| Amel Estates Ltd | Real estate | 2025 |
| Amelie Nail Ltd | Other services | 2020 |
| Amelious Group Ltd | Wholesale & retail | 2023 |
| American Fried Chicken Ltd | Wholesale & retail | 2019 |
| American Holidays Limited | Professional & scientific | 2025 |
| Amery Properties and Investments Limited | Real estate | 2017 |
| Amethyst Global Supplies Ltd | Wholesale & retail | 2024 |
| Amethyst Quartz Consultancy Ltd | Real estate | 2018 |
| Ameya Ventura PVT Ltd | Real estate | 2021 |
| AMG Achieve Maximise Grow Ltd | Professional & scientific | 2025 |
| AMG Fish Bar (Hatch END) Limited | Hospitality | 2024 |
| AMG Hotel and Resort Sales Ltd | Professional & scientific | 2012 |
| AMG Oncology Services Limited | Health & social care | 2018 |
| AMG Restorative Limited | Health & social care | 2022 |
| AMH Legal Consulting Services Limited | Professional & scientific | 2019 |
| AMI Harrow Living Limited | Construction | 2026 |
| Ami's Indian Food Limited | Hospitality | 2023 |
| Amic Consultants Limited | Wholesale & retail | 2023 |
| Amicum Team Ltd | Wholesale & retail | 2016 |
| Amigo International Trading Limited | Professional & scientific | 2014 |
| Amigo's Palace Ltd | Hospitality | 2019 |
| Amigos ERP Consultants Ltd | Information & communication | 2011 |
| Amigos Restaurant Ltd | Hospitality | 2024 |
| Amin Accountants Ltd | Professional & scientific | 2020 |
| Amin Alchemy Ltd | Professional & scientific | 2025 |
| Amin Holdings Group Limited | Financial services | 2025 |
| Amin Medicare Limited | Professional & scientific | 2018 |
| Amina Holdings Ltd | Financial services | 2017 |
| Amina Property Limited | Real estate | 2024 |
| Amineel Properties Ltd | Real estate | 2025 |
| Aminique Ltd | Manufacturing | 2026 |
| Amipara Holdings Ltd | Financial services | 2022 |
| Amir Construction Global Ltd | Professional & scientific | 2025 |
| Amir Construction Ltd | Construction | 2021 |
| Amir Ghani Properties Ltd | Real estate | 2021 |
| Amirco Ltd | Wholesale & retail | 2013 |
| Amish Z Consultancy Ltd | Professional & scientific | 2020 |
| Amit & Mani Ltd | Real estate | 2023 |
| Amit Amin Medical Services Limited | Health & social care | 2017 |
| Amjt JAY Ltd | Real estate | 2025 |
| AMK London Building Construction Ltd | Real estate | 2008 |
| AMK Renovation Ltd | Construction | 2023 |
| Amkm Property Ltd | Real estate | 2025 |
| Amlaks Limited | Real estate | 2012 |
| Amlev Limited | Professional & scientific | 2020 |
| Amma House Ltd | Real estate | 2024 |
| Amma Shop UK Ltd | Wholesale & retail | 2019 |
| Ammachiidlydosa Ltd | Hospitality | 2023 |
| Ammatix Media Ltd | Information & communication | 2025 |
| Ammba Developments Ltd | Real estate | 2018 |
| Ammu Express Limited | Hospitality | 2024 |
| Amnis Investments Limited | Administrative & support | 2020 |
| AMO Creative Design Limited | Information & communication | 2014 |
| Amora London Ltd | Wholesale & retail | 2026 |
| Amore Sailing Ltd | Transport & logistics | 2023 |
| Amorove Ltd | Wholesale & retail | 2026 |
| Amos Services Limited | Construction | 2022 |
| Amoun Travel & Tours Limited | Administrative & support | 1989 |
| Amour Store Ltd | Information & communication | 2024 |
| AMP Builder Ltd | Construction | 2021 |
| AMP Derivatives Ltd | Financial services | 2009 |
| AMP Locums Ltd | Professional & scientific | 2023 |
| Ampac Trading Limited | Wholesale & retail | 2009 |
| Ampar Limited | Professional & scientific | 2014 |
| Ampee Engineering Limited | Manufacturing | 2018 |
| Amphitrite Underwriting Limited | Financial services | 2018 |
| Ampire Group Ltd | Real estate | 2012 |
| Ampm Pharma Limited | Other services | 2018 |
| Ampm Private Limited | Hospitality | 2025 |
| Ampri Properties Ltd | Real estate | 2016 |
| Amprise Services Ltd | Construction | 2026 |
| Ampthill Investments Limited | Hospitality | 2011 |
| Amrad Properties Ltd | Professional & scientific | 2025 |
| Amrahs UK Private Limited | Other services | 2022 |
| Amrani Media Limited | Administrative & support | 2022 |
| Amratjivan Limited | Real estate | 2021 |
| Amrita Sparkle Limited | Health & social care | 2019 |
| Amrut (UK) Ltd | Manufacturing | 2003 |
| Amrut Kangen Ltd | Wholesale & retail | 2021 |
| AMS Business Management Limited | Professional & scientific | 2025 |
| AMS Care Holdings Limited | Financial services | 2019 |
| AMS Care Investments Limited | Administrative & support | 2008 |
| AMS Care Limited | Health & social care | 2006 |
| AMS Care Wiltshire Limited | Health & social care | 2010 |
| AMS Group Properties Ltd | Real estate | 2026 |
| AMS Production Ltd | Information & communication | 2024 |
| Amsa Lifesciences Limited | Wholesale & retail | 2025 |
| AMT Builders Ltd | Other services | 2014 |
| AMT Medical Services Limited | Health & social care | 2001 |
| AMT Property Investors Limited | Real estate | 2020 |
| AMT Sports Limited | Wholesale & retail | 2007 |
| Amtari Marketing Ltd | Professional & scientific | 2026 |
| Amtex Software Consulting Limited | Information & communication | 2013 |
| Amtex Solutions Ltd | Information & communication | 2012 |
| Amuzang Ltd | Administrative & support | 2009 |
| Amvi Properties Limited | Real estate | 2023 |
| Amwa Properties Limited | Real estate | 2021 |
| Amwell Driveways Ltd | Administrative & support | 2025 |
| Amwell Residential Limited | Real estate | 2024 |
| AMY CC Ltd | Administrative & support | 2024 |