| Alyk Design & Print Ltd | Bolton | 2026 |
| Alymain Enterprises Limited | Clacton-On-Sea | 2024 |
| Alyn Stone Limited | Wrexham Borough | 2005 |
| Alyom Altali for Press & Publication Ltd | West Drayton | 2025 |
| Alyssa Fashions Limited | Seaham | 2025 |
| Alyssa Marie Groeneveld Ltd | London | 2022 |
| Alyssa Smith Jewellery Limited | Hitchin | 2012 |
| Alysys Technology Services Ltd | London | 2026 |
| ALZ Care Limited | Epsom | 2021 |
| Alzariabotanicals Ltd | London | 2024 |
| Alzchem UK Limited | Coventry | 2022 |
| Alzin Engineering Limited | Elland | 1973 |
| Alzscents Essential Aromas Ltd | Leeds | 2021 |
| AM & Sons Services Limited | Gloucester | 2016 |
| AM 2 PM Catering Engineers Ltd. | Lewes | 2013 |
| AM Access Repairs Ltd | Blaydon-On-Tyne | 2025 |
| AM Advanced Engineering Ltd | Loughborough | 2024 |
| AM Agri Limited | Forfar | 2021 |
| AM Air Limited | Warrington | 2026 |
| AM Blinds Ltd | Peterborough | 2025 |
| AM Building & Developments Ltd | Barnsley | 2019 |
| AM Candles Ltd | London | 2026 |
| AM Carpenters Ltd | Swindon | 2024 |
| AM Digital Limited | Wigan | 2005 |
| AM Distilling Ltd | Luton | 2018 |
| AM Dreams Ltd | Farnborough | 2025 |
| AM E-Tech Limited | Cardiff | 2013 |
| AM Electrics (Renewables) Limited | Kettering | 2014 |
| AM Elite Accessories Limited | London | 2025 |
| AM Extractions & Canopy Ventilation Ltd | Birmingham | 2025 |
| AM Fabrication Service Ltd | Belper | 2018 |
| AM Fabricators Ltd | Flint | 2021 |
| AM Finflow UK Ltd | Crawley | 2018 |
| AM Fleet Maintenance Ltd | Ilkley | 2026 |
| AM Food System Ltd | London | 2026 |
| AM Fresh Food & Drink (UK) Limited | Skelmersdale | 2017 |
| AM Freshly Squeezed Limited | Skelmersdale | 2018 |
| AM General Trade Limited | Manchester | 2023 |
| AM Heating and Plumbing Ltd | Rochdale | 2024 |
| AM Heating Services Limited | Cambridge | 2015 |
| AM Industrial (UK) Limited | Farnborough | 2007 |
| AM Industrials Group Ltd | Milton Keynes | 2025 |
| AM Joinery (U.K) Ltd | Bradford | 2022 |
| AM Joinery Ltd | Rugby | 2023 |
| AM Kitchen and Bedroom (Birmingham) Ltd | Birmingham | 2022 |
| AM Kitchens Ltd | Leicester | 2016 |
| AM Kreative Media Ltd | Market Deeping | 2007 |
| AM Labs Ltd | Blackpool | 2025 |
| AM Machine Tools and Servicing Ltd | Wimborne | 2024 |
| AM Machinery Services Ltd | Salford | 2025 |
| AM Machining Ltd | Southampton | 2016 |
| AM Marine Limited | London | 2017 |
| AM Medicaid Ltd | Wrexham | 2020 |
| AM Metal Design Limited | London | 2015 |
| AM Midlands Ltd | Birmingham | 2019 |
| AM Move Ltd | Wokingham | 2025 |
| AM Packaging Corporation Limited | Fleetwood | 2009 |
| AM Pipework and Welding Ltd | Dudley | 2015 |
| AM Powders Ltd | Ormskirk | 2022 |
| AM Printers Ltd | Birmingham | 2017 |
| AM Refining Ltd | Birmingham | 2024 |
| AM Refrigeration (Commercial) Ltd | Malton | 2006 |
| AM Seaweed Ltd | Dundee | 2025 |
| AM Services (WY) Ltd | Ossett | 2015 |
| AM Services London Ltd | Watford | 2005 |
| AM Signs & Engraving Ltd | Southampton | 2015 |
| AM Square Group Limited | Coventry | 2023 |
| AM System Limited | Leicestershire | 2003 |
| AM Technical Ltd | Porthcawl | 2023 |
| AM Technology Limited | Stevenage | 2015 |
| AM Textile Engineering Limited | Huddersfield | 2015 |
| AM Trading Enterprises Ltd | Blackburn | 2015 |
| AM Tutor Services Limited | Birmingham | 2006 |
| AM Utility Services Ltd | Wrexham | 2014 |
| AM Wellness Ltd | London | 2022 |
| AM Wood Craft Ltd | Nottingham | 2020 |
| AM YER MAN Pipefitting Limited | Dundee | 2023 |
| Am&Cc Ltd. | Aldershot | 1999 |
| Am&Co Ltd | London | 2021 |
| Am-Pere Battery and Energy Solutions Ltd | Glasgow | 2026 |
| Am-Technical Services Ltd | Larkhall | 2025 |
| Am.Ac Solutions Ltd | London | 2025 |
| Am:Ai Technologies Limited | Leicester | 2024 |
| Am:Pm (UK) Limited | Thirsk | 2013 |
| AMA Artisan Bakery Ltd | Saffron Walden | 2025 |
| AMA Botchey Ltd. | London | 2023 |
| AMA Carpentry Ltd | Ilford | 2026 |
| AMA Compressed Air Specialists Limited | | 2008 |
| AMA Executive Limited | Cheltenham | 2019 |
| AMA Ingredients Limited | Caerphilly | 2023 |
| AMA International Ltd | London | 2025 |
| AMA Labels Limited | High Wycombe | 2001 |
| AMA Realisations Ltd | Leeds | 2017 |
| AMA Signature Ltd | South Croydon | 2024 |
| AMA Switchgear Ltd | Bridgwater | 2022 |
| AMA Tasty Food Ltd | Rochester | 2024 |
| AMA Time Digital Ltd | London | 2021 |
| AMA Wiring Solutions Ltd | Coventry | 2023 |
| Amabel Darby Ltd | Hereford | 2023 |
| Amac Boat Repairs Ltd | Hampton | 2017 |