| Ajax Couriers WM Ltd | Transport & logistics | 2020 |
| Ajay Cutz Ltd | Other services | 2026 |
| Ajmaria Ltd | Construction | 2018 |
| Ajmn Ltd | Wholesale & retail | 2025 |
| AJN Projects Ltd | Construction | 2025 |
| AJN Properties NW Ltd | Real estate | 2025 |
| AJR Properties WM Ltd | Real estate | 2026 |
| AJS Profiles Holdings Limited | Professional & scientific | 2013 |
| AJS Profiles Limited | Administrative & support | 1998 |
| AJS Window Installations Limited | Construction | 2015 |
| Ajunilogistic Ltd | Transport & logistics | 2025 |
| AK Auto GAS Limited | Wholesale & retail | 2023 |
| AK BIM Ltd | Information & communication | 2020 |
| AK FBA Limited | Wholesale & retail | 2025 |
| AKA Optics Ltd | Health & social care | 2021 |
| Akaar Living Ltd | Real estate | 2026 |
| Akaash Travel Ltd | Transport & logistics | 2015 |
| Akal Sahai Properties Ltd | Real estate | 2022 |
| Akara Boyz Ltd | Hospitality | 2025 |
| Akarma Housing Association Limited | Hospitality | 2019 |
| AKB Development Group Ltd | Construction | 2026 |
| Akgul Ltd | Hospitality | 2016 |
| AKI GRP Limited | Extraterritorial | 2011 |
| Akiko Store Ltd | Wholesale & retail | 2021 |
| Akindex Limited | Extraterritorial | 2024 |
| AKK Building Services Ltd | Construction | 2024 |
| AKK Recruitment Ltd | Administrative & support | 2025 |
| AKM Trans Ltd | Transport & logistics | 2019 |
| AL Asad Import & Export Limited | Wholesale & retail | 2026 |
| AL BTR Limited | Professional & scientific | 2022 |
| AL Buruj Media Services Limited | Information & communication | 2026 |
| AL Fida Ltd | Wholesale & retail | 2022 |
| AL Hekma Academy for Integrated Sciences Ltd | Administrative & support | 2020 |
| AL Jannah Travel Ltd | Administrative & support | 2025 |
| AL Medicines Limited | Wholesale & retail | 2014 |
| AL Qabr Cleaning Services Ltd | Administrative & support | 2025 |
| Al-Ashter Trading Ltd | Wholesale & retail | 2025 |
| Al-Habib Texere (PVT.) Ltd. | Wholesale & retail | 2025 |
| Al-Kisa Limited | Wholesale & retail | 2024 |
| Al-Tareb Properties Ltd | Real estate | 2026 |
| Al-Tareeb Properties Ltd | Real estate | 2026 |
| ALA Reworks Limited | Construction | 2025 |
| Aladdins Sweets Distribution Limited | Wholesale & retail | 2024 |
| Aladdins Sweets Ltd | Wholesale & retail | 2018 |
| Alazain Limited | Administrative & support | 2017 |
| Albatrosses Limited | Extraterritorial | 2018 |
| Albion Couriers Limited | Transport & logistics | 2018 |
| Aldn Limited | Real estate | 2015 |
| Alees Tropical Rags Ltd | Wholesale & retail | 2013 |
| Alex Prestige Transport Limited | Transport & logistics | 2022 |
| Alex&Son Logistics Ltd | Transport & logistics | 2013 |
| Alexander Road 1957 Limited | Extraterritorial | 2014 |
| Alexis Fashion UK Ltd | Wholesale & retail | 2020 |
| Alfa Freight Ltd | Transport & logistics | 2026 |
| ALI Prime Mart Ltd | Wholesale & retail | 2025 |
| Alihaq Timber & Roofing Supplies Ltd | Construction | 2017 |
| Alima Travel Ltd | Transport & logistics | 2023 |
| Alin M Logistics Limited | Transport & logistics | 2020 |
| Alis Trading Limited | Wholesale & retail | 2025 |
| Alistic Limited | Transport & logistics | 2025 |
| Alizamin Ltd | Wholesale & retail | 2026 |
| ALL 13 Ltd | Real estate | 2025 |
| ALL Eyez on ME Limited | Other services | 2012 |
| ALL Great Limited | Real estate | 2016 |
| ALL Occasions Fulfilment Limited | Wholesale & retail | 2022 |
| ALL Return Ltd | Real estate | 2014 |
| ALL Services Midland Ltd | Other services | 2025 |
| All-In-One Marketplace Ltd | Wholesale & retail | 2023 |
| Allegrotrans Ltd | Transport & logistics | 2026 |
| Allen Construction and Supplies Ltd | Construction | 2022 |
| Allied Air Limited | Professional & scientific | 2003 |
| Allied Freight (UK) Limited | Professional & scientific | 2003 |
| Allied International Properties Ltd | Real estate | 2014 |
| Allied International Trading Limited | Wholesale & retail | 1996 |
| Alma Team Services Ltd | Transport & logistics | 2018 |
| Almaas Limited | Wholesale & retail | 2025 |
| Almalco Ltd | Professional & scientific | 2023 |
| ALN Transport Ltd | Transport & logistics | 2026 |
| Alpha Contracting Ltd | Construction | 2023 |
| Alpha Corporate Branding Ltd | Manufacturing | 2017 |
| Alright BOY Productions Limited | Administrative & support | 2026 |
| ALS TM Ltd | Transport & logistics | 2023 |
| Altun Tower Supermarket Ltd | Wholesale & retail | 2025 |
| Alum Optical Ltd | Wholesale & retail | 2016 |
| Aluminium Online Limited | Manufacturing | 2020 |
| Alvacen Limited | Transport & logistics | 2025 |
| Always Ahead Midlands Limited | Transport & logistics | 2024 |
| AM Auto Services Ltd | Wholesale & retail | 2025 |
| AMA Couriers U.K. Ltd | Transport & logistics | 2023 |
| AMA Food Trading Ltd | Hospitality | 2024 |
| Amaan Auto Repairs Limited | Wholesale & retail | 2022 |
| Amal AET Trades Limited | Wholesale & retail | 2026 |
| Aman Events Ltd | Hospitality | 2025 |
| Amanda Owen Meehan Consulting Ltd | Education | 2018 |
| Amazing Deals UK Ltd | Wholesale & retail | 2020 |
| Ambala Traders Ltd | Transport & logistics | 2025 |
| Amber Coaches Ltd | Transport & logistics | 2025 |
| Amber Computers Ltd | Construction | 2020 |
| Amber Doors & Loading Bay Services Limited | Manufacturing | 2001 |
| Amber Executive Cars Limited | Transport & logistics | 2016 |