| Annuo International Trade Co., Ltd | Extraterritorial | 2019 |
| Anointed 5 Enterprise Limited | Real estate | 2017 |
| Anserk Limited | Wholesale & retail | 2025 |
| Anunnaki Transport Limited | Transport & logistics | 2020 |
| Anxin Shopping Co., Ltd | Information & communication | 2026 |
| Anyco UK Limited | Wholesale & retail | 2025 |
| Anydiy Auto Co., Ltd | Extraterritorial | 2015 |
| Anything Studio International Ltd | Extraterritorial | 2016 |
| Anywin Co., Limited | Agriculture & fishing | 2007 |
| Anzicc Technology Co., Ltd | Wholesale & retail | 2021 |
| Aobay Medical Treatment Ltd | Manufacturing | 2025 |
| AOD Contracts Limited | Construction | 2016 |
| Aomate Technology Limited | Wholesale & retail | 2023 |
| Aone Industrial Co., Ltd | Extraterritorial | 2014 |
| Aopuno (UK) International Import & Emport Ltd | Extraterritorial | 2020 |
| Aosu Life UK Ltd | Wholesale & retail | 2025 |
| AP Rope Access Ltd | Administrative & support | 2022 |
| Ap&D Ltd | Professional & scientific | 2016 |
| Apacare Group Limited | Extraterritorial | 2020 |
| APE Capital Ltd | Financial services | 2022 |
| APE Culture Brand Alliance Limited | Extraterritorial | 2020 |
| Aperture Live Limited | Professional & scientific | 2025 |
| Apex Close (Beckenham) Limited | Households | 1982 |
| Apex Protection Limited | Other services | 2018 |
| Apexs Tech Limited | Manufacturing | 2016 |
| Aphrodite Weddings Ltd | Administrative & support | 2013 |
| API Leading Ltd | Extraterritorial | 2007 |
| Apipro Co., Limited | Wholesale & retail | 2026 |
| APL Business Solutions Limited | Professional & scientific | 2013 |
| Aplasco Industry Group Co., Ltd | Extraterritorial | 2021 |
| Aplegen Co., Ltd | Extraterritorial | 2024 |
| Apol Limited | Financial services | 2015 |
| Apollo SA Investments Limited | Real estate | 2024 |
| Apparelremade Ltd | Wholesale & retail | 2021 |
| Appified Ltd | Information & communication | 2015 |
| Applause Tech Limited | Wholesale & retail | 2024 |
| Apple Executive Limited | Transport & logistics | 2013 |
| Appleton and Rowlinson Limited | Manufacturing | 2005 |
| Approved Contractors Limited | Construction | 2017 |
| Apricot Technology Ltd | Information & communication | 2014 |
| April's Nail Salon Ltd | Other services | 2024 |
| Apsidea Limited | Professional & scientific | 2010 |
| Aqua Elite Limited | Education | 2022 |
| Aqua Wings Technology Co., Ltd | Manufacturing | 2022 |
| Aquaticsen Limited | Manufacturing | 2024 |
| Aquelife Co., Ltd | Manufacturing | 2021 |
| Aqulapro Industry Ltd | Wholesale & retail | 2023 |
| Arand International Group Limited | Wholesale & retail | 2020 |
| Aravind Trading Limited | Wholesale & retail | 2022 |
| Arblock Information Technology Co., Ltd | Wholesale & retail | 2022 |
| ARC EHV Services Ltd | Professional & scientific | 2026 |
| Archimed Laboratories Co., Ltd | Extraterritorial | 2015 |
| Architect Zone Limited | Professional & scientific | 2009 |
| Architectural Project Unit (UK) Limited | Construction | 2025 |
| Architecture Made in Limited | Professional & scientific | 2020 |
| Archlodge Limited | Administrative & support | 2012 |
| Arcwood Court RTM Company Ltd | Households | 2020 |
| Ardor Noah Trading Co., Ltd | Information & communication | 2025 |
| Ares Marine Service Co., Ltd | Wholesale & retail | 2023 |
| Aresais International Holding Group Limited | Extraterritorial | 2019 |
| ARI Building Materials Co., Ltd | Extraterritorial | 2024 |
| Ariah Fashion Co., Ltd. | Wholesale & retail | 2025 |
| Arideal Ltd | Administrative & support | 2023 |
| Arjunson Ltd | Wholesale & retail | 2021 |
| Arkable Building Solutions Limited | Construction | 2016 |
| Armco Chemical Global Ltd | Extraterritorial | 2020 |
| Armforce Rubber Co., Ltd | Professional & scientific | 2016 |
| Armsmart Industries Ltd | Professional & scientific | 2015 |
| Arnis & Jack Construction Ltd | Construction | 2021 |
| ARO Ingersoll Rand Limited | Manufacturing | 2026 |
| ARO Wrigley Chemical Industry UK Limited | Extraterritorial | 2018 |
| Around the Clock Security Ltd | Administrative & support | 2017 |
| ARP Resources Limited | Professional & scientific | 2012 |
| Arque Golf Ltd | Wholesale & retail | 2025 |
| Art and Math Limited | Professional & scientific | 2020 |
| Art and Wort (UK) Limited | Manufacturing | 2022 |
| Art Design & Build Ltd | Construction | 2017 |
| Art Galaxy International Ltd | Extraterritorial | 2014 |
| Art HR Limited | Administrative & support | 2023 |
| Art Tactic International Co., Ltd | Extraterritorial | 2018 |
| Art-I Construction Ltd | Construction | 2026 |
| Artech Trading Co Ltd | Extraterritorial | 2015 |
| Artechnic Limited | Construction | 2020 |
| Arthur International Ltd | Extraterritorial | 2016 |
| Artinano Care Limited | Manufacturing | 2025 |
| Artiron Limited | Wholesale & retail | 2021 |
| Artisan Sunny Group Limited | Manufacturing | 2012 |
| Artisan Wigs London Ltd | Other services | 2022 |
| Artixan Ltd | Arts & recreation | 2022 |
| Artizan Marine Service Limited | Manufacturing | 2024 |
| Artkilledme Limited | Arts & recreation | 2019 |
| Arts in the Park CIC | Administrative & support | 2023 |
| Artsncraftsforu Limited | Arts & recreation | 2026 |
| Arus International Trade Limited | Manufacturing | 2025 |
| AS Globe Ltd | Construction | 2015 |
| Asan International Co., Ltd. | Extraterritorial | 2020 |
| Ascendant Trading Co., Limited | Extraterritorial | 2015 |
| Ascenta Group Limited | Extraterritorial | 2023 |
| Ascot Global (UK) Limited | Construction | 2011 |
| Ascott Beauty Clinic Beckenham Ltd | Other services | 2014 |