| African Home Limited | Manufacturing | 2020 |
| African Kitchen Ltd | Wholesale & retail | 2024 |
| African Taste Limited | Hospitality | 2026 |
| African Youth Development Association | Administrative & support | 2007 |
| Africa’S Delicacy Resort Limited | Hospitality | 2019 |
| Africom Global Limited | Real estate | 2011 |
| Afridi HD Ltd | Hospitality | 2023 |
| Afrik Fulham Ltd | Hospitality | 2019 |
| Afrik N Ltd | Administrative & support | 2018 |
| Afrimind Therapy & Training Ltd | Health & social care | 2025 |
| Afrix Freight Logistics and Holding Limited | Mining & quarrying | 2022 |
| Afro Diva Ltd | Other services | 2026 |
| Afro Food Centre Limited | Wholesale & retail | 2025 |
| Afroeuro Capital UK Ltd | Financial services | 2020 |
| Afroeuro Consult UK Limited | Professional & scientific | 2020 |
| Afrokulture LDN Ltd | Administrative & support | 2026 |
| Afromoya Ltd | Wholesale & retail | 2020 |
| AFROSON1C X Ltd | Administrative & support | 2025 |
| AFS Global Training Ltd | Education | 2022 |
| After Fajr Ltd | Wholesale & retail | 2025 |
| AG Carpentry Services Ltd | Construction | 2021 |
| AG Carpet & Flooring Limited | Construction | 2014 |
| AG Info Services Ltd | Education | 2021 |
| AG Metals Ltd | Wholesale & retail | 2025 |
| AG Sarpong Limited | Public administration | 2022 |
| Ag&L Electrical Ltd | Construction | 2015 |
| Agape Property & Refurbishment Ltd | Construction | 2024 |
| Agarak Ltd | Hospitality | 2025 |
| Agata KOW Ltd | Wholesale & retail | 2023 |
| Agathe Soul Alignment Ltd | Health & social care | 2025 |
| AGB Intl Limited | Information & communication | 2022 |
| Agbc Limited | Professional & scientific | 2010 |
| Agbude Property Ltd | Real estate | 2026 |
| Agden Hall Farm Management Company Limited | Households | 2004 |
| Agencpro Ltd | Information & communication | 2024 |
| Agent of Change Ltd | Professional & scientific | 2022 |
| Agent's Army Holdings Ltd | Administrative & support | 2022 |
| Agent's Army Ltd | Administrative & support | 2010 |
| Agentomation Ltd | Professional & scientific | 2026 |
| AGER2 Limited | Construction | 2016 |
| AGER2 Property Limited | Real estate | 2023 |
| Agham Carpentry Ltd | Construction | 2025 |
| Aghnika Limited | Wholesale & retail | 2015 |
| Agile IP LLP | | 2008 |
| Agile Workplace Solutions Ltd | Professional & scientific | 2019 |
| Agilee IO Limited | Information & communication | 2014 |
| AGM Hollings (UK) Ltd | Administrative & support | 2016 |
| AGO Consultancy & Accounting Services Ltd | Professional & scientific | 2014 |
| Agoralive Ltd | Wholesale & retail | 2025 |
| Agrenes UK Limited | Wholesale & retail | 2025 |
| Agricom UK Limited | Wholesale & retail | 2010 |
| Agyekum Ventures Co Limited | Construction | 2016 |
| Agyemang Cosmetics Limited | Wholesale & retail | 2024 |
| AH 102 OA Limited | Real estate | 2024 |
| AH Actuarial Limited | Professional & scientific | 2023 |
| AH Capital Investments Limited | Real estate | 2025 |
| AH Group Capital Limited | Financial services | 2025 |
| AH Group Holdings (Maea) Limited | Financial services | 2025 |
| AH Group Holdings (Mega) Limited | Financial services | 2018 |
| AH Group Investments Limited | Administrative & support | 2023 |
| AH Transport Ltd | Transport & logistics | 2025 |
| Ahana Food Ltd | Hospitality | 2023 |
| Ahbaroi Ltd | Wholesale & retail | 2020 |
| Ahbrushcourier Ltd | Transport & logistics | 2025 |
| Aherlow Training Services Limited | Transport & logistics | 2012 |
| Ahlia Limited | Information & communication | 2020 |
| AHM Vision Care Ltd | Health & social care | 2022 |
| Ahmed Products Ltd | Wholesale & retail | 2023 |
| AHR Food & Booz Ltd | Wholesale & retail | 2025 |
| AHR Indian Cuisine Ltd | Hospitality | 2025 |
| Ahsan IT Solutions Limited | Information & communication | 2025 |
| Ahss Limited | Real estate | 2013 |
| Ahura Holdings Ltd | Real estate | 2021 |
| AI Devops Consultants Ltd | Information & communication | 2023 |
| AI Future Tech Group Limited | Wholesale & retail | 2019 |
| AI Open Labs Limited | Information & communication | 2025 |
| AI PM Services Ltd | Professional & scientific | 2026 |
| AI Property 888 Limited | Real estate | 2022 |
| AI Traffic Surveys Limited | Transport & logistics | 2024 |
| AI UK Education Limited | Information & communication | 2025 |
| AIA Property 888 Ltd | Real estate | 2025 |
| Aibusolutions Ltd | Administrative & support | 2026 |
| Aids Healthcare Foundation UK | Health & social care | 2018 |
| Aidsend Remittance Ltd | Financial services | 2025 |
| Aidvante Consulting Group Ltd | Information & communication | 2019 |
| Aidvante Digital Ltd | Information & communication | 2024 |
| Aigburth Grange Management Company Limited | Households | 2016 |
| Aiisar Ltd | Wholesale & retail | 2020 |
| AIK London Limited | Information & communication | 2016 |
| AIL Group Ltd | Wholesale & retail | 2025 |
| Ailsa House Management Company Limited | Households | 2005 |
| Aims Tuition Limited | Education | 2021 |
| Aimtah Ltd | Wholesale & retail | 2020 |
| Ainscan Limited | Construction | 2006 |
| Ainsland Court Management Limited | Households | 1993 |
| Ainsworths (London) Limited | Manufacturing | 1974 |
| AIP Design Ltd. | Professional & scientific | 2012 |
| Air Development Consultancy Ltd | Information & communication | 2026 |
| Aira Property Services Limited | Construction | 2023 |
| Airbnbluxurystays Ltd | Real estate | 2024 |