| AM Squared Consulting Ltd | Professional & scientific | 2023 |
| AM Young Electrical Limited | Construction | 2023 |
| Am&Mm Family Ltd | Transport & logistics | 2015 |
| AMA & Co Contractor Limited | Construction | 2024 |
| AMA Accountancy Ltd | Professional & scientific | 2021 |
| AMA and David Ltd | Transport & logistics | 2024 |
| AMA Collective Ltd | Professional & scientific | 2025 |
| AMA Marketing & Business Solutions Ltd | Professional & scientific | 2026 |
| AMA Medical and Consulting Ltd | Professional & scientific | 2018 |
| Amad Consulting Limited | Financial services | 2025 |
| Amadys Properties Limited | Real estate | 2025 |
| Amaj Trading Limited | Real estate | 2026 |
| Amalfi Restaurant & Pizzeria Ltd | Hospitality | 2018 |
| Amali Automobiles Ltd | Wholesale & retail | 2026 |
| Amali Care Ltd | Health & social care | 2022 |
| Amali Estate Limited | Real estate | 2024 |
| Aman Motor Cars Ltd | Transport & logistics | 2022 |
| Amanda Wigginton Consulting Limited | Professional & scientific | 2020 |
| Amar Property Developments Ltd | Real estate | 2026 |
| Amar Transport Ltd | Transport & logistics | 2017 |
| Amara Automotive Ltd | Manufacturing | 2022 |
| Amara Sullaman Estates Ltd | Construction | 2026 |
| Amare Services Limited | Health & social care | 2015 |
| Amari Holdings Limited | Real estate | 2020 |
| Amari Properties Ltd | Real estate | 2021 |
| Amartrade Ltd | Wholesale & retail | 2024 |
| Amaze Farms Limited | Agriculture & fishing | 2024 |
| Amazon Flooring International UK Ltd | Wholesale & retail | 2012 |
| AMB Pharma Ltd | Wholesale & retail | 2025 |
| Amba Group Ltd | Wholesale & retail | 2018 |
| Amberdale Manufacturing Limited | Manufacturing | 1986 |
| Amberley Care Limited | Health & social care | 2013 |
| Amberlynx Limited | Professional & scientific | 2013 |
| Amberrosa Limited | Health & social care | 2024 |
| Ambience Beauty Salon Ltd | Other services | 2013 |
| Ambience Trading Limited | Wholesale & retail | 2020 |
| Ambika Enterprise Ltd | Wholesale & retail | 2025 |
| Ambika Trading Limited | Wholesale & retail | 2025 |
| Ambition in Motion Communication LLP | | 2009 |
| Ambition in Motion Limited | Information & communication | 2003 |
| Ambra Electrical Ltd | Construction | 2016 |
| Ambreze Ltd | Real estate | 2026 |
| Ambrose Bacchus Limited | Professional & scientific | 2018 |
| Ambulo (Farnham) Limited | Real estate | 2005 |
| AMC Freelance Para Limited | Health & social care | 2019 |
| AMC Haulage Ltd | Transport & logistics | 2026 |
| Amcl Investments Limited | Financial services | 2025 |
| Amcv Construction Limited | Construction | 2026 |
| AMD Decorators Limited | Construction | 2000 |
| AME Srvs Ltd | Construction | 2024 |
| Amedica Group Holdings Ltd | Financial services | 2024 |
| Amedica Group Ltd | Wholesale & retail | 2019 |
| Amela International Ltd | Wholesale & retail | 2022 |
| Amelia’S Therapies Ltd | Other services | 2023 |
| Amercourt Limited | Real estate | 1996 |
| American Candy 5STAR Ltd | Wholesale & retail | 2023 |
| American Oriental Candy & Vape Ltd | Wholesale & retail | 2024 |
| Amesbury Plumbing & Heating Limited | Construction | 2015 |
| Amevie Services Ltd | Construction | 2020 |
| AMF Design Ltd | Professional & scientific | 2023 |
| AMG Contract Services Limited | Construction | 2002 |
| AMG Controls Ltd | Professional & scientific | 2021 |
| AMG Motor Vehicle Services Limited | Wholesale & retail | 2012 |
| AMG South Limited | Hospitality | 2026 |
| Amgtec Ltd | Wholesale & retail | 2023 |
| Amherst Homes Ltd | Administrative & support | 2012 |
| Amica Ventures LLP | | 2015 |
| Amici Developments Limited | Construction | 2016 |
| Amicus Development Services Ltd | Real estate | 2015 |
| Amicus Holdings Limited | Information & communication | 2015 |
| Amicus ITS Limited | Information & communication | 1999 |
| Amid Trans Ltd | Transport & logistics | 2019 |
| Amiga Media Ltd | Information & communication | 2011 |
| Amigos Driving School Ltd | Education | 2017 |
| Amiri Partnership Limited | Administrative & support | 2005 |
| AMJ Luxe Beauty Ltd | Wholesale & retail | 2026 |
| AMJ Traders Ltd | Wholesale & retail | 2026 |
| Amjp Signature Homes Ltd | Hospitality | 2025 |
| Amka Properties Ltd | Real estate | 2025 |
| Amler Limited | Professional & scientific | 2020 |
| AMN Property Management Ltd | Real estate | 2026 |
| Amns Holdings Limited | Financial services | 2019 |
| AMO Haulage Ltd | Transport & logistics | 2016 |
| Amole Estates Ltd | Real estate | 2018 |
| Amore Catering Limited | Hospitality | 2025 |
| Amorhealthcoaching Ltd | Health & social care | 2024 |
| Amoru Agro Ltd | Wholesale & retail | 2026 |
| AMP Automotive Ltd | Extraterritorial | 2024 |
| AMP Security Ltd | Manufacturing | 2006 |
| AMP VFX Limited | Information & communication | 2019 |
| Amphitrite (South) Limited | Professional & scientific | 2021 |
| Ample Traders Limited | Wholesale & retail | 2024 |
| Amplead Limited | Information & communication | 2019 |
| Amplify Business Limited | Professional & scientific | 2025 |
| Amplify PR Limited | Professional & scientific | 2015 |
| Amport Park Mews Limited | Households | 1984 |
| Ampro Properties Ltd | Real estate | 2021 |
| Amps Power Construction Ltd | Construction | 2026 |
| Ampsuk Ltd | Real estate | 2022 |
| AMR Professional Limited | Health & social care | 2007 |