| Amber TOR Flats Management Limited | Plymouth | 1989 |
| Amber U.P.V.C. Holdings Limited | Solihull | 1995 |
| Amber Valley Council for Voluntary Service | Derbyshire | 2003 |
| Amber Valley Locksmiths Ltd | Alfreton | 2024 |
| Amber Violins Ltd | Stroud | 2011 |
| Amber Wave Sauna Limited | Glasgow | 2026 |
| Amber Woodhouse Equestrian Ltd | Kent | 2024 |
| Ambercare (North West) Ltd | Rochdale | 2009 |
| Amberhair Limited | Sutton Coldfield | 2026 |
| Amberin Ltd | Ongar | 2026 |
| Amberlex Trading Ltd | London | 2017 |
| Amberley Boarding Ltd | Chichester | 2020 |
| Amberley Evenington Estates Limited | Salford | 2025 |
| Amberley Project Management Limited | Blackpool | 1997 |
| Amberpig Ltd | Bristol | 2014 |
| Amberrosecoaching Ltd | Basingstoke | 2024 |
| Ambers Legacy (NE) Limited | Sunderland | 2022 |
| Ambershaw Limited | London | 2025 |
| Ambersradiantskinboutique Limited | Birmingham | 2025 |
| Amberstand Limited | Amersham | 2026 |
| Ambertone Health and Beauty Limited | Taunton | 2012 |
| Amberwood Drive Residents Association Limited | Camberley | 1979 |
| Amberz Limited | Manchester | 2009 |
| Amber’S Aesthetics Limited | Oxford | 2026 |
| Ambgo Limited | Bicester | 2022 |
| Ambhar Limited | Birmingham | 2024 |
| Ambia Care Ltd | London | 2025 |
| Ambia Holdings Ltd | St Albans | 2018 |
| Ambia Renewables Limited | Harpenden | 2024 |
| Ambia Service Ltd | London | 2017 |
| Ambiance Beauty Limited | Hounslow | 2024 |
| Ambiance Greenhill Limited | Rotherham | 2019 |
| Ambiance Hair Limited | Hounslow | 2024 |
| Ambiance London Limited | Harrow | 2021 |
| Ambiance Salons Limited | Stoke-On-Trent | 2016 |
| Ambias Beauty Ltd | London | 2015 |
| Ambience @ Huntscross Ltd | London | 2024 |
| Ambience Aroma Ltd | Hartlepool | 2025 |
| Ambience Beauty Salon Ltd | Southampton | 2013 |
| Ambience Glow Ltd | Leytonstone | 2022 |
| Ambience Hire Limited | Selby | 2007 |
| Ambience Kent Limited | Tonbridge | 2026 |
| Ambience Laser Ltd | South Croydon | 2011 |
| Ambience Limited | Stourbridge | 2003 |
| Ambience Venue Styling North Yorkshire Ltd | Skipton | 2022 |
| Ambience York Ltd | Leeds | 2026 |
| Ambient Construction Limited | Southport | 2018 |
| Ambii Ltd | Cheltenham | 2016 |
| Ambika Omkara Limited | London | 2013 |
| Ambika Security Limited | Epsom | 1988 |
| Ambili Ltd | Woking | 2018 |
| Ambiserve Refrigeration Ltd. | Northamptonshire | 2005 |
| Ambit Moat Limited | London | 2016 |
| Ambit Pharma Limited | Luton | 2025 |
| AMBIT10N Limited | Paisley | 2019 |
| Ambition Events Ltd | Epsom | 2022 |
| Ambition Technology Ltd | Luton | 2012 |
| Ambition Unisex Hair and Beauty Salon Limited | Hillingdon | 2013 |
| Ambitions Fulfilled Limited | Middlesex | 2026 |
| Ambitious Limited | Romford | 2012 |
| Ambitious Lives CIC | West Bromwich | 2022 |
| Ambitumblue Ltd | London | 2017 |
| Amble Development Trust | Morpeth | 1994 |
| Amble Dogs Ltd | Margate | 2022 |
| Amble Roofing Ltd | Whitley Bay | 2008 |
| Amblecoat Hand Car Wash Limited | Rugby | 2018 |
| Amblecote Community Church | Stourbridge | 2009 |
| Amblecote Meadows Residents's Committee Ltd | London | 2025 |
| Amblecote Valeting Centre Ltd | Dudley | 2021 |
| Ambler Accountants Limited | St. Ives | 2008 |
| Ambleside Community Christmas Lights Limited | Ambleside | 2017 |
| Ambleside Sports Association Limited | Windermere | 2011 |
| Amblewood Cattery Ltd | Peterborough | 2022 |
| Amblewood Doggy Daycare Ltd | Peterborough | 2025 |
| Amblewood Kennels Ltd | Peterborough | 2022 |
| Ambmgt Ltd | Guildford | 2016 |
| Ambo Capital | London | 2016 |
| Ambosco Limited | 50 Broadway | 2008 |
| Ambra Aesthetic Clinic Ltd | London | 2021 |
| Ambrasana Limited | Whitchurch | 2021 |
| Ambrave Limited | Slough | 2024 |
| Ambreen London Limited | London | 2018 |
| Ambreen Make-Up Limited | London | 2012 |
| Ambreens Holdings Ltd | London | 2026 |
| Ambril Limited | Basildon | 2026 |
| Ambrona & Sons Limited | Carshalton | 2013 |
| Ambrose Adrian Healthcare Ltd | Slough | 2017 |
| Ambrose and Connor Services Limited | Cardiff | 2018 |
| Ambrose Printing Limited | Bakewell | 2016 |
| Ambs Barbers Ltd | Cardiff | 2025 |
| Ambsthetics Ltd | Tadworth | 2023 |
| Ambulance Association UK Limited | Manchester | 2017 |
| Amburgh Investments Limited | Bedford | 2023 |
| Ambus Business Services Ltd | Burnley | 2007 |
| Ambush Sales and Marketing Ltd | London | 2020 |
| AMC (South West) Limited | Taunton | 2018 |
| AMC Beauty Ltd | Maghera | 2024 |
| AMC Consulting Ltd | Blackburn | 2019 |
| AMC Inc Limited | London | 2018 |
| AMC Mary Caine Limited | Gerrards Cross | 2026 |