| Afro Cuban Pati Limited | Other services | 2011 |
| Afro Freight (UK) Ltd | Transport & logistics | 2014 |
| Afro Lanka Ltd | Wholesale & retail | 2014 |
| Afro-Asia Limited | Wholesale & retail | 2020 |
| Afromodel UK Clothing Limited | Wholesale & retail | 2021 |
| Aftco Ltd | Wholesale & retail | 2025 |
| Aftertaste Limited | Hospitality | 2026 |
| Afya Homes Limited | Real estate | 2023 |
| Afyatech Ltd | Information & communication | 2018 |
| AG & AS Property Ltd | Real estate | 2022 |
| AG 87 Ltd | Construction | 2023 |
| AG Absolute Growth Ltd | Wholesale & retail | 2026 |
| AG Bourbon Ltd | Health & social care | 2022 |
| AG Hatton Ltd | Wholesale & retail | 2022 |
| AG7 Limited | Construction | 2019 |
| AGA Accountancy Limited | Professional & scientific | 2014 |
| AGA Asset Management Ltd | Financial services | 2020 |
| AGA Dziedzic Ltd | Wholesale & retail | 2020 |
| AGA Fire Construction Ltd | Construction | 2023 |
| AGA Holdings Ltd | Financial services | 2020 |
| AGA Property Management Ltd | Real estate | 2020 |
| Agal Bagal Ltd | Real estate | 2018 |
| Agalma Fine Art Ltd | Arts & recreation | 2013 |
| Aganitha Space Technologies Limited | Transport & logistics | 2025 |
| Agarwal Brothers Limited | Real estate | 2015 |
| Agate Glass Limited | Administrative & support | 1979 |
| AGC Construction Limited | Construction | 2025 |
| AGD Design & Build Ltd | Construction | 2026 |
| AGD Geoconsulting Limited | Professional & scientific | 2025 |
| Aggarwal Estates Limited | Real estate | 2025 |
| Agha Property Developments Ltd | Construction | 2022 |
| Agie Investments Ltd | Construction | 2019 |
| Agie Sagie Ltd | Manufacturing | 2019 |
| Agile HB Limited | Information & communication | 2015 |
| Agile Productions Ltd | Arts & recreation | 2023 |
| Agile World Associates Limited | Extraterritorial | 2016 |
| Agilebiz Ltd | Wholesale & retail | 2020 |
| Agilets UK Limited | Information & communication | 2014 |
| Agincourt Residents Society Limited | Households | 1982 |
| AGK Property Holddings Limited | Construction | 2019 |
| AGL Airsoft (Aldgate) Limited | Arts & recreation | 2023 |
| AGL Airsoft Ltd | Wholesale & retail | 2017 |
| AGL Drylining Ltd | Construction | 2018 |
| Aglc Consulting Ltd | Professional & scientific | 2019 |
| Aglon Limited | Real estate | 2023 |
| AGM Business Solutions Ltd | Professional & scientific | 2011 |
| Agnes & Aubrey Ltd | Information & communication | 2018 |
| Agnes House Ltd | Real estate | 2026 |
| Agnes.Domclean Limited | Administrative & support | 2006 |
| Agora Coworking Limited | Arts & recreation | 2017 |
| Agora Trading Company Limited | Wholesale & retail | 2020 |
| AGP Big Ltd | Construction | 2017 |
| AGP Construction Services Ltd | Construction | 2018 |
| AGP Harrow Ltd | Real estate | 2025 |
| AGR Certification Limited | Administrative & support | 2003 |
| AGR World Ltd | Manufacturing | 2023 |
| Agrah Restaurant Limited | Hospitality | 1994 |
| Agrasen Limited | Information & communication | 2013 |
| Agrassen and Co Limited | Information & communication | 2023 |
| AGS & Accountancy Ltd | Professional & scientific | 2022 |
| AGS Accountancy Ltd | Professional & scientific | 2019 |
| AGS Financial Services Ltd | Professional & scientific | 2025 |
| AGS Mortgages & Financial Services Ltd | Financial services | 2024 |
| Agua Carpentry Experts Ltd | Construction | 2017 |
| Agua Holding Ltd | Financial services | 2026 |
| Agua Properties Limited | Real estate | 2024 |
| Agua Wood Ltd | Wholesale & retail | 2023 |
| Aguaheat Limited | Construction | 2006 |
| AH & AB Medical Services Ltd | Health & social care | 2019 |
| AH ARK Limited | Hospitality | 2025 |
| AH F1 Limited | Real estate | 2025 |
| AH F2 Limited | Real estate | 2025 |
| AH F3 Limited | Real estate | 2025 |
| AH F4 Limited | Real estate | 2025 |
| AH F5 Limited | Real estate | 2025 |
| AH F6 Limited | Real estate | 2025 |
| AH F7 Limited | Real estate | 2025 |
| AH F8 Limited | Real estate | 2025 |
| AH Home Care Limited | Health & social care | 2023 |
| AH Selection Ltd | Administrative & support | 2014 |
| Ahana Systems and Solutions Limited | Information & communication | 2022 |
| AHC Consultancy Ltd | Health & social care | 2019 |
| AHC PVT Ltd | Professional & scientific | 2025 |
| Ahdk Enterprise Ltd | Wholesale & retail | 2019 |
| Ahimsa Homes Ltd | Health & social care | 2023 |
| Ahir Organic Limited | Wholesale & retail | 2024 |
| AHM Tech Ltd | Information & communication | 2012 |
| Ahmad Construction Associates UK Ltd | Construction | 2025 |
| Ahmed Medical Limited | Health & social care | 2014 |
| Ahmed Optics Ltd | Wholesale & retail | 2023 |
| Ahmsl Ltd | Health & social care | 2023 |
| AHN Partners Ltd | Professional & scientific | 2023 |
| AHR Ventures Limited | Professional & scientific | 2023 |
| AHS Investments (K) Ltd | Administrative & support | 2024 |
| AHS Medics Ltd | Health & social care | 2019 |
| Ahsan Traders UK Ltd | Wholesale & retail | 2025 |
| Ahsr Limited | Real estate | 2015 |
| Ahuja Investments Limited | Construction | 2016 |
| AI 2 Bedside Ltd | Health & social care | 2024 |
| AI Assisted Microeconomic Ltd | Information & communication | 2025 |