| Aeroco Holdings Limited | Manufacturing | 2012 |
| Aerocol (GB) Limited | Administrative & support | 1994 |
| Aerodata Software Limited | Information & communication | 2011 |
| Aeroparker Limited | Professional & scientific | 2022 |
| Aeroqual Consultants Ltd | Professional & scientific | 2024 |
| Aesthetic Smiles Manchester Limited | Health & social care | 2024 |
| Aesthetically Aurora Ltd | Other services | 2019 |
| AEW Sports Academy Ltd | Arts & recreation | 2019 |
| Aewconsult Ltd | Professional & scientific | 2019 |
| AF Properties NW Ltd | Real estate | 2023 |
| Afan Limited | Wholesale & retail | 2020 |
| Affc Investments Ltd | Real estate | 2026 |
| Affect Media Limited | Information & communication | 2016 |
| Affinity Glass Ltd | Construction | 2009 |
| AFG Independent Social Work Limited | Professional & scientific | 2023 |
| AFI Properties NW Ltd | Real estate | 2025 |
| Aficionado Distribution Ltd | Wholesale & retail | 2011 |
| Afiyet Manchester Ltd | Hospitality | 2024 |
| Afiyet Stockport Ltd | Hospitality | 2022 |
| AFL Limited | Professional & scientific | 2020 |
| Afmd Limited | Information & communication | 2009 |
| Afrapoco Limited | Wholesale & retail | 2008 |
| Africa Trade Promotion Ltd | Wholesale & retail | 2022 |
| African Horizons Ltd | Administrative & support | 2006 |
| African Suya and Grills Limited | Hospitality | 2025 |
| Africas Legacy Group Limited | Wholesale & retail | 2026 |
| Aftab Software Services Ltd | Information & communication | 2021 |
| AFU Retail Ltd | Wholesale & retail | 2026 |
| AFW Legal Consultancy Ltd | Professional & scientific | 2021 |
| AFW Software Solutions Ltd | Information & communication | 2023 |
| AG 26 Ltd | Financial services | 2024 |
| AG Architectural Solutions Ltd | Professional & scientific | 2014 |
| AG Balloon Arrangements Limited | Administrative & support | 2022 |
| AG Publishing Ltd | Information & communication | 2025 |
| AG Residential Developments Ltd | Construction | 2022 |
| AG Strategy Ltd | Professional & scientific | 2026 |
| AG Talent Solutions Ltd | Professional & scientific | 2026 |
| AG Technology Group Limited | Information & communication | 2019 |
| Agadi Ltd | Wholesale & retail | 2020 |
| Agapanthus Interiors Limited | Wholesale & retail | 2014 |
| Agaram Actuarial Limited | Professional & scientific | 2020 |
| Agathoclis Beckmann Limited | Professional & scientific | 2011 |
| Agb-Healthcare Limited | Professional & scientific | 2018 |
| AGE Active Limited | Health & social care | 2013 |
| AGE Check Certification Scheme Ltd | Professional & scientific | 2018 |
| AGE UK Stockport | Health & social care | 2010 |
| AGE UK Stockport Trading Limited | Health & social care | 1994 |
| Agecroft Builders Merchants Ltd | Wholesale & retail | 2017 |
| Agecroft Court Management Company Limited | Households | 2015 |
| Agecroft Glazing Limited | Construction | 2008 |
| Agencygolf Limited | Professional & scientific | 2026 |
| Agentic Partners Ltd | Professional & scientific | 2025 |
| Agentur DER Ideen Marketing Ltd | Administrative & support | 2009 |
| Agenzia Trading Limited | Wholesale & retail | 2020 |
| AGF Finance Limited | Financial services | 2011 |
| AGG (NW) Ltd | Construction | 2025 |
| AGI Cargo Ltd | Transport & logistics | 2024 |
| Agile Holdco Limited | Financial services | 2014 |
| Aglide Ltd | Information & communication | 2023 |
| AGM Business Development Limited | Other services | 2015 |
| AGM Telecommunications Limited | Information & communication | 1999 |
| Agnt Ltd | Information & communication | 2025 |
| Agnusdei Holdings Limited | Financial services | 2026 |
| Agora Enterprises Limited | Information & communication | 2016 |
| AGR Brown Enterprises Limited | Other services | 2025 |
| AGR Brown Properties Limited | Construction | 2025 |
| Agre-Haul Limited | Transport & logistics | 2018 |
| Agris Jakobsons Ltd | Information & communication | 2025 |
| Agrolodge Limited | Administrative & support | 1983 |
| AH & Co. Properties Limited | Real estate | 2022 |
| AH Dencare Limited | Health & social care | 2015 |
| AH Exreme Enterprises Ltd | Wholesale & retail | 2023 |
| AH Real Estates( MCR) Ltd | Real estate | 2022 |
| AHA Builders & Developers Ltd | Construction | 2025 |
| AHA Care Home Limited | Health & social care | 2024 |
| AHA Homes Limited | Real estate | 2024 |
| AHA Traders NW Ltd | Wholesale & retail | 2025 |
| AHC Property Group Ltd | Real estate | 2025 |
| Ahiz Tech & More Ltd | Wholesale & retail | 2025 |
| Ahlh Ltd | Hospitality | 2026 |
| Ahmad Developments Ltd | Real estate | 2014 |
| Ahme Ltd | Wholesale & retail | 2025 |
| Ahmed Building Contractors Ltd | Construction | 2019 |
| Ahmed Commercial Limited | Real estate | 2025 |
| Ahmed Khan Property Ltd | Other services | 2023 |
| Ahmed Properties North West Ltd | Real estate | 2025 |
| Ahmed Property 24 Limited | Households | 2024 |
| Ahmed Strategic Holdings Limited | Financial services | 2026 |
| Ahmh Holding Ltd | Administrative & support | 2017 |
| Ahnk Group Holding Limited | Education | 2025 |
| AHS Innovation Limited | Real estate | 2021 |
| Ahuja & Brothers (UK) Ltd | Wholesale & retail | 2019 |
| Ahuramedicina Limited | Health & social care | 2016 |
| AI Business Accountancy Limited | Professional & scientific | 2025 |
| AI by Inspire Ltd | Information & communication | 2025 |
| AI MCR Ltd | Real estate | 2020 |
| AI Properties MCR Ltd | Real estate | 2020 |
| AI Smart Solutions Limited | Other services | 2025 |
| AI9 Ltd | Information & communication | 2023 |
| Aibn Ltd | Health & social care | 2026 |