| Alive Construction Limited | Womersley | 2016 |
| Alive Design Contracts Limited | Newry | 2021 |
| Alive Design Ltd | Leeds | 2014 |
| Alix Groundwork Ltd | Halkirk | 2025 |
| Alixei Haulage Limited | Canvey Island | 2018 |
| Aliyas Plastering Ltd | Luton | 2024 |
| Alize House Ltd | London | 2025 |
| Alizeti Limited | Chorley | 2018 |
| Ali’S Investment Property Limited | Corby | 2025 |
| ALJ Decorators Ltd | Bathgate | 2015 |
| ALJ Electrical Ltd | Leeds | 2025 |
| ALJ Roofing Ltd | Newcastle Upon Tyne | 2025 |
| Aljabban Builder Limited | Newcastle Upon Tyne | 2023 |
| Aljac Welding Services Co. Ltd. | Wilmslow | 2023 |
| Aljanaen Limited | London | 2016 |
| Aljarad Removals Ltd | London | 2026 |
| Aljawad Management Ltd | London | 2022 |
| Aljc Limited | Luton | 2020 |
| Aljitha Limited | London | 2018 |
| Aljoma Ltd | Oxted | 2015 |
| Aljoori UK Limited | London | 2024 |
| Aljtm Ltd | Wallington | 2024 |
| Aljumaily Limited | Liverpool | 2015 |
| Aljydeprojects Limited | Rochester | 2010 |
| ALK (N.I.) Limited | Craigavon | 2015 |
| ALK Earthworks & Landscaping Ltd | Wakefield | 2020 |
| ALK Groundworks Ltd | Colchester | 2014 |
| ALK Group Limited | London | 2023 |
| ALK Interiors Ltd | Peterborough | 2025 |
| ALK Mechanical Ltd | Hull | 2025 |
| ALK Offshore Ltd | Sunderland | 2026 |
| ALK Plumbing & Drainage Limited | Benfleet | 2009 |
| ALK Renovations Limited | Stafford | 2010 |
| ALK Scaffolding Solutions Ltd | Southampton | 2026 |
| Alka Developments Ltd | Solihull | 2022 |
| Alka Engineering & Construction Ltd | Ramsgate | 2022 |
| Alkaber Limited | London | 2020 |
| Alkag Ltd | Colchester | 2018 |
| Alkaline Property Limited | Swindon | 2018 |
| Alkami Solutions Ltd | London | 2019 |
| Alkaram Construction Ltd | Manchester | 2023 |
| Alkarar Aldawleya for Investment Ltd | Manchester | 2025 |
| Alkas Services Ltd | Lancashire | 2025 |
| Alkaya Development Ltd | Mitcham | 2026 |
| Alkb Limited | Newport Pagnell | 2013 |
| Alkdelec Limited | Bolton | 2018 |
| Alkeb TM Ltd | London | 2019 |
| Alkel Homes Limited | Swansea | 2013 |
| Alkemist Build and Decorate Ltd | London | 2020 |
| Alken Renovations Ltd | London | 2024 |
| Alkenby Bespoke Homes Ltd | Padstow | 2019 |
| Alker Development Ltd | Wigan | 2025 |
| Alker Electrical Contracting Ltd | Bristol | 2026 |
| Alker Rail Ltd | Wigan | 2019 |
| Alket Dara Group Ltd | Wembley | 2025 |
| Alketons Meteron Limited | London | 2019 |
| Alkhair Services Ltd | Birmingham | 2021 |
| Alkham Investments | London | 1962 |
| Alkhateeb Group Limited | Harrow | 2024 |
| Alkim Ltd | London | 2017 |
| Alkimos Developments Limited | Keighley | 2021 |
| Alko Design and Build Ltd | London | 2019 |
| Alkod Building Construction Ltd | London | 2021 |
| Alkoubaisi Investments Ltd | London | 2016 |
| Alkoud Constructions Ltd | London | 2023 |
| Alkrington Joinery Ltd | Manchester | 2026 |
| Alks Joinery Limited | Sheffield | 2021 |
| ALL !N 0N£1 Solution Ltd | London | 2025 |
| ALL (T/A Anglesey Luxury Lodges) Ltd | Isle Of Anglesey | 2023 |
| ALL -Sorts Property Maintenance and Carpentry Ltd | Woking | 2025 |
| ALL 2 C Limited | Essex | 2007 |
| ALL 3 Limited | Stanmore | 2008 |
| ALL 4 Construction Limited | Richmond | 2023 |
| ALL 4 Corners Ltd | Scunthorpe | 2025 |
| ALL 4 Electrical Limited | Chislehurst | 2016 |
| ALL 4 GAS Ltd | Welwyn Garden City | 2017 |
| ALL 4 Heating & GAS Limited | Wednesbury | 2019 |
| ALL 4 Homes Construction Ltd | Guildford | 2026 |
| ALL 4 Image Ltd | Stanford-Le-Hope | 2021 |
| ALL 4 JS Ltd | Bury St. Edmunds | 2026 |
| ALL 4 Ltd | Windermere | 2016 |
| ALL 4 Mechanical Limited | Colchester | 2024 |
| ALL 4 Property Limited | Kingston Upon Thames | 2017 |
| ALL 4 Services Ltd | Harrow | 2021 |
| ALL 4 Tiling JB Ltd | Upminster | 2016 |
| ALL 4 YOU Contractors Ltd | Swansea | 2017 |
| ALL AB Limited | Antrim | 2025 |
| ALL Aboard Building Services Limited | Epping | 2025 |
| ALL About Abodes Ltd | Eastbourne | 2021 |
| ALL About AV Audio Visual Ltd | Greenford | 2024 |
| ALL About AV Smart Home Ltd | Greenford | 2024 |
| ALL About Boilers Ltd | Wallington | 2024 |
| ALL About Build Ltd | Gloucester | 2022 |
| ALL About Building Services Ltd | Tunbridge Wells | 2020 |
| ALL About Civils Ltd | Mansfield | 2022 |
| ALL About Construction Ltd | Slough | 2019 |
| ALL About Damp Ltd | Hull | 2025 |
| ALL About Decorating Ltd | Southampton | 2023 |
| ALL About Drainage Limited | Leighton Buzzard | 2021 |
| ALL About Electric Services Limited | Cardiff | 2019 |