| APS Information Systems Limited | Administrative & support | 2011 |
| APS Invest Limited | Real estate | 2021 |
| APS Logisticslondon Ltd | Transport & logistics | 2024 |
| APS Rental Limited | Real estate | 2025 |
| APV One Ltd | Hospitality | 2024 |
| APX Marketing Ltd | Other services | 2026 |
| AQ Consulting Accountants Limited | Information & communication | 2023 |
| AQ Driving School Ltd | Education | 2025 |
| AQ Financial Limited | Professional & scientific | 2015 |
| Aqad Corporations Ltd | Wholesale & retail | 2025 |
| Aqconnect Ltd. | Information & communication | 2014 |
| Aqeel Ahmed Online Limited | Wholesale & retail | 2026 |
| AQS Logistics Ltd | Transport & logistics | 2025 |
| Aqua Cloud Consultancy Services Limited | Information & communication | 2012 |
| Aqua Properties Limited | Real estate | 2004 |
| Aquamarine Limited | Wholesale & retail | 2015 |
| Aquanile UK Limited | Information & communication | 2003 |
| Aquarela Limited | Information & communication | 2006 |
| Aquilla ROW Properties Ltd | Real estate | 2023 |
| Aquilla ROW Property Management Ltd | Real estate | 2025 |
| Aquiship Limited | Transport & logistics | 2020 |
| Aqwaa Limited | Professional & scientific | 2018 |
| AR Assured Investmant Limited | Financial services | 2026 |
| AR Assured Investment Limited | Real estate | 2023 |
| AR Autohaus Ltd | Wholesale & retail | 2024 |
| AR Contracting Ltd | Information & communication | 2012 |
| AR Doaba Construction Ltd | Construction | 2026 |
| AR Education Consultants Ltd | Education | 2017 |
| AR Financials Ltd | Professional & scientific | 2021 |
| AR Furnishing Ltd | Wholesale & retail | 2023 |
| AR Global Services Limited | Other services | 2015 |
| AR Global Ventures Ltd | Administrative & support | 2025 |
| AR Group Chheena Limited | Wholesale & retail | 2025 |
| AR Holdings London Ltd | Construction | 2020 |
| AR London Logistics Ltd | Transport & logistics | 2021 |
| AR Netcam Limited | Administrative & support | 2025 |
| AR Premier Investments Ltd | Real estate | 2021 |
| AR Private Limited | Wholesale & retail | 2015 |
| AR Sandhu Investment Ltd | Financial services | 2022 |
| AR Square Ltd | Wholesale & retail | 2026 |
| AR Trading UK Ltd | Transport & logistics | 2019 |
| Ar&K Limited | Professional & scientific | 2013 |
| Ar-Rayyan Ltd | Hospitality | 2026 |
| AR97 Express Ltd | Information & communication | 2022 |
| ARA Beverages Ltd | Wholesale & retail | 2022 |
| ARA Comms UK Ltd | Construction | 2018 |
| ARA WA Ltd | Wholesale & retail | 2019 |
| Araa Investments Limited | Real estate | 2024 |
| Araaz Ltd | Wholesale & retail | 2024 |
| Arab Allure Ltd | Hospitality | 2022 |
| Arab Scientific Community Organisation | Other services | 2009 |
| Arabella Hair and Beauty Ltd | Other services | 2018 |
| Arabian Lounge Limited | Hospitality | 2024 |
| Arabian Musk Ltd | Wholesale & retail | 2024 |
| Arabian Sports Cafe & Lounge Ltd | Hospitality | 2015 |
| Arabian Wardrobe Limited | Wholesale & retail | 2016 |
| Arabianmotors Limited | Wholesale & retail | 2023 |
| Araf Real Estate Limited | Real estate | 2023 |
| Arafa Real Estate Limited | Real estate | 2024 |
| Arafah Ltd | Real estate | 2024 |
| Arain Group Limited | Real estate | 2017 |
| Arain Services Limited | Administrative & support | 2026 |
| Araish Collection Ltd | Wholesale & retail | 2026 |
| Araislam Ltd | Wholesale & retail | 2024 |
| Arakan Rohingya National Organisation | Health & social care | 2015 |
| Araliya Limited | Real estate | 2021 |
| Aramas Ltd | Wholesale & retail | 2024 |
| Aran C & J Limited | Construction | 2012 |
| Araniyas Limited | Wholesale & retail | 2020 |
| Araq Ltd | Real estate | 2023 |
| Aras Services Limited | Health & social care | 2026 |
| Arasaka Corp Ltd | Information & communication | 2026 |
| Arasasingham Ltd | Health & social care | 2023 |
| Arasella Ltd | Hospitality | 2023 |
| ARB Therma Ltd | Construction | 2025 |
| Arbab Services Ltd | Transport & logistics | 2019 |
| Arbab Trading Limited | Wholesale & retail | 2025 |
| Arbery E16 Ltd | Real estate | 2019 |
| Arbs Creative Ltd | Wholesale & retail | 2021 |
| Arbtradersignals Ltd | Education | 2015 |
| Arbyd Investments Ltd | Financial services | 2021 |
| Arbyt Ltd | Professional & scientific | 2023 |
| ARC Engineering Ltd | Professional & scientific | 2022 |
| Arcadia Services Ltd | Other services | 2025 |
| Arcane Holding Limited | Professional & scientific | 2023 |
| Arch Construction Services Ltd | Construction | 2018 |
| Arch Path Training Ltd | Education | 2026 |
| Archadius Global UK Ltd | Professional & scientific | 2023 |
| Archam Ltd | Construction | 2019 |
| Archana Sathyanarayana Ltd | Administrative & support | 2024 |
| Archbold Solicitors Limited | Professional & scientific | 2016 |
| Archco Developments Limited | Construction | 2009 |
| Archco Interiors Limited | Construction | 2010 |
| Arche Homes Ltd | Real estate | 2017 |
| Archeo Ltd | Wholesale & retail | 2023 |
| Archfield Limited | Real estate | 2000 |
| Archibald Property Maintenance Ltd | Administrative & support | 2026 |
| Archie & Aaliyah Ltd | Hospitality | 2019 |
| Archies Properties Consultancy Ltd | Real estate | 2023 |
| Archies Supermarket Ltd | Wholesale & retail | 2023 |