| Aegleio Limited | Professional & scientific | 2015 |
| AEH Asset Holdings Limited | Financial services | 2025 |
| Aeif Managers LP | | 2005 |
| AEJ Holdings Limited | Professional & scientific | 2019 |
| Aejr Catering Ltd | Hospitality | 2018 |
| AEM Events Ltd | Arts & recreation | 2019 |
| AEM Limited | Manufacturing | 1959 |
| Aeml Limited | Wholesale & retail | 2023 |
| Aeone Systems Limited | Information & communication | 2026 |
| AEP Holdings Limited | Real estate | 2022 |
| AER Construction Ltd | Construction | 2025 |
| Aere Atelier Ltd | Manufacturing | 2025 |
| Aerial Aces Ltd | Arts & recreation | 2025 |
| Aerial Installations (Glenfield) Limited | Construction | 2003 |
| Aerial Properties Limited | Real estate | 2014 |
| Aeriselle Limited | Wholesale & retail | 2025 |
| Aero Cyber Limited | Information & communication | 2018 |
| Aero Cyber Realty Limited | Real estate | 2023 |
| Aero Dart Limited | Professional & scientific | 1977 |
| Aerofit Limited | Construction | 1999 |
| Aerolink Taxi Leicester Ltd | Transport & logistics | 2022 |
| Aeromechanical Wheels Ltd | Education | 2024 |
| Aeroseals Limited | Manufacturing | 2002 |
| Aeroseals Marine Limited | Manufacturing | 2012 |
| Aeroshoot London Ltd | Hospitality | 2025 |
| Aeroworx Emergency Medical Management Limited | Professional & scientific | 2017 |
| Aesthetic Modest Fashion Ltd | Wholesale & retail | 2026 |
| Aesthetic Smiles Healthcare Limited | Health & social care | 2019 |
| Aesthetics & Wellbeing Ltd | Health & social care | 2021 |
| Aesthetics (Leicester) Limited | Information & communication | 2006 |
| Aesthetics by AMY Limited | Wholesale & retail | 2020 |
| Aesthetics by DR K Limited | Health & social care | 2022 |
| Aeternus Ltd | Health & social care | 2010 |
| Aether Analytics Ltd | Information & communication | 2026 |
| Aether ORE Ltd | Information & communication | 2025 |
| AF Fast Food Ltd | Hospitality | 2026 |
| AFA Leicester Holdings Limited | Real estate | 2017 |
| Afaksphotos Ltd | Professional & scientific | 2025 |
| Afaq Aljouf Agricultural Equipment Trading Ltd | Wholesale & retail | 2025 |
| AFB Accountancy Ltd | Professional & scientific | 2024 |
| AFC Real Estate Ltd | Arts & recreation | 2021 |
| AFD Commercial Development Limited | Real estate | 2021 |
| AFE Global Resources Limited | Health & social care | 2025 |
| Affa Leicester Limited | Education | 2015 |
| Affdam Limited | Wholesale & retail | 2002 |
| Affect-Gi Multiactivies Limited | Administrative & support | 2023 |
| Affelios Limited | Information & communication | 2021 |
| Affinity Exports Ltd | Other services | 2018 |
| Affinity Haven Ltd | Real estate | 2024 |
| Affinity HR & Management Ltd | Professional & scientific | 2018 |
| Affinity Law Limited | Professional & scientific | 2008 |
| Affinity Law Personal Injury Limited | Professional & scientific | 2011 |
| Affitto Limited | Real estate | 2007 |
| Affitto Nuneaton Limited | Real estate | 2021 |
| Affix Healthcare Ltd | Health & social care | 2018 |
| Affix Housing CIC | Hospitality | 2023 |
| Affogato Limited | Hospitality | 2018 |
| Affordable Designz Ltd | Wholesale & retail | 2020 |
| Affordable Flames Heating and Plumbing Ltd | Construction | 2016 |
| Affordable Healthcare Ltd | Health & social care | 2012 |
| Affordable Splashbacks Ltd | Wholesale & retail | 2019 |
| Affordable Tanning Solutions Ltd | Other services | 2025 |
| Affordex Trading Limited | Wholesale & retail | 2025 |
| AFG Motors & Tyres Ltd | Wholesale & retail | 2024 |
| AFG Property Limited | Households | 2023 |
| AFH Developments Ltd | Real estate | 2021 |
| AFH Haus Ltd | Real estate | 2026 |
| AFI Properties Ltd | Real estate | 2008 |
| Afis Group Ltd | Manufacturing | 2025 |
| Aflame Fire Services Limited | Administrative & support | 2014 |
| Afora Collections Limited | Wholesale & retail | 2024 |
| Afpack Ltd | Wholesale & retail | 2025 |
| AFR Leiceter Ltd | Wholesale & retail | 2025 |
| Afribasket Ltd | Wholesale & retail | 2025 |
| African Dream Cars Ltd | Wholesale & retail | 2009 |
| African Forum for Restorative Justice CIC | Public administration | 2010 |
| African Health, Education and Development Services (Aheads) Ltd | Education | 2009 |
| African Heritage Alliance CIC | Other services | 2016 |
| African Kitchen and Bar Ltd | Hospitality | 2013 |
| African Konnection Ltd | Wholesale & retail | 2010 |
| African Network LLR CIC | Administrative & support | 2021 |
| African-British Business Association | Education | 2004 |
| Africas Finest Ltd | Wholesale & retail | 2025 |
| Afrikana Wembley Limited | Hospitality | 2024 |
| Afriq Convenience Ltd | Wholesale & retail | 2024 |
| Afro Mega Grocery Store Limited | Wholesale & retail | 2017 |
| Afrogaine Ltd | Wholesale & retail | 2020 |
| Afropalace Ltd | Wholesale & retail | 2025 |
| AFS Estates Limited | Real estate | 2022 |
| AFS Plumbing and Heating Ltd | Construction | 2024 |
| Afsa Trading (UK) Ltd | Manufacturing | 2018 |
| Afss Holdings Limited | Financial services | 2022 |
| Afss Investment Ltd | Real estate | 2015 |
| Aftab ALI Limited | Professional & scientific | 2025 |
| Afterglow by Soleil Limited | Other services | 2024 |
| Afterhours Enterprises Ltd | Information & communication | 2025 |
| Afton Lifescience Ltd | Wholesale & retail | 2021 |
| Afya Essence Ltd | Manufacturing | 2025 |
| Afzal Garments Ltd | Manufacturing | 2022 |
| AG BAL Transport Ltd | Transport & logistics | 2022 |