| Adonis Trading Ltd | Wholesale & retail | 2021 |
| ADQ Commercial Ltd | Professional & scientific | 2024 |
| ADR Stores Ltd | Wholesale & retail | 2023 |
| Adrian Mihai ION Ltd | Transport & logistics | 2025 |
| Adrian RAY Holdings Limited | Financial services | 2024 |
| Adrian RAY Property Limited | Real estate | 2024 |
| Adrian Rees Consulting Ltd | Professional & scientific | 2021 |
| Adromedae Holdings Ltd | Financial services | 2020 |
| Adun Toridas Ltd | Information & communication | 2026 |
| Advance Analytica Limited | Information & communication | 2024 |
| Advance Carpet Tiles Limited | Construction | 2011 |
| Advance Carz Ltd | Transport & logistics | 2019 |
| Advance Clinical Services Ltd | Health & social care | 2024 |
| Advance Fire and Security Solutions Ltd | Construction | 2023 |
| Advance Practice Consulting Limited | Health & social care | 2025 |
| Advance Presence Solutions Ltd | Information & communication | 2024 |
| Advance Technology SOL (ATS) UK Ltd | Wholesale & retail | 2019 |
| Advance Telecom Services Ltd | Construction | 2024 |
| Advanced Dynamics Group Limited | Financial services | 2021 |
| Advanced Dynamics Holdings Limited | Financial services | 2019 |
| Advanced Dynamics Limited | Administrative & support | 2004 |
| Advanced Engineering Group Holdings Limited | Financial services | 2025 |
| Advanced Hair Training Limited | Education | 2013 |
| Advanced Ideas Limited | Wholesale & retail | 2005 |
| Advanced Integrated Controls Ltd | Manufacturing | 2020 |
| Advanced Property Auction Ltd | Real estate | 2017 |
| Advanced Repair Services Ltd | Manufacturing | 2019 |
| Advanced Test Solutions Limited | Manufacturing | 2012 |
| Adventure Camping Ltd | Wholesale & retail | 2025 |
| Advercorp Group Limited | Professional & scientific | 2025 |
| Advisor AI Limited | Information & communication | 2025 |
| Advocate of Right Mindset Initiatives | Administrative & support | 2026 |
| ADW Estates Limited | Real estate | 2022 |
| ADW Holdings Ltd | Financial services | 2009 |
| ADW Investments Ltd | Real estate | 2004 |
| ADW Limited | Real estate | 2009 |
| ADW Properties Limited | Real estate | 2020 |
| Adwalton (Holdings) Limited | Real estate | 2012 |
| Adworx Printing.Com Ltd | Professional & scientific | 2019 |
| ADY DTS Ltd | Transport & logistics | 2026 |
| Adyan Care Ltd | Health & social care | 2024 |
| Adyan K Ltd | Health & social care | 2019 |
| AE Developments Ltd | Real estate | 2025 |
| AE Payroll Administration Limited | Information & communication | 2015 |
| AEA Auto Ltd | Other services | 2018 |
| Aegis Corp Ltd | Wholesale & retail | 2024 |
| Aegis Mart Ltd | Wholesale & retail | 2025 |
| Aehj Ltd | Information & communication | 2021 |
| Aelux Cleaning Services Ltd | Administrative & support | 2025 |
| Aemans Fashion Ltd | Wholesale & retail | 2017 |
| Aeolian Apps Ltd | Information & communication | 2024 |
| Aeom Creative Ltd | Professional & scientific | 2018 |
| Aerial Waves Limited | Information & communication | 2012 |
| Aero Engine Logistics Ltd | Transport & logistics | 2021 |
| Aerolux Detailing Ltd | Manufacturing | 2026 |
| Aeroshield Ltd | Administrative & support | 2024 |
| Aesa Trading Academy Ltd | Education | 2022 |
| Aesh ENT. Limited | Wholesale & retail | 2025 |
| Aesteem by Romessa Ltd | Other services | 2025 |
| Aesthetics by L Ltd | Other services | 2026 |
| Aesthetics by Nurse Mandy Ltd | Other services | 2025 |
| Aesthetics Support and Marketing Ltd | Other services | 2025 |
| Aetheron Crest Ltd | Other services | 2017 |
| Aethon Accountancy Limited | Professional & scientific | 2026 |
| Aevitas Group Ltd | Administrative & support | 2025 |
| AEY Ltd | Professional & scientific | 2016 |
| AF Catering Group Limited | Hospitality | 2024 |
| AF Events Blackburn Limited | Hospitality | 2022 |
| AF Events Manchester Limited | Hospitality | 2024 |
| AF Foods Limited | Manufacturing | 2012 |
| AF Luxe Beauty Limited | Manufacturing | 2025 |
| AF Process Solutions Limited | Professional & scientific | 2021 |
| AF Restaurants Blackburn Limited | Hospitality | 2022 |
| AF Restaurants Limited | Hospitality | 2019 |
| AFA Imaging Ltd | Health & social care | 2020 |
| AFA Property Holdings Ltd | Real estate | 2020 |
| Afaa Limited | Professional & scientific | 2024 |
| Afahmed Ltd | Wholesale & retail | 2021 |
| AFC Fried Chicken Ltd | Hospitality | 2023 |
| AFD IT Solutions Ltd | Information & communication | 2011 |
| AFD Resourcing Ltd | Information & communication | 2015 |
| Affinity Pharma Ltd | Wholesale & retail | 2022 |
| Affinity Yorkshire Ltd | Construction | 2015 |
| Affordable Day Trips Limited | Transport & logistics | 2024 |
| Affordable Goods Ltd | Extraterritorial | 2025 |
| Affordable Solar Panels Ltd | Construction | 2025 |
| Afghan Winner International Logistics Services, Construction, Financial & Official Consultancy Ltd | Construction | 2023 |
| Afia Solutions Ltd | Health & social care | 2024 |
| Afiyaah Limited | Wholesale & retail | 2023 |
| AFK Buy Rent Ltd | Real estate | 2025 |
| AFK Healthcare Limited | Health & social care | 2024 |
| AFK Hub Ltd | Arts & recreation | 2025 |
| AFM Construction Services Ltd | Construction | 2017 |
| Afnan Ltd | Information & communication | 2026 |
| Afolabi Management Consulting Limited | Professional & scientific | 2024 |
| Afreen Lifestyle Ltd | Wholesale & retail | 2024 |
| Afri Foods Global Limited | Hospitality | 2024 |
| Africa Cash and Carry Limited | Wholesale & retail | 2024 |
| Africa Connection | Other services | 2012 |
| AFRICA4U and Friends CIC | Education | 2024 |