| Al-Falah Investments Ltd | Construction | 2015 |
| Al-Hijaz Travels & Tours Ltd | Administrative & support | 2023 |
| Al-Hijr Hajj and Umrah Tours Ltd | Administrative & support | 2024 |
| Al-Huda Luton Limited | Education | 2024 |
| Al-Islah Limited | Professional & scientific | 2016 |
| Al-Noor Travels (UK) Limited | Administrative & support | 2012 |
| Al-Quds Grill Ltd | Hospitality | 2017 |
| Al-Rashid Security Skills Ltd | Administrative & support | 2025 |
| Al-Safa Investments Ltd | Real estate | 2016 |
| Al-Sakn Ltd | Real estate | 2024 |
| Al-Yamama Holdings Limited | Professional & scientific | 2018 |
| Al-Yamama Investments Limited | Real estate | 2016 |
| Al-Yamama Limited | Wholesale & retail | 2010 |
| Al-Zaytoun Limited | Other services | 2022 |
| Al-Ziayan Ltd | Wholesale & retail | 2021 |
| Al.Rafay Trading Ltd | Wholesale & retail | 2026 |
| ALA Liviten Limited | Information & communication | 2025 |
| Alag Film Limited | Information & communication | 2023 |
| Alagan Limited | Wholesale & retail | 2025 |
| Alagio Ltd | Construction | 2026 |
| Alain Consultants Ltd | Professional & scientific | 2024 |
| Alam Property Group Ltd | Construction | 2024 |
| Alan George Geddes Limited | Extraterritorial | 2023 |
| Alan Wilson Limited | Wholesale & retail | 1988 |
| Alanjima Facility Solutions Ltd | Extraterritorial | 2024 |
| Alankar Luton Ltd | Extraterritorial | 2015 |
| Alarm Activations Limited | Administrative & support | 2014 |
| Alauddin Sweets Limited | Wholesale & retail | 2025 |
| Albaari SWT Limited | Wholesale & retail | 2026 |
| Albacargo Ltd | Transport & logistics | 2025 |
| Albadar Original Limited | Hospitality | 2022 |
| Alban Transport Ltd | Professional & scientific | 2026 |
| Albani Islamic Society of the UK CIC | Education | 2024 |
| Albans Driveways Ltd | Administrative & support | 2025 |
| Albany Gate P B Management Limited | Households | 2016 |
| Albedo Studio Limited | Extraterritorial | 2015 |
| Albert Barber Academy Ltd | Other services | 2022 |
| Albert&Ale Extension Ltd | Manufacturing | 2025 |
| Alberta Property Services Ltd | Real estate | 2023 |
| Albi Plastering Limited | Construction | 2016 |
| Albion House (Bedford) Management Company Limited | Households | 2022 |
| Albion Tours and Travels Ltd | Administrative & support | 2025 |
| Albion.Xyz Ltd | Manufacturing | 2023 |
| Albu Construction Ltd | Construction | 2025 |
| Albu Services Limited | Construction | 2024 |
| Albu Solutions Ltd | Wholesale & retail | 2024 |
| Alcral Energy & Infrastructure LLP | | 2025 |
| Alcral Gold Trading LLP | | 2025 |
| Alcral Premium LLP | | 2025 |
| Alcral Property Partners LLP | | 2025 |
| Aldababat Services Ltd | Construction | 2019 |
| Aldberry Green Management Company Limited | Households | 2003 |
| Aldershaw Estate Agent Ltd | Real estate | 2020 |
| Aldershaw Property Management Ltd | Real estate | 2019 |
| Aldridge Investments Ltd | Real estate | 2021 |
| Aldwick Building Company Limited | Construction | 1998 |
| Aldwick Property Company Limited | Real estate | 2020 |
| Alea BLU Ltd | Administrative & support | 2023 |
| Aleena Umair Ltd | Professional & scientific | 2024 |
| Aleena's Choice Ltd | Wholesale & retail | 2024 |
| Alessfox Limited | Wholesale & retail | 2025 |
| Alex Care Services Limited | Health & social care | 2018 |
| Alex Dumi Ltd | Transport & logistics | 2026 |
| Alex Fire Ltd | Construction | 2025 |
| Alex PC Repair Worcs Limited | Other services | 2014 |
| Alex Property Services Ltd | Real estate | 2017 |
| Alex Sousa Ltd | Transport & logistics | 2019 |
| Alexa Transport Logistic Ltd | Transport & logistics | 2023 |
| Alexander Aziz Solicitors Limited | Professional & scientific | 2026 |
| Alexander Cake Automotive Consultancy Limited | Wholesale & retail | 2019 |
| Alexander City Holding Limited | Real estate | 2025 |
| Alexandra Helvetica Limited | Information & communication | 2020 |
| Alexandra Portfolio Limited | Real estate | 2025 |
| Alexandru Rez&Co Ltd | Transport & logistics | 2026 |
| Alexervices Ltd | Transport & logistics | 2024 |
| Alexia Estates Management Limited | Construction | 2010 |
| Alexisdinh Ltd | Wholesale & retail | 2025 |
| Alexpoto Ltd | Construction | 2019 |
| Alexson Group Limited | Administrative & support | 2018 |
| Alezosyl Consultancy Ltd | Health & social care | 2023 |
| ALF Build Limited | Construction | 2020 |
| Alfa Brothers Ltd | Wholesale & retail | 2021 |
| Alfa Delivery Ltd | Transport & logistics | 2020 |
| Alfa Legal Services Limited | Professional & scientific | 2025 |
| Alfaraj Ltd | Health & social care | 2026 |
| Algrthmz Limited | Information & communication | 2021 |
| Alhatimy Associates Ltd. | Health & social care | 2014 |
| ALI & Co Accountants Limited | Professional & scientific | 2020 |
| ALI & KAM Investments Ltd | Real estate | 2019 |
| ALI & Miah Limited | Real estate | 2024 |
| ALI 1 Delivery Services Limited | Transport & logistics | 2023 |
| ALI Auto Locksmith Luton Ltd | Wholesale & retail | 2025 |
| ALI Brothers Produce Ltd | Hospitality | 2011 |
| ALI Catering Ltd | Hospitality | 2025 |
| ALI Civil Engineering Construction Ltd | Construction | 2022 |
| ALI Delivery Service Limited | Transport & logistics | 2022 |
| ALI Express Transport Ltd | Transport & logistics | 2015 |
| ALI Investments Group Ltd | Real estate | 2024 |
| ALI Istithmar Ltd | Other services | 2016 |
| ALI Mobile Ltd | Wholesale & retail | 2026 |