| Antoine Markell Clothing Company Ltd | London | 2025 |
| Antoinette Antoine Media Ltd | Tilbury | 2026 |
| Antoleon Ltd | London | 2018 |
| Antolin Interiors UK Limited | Redditch | 1982 |
| Anton Aviation Services Ltd | London | 2024 |
| Anton Coaker English Timber Limited | Plymouth | 2004 |
| Anton Contracting Ltd | Derby | 2019 |
| Anton Hazelle Limited | Princes Risborough | 2008 |
| Anton Laurence Couture Limited | Croydon | 2008 |
| Antone Displays Holdings Limited | Leicester | 2017 |
| Antone Displays Limited | Leicester | 1970 |
| Antonelli Bros.Limited | Manchester | 1963 |
| Antonia Bronze Couture Ltd | Croydon | 2024 |
| Antonia Claudie Limited | London | 2023 |
| Antonia DE Luca Millinery Limited | Sevenoaks | 2025 |
| Antonia Guise Ltd | London | 2018 |
| Antonia Mann Limited | Ipswich | 2015 |
| Antonia Wills Saddles Ltd | Daventry | 2023 |
| Antonics Global Production & Logistics Limited | Burscough | 2024 |
| ANTONIE@AVIATION77 Ltd | Cambridge | 2025 |
| Antonine Printing Inks Limited | Motherwell | 1979 |
| Antonio Bonanno Diamond Setter Ltd | Colchester | 2026 |
| Antonio Cannizzo Design Ltd | London | 2016 |
| Antonio Craft Aviation Ltd | Cambridge | 2025 |
| Antonio Pacelli Limited | London | 2006 |
| Antonio Upholstery Ltd | London | 2016 |
| Antonio Woodwork Limited | Waltham Cross | 2023 |
| Antoniou Group Limited | Beaconsfield | 2018 |
| Antonioyifanli Ltd | London | 2025 |
| Antons Fabrications Limited | Greenock | 2015 |
| Antony Allen Ltd | Wigan | 2014 |
| Antony Craske Ltd | Cambridge | 2024 |
| Antonym Ltd | London | 2021 |
| Antrica Limited | Bray | 2007 |
| Antrim Hills Spring Water Company Limited | Ballyclare | 1989 |
| Antrotech Limited | Borehamwood | 2014 |
| Antsnest Games Ltd | Leighton Buzzard | 2025 |
| Antson Engines Limited | Wembley | 2016 |
| Antur Waunfawr | Gwynedd | 1984 |
| Antvic Craft Studio Ltd | Chigwell | 2024 |
| Antwhistle Aviation Ltd | Middlesborough | 2016 |
| ANU Bankole Ltd | London | 2020 |
| ANU Dimension Limited | Birmingham | 2016 |
| Anubis Label Technology Ltd | Lee-On-The-Solent | 2000 |
| Anujas Bakehouse Ltd | Harrow | 2020 |
| Anuka Jewellery Limited | Chester | 2023 |
| Anukii Limited | London | 2022 |
| Anuoluwa Afro-Caribbean Foods and General Store Ltd | Dover | 2025 |
| Anuragfoodstory Ltd | Basildon | 2023 |
| Anuvaayum Ltd | Reigate | 2018 |
| ANV Trading Ltd | Aberdeen | 2025 |
| Anvache Carpentry & Construction Limited | Porth | 2020 |
| Anve Partnership Ltd | Chippenham | 2017 |
| Anve Steel Ltd | London | 2021 |
| Anvesha Ltd | Ashton-Under-Lyne | 2025 |
| Anvic Ltd | Glasgow | 2026 |
| Anvic Precision Engineering Limited | Swaffham | 1999 |
| Anvic Silver Limited | Birmingham West Midlands | 2003 |
| Anvil & Advisory Ltd | London | 2025 |
| Anvil & IVY Ltd | Walsall | 2026 |
| Anvil Alloys Limited | Walsall | 2017 |
| Anvil Art Engineering Limited | Isle Of Islay | 2013 |
| Anvil Coffee Limited | Farnham | 2017 |
| Anvil Creative Marketing Ltd | Manchester | 2020 |
| Anvil Design & Fabrication Limited | St. Neots | 2017 |
| Anvil Engineering (Norfolk) Limited | King'S Lynn | 2004 |
| Anvil Fabrications (Stafford) Limited | Stafford | 2008 |
| Anvil Fabrications Limited | Sheffield | 2003 |
| Anvil Gates and Fencing Ltd | Manchester | 2023 |
| Anvil Hypersonics Ltd | London | 2024 |
| Anvil Industry Ltd | London | 2011 |
| Anvil Ironcraft Ltd | Birmingham | 2021 |
| Anvil Locksmiths Limited | Glasgow | 1995 |
| Anvil Manufacturing Limited | London | 2025 |
| Anvil Masters Limited | Hyde | 2014 |
| Anvil Metal Fabrications (Glasgow) Limited | Glasgow | 1979 |
| Anvil Metalworks Limited | Farley Hill | 2004 |
| Anvil Security Doors Ltd | Coalisland | 2024 |
| Anvil SFX Ltd | Norwich | 2024 |
| Anvil Steels (Sandwell) Limited | West Bromwich | 1986 |
| Anvil Traction Limited | Wellingborough | 2014 |
| Anville Instruments Limited | Rotherham, | 1990 |
| Anville Sensors Ltd | Fleet | 2001 |
| Anvilmarts Limited | Exeter | 1991 |
| Anwick Forge Ltd | Sleaford | 2017 |
| ANY Fish Limited | Hampshire | 2001 |
| ANY Maintenance Ltd | Totton | 2014 |
| ANY Other Bakes Ltd | London | 2026 |
| ANY Print Ltd | Iver | 2024 |
| ANY Steel Fabrications Limited | Princes Risborough | 2008 |
| ANY Type Screws & Fixings Ltd | Birmingham | 2023 |
| Anya Anwu Ltd | London | 2026 |
| Anya FS Ltd | Cleckheaton | 2023 |
| Anya Jane Magee Costume Ltd | London | 2023 |
| Anya Morris Limited | Lytham | 2019 |
| Anyanwu Energy Limited | London | 2025 |
| Anybody CAN Repair Phones Ltd | Derby | 2019 |
| Anycases Ltd | Kington | 2023 |
| Anycolour Coatings Limited | Cheltenham | 2011 |
| Anyelectronics Ltd | Cardiff | 2025 |