| ARK Infrastructure Ltd | Other services | 2005 |
| Arkoo Ltd | Manufacturing | 2021 |
| Armaans Kitchen Ltd | Hospitality | 2021 |
| Armitt & Company Limited | Professional & scientific | 2007 |
| Arnold Property Management Company Limited | Households | 1997 |
| Arong Ltd | Hospitality | 2020 |
| Arranrosinvestments Limited | Real estate | 2017 |
| Arrol Architects Limited | Professional & scientific | 1985 |
| Arrow Point Archery Ltd | Education | 2026 |
| Arsala Habibah Ltd | Professional & scientific | 2022 |
| Artezzan Restaurants Limited | Hospitality | 2020 |
| Arthur Kershaw Funeral Services Limited | Other services | 2010 |
| Artin Barber Ltd | Other services | 2024 |
| Artist Touch Barber Ltd | Other services | 2024 |
| Artt Consumer Associates Limited | Professional & scientific | 2014 |
| Aruga Cyber Ltd | Information & communication | 2024 |
| Arxca Ltd | Financial services | 2018 |
| AS Construction North West Ltd | Construction | 2021 |
| AS8 Ltd | Professional & scientific | 2025 |
| Asap CRM Consultancy Limited | Information & communication | 2002 |
| Asatw Properties Ltd | Real estate | 2020 |
| Ascend Estates Ltd | Real estate | 2014 |
| Ascend GP Limited | Real estate | 2018 |
| Ascendia Careers Ltd | Professional & scientific | 2025 |
| Ascendiadre Ltd | Wholesale & retail | 2025 |
| Ascent Consulting Group Limited | Administrative & support | 2018 |
| Ascent Recruitment Limited | Administrative & support | 2024 |
| ASH Construct Limited | Construction | 2025 |
| Ashbourne Cleaning Services Limited | Extraterritorial | 2010 |
| Ashley Helme Associates Limited | Administrative & support | 1996 |
| Ashton and Carrington Ltd | Professional & scientific | 2023 |
| Ashton Flats Ltd | Real estate | 2020 |
| Ashton Manor Motors Ltd | Wholesale & retail | 2025 |
| Ashton Mersey Vapes Limited | Wholesale & retail | 2025 |
| Ashton on Mersey Cricket Club Limited | Real estate | 1923 |
| Ashton on Mersey Football Club Ltd | Arts & recreation | 2018 |
| Ashton on Mersey Sports Club (Trading) Limited | Hospitality | 2023 |
| Ashton on Mersey Sports Club Limited | Arts & recreation | 2013 |
| Ashvilla Dental Practice Limited | Health & social care | 2011 |
| Ashwood Psychotherapy Ltd | Health & social care | 2021 |
| Ashworth Holme Ltd | Real estate | 2011 |
| Asiabusiness Hub Ltd | Wholesale & retail | 2016 |
| ASK360 Ltd | Hospitality | 2025 |
| ASO Healthcare Limited | Health & social care | 2023 |
| Aspire Consultancy Manchester Ltd | Professional & scientific | 2024 |
| Aspire Health Care Services Ltd | Health & social care | 2025 |
| Aspire Management Group Ltd | Households | 2024 |
| Aspire Sports, Arts & Enterprise Limited | Professional & scientific | 2017 |
| Aspyn Properties Ltd | Real estate | 2022 |
| Asset Guide Limited | Financial services | 2017 |
| Asset Property Management (North East) Limited | Real estate | 2012 |
| Associated Agencies (Manchester) Limited | Professional & scientific | 2011 |
| Assured Abodes Limited | Real estate | 2023 |
| Astor Property Services Limited | Real estate | 2023 |
| Asunder Films Ltd | Information & communication | 2025 |
| AT Group (UK) Limited | Professional & scientific | 2016 |
| AT Technical Training Services Limited | Wholesale & retail | 2013 |
| At-Home Euthanasia Vets Ltd | Professional & scientific | 2025 |
| Aten Advisory Ltd | Professional & scientific | 2016 |
| Atenas UK Ltd | Hospitality | 2023 |
| Athes Performance Ltd | Arts & recreation | 2016 |
| Athlete Media Ltd | Education | 2022 |
| Athletic Development and Recovery Ltd | Arts & recreation | 2021 |
| Atkinson House Maintenance Limited | Households | 1970 |
| Atlas Building Services Ltd | Construction | 2025 |
| Atmos Decorators Ltd | Construction | 2023 |
| Atray Ltd | Professional & scientific | 2014 |
| Attard Change Consulting Limited | Professional & scientific | 2019 |
| Atteya Medical Center Ltd | Health & social care | 2025 |
| Audacious Ltd | Administrative & support | 2023 |
| Audioplace Limited | Professional & scientific | 2023 |
| August (GBR) PTY Ltd | Extraterritorial | 2017 |
| Auld Triangle Works Ltd | Information & communication | 2025 |
| Aura Digital Solutions Ltd | Wholesale & retail | 2023 |
| Auravien Reliantea Ltd | Wholesale & retail | 2025 |
| Aurora Flora Ltd | Wholesale & retail | 2026 |
| Aurora Incorporated Ltd | Professional & scientific | 2017 |
| Aurora Sky of Beauty Ltd | Other services | 2024 |
| Austin & Co GAS Solutions Ltd | Construction | 2025 |
| Austin P Consultants Limited | Information & communication | 2025 |
| Austin Perry Property Ltd | Real estate | 2025 |
| Autism Foundation C.I.C. | Health & social care | 2024 |
| Auto Installation Solutions Limited | Wholesale & retail | 2017 |
| Auto World CMG Limited | Manufacturing | 2026 |
| Autos a to Z Limited | Wholesale & retail | 2013 |
| Autotech Service Centre Limited | Wholesale & retail | 2002 |
| AV International Solutions Ltd | Professional & scientific | 2019 |
| Avalon Court Management (Notts) Ltd | Real estate | 2019 |
| Aventrex Ltd | Wholesale & retail | 2025 |
| Avenue (Holdings) Limited | Professional & scientific | 1999 |
| Averner Limited | Information & communication | 2012 |
| AVI Evara Ltd | Real estate | 2024 |
| AVI Medics Ltd | Real estate | 2023 |
| Avina Property Ltd | Real estate | 2025 |
| Avosetta Limited | Professional & scientific | 2006 |
| Avro Homes Ltd | Construction | 2019 |
| Axleforce Limited | Professional & scientific | 2025 |
| Axon Medicare Limited | Health & social care | 2015 |
| Ayababj Limited | Manufacturing | 2026 |
| Aydac Limited | Construction | 2019 |