| Amerex Services Limited | Llandudno | 1979 |
| American Autoflow Limited | Diss | 2005 |
| American Beverage Marketers Limited | London | 2004 |
| American Laboratory Products in Europe Limited | Bedford | 1995 |
| American Line Limited | Surrey | 1996 |
| American Muffin Co. Ltd | London | 1995 |
| American Oak Limited | Cardiff | 2024 |
| American PAN International Holdings Limited | Chandlers Ford | 2017 |
| American PAN UK Ltd | Manchester | 1993 |
| American Retro Caravans Limited | Chippenham | 2009 |
| American RV Centre Limited | Northampton | 2014 |
| American Shutters Distribution Ltd | Petersfield | 2011 |
| American Smith Home Appliances Co., Ltd | Cardiff | 2022 |
| American Techno Controls Ltd | Cheadle | 2022 |
| American Tobacco Leaf Limited | London | 2001 |
| Americano Coffee Ltd | Billingham | 2025 |
| Americhem Europe Limited | London | 1971 |
| Americom 24 Limited | Nottingham | 2020 |
| Amerina Rose Ltd. | Cairndow | 2015 |
| Amerinza Fashion Limited | Nelson | 2025 |
| Amerisolar Energy UK and EU Ltd | Beckenham | 2024 |
| Amerisweet Co., Limited | Beckenham | 2024 |
| Ameritins UK Limited | Stanmore | 2019 |
| Amersham Artisan Limited | Kessingland | 2025 |
| Amerson Limited | Weymouth | 1954 |
| Amertousi Ltd | London | 2020 |
| Ames Goldsmith U.K. Limited | Liverpool | 2006 |
| Amesa East Ltd | London | 2025 |
| Amesbury Locks Limited | Wokingham | 2012 |
| Amesstries Ltd | Poole | 2025 |
| Ametek (GB) Limited | Leicester | 1990 |
| Ametek Airtechnology Group Limited | Leicester | 1951 |
| Amethyst Artificery Limited | Swansea | 2025 |
| Amethyst Contracts Limited | Coventry | 2003 |
| Amethyst Designs Limited | Cambridge | 1981 |
| Ametrine Skin Ltd | London | 2020 |
| Amey Plastics Limited | Aldershot | 2010 |
| Amez Trade Ltd | Manchester | 2020 |
| AMF Bakery Systems (UK) Limited | Leeds | 2016 |
| AMF Engineering Limited | Andover | 2009 |
| AMF Limited | Exeter | 2004 |
| AMF Precision Engineering Limited | Wirral | 2008 |
| AMF Print Ltd | London | 2026 |
| AMF Services (Bedford) Limited | Bedford | 2014 |
| Amfab Limited | Edinburgh | 2018 |
| Amfabs (West Midlands) Limited | Dudley | 2011 |
| Amfax Limited | Blandford Forum | 1986 |
| Amfed Limited | Gloucester | 2024 |
| Amfortas Limited | Worcester | 2012 |
| Amft UK, Ltd. | London | 2026 |
| AMG Actuators Limited | Chichester | 2002 |
| AMG Alpoco UK Limited | Rotherham | 1969 |
| AMG Aluminum UK Limited | Rotherham | 2012 |
| AMG Carpentry (SE) Ltd. | West Malling | 2015 |
| AMG Chrome Limited | Rotherham | 1938 |
| AMG Detailing Ltd | Oldham | 2022 |
| AMG Engineering Supplies Ltd | Batley | 2012 |
| AMG Fabrications (NE) Limited | Gateshead | 2021 |
| AMG Fabrications Limited | Nottingham | 2015 |
| AMG Facilities Management Ltd | Maidstone | 2016 |
| AMG Fire Solutions Limited | Shrewsbury | 2017 |
| AMG Golf Limited | Cupar | 2019 |
| AMG Heating & Plumbing Limited | Tamworth | 2011 |
| AMG International Ltd | London | 2025 |
| AMG Print Solutions Limited | Kettering | 2025 |
| AMG Resources Limited | Llanelli | 1980 |
| AMG Sheet Metal Limited | Scarborough | 2009 |
| AMG Slush Ltd | London | 2023 |
| AMG Smart Limited | Corby | 2015 |
| AMG Systems Limited | Biggleswade | 1993 |
| AMG Weldall Ltd | Crumlin | 2025 |
| Amglo Electrical Services Limited | Sidmouth | 2013 |
| AMH Components Ltd | Cambridge | 2021 |
| AMH Engineering N.I. Ltd | Belfast | 2025 |
| AMH Servicing Limited | Otley | 2018 |
| Amhurst Industrial Gases Ltd | Birmingham | 2025 |
| AMI Access Solutions Limited | Dunmow | 2023 |
| AMI Digital Limited | Chessington | 2007 |
| AMI Elisah Bridal Ltd | Tunbridge Wells | 2024 |
| AMI Garage Ltd | London | 2025 |
| AMI Homeware Ltd | Chigwell | 2022 |
| AMI Medical Limited | Nottingham | 2009 |
| AMI Metals UK Limited | Ellesmere Port | 2012 |
| AMI Technology Consulting Ltd | London | 2023 |
| Amian J Metal Polishers Ltd | Stoke On Trent | 2003 |
| Amichaluk Ltd | Corby | 2026 |
| Amico Electrical Contracting Limited | Nottingham | 2025 |
| Amico Polishing Ltd | Guildford | 2011 |
| Amie Wolfenden Limited | Bradford | 2018 |
| Amiedo Ltd | Livingston | 2025 |
| Amies Alterations Ltd | Wakefield | 2025 |
| Amieur & Zgaljardic Tailors Ltd | London | 2024 |
| Amiga Group Emea Limited | London | 2021 |
| Amigakit Ltd | Cardiff | 2019 |
| Amigo Chem Limited | Peterborough | 2009 |
| Amigo Electrical Limited | Bristol | 2016 |
| Amigo Golf Ltd | Derby | 2025 |
| Amigos Stone Ltd | Wembley | 2023 |
| Amijis Candy’S Ltd | Preston | 2026 |
| Amila Autos Limited | Sidcup | 2025 |