| Allan Mcdowall Electrical Limited | Wigtown | 2008 |
| Allan Mechanical Ltd | Saffron Walden | 2021 |
| Allan Morrice Fencing Ltd | Motherwell | 2023 |
| Allan Moule Piping Limited | Mastrick | 2015 |
| Allan Munro Construction Group Limited | Aviemore | 2018 |
| Allan Munro Construction Ltd | Aviemore | 2001 |
| Allan Oliver Reinforcing Limited | County Durham | 1999 |
| Allan Passmore Joinery Limited | Guisborough | 2003 |
| Allan Peters Building Ltd | Horsham | 2022 |
| Allan Pinkerton Limited | South Milford | 2007 |
| Allan Plumbing & Heating Ltd | Greenock | 2020 |
| Allan Projects Ltd | Stranraer | 2026 |
| Allan Property Developments Ltd | Turriff | 2025 |
| Allan Property Services (Scotland) Ltd | Kilmarnock | 2015 |
| Allan Robertson & SON Ltd | Perth | 2013 |
| Allan ROY Joiner Ltd | Carnoustie | 2025 |
| Allan Shiels Limited | Dalkeith | 2025 |
| Allan Slaters & Builders Limited | Motherwell | 2008 |
| Allan Taylor (Motors) Limited | Southall | 1940 |
| Allan Underdown Building Services Ltd | Maidstone | 2015 |
| Allan Wall Painting and Fencing Ltd | Cramlington | 2022 |
| Allan Water Construction Limited | Stirling | 2007 |
| Allan Water Developments Limited | Bridge Of Allan | 1980 |
| Allan Water Homes (Cambusbarron) Limited | Stirling | 2020 |
| Allan Water Homes (Chryston) Limited | Stirling | 2020 |
| Allan Water Homes (Heartlands) Limited | Stirling | 2017 |
| Allan Water Homes Limited | Stirling | 1988 |
| Allan Water Trading Ltd | Stirling | 2011 |
| Allan Watson Electrical Limited | London | 2003 |
| Allan Webster & SON Ltd | Cleckheaton | 2002 |
| Allan White Trading Limited | Maidstone | 1987 |
| Allan Whyte (Electrical Contractors) Limited | Perth And Kinross | 1997 |
| Allan Wright Construction Ltd | Watford | 2016 |
| Allan's Bobcat Ltd | Preston | 2025 |
| Allan's Painting Ltd | Gott | 2014 |
| Allancia Limited | Washington | 2006 |
| Alland Drylining & Construction Ltd | Burgess Hill | 2025 |
| Alland Timber Limited | West Midlands, England | 2026 |
| Allandale Limited | Cupar | 2021 |
| Allandale Property Group Ltd | Accrington | 2026 |
| Allandale's Refurbs (Yorkshire) Limited | Shipley | 2017 |
| Allandmore Limited | Crieff | 2018 |
| Allandor Ltd | Blackburn | 2009 |
| Allandore Megreen International Limited | London | 2022 |
| Allangate Mechanical Services Ltd. | Liverpool | 1993 |
| Allania Ltd | Yeovil | 2021 |
| Allans Joinery Ltd | London | 2025 |
| Allanson Construction Consultancy Ltd | Sheffield | 2018 |
| Allanvale Homes (Prestwick) Ltd | Glasgow | 2018 |
| Allanvale Land (Auchincruive) Limited | Ayr | 2020 |
| Allanvale Land (Linlithgow) Limited | Renfrew | 2020 |
| Allanvale Land (Pentland) Limited | Kilmarnock | 2021 |
| Allanvale Land Investments Limited | 79 Renfrew Road | 2005 |
| Allan’S Team Ltd | London | 2026 |
| Allapps Limited | Greenford | 2019 |
| Allaraj Brothers Ltd | London | 2023 |
| Allaraj Construction Ltd | New Malden | 2023 |
| Allard & Company,Limited | Redhill | 1912 |
| Allard Developments Limited | Waltham Abbey | 2020 |
| Allard Home Improvements Ltd | Mildenhall | 2025 |
| Allardyce Interiors Ltd | Leicester | 2019 |
| Allaround Renovation Ltd | Dunstable | 2020 |
| Allaround UK Ltd | Reading | 2016 |
| Allaspects 247 Ltd | Staines-Upon-Thames | 2024 |
| Allaspex Building Services Limited | West Sussex | 2005 |
| Allaspex Ltd | Devon | 2003 |
| Allasso Recycling Limited | St. Albans | 2013 |
| Allaston Developments Limited | Lydney | 2013 |
| Allats Ltd | London | 2020 |
| Allaway Acoustics Limited | Herts | 1969 |
| Allaway Property Investments Ltd | Torquay | 2023 |
| Allaz Ltd | London | 2022 |
| Allbar FMS Ltd | Glasgow | 2018 |
| Allbeta Limited | Norwich | 2020 |
| Allbits Solutions Ltd | Coulsdon | 2015 |
| Allbon Homes Ltd | Ipswich | 2022 |
| Allboxnation Limited | London | 2016 |
| Allbrad Ltd | London | 2014 |
| Allbricks&Pillar Ltd | London | 2025 |
| Allbright Electrical Contractors Ltd | Glasgow | 2015 |
| Allbright Glass Company Limited | London | 1998 |
| Allbright Homes Ltd | Stevenage | 2025 |
| Allbright Limited | Bognor Regis | 2019 |
| Allbright Painting Ltd | Worthing | 2019 |
| Allbright Property Maintenance Ltd | Peterborough | 2014 |
| Allbright Windows Limited | Wolverhampton | 2003 |
| Allbritain Construction Limited | Worcester | 2011 |
| Allbro BC Limited | Chesham | 2017 |
| Allbrook Heating Limited | Winchester | 2012 |
| Allbrown Universal Components Limited | Bromley | 1975 |
| Allbuild Bristol Limited | Wotton Under Edge | 2016 |
| Allbuild Canterbury Limited | Folkestone | 2014 |
| Allbuild Consultancy Ltd | Saltash | 2025 |
| Allbuild Developments SW Ltd | Saltash | 2022 |
| Allbuild Kent Ltd | London | 2016 |
| Allbuild Limited | Redhill | 1987 |
| Allbuild London Solutions Ltd | London | 2025 |
| Allbuild Solutions Ltd | London | 2025 |
| Allbuild Suffolk Ltd | Ipswich | 2024 |
| Allbuilding Building Services (Essex) Ltd | Brentwood | 2014 |