| Ansar Projects | Health & social care | 2019 |
| Ansco Enterprises Ltd | Health & social care | 2019 |
| Anseris Ltd | Information & communication | 2024 |
| Anseris Mons Limited | Professional & scientific | 2014 |
| Anshvi Limited | Wholesale & retail | 2025 |
| Ansian Property Ltd | Real estate | 2024 |
| Anson Studios Limited | Other services | 2025 |
| Ansons Global Limited | Real estate | 2003 |
| Ansonsco 4 Limited | Wholesale & retail | 2015 |
| Anstee Holdings Ltd | Administrative & support | 2021 |
| Anstee (UK) Ltd | Construction | 2008 |
| Anstee Indication Systems Limited | Manufacturing | 2022 |
| Ansuka Limited | Construction | 2020 |
| ANT Recruitment Ltd | Administrative & support | 2023 |
| Antaf Inc Ltd | Transport & logistics | 2020 |
| Antalya Foods Birmingham Ltd | Hospitality | 2025 |
| Antalya Grill Food Ltd | Hospitality | 2023 |
| Antalya UK Aesthetics Ltd | Health & social care | 2024 |
| Antalya WM Ltd | Hospitality | 2026 |
| Antcar Global Limited | Transport & logistics | 2017 |
| Antcliff Landscape Limited | Administrative & support | 2014 |
| Antegrity Services Ltd | Health & social care | 2024 |
| Antep Express Ltd | Hospitality | 2018 |
| Antera Kitchens Birmingham Ltd | Hospitality | 2025 |
| Anterior SS Ltd | Administrative & support | 2022 |
| Anthology (Stratford Mill) Management Company Limited | Households | 2021 |
| Anthology (the Chimes) Management Company Limited | Households | 2022 |
| Anthony Emery Ltd | Professional & scientific | 2018 |
| Anthony Hewson Tree Services Limited | Agriculture & fishing | 2025 |
| Anthony J. Spectre Ltd | Administrative & support | 2019 |
| Anthony Jordan Limited | Transport & logistics | 2018 |
| Anthony Kawesha Limited | Health & social care | 2012 |
| Anthony King Partnership Limited | Administrative & support | 2011 |
| Anthony Lesley Ltd | Other services | 2018 |
| Anthony Thomas Ltd | Real estate | 2011 |
| Anthony&Son Transport Limited | Transport & logistics | 2017 |
| Anthus Pharma Newport Ltd | Wholesale & retail | 2025 |
| Anti Graffiti Spray Limited | Information & communication | 2017 |
| Anti-Gen Limited | Wholesale & retail | 2021 |
| Antibes Design Limited | Professional & scientific | 2024 |
| Antique Hypermarket Holdings Limited | Financial services | 2024 |
| Antique Hypermarket Limited | Real estate | 1966 |
| Antiques Corious Creations Ltd | Wholesale & retail | 2026 |
| Antofagasta Inter LP | | 2015 |
| Antomada Construction Limited | Construction | 2023 |
| Anton Automotive Limited | Wholesale & retail | 2023 |
| Anton Dmitriev Ltd | Construction | 2026 |
| Anton Flow Ltd | Transport & logistics | 2025 |
| Anton Property (UK) Limited | Real estate | 2017 |
| Anton Scaffolding Limited | Construction | 2021 |
| Antonio HGV Ltd | Transport & logistics | 2021 |
| Antonioflowdelivery Ltd | Transport & logistics | 2025 |
| Antony Fast Food Ltd | Hospitality | 2020 |
| Antrim 4 That Smile Ltd | Real estate | 2011 |
| Antringham Developments Limited | Construction | 2000 |
| Antringham Properties Ltd | Real estate | 2020 |
| Antser Group Limited | Information & communication | 2022 |
| Antsy & Fisher Limited | Other services | 2017 |
| Antum Aluminum UK Limited | Wholesale & retail | 2023 |
| Antz Maintenantz Ltd | Construction | 2022 |
| Antz Retail Ltd | Wholesale & retail | 2024 |
| ANU Dimension Limited | Manufacturing | 2016 |
| Anugraham HCA Ltd | Health & social care | 2023 |
| Anum & Co Retail Ltd | Wholesale & retail | 2026 |
| Anunu Limited | Wholesale & retail | 2016 |
| Anuraj Agencies UK Ltd | Wholesale & retail | 2022 |
| Anush Landmark Ltd | Health & social care | 2018 |
| Anushi Ltd | Hospitality | 2019 |
| Anuuk Ltd | Professional & scientific | 2022 |
| Anvaro Holdings Ltd | Construction | 2019 |
| Anvee AZ Ltd | Wholesale & retail | 2024 |
| Anvee Limited | Financial services | 2018 |
| Anvee Living Ltd | Wholesale & retail | 2026 |
| Anvil Build Limited | Construction | 2015 |
| Anvil Ironcraft Ltd | Manufacturing | 2021 |
| Anvil UK Bidco Limited | Extraterritorial | 2025 |
| Anvora Digital Solutions Ltd | Professional & scientific | 2025 |
| Anwer Healthcare Limited | Health & social care | 2016 |
| Anxt Ltd | Wholesale & retail | 2019 |
| ANY Class Mot’S Ltd | Wholesale & retail | 2025 |
| ANY Energy Limited | Administrative & support | 2019 |
| ANY House Sold Ltd | Administrative & support | 2014 |
| ANY House Wanted Ltd | Real estate | 2019 |
| ANY Property for Cash.Com Ltd | Real estate | 2020 |
| ANY TOM Dick & Harry Limited | Extraterritorial | 2024 |
| ANY Type Screws & Fixings Ltd | Manufacturing | 2023 |
| ANY Tyre Solution Ltd | Wholesale & retail | 2025 |
| Anya Electrical Services Limited | Construction | 2022 |
| Anya Food Store Ltd | Wholesale & retail | 2021 |
| Anya Kaur Bhatoa Ltd | Extraterritorial | 2024 |
| Anyanavya Limited | Health & social care | 2019 |
| Anyanta IG Limited | Health & social care | 2020 |
| Anydoor.Uk Ltd | Construction | 2022 |
| Anyevenze Ltd | Administrative & support | 2009 |
| Anyhost Ltd | Information & communication | 2022 |
| Anyi Links Limited | Administrative & support | 2025 |
| Anymix Limited | Extraterritorial | 1930 |
| Anyquant Technologies Ltd | Information & communication | 2023 |
| Anything Anywhere Ltd | Wholesale & retail | 2016 |
| ANYTHING4FOOD Ltd | Hospitality | 2025 |