| AM Travel Solutions Ltd | Administrative & support | 2014 |
| AM1881 Ltd | Wholesale & retail | 2018 |
| AMA Furniture Ltd | Wholesale & retail | 2022 |
| Amaal Lettings Limited | Real estate | 2023 |
| Amaal Trading Limited | Wholesale & retail | 2017 |
| Amaal Training Limited | Education | 2019 |
| Amaana Trading Ltd | Wholesale & retail | 2023 |
| Amaanah International Limited | Wholesale & retail | 2021 |
| Amaanii Limited | Wholesale & retail | 2020 |
| Amak Property Limited | Real estate | 2022 |
| Amala Trading Ltd | Wholesale & retail | 2024 |
| Amal’S Attic Ltd | Wholesale & retail | 2022 |
| Aman Trade Ltd | Wholesale & retail | 2022 |
| Amana Sales Ltd | Wholesale & retail | 2023 |
| Amanah Consultancy Ltd | Professional & scientific | 2019 |
| Amanah Empire Ltd | Wholesale & retail | 2026 |
| Amanah Sales Ltd | Wholesale & retail | 2024 |
| Amanah Stores Ltd | Wholesale & retail | 2021 |
| Amanah Trader Ltd | Wholesale & retail | 2023 |
| Amanuel Travel Ltd | Transport & logistics | 2026 |
| Amar Shazard Ltd | Other services | 2015 |
| Amasales Ltd | Wholesale & retail | 2022 |
| Amaze Mart Ltd | Manufacturing | 2025 |
| Amazing Dales Limited | Real estate | 2013 |
| Amazing Grace Entertainment Ltd | Extraterritorial | 2023 |
| Amazing Stuff Ltd | Hospitality | 2024 |
| Amazon Parcels Ltd | Transport & logistics | 2026 |
| Amazplus Limited | Wholesale & retail | 2023 |
| AMB BA Services Ltd | Professional & scientific | 2026 |
| AMB Property Solutions Ltd | Real estate | 2025 |
| Ambassador Textiles Holdings Ltd | Financial services | 2025 |
| Amber & Co.(Yorkshire) Limited | Wholesale & retail | 2023 |
| Amber Shore Sleep Consultancy Ltd | Professional & scientific | 2025 |
| Ambermont Properties Limited | Real estate | 2013 |
| Ambi Better Ltd | Information & communication | 2025 |
| Ambiation Limited | Information & communication | 2009 |
| Ambient Technical Holdings Limited | Financial services | 2026 |
| Ambient Technical Limited | Construction | 2017 |
| Ambient Trading Ltd | Wholesale & retail | 2022 |
| AMC Architectural Ltd | Construction | 2022 |
| AMC Campers Limited | Wholesale & retail | 2025 |
| Amck Group Ltd | Financial services | 2026 |
| AMD Hires Ltd | Transport & logistics | 2024 |
| Amdos Security Ltd | Administrative & support | 2018 |
| Amelia Alex Limited | Arts & recreation | 2025 |
| Amelia Hanna Holdings Limited | Real estate | 2022 |
| Amelia Rose Coiffeur Limited | Other services | 2011 |
| Amelia Rose Limited | Financial services | 2019 |
| Amethyst Group Holdings Ltd | Financial services | 2023 |
| Amhudtrade Ltd | Wholesale & retail | 2026 |
| Amin Group Trading Ltd | Wholesale & retail | 2023 |
| Amina Bint Neal Ltd | Real estate | 2020 |
| Amir Healthcare Ltd | Other services | 2013 |
| Amjad's Takeaway Ltd | Hospitality | 2018 |
| Amjd Constructions Ltd | Construction | 2026 |
| AMK Business Consulting Ltd | Professional & scientific | 2026 |
| AMK Dental Associates Limited | Health & social care | 2023 |
| AMK Installations & Holdings Limited | Financial services | 2023 |
| AML Legal Ltd | Professional & scientific | 2018 |
| Ammar Alkhabbaz Ltd | Health & social care | 2026 |
| Amna Group Ltd | Professional & scientific | 2026 |
| Amna Medical Services Ltd | Health & social care | 2022 |
| Amo(Gb) Limited | Wholesale & retail | 2011 |
| Amora LEX Ltd | Professional & scientific | 2025 |
| Amore Investments (Yorkshire) Limited | Financial services | 2025 |
| Amostiasis Consultz Limited | Professional & scientific | 2017 |
| Amour Hair Ltd | Other services | 2024 |
| Ampaeus Ltd | Extraterritorial | 2013 |
| Ampedge Global Ltd | Wholesale & retail | 2026 |
| Ampire Ltd | Wholesale & retail | 2022 |
| Amplified Media Ltd | Professional & scientific | 2018 |
| AMR Associates Limited | Administrative & support | 2026 |
| Amradn Enterprise Ltd | Wholesale & retail | 2023 |
| Amroe Engineering Limited | Professional & scientific | 2013 |
| AMS Mortgages Limited | Financial services | 2026 |
| AMS Optical Ltd | Health & social care | 2023 |
| AMS Transport Consultancy Ltd | Professional & scientific | 2026 |
| Amsa Green Ltd | Wholesale & retail | 2022 |
| Amsula Ayurveda Ltd | Health & social care | 2022 |
| AMY Marie Limited | Hospitality | 2025 |
| Amya Carwash 2 Ltd | Administrative & support | 2025 |
| AMZ Mpharm Ltd | Professional & scientific | 2017 |
| AMZ0N 3XP3RT Ltd | Wholesale & retail | 2025 |
| Amzad Nadeem Ltd | Transport & logistics | 2025 |
| Amzani Elite Ltd | Wholesale & retail | 2021 |
| AN Autos Limited | Wholesale & retail | 2018 |
| AN Carpets Ltd | Wholesale & retail | 2023 |
| AN Mpharm Ltd | Health & social care | 2022 |
| An-Naafi Ltd | Wholesale & retail | 2023 |
| An-Naseeha Foundation Community Interest Company | Other services | 2009 |
| ANA Clara Sancovich Limited | Professional & scientific | 2022 |
| Anamaria Healthcare Limited | Wholesale & retail | 2017 |
| Anaruz Ltd | Wholesale & retail | 2022 |
| Anastasia Lighting Limited | Wholesale & retail | 1992 |
| Anatman Ltd | Education | 2024 |
| Anbison LAB. UK Ltd | Manufacturing | 2020 |
| Anchor Fish & Chips (Hudds) Ltd | Hospitality | 2023 |
| Anchor Group Solutions Limited | Water & waste | 2026 |
| Anchorfield Property Ltd | Real estate | 2026 |
| Anchorx Ltd | Professional & scientific | 2025 |