| Amac Holdings Limited | London | 2018 |
| Amac Records & Manufacturing Ltd | Ashford | 2024 |
| Amaco Refrigeration Ltd | London | 2017 |
| Amada Essex Limited | Kidderminster | 1997 |
| Amada Midlands Limited | Worcestershire | 1997 |
| Amada United Kingdom Limited | Worcestershire | 1972 |
| Amada Weld Tech Limited | Suffolk | 1983 |
| Amadershopno Ltd | London | 2025 |
| Amadeus (Spain) Crop Science Co., Ltd | London | 2024 |
| Amadeus Design Furniture Limited | Milton Keynes | 2002 |
| Amadeus Design Limited | Milton Keynes | 2017 |
| Amadeus Press Limited | Cleckheaton | 1988 |
| Amadoria Limited | West Ealing | 2011 |
| Amaeth Cothi CYF | Llanwrda | 2020 |
| Amaeth Hafod Limited | Llandudno | 2011 |
| Amaf (UK) Ltd | London | 2013 |
| Amafhh Group Limited | Leicester | 2019 |
| Amafhhmas Limited | Barnet | 2017 |
| Amaizonia Ltd | London | 2019 |
| Amakhofi Limited | Leicester | 2020 |
| Amal and Thistle Limited | Glasgow | 2025 |
| Amal Construction and Transport Services Ltd | Hayes | 2025 |
| Amal Jewellers Ltd | Bradford | 2026 |
| Amala Bay Ltd | Sevenoaks | 2020 |
| Amala Sky Limited | Manchester | 2023 |
| Amalfi P.I. Limited | Barnet | 2025 |
| Amalgam Collection Limited | Bristol | 2004 |
| Amalgamated Euro Products UK Ltd | Chorley | 2012 |
| Amalgamated Laboratory Solutions Limited | London | 2017 |
| Amalgamated Lifts Limited | Crayford | 1988 |
| Amalgamated Pump Engineering Ltd. | Oakham | 2018 |
| Amalgamated Signs Limited | Manchester | 1994 |
| Amalipe Ltd | London | 2025 |
| Amalka Ltd | Selby | 2018 |
| Aman Domestics Appliances Ltd | East Ham | 2010 |
| Aman Kitchen & Bedroom Ltd | Romford | 2025 |
| Aman Kitchens and Bedrooms Limited | Hayes | 2018 |
| Aman Metal Spinners Limited | Womanby Street | 1973 |
| Aman Welding and Fabricating Ltd | Aberdare | 2021 |
| Amana Cosmetics Limited | London | 2013 |
| Amana PHOTO4U Limited | London | 2014 |
| Amanah Health Products Limited | London | 2024 |
| Amanah Oils Co Ltd | Nottingham | 2026 |
| Amanah Prime Ltd | Ilford | 2026 |
| Amanda Banham Ltd | Great Chesterford | 2021 |
| Amanda Gaffney Ltd. | Chipping Campden | 2017 |
| Amanda Jane Consultancy Ltd | Bedford | 2022 |
| Amanda Jane of Haslar Ltd | Bexhill On Sea | 2026 |
| Amanda June Jewellery Ltd | Whitchurch | 2024 |
| Amanda Mansell Limited | London | 2016 |
| Amanda Walker Limited | Swansea | 2017 |
| Amanda&Co. Ltd | London | 2021 |
| Amandiegoart Ltd | London | 2021 |
| Amanha Global Co., Ltd | Beckenham | 2024 |
| Amani in the World Limited | London | 2018 |
| Amani Jones Ltd | Cardiff | 2012 |
| Amani Rose Limited | Hayes | 2025 |
| Amania Trading Ltd | Ipswich | 2006 |
| Amann Oxley Holdings Limited | Ashton Under Lyne | 2007 |
| Amann Threads UK Limited | Ashton Under Lyne | 1953 |
| Amano London Limited | London | 2021 |
| Amanstyle Ltd | Bolton | 2020 |
| Amanzada UK Ltd | London | 2025 |
| Amapolas Bakers Ltd | London | 2023 |
| Amar Food Company Limited | London | 2025 |
| Amar Hangers Limited | Willenhall Wolverhampton | 1998 |
| Amar Precision Machine Tools Limited | Hitchin | 2026 |
| Amara Automotive Ltd | Southampton | 2022 |
| Amara Jane UK Limited | Harrogate | 2017 |
| Amarah Blinds & Glass Limited | Tipton | 2016 |
| Amaral Windows Limited | Glasgow | 2026 |
| Amaranthine Beauty Ltd | Glasgow | 2017 |
| Amaranthlabs Ltd | Abingdon | 2024 |
| Amaraya Limited | Shrewsbury | 2024 |
| Amaretto Italian Sweet Ltd | Bristol | 2021 |
| Amari Metals Engineering Group Limited | Wednesbury | 2022 |
| Amari Power Limited | Watford | 2007 |
| Amari Precision Tubes Limited | Wednesbury | 2010 |
| Amari Trading Ltd | Manchester | 2024 |
| Amarin Rubber and Plastics Limited | Bristol | 2003 |
| Amarinth Limited | Woodbridge | 2002 |
| Amario Barking & Dagenham Motors Ltd | Barking | 2026 |
| Amaris Granite & Marble Limited | Bridgend | 2005 |
| Amarka Aluminium Limited | Epping | 2017 |
| Amarok Audio Ltd | Cambridge | 2025 |
| Amaroq Skis Ltd | Mildenhall | 2026 |
| Amarox Limited | Harrow | 2017 |
| Amaryllis Crafts Ltd | London | 2026 |
| Amarzuri Limited | Leeds | 2023 |
| Amasa Ltd | London | 2024 |
| Amathus Shoes Limited | Barking | 2002 |
| Amati Studio Ltd | London | 2020 |
| Amatron Limited | Twickenham | 2019 |
| Amaupholstery Ltd | Bradford | 2021 |
| Amaura Limited | Milton Keynes | 2020 |
| Amavoy Ltd | Bury St. Edmunds | 2025 |
| Amawa Limited | London | 2025 |
| Amaya Coffee Limited | London | 2026 |
| Amaya Sales UK Limited | Havant | 2003 |
| Amayce Limited | Newport | 2024 |