| Anson Danes Ltd | Wholesale & retail | 2024 |
| Anstee Services Ltd | Agriculture & fishing | 2016 |
| Anstey Balti Limited | Hospitality | 2019 |
| Anstey Cars and Airport Transfers Ltd | Transport & logistics | 2021 |
| Anstey Cropston Limited | Hospitality | 2021 |
| Anstey Healthcare Ltd | Health & social care | 2020 |
| Anstey Homecare Ltd | Health & social care | 2025 |
| Anstey House Ltd | Real estate | 2022 |
| Anstey RFC Limited | Arts & recreation | 2010 |
| Anstige Management Company Limited | Real estate | 2008 |
| Anstiss Ltd | Construction | 2015 |
| Answernav Ltd | Information & communication | 2023 |
| Answers in Genesis Uk/Europe | Other services | 1993 |
| Answers to Business Limited | Professional & scientific | 2009 |
| ANT Automotive Ltd | Wholesale & retail | 2025 |
| ANT Capital Ltd | Real estate | 2022 |
| ANT Express Ltd | Transport & logistics | 2025 |
| Antalano Ltd | Transport & logistics | 2019 |
| Antalya Kitchen Limited | Hospitality | 2019 |
| Antalya Mangal Ltd | Hospitality | 2024 |
| Antartic Investments Ltd | Real estate | 2022 |
| Antb Foods Limited | Hospitality | 2025 |
| Anthem Properties Ltd | Real estate | 2023 |
| Anthony and Andy Ltd | Health & social care | 2025 |
| Anthony Doores Safety Solutions Limited | Professional & scientific | 2024 |
| Anthony Hill Designs Limited | Manufacturing | 2022 |
| Antiscuff Ltd | Wholesale & retail | 2022 |
| Antler Construction & Property Development Ltd | Construction | 2025 |
| Antone Displays Holdings Limited | Manufacturing | 2017 |
| Antone Displays Limited | Manufacturing | 1970 |
| Antoni Transport Ltd | Transport & logistics | 2014 |
| Antonov Technologies UK Ltd | Wholesale & retail | 2026 |
| Antony Sutton Ltd | Financial services | 2022 |
| Antophia Ltd | Real estate | 2021 |
| Antrans Ltd | Transport & logistics | 2016 |
| Antrum Energy Trilemma Ltd | Professional & scientific | 2025 |
| ANU Import & Export Ltd | Wholesale & retail | 2019 |
| Anu's Beauty Ltd | Other services | 2026 |
| Anudeep Properties Ltd | Wholesale & retail | 2024 |
| Anuncia Limited | Information & communication | 2015 |
| Anvil Machinery Safety Consultants Ltd | Professional & scientific | 2026 |
| Anvir Properties Limited | Real estate | 2018 |
| Anvishrix Ltd | Information & communication | 2026 |
| Anwar Couriers Ltd | Transport & logistics | 2026 |
| Anwar Cube Ltd | Wholesale & retail | 2020 |
| Anwar Property Ltd | Real estate | 2025 |
| Anwita 26 Enterprise Limited | Hospitality | 2023 |
| Anwita Properties Ltd | Real estate | 2025 |
| ANWITA02 Enterprise Limited | Hospitality | 2024 |
| Anxiety Bgone Ltd | Extraterritorial | 2022 |
| ANY Car ANY Part Ltd | Wholesale & retail | 2024 |
| Anyemba Group Limited | Information & communication | 2021 |
| Anypcfixed Ltd | Information & communication | 2018 |
| Anything Meds Limited | Wholesale & retail | 2023 |
| ANZ Motors Ltd | Wholesale & retail | 2018 |
| Anzala Ltd | Health & social care | 2023 |
| AO & Sons Property Investments Limited | Real estate | 2014 |
| AO Healthcare Services Ltd | Health & social care | 2023 |
| AO Procurement Services Limited | Administrative & support | 2015 |
| AOB (Leicester) Ltd | Education | 2015 |
| AOB IT Solutions Limited | Information & communication | 2021 |
| Aoia Ltd | Health & social care | 2023 |
| Aola Limited | Other services | 2026 |
| Aons Healthcare Solution Ltd | Administrative & support | 2026 |
| Aot.Ai Ltd | Information & communication | 2025 |
| AOX Group Ltd | Construction | 2024 |
| AP Autos Leicester Ltd | Wholesale & retail | 2018 |
| AP Bargains Ltd | Wholesale & retail | 2025 |
| AP Building & Groundworks Ltd | Construction | 2021 |
| AP Catering Ltd | Hospitality | 2020 |
| AP Codecraft Ltd | Information & communication | 2025 |
| AP Data Solutions Ltd | Information & communication | 2026 |
| AP Gypsum Ltd | Construction | 2024 |
| AP Home Developments Ltd | Construction | 2023 |
| AP JC Bespoke Joinery Ltd | Manufacturing | 2020 |
| AP Luxury Homes Limited | Real estate | 2025 |
| AP Properties Limited | Real estate | 2026 |
| AP Property Limited | Real estate | 2015 |
| AP Roofing Services Ltd | Construction | 2023 |
| AP SP Enterprises Limited | Wholesale & retail | 2017 |
| AP Trading Leicester Ltd | Wholesale & retail | 2017 |
| AP Transport Services Ltd | Transport & logistics | 2022 |
| AP Vehicle Repairs Ltd | Wholesale & retail | 2024 |
| AP Vision Ltd | Professional & scientific | 2022 |
| APA Leisure Limited | Hospitality | 2003 |
| APA Ways Ltd | Other services | 2018 |
| Apac 3L UK Limited | Wholesale & retail | 2022 |
| Apad Tech Ltd | Wholesale & retail | 2024 |
| Apartmint Limited | Real estate | 2017 |
| Apatura IT Consultants Ltd | Information & communication | 2018 |
| APB (Leicester) LLP | | 2010 |
| APB (Nottingham) Limited | Financial services | 2013 |
| APB Surveying Ltd | Construction | 2013 |
| Apeiron Management Consultancy Limited | Professional & scientific | 2024 |
| Aperio Research Limited | Professional & scientific | 2017 |
| Aperture Dynasty Ltd | Manufacturing | 2025 |
| Apex - OM Limited | Real estate | 2008 |
| Apex Airguns Limited | Manufacturing | 2018 |
| Apex Aura Digital Ltd | Wholesale & retail | 2025 |
| Apex Autoworks Solutions Ltd | Wholesale & retail | 2025 |