| Advanced Generation Global Ltd | Professional & scientific | 2022 |
| Advanced Grinding Solutions Ltd | Manufacturing | 2014 |
| Advanced Healing Therapies Limited | Health & social care | 2009 |
| Advanced Laminates Limited | Manufacturing | 2007 |
| Advanced Property Investments Ltd | Real estate | 2016 |
| Advanced Property Reporting Limited | Information & communication | 2023 |
| Advanced Soft Solutions Ltd | Extraterritorial | 2022 |
| Advanced Surveys Limited | Construction | 2014 |
| Advancing Mindset Ltd | Financial services | 2023 |
| Advantage Accounts Limited | Professional & scientific | 2009 |
| Advantage Growth Fund CIV Limited Partnership | | 2002 |
| Advantage Growth Fund Limited Partnership | | 2002 |
| Advantax Limited | Professional & scientific | 2000 |
| Advanted Ltd | Professional & scientific | 2005 |
| Advent FM Group Limited | Administrative & support | 2017 |
| Adventi LLP | | 2025 |
| Adventure Marketing Pty.Ltd | | 1989 |
| Adventurer Management Ltd | Extraterritorial | 2013 |
| Advertiser Publishing Limited | Professional & scientific | 2008 |
| Advik Solutions Ltd | Other services | 2018 |
| Adworx Limited | Construction | 2026 |
| ADY Services ( Midlands) Limited | Construction | 2014 |
| ADY UK Ltd | Wholesale & retail | 2009 |
| ADY V6 Express Ltd | Transport & logistics | 2022 |
| Ady=Rup Investments Ltd | Transport & logistics | 2022 |
| Adyo Consulting Limited | Professional & scientific | 2025 |
| Adyo Properties Limited | Real estate | 2025 |
| Adzstudios Ltd | Information & communication | 2023 |
| AE (UK) Technologies Ltd | Construction | 2016 |
| AE Care Group Ltd | Health & social care | 2023 |
| AE Shelters Ltd | Health & social care | 2023 |
| Ae&Sa Limited | Health & social care | 2023 |
| Ae(Uk) D Ltd | Real estate | 2021 |
| Aegean Crystal Consultancy Services Ltd | Wholesale & retail | 2020 |
| Aegis Technologies (South) Limited | Administrative & support | 2023 |
| Aegle Systems Limited | Professional & scientific | 2025 |
| Aekay 8 Limited | Professional & scientific | 2020 |
| Aeldq Limited | Manufacturing | 2002 |
| AEM Developments Ltd | Construction | 2024 |
| Aems Recruitment Ltd | Administrative & support | 2026 |
| Aenrock Logistics Ltd | Transport & logistics | 2017 |
| Aequitas Immigration Law Firm Ltd | Professional & scientific | 2014 |
| Aequitas Management Services Ltd | Administrative & support | 2024 |
| Aerath Limited | Real estate | 2014 |
| Aero IT Digital Solution Ltd | Information & communication | 2025 |
| Aerocom Metals Limited | Manufacturing | 2008 |
| Aerosoft International Ltd | Wholesale & retail | 2025 |
| Aerospace Supply Chain Advisory Limited | Wholesale & retail | 2025 |
| Aerotech Aircraft Maintenance Limited | Manufacturing | 1997 |
| Aerotech Laboratories Limited | Professional & scientific | 2005 |
| Aesthetics Inspired Clinic Ltd | Other services | 2024 |
| Aesto Global Ltd | Wholesale & retail | 2026 |
| Aeterna Consulting Limited | Information & communication | 2023 |
| Aethera Estates Limited | Real estate | 2026 |
| Aetherforce Investments Limited | Real estate | 2019 |
| Aetherion Energy Solutions Limited | Professional & scientific | 2025 |
| Aetherion Holdings Limited | Financial services | 2026 |
| Aethern Energy UK Ltd | Wholesale & retail | 2023 |
| Aethern Integrated Infrastructure UK Ltd | Financial services | 2025 |
| Aethon Labs Limited | Information & communication | 2026 |
| Aetius Strategy Advisory Limited | Professional & scientific | 2021 |
| Aevichagit Ltd | Information & communication | 2022 |
| AEW Lerouge Limited | Financial services | 2025 |
| AEY Digital Ltd | Wholesale & retail | 2018 |
| AF & JF Properties Ltd | Households | 2023 |
| AF Adex Ltd | Health & social care | 2022 |
| AF Courier Services Limited | Transport & logistics | 2024 |
| AF Installs Ltd | Construction | 2024 |
| Afaif Ltd | Real estate | 2023 |
| AFB Investments Ltd | Real estate | 2020 |
| AFC Coventry Lions CIC | Arts & recreation | 2026 |
| AFD Solutions Ltd | Information & communication | 2022 |
| AFDHUUB11 Ltd | Transport & logistics | 2025 |
| Affinity Beauty Ltd | Other services | 2009 |
| Affinity Global Enterprises Ltd | Other services | 2013 |
| Affinity Project Services Ltd | Professional & scientific | 2018 |
| Affirm Property Management and Services Ltd | Real estate | 2024 |
| Affluent Consultancy Ltd | Information & communication | 2008 |
| Affluent Technology Limited | Information & communication | 2008 |
| Afghan & Turkish Restaurant Limited | Hospitality | 2025 |
| Afghan Alavi Medical Services Limited | Health & social care | 2015 |
| Afghan Community Relief | Education | 2024 |
| Afghan Cultural and Islamic Centre of Coventry C.I.C. | Education | 2025 |
| Afghanbrothers Limited | Wholesale & retail | 2025 |
| Afkk Limited | Real estate | 2022 |
| Aflaa Ltd | Construction | 2024 |
| Afms Group Ltd | Administrative & support | 2022 |
| Afrakoma Cosmetics Limited | Wholesale & retail | 2026 |
| Afrakoma Supermarket Ltd | Wholesale & retail | 2024 |
| Africa and Arab Superstore Ltd | Hospitality | 2024 |
| Africa DUE Diligence Worldwide Ltd | Information & communication | 2026 |
| Africa EV Solutions Limited | Financial services | 2023 |
| Africa House UK Enterprise Limited | Professional & scientific | 2020 |
| Africa Performing Arts Theatre Limited | Arts & recreation | 2019 |
| African Durbar and Business Expo (Midlands) CIC | Public administration | 2024 |
| African European Loving Patrotic Citizens Ltd | Professional & scientific | 2026 |
| African Fresh VEG Grocery Limited | Wholesale & retail | 2025 |
| African Heritage Collaborative Network C.I.C. | Arts & recreation | 2025 |
| African Pits and Quarries Limited | Professional & scientific | 2022 |
| Africrest Ltd | Wholesale & retail | 2026 |