| AM Services (UK) Ltd | Real estate | 2002 |
| AM Square Group Limited | Manufacturing | 2023 |
| AM Traders Wholesale Limited | Wholesale & retail | 2025 |
| Am.It Tech Limited | Information & communication | 2019 |
| AM3 Consultancy Ltd | Professional & scientific | 2025 |
| AMA Revive&Shine Limited | Administrative & support | 2025 |
| AMA UK Consultancy Limited | Professional & scientific | 2012 |
| AMA Wiring Solutions Ltd | Manufacturing | 2023 |
| Amaby Care Limited | Public administration | 2020 |
| Amaf (Coventry) Ltd | Education | 2023 |
| Amajee Ltd | Real estate | 2024 |
| Amalgamated American Finance Limited | Real estate | 2015 |
| Amalgamation Complex Limited | Real estate | 2022 |
| Amalia&Lucian Logistics Ltd | Transport & logistics | 2024 |
| Aman & a Property Ltd | Real estate | 2017 |
| Aman Coot Ltd | Hospitality | 2025 |
| Aman Market Ltd | Wholesale & retail | 2024 |
| Aman's Alarms Limited | Administrative & support | 2019 |
| AMAN1 Ltd | Hospitality | 2023 |
| Amanda Investment Ltd | Real estate | 2024 |
| Amanda Skin & Massage Therapist Limited | Other services | 2024 |
| Amandlaethu Ltd | Health & social care | 2026 |
| Amani CB Services Limited | Health & social care | 2019 |
| Amankwaa Limited | Real estate | 2026 |
| Amans News & OFF Licence Limited | Wholesale & retail | 2018 |
| Amansons Limited | Construction | 2016 |
| Amara Estates Ltd | Real estate | 2021 |
| Amaral&Ribeiro Ltd | Wholesale & retail | 2018 |
| Amari Transport Services Ltd | Transport & logistics | 2024 |
| Amaris Health Ltd | Health & social care | 2025 |
| Amarvind Limited | Professional & scientific | 2025 |
| Amass Business and Tax Consultants Ltd | Professional & scientific | 2022 |
| Amatec Ltd | Wholesale & retail | 2009 |
| Amatech Services Ltd | Construction | 2025 |
| Amath the Gardener Limited | Arts & recreation | 2025 |
| Amathias Limited | Professional & scientific | 2003 |
| Amathus Strategy Limited | Professional & scientific | 2024 |
| Amaya Trade Ltd | Wholesale & retail | 2022 |
| Amayra Cakes Ltd | Wholesale & retail | 2023 |
| Amaze Housing Limited | Real estate | 2018 |
| Amaze IT Limited | Professional & scientific | 2012 |
| Amazex Limited | Wholesale & retail | 2025 |
| Amazing Accountancy Ltd | Professional & scientific | 2012 |
| Amazing Little Trains Ltd | Manufacturing | 2018 |
| AMB Cook Limited | Professional & scientific | 2025 |
| AMB Haulage Ltd | Transport & logistics | 2025 |
| Amba Recruitment Limited | Administrative & support | 2023 |
| Amba Solution Ltd | Information & communication | 2022 |
| Ambala Sweet Centre Ltd | Wholesale & retail | 2025 |
| Ambala Sweets Edinburgh Ltd | Hospitality | 2025 |
| Ambasador Ltd | Transport & logistics | 2016 |
| Ambe Supermarket Limited | Wholesale & retail | 2011 |
| Ambera Limited | Information & communication | 2022 |
| Amberpreet Limited | Manufacturing | 2025 |
| Ambiance Floors Limited | Wholesale & retail | 2007 |
| Ambiance Holdings Limited | Financial services | 2019 |
| Ambient Creations Ltd | Information & communication | 2025 |
| Ambilicam Consulting Limited | Extraterritorial | 2014 |
| Ambitico Limited | Administrative & support | 2023 |
| Ambrot Civil Engineering & Construction Ltd | Construction | 2017 |
| Ambs Trading Ltd | Wholesale & retail | 2024 |
| Ambulatio Limited | Professional & scientific | 2007 |
| AMC Pharma Consultant Limited | Professional & scientific | 2024 |
| AMD Engineering Ltd | Professional & scientific | 2022 |
| AMD Plant & Machine Hire Ltd | Administrative & support | 2021 |
| AMD Properties Holdings Limited | Real estate | 2024 |
| AMD Techtronix Ltd | Wholesale & retail | 2022 |
| Amdtech Coventry Ltd | Wholesale & retail | 2018 |
| Amdtech Midlands Limited | Wholesale & retail | 2026 |
| AME Bioscience Limited | Professional & scientific | 2003 |
| Ameira Therapies Ltd | Health & social care | 2018 |
| Ameland Limited | Manufacturing | 2006 |
| Ameland Reprocessing Ltd | Water & waste | 2026 |
| Amelectrician Ltd | Construction | 2025 |
| Amelia Living Limited | Real estate | 2019 |
| Amelias Hair & Cosmetics Ltd | Wholesale & retail | 2022 |
| Amen Cleaning Ltd | Administrative & support | 2023 |
| American Nail Design Limited | Other services | 2026 |
| Amethyst Contracts Limited | Manufacturing | 2003 |
| Amethyst Investment Management Ltd | Real estate | 2022 |
| AMF Drylining Ltd | Construction | 2025 |
| AMF Services Ltd | Professional & scientific | 2025 |
| Amfj Investments Ltd | Extraterritorial | 2016 |
| AMG Express Couriers Ltd | Transport & logistics | 2025 |
| AMH Matrix Ltd | Real estate | 2024 |
| AMI Hand Car Wash Ltd | Wholesale & retail | 2015 |
| Amicale Healthcare Ltd | Public administration | 2020 |
| Amico Capital Limited | Financial services | 2014 |
| Amico Design Limited | Professional & scientific | 2020 |
| Amico Properties & Development Limited | Real estate | 2024 |
| Amini Autos Ltd | Wholesale & retail | 2019 |
| Aminmiro Ltd | Wholesale & retail | 2024 |
| Amir & Co Worldwide Trading Limited | Wholesale & retail | 2025 |
| Amir & Sons Worldwide Limited | Wholesale & retail | 2026 |
| Amir Hamid EYE Care LLP | | 2022 |
| Amity Fitness Limited | Arts & recreation | 2023 |
| AMJ Property Group Ltd | Real estate | 2021 |
| AMJ Saws Limited | Manufacturing | 2003 |
| AMJ Wholesale Ltd | Manufacturing | 2025 |
| AMK Rentals Limited | Real estate | 2021 |