| Alps Marketing Limited | Professional & scientific | 2019 |
| Alston Hill Ltd. | Financial services | 2008 |
| Alston Hill Services Ltd | Professional & scientific | 2026 |
| Altaf Orbit Store Limited | Wholesale & retail | 2025 |
| Altham Oak Bespoke Structures Limited | Manufacturing | 2015 |
| AM Services (Pendle) Ltd | Transport & logistics | 2025 |
| AM77 Limited | Real estate | 2025 |
| Amaan Builder Ltd | Construction | 2025 |
| Amam Ltd | Information & communication | 2024 |
| Ambas Foods Limited | Wholesale & retail | 2020 |
| Ambiente-I Limited | Professional & scientific | 2006 |
| Amcfs Ltd | Real estate | 2019 |
| Amelotte Limited | Real estate | 2021 |
| Amerinza Fashion Limited | Manufacturing | 2025 |
| Amigo Takeaway Limited | Hospitality | 2019 |
| Amin Aquatics and Exotics Ltd | Wholesale & retail | 2017 |
| AMK Motor Works Ltd | Wholesale & retail | 2026 |
| Ampasado Ltd | Construction | 2025 |
| AMS Props Master Ltd | Administrative & support | 2012 |
| Anarkali Designers Ltd | Wholesale & retail | 2023 |
| Anarkali Fashions Ltd | Wholesale & retail | 2023 |
| Anarkali Fashions Nelson Ltd | Wholesale & retail | 2025 |
| Anderson Joinery Solutions Ltd | Construction | 2025 |
| Andrew Penswick Ltd | Extraterritorial | 2024 |
| Angles of Barrowford Limited | Other services | 2021 |
| Anji's Coffee and Kitchen Limited | Hospitality | 2023 |
| ANM Designs Ltd | Administrative & support | 2025 |
| Anocazion Ltd | Wholesale & retail | 2022 |
| Antech Solutions (NW) Ltd | Information & communication | 2025 |
| Anthony Dawson Real Estate Limited | Real estate | 2023 |
| Anvic Solutions Limited | Professional & scientific | 2019 |
| Anwar Jewellers Limited | Wholesale & retail | 2015 |
| AO Legal Consultancy Ltd | Professional & scientific | 2024 |
| AP Inns and Taverns Ltd | Hospitality | 2018 |
| Apex Advisory Services Ltd | Information & communication | 2023 |
| Apex Blinds & Shutters Ltd | Wholesale & retail | 2026 |
| Apex Collaborative Trust | Education | 2017 |
| Apex Components Ltd | Wholesale & retail | 2026 |
| Apex Electrical Solutions Northwest Ltd | Construction | 2026 |
| Apex Frozen Limited | Wholesale & retail | 2026 |
| Apex Group Consortium Limited | Financial services | 2026 |
| Apex Hiring Ltd | Administrative & support | 2025 |
| Aplus Gleam Ltd | Administrative & support | 2025 |
| Apna Legal Ltd | Professional & scientific | 2012 |
| Apna Superstore Ltd | Wholesale & retail | 2020 |
| Appconnect Ltd | Information & communication | 2019 |
| Appealchange Limited | Health & social care | 2026 |
| Apple Property Developments Limited | Real estate | 2016 |
| APT Controls Limited | Manufacturing | 2018 |
| AQL Automatic Quality for Less Limited | Wholesale & retail | 2023 |
| Aquaclean Cleaning Ltd | Other services | 2019 |
| Aquapac Group Limited | Financial services | 2021 |
| Aquaspira Limited | Manufacturing | 2007 |
| AR Comforts Limited | Wholesale & retail | 2026 |
| AR Produce Ltd | Wholesale & retail | 2025 |
| ARA Advisory Ltd | Professional & scientific | 2016 |
| ARA Lancs Ltd | Wholesale & retail | 2020 |
| Aramco Ltd | Professional & scientific | 2017 |
| Arbilliproperties Ltd | Real estate | 2019 |
| ARC Elevators Holdings Ltd | Real estate | 2012 |
| Areeb's Store Limited | Wholesale & retail | 2025 |
| Argand 2200 Limited | Other services | 2020 |
| Argand 800 Limited | Other services | 2020 |
| Argand Limited | Other services | 2020 |
| Aries Healthcare Group Limited | Health & social care | 2020 |
| Aries Land UK Limited | Real estate | 2011 |
| ARIF150 Mubashar Trading Limited | Wholesale & retail | 2026 |
| Arish Standard Ltd | Hospitality | 2026 |
| Arman Builders Limited | Construction | 2025 |
| Arman Hussain Couriers Ltd | Transport & logistics | 2025 |
| Arrow Car Repairs Limited | Wholesale & retail | 2018 |
| Arthur Padgett Authorised Plumbers Ltd | Construction | 2008 |
| Artium Automotive Lighting Ltd | Wholesale & retail | 2024 |
| AS Rana Ltd | Hospitality | 2021 |
| AS9102 Consultancy Ltd | Professional & scientific | 2022 |
| Ascotex Limited | Manufacturing | 1966 |
| Asha Indian Takeaway (Brierfield) Limited | Hospitality | 2015 |
| Ashburn Stoves Limited | Wholesale & retail | 2013 |
| Ashlyn Concepts Ltd | Wholesale & retail | 2026 |
| Ashworth Jewellers Limited | Wholesale & retail | 2018 |
| Ashworty Ltd | Information & communication | 2011 |
| Asian Cuisine Restaurant Limited | Hospitality | 2018 |
| Asif Meat Company Limited | Wholesale & retail | 2023 |
| ASK Grill Ltd | Hospitality | 2026 |
| Asma 101 Limited | Professional & scientific | 2024 |
| Aspire UK Interiors Limited | Manufacturing | 2018 |
| Assessing Solutions Ltd | Professional & scientific | 2010 |
| Assured Inheritance Ltd | Financial services | 2015 |
| Astra Care Holdings Limited | Professional & scientific | 2014 |
| Astra Care Services Limited | Health & social care | 2003 |
| Atantooil Waste Ltd | Water & waste | 2025 |
| ATC Plumbing and Heating Ltd | Construction | 2018 |
| Athena Electrical Services Ltd | Wholesale & retail | 2021 |
| Atkinson Cleaning Services Limited | Administrative & support | 2001 |
| Atlantis Incorporated Ltd | Wholesale & retail | 2023 |
| ATM Construction Services Limited | Construction | 2008 |
| Atree Commercial Management Ltd | Real estate | 2022 |
| Atree Industrial Management Ltd | Real estate | 2022 |
| Atree Management Ltd | Real estate | 2022 |
| Atree Residential Management Ltd | Real estate | 2024 |