| Annandale Estates Ltd | Real estate | 2016 |
| Anna’S Cupcakery Ltd | Wholesale & retail | 2023 |
| Anneka Real Estate Limited | Construction | 2019 |
| Annekia Ltd | Professional & scientific | 2018 |
| Annemary International Ltd | Transport & logistics | 2023 |
| Annetts Property & Finance Limited | Financial services | 2023 |
| Annex Valves Limited | Extraterritorial | 2014 |
| Annie Group Limited | Financial services | 2023 |
| Annni Limited | Real estate | 2024 |
| Annora Limited | Financial services | 2012 |
| Annsis Properties Limited | Real estate | 2022 |
| Anntiquity Ltd | Administrative & support | 2023 |
| ANO Services Limited | Health & social care | 2024 |
| ANO Simtech Ltd | Professional & scientific | 2025 |
| Anointing Fire Catholic Ministries, UK (Afcm,Uk) | Other services | 2013 |
| Anonymous Tips Ltd | Administrative & support | 2026 |
| Anoyama Limited | Other services | 2025 |
| ANQ Enterprise Limited | Transport & logistics | 2019 |
| ANR Welders Ltd | Construction | 2025 |
| Anro-Services Ltd | Transport & logistics | 2012 |
| Ansa Scorpio Limited | Health & social care | 2010 |
| Ansar Security Ltd | Administrative & support | 2024 |
| Ansh Freight Services Limited | Transport & logistics | 2025 |
| Anshveer Store Ltd | Wholesale & retail | 2021 |
| Anslow Bars Ltd | Hospitality | 2026 |
| Anson Technology Limited | Information & communication | 1996 |
| Anss Limited | Wholesale & retail | 2018 |
| Anss Locums Limited | Health & social care | 2019 |
| Ansty Car Wash Limited | Administrative & support | 2025 |
| Ant-Eng Ltd | Other services | 2025 |
| Antalya Kebab Express Ltd | Hospitality | 2025 |
| Antaq Dynamic Solutions Limited | Wholesale & retail | 2010 |
| Antaraskitchen Ltd | Wholesale & retail | 2025 |
| Anthony Bird Consulting Limited | Professional & scientific | 2017 |
| Anthony D Evans (Insurance Brokers) & Co Ltd | Financial services | 2015 |
| Antique Centre Coventry Ltd | Wholesale & retail | 2025 |
| Antonia Sofia Cleaning Ltd | Administrative & support | 2025 |
| Antonino Cuffaro Limited | Professional & scientific | 2020 |
| Antonio Radu Ltd | Transport & logistics | 2026 |
| Anvair Ltd | Transport & logistics | 2015 |
| Anvika Foods Ltd | Wholesale & retail | 2025 |
| Anvil Gardens Freehold Ltd | Households | 2021 |
| Anvil Gardens Management Ltd | Households | 2021 |
| Anvista Ltd | Wholesale & retail | 2025 |
| Anvolve Enterprise Solutions Limited | Information & communication | 2009 |
| Anyflo Ltd | Wholesale & retail | 2018 |
| Anything Property Limited | Construction | 2023 |
| Anytime Clean Limited | Administrative & support | 2025 |
| Anzure Ltd | Wholesale & retail | 2024 |
| AO Group Ltd | Financial services | 2015 |
| AOD Global Limited | Health & social care | 2024 |
| Aoki Property Ltd | Real estate | 2025 |
| AOM Cars Limited | Wholesale & retail | 2019 |
| Aona Ltd | Wholesale & retail | 2019 |
| AP 4 Estates Ltd | Real estate | 2025 |
| AP Estates & Lettings Limited | Real estate | 2025 |
| AP Industries Ltd | Wholesale & retail | 2025 |
| AP Link Ltd | Information & communication | 2026 |
| AP Practice Limited | Financial services | 2017 |
| AP Racing Limited | Manufacturing | 1999 |
| AP Rail Isolations Ltd | Construction | 2018 |
| AP SD Eighteen Limited | Wholesale & retail | 2025 |
| AP Technology Holdings Limited | Financial services | 2017 |
| AP Trading Coventry Limited | Wholesale & retail | 2017 |
| AP UK Retail Limited | Wholesale & retail | 2019 |
| APA Mini Market Ltd | Wholesale & retail | 2024 |
| Apaa Distributors Ltd | Wholesale & retail | 2025 |
| Apaa Properties Ltd | Real estate | 2025 |
| Apachiy Ltd | Information & communication | 2024 |
| Apaj Trading LLP | | 2024 |
| Apakama Technologies Ltd | Information & communication | 2021 |
| Aparclo Ltd | Wholesale & retail | 2025 |
| Apartments Last Minute .Co.Uk Limited | Hospitality | 2008 |
| Apartments Limited | Real estate | 2007 |
| APD Carpets Ltd | Administrative & support | 2017 |
| APD Solutions Ltd | Real estate | 2026 |
| Apec Systems Limited | Manufacturing | 2007 |
| Aperture Prime Photography Ltd | Professional & scientific | 2026 |
| Aperture Property Investments Limited | Real estate | 2018 |
| Aperture Property Limited | Real estate | 2017 |
| Apex 81 Limited | Construction | 2017 |
| Apex Active Fitness Ltd | Arts & recreation | 2019 |
| Apex and Cornerstone Homes Limited | Real estate | 2026 |
| Apex Built Supplies Limited | Wholesale & retail | 2025 |
| Apex Clean Group Ltd | Administrative & support | 2026 |
| Apex Drive Solutions Ltd | Information & communication | 2025 |
| Apex Education and Engineering Ltd | Professional & scientific | 2025 |
| Apex Firm Limited | Other services | 2024 |
| Apex Forge Ltd | Wholesale & retail | 2026 |
| Apex Fortune Trading Ltd | Wholesale & retail | 2025 |
| Apex Global Recruitment Ltd | Construction | 2025 |
| Apex Healing Ltd | Wholesale & retail | 2023 |
| Apex IT Consultancy Limited | Information & communication | 2014 |
| Apex IT Partners Ltd | Information & communication | 2026 |
| Apex Lane Ltd | Transport & logistics | 2025 |
| Apex Medical Locums Limited | Health & social care | 2017 |
| Apex Meds Ltd | Extraterritorial | 2023 |
| Apex Renovations Group Ltd | Construction | 2025 |
| Apex Smart Solutions Limited | Information & communication | 2025 |
| Apex Strategic Holdings Limited | Financial services | 2023 |