scientific | 2011 |
| Antony & Co Holding Ltd | Financial services | 2023 |