| Amber Consultancy Limited | Edgware | 2022 |
| Amber Core Maintenance Experts Ltd | Manchester | 2026 |
| Amber Decorating Limited | Ilford | 2003 |
| Amber Design (London) Limited | Halstead | 2009 |
| Amber First AID Training Services Ltd | Ripley | 2016 |
| Amber Fluid Ltd | Harrogate | 2012 |
| Amber Forest Investment Partners Ltd | Manchester | 2026 |
| Amber Heating Solutions Limited | Beccles | 2015 |
| Amber Hire Co. Ltd | Belper | 1997 |
| Amber Jane Limited | Reading | 2008 |
| Amber Lift (Sapphire) Investments Limited | London | 2009 |
| Amber Maintenance Ltd | Kingston Upon Thames | 2015 |
| Amber Marine Technical Service Co., Ltd | London | 2022 |
| Amber MIX Limited | Belper | 2024 |
| Amber Performance Limited | Buckinghamshire | 2007 |
| Amber Real Property Limited | St Albans | 2013 |
| Amber Roofing Services Limited | Ilford | 2006 |
| Amber Scaffolding (Holdings) Limited | Chichester | 2018 |
| Amber Taxis Limited | Loughborough | 2016 |
| Amber US Investments Limited | London | 2009 |
| Amber Wave Maintenance Solutions Ltd | Manchester | 2026 |
| Amberdate Limited | | 1991 |
| Amberdesigns Limited | Winchester | 2000 |
| Amberhawk Limited | Leeds | 2011 |
| Amberley Alternative Assets Limited | Chelmsford | 2007 |
| Amberley House Care Limited | Addlestone | 2014 |
| Ambernectar Ltd | Surrey | 2013 |
| Ambershire Holdings Limited | Dunmow | 2025 |
| Amberwood Home Improvements Limited | Aldermaston | 2008 |
| Ambi Link College Ltd | Bristol | 2013 |
| Ambi-Heat Industrial & Commercial Heating Ltd | Sheffield | 2022 |
| Ambient Computer Services Limited | London | 2020 |
| Ambient Technology Ltd | Leeds | 2013 |
| Ambika Holdings Limited | Oadby | 2022 |
| Ambilicam Consulting Limited | Coventry | 2014 |
| Ambipar Howells Consultancy Limited | London | 2013 |
| Ambition Ceramics Co., Ltd | Beckenham | 2020 |
| Ambition Property Ltd | Lineside, Coalisland | 2005 |
| Ambition Squad Ltd | London | 2024 |
| Ambizz Limited | London | 2025 |
| Amblemanor Limited | Wolverhampton | 1985 |
| Ambler & Co Ltd. | St. Ives | 2014 |
| Ambleside Motor Launch Co. Ltd | Bowness-On-Windermere | 2013 |
| Amblewater Ltd | Newcastle Upon Tyne | 2017 |
| Ambridge Group Limited | Harrogate | 2026 |
| Ambridge Thermoplastics Limited | Newcastle | 2014 |
| Ambro Wilson Limited | Derby | 2021 |
| Ambrosius Limited | Holmfirth | 2010 |
| Ambstal Consultancy Ltd | Eastbourne | 2018 |
| Ambuild Limited | Eastbourne | 2007 |
| Ambusol Limited | London | 2022 |
| AMC Group Limited | London | 2000 |
| Amcc Distributions Ltd | London | 2016 |
| Amcey Energy Ltd | Milton Keynes | 2020 |
| Amcl (2013) Limited | Epsom | 2013 |
| Amco ( Kent ) Limited | Handsworth | 1995 |
| Amco Care Limited | Ruislip | 2019 |
| Amco Electrical Services Ltd | Bushey | 2021 |
| Amco Giffen Limited | Leeds | 2008 |
| Amco Logistics Limited | Nottingham | 2013 |
| Amcopep | Edinburgh | 1987 |
| Amcor Flexibles Cramlington Limited | Bristol | 1989 |
| Amcows 66 Limited | Edinburgh | 2014 |
| Amcows 99 Limited | Edinburgh | 2012 |
| Amcows Twentysix Limited | Currie | 1998 |
| Amcx Enterprises Limited | London | 2014 |
| AMD Logistics Ltd | Northampton | 2014 |
| AMD Technik Ltd | Walton-On-Thames | 2010 |
| Amdani Limited | Haverfordwest | 2025 |
| Amdega Limited | Norwich | 2024 |
| AME (NI) Limited | Carrickfergus | 2007 |
| AME Plumbing Limited | Walthamstow | 2013 |
| Amec (WSL) Limited | Knutsford | 1952 |
| Amec BKW Limited | Knutsford | 1920 |
| Amec Capital Projects Limited | Knutsford | 1993 |
| Amec Civil Engineering Limited | Knutsford | 1976 |
| Amec Engineering Limited | Knutsford | 1962 |
| Amec Process and Energy Limited | Knutsford | 1986 |
| Ameco Ltd. | London | 2017 |
| Ameconti Impex Ltd. | | 2002 |
| Ameer Plant Products (UK) Co., Ltd | Manchester | 2022 |
| Ameida CNC Technology Co., Ltd | Beckenham | 2017 |
| AMEL1A Limited | Harrogate | 2020 |
| Amelia Court (Sandown) Management Company Limited | Newport | 2009 |
| Amelia Daniels Ltd | Newton Abbot | 2019 |
| Amelia Grainger Enterprises Ltd | Pembroke Dock | 1995 |
| Amelia Investments (1869) Limited | London | 1998 |
| Amelia Red Limited | Leytonstone | 2013 |
| Amelie Roseview Ltd | London | 2025 |
| Ameliorate Care Ltd | Christchurch | 2025 |
| Ameliorate Limited | Wymondham | 2010 |
| Ameliorate Skincare Limited | Altrincham | 1997 |
| Amenities Properties Ltd | London | 2021 |
| Amenity Property (Britannia Mews Telford) Limited | London | 2014 |
| Amenity Property (Cally Blue Fields Stockton) Limited | London | 2016 |
| Amenity Property (Entech House Woolmer Green) Limited | London | 2019 |
| Amenity Property (Himley View Dudley) Limited | London | 2013 |
| Amenity Property (Hugesleah Place Highley) Limited | London | 2015 |
| Amenity Property (Levett Grange Rugeley) Limited | London | 2011 |
| Amenity Property (Lockside Walk Brierley Hill) Limited | London | 2014 |