| Aftermarket Parts Ltd | Wholesale & retail | 2021 |
| Afterz Ltd | Wholesale & retail | 2026 |
| AG Cakes Limited | Manufacturing | 2025 |
| AG Cambrook Developments Ltd | Construction | 2025 |
| AG Join Limited | Real estate | 2024 |
| AG Praise Ltd | Other services | 2017 |
| AGE Electrical Ltd | Construction | 2023 |
| Agelectonics Ltd | Wholesale & retail | 2018 |
| Agency Shop Ltd | Manufacturing | 1999 |
| Agile Octopus Security Ltd | Administrative & support | 2019 |
| Aglow Accommodations Ltd | Hospitality | 2018 |
| Agnes Permanent Ltd | Other services | 2022 |
| Agodico Investments UK Limited | Financial services | 2024 |
| Agop Wholesale Ltd | Wholesale & retail | 2023 |
| Agorasphere Limited | Wholesale & retail | 2024 |
| Agraharam Roots & Recipes Limited | Manufacturing | 2025 |
| Agtn Ltd | Wholesale & retail | 2021 |
| AGZ Social Care Limited | Health & social care | 2015 |
| AH Global Consultancy Services Ltd | Extraterritorial | 2021 |
| AH Global Network Ltd | Professional & scientific | 2025 |
| AH Livings International Ltd | Hospitality | 2024 |
| AH Property FIX Ltd | Construction | 2023 |
| AHA Global Limited | Wholesale & retail | 2020 |
| AHC London Ltd | Wholesale & retail | 2020 |
| Ahmed Enterprise London Ltd | Other services | 2024 |
| Ahmed Raza Global Group Limited | Wholesale & retail | 2026 |
| Ahmedalsultan Perfumes Ltd | Wholesale & retail | 2025 |
| AHS Courier & Removals Ltd | Transport & logistics | 2013 |
| AHS Imports Ltd | Wholesale & retail | 2018 |
| Ahsan E Sales Ltd | Wholesale & retail | 2026 |
| Ahsan Nawaz Traders Limited | Wholesale & retail | 2026 |
| AI & Tech Holdings Ltd | Information & communication | 2025 |
| Ai-New Standard Ltd | Construction | 2019 |
| Aiconic Vision Limited | Wholesale & retail | 2025 |
| AIE Property Limited | Real estate | 2025 |
| Aied Data & Delivery Solutions Ltd | Information & communication | 2024 |
| Aikbul Building Limited | Construction | 2017 |
| Aimz Direct Limited | Wholesale & retail | 2021 |
| AIO Construction & Development Ltd | Construction | 2017 |
| Air Vision Pictures Limited | Information & communication | 2025 |
| Airbraga Ltd | Real estate | 2017 |
| Airport Ride Transfers Ltd | Transport & logistics | 2022 |
| Airtel Construction Ltd | Construction | 2014 |
| Airvue Limited | Transport & logistics | 2022 |
| Aisha Associates Limited | Professional & scientific | 2012 |
| Aisha Beauty and Hair Salon Limited | Other services | 2026 |
| Aisha's Pakwan Limited | Hospitality | 2021 |
| Aisphere Ltd | Information & communication | 2021 |
| AJ Building Services (S.E.) Ltd | Construction | 2018 |
| AJ Heating Ltd | Construction | 2022 |
| AJ Luxe Limited | Wholesale & retail | 2025 |
| AJ Perfumery Ltd | Wholesale & retail | 2022 |
| AJ Technical Services Ltd | Energy | 2026 |
| AJE Infrastructure Services Limited | Construction | 1997 |
| Ajibs Consulting Ltd | Professional & scientific | 2017 |
| AK Advisories Ltd | Financial services | 2026 |
| AK Bedding Solutions Limited | Wholesale & retail | 2024 |
| AK Cleaning Services Ltd Limited | Administrative & support | 2015 |
| AK Fashion Studios Ltd | Wholesale & retail | 2018 |
| AK Security Solutions Limited | Administrative & support | 2015 |
| AK Stock Trader Limited | Wholesale & retail | 2024 |
| AK9 Security and FM Solutions Ltd | Other services | 2017 |
| AKA Double Glazing London Ltd | Construction | 2025 |
| Akaal Accountants Ltd | Professional & scientific | 2020 |
| Akachukwu Limited | Real estate | 2022 |
| Akanjee Properties Limited | Real estate | 2015 |
| Akbr Group Ltd | Wholesale & retail | 2026 |
| Akdt Construction Ltd | Wholesale & retail | 2025 |
| Akeso Decor Ltd | Construction | 2023 |
| Akgo Ltd | Other services | 2013 |
| AKH Trading Limited | Wholesale & retail | 2025 |
| AKR Housing Solutions Ltd | Real estate | 2019 |
| Akram Food Group Limited | Hospitality | 2026 |
| AKS Investment Group Ltd | Real estate | 2026 |
| AKS Trading Limited | Construction | 2020 |
| Akstarworld Ltd | Wholesale & retail | 2026 |
| Akter Resource Limited | Administrative & support | 2023 |
| Akul Cars Limited | Wholesale & retail | 2018 |
| AL Amal Digital Ltd | Wholesale & retail | 2024 |
| AL Bahja Limited | Wholesale & retail | 2025 |
| AL Building Group Ltd | Construction | 2026 |
| AL Buraq Trading Ltd | Wholesale & retail | 2026 |
| AL Construction Group Ltd | Construction | 2026 |
| AL Hayat Consultancy Ltd | Professional & scientific | 2013 |
| AL Madinah Halal Butchers Ltd | Wholesale & retail | 2018 |
| AL Rayan Developments Limited | Real estate | 2021 |
| AL Wahab 1 Ltd | Wholesale & retail | 2025 |
| AL Zawra Building Materials UK Ltd | Administrative & support | 2018 |
| Al-Amaan Export and Import Co. Ltd | Wholesale & retail | 2005 |
| Al-Nssr Investments Limited | Wholesale & retail | 2025 |
| ALA Business Consultancy Ltd | Administrative & support | 2025 |
| Alabama Contracting UK Limited | Construction | 2016 |
| Alan IT Limited | Information & communication | 2025 |
| ALB Outdoor Solutions Ltd | Administrative & support | 2024 |
| ALB Peterson Ltd | Professional & scientific | 2019 |
| Alba Beds Limited | Manufacturing | 2000 |
| Alba Holdings LLP | | 2021 |
| Albarakah Store Ltd | Wholesale & retail | 2024 |
| Albarny Info Tech Ltd | Information & communication | 2011 |
| Albas Management Limited | Real estate | 2011 |