| AND Words Limited | Professional & scientific | 2015 |
| Andel Holdings Limited | Financial services | 2023 |
| Andel Limited | Manufacturing | 1992 |
| Anderson Engineering Group Ltd | Professional & scientific | 2022 |
| Ando Digital Ltd | Information & communication | 2022 |
| Andre Whitbourn Ltd | Information & communication | 2026 |
| Andrea Tropea Dental Laboratory Ltd | Health & social care | 2012 |
| Andrew Battye & SON Limited | Construction | 2010 |
| Andrew Croft Interiors Ltd | Construction | 2011 |
| Andrew Dyson Ltd | Extraterritorial | 2024 |
| Andrew Gammell Limited | Construction | 2003 |
| Andrew Greenhalgh Consulting Services Ltd | Professional & scientific | 2017 |
| Andrew Locke (Plumbing, Heating & Tiling Contractors) Limited | Construction | 2001 |
| Andrew Lodge Orthotics Limited | Health & social care | 2005 |
| Andrew Pochin Commercial Limited | Professional & scientific | 2012 |
| Andrews of Holmfirth Ltd | Wholesale & retail | 2025 |
| Andris Property Limited | Real estate | 2024 |
| Andy MAY Transport Services Ltd | Transport & logistics | 2019 |
| Andy Perry - Logistics & Supply Chain Solutions Ltd | Professional & scientific | 2022 |
| Andy West Limited | Professional & scientific | 2021 |
| Andyshaven Limited | Construction | 2016 |
| Anello Pizza Ltd | Hospitality | 2019 |
| Aneris Technologies Ltd | Construction | 2025 |
| Angel Trader Ltd | Wholesale & retail | 2018 |
| ANGEL11 Ltd | Real estate | 2022 |
| Angela Barraclough Limited | Real estate | 2012 |
| Anglo-U.S. Textile Machinery Corporation Limited | Real estate | 1982 |
| Anibonta Limited | Professional & scientific | 2026 |
| Anieq Riaz Limited | Wholesale & retail | 2025 |
| Anik & SON Limited | Real estate | 2019 |
| Aniqa Anjum Ltd | Health & social care | 2021 |
| Anisah Optical Ltd | Health & social care | 2025 |
| Anjum Estates Limited | Real estate | 2024 |
| Anld Investments Limited | Real estate | 2016 |
| Anmol Catering Huddersfield Ltd | Hospitality | 2025 |
| Anmol Sweet Centre Huddersfield Ltd | Hospitality | 2025 |
| Anna Kilner Ltd | Hospitality | 2026 |
| Annes Travel Consultancy Ltd | Administrative & support | 2024 |
| Anni Studios Limited | Wholesale & retail | 2026 |
| Annjum Trading Limited | Wholesale & retail | 2020 |
| Anonc Limited | Health & social care | 2017 |
| Another Day of Sun Ltd | Information & communication | 2023 |
| Another Digital Marketing Dimension Ltd | Professional & scientific | 2025 |
| Another Way Digital Limited | Information & communication | 2023 |
| Anovobio Limited | Water & waste | 2026 |
| Anrs Investments Ltd | Real estate | 2023 |
| ANS Asset Management Ltd | Real estate | 2023 |
| Ansaar Empire Ltd | Wholesale & retail | 2023 |
| Ansaar FAM Limited | Wholesale & retail | 2024 |
| Ansk Properties Ltd | Real estate | 2022 |
| Anthony Hickling Electrical Limited | Construction | 2020 |
| Antich & Sons (Huddersfield) Limited | Manufacturing | 2004 |
| Antich Fine Tailors Ilkley Limited | Wholesale & retail | 2024 |
| Anxious Andy Ltd | Wholesale & retail | 2021 |
| Anyroller UK Ltd | Transport & logistics | 2026 |
| Anytrader Ltd | Wholesale & retail | 2026 |
| Anywhere Anytime Airports Service Ltd | Transport & logistics | 2024 |
| Anywhere YOU Like Travels Ltd | Transport & logistics | 2024 |
| AO Apex Healthcare Limited | Professional & scientific | 2022 |
| AO Construction Yorkshire Ltd | Construction | 2025 |
| Aomuk Ltd | Wholesale & retail | 2025 |
| Aornis Process Ltd | Construction | 2021 |
| AOS Empire Ltd | Wholesale & retail | 2023 |
| AOV U.K Ltd | Construction | 2022 |
| AP Data Services Limited | Information & communication | 2015 |
| AP Executive Travel Ltd | Transport & logistics | 2025 |
| AP Media Films Ltd | Information & communication | 2025 |
| AP Media Group UK Ltd | Information & communication | 2017 |
| AP Pharma Services Ltd | Health & social care | 2009 |
| AP Premier Travel Ltd | Transport & logistics | 2022 |
| AP Projects (Yorkshire) DEV 1 Limited | Construction | 2026 |
| AP Projects (Yorkshire) Limited | Construction | 2020 |
| AP002 Ltd | Arts & recreation | 2025 |
| Apace Limited | Information & communication | 2022 |
| Apact Ltd | Real estate | 2018 |
| Apas Management PTE Limited | Professional & scientific | 2003 |
| APB Catering Limited | Hospitality | 2026 |
| APB Entertainment Limited | Arts & recreation | 2024 |
| APB Gaming Limited | Arts & recreation | 2026 |
| APB Print Finishing Services Limited | Professional & scientific | 2013 |
| APB Sullivan Limited | Hospitality | 2025 |
| APD Bird Limited | Financial services | 2021 |
| Apec Empire Ltd | Wholesale & retail | 2024 |
| Apema Ltd | Professional & scientific | 2026 |
| Apex Aluminium Solutions Ltd | Construction | 2024 |
| Apex CAD Manuals Limited | Professional & scientific | 2019 |
| Apex Capital Group Ltd | Wholesale & retail | 2024 |
| Apex Career Consultants Ltd | Professional & scientific | 2021 |
| Apex Claims and Hires Ltd | Wholesale & retail | 2025 |
| Apex Eco Cleaning Services Ltd | Administrative & support | 2025 |
| Apex EM Health Ltd | Health & social care | 2023 |
| Apex Infrastructure Services Ltd | Construction | 2021 |
| Apex MSK Ltd | Health & social care | 2026 |
| Apex Oral Health Ltd | Health & social care | 2026 |
| Apex Pathway Limited | Health & social care | 2019 |
| Apex Performance Cars Limited | Wholesale & retail | 2016 |
| Apex Properties Global Ltd | Financial services | 2024 |
| Apex Property Solutions Group Ltd | Real estate | 2024 |
| Apex Strategies Ltd | Public administration | 2021 |
| APEX91 Ltd | Wholesale & retail | 2021 |