| A&M Luxury Limited | Wholesale & retail | 2020 |
| A&M Protection Services Ltd | Administrative & support | 2020 |
| A&R Transport Services Ltd | Transport & logistics | 2021 |
| A&S Blessings Tech Limited | Wholesale & retail | 2022 |
| A&Sa Co Ltd | Real estate | 2025 |
| A&V Wood Investments Ltd | Real estate | 2020 |
| A&Y Auto Services Ltd | Wholesale & retail | 2022 |
| A&Z Recovery Ltd | Wholesale & retail | 2019 |
| A-1 Aviation National Services Ltd | Manufacturing | 2019 |
| A-1 Refurbishment Works Ltd | Construction | 2013 |
| A-Barr Holdings Ltd | Real estate | 2023 |
| A-Edge Systems Limited | Information & communication | 2012 |
| A-Manz Properties Ltd | Real estate | 2021 |
| A-Smart Process Ltd | Construction | 2022 |
| A-Team Property Solutions Ltd | Real estate | 2026 |
| A-Z Prop Co Ltd | Real estate | 2024 |
| A. Danial Group Ltd | Wholesale & retail | 2026 |
| A.A. & Sons Limited | Wholesale & retail | 1973 |
| A.C Property Services Ltd | Households | 2024 |
| A.C.P. Chemicals Limited | Wholesale & retail | 1983 |
| A.I. Events Limited | Administrative & support | 2024 |
| A.K Decorations & Events Ltd | Professional & scientific | 2023 |
| A.L.E. (Plymouth) Limited | Other services | 2003 |
| A.M.R Foodz Ltd | Hospitality | 2025 |
| A.N Financial Services Ltd | Financial services | 2021 |
| A.P. Educational Providers Ltd | Education | 2025 |
| A.R.G Location Services Limited | Administrative & support | 2023 |
| A.S Management & Consultancy Ltd | Professional & scientific | 2021 |
| A.S.K. Innovations Ltd | Wholesale & retail | 2024 |
| A.Sheikh Consulting Ltd | Health & social care | 2025 |
| A.T.K Build Ltd | Construction | 2021 |
| A.W Beauty Ltd | Extraterritorial | 2022 |
| A.W.Z West Ltd | Hospitality | 2023 |
| A1 Autos Slough Ltd | Wholesale & retail | 2025 |
| A1 Capital Estates Ltd | Real estate | 2026 |
| A1 Caring Bees Ltd | Health & social care | 2023 |
| A1 Database Ltd | Information & communication | 2022 |
| A1 Drinks & Wine Ltd | Wholesale & retail | 2020 |
| A1 Food & Wine (Slough) Limited | Wholesale & retail | 2011 |
| A1 Group of Companies UK Ltd | Construction | 2019 |
| A1 Immigration Services Limited | Other services | 2021 |
| A1 Mailbox Ltd | Manufacturing | 2020 |
| A1 Motorglass Ltd | Wholesale & retail | 2022 |
| A1 Plumbers UK Ltd | Construction | 2015 |
| A1 Rentals and Property Limited | Real estate | 2025 |
| A1 Road Haulage Limited | Transport & logistics | 2025 |
| A1 Roofing London Ltd | Construction | 2019 |
| A1 Solution D.B.I Ltd. | Construction | 2017 |
| A1 Sushi Limited | Hospitality | 2023 |
| A1 Windows Berkshire Limited | Construction | 2024 |
| A10 Langdon House Management Company Limited | Real estate | 2008 |
| A1FUSION Ltd | Construction | 2024 |
| A2B Consultancy Services Limited | Professional & scientific | 2015 |
| A2G Fintech Limited | Information & communication | 2016 |
| A2G Homescape Limited | Real estate | 2025 |
| A2GS London Limited | Real estate | 2021 |
| A2ITREND Ltd | Wholesale & retail | 2016 |
| A2N Investments Ltd | Real estate | 2024 |
| A2NZ UK Ltd | Real estate | 2024 |
| A2S London Ltd | Wholesale & retail | 2025 |
| A2S-COLLCOM Limited | Information & communication | 2022 |
| A2W Ltd | Wholesale & retail | 2024 |
| A2Z Autoworks Ltd | Wholesale & retail | 2023 |
| A2Z Autozone Ltd | Wholesale & retail | 2024 |
| A2Z Construction Services Ltd | Construction | 2019 |
| A2Z Constructions London Ltd | Construction | 2022 |
| A2Z Courier Services Limited | Transport & logistics | 2019 |
| A2Z Dhillon Invest Ltd | Real estate | 2024 |
| A2Z Dispatch Limited | Transport & logistics | 2023 |
| A2Z Global Trade Ltd | Wholesale & retail | 2026 |
| A2Z UK Property Developers Ltd | Real estate | 2025 |
| A3 Building Services Ltd | Construction | 2024 |
| A3 Estate Ltd | Real estate | 2025 |
| A3 Wireless Services Ltd | Information & communication | 2014 |
| A3TC Limited | Real estate | 2015 |
| A4 Couriers Ltd | Transport & logistics | 2020 |
| A4 Motor Tyres Ltd | Wholesale & retail | 2017 |
| A4V Limited | Health & social care | 2019 |
| A6 Recruitment Ltd | Administrative & support | 2025 |
| A6 West Investments Ltd | Real estate | 2024 |
| A8G Ltd | Arts & recreation | 2023 |
| AA Builders N Developers Ltd | Construction | 2025 |
| AA CAB Ltd | Transport & logistics | 2023 |
| AA Carz Ltd | Wholesale & retail | 2017 |
| AA ENG Platform Ltd | Professional & scientific | 2025 |
| AA Global Commerce Limited | Wholesale & retail | 2026 |
| AA Home Care Services Ltd | Health & social care | 2023 |
| AA Internet Ltd | Information & communication | 2019 |
| AA Kumar Ltd | Real estate | 2023 |
| AA Meadfield Ltd | Households | 2024 |
| AA Media Motions Ltd | Information & communication | 2018 |
| AA MOT & Service Centre Limited | Wholesale & retail | 2021 |
| AA Movers Ltd | Transport & logistics | 2026 |
| AA Prestige Cars Ltd | Wholesale & retail | 2019 |
| AA Prime Ventures Ltd | Real estate | 2025 |
| AA Property Group Limited | Real estate | 2017 |
| AA QP and Compliance Services Ltd | Professional & scientific | 2018 |
| AA Rubbish Removal Ltd | Water & waste | 2026 |
| AA Servicing Ltd | Other services | 2024 |
| AA Supply Ltd | Wholesale & retail | 2024 |