| Allison Homes South West Limited | Peterborough | 2011 |
| Allison Homes SW Limited | Peterborough | 2017 |
| Allison Paving Ltd | Leigh-On-Sea | 2001 |
| Allison Plant Services Limited | Billingham | 2016 |
| Allison Plumbing and Heating Limited | Dudley | 2025 |
| Allison Squire Limited | Carshalton | 2017 |
| Allister Group Construction Ltd | Farnborough | 2024 |
| Allister Tulett Plumbing and Heating Limited | Sevenoaks | 2013 |
| Allistone Commissioning Services Ltd | Eastbourne | 2021 |
| Allistone Electrical Limited | Hailsham | 2012 |
| Allistone Property Development Ltd | Hartlepool | 2025 |
| Allium Designer Homes Ltd | Horsham | 2016 |
| Alliux Contracts Limited | London | 2022 |
| Allln Building Services Ltd | London | 2022 |
| Allman Builders Limited | Manchester | 2007 |
| Allman Contract Services Ltd | Crewe | 2020 |
| Allmanor Park (UK) Limited | Weybridge | 2017 |
| Allmark Services Limited | Norwich | 2004 |
| Allmark Suspended Ceilings Limited | London | 2017 |
| Allmarket Retail Display Solutions Ltd | Belfast | 2022 |
| Allmarket Solutions Ltd | Belfast | 2019 |
| Allmarque PMS Ltd | Newport | 2008 |
| Allmech Plumbing and Heating Ltd | Penwortham | 2020 |
| Allmek Limited | Stoke On Trent | 1993 |
| Allmeron Construction Limited | Riding Mill | 2022 |
| Allmetal & Construction Limited | Birmingham | 2008 |
| Allmid Limited | Birmingham | 1985 |
| Allmulti Build Ltd | Canterbury | 2015 |
| Allnall Solutions Ltd | Walsall | 2022 |
| Allnim Ltd | Midhurst | 2011 |
| Allnolans Scaffolding Ltd | Salisbury | 2024 |
| Allns Plumbing & Heating Ltd | Edinburgh | 2024 |
| Alloa Electrical Contractors Ltd | Alloa | 2018 |
| Alloa Grove Homes Limited | East Kilbride | 2025 |
| Alloa Propco SL Limited | Bolton | 2021 |
| Allodi Construction Ltd | Dartford | 2023 |
| Allodi Property Developments Limited | Dartford | 2011 |
| Allon Construction Limited | Hull | 2018 |
| Allon Homes Limited | Hull | 2011 |
| Allora Design & Build Ltd | Cardiff | 2022 |
| Allora Property Group Ltd | Surbiton | 2026 |
| Allorjenn Limited | Chepstow | 2015 |
| Allouch Plumbing & Electricals Ltd | London | 2025 |
| Allouch Plumbing Ltd | Southall | 2020 |
| Allouison Investments Limited | Brentwood | 2021 |
| Alloush Ltd | London | 2021 |
| Allout Bathrooms Ltd | Pontefract | 2025 |
| Allow Trading Ltd | Ilford | 2022 |
| Alloxx Ltd | Romford | 2025 |
| Alloy Project Solutions Limited | Epping | 2016 |
| Alloydeck Pro Remediations Ltd | Ashford | 2026 |
| Alloyvale Limited | Petersfield | 1982 |
| Allpan Ltd | Dunstable | 2010 |
| Allpave Ltd | Poole | 2017 |
| Allphase Electric Ltd | Abbots Langley | 2021 |
| Allphase Electrical Solutions Limited | Bucks | 2021 |
| Allphaseuk Ltd | Swindon | 2019 |
| Allpile Foundations Limited | Benfleet | 1997 |
| Allpile Group Ltd | Dunstable | 2020 |
| Allpipes Civils Ltd | Carmarthen | 2022 |
| Allplay Ireland Limited | | 2009 |
| Allpoints Painters and Decorators Ltd | Rochester | 2011 |
| Allport Carpets & Flooring Limited | Wirral | 2017 |
| Allport Electrical & Fire Security Ltd | Cockermouth | 2017 |
| Allport Installations Ltd | Burton On Trent | 2019 |
| Allport Mechanical Ltd | Hartshill | 2023 |
| Allport Properties Ltd | Tenby | 2026 |
| Allport Properties York Ltd | Tunbridge Wells | 2014 |
| Allport Refrigeration Ltd | Cannock | 2024 |
| Allports Family Investments Limited | St Asaph | 2006 |
| Allpower Group Ltd | Bristol | 2022 |
| Allpower Limited | Bristol | 1995 |
| Allpower Solutions Limited | Stoke-On-Trent | 2020 |
| Allpress Electrical Services Limited | Bradford | 2024 |
| Allpro Building Contractors Ltd | Slough | 2021 |
| Allpro Construction Limited | Derry | 2019 |
| Allpro Flooring Projects Ltd | Lincoln | 2025 |
| Allpro Group Ltd | Orpington | 2021 |
| Allpro Installations Limited | Gravesend | 2017 |
| Allpro Ltd | Loughton | 2020 |
| Allpro Roofing Ltd | Hounslow | 2026 |
| Allpro Roofing&Guttering Ltd | Sutton | 2023 |
| Allprocess Control Limited | Epsom | 1997 |
| Allrend (NW) Limited | St Helens | 2025 |
| Allrend Ltd | Nantwich | 2019 |
| Allresin Limited | Ilkley | 2024 |
| Allright General Builder Limited | Bromley | 2014 |
| Allrise Scaffolding Ltd | Redruth | 2023 |
| Allro Limited | London | 1980 |
| Allroofs-Uk Ltd | Rochester | 2021 |
| Allround Building Services Limited | Slough | 2017 |
| Allround Electrical Services Limited | Buckfastleigh | 1991 |
| Allround Fixing Ltd | Hornchurch | 2019 |
| Allround GAS Services (Ayrshire) Limited | Maybole | 2019 |
| Allround Group Services Ltd | Buckfastleigh | 2019 |
| Allround Homes & Developments Ltd | Plymouth | 2011 |
| Allround House Service Ltd | London | 2012 |
| Allround Interiors Ltd | Uxbridge | 2013 |
| Allround Plastering Ltd | Rochford | 2017 |
| Allround Plumbing Services Limited | Bewdley | 2003 |