| Afghan Hujra Ltd | Hospitality | 2025 |
| Afghan Solidarity Centre in East London | Health & social care | 2025 |
| AFI Estates Ltd | Real estate | 2025 |
| Afie Ltd | Wholesale & retail | 2018 |
| Afiha Limited | Other services | 2024 |
| Afiliated Goldstone Ltd | Wholesale & retail | 2023 |
| Afishionados Ltd | Hospitality | 2018 |
| AFL TEX Sourcing Limited | Extraterritorial | 2012 |
| AFL Transit Ltd | Transport & logistics | 2014 |
| AFP Installations Ltd | Other services | 2018 |
| Afrasham Ltd | Wholesale & retail | 2022 |
| Africa Millions Lottery Ltd | Arts & recreation | 2025 |
| African Development Services Limited | Professional & scientific | 2015 |
| African Reina Ltd | Manufacturing | 2025 |
| Afridi & Sardar Ltd | Construction | 2020 |
| Afriklilo Brand Global Ltd | Manufacturing | 2025 |
| Afrimalt UK Ltd | Wholesale & retail | 2009 |
| Afrn Limited | Construction | 2025 |
| Afro Anglo OIL and GAS Block Consult and Machinery Ltd | Construction | 2019 |
| Afro Cinema Media Ltd | Administrative & support | 2026 |
| Afro Hair Boutique Limited | Extraterritorial | 2011 |
| Afro Properties Northeast Limited | Real estate | 2024 |
| AFS Ches Limited | Wholesale & retail | 2017 |
| AFS Food Limited | Wholesale & retail | 2015 |
| AFS Removals Solutions Ltd | Transport & logistics | 2026 |
| AFS Traders Ltd | Administrative & support | 2021 |
| AFS Trading Ltd | Wholesale & retail | 2024 |
| AFS Univers Limited | Other services | 2016 |
| Afsar Uddin & Co Ltd | Transport & logistics | 2021 |
| Afsha Luxe Limited | Wholesale & retail | 2024 |
| Afsuk Ltd | Wholesale & retail | 2020 |
| Aftaab Tuitions Ltd | Education | 2025 |
| Aftermist Ltd | Wholesale & retail | 2015 |
| Afters Ilford Ltd | Wholesale & retail | 2024 |
| AFU Design & Bulid Ltd | Construction | 2024 |
| Afys Trading Ltd | Wholesale & retail | 2022 |
| Afzm S.A Elahi Logistics Ltd | Professional & scientific | 2022 |
| Afzpropertygrp Ltd | Real estate | 2025 |
| AG Care Homes Ltd | Health & social care | 2024 |
| AG Consulting & Accountancy Ltd | Professional & scientific | 2024 |
| AG Estates Holdings Ltd | Real estate | 2024 |
| AG Group UK Limited | Real estate | 2008 |
| AG Joinery Contractors Ltd | Construction | 2017 |
| AG Sollutions Ltd | Construction | 2023 |
| AG Sunset Limited | Financial services | 2019 |
| Ag-Group.Co.Uk Ltd | Real estate | 2006 |
| AGA Accountants Limited | Professional & scientific | 2005 |
| AGA Accountants London Ltd | Professional & scientific | 2020 |
| AGA Properties London Ltd | Real estate | 2024 |
| Agaffar & Co Ltd | Transport & logistics | 2026 |
| Agbs Construction Ltd | Administrative & support | 2022 |
| AGD Driving Services Ltd | Other services | 2019 |
| AGE Digitale Ltd | Health & social care | 2014 |
| AGE Homes Limited | Extraterritorial | 2010 |
| AGE UK Redbridge, Barking and Havering Ltd | Health & social care | 2001 |
| Aged Chilli Limited | Wholesale & retail | 2015 |
| Agentiv Ltd | Financial services | 2023 |
| AGF International Logistics Ltd | Transport & logistics | 2022 |
| Aggaworld Investments Limited | Real estate | 2022 |
| Aghoosh Limited | Real estate | 2026 |
| Agile Consultancy and Support Services Limited | Professional & scientific | 2022 |
| Agile Infotech Ltd | Information & communication | 2011 |
| Agile Synergy Limited | Construction | 2023 |
| AGL Base Limited | Other services | 2014 |
| AGM Construction Services Limited | Construction | 2018 |
| AGM Infra Solutions Limited | Information & communication | 2022 |
| AGM Loft & Extensions Ltd | Construction | 2022 |
| AGM Utilities Ltd | Construction | 2022 |
| Agms Properties Limited | Real estate | 2003 |
| Agmt Enterprises Limited | Hospitality | 2017 |
| Agmt Ventures Limited | Real estate | 2021 |
| AGN Property Services Ltd | Real estate | 2018 |
| Agnes-Be Ltd | Professional & scientific | 2022 |
| Agrana Group One Ltd | Real estate | 2025 |
| Agrana Two Ltd | Real estate | 2025 |
| Agrawal Holdings Limited | Health & social care | 2021 |
| Agrewal Properties Ltd | Real estate | 2025 |
| AGS Doors & Shutters Ltd | Construction | 2011 |
| AGS Exim Limited | Wholesale & retail | 2024 |
| AGS London Holdings Ltd | Real estate | 2018 |
| Agsv PVT Limited | Real estate | 2014 |
| AGT Paraplanning Ltd | Information & communication | 2025 |
| AGZ Solutions Ltd | Construction | 2020 |
| Agzbr Trading Ltd | Wholesale & retail | 2024 |
| AH Business Solutions Limited | Professional & scientific | 2023 |
| AH Cars and Couriers Ltd | Transport & logistics | 2026 |
| AH FX Ltd | Financial services | 2024 |
| AH Law Ltd | Other services | 2014 |
| AH Property Investment Ltd | Real estate | 2020 |
| AH Reliant Energy Ltd | Construction | 2023 |
| AH Ritchie Consulting Ltd | Financial services | 2017 |
| AH Sharif Ltd | Transport & logistics | 2017 |
| AH Traders Ltd | Wholesale & retail | 2019 |
| AH UK Garments Ltd | Wholesale & retail | 2020 |
| Ah-S Legal Services Limited | Professional & scientific | 2021 |
| AHA Digital Consulting Ltd | Professional & scientific | 2025 |
| AHA Foods Ltd | Hospitality | 2022 |
| Ahabrands Ltd | Wholesale & retail | 2026 |
| Ahadh Halal Meat & Poultry Ltd | Wholesale & retail | 2017 |
| Aham Media Services Limited | Information & communication | 2019 |