| AMY Aghomi Limited | London | 2026 |
| AMY Automotive Limited | Cockermouth | 2011 |
| AMY Christie Ltd. | Solihull | 2006 |
| AMY Collins Ltd | London | 2017 |
| AMY Eira Jewellery Ltd | Paignton | 2022 |
| AMY Jennifer Jewellery Limited | Chester | 2024 |
| AMY KIN Company Ltd | London | 2025 |
| AMY Russell Taylor Jewellery Limited | New Milton | 2021 |
| AMY Thomson Limited | Cambridge | 2020 |
| Amy's Cakes Ltd | Wallasey | 2012 |
| Amy's Kitchen UK Limited | London | 2009 |
| Amyco Industrial Doors Ltd. | Bordesley Green | 1983 |
| Amygdala Home Ltd | St. Leonards-On-Sea | 2021 |
| Amylyx Pharmaceuticals UK Limited | London | 2023 |
| Amynd Ltd | London | 2026 |
| Amytech (UK) Limited | West Sussex | 2007 |
| Amytis Ltd | Edinburgh | 2021 |
| Amy’S Bakehouse Limited | Frogmore | 2022 |
| AMZ ( UK) Ltd | Birmingham | 2008 |
| AMZ Services Ltd | Cambridge | 2018 |
| AMZ Trend Ltd | Lincoln | 2017 |
| AMZ Vehicles (UK) Limited | Ryde | 2017 |
| Amélioré Ltd | London | 2023 |
| AN 11 Limited | Croydon | 2024 |
| AN Artful Gardener Limited | Manchester | 2020 |
| AN Buthal Community Interest Company | Newry | 2023 |
| AN Cala Heating,Plumbing and GAS Services Limited | Kilmarnock | 2017 |
| AN Carn Distillery Ltd | Magherafelt | 2021 |
| AN Designer Ltd | Rochdale | 2017 |
| AN Electrical Solutions Ltd. | Sidcup | 2020 |
| AN Even Playing Field Ltd | London | 2025 |
| AN Fabrications Limited | Stowmarket | 2014 |
| AN Gael Whiskey Ltd | Armagh | 2022 |
| AN Invisible Republic Ltd | Haywards Heath | 2007 |
| AN Kitchens and Bedrooms of Bolton Ltd | Bolton | 2022 |
| AN MOR Ltd | Penryn | 2025 |
| AN Motorsport Limited | Hove | 2006 |
| AN Ocean of Ideas Ltd | London | 2020 |
| AN Ordain Limited | Glasgow | 2016 |
| AN Underdog Limited | London | 2020 |
| AN Viet Foods Ltd | London | 2025 |
| An'Du Care Limited | London | 2019 |
| An-Tec Logistic Limited | Bridgend | 2023 |
| An-Vm Services Ltd | Dagenham | 2020 |
| ANA Advertisement Ltd | Uxbridge | 2026 |
| ANA Bela 'S Alterations & Repairs Ltd | London | 2021 |
| ANA Cars Sales Limited | Wokingham | 2024 |
| ANA Dahlia Ltd | London | 2025 |
| ANA DE Costa Fine Jewellery Ltd | Manningtree | 2010 |
| ANA DE SA Ltd | Feltham | 2026 |
| ANA DEL RIO Ltd | London | 2024 |
| ANA IVA Limited | Cardiff | 2016 |
| ANA Maria Frunza Ltd | London | 2026 |
| ANA Maria Motorsport Ltd | London | 2025 |
| ANA Maria Serban Ltd | Yeovil | 2013 |
| ANA Marine Limited | Gateshead | 1999 |
| ANA Nevi Limited | London | 2021 |
| ANA Norvent Limited | Gateshead | 2008 |
| ANA Poultry Services Ltd | Birmingham | 2010 |
| Ana's Bake Studio Ltd | Slough | 2024 |
| Ana's Farmacy Ltd | Llandysul | 2020 |
| Anaar Kali Fabrics Ltd | Walthamstow | 2013 |
| Anaashe Ltd | Corby | 2021 |
| Anaba Ltd | Cardiff | 2025 |
| Anacarda Limited | Elland | 2012 |
| Anaconda Equipment International Ltd | Ardboe | 2005 |
| Anaconda Global Holdings Ltd | Dungannon | 2012 |
| Anacre Cakes & Bakes Ltd | Ashbourne | 2024 |
| Anadolu Gold JSC Limited | London | 2025 |
| Anaesthesia Technology Limited | Leeds | 1992 |
| Anaesthetic Medical Systems Ltd | Wilmslow | 1999 |
| Anagach Arts Ltd. | Lairg | 2025 |
| Anagas Limited | Shrewsbury | 2002 |
| Anagen Innovation Medicine Ltd | Bristol | 2024 |
| Anagi Embroidery & Print Limited | Basildon | 2026 |
| Anagi Embroidery Limited | Basildon | 2016 |
| Anagram Upholstery Services Ltd | Kington | 2013 |
| Anahar Limited | Irvine | 2026 |
| Anai Rituals Ltd | London | 2026 |
| Anaiis Ltd | London | 2021 |
| Anais and Limited | Leeds | 2025 |
| Anaisy Cosmetics Ltd | Peterborough | 2026 |
| Anajam Holdings Limited | Leicester | 2016 |
| Analog Audio Limited | Kenny Hill | 2016 |
| Analog Developments Limited | Bristol | 2006 |
| Analog Devices Limited | Hayes | 1967 |
| Analog Implant Laboratory Limited | Macclesfield | 2000 |
| Analog Labs Ltd | Hailsham | 2022 |
| Analog Motion Ltd | Burnley | 2017 |
| Analogic UK II Ltd | Maidstone | 2023 |
| Analogue Group Limited | London | 2020 |
| Analogue Insight Ltd | London | 2024 |
| Analox Instruments Limited | Stourbridge | 2015 |
| Analox Limited | Royston | 1994 |
| Analysis Logic Limited | Aberdeen | 2014 |
| Analytical Components Limited | Hailsham | 2015 |
| Analytical Engineering Limited | Oxfordshire | 1993 |
| Analytical Instrument Tube Systems Ltd | Telford | 2012 |
| Analytical Measurements Limited | Ashford | 1998 |
| Analytical Sciences Limited | London | 1987 |