| Anna Alteration Ltd | Other services | 2023 |
| Anna Franks Marketing Ltd. | Professional & scientific | 2014 |
| Anna Kirrage Art Advisory Limited | Wholesale & retail | 2022 |
| Anna Molly Ltd | Hospitality | 2024 |
| Anna Sheri Ltd | Professional & scientific | 2024 |
| Anna Smiles Ltd | Health & social care | 2024 |
| Annabelle B Ltd | Information & communication | 2025 |
| Annabelle Rooms Limited | Administrative & support | 2015 |
| Annabels Deliciously British Ltd | Wholesale & retail | 2020 |
| Annalese Ferrari Ltd | Financial services | 2018 |
| Anne Beauty Limited | Health & social care | 2016 |
| Anne Brooke Limited | Arts & recreation | 2024 |
| Anne Nails Ltd | Other services | 2021 |
| Anne's Animal Care Limited | Other services | 2011 |
| Anne's Haven Services Limited | Hospitality | 2024 |
| Anne-Louise Limited | Wholesale & retail | 2019 |
| Annex Agency Limited | Arts & recreation | 2015 |
| Anney’S Exquisite Couture Limited | Other services | 2025 |
| Annie MAE Beauty Ltd | Other services | 2025 |
| Annisha Care Providers Ltd | Health & social care | 2020 |
| Anno Group Limited | Information & communication | 2017 |
| Anode Labs Ltd | Manufacturing | 2024 |
| Anom Enterprise Limited | Health & social care | 2014 |
| Anon UK Holding Limited | Financial services | 2004 |
| Anonymous Recordings Limited | Information & communication | 2017 |
| Anorak Limited | Water & waste | 2006 |
| Another Coffee Shop Ltd | Hospitality | 2026 |
| Another Concept Limited | Professional & scientific | 2023 |
| Another Recruitment Ltd | Administrative & support | 2019 |
| ANP Dental Ltd | Financial services | 2023 |
| Anreid Limited | Real estate | 2025 |
| Anrgp Ltd | Health & social care | 2022 |
| Anri Consulting Ltd | Administrative & support | 2017 |
| ANS Ultrasound Ltd | Health & social care | 2023 |
| Ansadec Limited | Households | 1985 |
| Ansar Ahmed Limited | Wholesale & retail | 2024 |
| Ansar Associates Ltd | Professional & scientific | 2024 |
| Ansar Estates Ltd | Real estate | 2024 |
| Ansell Broderick Arts Collective Ltd | Education | 2024 |
| Ansora Technologies Ltd | Information & communication | 2026 |
| Anstar Group Limited | Financial services | 2026 |
| Anstar Limited | Manufacturing | 2018 |
| Anstey Field Holdings Limited | Real estate | 2025 |
| Anstey Field Limited | Real estate | 2025 |
| Anstey House Management Company Limited | Households | 2025 |
| Answer Digital Limited | Information & communication | 1998 |
| Answer Digital Trustees Limited | Administrative & support | 2020 |
| Answer PAY Limited | Information & communication | 2020 |
| ANT Acquisitions Ltd | Real estate | 2024 |
| ANT CGI Limited | Manufacturing | 2014 |
| ANT Hire Solutions U.K. Limited | Administrative & support | 2019 |
| ANT Tech Ltd | Information & communication | 2020 |
| Antalya Barber (Ossett) Ltd | Other services | 2020 |
| Antalya Barber 12 Ltd | Other services | 2024 |
| Antalya Barber Commercial Ltd | Other services | 2026 |
| Antalya Barber Morley Ltd | Other services | 2023 |
| Antanda Ltd | Wholesale & retail | 2024 |
| Antares Sales Ltd | Transport & logistics | 2026 |
| Antec CTE Ltd | Construction | 2016 |
| Antela Developments Limited | Professional & scientific | 2010 |
| Antell Insurance Associates Limited | Financial services | 2001 |
| Anthill Software Limited | Information & communication | 2011 |
| Anthologie Tattoo Ltd | Arts & recreation | 2019 |
| Anthology Brewing Company Ltd | Manufacturing | 2017 |
| Anthony & Co Consulting Ltd | Professional & scientific | 2009 |
| Anthony Abhulimhen Healthcare Resources Limited | Health & social care | 2018 |
| Anthony Atkinson GAS Services Limited | Construction | 2026 |
| Anthony Hoyland Associates | | 2008 |
| Anthony Mchugh Demolition Ltd | Construction | 2015 |
| Anthony Mcwilliams Ltd | Health & social care | 2015 |
| Anthropocentric Ltd | Information & communication | 2017 |
| Anthropogenic Intelligence Limited | Information & communication | 2023 |
| Anti Drone Security Services Ltd | Construction | 2025 |
| Antiaqua Roofing Solutions Ltd | Construction | 2020 |
| Antidote Medical Limited | Health & social care | 2015 |
| Antique Haven Mart Limited | Wholesale & retail | 2024 |
| Antique Style Doors (UK) Limited | Manufacturing | 2004 |
| Antiverm Pest Control Ltd | Administrative & support | 2025 |
| Antoine Care Ltd | Health & social care | 2016 |
| Antoniagabi Removals Ltd | Construction | 2025 |
| Antonides Sourcing Limited | Wholesale & retail | 2025 |
| Antonpann Limited | Transport & logistics | 2016 |
| Antony Turner Permanent Makeup Limited | Other services | 2021 |
| Antony Turner Permanent Makeup Training Limited | Other services | 2021 |
| Antony's Hair Academy Limited | Other services | 2017 |
| Antrim Escapes Ltd | Real estate | 2026 |
| Antwerp Diamonds (UK) Limited | Extraterritorial | 2006 |
| Anubis Properties LLP | | 2008 |
| Anvi Properties Ltd | Real estate | 2017 |
| ANW Homes Limited | Real estate | 2020 |
| ANW Law Ltd | Professional & scientific | 2021 |
| ANW Real Estate Limited | Real estate | 2024 |
| Anwar Property Improvements Ltd | Construction | 2026 |
| Anxin UK Ltd | Real estate | 2020 |
| ANY Destination Private Hire Cars Ltd | Transport & logistics | 2013 |
| Anyo Cafe Ltd | Hospitality | 2025 |
| Anyo Construct Ltd | Construction | 2024 |
| Anyo Ltd | Hospitality | 2020 |
| Anything IT Limited | Information & communication | 2011 |
| Anywastegone Ltd | Water & waste | 2018 |