| Anna Kessel Ltd | Arts & recreation | 2025 |
| Annabel's Coffee Shop Limited | Hospitality | 2026 |
| Annays Haulage Ltd | Transport & logistics | 2022 |
| Anne Ritchie Ltd | Real estate | 2021 |
| Anneloumark Limited | Hospitality | 2024 |
| Annexus Ltd | Wholesale & retail | 2011 |
| Annies Fishers (Wakefield) Limited | Other services | 2024 |
| Annolight Limited | Real estate | 1988 |
| Anotek Engineering Limited | Professional & scientific | 2023 |
| Anov Filming Company Limited | Information & communication | 2025 |
| ANP Associates Ltd | Health & social care | 2017 |
| Anpi Plumber Ltd | Construction | 2023 |
| Anrf Limited | Wholesale & retail | 2021 |
| Ansbro Holdings Ltd | Construction | 2018 |
| Ansh Maheshwari Ltd | Professional & scientific | 2025 |
| Antalya Barber Shop Ltd | Other services | 2019 |
| Antenna Rigging Services Limited | Information & communication | 2011 |
| Antep Dessert Limited | Manufacturing | 2023 |
| Anthalope Limited | Transport & logistics | 2018 |
| Anthony Alexander Ltd | Construction | 2025 |
| Anthony Leyton Limited | Administrative & support | 2014 |
| Anthony Snowden Architect Limited | Professional & scientific | 2017 |
| Anti-Waste (Restoration) Limited | Water & waste | 1994 |
| Anti-Waste Limited | Water & waste | 1981 |
| Antibody Store Limited | Manufacturing | 2016 |
| Anto Milan Ltd | Transport & logistics | 2025 |
| Antonelle Ltd | Wholesale & retail | 2026 |
| Antonia Ltd | Construction | 2023 |
| Antonio TM Solutions Ltd | Public administration | 2023 |
| Antony Ball Consulting Limited | Professional & scientific | 2025 |
| ANTSSERVICE97 Ltd | Public administration | 2023 |
| Antz Traffic Management Ltd | Public administration | 2024 |
| ANW Food Limited | Wholesale & retail | 2023 |
| ANY Sense Media Limited | Information & communication | 2025 |
| Anya Dahl Interior Design Limited | Professional & scientific | 2016 |
| Anyox Properties Ltd | Real estate | 2025 |
| Anything Anywhere Anytime Ltd | Other services | 2023 |
| ANZ Properties Investment Ltd | Real estate | 2025 |
| AO Food Limited | Hospitality | 2026 |
| AOB Investments Doncaster Limited | Real estate | 2025 |
| Aotearoa Holdings Ltd | Real estate | 2020 |
| AP Commerce Ltd | Real estate | 2021 |
| AP Financial Consultant Ltd | Professional & scientific | 2025 |
| AP Legacy Ltd | Real estate | 2024 |
| AP Parts Limited | Wholesale & retail | 2021 |
| AP Software Engineering Ltd | Information & communication | 1998 |
| AP South Yorkshire Investment Ltd | Real estate | 2018 |
| AP Training Services Ltd | Administrative & support | 2022 |
| AP Yorkshire Construction Limited | Construction | 2019 |
| AP Yorkshire Lettings Ltd | Real estate | 2018 |
| Aparadox Ltd | Hospitality | 2021 |
| Aparlour Ltd | Hospitality | 2019 |
| Aparthouse Property Management Limited | Real estate | 2023 |
| APC (GB) Limited | Manufacturing | 1997 |
| Apco Sign Systems International Limited | Manufacturing | 2014 |
| Apco Sign Systems Limited | Manufacturing | 2014 |
| APD South Yorkshire Investment Ltd | Real estate | 2024 |
| APE Construction Ltd | Construction | 2025 |
| Aperna Limited | Professional & scientific | 2023 |
| Apex Art Handling Ltd | Arts & recreation | 2019 |
| Apex Car Studio Ltd | Wholesale & retail | 2026 |
| Apex Cornerstone Holdings LLP | | 2025 |
| Apex Design & Print Ltd | Manufacturing | 2003 |
| Apex Green Solutions Ltd | Wholesale & retail | 2022 |
| Apex Live Productions Limited | Administrative & support | 2022 |
| Apex Motor Group Doncaster Limited | Wholesale & retail | 2026 |
| Apex Private Medicalcare Ltd | Health & social care | 2026 |
| Apex Renewable Energy Ltd | Professional & scientific | 2020 |
| Apex Renewable Energy Surveys Limited | Wholesale & retail | 2022 |
| Apex Renewable Surveys Ltd | Professional & scientific | 2025 |
| Apex Roofing Cladding Systems Limited | Construction | 2022 |
| Apex Roofing Contractors Ltd | Construction | 2020 |
| Apex Rope Access Limited | Construction | 2024 |
| Apex Sales Group Ltd | Administrative & support | 2026 |
| Apex Security Systems Ltd | Administrative & support | 2025 |
| Apex Siteworks Ltd | Extraterritorial | 2026 |
| Apex Strategic Advisory Ltd | Professional & scientific | 2026 |
| Apexcontracting Ltd | Construction | 2025 |
| Apexworks Engineering Consultants Ltd | Extraterritorial | 2015 |
| APH Motors Ltd | Wholesale & retail | 2022 |
| Aphrodite Group Ltd | Other services | 2024 |
| Apical Property Development Ltd | Construction | 2020 |
| Apis Space Holding Limited | Financial services | 2024 |
| APM Engineering Solutions Ltd | Construction | 2026 |
| APM Property Services Ltd | Construction | 2021 |
| Apollo Customer Solutions Ltd | Professional & scientific | 2014 |
| Apollo Electrical Yorkshire Limited | Construction | 2022 |
| Apollo Holdco Limited | Construction | 2001 |
| Apollo Medicine Services Ltd | Health & social care | 2013 |
| Apollo Projects Ltd | Construction | 2025 |
| Apollo Support Services Group Limited | Administrative & support | 2005 |
| Apos Aris Ltd | Financial services | 2018 |
| Apothecary 87 Barbers & Shop (Doncaster) Ltd | Other services | 2022 |
| Apothecary 87 Barbers & Shop Ltd | Other services | 2020 |
| Apothecary 87 Ltd | Wholesale & retail | 2013 |
| Apothecary Beauty Limited | Other services | 2019 |
| Appacy Ltd | Information & communication | 2023 |
| Appdigitally Limited | Information & communication | 2021 |
| Appealing Limited | Health & social care | 2024 |
| Applaud Business Consultancy Limited | Administrative & support | 2022 |