| Asbrown Consulting Limited | Other services | 2011 |
| Asca Food Limited | Hospitality | 2025 |
| Ascend 360 Ltd | Professional & scientific | 2020 |
| Ascend Business Solutions Ltd | Professional & scientific | 2026 |
| Ascended Scaffolding Ltd | Construction | 2026 |
| Ascendia Investments Limited | Financial services | 2023 |
| Ascendix Trading Ltd | Wholesale & retail | 2025 |
| Ascension Health Group Ltd | Health & social care | 2023 |
| Ascension Systems | | 2000 |
| Ascensus Logistics Limited | Administrative & support | 2015 |
| Ascent Abodes Ltd | Real estate | 2024 |
| Ascent Architecture Limited | Administrative & support | 2011 |
| Ascent Digital Services UK Limited | Information & communication | 2002 |
| Ascent Industries Ltd | Wholesale & retail | 2011 |
| Ascent Software (UK) Limited | Information & communication | 2012 |
| Ascent Talent Consulting Ltd | Administrative & support | 2023 |
| Ascent Trampoline Park Limited | Arts & recreation | 2015 |
| Ascentis Medical Services Ltd | Administrative & support | 2014 |
| Ascisco Limited | Administrative & support | 2003 |
| Asclea Tech Ltd | Information & communication | 2025 |
| Asclepius & Panacea Consultancy Limited | Wholesale & retail | 2022 |
| Ascot Emissaries LLP | | 2016 |
| Ascovo Ltd | Professional & scientific | 2025 |
| Ascribe Management Services Limited | Professional & scientific | 2014 |
| Asdb Property Ltd | Construction | 2022 |
| Asea Capital Limited | Construction | 2025 |
| Asensio Services Ltd | Real estate | 2023 |
| Asero AI Ltd | Professional & scientific | 2025 |
| ASG Automobile Ltd | Wholesale & retail | 2026 |
| Asga Innovations Ltd | Administrative & support | 2015 |
| Asghar Advisory Service Limited | Professional & scientific | 2022 |
| ASH Cross Productions Ltd | Information & communication | 2014 |
| ASH Hayes Limited | Professional & scientific | 2008 |
| ASH of Barbers Ltd | Other services | 2019 |
| ASH Properties (Bristol) Holdings Ltd | Financial services | 2023 |
| ASH Property Management Ltd | Real estate | 2016 |
| ASH Shifaa Medical Ltd | Health & social care | 2020 |
| ASH Studios Ltd | Professional & scientific | 2019 |
| Ashbark Residents Association Limited | Households | 1983 |
| Ashbee Consultants Limited | Information & communication | 1998 |
| Ashbourne Flats RTM Company Limited | Households | 2022 |
| Ashbourne House Care Homes Limited | Health & social care | 1996 |
| Ashbuild Bristol Ltd | Construction | 2021 |
| Ashburnham Property Developments Limited | Construction | 2015 |
| Ashcroft Services Limited | Construction | 1998 |
| Ashdale Engineering UK Ltd | Professional & scientific | 2006 |
| Ashdam Limited | Health & social care | 2024 |
| Ashdene Pictures Ltd | Information & communication | 2013 |
| Ashdon Waller Chingford Developments Limited | Construction | 2022 |
| Ashdon Waller Holdings Limited | Financial services | 2022 |
| Ashdown Court Management Limited | Households | 1971 |
| Ashdown Oakmont (Properties) Ltd | Real estate | 2023 |
| Ashdown White Limited | Administrative & support | 2024 |
| Ashe Management Limited | Real estate | 2022 |
| Asheek Living Limited | Real estate | 2011 |
| Asher Craig Consulting Ltd | Professional & scientific | 2024 |
| Ashfield (Northampton Vale) Limited | Real estate | 2024 |
| Ashfield Commercial Developments Limited | Real estate | 1997 |
| Ashfield Commercial Properties Limited | Real estate | 1994 |
| Ashfield Industrial Properties Limited | Real estate | 2002 |
| Ashfield Land (Aberdeen) Ltd | Real estate | 2015 |
| Ashfield Land (ARM Farm) Limited | Real estate | 2025 |
| Ashfield Land (Birmingham) Limited | Real estate | 1989 |
| Ashfield Land (Braintree) Limited | Real estate | 1989 |
| Ashfield Land (Bridgend) Limited | Real estate | 2017 |
| Ashfield Land (Cardiff) Limited | Real estate | 2000 |
| Ashfield Land (Fallin) Ltd | Real estate | 2019 |
| Ashfield Land (Glasgow) Limited | Real estate | 2003 |
| Ashfield Land (Harborough) Limited | Real estate | 2022 |
| Ashfield Land (Newton) Ltd | Real estate | 2021 |
| Ashfield Land (Pitreavie) Ltd | Real estate | 2025 |
| Ashfield Land (Rutherglen) Limited | Real estate | 1989 |
| Ashfield Land (Stafford) Ltd | Real estate | 2026 |
| Ashfield Land (Taunton) Limited | Real estate | 2024 |
| Ashfield Land Developments Limited | Real estate | 2001 |
| Ashfield Land Environments Ltd | Real estate | 2008 |
| Ashfield Land Limited | Real estate | 2002 |
| Ashfield Land Management Limited | Real estate | 1991 |
| Ashfield Place Management Company Limited | Real estate | 2025 |
| Ashfield Provincial Properties Ltd. | Real estate | 1982 |
| Ashford & Co Bristol Limited | Administrative & support | 2025 |
| Ashford & Co UK Limited | Administrative & support | 2025 |
| Ashford Building Contractors Ltd. | Construction | 2014 |
| Ashford Co & Sons Limited | Administrative & support | 2025 |
| Ashford Design & Build Limited | Construction | 2014 |
| Ashgrove Consultancy Limited | Professional & scientific | 2025 |
| Ashgrove Mews Management Company Limited | Households | 2000 |
| Ashill Property Limited | Real estate | 2018 |
| Ashington Circle (Property & Developments) Ltd | Real estate | 2016 |
| Ashland Building Services Limited | Construction | 2020 |
| Ashley Best Ltd | Information & communication | 2017 |
| Ashley Bryant Brickworks Limited | Construction | 2017 |
| Ashley Community & Housing Ltd | Hospitality | 2008 |
| Ashley Court (Severn Beach) Limited | Real estate | 2008 |
| Ashley Court Management Company (Bristol) Limited | Households | 1988 |
| Ashley Down Brewery Limited | Manufacturing | 2009 |
| Ashley Down Management Limited | Households | 2019 |
| Ashley Engines Ltd | Wholesale & retail | 2004 |
| Ashley Finance Limited | Financial services | 1993 |
| Ashley House (Fowey) Management Company Limited | Households | 2015 |