| AVS Group Limited | Financial services | 2023 |
| AVS Projects Limited | Construction | 2019 |
| Avvsim Care Limited | Health & social care | 2007 |
| AVY Build Ltd | Construction | 2024 |
| Avys Kapital Limited | Professional & scientific | 2022 |
| AVZ Trading Ltd | Wholesale & retail | 2020 |
| AW Consultancy Services Limited | Professional & scientific | 2025 |
| AW Technical Solutions Limited | Professional & scientific | 2023 |
| Awafi Trading Ltd. | Administrative & support | 2019 |
| Awakening (WW) Ltd | Information & communication | 2004 |
| Awesome Gargwalla Ventures Ltd | Real estate | 2016 |
| Awfully Awesome Ltd | Hospitality | 2025 |
| Awright Media Ltd | Professional & scientific | 2016 |
| AWS Surgical Supplies Ltd | Wholesale & retail | 2021 |
| AWS Trade Consultants Limited | Administrative & support | 2024 |
| AWT Group Ltd | Professional & scientific | 2025 |
| Awtad UK Limited | Construction | 2023 |
| AX2 Properties Limited | Real estate | 2026 |
| AX5 Investments Ltd | Households | 2024 |
| Axcel Tutors Limited | Education | 2019 |
| AXE Gloabal Trade Ltd | Wholesale & retail | 2026 |
| Axes Real Estate Investments Limited | Real estate | 2023 |
| Axi-Dent Ltd | Wholesale & retail | 2002 |
| Axia Property Holdings Ltd | Real estate | 2022 |
| Axial Collection Ltd | Wholesale & retail | 2024 |
| Axial Logistics Ltd | Transport & logistics | 2024 |
| Axial Tech Ltd | Information & communication | 2023 |
| Axiknox Tech Ltd | Information & communication | 2025 |
| Axiom Direct Ltd | Wholesale & retail | 2025 |
| Axiom E-Consultancy Ltd | Professional & scientific | 2026 |
| Axiom Rectory Limited | Health & social care | 2023 |
| Axis Civil Ltd | Construction | 2026 |
| Axis Global Freight Services Limited | Transport & logistics | 2006 |
| Axis Horizon Limited | Professional & scientific | 2025 |
| Axis Parcel Service Limited | Transport & logistics | 1997 |
| AXIS4 Properties Limited | Real estate | 2021 |
| Axon Consultancy Group Limited | Health & social care | 2022 |
| Axton Books Ltd | Other services | 2014 |
| Axxis Partners Ltd | Real estate | 2004 |
| AY Consulting Ltd | Administrative & support | 2019 |
| AY Numerics Ltd | Professional & scientific | 2026 |
| AYA Lewis Japanese Business Consultancy Ltd | Professional & scientific | 2025 |
| AYA Sutton Limited | Real estate | 2025 |
| Ayaam Limited | Professional & scientific | 2018 |
| Ayaanw Ltd | Information & communication | 2022 |
| Ayal Limited | Real estate | 2011 |
| Aycs Healthcare Analytics Limited | Information & communication | 2026 |
| Aydeya Limited | Information & communication | 2016 |
| AYG Ltd | Construction | 2024 |
| Ayisas Ltd | Wholesale & retail | 2025 |
| Aylsham Manor Residential Care Limited | Health & social care | 2025 |
| Ayman Tyler & Co Ltd | Professional & scientific | 2000 |
| Ayman Tyler Associates Ltd | Professional & scientific | 2015 |
| Aymarah Limited | Professional & scientific | 2024 |
| Ayngaran Video Ltd | Information & communication | 2023 |
| AYO Care Limited | Education | 2026 |
| Ayra Events Ltd | Other services | 2021 |
| Ayra Tuition Center Ltd | Education | 2024 |
| Ayre Properties Limited | Hospitality | 2015 |
| Ayres International Limited | Manufacturing | 2015 |
| Aysu Holdings Limited | Real estate | 2026 |
| Ayur Beauty Plus Limited | Other services | 2013 |
| Ayuspa Group Limited | Financial services | 2019 |
| Ayuspa Therapy Limited | Health & social care | 2019 |
| Ayvi Realty Limited | Real estate | 2022 |
| Aywear Limited | Wholesale & retail | 2016 |
| AZ Home Essentials Ltd | Wholesale & retail | 2021 |
| AZ Homes Limited | Real estate | 2000 |
| AZ Medical Education Ltd | Education | 2025 |
| AZ Skincare Ltd | Other services | 2025 |
| AZ Software Solutions Limited | Information & communication | 2020 |
| AZ Trade Consultancy Ltd | Administrative & support | 2023 |
| Azalea Projects Ltd | Construction | 2024 |
| Azalea Property Management Ltd | Professional & scientific | 2022 |
| Azam Electric UK Ltd | Professional & scientific | 2025 |
| Azam Technologies Limited | Information & communication | 2007 |
| AZB Partners Ltd | Professional & scientific | 2019 |
| Azchoicehub Ltd | Wholesale & retail | 2024 |
| Azentra Technologies Ltd | Information & communication | 2025 |
| AZH Zhahir Limited | Real estate | 2023 |
| Azimax Croydon Ltd | Real estate | 2024 |
| Aziz Grocery Ltd | Wholesale & retail | 2015 |
| Azizur R Choudhury Ltd | Professional & scientific | 2019 |
| AZK Services London Ltd | Construction | 2015 |
| AZM Accountancy Services Ltd | Professional & scientific | 2019 |
| Azone Properties Ltd | Real estate | 2023 |
| Azoobi Ltd | Wholesale & retail | 2020 |
| Azuk Limited | Financial services | 2018 |
| Azure Risk Consulting Ltd | Administrative & support | 2016 |
| Azure Wealth Limited | Professional & scientific | 2020 |
| Azuresecurity Limited | Information & communication | 2024 |
| B & G Enterprises Ltd | Wholesale & retail | 2025 |
| B & H Estates (GB) Ltd | Real estate | 2017 |
| B & H Food & Wine Ltd | Wholesale & retail | 2014 |
| B & N Properties Holding Company Limited | Construction | 2025 |
| B & P Formation Limited | Information & communication | 2014 |
| B 4 Brothers Ltd | Construction | 2019 |
| B a P Estate Management Limited | Financial services | 2023 |
| B a P Properties Limited | Real estate | 2019 |
| B Abbasi Ltd | Professional & scientific | 2022 |