| Avacoach.Com Limited | Transport & logistics | 2011 |
| Avahenel Limited | Administrative & support | 2024 |
| Avalon Doors & Awnings Limited | Construction | 2001 |
| Avalon Drops Ltd | Transport & logistics | 2026 |
| Avalon Partners Ltd | Professional & scientific | 2009 |
| Avanska Ltd | Wholesale & retail | 2025 |
| Avant Gard Media Limited | Information & communication | 2025 |
| Avant Property Limited | Hospitality | 2017 |
| Avant Restaurants Limited | Hospitality | 2015 |
| Avante Crash Repair Centre Limited | Wholesale & retail | 2020 |
| Avante Developments (UK) Limited | Construction | 2008 |
| Avanti Shaped Blinds Limited | Construction | 2014 |
| Avapond Ltd | Professional & scientific | 2020 |
| Avarda Ltd | Hospitality | 2020 |
| Avatravel (Leyland) Limited | Administrative & support | 2016 |
| Avcc Ltd | Real estate | 2025 |
| AVD Care Services Ltd | Wholesale & retail | 2026 |
| AVE Market Ltd | Wholesale & retail | 2026 |
| Avebury Consulting Limited | Professional & scientific | 2020 |
| Avencrest Foods Limited | Hospitality | 2026 |
| Avenham Care Limited | Real estate | 2021 |
| Avenham CP Services Ltd | Professional & scientific | 2024 |
| Avenham Grocery Ltd | Wholesale & retail | 2024 |
| Avenham Management Ltd | Construction | 2025 |
| Avenham Store Ltd | Wholesale & retail | 2025 |
| Avenoir Digital Limited | Professional & scientific | 2022 |
| Aventium Limited | Professional & scientific | 2025 |
| Aventy Motor Group Ltd | Wholesale & retail | 2024 |
| Avenue & Partners Ltd | Financial services | 2022 |
| Aviation Medics Limited | Health & social care | 2011 |
| Avicenna Medcare Ltd | Health & social care | 2023 |
| Avie Luthra Films Limited | Arts & recreation | 2000 |
| Avika Limited | Information & communication | 2018 |
| Avir Services Limited | Health & social care | 2024 |
| Avistec Consulting Limited | Information & communication | 2025 |
| Avitium Ltd | Arts & recreation | 2017 |
| AVJ Design Limited | Professional & scientific | 2005 |
| Avmb Investments Limited | Real estate | 2021 |
| Avorio Productions Ltd | Information & communication | 2023 |
| Avpm Limited | Real estate | 2022 |
| AVR Store Ltd | Wholesale & retail | 2025 |
| AVT Garage Limited | Wholesale & retail | 2025 |
| AW Luck Funerals Ltd | Other services | 2014 |
| AW Training and Compliance Ltd | Professional & scientific | 2018 |
| AWA and SON Decorators Limited | Construction | 2010 |
| Awaisia Hris Consulting Ltd | Information & communication | 2025 |
| Awareness Coaching and Therapy Limited | Health & social care | 2016 |
| Awareness Therapy Limited | Extraterritorial | 2024 |
| Away and R T Ltd | Wholesale & retail | 2025 |
| Awazeal Services Ltd | Transport & logistics | 2026 |
| Awen Impact Limited | Professional & scientific | 2025 |
| Awesome Finish Ltd | Construction | 2025 |
| AWF Academy Limited | Education | 2021 |
| AWK Enterprises Limited | Hospitality | 2018 |
| Awls Healthcare Ltd | Health & social care | 2013 |
| AWP Computer Services Ltd | Information & communication | 2014 |
| AWR Car Sales Limited | Wholesale & retail | 2023 |
| Awryns Ltd | Real estate | 2025 |
| AWS Pro Ltd | Wholesale & retail | 2025 |
| Axel Motors Ltd | Wholesale & retail | 2018 |
| Axel Products Ltd | Wholesale & retail | 2018 |
| Axent Limited | Construction | 2025 |
| Axess 2 Limited | Construction | 2004 |
| Axia Learning Alliance | Education | 2021 |
| Axiom Education (Rochdale) Holdings Limited | Professional & scientific | 2005 |
| Axiom Education (Rochdale) Limited | Administrative & support | 2005 |
| Axiom Living (MBR) Ltd | Real estate | 2024 |
| Axiom Living (URM) Ltd | Real estate | 2024 |
| Axiom Living Ltd | Real estate | 2024 |
| Axiom Property Partners Ltd | Administrative & support | 2022 |
| Axiona AI Ltd | Construction | 2025 |
| Axis Compliance Ltd | Professional & scientific | 2026 |
| Axis International Security Services Limited | Administrative & support | 2010 |
| Axis RE Construction Ltd | Professional & scientific | 2023 |
| Axis RE Development Management Ltd | Professional & scientific | 2023 |
| Axis RE Developments Ltd | Real estate | 2023 |
| Axis RE Limited | Professional & scientific | 2021 |
| Axispoint Holdings & Logistics Limited | Transport & logistics | 2025 |
| Axle NW Ltd | Wholesale & retail | 2026 |
| Axon Consultancy Limited | Information & communication | 1998 |
| Axto Ltd | Construction | 2026 |
| AXZ Group Ltd | Wholesale & retail | 2025 |
| AY Asset Management Limited | Real estate | 2024 |
| AY Services (NW) Limited | Professional & scientific | 2024 |
| AY Window Cleaning Ltd | Administrative & support | 2023 |
| Ayah Capital Ltd | Real estate | 2019 |
| Ayan Services Ltd | Transport & logistics | 2022 |
| Ayay Trading Ltd | Financial services | 2025 |
| Ayaz Auto's Ltd | Wholesale & retail | 2020 |
| AYB Law Holdings Ltd | Professional & scientific | 2024 |
| Ayesha International Ltd | Wholesale & retail | 2025 |
| Ayim Global Innovations Ltd | Wholesale & retail | 2025 |
| Ayla Suveren Creative Consulting Ltd | Arts & recreation | 2013 |
| AYM Preston Ltd | Hospitality | 2019 |
| Aymra Real Estate Ltd | Real estate | 2023 |
| Ayodex Capital Limited | Health & social care | 2014 |
| Ayom Debt Recovery Limited | Administrative & support | 2025 |
| Ayoub Diagnostics Ltd | Health & social care | 2025 |
| AYP Distribution Ltd | Wholesale & retail | 2024 |
| AYP Group Limited | Professional & scientific | 2017 |