| AMN Garage Services and Equipment Limited | Huntingdon | 2002 |
| AMN Manufacturing Ltd | Glasgow | 2018 |
| Amnack Limited | Doncaster | 1996 |
| Amnesia Screwball Ltd | London | 2013 |
| Amnigem Limited | London | 2025 |
| Amniomimesis Biotechnologies Ltd | Crowthorne | 2026 |
| Amnitec Limited | Mid Glamorgan | 1957 |
| AMO (Scotland) Limited | Dundee | 2001 |
| AMO ESI Ltd | Birmingham | 2025 |
| AMO Security (Scotland) Ltd | Dundee | 2021 |
| AMO Security Roller Systems Limited | Heckmondwike | 1995 |
| AMO Special Cables Limited | Leigh | 2023 |
| AMO Tea Company Limited | Near Sevenoaks | 1913 |
| AMO United Kingdom Limited | Wokingham | 2002 |
| Amobox Ltd | Colchester | 2019 |
| Amochy Group Ltd. | Beckenham | 2020 |
| Amodus Bespoke Limited | London | 2014 |
| Amodus Timber Windows and Doors Limited | London | 2013 |
| Amogha Foods Ltd | Epsom | 2025 |
| Amoha Jewellers Ltd | Perth | 2024 |
| Amokabel Flexishield Ltd | Mansfield | 2003 |
| Amoke Skincare Limited | Dagenham | 2020 |
| Amol Enterprises Ltd | Stockport | 2017 |
| Amoli Oils Ltd | Barnet | 2025 |
| Amon Software Ltd | Cardiff | 2022 |
| Amonars 25 Ltd | Birmingham | 2025 |
| Among the Trees Ltd | Todmorden | 2021 |
| Amoorengineering Limited | Darlington | 2017 |
| Amor Blinds Ltd | Exmouth | 2015 |
| Amor Candles Ltd | Ormskirk | 2024 |
| Amor ET Psyche Ltd | Hindhead | 2015 |
| Amor Fati Coffee Ltd | St Albans | 2025 |
| Amor Food and Beverages Holdings Limited | Windsor | 2018 |
| Amor Lingerie Limited | Basildon | 2009 |
| Amor Proprio Jewellery Ltd | London | 2026 |
| Amor Studio Ltd | London | 2025 |
| Amora Blinds Limited | Bradford | 2013 |
| Amora Collective Ltd | Orpington | 2025 |
| Amora Dior Ltd | Ruislip, | 2025 |
| Amora Linen Services Limited | Birmingham | 2013 |
| Amorabilia Ltd | London | 2021 |
| Amore Bakery Limited | Milton Keynes | 2011 |
| Amore Cakes Co. Ltd | Slough | 2025 |
| Amore Coffee Services Ltd | London | 2017 |
| Amore Desserts Ltd | Slough | 2020 |
| Amore Facilities Management Limited | Rochester | 2024 |
| Amore Limited | Barnet | 1999 |
| Amore Trading Ltd | Birmingham | 2021 |
| Amorecco Limited | Poole | 2024 |
| Amorel London Ltd | Hounslow | 2025 |
| Amoressi Ltd | Northampton | 2019 |
| Amorey Ltd | London | 2023 |
| Amorphous Sounds Ltd | London | 2021 |
| Amorphous Technologies and Engineering Ltd | Feltham | 2024 |
| Amorphous Technologies Limited | Dereham | 2019 |
| Amorra Ltd | St. Albans | 2025 |
| Amos Electrical Ltd | Manningtree | 2015 |
| Amos Food (UK) Ltd. | Beckenham | 2024 |
| Amos Morgan Consulting Limited | Peterborough | 2002 |
| Amos Swift & Company,Limited | Cleveland | 1926 |
| Amot UK Holdings Limited | Birmingham | 1990 |
| Amotio Health Limited | Cwmbran | 2025 |
| Amotio Ltd | Torfaen | 2024 |
| Amotion.Ldn Limited | London | 2025 |
| Amoudi Pet Food Ltd | Dagenham | 2025 |
| Amour Clothing Ltd | Leicester | 2019 |
| AMP (GB) Limited | Small Dole | 1998 |
| AMP Advance Composites Ltd | Cambridge | 2019 |
| AMP Aircraft Engineering Limited | Glossop | 2019 |
| AMP Biomass (Assetco 1) Limited | London | 2022 |
| AMP Electrical Installation & Inspection & Testing Ltd | Birmingham | 2010 |
| AMP Electrical Installations Ltd | Colchester | 2013 |
| AMP Electrical Mechanical Services Limited | Bolton | 1998 |
| AMP Electrical Testing Ltd | Barnsley | 2016 |
| AMP Groundcare Machinery Services Limited | Hailsham | 2011 |
| AMP Heat (NET Zero 3) Limited | London | 2022 |
| AMP Joinery Limited | Hornchurch | 2021 |
| AMP Loudspeakers Ltd | Ruislip, | 2026 |
| AMP Maker Limited | Cambridgeshire | 2011 |
| AMP Masonry Limited | Wellingborough | 2023 |
| AMP Power Protection Limited | Milton Keynes | 2020 |
| AMP Security Ltd | Southampton | 2006 |
| AMP Urban EV Ltd | Kingsbridge | 2008 |
| Amp'D Music School Ltd | Leicester | 2025 |
| Ampacet Distribution UK Limited | Telford | 2013 |
| Ampacet UK Limited | Telford | 2003 |
| Amparo Prosthetics Ltd | High Wycombe | 2021 |
| Ampco Engineering Limited | Ayr | 1990 |
| Ampcrest Limited | London | 2025 |
| Amped UP Ltd | Radstock | 2020 |
| Ampee Engineering Limited | Harrow | 2018 |
| Ampere Electronics Ltd | Slough | 2013 |
| Amperon Ltd | London | 2026 |
| Amperous Ltd | Birmingham | 2018 |
| Ampersand Brew Co Ltd | Diss | 2017 |
| Ampersand Dairy Ltd | Banbury | 2019 |
| Ampersand EPM Limited | Coventry | 2012 |
| Ampersand Forward Ltd | Swindon | 2025 |
| Ampersand LDN Limited | Market Harborough | 2018 |
| Ampetronic Limited | Newark | 1987 |