| Ashburton Prescribing Consultants Limited | Health & social care | 2013 |
| Ashbury Brook Management Company Limited | Extraterritorial | 2005 |
| Ashbury Estates Management Limited | Construction | 2006 |
| Ashbury Freeholds Limited | Real estate | 2015 |
| Ashbury Gables and Mews Management Company Limited | Extraterritorial | 2012 |
| Ashbury Grange Management Company Limited | Extraterritorial | 2012 |
| Ashbury Holdings Limited | Financial services | 2002 |
| Ashbury Homes Limited | Construction | 2000 |
| Ashbury Leaseholds Limited | Real estate | 2016 |
| Ashbury Lodge Management Company Limited | Extraterritorial | 2012 |
| Ashbury Palm Freeholds Limited | Real estate | 2003 |
| Ashbury Palm Leaseholds Limited | Real estate | 2016 |
| Ashbury Properties Limited | Financial services | 2015 |
| Ashby House (Management Company) Limited | Households | 2003 |
| Ashcliff Property Ltd | Real estate | 2026 |
| Ashcroft Cleaning and Maintenance Limited | Administrative & support | 2010 |
| Ashcroft Commercial Properties Limited | Real estate | 2017 |
| Ashcroft Settle Cars Ltd | Administrative & support | 2019 |
| Ashcroft Ventures Ltd | Wholesale & retail | 2017 |
| Ashe 74 Ltd | Transport & logistics | 2019 |
| Ashlar (NW) Holdings Limited | Financial services | 2013 |
| Ashlar Construction (NW) Limited | Construction | 2011 |
| Ashlar Electrical Limited | Construction | 2024 |
| Ashlar Estates Limited | Real estate | 2025 |
| Ashlar Living Limited | Construction | 2026 |
| Ashleigh Kirby Limited | Other services | 2026 |
| Ashlex Care Limited | Health & social care | 2015 |
| Ashley Import and Export Ltd | Transport & logistics | 2013 |
| Ashley Integrated Services Limited | Construction | 2009 |
| Ashley James Holdings Limited | Administrative & support | 2018 |
| Ashley Mead Properties Limited | Real estate | 2000 |
| Ashley Music UK Ltd | Arts & recreation | 2025 |
| Ashley Neal Driving Instruction Limited | Education | 2008 |
| Ashley Neal Media Limited | Other services | 2020 |
| Ashley Steel Ltd | Professional & scientific | 2024 |
| Ashley Wady International Holdings Group Ltd | Health & social care | 2023 |
| Ashleys Edit Ltd | Administrative & support | 2024 |
| Ashmark Property Limited | Real estate | 2022 |
| Ashore International Limited | Real estate | 2020 |
| Ashp Asset Management Ltd | Financial services | 2018 |
| Ashramco Ltd | Manufacturing | 2023 |
| Ashtech Safety Services Ltd | Professional & scientific | 2023 |
| Ashthorpe Trading Ltd | Wholesale & retail | 2023 |
| Ashton Close Management Limited | Households | 2013 |
| Ashton Construction Solutions Limited | Other services | 2007 |
| Ashton Foot Health Limited | Health & social care | 2025 |
| Ashton Heating & Plumbing (NW) Ltd | Construction | 2010 |
| Ashton Shaw Specialist Psychology Services Limited | Health & social care | 2021 |
| Ashton Sustainable Eco Ltd | Construction | 2025 |
| Ashturn Limited | Real estate | 2022 |
| Ashu Digital PVT Ltd | Professional & scientific | 2025 |
| Ashughes Testing Ltd | Information & communication | 2016 |
| Ashurst Accountancy Ltd. | Professional & scientific | 2010 |
| Ashvale Projects Limited | Professional & scientific | 2006 |
| Ashview Management Limited | Professional & scientific | 1994 |
| Ashville (U.K.) Limited | Transport & logistics | 1990 |
| ASI Logistics (UK) Limited | Transport & logistics | 2019 |
| ASI16 Ltd | Wholesale & retail | 2020 |
| Asia Pacific Infrastructure Holding Ltd | Real estate | 2018 |
| Asif Ecom Ltd | Wholesale & retail | 2025 |
| Asihene Healthcare Limited | Health & social care | 2016 |
| Asilst Ltd | Hospitality | 2025 |
| Asiya Medical Ltd | Health & social care | 2013 |
| ASK Clearview Window Cleaning Limited | Administrative & support | 2016 |
| ASK for SAM Limited | Education | 2024 |
| ASK Lettings (North West) Ltd | Real estate | 2015 |
| Askademia Limited | Administrative & support | 2016 |
| Askar Security Services Ltd | Financial services | 2025 |
| Askew Road Limited | Administrative & support | 2018 |
| Askita Ltd | Public administration | 2024 |
| Askjak Limited | Extraterritorial | 2009 |
| Askrigg Recreational Company Ltd | Agriculture & fishing | 2016 |
| Askyourself Ltd | Information & communication | 2025 |
| ASL Architecture LLP | | 2005 |
| ASL Properties North West Limited | Real estate | 2022 |
| Aslan Barbers Ltd | Other services | 2024 |
| Aslan Group Ltd | Financial services | 2024 |
| Aslan Medical Ltd | Manufacturing | 2022 |
| Aslan P/M Ltd | Real estate | 2021 |
| Aslan Retail Ltd | Wholesale & retail | 2021 |
| ASM Digital Ltd | Professional & scientific | 2023 |
| Asmartproperty Limited | Real estate | 2026 |
| ASN Inspection Limited | Construction | 2020 |
| ASO Hair CUT Ltd | Other services | 2025 |
| ASP Security Services Limited | Public administration | 2004 |
| ASP Transit Limited | Transport & logistics | 2017 |
| Aspect Electrical and Renewables Ltd | Construction | 2024 |
| Aspect Films Ltd | Information & communication | 2018 |
| Aspect Glazing & Aluminium Ltd | Construction | 2021 |
| Aspect Plumbing & Heating Limited | Construction | 2006 |
| Aspect Property Ltd | Real estate | 2020 |
| Aspen Grove Investment Limited | Real estate | 2022 |
| Aspettare Ltd | Hospitality | 2025 |
| Aspiration Housing CIC | Hospitality | 2026 |
| Aspirations (UK Property) Ltd | Real estate | 2004 |
| Aspire Care Collective Ltd | Health & social care | 2026 |
| Aspire Children's Services Ltd | Health & social care | 2026 |
| Aspire Housing Properties LLP | | 2025 |
| Aspire Hub Limited | Wholesale & retail | 2017 |
| Aspire Locums Ltd | Administrative & support | 2019 |