| Al-Rayhana International for Investment Ltd | Manchester | 2025 |
| Al-Saedy Electrical Ltd | London | 2024 |
| Al-Tammar Ltd | Morden | 2024 |
| Al-Tempus Group Ltd | Barkingside | 2020 |
| Al-Toumi United for Development and Real Estate Investment Ltd | London | 2025 |
| Al-Wahab International Ltd | Oldham | 2015 |
| AL05 Building Limited | Surbiton | 2025 |
| AL1 Construction Services Limited | Hatfield | 2023 |
| AL1 Design Ltd | St. Albans | 2023 |
| AL2 Engineering Ltd | St. Albans | 2026 |
| AL2BUILDER Ltd | London | 2021 |
| ALA Building Services Ltd | Cardiff | 2025 |
| ALA Construction Limited | Northampton | 2016 |
| ALA Maintenance Ltd | Minehead | 2025 |
| ALA Pergola & Tent Limited | London | 2018 |
| ALA Reworks Limited | Smethwick | 2025 |
| Alaal Limited | London | 2022 |
| Alabama Contracting UK Limited | Barking | 2016 |
| Alabas Ltd | Bristol | 2015 |
| Alabaster Building Services Limited | Sandown | 2003 |
| Alabdullah for Trading Ltd | Manchester | 2025 |
| Alacon Ltd | Liverpool | 2025 |
| Aladdin's Venture Ltd | London | 2023 |
| Aladhi Building and Construction Ltd | London | 2025 |
| Aladin Construction Network Limited | Wigan | 2024 |
| Aladin Services Ltd | Barnet | 2013 |
| Alador Constructions Ltd | Greenford | 2021 |
| Alafaq Global Trading Ltd | Harrogate | 2025 |
| Alagie Jadama Electrical Limited | Crawley | 2023 |
| Alagio Ltd | Luton | 2026 |
| Alagray Ltd | Redcar | 2025 |
| Alahkaf International for Growth and Development Ltd | Manchester | 2025 |
| Alaia Group Ltd | Maldon | 2024 |
| Alain Assembling Ltd. | London | 2020 |
| Alain Couverture Ltd | London | 2026 |
| ALAKPROPERTYSERVICES2000 Ltd | Norwich | 2018 |
| Alam 22 Company Limited | London | 2022 |
| Alam and Q Investments Ltd | Woodford Green | 2017 |
| Alam Excavation Limited | Rotherham | 2025 |
| Alam Financial Ltd | Wembley | 2018 |
| Alam Properties & Developments Limited | Dunstable | 2015 |
| Alam Property Group Ltd | Luton | 2024 |
| Alam TRY Limited | Hornchurch | 2021 |
| Alamar Assets Ltd | Great Warley | 2020 |
| Alamaz Properties Limited | Cheadle | 2019 |
| Alambra Professional Services Limited | Hasland | 2017 |
| Alamco Projects Ltd | Knutsford | 2007 |
| Alamdaar Maintenance Ltd | Manchester | 2024 |
| Alamdar Design & Build Ltd | Leicester | 2025 |
| Alameen Construction Ltd | Ilford | 2023 |
| Alamo Blinds Ltd | Wolston | 2011 |
| Alamode Properties Limited | Milton Keynes | 2016 |
| Alams Group Limited | Blackburn | 2022 |
| Alamus Ltd | Salisbury | 2022 |
| Alan Wilson Joiners & Builders Ltd | Denny | 2019 |
| Alan & Alan Ltd | Ilford | 2022 |
| Alan & Gary Services Ltd | Wellingborough | 2015 |
| Alan (Civil and Building) Contractors Limited | London | 2016 |
| Alan 2 Build Limited | Basingstoke | 2022 |
| Alan Allison (1980) Limited | Romiley, Stockport | 2005 |
| Alan Amonra Trust Limited | Chiswick | 2014 |
| Alan Archer Property Services Ltd | Ashby-De-La-Zouch | 2026 |
| Alan Arkle & SON Limited | Rothbury | 2015 |
| Alan Armitage Limited | Halifax | 2017 |
| Alan Astley Bricklayers Limited | Preston | 2013 |
| Alan Atkinson Limited | Whitby | 2002 |
| Alan Auld Roofing Ltd. | Glasgow | 2002 |
| Alan Bailey Groundworks Limited | Ashbourne | 2004 |
| Alan Ball Flooring Limited | Shrewsbury | 2009 |
| Alan Ball Roofing Limited | Dover | 2018 |
| Alan Bangs Ltd | Hessle | 2022 |
| Alan Bark Limited | Rotherham | 2015 |
| Alan Barron Limited | Morden | 2013 |
| Alan Beckett Brickwork Ltd | Euxton Lane, Chorley | 2015 |
| Alan Bell Building Services Limited | Cardiff | 2010 |
| Alan Bell Construction & Development Ltd | Glasgow | 2015 |
| Alan Bender Limited | Colchester | 2002 |
| Alan Benfield Limited | Belper | 1991 |
| Alan Berry Limited | Timperley | 2002 |
| Alan Best Contracts Limited | Wembley | 1949 |
| Alan Bettin (Swimming Pools) Limited | Farnham | 1988 |
| Alan Bettin Limited | Surrey | 2001 |
| Alan Blair Demolition Ltd | Ryton | 2016 |
| Alan Blake Limited | Bristol | 2008 |
| Alan Boyle Construction Ltd | Chepstow | 2026 |
| Alan Briant Limited | Clifton | 2015 |
| Alan Brimacombe Thatcher Limited | Okehampton | 2020 |
| Alan Brook Construction Limited | Rotherham | 2005 |
| Alan Brown Builders Limited | Barnet | 2002 |
| Alan Brown Roofing Limited | Nottingham | 2003 |
| Alan Brown Surfacing Limited | Ashbourne | 2006 |
| Alan Buchan Contractors Limited | Banchory | 2002 |
| Alan Buchan Homes Limited | Banchory | 2014 |
| Alan Buckley Electrical Limited | Prenton | 2018 |
| Alan Builder Ltd | Croydon | 2022 |
| Alan Butcher Limited | Wells | 2021 |
| Alan C Davis & Associates Limited | Stockport | 2004 |
| Alan C Ford (Homes) Ltd | Uxbridge | 2026 |
| Alan C Ford (ROY Road) Ltd | Harrow | 2020 |
| Alan C Stevenson Ltd | Orkney | 2011 |