| Amnk TV Ltd | Information & communication | 2025 |
| Amnums Ltd | Wholesale & retail | 2024 |
| AMO Couture Ltd | Wholesale & retail | 2018 |
| Amococo Ltd | Wholesale & retail | 2025 |
| Amodeo Building Limited | Wholesale & retail | 1983 |
| Amodeo Holdings Limited | Construction | 1982 |
| Amodeo Limited | Construction | 2018 |
| Amodeo Scott Ltd | Construction | 2016 |
| Amon Software Ltd | Manufacturing | 2022 |
| Amonfashion Ltd | Other services | 2025 |
| Amonit Ltd | Transport & logistics | 2023 |
| Amor 25 Limited | Information & communication | 2026 |
| Amor Access Care Ltd | Health & social care | 2025 |
| Amor Galvanizing Services Limited | Construction | 2021 |
| Amorebk Ltd | Wholesale & retail | 2019 |
| Amoria Foods Ltd | Hospitality | 2020 |
| Amorphous Ltd | Professional & scientific | 2020 |
| Amos Estate Agents Ltd | Real estate | 2016 |
| Amos London Limited | Construction | 2015 |
| Amos PM Limited | Households | 2022 |
| Amos Projects Limited | Construction | 2005 |
| Amos Property Services Ltd | Real estate | 2019 |
| Amoud Sound Ltd | Information & communication | 2021 |
| Amoun Ltd | Professional & scientific | 2021 |
| Amoura Family Ltd | Wholesale & retail | 2019 |
| Amoura Group London Ltd | Hospitality | 2025 |
| Amouze Ltd | Financial services | 2022 |
| Amouze Peridot Ltd | Real estate | 2024 |
| Amouze Verdant Ltd | Information & communication | 2024 |
| AMP Archery Manufactoring Products Limited | Professional & scientific | 2008 |
| AMP Electrical (Cardiff) Ltd | Construction | 2021 |
| AMP Finance Network Ltd | Administrative & support | 2023 |
| AMP Property Holdings Limited | Real estate | 2022 |
| AMP Traders UK Ltd | Administrative & support | 2019 |
| Ampet Products LLP | | 2013 |
| Ample Commodities Ltd | Wholesale & retail | 2019 |
| Amplifi Source Ltd | Professional & scientific | 2025 |
| Amplyfi Ltd | Information & communication | 2015 |
| Ampola Trade PC | | 2019 |
| Amps Group Ltd | Wholesale & retail | 2024 |
| Amputee Solutions Ltd | Administrative & support | 2018 |
| Ampyra Ltd | Wholesale & retail | 2025 |
| AMR Building and Carpentry Ltd | Construction | 2019 |
| AMR Software Ltd | Information & communication | 2015 |
| AMR Traffic Management Limited | Public administration | 2018 |
| Amrap Limited | Real estate | 2014 |
| Amrdc Associates Ltd | Professional & scientific | 2020 |
| Amrec Solutions Limited | Administrative & support | 2019 |
| Amreenpharma Ltd | Wholesale & retail | 2021 |
| Amrf Estates Ltd | Real estate | 2025 |
| Amrik SINGH1 Ltd | Construction | 2023 |
| Amrivest Limited | Financial services | 2026 |
| Amro Industrial Solutions Ltd | Wholesale & retail | 2025 |
| Amrock Electrical Ltd | Construction | 2019 |
| Amrwdion Ltd | Professional & scientific | 2024 |
| AMS Cardiff Ltd | Real estate | 2025 |
| AMS Logistics Ltd | Wholesale & retail | 2017 |
| AMS Security Events Ltd | Administrative & support | 2015 |
| AMS South West Limited | Construction | 2018 |
| AMS78 Ltd | Financial services | 2025 |
| Amsd Retail Ltd | Wholesale & retail | 2015 |
| Amser Holdings Limited | Financial services | 2021 |
| Amser Projects Limited | Construction | 2022 |
| Amser Renewables Limited | Construction | 2022 |
| Amsh Distribution Limited | Wholesale & retail | 2025 |
| Amsham Limited | Wholesale & retail | 2023 |
| Amso Healthcare Limited | Health & social care | 2020 |
| Amsord Limited | Extraterritorial | 2016 |
| Amss Holdings Ltd | Real estate | 2025 |
| Amsta Commerce Ltd | Wholesale & retail | 2025 |
| Amstren Equipment Limited | Wholesale & retail | 2025 |
| Amstren Limited | Real estate | 2025 |
| AMT Property Developments Ltd | Real estate | 2024 |
| Amtkor Limited | Information & communication | 2024 |
| Amtrac Ltd | Wholesale & retail | 2023 |
| Amuda Ltd | Wholesale & retail | 2019 |
| AMV Projects UK Limited | Construction | 2019 |
| AMY Adams Clinical Aesthetics Ltd | Other services | 2022 |
| AMY Shocker Consulting Ltd | Education | 2015 |
| Amycamy Transport Limited | Transport & logistics | 2023 |
| Amyra Ltd | Professional & scientific | 2025 |
| Amyrasingh Ltd | Hospitality | 2025 |
| Amys Kitchen (Kelly) Ltd | Hospitality | 2025 |
| Amyza Trades Limited | Transport & logistics | 2026 |
| AMZ Alsace Ltd | Wholesale & retail | 2025 |
| AMZ Constructors Ltd | Construction | 2016 |
| AMZ Project Ltd | Construction | 2013 |
| AMZ Supply Ltd | Wholesale & retail | 2020 |
| Amzac Estates Limited | Real estate | 2018 |
| Amzdoge Financial Services Limited | Financial services | 2022 |
| Amzs Consulting Limited | Administrative & support | 2023 |
| AN & Co Holdings Ltd | Health & social care | 2025 |
| AN Agency UK Ltd | Information & communication | 2024 |
| AN Easystore Ltd | Wholesale & retail | 2026 |
| AN Ecommerce Ltd | Wholesale & retail | 2025 |
| AN Lounge Ltd | Hospitality | 2025 |
| AN Prime Properties Limited | Real estate | 2024 |
| AN Properties Ltd | Real estate | 2010 |
| AN Property Ventures Limited | Real estate | 2025 |
| AN Staffing Solutions Ltd | Administrative & support | 2021 |