| A 11 Home Care Ltd | Households | 2014 |
| A 2 B Cars & Recovery Limited | Wholesale & retail | 2016 |
| A 2 Z Accountancy Solutions Limited | Professional & scientific | 2019 |
| A 2 Z Building Ltd | Construction | 2016 |
| A 2 Z Estate Agent Ltd | Real estate | 2016 |
| A 2 Z Global Limited | Wholesale & retail | 2001 |
| A 2 Z Installations Systems Ltd. | Construction | 2016 |
| A 2 Z Motor Limited | Wholesale & retail | 2009 |
| A 2 Z Plumbing Ltd | Construction | 2022 |
| A 2 Z Removal Z Ltd | Transport & logistics | 2025 |
| A 2 Z RUG Limited | Wholesale & retail | 2009 |
| A 3 Associates Limited | Professional & scientific | 2006 |
| A 4 Accounting Services Ltd | Professional & scientific | 2022 |
| A @ S E-Commerce Ltd | Other services | 2025 |
| A a & EVA Limited | Wholesale & retail | 2011 |
| A a Abdulwahid Limited | Construction | 2025 |
| A a Ajmeri Limited | Wholesale & retail | 2025 |
| A a Alpay Ltd | Other services | 2024 |
| A a Appliance Service Limited | Other services | 2006 |
| A a BAH Limited | Construction | 2019 |
| A a Boilers Ltd | Wholesale & retail | 2011 |
| A a Bond & Sons Limited | | 1988 |
| A a C Carmen Ltd | Construction | 2019 |
| A a Collins Electrical Limited | Construction | 2017 |
| A a Consult Services Pro Ltd | Information & communication | 2019 |
| A a Contracting Services Ltd | Construction | 2025 |
| A a E Stream Contracting Ltd | Wholesale & retail | 2025 |
| A a Fayli Ltd | Health & social care | 2020 |
| A a Garg & Co Limited | Professional & scientific | 2025 |
| A a Gill Limited | Extraterritorial | 2011 |
| A a Group UK Holdings Limited | Construction | 2018 |
| A a Guest Rooms Ltd | Construction | 2021 |
| A a H J Developments Ltd | Other services | 2024 |
| A a Homes and Housing ( Metro Point ) Limited | Real estate | 2015 |
| A a Homes and Housing ( North West) Ltd | Real estate | 2015 |
| A a Homes and Housing (Aylesbury) Limited | Real estate | 2014 |
| A a Homes and Housing (Basildon) Limited | Real estate | 2014 |
| A a Homes and Housing (Croydon) Limited | Real estate | 2014 |
| A a Homes and Housing (Croydon) Property Limited | Real estate | 2016 |
| A a Homes and Housing (Exchange Croydon) Limited | Real estate | 2015 |
| A a Homes and Housing (Liverpool ) Limited | Construction | 2018 |
| A a Homes and Housing (Portsmouth) Limited | Construction | 2018 |
| A a Homes and Housing Basildon Property Ltd | Real estate | 2016 |
| A a Homes and Housing(Coach House) Ltd | Real estate | 2016 |
| A a Homes and Housing(Trafalgar) Ltd | Real estate | 2016 |
| A a Jamal Tax Consultants Limited | Professional & scientific | 2003 |
| A a M Construction Limited | Construction | 2017 |
| A a Mosharaf Ltd | Health & social care | 2022 |
| A a Nails & Beauty Ltd | Other services | 2023 |
| A a Properties and Real Estate Ltd | Real estate | 2025 |
| A a Property Investments LLP | | 2006 |
| A a Sytems Services Ltd | Information & communication | 2026 |
| A a Y Ltd | Real estate | 2021 |
| A A.Michaelides Limited | Hospitality | 1963 |
| A Aaran Ltd | Construction | 1997 |
| A Aayat Ltd | Hospitality | 2024 |
| A AB Torun Properties Limited | Real estate | 2026 |
| A Abdulhakim Trading Ltd | Wholesale & retail | 2025 |
| A Abid Trading Ltd | Wholesale & retail | 2025 |
| A Accountants Limited | Professional & scientific | 2018 |
| A Adkins Touring Limited | Arts & recreation | 2008 |
| A Advisors Ltd | Administrative & support | 2017 |
| A Aesthetic Clinic London Ltd | Other services | 2019 |
| A Albay Ltd | Real estate | 2025 |
| A ALI Property Capital Ltd | Financial services | 2026 |
| A Alisa Limited | Health & social care | 2017 |
| A Alleyes on US Ltd | Information & communication | 2025 |
| A Allora Mart Ltd | Wholesale & retail | 2025 |
| A Amac Care Limited | Health & social care | 2019 |
| A and a Architects LLP | | 2007 |
| A and a Plumbing Solutions Ltd | Construction | 2021 |
| A and C Capital Ltd | Financial services | 2025 |
| A and C Investment Properties Ltd | Extraterritorial | 2016 |
| A and D Benawra Holdings Limited | Financial services | 2026 |
| A and D Hendon Ltd | Hospitality | 2018 |
| A and D Investors Ltd | Real estate | 2024 |
| A and D Wholesale Ltd | Wholesale & retail | 2024 |
| A and E Corporate Member Limited | Financial services | 2014 |
| A and E Daycare Limited | Health & social care | 2024 |
| A and E Ltd | Hospitality | 2025 |
| A and G London Ltd | Administrative & support | 2019 |
| A and H Capital Ltd | Wholesale & retail | 2018 |
| A and I Brothers Ltd | Wholesale & retail | 2017 |
| A and I Lettings Ltd | Real estate | 2026 |
| A and J Comfort Home Ltd | Real estate | 2023 |
| A and J Flooring Ltd | Construction | 2021 |
| A and J Mcconnell Property Ltd | Real estate | 2024 |
| A and K Concept LLP | | 2024 |
| A and K Construction & Cargo Ltd | Construction | 2026 |
| A and K Interiors Ltd | Construction | 2013 |
| A and K Palmtrees Estates Ltd | Real estate | 2026 |
| A and M Explore Limited | Administrative & support | 2023 |
| A and M Gentleman Grooming Ltd | Other services | 2024 |
| A and M Heirs Holding Ltd | Financial services | 2025 |
| A and M Holding Group Ltd | Professional & scientific | 2026 |
| A and M Investors Ltd | Real estate | 2017 |
| A and O Real Estates Ltd | Real estate | 2026 |
| A and R Response Damp Consultancy Ltd | Construction | 2025 |
| A and S Engineering Solutions Limited | Manufacturing | 2011 |
| A and S Plumbing Services Limited | Construction | 2011 |