| Artless Limited | Wholesale & retail | 2025 |
| Arun Hooda Ltd | Administrative & support | 2023 |
| Arura Store Ltd | Wholesale & retail | 2024 |
| Arvin Autos Ltd | Wholesale & retail | 2026 |
| Arvy Construction Ltd | Construction | 2019 |
| ARY Investment Ltd | Real estate | 2021 |
| Aryan Property Holdings Ltd | Real estate | 2023 |
| Aryan UK Construction Ltd | Construction | 2020 |
| Arzl Motors Ltd | Wholesale & retail | 2019 |
| AS Brar Haulage Ltd | Transport & logistics | 2025 |
| AS Builders (London) Ltd | Construction | 2023 |
| AS Direct Limited | Wholesale & retail | 2011 |
| AS Driving Academy Limited | Education | 2025 |
| AS Interior Ltd | Construction | 2024 |
| AS Lamba Limited | Real estate | 2026 |
| AS Multani Builder Ltd | Construction | 2023 |
| AS Quick House Ltd | Real estate | 2025 |
| AS Roofing Contractors Ltd | Construction | 2024 |
| AS Sandhu Roofing&Building Ltd | Construction | 2025 |
| AS Squared Engineering Ltd | Professional & scientific | 2021 |
| As&S Builders UK Limited | Construction | 2020 |
| ASA Dhesi Ltd | Real estate | 2019 |
| Asap Growth Limited | Financial services | 2015 |
| ASB Architectural Design Limited | Professional & scientific | 2015 |
| ASB Architecture Limited | Construction | 2013 |
| ASB Auto Repairs Ltd | Wholesale & retail | 2025 |
| Ascendence Tattoo Studio Ltd | Arts & recreation | 2016 |
| Ascending Horizons Ltd | Information & communication | 2026 |
| Ascenso Tyres Global Limited | Financial services | 2023 |
| Ascent Enterprises Limited | Wholesale & retail | 2025 |
| Ascot Assets Limited | Real estate | 2017 |
| Ascot Distribution UK Ltd | Construction | 2026 |
| Ascot Vehicles Limited | Wholesale & retail | 2011 |
| Asees Building Contractors Ltd | Construction | 2023 |
| Asees Properties Ltd | Real estate | 2023 |
| ASH Entertainment Ltd | Information & communication | 2023 |
| ASH Fruits&Veg Limited | Other services | 2020 |
| ASH Hair & Beauty Limited | Other services | 2020 |
| ASH Hill Safety Solutions Ltd | Public administration | 2021 |
| ASH London Construction Limited | Construction | 2025 |
| ASH Mechanical & Electrical Services Limited | Construction | 2016 |
| ASH Mineral Consulting Limited | Professional & scientific | 2025 |
| Asha (Camberley) Ltd | Construction | 2014 |
| Asha (Feltham) UK Ltd | Real estate | 2014 |
| Asha Group (UK) Limited | Construction | 2013 |
| Asha Investments (UK) Ltd | Real estate | 2006 |
| Ashbury Real Estate Inc Ltd | Real estate | 2025 |
| Ashdeep Haulage Ltd | Transport & logistics | 2026 |
| Ashem Ltd | Real estate | 2019 |
| Ashford Assets Ltd | Real estate | 2021 |
| Ashford Finance Ltd | Real estate | 2012 |
| Ashford Food and Wine Ltd | Wholesale & retail | 2020 |
| Ashi Discount Store Ltd | Wholesale & retail | 2018 |
| Ashleen Developers Ltd | Construction | 2020 |
| Ashley Webb UK Ltd | Real estate | 2018 |
| Ashman Global Limited | Wholesale & retail | 2026 |
| Ashmanastro Investment Ltd | Real estate | 2022 |
| Ashmita Pound Shop Limited | Wholesale & retail | 2024 |
| Ashoors Design Ltd | Information & communication | 2021 |
| Ashtar Promotions Ltd | Wholesale & retail | 2012 |
| Ashveen Traders Ltd | Wholesale & retail | 2018 |
| Ashview Agency Ltd | Administrative & support | 2024 |
| Ashwani Scaffolding Ltd | Construction | 2026 |
| Ashwood Builders Merchant Ltd | Wholesale & retail | 2025 |
| Asian Cuisine London Limited | Hospitality | 2023 |
| Asian Traders Holdings Ltd | Financial services | 2023 |
| Asian Traders Limited | Wholesale & retail | 2008 |
| Asian Women Run CIC | Arts & recreation | 2025 |
| Asians Food Limited | Hospitality | 2023 |
| Asianveg Ltd | Wholesale & retail | 2021 |
| Asidhu Enterprise Ltd | Transport & logistics | 2025 |
| Asif Hyder Ltd | Professional & scientific | 2025 |
| ASK Building Contractors Ltd | Construction | 2020 |
| ASK Fashions Limited | Wholesale & retail | 2018 |
| ASK ME Builders Ltd | Construction | 2021 |
| ASL Private Ltd | Transport & logistics | 2025 |
| ASM Built and Electric Ltd | Construction | 2021 |
| ASM Hayes Traders Ltd | Wholesale & retail | 2019 |
| ASM Properties Limited | Construction | 2013 |
| ASM Rail & Civils Ltd | Construction | 2014 |
| ASM Technology Solutions Limited | Information & communication | 2017 |
| Asoa Tech Ltd | Wholesale & retail | 2025 |
| Aspira Properties Ltd | Real estate | 2025 |
| Aspire Beyond Limited | Wholesale & retail | 2021 |
| Aspire Builds Ltd | Construction | 2025 |
| Aspire Finance Group Ltd | Financial services | 2026 |
| Aspire Lifestyle Ltd | Wholesale & retail | 2021 |
| ASR Automotive Limited | Wholesale & retail | 2021 |
| ASR Consultancy Ltd | Professional & scientific | 2025 |
| Assist Plus Care Ltd | Health & social care | 2024 |
| AST Transportation Ltd | Transport & logistics | 2026 |
| Aster 11:11 Holdings Ltd | Real estate | 2023 |
| Aster Oliver Homes Limited | Real estate | 2023 |
| Aston Webb Collections Ltd | Administrative & support | 2024 |
| Astoria Consultancy Limited | Professional & scientific | 2023 |
| Astra Solutions and Logistics Ltd | Transport & logistics | 2026 |
| Astra Traders Ltd | Wholesale & retail | 2025 |
| Astrah Ltd | Real estate | 2024 |
| Astral Global Limited | Financial services | 2020 |
| Astral Technologies Limited | Professional & scientific | 2018 |