| AP Fit FAM Ltd | Arts & recreation | 2024 |
| AP Maintenance Limited | Construction | 2020 |
| Apache Consultants Ltd | Professional & scientific | 2019 |
| Apee Construction Limited | Construction | 2024 |
| Apeloa Hongkong Limited | Administrative & support | 2023 |
| Aperture Optics Ltd | Health & social care | 2018 |
| Apetitoso Ltd | Wholesale & retail | 2023 |
| Apex Consult and Build Ltd | Construction | 2019 |
| Apex KK Ltd | Real estate | 2022 |
| Apexten Limited | Real estate | 2025 |
| Appliix Ltd | Wholesale & retail | 2026 |
| Approved Roofing Group Ltd | Construction | 2024 |
| Apps Network Limited | Information & communication | 2025 |
| Apts UK Global Ltd | Information & communication | 2025 |
| Apvt Web PVT. Ltd. | Hospitality | 2022 |
| Aqsa Design & Build Ltd | Construction | 2023 |
| Aqua IT Limited | Information & communication | 2022 |
| Aqua Roofing and Building Limited | Construction | 2013 |
| AR Dodd Ltd | Information & communication | 2007 |
| Araab Consulting Limited | Professional & scientific | 2017 |
| Arachem Health Limited | Wholesale & retail | 2013 |
| Arauk Capital Ltd | Administrative & support | 2019 |
| ARB Marine Consultants Ltd | Other services | 2020 |
| ARB Projects Limited | Professional & scientific | 2008 |
| ARB Properties (UK) Ltd | Construction | 2011 |
| ARC Fibrous Plastering Ltd | Construction | 2013 |
| ARC11 Ltd | Financial services | 2023 |
| Arcadia Equity Ltd | Real estate | 2026 |
| Archer Insurance Services Limited | Financial services | 1991 |
| Architecture Everything Ltd | Professional & scientific | 2021 |
| Archos Media Ltd | Information & communication | 2021 |
| Arden House Limited | Professional & scientific | 2002 |
| Aremecy Ltd | Professional & scientific | 2019 |
| Arenico Imports Ltd | Wholesale & retail | 2026 |
| Arens Management Limited | Hospitality | 2022 |
| Arete Building Solutions Ltd | Construction | 2016 |
| Areteia Limited | Education | 2025 |
| Argalon Technologies Ltd | Information & communication | 2019 |
| Argonaut Tax Consultancy Limited | Professional & scientific | 2012 |
| Aria Accountants Ltd | Professional & scientific | 2017 |
| Aria Group Holdings Ltd | Information & communication | 2017 |
| Aria Motor Group Limited | Wholesale & retail | 2026 |
| Ariana Capital Global Ltd | Financial services | 2026 |
| ARK Estate Holdings Limited | Real estate | 2018 |
| ARK Project Consultants Limited | Information & communication | 2019 |
| ARK Projects Consultants Ltd | Information & communication | 2022 |
| Arka Studios Ltd | Wholesale & retail | 2023 |
| Arkley Roofing & Building Limited | Construction | 2023 |
| Arkley Roofing Limited | Construction | 2025 |
| Arkwest Limited | Information & communication | 2007 |
| Arlem Construction Limited | Construction | 2020 |
| Armazém Açaí Ltd | Wholesale & retail | 2019 |
| Arminian Ltd | Real estate | 2024 |
| Armour Stone Ltd | Construction | 2025 |
| Armstrong Engineering Limited | Wholesale & retail | 2022 |
| Arogyapasah Ltd | Hospitality | 2022 |
| Aroma OIL Enterprises Ltd | Wholesale & retail | 2020 |
| Arslan Financial Services Ltd | Financial services | 2014 |
| Artami International Trade Co., Ltd. | Extraterritorial | 2019 |
| Artand Properties Ltd | Real estate | 2026 |
| Artis & Sash Ltd | Construction | 2025 |
| Artistic CRE8TIV Limited | Wholesale & retail | 2020 |
| Artperuk CIC | Arts & recreation | 2023 |
| ARV Property Limited | Real estate | 2016 |
| Arvin-Uk Limited | Real estate | 2020 |
| Arya Consulting Private Limited | Professional & scientific | 2025 |
| Asato Limited | Information & communication | 2006 |
| ASB Studio Ltd | Arts & recreation | 2026 |
| Ascent Commercial Services Limited | Professional & scientific | 2021 |
| Ascose Investments Holding PLC | Manufacturing | 2019 |
| Asd-Adhd-Assessors Ltd | Health & social care | 2020 |
| Aseja Estates Ltd | Hospitality | 2026 |
| Asgr Consulting Ltd | Professional & scientific | 2023 |
| ASH Bash Properties Limited | Real estate | 2020 |
| ASH Villa Ltd | Real estate | 2022 |
| Ashanti Partnerships Ltd | Construction | 2026 |
| Ashburns Accountants Ltd | Professional & scientific | 2010 |
| Ashiram Limited | Health & social care | 2026 |
| Ashleighclaudine Hairdressing Ltd | Other services | 2024 |
| Ashton - MAY Healthcare Ltd | Financial services | 2012 |
| Askia Consulting Limited | Professional & scientific | 2019 |
| Asmi Ltd | Administrative & support | 2018 |
| Asml Tax & Accounting Limited | Professional & scientific | 2013 |
| Aspace Construction Limited | Construction | 2016 |
| Aspect Property Services Limited | Construction | 2001 |
| Aspire GH Ltd | Wholesale & retail | 2020 |
| Aspire Progress Excel CIC | Education | 2025 |
| Asps Industries Ltd | Real estate | 2024 |
| ASR Human Resources Solutions Limited | Administrative & support | 2006 |
| Asrr Services Ltd | Wholesale & retail | 2023 |
| Asset Reclad Ltd | Construction | 2026 |
| Assets and Trade Medical LLP | | 2012 |
| Assured Assets Ltd | Real estate | 2022 |
| Astellar Solutions Limited | Extraterritorial | 2023 |
| Astle Financial Planning Ltd | Professional & scientific | 2020 |
| Astra Consultancy Ltd | Administrative & support | 2025 |
| Astral Freehold Ltd | Households | 2026 |
| Astro 1 Limited | Arts & recreation | 2004 |
| ATA Supplies Ltd | Wholesale & retail | 2018 |
| Atauri Solutions Ltd | Information & communication | 2025 |