| Aryan Global Ltd | Real estate | 2026 |
| Aryan Haulage Ltd | Transport & logistics | 2025 |
| Aryana Restaurant UK Ltd | Hospitality | 2025 |
| Aryana Superstore Limited | Wholesale & retail | 2024 |
| Arysto Ltd | Wholesale & retail | 2018 |
| Arythe Network Limited | Information & communication | 2019 |
| AS & T Management Limited | Financial services | 2015 |
| AS & Young Ltd | Professional & scientific | 2026 |
| AS - FE Ltd | Manufacturing | 2008 |
| AS by Akansha Sethi Ltd | Wholesale & retail | 2018 |
| AS Cabs Limited | Manufacturing | 2014 |
| AS Club Sandwich Ltd | Hospitality | 2025 |
| AS Dispatch Ltd | Transport & logistics | 2023 |
| AS Drinks Ltd | Wholesale & retail | 2026 |
| AS Driveways Ltd | Construction | 2023 |
| AS Leak & Repairs Ltd | Construction | 2026 |
| AS Repair Center Ltd | Wholesale & retail | 2024 |
| AS Services Digital Ltd | Information & communication | 2026 |
| AS Solarworks Ltd | Professional & scientific | 2025 |
| AS Studiios Limited | Professional & scientific | 2025 |
| ASA Consultant Limited | Professional & scientific | 2024 |
| ASA GAS Heating Solutions Ltd | Construction | 2022 |
| Asad Abbas E-Commerce Ltd | Wholesale & retail | 2026 |
| Asak Investments Ltd | Real estate | 2025 |
| Asan Management Services Ltd | Wholesale & retail | 2002 |
| Asanghera Homes Ltd | Real estate | 2021 |
| Asap Plumbing Solutions Ltd | Construction | 2024 |
| ASB (Services) Limited | Other services | 2013 |
| ASB Bargains Ltd | Wholesale & retail | 2023 |
| ASB Construction & Building Limited | Construction | 2025 |
| ASB Contracts Ltd | Construction | 2019 |
| ASB Healthcare Solutions Ltd | Health & social care | 2015 |
| ASB Property Limited | Construction | 2013 |
| ASB Waste Limited | Water & waste | 2016 |
| Asbasra Ltd | Mining & quarrying | 2023 |
| Asbestos Masters Ltd | Transport & logistics | 2022 |
| Asbury Consulting Limited | Professional & scientific | 2024 |
| ASC Woodworking Design Ltd | Manufacturing | 2024 |
| Ascari Engineering Group Ltd | Wholesale & retail | 2026 |
| Ascashncarry Ltd | Wholesale & retail | 2026 |
| Ascend Golf Ltd | Information & communication | 2026 |
| Ascendant Properties Ltd | Real estate | 2025 |
| Ascendere Property Group Ltd | Real estate | 2021 |
| Ascentas Group Ltd | Information & communication | 2006 |
| Ascok Ltd | Wholesale & retail | 2026 |
| Ascut Steels Limited | Professional & scientific | 1981 |
| Asgautomotive Ltd | Wholesale & retail | 2022 |
| ASH Hill Park (ASH Hill) Management Company Limited | Real estate | 2004 |
| ASH Plumbing & Heating Services Limited | Construction | 2008 |
| ASH Sea Food Ltd | Hospitality | 2016 |
| ASH Truck & Trailer Services Ltd | Wholesale & retail | 2024 |
| Ash's Driving School Ltd | Education | 2020 |
| Ash's Seller Ltd | Wholesale & retail | 2025 |
| Asha's Fruit & VEG Ltd | Wholesale & retail | 2023 |
| Ashbourne House Investments Limited | Real estate | 2021 |
| Ashbury Timberworks Ltd | Manufacturing | 2025 |
| Ashik Chicken Kebabs Limited | Wholesale & retail | 1997 |
| Ashirvedana Ltd | Real estate | 2022 |
| Ashk Construction Ltd | Construction | 2024 |
| Ashland Garden Limited | Hospitality | 2020 |
| Ashleigh Healthcare Limited | Extraterritorial | 1992 |
| Ashleigh House Investment Limited | Real estate | 2018 |
| Ashley Court Care Limited | Health & social care | 2003 |
| Ashleyand Anish Limited | Health & social care | 2015 |
| Ashmore Logistics UK Ltd | Transport & logistics | 2026 |
| Ashmore Park I.T. Limited | Information & communication | 2003 |
| Ashpa Ltd | Health & social care | 2018 |
| Ashspice Punjabi Flames Ltd | Hospitality | 2024 |
| Ashton Properties (Wolverhampton) Limited | Real estate | 1998 |
| Ashtree Homes Ltd | Real estate | 2024 |
| Ashu's Finance Limited | Financial services | 2017 |
| Ashwood Office Interiors Limited | Wholesale & retail | 2008 |
| ASI101 Ltd | Administrative & support | 2026 |
| Asian Therapist Ltd | Administrative & support | 2024 |
| Asian Trade Global Network Limited | Wholesale & retail | 2025 |
| Asiana Events Ltd | Administrative & support | 2010 |
| Asifhuss Limited | Construction | 2025 |
| Asis Estates Limited | Construction | 2025 |
| ASJ Property Rentals Limited | Real estate | 2025 |
| ASK the Mortgage Experts Ltd | Financial services | 2019 |
| Askhad Property Limited | Real estate | 2024 |
| ASM Real Estate & Consulting Limited | Real estate | 2025 |
| Asongwe Digital Technology, Innovation Solutions & Community Development Limited | Information & communication | 2024 |
| Aspave Contractors Limited | Construction | 2025 |
| Aspect Property Maintenance Ltd | Construction | 2019 |
| Aspect TTM Design Services Ltd | Professional & scientific | 2020 |
| Aspen Leisure Limited | Hospitality | 2011 |
| Aspinall Office Installations Ltd | Manufacturing | 2015 |
| Aspiration Book-Keeping and Support Services Ltd | Professional & scientific | 2022 |
| Aspiration Properties Ltd | Real estate | 2025 |
| Aspire Education Services Ltd | Education | 2025 |
| Aspire Homes NW Ltd | Real estate | 2023 |
| Aspire Outlet 2020 Limited | Wholesale & retail | 2020 |
| Aspire Programs Ltd | Administrative & support | 2008 |
| Aspire Property Lets Limited | Real estate | 2024 |
| Aspire Public Health Ltd | Other services | 2025 |
| Aspire Supported Housing CIC | Hospitality | 2021 |
| ASPIRE365 Limited | Professional & scientific | 2013 |
| ASPIRE4U Community Interest Company | Professional & scientific | 2009 |
| Aspires UK Limited | Wholesale & retail | 2007 |