| Amely AI Limited | London | 2025 |
| Amelya Limited | London | 2022 |
| Amelys Ltd | London | 2020 |
| Amem Ltd | London | 2022 |
| Amema Limited | Bristol | 2018 |
| Amemo Limited | Sutton | 2015 |
| Amemori Labs Ltd | London | 2026 |
| Amemory Limited | Edenbridge | 2004 |
| AMEN4TEKNO Ltd | Bristol | 2022 |
| Amendolara Holdings Limited | Bury St. Edmunds | 2022 |
| Ameneh Irankhah's Limited | Sale | 2022 |
| Amenno Ltd | London | 2023 |
| Amenophis Consultancy Services Ltd | Cardiff | 2013 |
| Amentis Studios Limited | London | 2023 |
| Ameo Consulting Ltd | Bristol | 2015 |
| Ameosc Limited | London | 2020 |
| Amer Iqbal Editing Ltd | London | 2024 |
| Amer IT Consulting Ltd | Blackpool | 2017 |
| Amer Khan Trading Limited | Maidenhead | 2015 |
| Amera Consulting Limited | London | 2026 |
| Amerald Consultants Ltd | Cardiff | 2025 |
| Amerci Ltd | London | 2025 |
| Amerco Retail Systems Limited | Hemel Hempstead | 1982 |
| Amercybersec Ltd | Morden | 2020 |
| Amerdale IT Limited | Dunmow | 2011 |
| Amerelia Limited | Milton Keynes | 2021 |
| Amerge Consulting Ltd | Edinburgh | 2015 |
| Ameria Ltd | Cambridge | 2017 |
| America Dom-Management Limited | London | 2024 |
| American Actors UK | Southport | 2014 |
| American Animal Pictures Limited | London | 2015 |
| American Artiste Limited | Peterborough | 2013 |
| American Dreamers Movie Ltd | London | 2021 |
| American FLY Drive Limited | Ilford,Essex | 1985 |
| American Honey Limited | London | 2015 |
| American IT Systems Limited | London | 2024 |
| American Ltd | London | 2018 |
| American Mobile Resources (Worldwide) Limited | Mildenhall | 2015 |
| American News Service Limited | Ely | 1996 |
| American Night Productions Limited | London | 2006 |
| American Quiz Film Limited | London | 2022 |
| American Rocky Limited | London | 2017 |
| American Sports Ltd | Curdridge | 2018 |
| American the Movie Limited | London | 2008 |
| American Well Corporation UK Limited | London | 2017 |
| American Writing Services Ltd | Bury St. Edmunds | 2024 |
| Americaneagle.Com UK Ltd | London | 2020 |
| Americanpost Ltd | Ware | 2022 |
| Americansong Ltd | Fareham | 2025 |
| Americanwinkels Ltd | London | 2021 |
| Americapay Limited | London | 2024 |
| Amerigo AI Ltd | Fareham | 2026 |
| Ameris Intelligence Limited | Potters Bar | 2021 |
| Ameris Limited | Potters Bar | 2002 |
| Amerisourcebergen International Technology Services Limited | Woking | 2021 |
| Amerits Digital Limited | Aylsham | 2014 |
| Amero X Ltd | London | 2026 |
| Amerock Networks Limited | Romford | 2019 |
| Amerqureshi Ltd | Maidenhead | 2017 |
| Amerry Services Ltd. | Reading | 2021 |
| Amersham Aerial FIX Ltd | Aylesbury | 2013 |
| Amersham Publishing Limited | London | 2019 |
| Amersham Websites Limited | Watford | 2009 |
| Amersi Limited | London | 2025 |
| Amersia Limited | London | 2026 |
| Amertechx Limited | London | 2014 |
| Amerwoods Limited | Warrington | 2010 |
| Amery Design Ltd | Congleton | 2023 |
| Amery IT Support Ltd | Telford | 2022 |
| Amery Publishing Ltd | Thatcham | 2025 |
| Ames AI Limited | Teignmouth | 2026 |
| Amesbury Avenue Associates Limited | London | 2025 |
| Amesbury Printing Company Limited | Salisbury | 2000 |
| Amesien Ltd | London | 2023 |
| Amesium Ltd | Glasgow | 2024 |
| Amestris Ltd | London | 2026 |
| Amethyst AGE Art Limited | East Grinstead | 2013 |
| Amethyst Ankh Limited | Newbury | 2022 |
| Amethyst Associates Limited | Brackley | 1991 |
| Amethyst by Stella Ltd | London | 2025 |
| Amethyst Consulting Ltd. | Derby | 2016 |
| Amethyst Deterministic Ltd | Cardiff | 2025 |
| Amethyst Developments Limited | Okehampton | 1994 |
| Amethyst Enterprises Limited | Bewdley | 2001 |
| Amethyst Group Advisory Limited | London | 2024 |
| Amethyst Literary Limited | Newcastle Upon Tyne | 2025 |
| Amethyst Marketing (U.K.) Limited | Lancashire | 1993 |
| Amethyst Networks Ltd | Lichfield | 2015 |
| Amethyst Pixel Ltd | London | 2025 |
| Amethyst Projects Limited | London | 2021 |
| Amethyst Support Services Limited | Brackley | 1995 |
| Amethyst Systems Limited | Bristol | 2008 |
| Amethyst Technologies Limited | Biggar | 2011 |
| Amethyst Television Limited | | 1990 |
| Amethyst Ventures Ltd | Barking | 2019 |
| Ametnes Limited | Cardiff | 2011 |
| Ametrix Ltd | London | 2026 |
| Amets Analytics Ltd. | London | 2016 |
| Ameunier Limited | Warrington | 2020 |
| Ameveo Limited | Altrincham | 2022 |