| Ampney Crucis Cricket Club Ltd | Cirencester | 2026 |
| Ampol Ltd | Tugby | 2017 |
| Ampon Services Ltd | London | 2024 |
| Amps Creative Ltd | London | 2017 |
| Amps Rail Limited | Chesham | 2007 |
| Ampthill & District Community Rugby Club Limited | Ampthill | 1959 |
| Ampthill Music CIC | Bedford | 2024 |
| Ampthill Town Football Club Limited | Ampthill | 2025 |
| AMR Aero Ltd | London | 2016 |
| AMR GP Limited | Towcester | 2018 |
| AMR Quest Limited | Hailsham | 2022 |
| Amran Ventures Ltd | Ilford | 2025 |
| Amreb Ltd | Leyland | 2020 |
| Amrita Jhaveri Limited | London | 2014 |
| Amrss Limited | Elgin | 2019 |
| AMS Administration Ltd | Linby | 2014 |
| AMS Design Studio Limited | London | 2011 |
| AMS Gym Ltd | Billingshurst | 2025 |
| AMS Motorsport Group Ltd | Doncaster | 2025 |
| AMS Music Group Limited | Shifnal | 2018 |
| AMS Personal Trainer Ltd | Hertfordshire | 2013 |
| Amsara Ltd | Birmingham | 2021 |
| AMT Entertainment Ltd | Peterborough | 2019 |
| AMT Youth Programme CIC | Staple | 2020 |
| Amtp Ltd | London | 2024 |
| Amtp Music Ltd | Wrexham | 2025 |
| AMTW23 Ltd | Leicester | 2026 |
| Amuma Yoga Limited | Bedworth | 2025 |
| Amunergy UK Ltd | Leeds | 2025 |
| Amur Storytelling and Consulting Ltd | London | 2024 |
| Amuse 2016 Ltd. | Halesowen | 2016 |
| Amuse East London Limited | Loughton | 2011 |
| Amuse the Butcher Limited | Brighton | 2017 |
| Amuse-Buge Limited | Wirral | 2025 |
| Amusemax Ltd | London | 2025 |
| Amusement Caterers (Sheffield) Limited | Sheffield | 1964 |
| Amusement Machine Hire (Scotland) Limited | Glasgow | 2016 |
| Amusement Ride Manufacturers Limited | Reigate | 2009 |
| Amusements Limited | Bristol | 1981 |
| Amusetime 2 Limited | London | 2023 |
| Amusetime Limited | London | 2015 |
| AMUST4MUSIC Limited | Derby | 2000 |
| AMV Live Events Limited | Stocksfield | 2012 |
| AMV Live Music Limited | Stocksfield | 2010 |
| AMV Live Venues Limited | Stocksfield | 2012 |
| AMW Consultancy & Training Limited | Sutton Coldfield | 2014 |
| AMW Productions Limited | Welshpool | 2009 |
| AMX Personal Training Limited | Sheffield | 2021 |
| AMY Addison Limited | Harrogate | 2021 |
| AMY Angold Limited | Chesham | 2017 |
| AMY Bastin Dance Limited | Cheltenham | 2025 |
| AMY Beager Limited | Chelmsford | 2022 |
| AMY Billington Dance Academy Limited | Leicester | 2012 |
| AMY Boulden Golf Limited | Lichfield | 2015 |
| AMY Davin Dance Academy Limited | Manchester | 2019 |
| AMY DEY Personal Training Ltd | Dundee | 2021 |
| AMY Dury Ltd | Hove | 2025 |
| AMY FLO Face Painting Ltd | Chesterfield | 2025 |
| AMY Friend SET Design Limited | Sheffield | 2019 |
| AMY Gallagher Coaching Ltd | Hoddesdon | 2015 |
| AMY Gledhill Limited | London | 2023 |
| AMY Goodman Sculptor and Portrait Artist Ltd | Quarley | 2014 |
| AMY Guppy Academy Ltd | Penarth | 2026 |
| AMY Harrison Studios Ltd | Richmond | 2023 |
| AMY Hubbard Casting Limited | Wallington | 2014 |
| AMY Inks Ltd | Romford | 2019 |
| AMY International Artists Limited | Northampton | 1994 |
| AMY Jackson Ltd | Weston-Super-Mare | 2010 |
| AMY Jackson Studio Ltd | London | 2012 |
| AMY James Home Limited | Northwood, | 2014 |
| AMY Johnson Arts Trust | Hull | 2014 |
| AMY Judd Art Limited | Morden | 2014 |
| AMY King Creative Limited | Manchester | 2015 |
| AMY L Limited | South Croydon | 2022 |
| AMY Lennox Productions Limited | Droitwich | 2015 |
| AMY Louise Communications Ltd | Bristol | 2024 |
| AMY Macdonald Ltd. | Edinburgh | 2006 |
| AMY Macdonald Touring Ltd. | Edinburgh | 2007 |
| AMY Magee Fine Art Ltd | Leominster | 2021 |
| AMY Mansfield Hair and Makeup Ltd | London | 2023 |
| AMY Morrow Fitness Ltd | Dalkeith | 2023 |
| AMY Murphy Racing Ltd. | Newmarket | 2016 |
| AMY NIC Ltd | Manchester | 2025 |
| AMY Originals Studio Ltd | London | 2021 |
| AMY Pounder Personal Training Ltd | Middlesbrough | 2020 |
| AMY Rogerson Fitness Ltd | Barrow-In-Furness | 2019 |
| AMY Simpson Fitness Ltd | Middlesbrough | 2017 |
| AMY Sutton Ltd | Wymondham | 2015 |
| AMY Swann Limited | Chester | 2025 |
| AMY SZE Productions Ltd | London | 2023 |
| AMY Tapper Limited | Weymouth | 2014 |
| AMY Tetchner Ltd | Leigh-On-Sea | 2019 |
| AMY Wadge Limited | London | 2005 |
| AMY Winehouse Foundation Music Ltd | London | 2015 |
| AMY Wright Fitness Ltd | Burscough | 2026 |
| Amy's Acro Ltd | Huntingdon | 2015 |
| Amy.Ptfitness Limited | Romford | 2022 |
| Amyask Limited | London | 2002 |
| Amybeth Ltd | London | 2021 |
| Amybrand Limited | Brimstage Road | 2023 |