| Ag&Sons Construction Ltd | Construction | 2020 |
| AGB Haulier Ltd | Transport & logistics | 2019 |
| AGE UK Hillingdon Services Limited | Health & social care | 2010 |
| AGE UK Hillingdon, Harrow and Brent | Health & social care | 1995 |
| Agile Gurus Limited | Professional & scientific | 2011 |
| Agithan Properties Ltd | Real estate | 2017 |
| AGJ Local Limited | Wholesale & retail | 2024 |
| AGJ PVT Ltd | Wholesale & retail | 2023 |
| AGL Homes Ltd | Construction | 2020 |
| AGM Enterprise Ltd | Wholesale & retail | 2018 |
| AGM General Construction Ltd | Construction | 2023 |
| AGS Electrical Services (UK) Ltd | Construction | 2015 |
| AGS Power Solution Limited | Wholesale & retail | 2020 |
| AGS Ventures Ltd | Professional & scientific | 2025 |
| AH Proprietors Ltd | Real estate | 2025 |
| Ahadshakeel Ltd | Wholesale & retail | 2024 |
| Aharam Ltd | Real estate | 2024 |
| Ahava Market Place Ltd | Wholesale & retail | 2024 |
| Ahc-M Dubai Limited | Financial services | 2022 |
| AHK Construction Ltd | Construction | 2024 |
| Ahluwalia Investments Ltd | Real estate | 2025 |
| Ahmad GAS Works Ltd | Other services | 2023 |
| Ahmad Usman Ltd | Wholesale & retail | 2024 |
| Ahsan Management Ltd | Hospitality | 2019 |
| AHT Development Ltd | Construction | 2021 |
| Ahuja Property Limited | Real estate | 2026 |
| AI Building & Roofing Ltd | Construction | 2025 |
| AI Gaming Limited | Information & communication | 2019 |
| AI Nxtgen Homes Ltd | Construction | 2022 |
| AIA Hospitality Group Limited | Hospitality | 2020 |
| Aibda Limited | Professional & scientific | 2009 |
| Aidan Price Plumbing Ltd | Construction | 2025 |
| Aidantrading Ltd | Transport & logistics | 2019 |
| AIM Food Solutions Ltd | Transport & logistics | 2022 |
| Aims Beauty Ltd | Other services | 2025 |
| Aims Financial Services Limited | Financial services | 2016 |
| Aims Trade Ltd | Wholesale & retail | 2021 |
| Ainz Consultants Ltd | Construction | 2021 |
| AIP Group Ltd | Wholesale & retail | 2026 |
| Air & Sea Logistics Ltd | Transport & logistics | 2024 |
| Air Cargo Services Limited | Manufacturing | 2007 |
| Air-Con Electro Engineering Ltd | Construction | 2026 |
| Airdrie Property Investments Ltd | Real estate | 2016 |
| Airhiveuk Ltd | Construction | 2025 |
| Airkar Limited | Transport & logistics | 2015 |
| Airlink Hotel & Banqueting Suite Ltd | Hospitality | 2013 |
| Airlink Supplier Ltd | Wholesale & retail | 2025 |
| Airport Chauffeurs Ltd | Transport & logistics | 2024 |
| Airport Concierge Ltd. | Extraterritorial | 2003 |
| Airport Extras Ltd | Other services | 2019 |
| Airport Link Transfers Ltd | Transport & logistics | 2025 |
| Airport Minicab UK Limited | Transport & logistics | 2025 |
| Airport VIP Services Limited | Other services | 2009 |
| Airpro Climate & Heating Ltd | Construction | 2026 |
| Airspeed International Limited | Real estate | 1999 |
| Airxpress Logistics Ltd | Transport & logistics | 2025 |
| Airè LDN Limited | Wholesale & retail | 2025 |
| Aishdilu Limited | Real estate | 2025 |
| Aivimat Ltd | Information & communication | 2026 |
| AJ Prestige Building Company Ltd | Construction | 2022 |
| AJ Prime Meats Ltd. | Wholesale & retail | 2024 |
| AJ Productions Ltd | Information & communication | 2021 |
| AJ Rapture Limited | Other services | 2024 |
| AJA PVT Ltd | Real estate | 2024 |
| Ajay Textile Mills Ltd | Wholesale & retail | 2022 |
| Ajdhp Limited | Construction | 2026 |
| Ajinth Building Repairs Ltd | Construction | 2025 |
| Ajinx Studios Limited | Information & communication | 2024 |
| Ajit Bedroom & Kitchen Ltd | Manufacturing | 2021 |
| Ajjjk Enterprises Ltd | Wholesale & retail | 2025 |
| Ajlsoft Limited | Information & communication | 2012 |
| AJS Property Enterprises Limited | Construction | 2017 |
| Ajuk Ltd | Other services | 2019 |
| Ajuni Holdings Ltd | Real estate | 2015 |
| Ajuni Investments Ltd | Other services | 2021 |
| AK Skills Ltd | Education | 2019 |
| AK & REV Limited | Wholesale & retail | 2022 |
| AK 7 London Management Ltd | Real estate | 2024 |
| AK Arish Ltd | Hospitality | 2024 |
| AK Bright Ltd | Administrative & support | 2026 |
| AK Builders Merchants Ltd | Wholesale & retail | 2012 |
| AK Cash for Clothes Limited | Wholesale & retail | 2023 |
| AK Chauffeur Service Ltd | Transport & logistics | 2022 |
| AK Constructions London Ltd | Construction | 2020 |
| AK Design Interiors Limited | Manufacturing | 2024 |
| AK Digital Solutions Ltd | Wholesale & retail | 2026 |
| AK Digital Traders Ltd | Wholesale & retail | 2026 |
| AK Estatica Ltd | Other services | 2026 |
| AK European Real Estate Limited | Real estate | 2020 |
| AK Group London Ltd | Wholesale & retail | 2025 |
| AK Home Investment Limited | Real estate | 2023 |
| AK Hospitality & Events Ltd | Hospitality | 2025 |
| AK Household Essentials Ltd | Wholesale & retail | 2020 |
| AK Plastics & Plumbing Materials Ltd | Wholesale & retail | 2018 |
| AK Project Services Ltd | Professional & scientific | 2025 |
| AK Property House Ltd | Real estate | 2020 |
| AK Randhawa Properties Ltd | Real estate | 2024 |
| AK Staircase Ltd | Construction | 2025 |
| AK Techsys Ltd | Professional & scientific | 2022 |
| AK Transportation Services Ltd | Transport & logistics | 2022 |