| Artodontics Limited | Health & social care | 2021 |
| Artran Software Limited | Information & communication | 2024 |
| Arts for Recovery in the Community | Arts & recreation | 2004 |
| Artwise Curators Limited | Arts & recreation | 2000 |
| Artwork Portfolio Limited | Arts & recreation | 2020 |
| Arun Kumar Limited | Health & social care | 2004 |
| Aruna Tanning Salon Limited | Other services | 2025 |
| Arundale Flats Management Limited | Households | 1983 |
| Arvello House Limited | Wholesale & retail | 2026 |
| Arvind Holdings Limited | Information & communication | 2021 |
| ARW Consulting Services Ltd | Professional & scientific | 2026 |
| ARW Fabrication Ltd | Manufacturing | 2024 |
| ARY Consultants Ltd | Professional & scientific | 2023 |
| Arya Anna Limited | Health & social care | 2024 |
| Arya Housing Ltd | Households | 2025 |
| Arye Developments Ltd | Construction | 2019 |
| Arye Ltd | Real estate | 2017 |
| AS Advisory Services Ltd | Professional & scientific | 2026 |
| AS Energy Marketing Limited | Energy | 2023 |
| AS Interiors MAN Ltd | Construction | 2015 |
| AS Partners Design Limited | Information & communication | 2012 |
| AS Shines Ltd | Wholesale & retail | 2022 |
| AS Surveying Solutions Limited | Professional & scientific | 2025 |
| ASA Network Limited | Administrative & support | 2023 |
| ASA Play Ltd | Health & social care | 2023 |
| Asadilari Limited | Wholesale & retail | 2015 |
| Asap Coffee Ltd | Hospitality | 2023 |
| Asappcars Ltd | Transport & logistics | 2018 |
| Asar Trades Limited | Wholesale & retail | 2025 |
| Asatru Apparel Limited | Wholesale & retail | 2026 |
| ASB Action Limited | Administrative & support | 2007 |
| Asbestos Clearance and Disposal Services Limited | Water & waste | 1984 |
| Asbestos Removal Team Ltd | Water & waste | 2022 |
| Asbestos Surveys Stockport Ltd | Professional & scientific | 2025 |
| ASC Planning Ltd | Professional & scientific | 2015 |
| Ascend Cycling Tours Limited | Administrative & support | 2023 |
| Ascendant Projects Limited | Real estate | 2018 |
| Ascensio Advisory Ltd | Professional & scientific | 2026 |
| Ascent Computing Limited | Extraterritorial | 2016 |
| Ascorp Ltd | Wholesale & retail | 2025 |
| Ascot Hyde Ltd | Construction | 2025 |
| Ascot International (1996) Limited | Wholesale & retail | 2001 |
| Ascot International Group Limited | Financial services | 2021 |
| ASE Assets Limited | Real estate | 2025 |
| ASE Motors Limited | Wholesale & retail | 2023 |
| Asean Limited | Hospitality | 1999 |
| Asegure Ltd | Extraterritorial | 2012 |
| Asel Ltd | Wholesale & retail | 2019 |
| Aseman Limited | Administrative & support | 2020 |
| Asepticore Consultants Limited | Professional & scientific | 2025 |
| Asgard Properties Limited | Real estate | 2016 |
| Asgard Technical Services Ltd | Other services | 2016 |
| ASH & Ember Events Ltd | Hospitality | 2025 |
| ASH Heaton Moor Limited | Other services | 2015 |
| ASH Joinery & Developments Ltd. | Construction | 2012 |
| ASH Lodge (Poynton) Limited | Households | 1971 |
| ASH Signs & Engraving Limited | Manufacturing | 2001 |
| Ashbank Property Co Limited | Construction | 1964 |
| Ashbank Stockport Limited | Real estate | 2015 |
| Ashbourne Methodist Church Developments Ltd | Construction | 2018 |
| Ashbrook Joinery Limited | Manufacturing | 2026 |
| Ashbrook Property Ltd | Real estate | 2020 |
| Ashbrook Windows Limited | Construction | 2002 |
| Ashchurch Limited | Administrative & support | 2012 |
| Ashcroft Advantage Limited | Professional & scientific | 2025 |
| Ashcroft Homes Bolton Ltd | Construction | 2022 |
| Ashdene Property Management Limited | Real estate | 2024 |
| Ashdown House Limited | Real estate | 2012 |
| Ashfell Court Limited | Households | 1981 |
| Ashgate Software Limited | Information & communication | 2006 |
| Ashlac Consultants Limited | Professional & scientific | 2005 |
| Ashleigh E Adams Osteopath Ltd | Health & social care | 2022 |
| Ashley Business Services Ltd | Administrative & support | 2020 |
| Ashley Court (Hollingworth) Management Ltd | Real estate | 2015 |
| Ashley Fasteners Ltd | Other services | 2018 |
| Ashley International Limited | Professional & scientific | 1989 |
| Ashley Property Services Ltd | Real estate | 2025 |
| Ashley Sales Limited | Professional & scientific | 2016 |
| Ashmore Business Services Ltd | Professional & scientific | 2021 |
| Ashraf (Manchester) Ltd | Real estate | 2014 |
| Ashton Auto Care Limited | Wholesale & retail | 2026 |
| Ashton Empire Hippodrome (Building) Ltd. | Construction | 2019 |
| Ashton Family Residential Ltd | Real estate | 2022 |
| Ashton Law (Overseas) Limited | Real estate | 2020 |
| Ashton Law (UK) Limited | Professional & scientific | 2015 |
| Ashton Medical Limited | Health & social care | 2024 |
| Ashton Park Consulting Limited | Professional & scientific | 2024 |
| Ashton Properties (N.W.) Limited | Real estate | 2015 |
| Ashton Road Limited | Health & social care | 2006 |
| Ashvale Trading Limited | Wholesale & retail | 2010 |
| Ashworth Customs Ltd | Wholesale & retail | 2025 |
| Ashworth Electrical Holdings Ltd | Financial services | 2023 |
| Ashworth-Jones Limited | Construction | 2005 |
| ASI Pharmacare Ltd | Health & social care | 2022 |
| Asia Travel Specialist Limited | Administrative & support | 2020 |
| Asian Shop Ltd | Wholesale & retail | 2025 |
| Asir Travel Limited | Administrative & support | 2024 |
| ASK International Group Limited | Professional & scientific | 2022 |
| ASK Talent Recruitment Group Ltd | Administrative & support | 2021 |
| ASK Talent Solutions Limited | Administrative & support | 2015 |