| Aaran Solutions Limited | Information & communication | 2023 |
| Aaravs Florist Services Ltd | Wholesale & retail | 2025 |
| Aarons Homes Limited | Real estate | 2025 |
| Aarons Kitchen Ltd | Hospitality | 2018 |
| AB Hayer Properties Limited | Real estate | 2024 |
| AB Spice Ltd | Hospitality | 2017 |
| AB Trade Construction Ltd | Construction | 2020 |
| AB29 Renovation Ltd | Construction | 2024 |
| Abaya Mahal Ltd | Wholesale & retail | 2023 |
| Abheenas and Co Ltd | Wholesale & retail | 2025 |
| Abhi Contractors Ltd | Construction | 2018 |
| Abicap Healthcare Ltd | Health & social care | 2013 |
| Able Carpets Limited | Wholesale & retail | 2004 |
| ABS Ceesay Fitness Ltd | Wholesale & retail | 2025 |
| Abunu Ltd | Health & social care | 2021 |
| ABZ Childcare Ltd | Health & social care | 2015 |
| ACC Group Ltd | Water & waste | 2024 |
| Accident Repair Clinic Ltd | Administrative & support | 2017 |
| ACE47 Limited | Real estate | 2024 |
| Aces Records Limited | Manufacturing | 2021 |
| Aceswift Consult Ltd | Wholesale & retail | 2023 |
| Achievers Group UK Ltd | Agriculture & fishing | 2024 |
| Achievers Software Solutions Ltd | Information & communication | 2023 |
| ACL (2002) Limited | Manufacturing | 2002 |
| Aconvo Ltd | Real estate | 2025 |
| Acorns to Mighty Oaks Ltd | Health & social care | 2011 |
| Action Drains Limited | Other services | 1994 |
| Active Freight Ltd | Transport & logistics | 2025 |
| Active JTR Ltd | Construction | 2025 |
| Activeperspectives Limited | Education | 2022 |
| AD Global Commerce Ltd | Wholesale & retail | 2025 |
| Adam's Bits & Bobs Ltd | Wholesale & retail | 2026 |
| Adams Roofing Co. Limited | Construction | 1969 |
| Adderley Interiors Ltd | Construction | 2020 |
| Ade&Grace Ltd | Information & communication | 2017 |
| Adith Healthcare Ltd | Health & social care | 2020 |
| Adonai Investments Limited | Financial services | 2026 |
| Adonai Management Limited | Real estate | 2026 |
| ADR Sofas Ltd | Manufacturing | 2026 |
| Adrian Invest Ltd | Wholesale & retail | 2024 |
| ADS Deol Builders Ltd | Construction | 2020 |
| Adullam Social Enterprises C.I.C. | Administrative & support | 2016 |
| Advanced Martial Arts Ltd | Arts & recreation | 2024 |
| Adwin Holdings Limited | Financial services | 2021 |
| Affordable Dreams Limited | Real estate | 2019 |
| AFG4N Ltd | Wholesale & retail | 2025 |
| AFK Restaurant Ltd | Hospitality | 2025 |
| Afro Caribbean Intl Ltd | Wholesale & retail | 2025 |
| Afro Cosmetics Westbromwich Limited | Wholesale & retail | 2025 |
| Afz-Autos Ltd | Wholesale & retail | 2020 |
| AG Sandhu Properties Ltd | Real estate | 2025 |
| AG100 Distribution Ltd | Wholesale & retail | 2025 |
| Agam Home Builders UK Ltd | Construction | 2023 |
| Agamvir Courier Service Ltd | Transport & logistics | 2024 |
| AGE Related Diseases and Health Trust Ltd | Health & social care | 2007 |
| AGEM2026 Ltd | Hospitality | 2026 |
| Agob Ltd | Wholesale & retail | 2023 |
| AHM Overseas Ltd | Professional & scientific | 2024 |
| Ahmed Financial Accountants Ltd | Professional & scientific | 2019 |
| Ahmeds Propertiess Ltd | Real estate | 2024 |
| AHS Ventures Ltd | Wholesale & retail | 2025 |
| AI Monster Ltd | Information & communication | 2026 |
| AIM Real Estates Limited | Real estate | 2020 |
| Air Brake Products Limited | Extraterritorial | 2013 |
| Air Industrial Developments Limited | Manufacturing | 1998 |
| Air Store U.K. Ltd | Wholesale & retail | 2025 |
| Airline Travels Limited | Administrative & support | 2013 |
| Airport Travel & Tour Ltd | Administrative & support | 2019 |
| Airs Telecoms Limited | Wholesale & retail | 2025 |
| AJ and Sons Estates Ltd | Real estate | 2020 |
| AJ Architectural Pressings Ltd | Manufacturing | 2015 |
| AJ Clothing Midlands Ltd | Wholesale & retail | 2018 |
| AJ Facades Ltd | Manufacturing | 2018 |
| AJ Investment Property Ltd | Real estate | 2023 |
| AJ Transport Midland Ltd | Transport & logistics | 2019 |
| Ajay & Associates Tax Accountants Limited | Real estate | 2005 |
| AJB Transport Midlands Ltd | Transport & logistics | 2025 |
| Ajit Development Ltd | Construction | 2023 |
| Ajna-Dhan Ltd | Arts & recreation | 2025 |
| AJR Heating Ltd | Construction | 2020 |
| AK & VK Properties Ltd | Real estate | 2024 |
| AK Auto Care Limited | Extraterritorial | 2015 |
| AK Auto Stop Limited | Wholesale & retail | 2012 |
| AK Beautyfly Ltd | Other services | 2025 |
| AK Decoras Ltd | Construction | 2024 |
| AK Haulage and Logistics Limited | Transport & logistics | 2023 |
| AK Heating and Building Ltd | Construction | 2023 |
| AK Legacy Ventures Ltd | Wholesale & retail | 2025 |
| AK Pallets Recycling Ltd | Manufacturing | 2022 |
| AK Salvage and Spares Limited | Wholesale & retail | 2015 |
| AK Tanda Constructions Limited | Construction | 2020 |
| Akaal Clothing Manufacture Ltd | Wholesale & retail | 2024 |
| Akash Glazing Ltd | Construction | 2021 |
| Akbrotherstransport Ltd | Transport & logistics | 2025 |
| AKCOMMERCIAL75 Ltd | Wholesale & retail | 2026 |
| Akkh Associates Ltd | Professional & scientific | 2024 |
| Akmp Limited | Real estate | 2025 |
| AKP Property Limited | Real estate | 2020 |
| Akshar Immigration Consultancy Ltd | Other services | 2025 |
| AL Ajeel Ltd | Construction | 2017 |