| Acad Services Limited | Professional & scientific | 2015 |
| Acadevis Foreign Education Consultant Limited | Professional & scientific | 2022 |
| Accessories Outlet Ltd | Wholesale & retail | 2011 |
| Accident Solutions (Dartford) Limited | Financial services | 2012 |
| Accountancy Investment and Management Services Ltd | Professional & scientific | 2014 |
| Accountax AID Ltd | Professional & scientific | 2025 |
| Accountax Team Ltd | Professional & scientific | 2023 |
| Accountech Professional Services Limited | Information & communication | 2014 |
| Accuracy Consults Limited | Professional & scientific | 2015 |
| Accurate Care Services Limited | Health & social care | 2013 |
| Accurate Solutions Security Ltd | Professional & scientific | 2017 |
| Acdc London Electrical Ltd | Energy | 2018 |
| Ace Build Solutions Ltd | Construction | 2025 |
| Ace Care & Domestic Recruitment Agency Limited | Administrative & support | 2017 |
| Ace MOT Training Centre Ltd | Education | 2025 |
| Ace Motorworks Ltd | Wholesale & retail | 2024 |
| Ace Sales & Marketing Ltd | Administrative & support | 2012 |
| Ace Sea View Ltd | Hospitality | 2025 |
| Acerster Limited | Wholesale & retail | 2025 |
| ACG Care Ltd | Administrative & support | 2015 |
| Achieving Happiness Ltd | Hospitality | 2021 |
| ACL Properties Limited | Real estate | 2000 |
| ACM Meat Factory Ltd | Manufacturing | 2017 |
| Acmacmacm Limited | Professional & scientific | 2025 |
| Acmed Services Ltd | Health & social care | 2014 |
| Acorn Assist Limited | Wholesale & retail | 2016 |
| Acorn Electric & Plumbing Ltd | Construction | 2026 |
| Acorn Loft & Extension Limited | Construction | 2025 |
| Acost Formwork Ltd | Construction | 2026 |
| ACS Trustees Limited | Administrative & support | 2024 |
| Active Plus London Limited | Wholesale & retail | 2017 |
| Acumen Group Property Limited | Real estate | 2024 |
| ADA & Kramer Limited | Professional & scientific | 2020 |
| Adade Ltd | Health & social care | 2025 |
| Adam Building Solutions Ltd | Construction | 2021 |
| Adam Financial Accountants Ltd | Professional & scientific | 2024 |
| Adam Law Chambers Ltd | Professional & scientific | 2026 |
| Adam Trading Limited | Wholesale & retail | 2021 |
| Adam&Eve Estate Limited | Households | 2025 |
| Adams Perfumes Limited | Wholesale & retail | 2023 |
| Adamy Cosmetics Ltd | Manufacturing | 2018 |
| Adam’S Curry and Kebab House Ltd | Transport & logistics | 2024 |
| Adaobiartistry Limited | Other services | 2024 |
| Addington Hathaway Ltd | Hospitality | 2025 |
| ADE Hair and Beauty Limited | Other services | 2023 |
| Adebayo Ltd | Extraterritorial | 2021 |
| Adebis Ventures UK Limited | Transport & logistics | 2004 |
| Adequate Safety Training Ltd | Education | 2025 |
| Adeshie Gate Kids Limited | Education | 2010 |
| Adesmo UK Limited | Construction | 2018 |
| Adex Enterprises Limited | Health & social care | 2013 |
| Adeybell Limited | Health & social care | 2021 |
| Adiann Limited | Wholesale & retail | 2026 |
| Adid Ltd | Transport & logistics | 2026 |
| Adis Services Limited | Transport & logistics | 2024 |
| Aditi Advisory LLP | | 2019 |
| Aditi Trustees Limited | Professional & scientific | 2023 |
| Admire Leaves Ltd | Wholesale & retail | 2025 |
| Adoma Company Limited | Construction | 2024 |
| Ador Health-Care Services Ltd | Health & social care | 2022 |
| Ador Homes Ltd | Real estate | 2026 |
| Ador Resourcing Ltd | Administrative & support | 2018 |
| Adorn by Ayat Ltd | Wholesale & retail | 2023 |
| Adoti Ltd | Financial services | 2005 |
| Adrian Cleaning Service Ltd | Administrative & support | 2025 |
| ADS Components Limited | Construction | 2002 |
| Adsecurus Limited | Information & communication | 2013 |
| Adtaro Foods Limited | Hospitality | 2026 |
| Advance Security Solutions Ltd | Information & communication | 2022 |
| Adventus Windows Ltd | Construction | 2022 |
| AE Investment Properties Limited | Real estate | 2026 |
| AE Software Ltd | Wholesale & retail | 2021 |
| AE Wealth Management Ltd | Financial services | 2020 |
| AEM Partners Services Ltd | Real estate | 2025 |
| Aemek Solutions Limited | Mining & quarrying | 2021 |
| Aeon Hub Consultancy Limited | Hospitality | 2025 |
| Aero Tickets UK Ltd | Transport & logistics | 2024 |
| Aespheric Ltd | Information & communication | 2024 |
| Aesthetics MED Lounge Ltd | Health & social care | 2025 |
| AFA Business Services Ltd | Administrative & support | 2014 |
| Afcar Properties Ltd | Real estate | 2020 |
| Afficy Limited | Wholesale & retail | 2024 |
| Affordable Solutions in Renovation Ltd | Construction | 2023 |
| AFI Kitchenware Limited | Wholesale & retail | 2014 |
| AFI Travel UK Ltd | Administrative & support | 2019 |
| Afky Limited | Administrative & support | 2016 |
| AFM Law & Accountants Ltd | Professional & scientific | 2025 |
| Afonsoa Limited | Other services | 2020 |
| Afran Services Ltd. | Wholesale & retail | 2023 |
| Afrazian Ltd | Wholesale & retail | 2026 |
| Afreen.Haider Ltd | Manufacturing | 2025 |
| Africa House London Ltd | Other services | 2013 |
| African Equality Foundation Limited | Health & social care | 2019 |
| African Heritage Gallery Ltd | Wholesale & retail | 2013 |
| Afrikan Dishes and Decor Ltd | Construction | 2022 |
| Afrimix Limited | Hospitality | 2018 |
| Afro Caribbean Cash and Carry Limited | Wholesale & retail | 2026 |
| Afro Delight Cuisine Limited | Hospitality | 2026 |
| Afro Music London Ltd | Information & communication | 2023 |
| Afrolush Ltd | Wholesale & retail | 2022 |