| AU 01 Limited | Financial services | 2014 |
| AU Cars Ltd | Wholesale & retail | 2023 |
| AU Diamond Limited | Health & social care | 2022 |
| AU Gold Limited | Real estate | 2022 |
| AU Property Services Ltd | Real estate | 2020 |
| AU PVT Ltd | Wholesale & retail | 2026 |
| AU Smile Care Ltd | Health & social care | 2026 |
| AU7 Resources Limited | Wholesale & retail | 2026 |
| AUA Trade Ltd | Wholesale & retail | 2021 |
| AUB Transport Limited | Transport & logistics | 2018 |
| Aubourn Mcintyre Ltd | Other services | 2026 |
| Audax Vita Ltd | Administrative & support | 2018 |
| Audio Solutions (North West) Limited | Other services | 2004 |
| Audley Investments (2025) Ltd | Real estate | 2025 |
| AUI Investments Ltd | Real estate | 2016 |
| Auima Ltd | Real estate | 2021 |
| Aulton Electrical Limited | Construction | 2017 |
| AUM Shiva UK Ltd | Real estate | 2019 |
| Aupduk Limited | Other services | 2019 |
| Aura and Co International Limited | Professional & scientific | 2019 |
| Aura Hair & Beauty Limited | Other services | 2024 |
| Aura Legal Limited | Professional & scientific | 2024 |
| Aura Property Development NW Limited | Real estate | 2025 |
| Aura Spa and Beauty Therapy Limited | Other services | 2014 |
| Aurahaus Luxe Ltd | Manufacturing | 2025 |
| Auravita Ltd | Manufacturing | 2026 |
| Aurexonconsulting Ltd | Professional & scientific | 2025 |
| Auriora Ltd | Wholesale & retail | 2025 |
| Aurix Capital Ltd | Financial services | 2025 |
| Aurora Jewel Ltd | Wholesale & retail | 2026 |
| Aurora Victus Ltd | Manufacturing | 2014 |
| Auroragold Ventures Ltd | Wholesale & retail | 2025 |
| Ausiah Limited | Information & communication | 2019 |
| Ausom Limited | Wholesale & retail | 2025 |
| Aussie Crunchups Ltd | Manufacturing | 2025 |
| Austin Window Cleaning Limited | Administrative & support | 2013 |
| Autarky Ltd | Construction | 2022 |
| Autem Limited | Construction | 1986 |
| Authentic Cuisine Catering Limited | Hospitality | 2017 |
| Authentic Fox-Project Management Limited | Professional & scientific | 2025 |
| Auto 3 Services Limited | Wholesale & retail | 2009 |
| Auto Assist (NW) Limited | Wholesale & retail | 2013 |
| Auto Bargain Limited | Wholesale & retail | 2025 |
| Auto Care Centre NW Limited | Wholesale & retail | 2025 |
| Auto Clutch Centre Limited | Wholesale & retail | 2019 |
| Auto Deliver Limited | Transport & logistics | 2020 |
| Auto Door Tech Ltd | Manufacturing | 2025 |
| Auto Mechanics Group Ltd | Wholesale & retail | 2024 |
| Auto Omed Limited | Wholesale & retail | 2015 |
| Auto Parts 123 Ltd | Wholesale & retail | 2026 |
| Auto Rental Car Hire Ltd | Administrative & support | 2007 |
| Auto Repair Link Ltd | Information & communication | 2026 |
| Auto Results Agency Limited | Professional & scientific | 2025 |
| Auto Scent Limited | Real estate | 1996 |
| Auto Shexa Limited | Wholesale & retail | 2023 |
| Auto Solutions (NW) Limited | Administrative & support | 2013 |
| Auto Specialist Limited | Wholesale & retail | 2015 |
| Auto Sport Direct Ltd | Wholesale & retail | 2015 |
| Auto Sport Mobile Ltd | Wholesale & retail | 2021 |
| Auto Trans Logistics Ltd | Wholesale & retail | 2021 |
| Auto Travel Ltd | Transport & logistics | 2015 |
| Auto Tyres Bolton Ltd | Wholesale & retail | 2016 |
| Auto Vehicle Solutions & Specialists Limited | Wholesale & retail | 2013 |
| Auto-Key-Co Ltd | Wholesale & retail | 2015 |
| Auto-Over Limited | Professional & scientific | 2002 |
| Autocare Garage Services Limited | Wholesale & retail | 2007 |
| Autochem Supplier Limited | Wholesale & retail | 2023 |
| Autoclaims Limited | Other services | 2007 |
| Autoclass Ltd | Wholesale & retail | 2021 |
| Autoconsult Ltd | Wholesale & retail | 2019 |
| Autocraft Services (Bolton) Limited | Wholesale & retail | 2020 |
| Autodream Limited | Wholesale & retail | 2020 |
| Autodrive (UK) Limited | Transport & logistics | 2009 |
| Autodrivex Ltd | Wholesale & retail | 2026 |
| Autofix Bolton Limited | Wholesale & retail | 2020 |
| Autogauge Limited | Professional & scientific | 1999 |
| Autohobbies Ltd | Wholesale & retail | 2021 |
| Autohow Limited | Education | 2025 |
| Autokontrol Limited | Manufacturing | 2000 |
| Automart Bolton Ltd | Wholesale & retail | 2021 |
| Automate Control Solutions Ltd | Administrative & support | 2022 |
| AUTOMATE101 UK Limited | Information & communication | 2024 |
| Automated Access Systems Ltd | Construction | 2024 |
| Automated Security Design Limited | Professional & scientific | 2005 |
| Automatic Alarms Limited | Manufacturing | 1985 |
| Automation Systems Ltd | Information & communication | 2022 |
| Automotive Experts Private Limited | Wholesale & retail | 2023 |
| Automotive Paint Systems Ltd | Wholesale & retail | 2021 |
| Automotive Repairs Bolton Ltd | Wholesale & retail | 2020 |
| Automotive Spares Limited | Wholesale & retail | 2009 |
| Automotive Vehicle Inspections Ltd | Professional & scientific | 2025 |
| Autopaint Bolton Limited | Wholesale & retail | 2007 |
| AUTOPOWER2023 Ltd | Wholesale & retail | 2024 |
| Autosheen Ltd | Manufacturing | 2019 |
| Autoshine Pro Ltd | Wholesale & retail | 2021 |
| Autostart Bolton Ltd | Wholesale & retail | 2026 |
| Autostart Service and Repairs Bolton Ltd | Wholesale & retail | 2011 |
| Autostrada NW Limited | Administrative & support | 2025 |
| Autosystem Design Limited | Information & communication | 1996 |
| Autotec (Bolton) Ltd | Manufacturing | 2025 |