| ANS Limited | London | 1981 |
| ANS OIL & Energy Consultants Ltd | Glasgow | 2017 |
| Ansah Templeton Chambers Limited | Orpington | 2020 |
| Anshun International Co., Limited | London | 2017 |
| Ansion Limited | Orpington | 2016 |
| Ansley Limited | Hove | 2000 |
| Anslow Park Management Company Limited | Burton On Trent | 2005 |
| Anslow Road 1968 Limited | Burton-On-Trent | 2014 |
| Anson Diamond Limited | Newcastle Upon Tyne | 2024 |
| Anson Hewlett Limited | Harrogate | 2025 |
| Ansonmetal Co., Ltd | West Midlands, England, | 2018 |
| Anssos Investment Limited | London | 2023 |
| Anssos Limited | London | 2023 |
| Anstey Estate Trading Ltd | Bideford | 2012 |
| Anstey Holdings Limited | Bournemouth | 2022 |
| Anstey Wallpaper Company Limited | London | 1974 |
| Ansty Productions Limited | Small Dole | 2012 |
| Answer Financial Limited | B I A Christchurch | 2003 |
| Answer Marine Ltd | West Midlands, England | 2023 |
| Answerbuy Limited | Banbury | 1987 |
| ANT Antiques Limited | Bury St. Edmunds | 2016 |
| ANT MCR Limited | Ancoats Urban Village | 2020 |
| ANT Morris Ltd | Stoke-On-Trent | 2021 |
| Ant.Li Property Ltd | Glasgow | 2021 |
| Antaja Market Ltd | Heywood | 2024 |
| Antares Star Ltd | London | 2018 |
| Antech Industry Limited | London | 2026 |
| Antelope Trading Limited | Swansea | 2009 |
| Antenna Records Limited | Market Drayton | 2001 |
| Antenna Systems Design & Installation Ltd | Belfast | 2020 |
| Antex Aerials Limited | Glasgow | 2012 |
| Anthesis Property Management Ltd. | Wolverhampton | 2017 |
| Anthistle Craven Ltd | Buckingham | 2003 |
| Anthology Services Ltd | Kent | 2003 |
| Anthony Barker Ltd | Congleton | 2025 |
| Anthony Capaldi Ltd | Glasgow | 2024 |
| Anthony Crook Motors Limited | Preston | 2014 |
| Anthony Edward Dandy Ltd | Weston-Super-Mare | 2024 |
| Anthony Elijah Thomas Ltd | Manchester | 2024 |
| Anthony Green and Spencer Holdings Limited | London | 2016 |
| Anthony John Finney Ltd | Stoke-On-Trent | 2025 |
| Anthony Lewis Peart Ltd | Wembley | 2022 |
| Anthony Martyn Donnelly Ltd | Wolverhampton | 2025 |
| Anthony Mcneill Limited | Largs | 2011 |
| Anthony Moss & Associates Ltd | London | 2001 |
| Anthony Russell Limited | Braintree | 2009 |
| Anthony Stephen Laybourne Ltd | Sunderland | 2025 |
| Anthony Stoker Limited | London | 2016 |
| Anthony Taylor Limited | Exeter | 2002 |
| Anthonybobbie Limited | Lings | 2014 |
| ANTHONYCHACHA080576 Ltd | Swindon | 2024 |
| Anthropologie UK Limited | London | 2009 |
| Anthurium Legionum Ltd | London | 2014 |
| Anti - Graffiti Systems (UK) Limited | Brighton | 2003 |
| Anti Pesto Limited | Bristol | 2001 |
| Antiagingmission Ltd | Enfield | 2025 |
| ANTICIP8 Science Limited | Penicuik | 2009 |
| Antidote Clothing Limited | Buntingford | 2025 |
| Antigoni Ltd | Bromley | 2025 |
| Antik Yachting Limited | Blackpool | 2023 |
| Antin Nominees Limited | London | 2003 |
| Antiquarian Books Limited | Skipton | 1970 |
| Antiquarian Prints Limited | Skipton | 1977 |
| Antique Holdings Ltd | Norwich | 2023 |
| Antiqueforsale Limited | Chertsey | 2013 |
| Antiques ARE Green Limited | Beaconsfield | 2009 |
| Antiques by Jules Limited | London | 2001 |
| Antiquespages Ltd | Worcester | 2000 |
| Antiquities Order of Shlomoh Limited | London | 2024 |
| Antistatic Limited | Harrow | 1998 |
| Antivibe (Hull) Limited | Bristol | 1997 |
| Antler Wood Limited | Stevenage | 2025 |
| Anto Link Nutrition Co., Ltd | Gillingham | 2017 |
| Antoine Villa Limited | Penzance | 1965 |
| Antoinette Christine Gilbert Ltd | Helston | 2024 |
| Anton Dover Ltd | Dover | 2023 |
| Anton Studio Designs Limited | London | 2022 |
| Antoni Antoniewicz Ltd | London | 2025 |
| Antonio Kiri Joseph Giovanni Ltd | Barnet | 2024 |
| Antonio Limited | London | 2025 |
| Antonio Sensati Limited | London | 2025 |
| Antony Derek Jones Limited | Barnet | 2025 |
| Antony R. White Luxury Fitted Bedrooms & Home Study Limited | Stoke Gifford | 2003 |
| Antq Ltd | London | 2023 |
| Antrain Limited | Alcester | 2025 |
| Antrim Business Park Management Company Limited | Fivemiletown | 2006 |
| Antrim Coal Company Limited | Crumlin | 1985 |
| Antrim Feeds Limited | Belfast | 1964 |
| Antrim Road Apartments Management Co. Ltd | Belfast | 2007 |
| Antur 4X4 Ltd | Caerfyrddin | 2024 |
| Antwerp Diamonds (UK) Limited | Leeds | 2006 |
| Antwerp Holdings Limited | Bury | 2018 |
| Anubi Dream Factory Ltd | London | 2025 |
| Anve Limited | London | 2010 |
| Anvesi Ltd | Manchester | 2023 |
| Anvil Inns (Lastingham) Limited | Cleethorpes | 2007 |
| Anvil UK Bidco Limited | Birmingham | 2025 |
| ANW TDS (Nominee 1) Limited | London | 2018 |
| ANW TDS (Nominee 2) Limited | London | 2018 |
| Anwa Ltd | London | 2021 |