| Auxilium Advisory Limited | Professional & scientific | 2008 |
| Auxilium Capital Limited | Professional & scientific | 2019 |
| AV Apartments Ltd | Administrative & support | 2017 |
| AV Medical Services Ltd | Health & social care | 2025 |
| AV Rooms Southport Ltd | Administrative & support | 2020 |
| Avaco Commercial Services Ltd | Professional & scientific | 2024 |
| Avalon (Knutsford) Limited | Real estate | 2017 |
| Avaloura Ltd | Wholesale & retail | 2026 |
| Avance Advisory Limited | Professional & scientific | 2026 |
| Avant (GB) Limited | Construction | 2002 |
| Avant Avenir Design Ltd | Professional & scientific | 2024 |
| Avant-Garde Global Limited | Wholesale & retail | 2018 |
| Avantis Direct Ltd | Wholesale & retail | 2025 |
| Avar Mart Ltd | Construction | 2025 |
| Avara Projects Limited | Construction | 2025 |
| Avatar Properties Limited | Real estate | 2020 |
| Avco Trading Limited | Wholesale & retail | 2023 |
| Avdaj Estates Limited | Real estate | 2024 |
| Avenak Consulting Limited | Information & communication | 2014 |
| Avenida Consultancy Ltd | Information & communication | 2014 |
| Aventus Flooring Ltd | Construction | 2023 |
| Aventus Living LLP | | 2020 |
| Avenue Apartments AP Limited | Real estate | 2020 |
| Avenue Capital Dubai Ltd | Financial services | 2023 |
| Avenue Terrace Management Company Limited | Households | 1989 |
| Averis Health Limited | Public administration | 2025 |
| Aviation Technical Support Limited | Manufacturing | 2004 |
| Avid Certification Services Limited | Professional & scientific | 2023 |
| Avido Consulting Ltd | Administrative & support | 2011 |
| Aviewon Ltd | Wholesale & retail | 2012 |
| Aviocean Limited | Professional & scientific | 2024 |
| Avizon Ltd | Wholesale & retail | 2024 |
| Avmn New Enterprise Ltd | Hospitality | 2024 |
| Avms Properties Limited | Real estate | 2024 |
| Avondale Embedded Limited | Information & communication | 2017 |
| Avondale Technologies Ltd | Information & communication | 2018 |
| AVQ Properties Ltd | Real estate | 2026 |
| Avril Properties Ltd | Real estate | 2017 |
| Avsl (North West) Limited | Wholesale & retail | 2017 |
| AVX Motors Ltd | Wholesale & retail | 2025 |
| AW Insights Ltd | Professional & scientific | 2024 |
| Awais Traders Limited | Wholesale & retail | 2019 |
| Await Digital Ltd | Information & communication | 2019 |
| Awaly Investments Ltd | Households | 2024 |
| Awan Construction Ltd | Construction | 2023 |
| Awan IT PM Ltd | Information & communication | 2015 |
| Awan Properties Manchester Ltd | Real estate | 2017 |
| Awan Trade and Services Ltd | Wholesale & retail | 2012 |
| Award Sounds Limited | Professional & scientific | 2005 |
| Aware Television Limited | Information & communication | 2011 |
| AWD Technologies Ltd | Information & communication | 2009 |
| Awesome Creative Ltd | Professional & scientific | 2014 |
| Aweways Property Management Consultancy Limited | Real estate | 2019 |
| AWR Skiphire Ltd | Water & waste | 2023 |
| AWS Management Consultancy Limited | Professional & scientific | 2015 |
| AWZ Group Ltd | Wholesale & retail | 2026 |
| AX Engineering Ltd | Construction | 2022 |
| AXC Ltd | Professional & scientific | 2019 |
| AXE and Sledge Supplements Limited | Wholesale & retail | 2023 |
| Axelle Advisory Limited | Professional & scientific | 2024 |
| Axelle Investments Limited | Real estate | 2024 |
| Axient Consulting Limited | Professional & scientific | 2004 |
| Axion Continuum Ltd | Professional & scientific | 2025 |
| Axis Performing Arts Ltd | Education | 2017 |
| Axis Platforms & Technologies Ltd | Information & communication | 2026 |
| Axis Tower Screen Limited | Real estate | 2018 |
| Axonex Ltd | Information & communication | 2005 |
| AYA Medical Services Ltd | Health & social care | 2025 |
| AYA Revolution Limited | Other services | 2008 |
| Ayaana MCR Ltd | Other services | 2016 |
| Ayah Catering Limited | Hospitality | 2026 |
| Ayat & Ameera Group Ltd | Health & social care | 2026 |
| Ayersio Services Limited | Professional & scientific | 2024 |
| Aylmer Limited | Real estate | 2002 |
| Aymex Leather Limited | Wholesale & retail | 2026 |
| AYN Traders Ltd | Wholesale & retail | 2014 |
| Ayres Waters Limited | Professional & scientific | 2026 |
| Aysha Enterprises Ltd | Wholesale & retail | 2024 |
| AYZ Waste Solutions Limited | Water & waste | 2024 |
| AZ Pest Control Ltd | Administrative & support | 2024 |
| Aziz Consultants Ltd | Education | 2026 |
| Aziz Gulamhusein Urology Ltd | Health & social care | 2021 |
| AZK Blueprint Solutions Ltd | Professional & scientific | 2023 |
| AZK Marketing Ltd | Information & communication | 2023 |
| Azra Strategy & Delivery Ltd | Professional & scientific | 2024 |
| Azsmar Ltd | Wholesale & retail | 2026 |
| Aztec Properties Ltd | Real estate | 2019 |
| Aztha Ltd. | Wholesale & retail | 2025 |
| Azur Villas Limited | Real estate | 1998 |
| Azure Print Developments Limited | Construction | 2025 |
| B & B Projects (NW) Limited | Real estate | 2013 |
| B & F Autos (NW) Ltd | Wholesale & retail | 2019 |
| B & I Fell Investments Limited | Financial services | 2014 |
| B & M Keshwala Properties Ltd | Extraterritorial | 2012 |
| B & M Property Holdings Limited | Real estate | 2016 |
| B & N Decorating Ltd | Construction | 2017 |
| B & N Maintenance Limited | Other services | 2014 |
| B & P Summers Accountants Limited | Professional & scientific | 2024 |
| B & S Stockport Limited | Real estate | 2019 |
| B & T Promotions Limited | Wholesale & retail | 2015 |