| Aveline Therapy Limited | Health & social care | 2025 |
| Avellio Ltd | Information & communication | 2023 |
| Aven Home Ltd | Real estate | 2022 |
| Aven Housing Limited | Real estate | 2026 |
| Aven Management Ltd | Professional & scientific | 2012 |
| Avena Properties Ltd | Hospitality | 2025 |
| Avenbell Limited | Wholesale & retail | 2009 |
| Avenbury Developments Ltd | Real estate | 2016 |
| Avenbury Estates Ltd | Real estate | 2014 |
| Avenbury Properties 2021 Limited | Construction | 2021 |
| Aveniqo Ltd | Households | 2026 |
| Avenmere Housing Ltd | Real estate | 2026 |
| Avenmere Ltd | Real estate | 2024 |
| Avenor Catering Ltd | Hospitality | 2026 |
| Avensys UK Training Limited | Education | 2015 |
| Aventa Laboratory Limited | Health & social care | 2010 |
| Aventador Housing Ltd | Real estate | 2020 |
| Aventia Care Ltd | Wholesale & retail | 2023 |
| Aventis Holdings Ltd | Wholesale & retail | 2025 |
| Aventis Property Ltd | Real estate | 2025 |
| Aventon Ltd | Real estate | 2024 |
| Aventurine Legal Ltd | Professional & scientific | 2026 |
| Aventus Care Homes Ltd | Health & social care | 2019 |
| Aventus Care Solutions Limited | Health & social care | 2023 |
| Aventus Chauffeurs Ltd | Transport & logistics | 2017 |
| Aventus Dental Limited | Health & social care | 2022 |
| Aventus Engineering Ltd | Administrative & support | 2023 |
| Aventus Group Ltd | Manufacturing | 2000 |
| Aventus Holdings Limited | Real estate | 2023 |
| Aventus Investment Limited | Financial services | 2022 |
| Aventus Weddings Ltd | Information & communication | 2022 |
| Aventus White Music Ltd | Administrative & support | 2022 |
| Avenue Furniture Ltd | Manufacturing | 2011 |
| Avenue Salon Services Ltd | Wholesale & retail | 2020 |
| Avenue TEX Limited | Wholesale & retail | 2020 |
| Avenues Fried Chicken Ltd | Hospitality | 2024 |
| Average Joe's Barbers Limited | Other services | 2017 |
| Averion Holdings Limited | Real estate | 2021 |
| Avero Engineering Consulting Ltd | Professional & scientific | 2025 |
| Averon Logistics Ltd | Transport & logistics | 2026 |
| Averon Market Ltd | Wholesale & retail | 2026 |
| Avery & S Company Limited | Real estate | 2020 |
| Avery Fields Community Foundation | Arts & recreation | 2016 |
| Avery Fields Sports & Events Limited | Arts & recreation | 2018 |
| Avery Hill Residents Management Company Limited | Households | 2016 |
| Avery Medical Ltd | Health & social care | 2025 |
| Avery Plumbing and Heating Limited | Construction | 2015 |
| Avery Residential London Ltd | Real estate | 2011 |
| Avestrum Ltd | Wholesale & retail | 2025 |
| Avexia Recruitment Ltd | Administrative & support | 2026 |
| Avexiabiotec Limited | Agriculture & fishing | 2019 |
| Avexio Services Ltd | Administrative & support | 2026 |
| Avfc 1874 Ltd | Real estate | 2026 |
| Avforums Ltd | Wholesale & retail | 2007 |
| Avhe Holdings Ltd | Financial services | 2023 |
| AVI Car Care Limited | Wholesale & retail | 2025 |
| AVI Courier Express Limited | Transport & logistics | 2024 |
| AVI MAX Building Ltd | Construction | 2019 |
| Aviaathan Ltd | Wholesale & retail | 2024 |
| Avian World Ltd | Professional & scientific | 2024 |
| Aviana Properties Ltd | Real estate | 2026 |
| Aviao Aviation Training Consultancy Ltd | Professional & scientific | 2022 |
| Aviator Capital Ltd | Financial services | 2017 |
| Avicenna Consulting Limited | Professional & scientific | 2006 |
| Avicenna Pharmaceutics Limited | Health & social care | 2019 |
| Avics MED Catering & Freight UK Ltd | Transport & logistics | 2018 |
| Avid Panda Limited | Information & communication | 2018 |
| Avid Panda Media Limited | Information & communication | 2017 |
| Avida Ltd | Hospitality | 2019 |
| Avie Care Limited | Public administration | 2022 |
| Avighna Software and Consultancy Services Ltd. | Information & communication | 2014 |
| Avijot Building Services Ltd | Construction | 2021 |
| Avinair Limited | Health & social care | 2007 |
| Avings Engineering Limited | Manufacturing | 2025 |
| Avinproperties Limited | Construction | 2024 |
| Avion Biolabs Ltd | Wholesale & retail | 2026 |
| Avior Trading Ltd | Wholesale & retail | 2019 |
| Aviro Holdings Ltd | Hospitality | 2026 |
| Avis Healthcare Limited | Health & social care | 2014 |
| Avis Media Ltd | Information & communication | 2024 |
| Avisaar Limited | Real estate | 2022 |
| Avishan Ltd | Wholesale & retail | 2022 |
| Avision for Empowerment CIC | Education | 2012 |
| Avison Young Holdings Limited | Administrative & support | 2014 |
| Avison Young Infrastructure Management Limited | Financial services | 2000 |
| Avison Young Project Management Limited | Real estate | 1992 |
| Avison Young Real Estate Finance Limited | Professional & scientific | 2010 |
| Avison Young Workplace Limited | Real estate | 1999 |
| Avix Healthcare Recruitment Ltd | Administrative & support | 2021 |
| Avjit Tech Limited | Information & communication | 2011 |
| Avkanya Ltd | Real estate | 2022 |
| AVN Holding Ltd | Financial services | 2020 |
| AVN Investment Ltd | Real estate | 2018 |
| AVN Trade Ltd | Real estate | 2021 |
| AVNIS7 Ltd | Wholesale & retail | 2026 |
| Avobear Creative Ltd | Professional & scientific | 2025 |
| Avocon Ltd Ltd | Manufacturing | 2023 |
| Avodah Computer Solutions Ltd | Information & communication | 2025 |
| Avon Accident Bodyshop Ltd | Wholesale & retail | 2026 |
| Avon and South Wales Health Limited | Health & social care | 2004 |