| Aerial Cover Roofing Limited | Construction | 2025 |
| Aerial Empire Leeds Ltd | Health & social care | 2020 |
| Aerial Solutions TV Limited | Construction | 2021 |
| Aerocrypt Ltd | Information & communication | 2020 |
| Aeroe Properties Limited | Real estate | 2015 |
| Aeroplane & Motor Aluminium Castings Limited | Professional & scientific | 1936 |
| Aeroservices Holdings Limited | Financial services | 2025 |
| Aeroservices Ltd. | Manufacturing | 2007 |
| Aerospace Investment Assets Limited | Transport & logistics | 2024 |
| Aerotail Travel and Tours Ltd | Administrative & support | 2022 |
| AES Construction & Developments Limited | Construction | 2024 |
| AES Event Build Limited | Administrative & support | 2025 |
| AES Event Logistics Limited | Administrative & support | 2025 |
| AES Mechanical Ltd | Construction | 2018 |
| Aesir Investments Ltd | Real estate | 2023 |
| Aessoa Europe Ltd | Administrative & support | 2020 |
| Aessoa UK Ltd | Wholesale & retail | 2020 |
| Aesthetic and Health Ltd | Other services | 2026 |
| Aesthetic Beauty Ltd | Other services | 2015 |
| Aesthetic Health Ltd | Health & social care | 2009 |
| Aesthetic Ocular Safety Ltd | Education | 2025 |
| Aesthetica Medical Academy Ltd | Education | 2023 |
| Aesthetica Medical Leeds Ltd | Health & social care | 2025 |
| Aesthetica Medical Ltd | Health & social care | 2016 |
| Aesthetique Health Limited | Health & social care | 2014 |
| Aestia Limited | Information & communication | 2019 |
| Aetc Limited | Manufacturing | 1996 |
| Aethra Energy Ltd | Construction | 2025 |
| AEV Collective Ltd | Wholesale & retail | 2026 |
| AEW People Development Limited | Professional & scientific | 2014 |
| AF Broadgate Limited | Professional & scientific | 2021 |
| AF IT Consulting Limited | Information & communication | 2014 |
| AF Leytonstone Limited | Arts & recreation | 2026 |
| AF Medical Consultancy Ltd | Health & social care | 2024 |
| AF PMO Services Ltd | Information & communication | 2016 |
| AF110 Properties Ltd | Real estate | 2026 |
| Afandou Ltd | Hospitality | 2026 |
| AFB Healthcare Ltd | Wholesale & retail | 2025 |
| AFC (Harehills) Ltd | Hospitality | 2024 |
| AFC Holbeck Ltd | Hospitality | 2019 |
| AFC Realisations Limited | Administrative & support | 2003 |
| Afeeyah FBM Ltd | Health & social care | 2024 |
| Afex Properties & Finance Ltd | Hospitality | 2020 |
| Affb Limited | Wholesale & retail | 2013 |
| Affinity Digital Ltd. | Information & communication | 2017 |
| Affix Scaffolding Limited | Construction | 2009 |
| Affluence Gate Company Limited | Health & social care | 2014 |
| Affordable Bathrooms Ltd | Construction | 2020 |
| Affordable Counselling Ltd | Health & social care | 2021 |
| Affordable Furnishings Ltd | Wholesale & retail | 2010 |
| Affordable Premium Cars Ltd | Wholesale & retail | 2024 |
| Affordable Warmth Solutions CIC | Other services | 2008 |
| AFG IT Ltd | Information & communication | 2026 |
| AFG Logistics Ltd | Transport & logistics | 2021 |
| AFG Pizza Limited | Hospitality | 2025 |
| AFG Prime Picks Ltd | Wholesale & retail | 2025 |
| Afic - Accounting Finance Consultancy Ltd | Financial services | 2026 |
| Afinite Investments Ltd | Financial services | 2021 |
| Afinite Limited | Information & communication | 2002 |
| Afist(Uk) Limited | Other services | 2019 |
| AFK Investment Ltd | Real estate | 2024 |
| AFL Construction Consultants Ltd | Construction | 2021 |
| Afloarei Ltd | Transport & logistics | 2024 |
| Afoo Global Ltd | Information & communication | 2024 |
| Aforce Couriers Ltd | Transport & logistics | 2024 |
| AFP Digital Limited | Manufacturing | 2008 |
| AFP Technology Limited | Information & communication | 2019 |
| Afrasian Delights Limited | Hospitality | 2024 |
| Afri Dairy Ltd | Manufacturing | 2026 |
| Africa Fashion Show Exhibition Yorkshire(Afsey) CIC | Education | 2025 |
| African Bar & Restaurant Ltd | Hospitality | 2018 |
| African Delight Afro-Carribean Ltd | Wholesale & retail | 2025 |
| African POT Leeds Ltd | Hospitality | 2025 |
| Afriwater Ltd | Water & waste | 2026 |
| Afriwinsun Holdings Ltd | Financial services | 2025 |
| Afriwinsun Ltd | Energy | 2025 |
| Afriyie Ltd | Financial services | 2017 |
| Afro GEN Ltd | Wholesale & retail | 2021 |
| Afro Rendezvous Limited | Arts & recreation | 2026 |
| Afrochops Ltd | Hospitality | 2017 |
| Afrodance Vibes Limited | Arts & recreation | 2026 |
| Afrogrocers Ltd | Wholesale & retail | 2014 |
| Afrostar Grocer Ghanaian & West African Food Market Ltd | Wholesale & retail | 2017 |
| Afroyums Ltd | Hospitality | 2025 |
| AFS (Yorkshire) Limited | Real estate | 2021 |
| AFS Design Ltd | Professional & scientific | 2021 |
| Afsa Verify Global Solution Limited | Administrative & support | 2025 |
| Afshar Properties Ltd | Hospitality | 2023 |
| Afsoo Beauty Ltd | Other services | 2024 |
| Afsoo Clinic Ltd | Other services | 2024 |
| AFT Business Solutions Limited | Professional & scientific | 2019 |
| After School Haven Ltd | Education | 2025 |
| Afters Original Bedford Ltd | Hospitality | 2016 |
| Afto Properties Limited | Real estate | 2025 |
| Afto Tech Limited | Information & communication | 2018 |
| Afton Projects Limited | Agriculture & fishing | 2008 |
| Afwam Holdings Ltd | Real estate | 2025 |
| Afyval Limited | Hospitality | 2022 |
| AG Consultancy & Representation Ltd | Other services | 2020 |
| AG ENT Specialists Ltd | Health & social care | 2025 |