| Ambient Living Ltd | Ilford | 2015 |
| Ambient Plumbing & Heating Limited | Newcastle Upon Tyne | 2003 |
| Ambient Plumbing & Heating Services Ltd | Preston | 2022 |
| Ambient Plumbing & Heating Solutions Ltd | Higham Ferrers | 2025 |
| Ambient Services Limited | Herts | 2004 |
| Ambient Spas Ltd | Preston | 2021 |
| Ambient Technical Limited | Huddersfield | 2017 |
| Ambient Temperature GAS Ltd | Sturminster Newton | 2014 |
| Ambient Windows & Doors Limited | Romford | 2025 |
| Ambiente Bespoke Ltd | Weston-Super-Mare | 2023 |
| Ambiente Services Ltd | Liverpool | 2017 |
| Ambiflex Limited | Altrincham | 1988 |
| Ambiflow Limited | Ilkley | 2017 |
| Ambigas Limited | West Bromwich | 2012 |
| Ambiheat Ltd | Salisbury | 2022 |
| Ambik Construction Ltd | Hounslow | 2025 |
| Ambika Building Services Limited | Wilmslow | 2008 |
| Ambika House Limited | London | 1982 |
| Ambika Investments Limited | Stanmore | 2013 |
| Ambilco Ltd | Newcastle Upon Tyne | 2018 |
| Ambilliam Loft Access Limited | Hereford | 2024 |
| Ambio Hvac Services Ltd | Biggleswade | 2026 |
| Ambion Contractors Ltd | Hinckley | 2013 |
| Ambir Ltd | Birmingham | 2024 |
| Ambisite Solutions Limited | Epping | 2024 |
| Ambison Management Limited | Hitchin | 2015 |
| Ambit Caledonian Limited | Dingwall | 1986 |
| Ambit MHS Limited | Kings Lynn | 2013 |
| Ambitherma Ltd | Pengam | 2023 |
| Ambitio Limited | Portsmouth | 2014 |
| Ambition Building & Maintenance Ltd | Ivybridge | 2017 |
| Ambition Community Homes | Bristol | 2022 |
| Ambition Services Ltd | London | 2022 |
| Amble GAS Services Limited | Morpeth | 2012 |
| Ambledon Civils Ltd | Hull | 2022 |
| Ambleland Limited | Nr. Bracknell | 1985 |
| Ambler Civil Engineering Ltd | Normanton | 2018 |
| Ambler Consultants Limited | Horsham | 2023 |
| Ambler Electrical & Home Improvements Ltd | Gillingham | 2014 |
| Ambler Group Limited | London | 2020 |
| Ambler Mills Limited | Halifax | 2018 |
| Ambleside Building Contractors Limited | Kendal | 1997 |
| Ambleside Builds Ltd | Middlesbrough | 2026 |
| Ambleside Engineering Company (Lakes) Limited | Kendal | 1957 |
| Ambleside Engineering Ltd | Southend-On-Sea | 2025 |
| Ambleside Homes (Galtres) Limited | York | 2017 |
| Ambleside Homes (Sparrow 2025) Ltd | York | 2025 |
| Ambleside Homes Limited | York | 2014 |
| Ambleside Limited | York | 1998 |
| Ambleside Plumbing and Heating Ltd | Dundee | 2021 |
| Ambleside Residential Developments Limited | York | 2009 |
| Ambleside Roofing Limited | Ambleside | 2019 |
| Ambleworth Limited | Watford | 2019 |
| Ambo Group Limited | Slough | 2019 |
| Ambony Groundworks Limited | Swanley | 2006 |
| Ambr Developments Ltd | Guildford | 2024 |
| Ambra Electrical Ltd | Southampton | 2016 |
| Ambreen Properties Limited | London | 2019 |
| Ambresbury Limited | Pinner | 2014 |
| Ambrey Baker Industrial Solutions Ltd | Sleaford | 2006 |
| Ambrig Building Ltd | Newbury | 2016 |
| Ambrison Developments Limited | Ashburton | 2023 |
| Ambro Building Services Limited | Waterlooville | 2004 |
| Ambroci Limited | Wigan | 2024 |
| Ambros Home Maintenance Ltd | Cradley Heath | 2025 |
| Ambrosden Developments Limited | Brackley | 2019 |
| Ambrose & Locke Limited | Taunton | 2013 |
| Ambrose Building Solutions Ltd | Loughton | 2026 |
| Ambrose Ellis Painting Contractors Limited | Cheshire | 2002 |
| Ambrose Homes (East Anglia) Ltd | Norwich | 2003 |
| Ambrose Offshore Management Services Ltd | Middlesbrough | 2014 |
| Ambrose Plumbing & Heating Ltd | Salisbury | 2025 |
| Ambrose Roofing Limited | Ely | 2021 |
| Ambrose Services Limited | Chigwell | 2018 |
| Ambrose Smith Limited | Gerrards Cross | 2011 |
| Ambrose Tech Limited | Grays | 2018 |
| Ambrose Utilities Limited | Liverpool | 2023 |
| Ambrose Wilson Kitchens Limited | Stockton-On-Tees | 2026 |
| AMBROSE86 Ltd | Eastleigh | 2017 |
| Ambrosi Insulation Ltd | Walsall | 2025 |
| Ambrosiana Developments Ltd | London | 2022 |
| Ambrot Civil Engineering & Construction Ltd | Coventry | 2017 |
| Ambrozia Ltd | London | 2019 |
| Ambrus Property Services Ltd | London | 2023 |
| Ambs Building Services Ltd | London | 2024 |
| Ambs Design Ltd | Wembley | 2023 |
| Ambs Eco Limited | St. Albans | 2021 |
| Ambs Eco Solutions Limited | St. Albans | 2020 |
| Ambuja Ltd | London | 2024 |
| Ambursley TM Ltd | Waltham Abbey | 2024 |
| Ambury Bath Limited | London | 2011 |
| Ambury Build Limited | Romford | 2013 |
| Ambury Developments Limited | Huntingdon | 2001 |
| Ambury Installations Ltd | Gravesend | 2013 |
| Ambuscade Ltd | London | 2020 |
| Ambvai Ltd | London | 2015 |
| Amby Project Solutions Ltd | Leeds | 2024 |
| Ambyn Electrical Limited | Chesham | 2011 |
| AMC & Sons Ltd | Neath | 2016 |
| AMC Air Conditioning 2026 Limited | Bedford | 2026 |