| A5D Developments Ltd | Real estate | 2025 |
| A5O Ltd | Health & social care | 2010 |
| A5O Property Ltd | Real estate | 2025 |
| A6 Advertiser Ltd | Professional & scientific | 2022 |
| A6001 Ltd | Real estate | 2020 |
| A62 Sweden Limited | Extraterritorial | 2026 |
| A6S Homes Ltd | Real estate | 2025 |
| A6TAN LLP | | 2023 |
| A6UN Limited | Information & communication | 2015 |
| A7 Azfi Ltd | Administrative & support | 2025 |
| A7 Burco Ltd | Transport & logistics | 2023 |
| A7 Capital Limited | Financial services | 2026 |
| A7 Catalyst Ltd | Wholesale & retail | 2017 |
| A7 Consultancy LLP | | 2023 |
| A7 Developer Ltd | Real estate | 2019 |
| A7 Estates Limited | Real estate | 2024 |
| A7 Europe Ltd | Administrative & support | 2010 |
| A7 Healthcare Limited | Information & communication | 2018 |
| A7 Interactive Limited | Administrative & support | 2007 |
| A7 Properties Management Ltd | Real estate | 2019 |
| A7 Services Ltd | Construction | 2026 |
| A7 Softcore Limited | Information & communication | 2023 |
| A7 Technology & Services Ltd | Wholesale & retail | 2023 |
| A7 Trading Limited | Wholesale & retail | 2024 |
| A7. MED Ltd | Professional & scientific | 2013 |
| A71 Cleaning Services Ltd | Administrative & support | 2025 |
| A72 Labs Ltd | Information & communication | 2024 |
| A73X Ltd | Arts & recreation | 2024 |
| A786 Studio Ltd | Professional & scientific | 2015 |
| A786EDUCATION Ltd | Education | 2019 |
| A786Z Properties Ltd | Real estate | 2024 |
| A7A Ltd | Professional & scientific | 2022 |
| A7DEVELOPMENTS Intl Ltd | Real estate | 2018 |
| A7O Ltd | Professional & scientific | 2022 |
| A7ON Ltd | Professional & scientific | 2026 |
| A8 Capital Limited | Real estate | 2025 |
| A8 Media Group Ltd | Professional & scientific | 2024 |
| A8G Cousins Construction Ltd | Construction | 2025 |
| A8MUF Ltd | Administrative & support | 2014 |
| A8TRONICS Ltd | Wholesale & retail | 2025 |
| A9 Ecom Ltd | Wholesale & retail | 2024 |
| A9 Fragrances Ltd | Wholesale & retail | 2022 |
| A9 Medical Ltd | Health & social care | 2026 |
| A9 Scientific UK German Medical Industry Ltd | Manufacturing | 2023 |
| A90 Media Limited | Administrative & support | 2020 |
| A95 Group Ltd | Arts & recreation | 2024 |
| A9P Ltd | Wholesale & retail | 2025 |
| A: Living Limited | Financial services | 2022 |
| A: Living OKR Limited | Construction | 2022 |
| A@J Mulligan Ltd | Mining & quarrying | 2024 |
| A@V Capricons Ltd | Transport & logistics | 2019 |
| AA & B Property Development Ltd | Real estate | 2026 |
| AA & Co Consultants Limited | Professional & scientific | 2024 |
| AA & K Properties Ltd | Real estate | 2021 |
| AA & Nessa Ltd | Transport & logistics | 2019 |
| AA & R Financial Atelier Limited | Professional & scientific | 2025 |
| AA 21 Ltd | Financial services | 2021 |
| AA 43 Image Limited | Other services | 2019 |
| AA 92 Limited | Hospitality | 2020 |
| AA a Depot Ltd | Transport & logistics | 2026 |
| AA Academy Ltd | Education | 2023 |
| AA Academy TT Ltd | Arts & recreation | 2024 |
| AA Access Consult Ltd | Professional & scientific | 2003 |
| AA Access Limited | Transport & logistics | 2024 |
| AA Access Partnership Limited | Information & communication | 1999 |
| AA Accommodation Services Ltd | Hospitality | 2018 |
| AA Accommodations Ltd | Households | 2023 |
| AA Accountancy Services (London) Limited | Professional & scientific | 2013 |
| AA Accountancy Services (Southgate) Ltd | Professional & scientific | 2020 |
| AA Accountancy Services (UK) Limited | Professional & scientific | 2006 |
| AA Accountants (GBR) Ltd | Professional & scientific | 2024 |
| AA Accounting and Business Solutions Limited | Extraterritorial | 2006 |
| AA Accounting Service Limited | Professional & scientific | 2008 |
| AA Accounts Ltd | Professional & scientific | 2021 |
| AA Adorables Ltd | Wholesale & retail | 2026 |
| AA Advisers LLP | | 2006 |
| AA Advisory Group Ltd | Professional & scientific | 2026 |
| AA Advisory Ltd | Professional & scientific | 2018 |
| AA Airport Transfers Ltd | Transport & logistics | 2025 |
| AA Alignment Ltd | Information & communication | 2022 |
| AA Alltheway Ltd | Transport & logistics | 2022 |
| AA Ambrosia Ltd | Manufacturing | 2025 |
| AA and 9A Limited | Hospitality | 2017 |
| AA Animal Healthcare Ltd | Professional & scientific | 2026 |
| AA Anis Limited | Real estate | 2016 |
| AA Appliances Ltd | Other services | 2021 |
| AA ARC Enterprise Ltd | Wholesale & retail | 2023 |
| AA Architectural Reclaim Ltd | Other services | 2012 |
| AA Artelier Limited | Professional & scientific | 2024 |
| AA Artisan Cafe Limited | Hospitality | 2016 |
| AA Arts Limited | Education | 2017 |
| AA Asset Management Limited | Administrative & support | 2010 |
| AA Atelier Group Ltd | Wholesale & retail | 2025 |
| AA Attractions Ltd | Hospitality | 2026 |
| AA Auto Cars Ltd | Wholesale & retail | 2026 |
| AA Auto FIX Ltd | Wholesale & retail | 2024 |
| AA Auto Hub Limited | Wholesale & retail | 2026 |
| AA Auto Service Ltd | Wholesale & retail | 2017 |
| AA Beauty Station Ltd | Other services | 2025 |
| AA Belle Bleu Limited | Other services | 2020 |