| Almaal Convenience Store Ltd | Wholesale & retail | 2024 |
| Almnla Diagnostics & Coaching Ltd | Health & social care | 2026 |
| Almond Villas Limited | Health & social care | 2010 |
| Alnoor Healthcare Ltd | Health & social care | 2024 |
| Alpas Finance Ltd | Financial services | 2023 |
| Alpha Market Research Limited | Professional & scientific | 2008 |
| Alpha Properties MCR Ltd | Real estate | 2023 |
| Alpine Management Limited | Households | 2021 |
| Alsaa Homes PVT Ltd | Real estate | 2020 |
| Altaf Logistics Limited | Transport & logistics | 2019 |
| Altrincham Car Sales Limited | Wholesale & retail | 2024 |
| Altruverse Ltd | Information & communication | 2019 |
| Altus Construction Managment Ltd | Professional & scientific | 2023 |
| Altus Design and Build Ltd | Construction | 2026 |
| Aluminium Gutters Direct Limited | Wholesale & retail | 2025 |
| Alvion Services Ltd | Other services | 2025 |
| Alzain Contractors Ltd | Construction | 2023 |
| AM & AP Holdings Limited | Real estate | 2024 |
| AM Accounting and Consulting Limited | Professional & scientific | 2026 |
| AM Farma Ltd | Wholesale & retail | 2023 |
| AM Fire Ltd | Real estate | 2021 |
| AM Healthcare Services Ltd | Health & social care | 2016 |
| AM Medico Limited | Health & social care | 2019 |
| AM Physique Ltd | Arts & recreation | 2020 |
| Amaco Supply Solutions UK Limited | Professional & scientific | 2009 |
| Amanda Bartley Ltd | Education | 2019 |
| Amax MCR Limited | Wholesale & retail | 2024 |
| Ambar Exploration Ltd | Professional & scientific | 2019 |
| Ambassador Tapes Limited | Wholesale & retail | 1982 |
| Amber Sales Management Ltd | Professional & scientific | 2011 |
| Ambidex Limited | Health & social care | 2014 |
| AME Property Group Limited | Real estate | 2025 |
| Amea Consulting Ltd | Professional & scientific | 2025 |
| Amen Corner Ltd | Real estate | 2020 |
| Amensah Ltd | Wholesale & retail | 2024 |
| Amera Pharma Services Limited | Wholesale & retail | 2025 |
| American Sweetland Ltd | Wholesale & retail | 2023 |
| American Techno Controls Ltd | Manufacturing | 2022 |
| Amersham Property Limited | Hospitality | 2008 |
| AMG Financial Solutions Limited | Financial services | 2004 |
| AMG Wills Limited | Professional & scientific | 2013 |
| Amica Trading Limited | Real estate | 2022 |
| Amin Traders (MCR) Limited | Real estate | 2016 |
| AMK Property Services Ltd | Construction | 2025 |
| AML Reporting Limited | Health & social care | 2015 |
| Amlaak Investments Ltd | Real estate | 2023 |
| Amnah KH08HAR Ltd | Administrative & support | 2011 |
| Amni Services LLP | | 2016 |
| Amor Capital Partners Ltd | Real estate | 2023 |
| Ampersand Global Services Ltd | Other services | 2024 |
| Ampigio Limited | Hospitality | 2026 |
| Amplisynth Ltd | Professional & scientific | 2024 |
| AMS Cost Services Limited | Professional & scientific | 2023 |
| AMS Medacs Ltd | Health & social care | 2024 |
| AMS Medical Reporting Limited | Professional & scientific | 2015 |
| Amtrad Consulting Limited | Professional & scientific | 2019 |
| Amujan Ltd | Wholesale & retail | 2023 |
| AN Ideal World Communications Limited | Professional & scientific | 2009 |
| ANC (Staffs) Ltd | Agriculture & fishing | 2011 |
| Anca Maria Gaman Ltd | Wholesale & retail | 2022 |
| Ancote Limited | Real estate | 2013 |
| Andare Consulting Ltd | Financial services | 2021 |
| Andell Limited | Hospitality | 2013 |
| Andi 05 Ltd | Transport & logistics | 2019 |
| Andrea Nani Limited | Hospitality | 2024 |
| Andrew Lever Goldsmith Limited | Manufacturing | 2009 |
| Andy Carroll Tiling Ltd | Construction | 2023 |
| Andy Green PR Ltd | Professional & scientific | 2018 |
| ANF Medical Ltd | Health & social care | 2022 |
| Angel Beauty by Angela Limited | Other services | 2026 |
| Angel Home Care Service Private Limited | Health & social care | 2012 |
| Angel Property Finance Limited | Financial services | 2021 |
| Angel Skin LAB Limited | Other services | 2025 |
| Angel-X Limited | Arts & recreation | 2026 |
| Angela Lewis Ltd | Other services | 2023 |
| Anglo American Pursuit Cars Limited | Arts & recreation | 2020 |
| Anika Properties Limited | Real estate | 2016 |
| Aniqa Hussain Limited | Wholesale & retail | 2023 |
| ANN Balon Ltd | Wholesale & retail | 2002 |
| ANS Surface Repairs Limited | Manufacturing | 2022 |
| Ansa Hussain Ltd | Wholesale & retail | 2022 |
| Ansenproperty Ltd | Real estate | 2022 |
| Answ Limited | Health & social care | 2023 |
| Antique Conservation Ltd | Other services | 2017 |
| Anwar Solution Services Limited | Information & communication | 2014 |
| Anzami Limited | Wholesale & retail | 2017 |
| Anzen Property Limited | Real estate | 2021 |
| AP Products Ltd | Administrative & support | 2010 |
| APA FX Trading Limited | Administrative & support | 2025 |
| Apericus Ltd | Professional & scientific | 2020 |
| Apexlawns Ltd | Other services | 2025 |
| APF Holdco Limited | Financial services | 2023 |
| APF Mezz Limited | Financial services | 2025 |
| APF Renovations Limited | Financial services | 2026 |
| APF SPV 1 Limited | Financial services | 2025 |
| APF Topco Limited | Financial services | 2025 |
| APG 001 Freehold Limited | Real estate | 2019 |
| APG 002 Freehold Limited | Real estate | 2021 |
| APG 002 Limited | Real estate | 2019 |
| APG 003 Freehold Limited | Real estate | 2021 |