| Amosu Robinshaw Ltd | Professional & scientific | 2010 |
| Amour Cleaning Ltd | Administrative & support | 2017 |
| Amour Homes Ltd | Real estate | 2025 |
| AMP House Educational Centre Limited | Education | 2024 |
| AMP Management Solutions Ltd | Professional & scientific | 2014 |
| AMP Marketinguk Limited | Wholesale & retail | 2015 |
| Ampharm Limited | Wholesale & retail | 1970 |
| Amphlett IT Consultancy Ltd | Information & communication | 2013 |
| Ample Exchange (Ampl-Ex) Engineering Solutions Ltd | Professional & scientific | 2019 |
| Amplify Global Limited | Professional & scientific | 2024 |
| Amport Road Residents Association Limited | Households | 2011 |
| Amprako Autos Ltd | Administrative & support | 2023 |
| Amprako Studio Ltd | Professional & scientific | 2022 |
| Amps AV Solutions Limited | Information & communication | 2015 |
| Amruta Consultancy Services Ltd | Information & communication | 2021 |
| AMS Antiques Ltd | Wholesale & retail | 2011 |
| AMS Dental Ltd | Health & social care | 2021 |
| Amss Properties Ltd | Real estate | 2025 |
| Amvex Trading Ltd | Wholesale & retail | 2023 |
| Amvex Services Ltd | Administrative & support | 2022 |
| Amvr Limited | Real estate | 2025 |
| AMY Adams Homecare UK Limited | Health & social care | 2015 |
| AMY Brown Properties Ltd | Real estate | 2022 |
| Amyes Limited | Wholesale & retail | 2014 |
| AMZ Global Consultant Ltd | Professional & scientific | 2026 |
| Amzee Products Limited | Wholesale & retail | 2020 |
| AN 11 Limited | Manufacturing | 2024 |
| AN Caterers Limited | Hospitality | 2019 |
| AN Landmark Estates Limited | Real estate | 2015 |
| AN Logics Limited | Information & communication | 2026 |
| AN Medica Ltd | Professional & scientific | 2023 |
| AN Office Option Limited | Administrative & support | 1999 |
| AN Traders Surrey Limited | Hospitality | 2023 |
| ANA Cleaning Services Ltd | Administrative & support | 2019 |
| ANA Romero Ltd | Information & communication | 2025 |
| Anagenesis Medical Aesthetics Ltd. | Wholesale & retail | 2026 |
| Anali Resources Limited | Transport & logistics | 2005 |
| Analytics to Action Ltd | Professional & scientific | 2025 |
| Analytix Organica Ltd | Wholesale & retail | 2025 |
| Anancrest Limited | Health & social care | 2017 |
| Anand Lodge Pembury Hotel Limited | Hospitality | 2017 |
| Anangola Community | Other services | 2026 |
| Anaspel Investments Limited | Financial services | 2021 |
| Anastasis Investments Limited | Real estate | 2019 |
| Anatole Management Limited | Households | 1970 |
| Anavo Motors Ltd | Wholesale & retail | 2025 |
| Anbessa Property Management Ltd | Real estate | 2020 |
| Anchor Capital & Partners Ltd | Wholesale & retail | 2016 |
| Anchor Energy Resources & Logistics Company Ltd | Manufacturing | 2025 |
| Anchor Field Management Ltd | Households | 2020 |
| Anchor Support Group Ltd | Health & social care | 2025 |
| Anchorside Close RTM Company Limited | Households | 2010 |
| Ancient Construction Ltd | Construction | 2019 |
| Andall Enterprises Limited | Professional & scientific | 2012 |
| Anderson Associates (Surveying) Limited | Professional & scientific | 2003 |
| Anderson House Residents Association Limited | Households | 1982 |
| Anderson, Wilde & Harris Limited | Real estate | 1995 |
| Andiamo (East Grinstead) Limited | Hospitality | 2023 |
| Andolite Limited | Manufacturing | 2001 |
| Andrade (Restaurants) Limited | Administrative & support | 2015 |
| Andre Thomas Real Estate Ltd | Real estate | 2025 |
| Andrea's Building Services Ltd | Construction | 2011 |
| Andrea.Aud Ltd | Health & social care | 2020 |
| Andrew Court Limited | Households | 2003 |
| Andrew George Humroy Investments Ltd | Financial services | 2015 |
| Andrews Capital Group Limited | Financial services | 2026 |
| Andrews Gate Residents Company Limited | Households | 2012 |
| Andrews Outsourcing and Support Services Limited | Administrative & support | 2024 |
| Andron Property Ltd | Real estate | 2023 |
| Andronicas Coffee Co. Limited | Wholesale & retail | 1979 |
| Andronicas Holdings Limited | Financial services | 2011 |
| Andronicas World of Coffee Limited | Professional & scientific | 1997 |
| Andy Henderson XYZ Limited | Professional & scientific | 2025 |
| Andy Landscaping Driveways Limited | Construction | 2024 |
| Aneko Consulting Services Limited | Professional & scientific | 2005 |
| Anerley Limited | Real estate | 2017 |
| Anext Solution Ltd | Wholesale & retail | 2026 |
| Anfal Ltd | Other services | 2023 |
| Anfilms Ltd | Information & communication | 2022 |
| ANG Window & Curtain Wall Installation Ltd | Construction | 2023 |
| ANG Building Supplies Ltd | Wholesale & retail | 2021 |
| Angel & Chakra Gifts Ltd | Wholesale & retail | 2024 |
| Angel 98 Ltd | Hospitality | 2025 |
| Angel Court RMC Limited | Households | 2006 |
| Angel George Street Limited | Other services | 2024 |
| Angel Healing & Gifts Ltd | Wholesale & retail | 2024 |
| Angel Hill Court Management Company Limited | Real estate | 1997 |
| Angel Khan Foods Ltd | Hospitality | 2022 |
| Angel Meadow Management (NO.2) Limited | Households | 2006 |
| Angel Solutions (UK) Ltd | Administrative & support | 2009 |
| Angel Solutions Community Care Limited | Health & social care | 2017 |
| Angel Whitgift Limited | Other services | 2024 |
| Angela E Phillips Limited | Other services | 2021 |
| Angelcross Limited | Households | 1988 |
| Angelo Calvi & Partners Ltd | Professional & scientific | 2016 |
| Angelo's Dream Gardens Ltd. | Administrative & support | 2011 |
| Angelot Flooring Ltd | Construction | 2008 |
| Angiekiss Ltd | Wholesale & retail | 2025 |
| Angle Accounting Services Limited | Professional & scientific | 2012 |
| Anglin Jarrett Films Ltd | Information & communication | 2023 |