| Atlasfin Accountants Ltd | Professional & scientific | 2023 |
| Atmosfera Events Limited | Administrative & support | 2023 |
| Atom Engineering Group Ltd | Professional & scientific | 2021 |
| Atom Homes Limited | Real estate | 2023 |
| Atonis Limited | Real estate | 2019 |
| Atori Group Ltd | Professional & scientific | 2025 |
| Atoz Works Ltd | Construction | 2025 |
| AU Profix Ltd | Construction | 2025 |
| Aubrey Road Properties Ltd | Real estate | 2026 |
| Audacious Church | Other services | 2008 |
| Audacious Publishing Ltd | Information & communication | 2019 |
| Audacious Trading Ltd | Wholesale & retail | 2025 |
| Audio Always Limited | Professional & scientific | 2012 |
| Audio Mechanixx Ltd | Information & communication | 2019 |
| Auditix Ltd | Professional & scientific | 2026 |
| AUN Properties Ltd | Real estate | 2022 |
| Auntie Jojo Stories Ltd | Health & social care | 2026 |
| Auntie Lous Ltd | Hospitality | 2025 |
| Aura PVT Ltd | Manufacturing | 2022 |
| Aura RE Holdings Limited | Construction | 2024 |
| Aura Real Estate Investments Limited | Financial services | 2024 |
| Auraly Home Ltd | Wholesale & retail | 2026 |
| Aurangzeb Ltd | Wholesale & retail | 2021 |
| Aureli Jewellery Limited | Wholesale & retail | 2024 |
| Aurelius Antiquity Limited | Health & social care | 2022 |
| Aurora Elite Dance Academy CIC | Education | 2024 |
| Aurora Power Consulting Ltd. | Professional & scientific | 2007 |
| Austin Banda Properties Ltd | Real estate | 2024 |
| Austin Brokerage Ltd | Professional & scientific | 2016 |
| Austin Holdings NW Ltd | Real estate | 2022 |
| Austin Management NW Ltd | Real estate | 2013 |
| Austin Refurbishment Ltd | Administrative & support | 2016 |
| Australian Events Ltd | Hospitality | 2020 |
| Authentic Fashion Designers Ltd | Other services | 2015 |
| Auto Body Collections Ltd | Water & waste | 2024 |
| Auto Comfort Limited | Administrative & support | 2020 |
| Auto Compass Ltd | Wholesale & retail | 2026 |
| Auto Testing Services Ltd. | Information & communication | 2015 |
| Autofit Garage Limited | Wholesale & retail | 2018 |
| Autofix Garages MCR Ltd | Extraterritorial | 2013 |
| Autofleet (NW) Limited | Administrative & support | 2011 |
| Autofleet Group Ltd | Real estate | 2019 |
| Autohub MCR Ltd | Wholesale & retail | 2023 |
| Automation Advisory Service Limited | Professional & scientific | 2010 |
| Automill Limited | Wholesale & retail | 2022 |
| Autotrim Limited | Other services | 1996 |
| Auxano Services Ltd | Professional & scientific | 2024 |
| Auxilios Logistics Limited | Transport & logistics | 2020 |
| Auxo Business Consultancy Limited | Administrative & support | 2025 |
| Auxradio Ltd | Professional & scientific | 2025 |
| AV Vantage Group Ltd | Wholesale & retail | 2026 |
| AV Yeshia Ltd | Health & social care | 2026 |
| Avalon Bidco Limited | Financial services | 2026 |
| Avalon Topco Limited | Financial services | 2026 |
| Avancea Consulting Ltd | Professional & scientific | 2026 |
| Avant-Garde Drylining Limited | Construction | 2024 |
| Avantex Limited | Wholesale & retail | 2000 |
| Avanti Grid Limited | Energy | 2021 |
| Avar Holdings Limited | Construction | 2026 |
| Avar NW Homes Limited | Construction | 2026 |
| Avari Civil Engineering Limited | Construction | 2026 |
| Avari Construction Limited | Construction | 2026 |
| Avari Holdings Limited | Construction | 2021 |
| Avari Homes Limited | Construction | 2021 |
| Avari Partnerships Limited | Construction | 2026 |
| Avari Partnerships SPV 3 Limited | Construction | 2022 |
| Avari Partnerships SPV 4 Limited | Construction | 2022 |
| Avastro Limited | Manufacturing | 2021 |
| Avda Legal Ltd | Professional & scientific | 2019 |
| Aveleen Rose Ltd | Information & communication | 2015 |
| Aven Estates Ltd | Real estate | 2017 |
| Aventis Solutions Limited | Wholesale & retail | 2011 |
| Averill Limited | Extraterritorial | 2003 |
| Avery Stain Clothing Limited | Wholesale & retail | 2023 |
| Avesta Hair Ltd | Other services | 2021 |
| Avesta Investment Properties Limited | Real estate | 2023 |
| AVI Properties Limited | Real estate | 2020 |
| AVI Rosenfeld Limited | Real estate | 2024 |
| Avid Hire Limited | Administrative & support | 2007 |
| Aviko (UK) Limited | Professional & scientific | 1990 |
| Avinat LLP | | 2017 |
| Avior Assets Limited | Real estate | 2022 |
| Avirue Investments Limited | Real estate | 2026 |
| Avis Estates Limited | Real estate | 2024 |
| Aviv Estates Limited | Real estate | 2017 |
| Avnei Tzedek Estate Ltd | Real estate | 2026 |
| Avnei Tzedek Limited | Other services | 2023 |
| Avnte Consulting Limited | Wholesale & retail | 2025 |
| Avonsoft Limited | Other services | 2015 |
| Avraham Pines Kosher Service Ltd | Professional & scientific | 2024 |
| Avril’S Vibe Ltd | Wholesale & retail | 2025 |
| Avya Smiles Limited | Health & social care | 2025 |
| AW Prime Estates Ltd | Real estate | 2024 |
| AW Property House Ltd | Real estate | 2025 |
| Awadex 2 Limited | Extraterritorial | 2017 |
| Awadex Limited | Extraterritorial | 2016 |
| Awaistalha Limited | Wholesale & retail | 2025 |
| AWC Consult. Ltd | Wholesale & retail | 2016 |
| Awon Boys Limited | Wholesale & retail | 2025 |
| Awtc Ltd | Professional & scientific | 2011 |