| Anton AJ Limited | Other services | 2022 |
| Antonio P.V.R Ltd | Hospitality | 2024 |
| Antony Allen Ltd | Manufacturing | 2014 |
| Anvewo | Professional & scientific | 2023 |
| ANY Scaffolding & Access Products Limited | Administrative & support | 2015 |
| Anyati Incorporated Limited | Transport & logistics | 2020 |
| Anystack Limited | Information & communication | 2025 |
| AOK Events EOT Limited | Other services | 2023 |
| AOK Events Limited | Arts & recreation | 2000 |
| AP & Co. Ltd. | Wholesale & retail | 2010 |
| AP & Co. Wholesale Ltd | Wholesale & retail | 2025 |
| AP Fire Ltd | Public administration | 2025 |
| AP North West Limited | Extraterritorial | 2013 |
| Apex 119 Electrical Engineering Ltd | Construction | 2026 |
| Apex Alloy Wheel Refurbishment Limited | Wholesale & retail | 2026 |
| Apex Composite Innovations Ltd | Administrative & support | 2024 |
| Apex Engineering and Fabrication Ltd | Manufacturing | 2003 |
| Apex Fit-Testing Solutions Ltd | Professional & scientific | 2018 |
| Apex Health and Fitness Centre Ltd | Arts & recreation | 2001 |
| Apex Medical Engineering Limited | Wholesale & retail | 2010 |
| APH Brickwork Limited | Construction | 2018 |
| API Mortgage Centre Limited | Financial services | 2026 |
| APK Electrical Ltd | Construction | 2016 |
| Apollo Douglas Ltd | Administrative & support | 2020 |
| Aposs Ltd | Administrative & support | 2010 |
| Apple Fitness Ltd | Arts & recreation | 2013 |
| Apple Sweet Cleaning Services Ltd | Water & waste | 2017 |
| Appleton & Associates ISW Ltd | Health & social care | 2025 |
| Appleton Farming Limited | Agriculture & fishing | 2016 |
| Appleton Solutions Limited | Administrative & support | 2005 |
| Applewood Property Limited | Real estate | 2017 |
| Appley Bridge Enterprises Limited | Real estate | 2014 |
| Appley Bridge Landscapes Limited | Administrative & support | 2017 |
| Appley Bridge Limited | Transport & logistics | 2020 |
| Appliance Geeks Ltd | Other services | 2022 |
| APS Industrial Engineering Ltd | Manufacturing | 2018 |
| Aqua Bioscience Limited | Manufacturing | 2012 |
| Aqua Plumbing & Heating Limited | Construction | 2006 |
| Aqua Plumbing & Heating NW Ltd | Construction | 2018 |
| Aqua Safety Showers International Ltd | Administrative & support | 2016 |
| Aquaspeed Drain Services LLP | | 2008 |
| Aquatek Bathrooms Ltd | Construction | 2022 |
| AR Ceilings & Partitions Ltd | Construction | 2024 |
| Araa 86 Ltd | Real estate | 2025 |
| Aranga Services Ltd | Financial services | 2023 |
| ARC Properties Wigan Ltd | Real estate | 2024 |
| ARC Training and Development Wigan Ltd | Education | 2025 |
| Archbrook Limited | Hospitality | 1985 |
| Architectural Vision Ltd | Professional & scientific | 2025 |
| Arcodon | Professional & scientific | 2026 |
| Arcteos | Professional & scientific | 2026 |
| ARCTIC137 Limited | Wholesale & retail | 2024 |
| Arcticus Ltd | Wholesale & retail | 2019 |
| ARD Management Ltd | Households | 2025 |
| Ardanus Ltd | Professional & scientific | 2026 |
| Arden Estate (NW) Ltd | Real estate | 2013 |
| Area Plumbing & Electrics Limited | Construction | 2005 |
| Ares Services UN Ltd | Professional & scientific | 2022 |
| ARG Food and Wine Ltd | Wholesale & retail | 2017 |
| ARG United Food and Wine Ltd | Wholesale & retail | 2022 |
| Argo Services Limited | Professional & scientific | 1998 |
| Argo Strategic Land and Development Ltd | Real estate | 2022 |
| ARH Retail Concepts & Consultancy Ltd | Professional & scientific | 2020 |
| Aria Rose Limited | Hospitality | 2020 |
| Ariane M Homes Limited | Real estate | 2022 |
| Arid Agritec Limited | Professional & scientific | 2006 |
| Arise Digital Media Limited | Manufacturing | 2016 |
| Arising Stars CIC | Education | 2026 |
| Ariya Grace Ltd. | Professional & scientific | 2020 |
| ARK (NW) Limited | Construction | 2023 |
| ARK Consulting and Associates Limited | Information & communication | 2014 |
| Arkham Medical Ltd | Health & social care | 2021 |
| ARL Consulting Limited | Professional & scientific | 1998 |
| Arley Cabinet Co. Limited | Manufacturing | 1952 |
| Arley One Ltd | Professional & scientific | 2015 |
| Arlo Care Limited | Health & social care | 2022 |
| Armadora Yachts UK Ltd | Manufacturing | 2015 |
| Armconsulting.Tech Ltd | Information & communication | 2025 |
| Armed Forces Community HQ CIC | Other services | 2018 |
| Armor Cleaning Limited | Administrative & support | 2018 |
| Armour Estates Ltd | Real estate | 2016 |
| Armoury Bank Garage Limited | Wholesale & retail | 2015 |
| Armstrong Nield Ltd | Administrative & support | 2017 |
| Armstrong Watches Ltd | Manufacturing | 2026 |
| Arnolds Automotive Ltd | Transport & logistics | 2020 |
| Aroma Cafe Limited | Hospitality | 2019 |
| Arooz Limited | Wholesale & retail | 2021 |
| Arrow XL Limited | Transport & logistics | 2002 |
| Arrowhead Solutions Limited | Information & communication | 2014 |
| Arrox Holdings Limited | Real estate | 2011 |
| Art of Persia Ltd | Hospitality | 2023 |
| Artech Shadow Industries Limited | Information & communication | 2025 |
| Artemis Commercial Ltd | Professional & scientific | 2024 |
| Arthjaco | Professional & scientific | 2025 |
| Articon Ltd | Construction | 2017 |
| Articulation Ltd | Professional & scientific | 2024 |
| Artifex Contractors Limited | Construction | 2022 |
| Artificial Living Ltd | Other services | 2022 |
| Artisan Desserts Limited | Hospitality | 2017 |
| Arts of Life Ltd | Professional & scientific | 2022 |