| A.F. Schofield Roofing & Building Limited | London | 2000 |
| A.F. Staircase Systems Limited | Liversedge | 1995 |
| A.F. Starr Limited | | 1982 |
| A.F. Tiling Ltd | Gravesend | 2019 |
| A.F. Treacher Glazing Limited | Romford | 1999 |
| A.F.A.R. Construction Services Limited | London | 2007 |
| A.F.B Ltd | Dunstable | 2022 |
| A.F.Drew (Construction) Limited | Bristol | 1967 |
| A.F.M (Nw)Construction & Maintenance Ltd | Liverpool | 2024 |
| A.F.P. Construction (Bishopton) Limited | Inchinnan | 1977 |
| A.F.S (West Mids) Ltd | Solihull | 2023 |
| A.F.S Liverpool Civils Limited | Southport | 2016 |
| A.F.S.H. Properties Limited | Bolton | 2016 |
| A.F.T Rigging Limited | Sutton | 2022 |
| A.Fernandez Ltd | London | 2021 |
| A.Findlay Engineering Ltd | Aberdeen | 2023 |
| A.Flowers Consultancy Ltd | Broxbourne | 2026 |
| A.Frost Electrical Ltd | Glasgow | 2025 |
| A.G Constructions Oldham Ltd | Oldham | 2024 |
| A.G Electrical & Lighting Ltd | Bedford | 2026 |
| A.G Firestopping Limited | Birmingham | 2023 |
| A.G Grey Consulting Ltd | London | 2017 |
| A.G Hardwood Flooring Limited | London | 2014 |
| A.G Installations Ltd | Wakefield | 2020 |
| A.G Plastering & Render Ltd | Poole | 2025 |
| A.G Property Care Limited | Roslin | 2019 |
| A.G Spence & SON Limited | Buckie | 2025 |
| A.G. Brooks Limited | Heybridge Maldon | 2003 |
| A.G. Builders and Contractors Limited | Bridgnorth | 2011 |
| A.G. Building Services Limited | Uckfield | 2015 |
| A.G. Connections Ltd | Waterlooville | 2022 |
| A.G. Contractors Limited | Aberdeen | 2002 |
| A.G. Electricals Limited | Cockermouth | 2005 |
| A.G. England Flooring Limited | Avon | 2004 |
| A.G. Fencing Limited | Sandbach | 2005 |
| A.G. Hipgrave Limited | Hertfordshire | 1979 |
| A.G. International Renovations Ltd | London | 2022 |
| A.G. Langham & Sons Limited | Chichester | 1998 |
| A.G. Macnab Limited | Weston Super Mare | 1994 |
| A.G. Mallinson GAS, Plumbing & Heating Limited | Gateshead | 2017 |
| A.G. Marshall Limited | St. Austell | 1954 |
| A.G. O'Malley Limited | | 2007 |
| A.G. Plant Hire and Construction Limited | Wolverhampton | 2020 |
| A.G. Plumbing & Heating Ltd | Kingswood | 2005 |
| A.G. Reed Limited | Loughton | 2016 |
| A.G. Stuart Holdings Limited | Insch | 1993 |
| A.G. Tiling Ltd | Rugby | 2024 |
| A.G. Titan Construction Ltd | London | 2025 |
| A.G. Tremain Limited | Colchester | 1972 |
| A.G.& H.G.Groundworks Limited | Pontefract, | 1972 |
| A.G.A Brickwork Limited | Peterborough | 2023 |
| A.G.A Plumbing Limited | Knaresborough | 2021 |
| A.G.A Renovations Ltd | London | 2017 |
| A.G.A.A Investments Ltd | Swansea | 2019 |
| A.G.B.S (South East) Ltd | Ashford | 2025 |
| A.G.Beer Brickwork Ltd | Bognor Regis | 2020 |
| A.G.Brown(Builders)Limited | Cromer | 1946 |
| A.G.C. Developments Limited | Crawley | 2005 |
| A.G.C.A. Projects Ltd | London | 2024 |
| A.G.D Builders Limited | London | 2020 |
| A.G.D. Dorflo Limited | Witney | 2002 |
| A.G.E Builders Ltd | Worksop | 2026 |
| A.G.E Construction Ltd | London | 2018 |
| A.G.E. Electrical Services (Aylesbury) Limited | Great Missenden | 2002 |
| A.G.E. Electrical Services Limited | Peterborough | 1989 |
| A.G.Erection Limited | Lancashire | 1999 |
| A.G.Jessopp Limited | Poole | 1961 |
| A.G.Leer Limited | Cardiff | 1963 |
| A.G.M Building Constructions Ltd | London | 2020 |
| A.G.M T/A Abel Group Midlands Ltd. | Atherstone | 2016 |
| A.G.Manly Group Ltd | Solihull | 1948 |
| A.G.N. Constructions Limited | Glasgow | 1995 |
| A.G.R Building Ltd | Bexhill-On-Sea | 2026 |
| A.G.R Electrics Ltd | Colchester | 2025 |
| A.G.R. Scaffolding Ltd | Hove | 2011 |
| A.G.Redman&Son Ltd | Pershore | 2014 |
| A.G.S Eco Ltd | Worksop | 2026 |
| A.G.S. (Chelmsford) Limited | Saxmundham | 2003 |
| A.G.S. (NW) Limited | Stockport | 2010 |
| A.G.S. (Steel Erectors) Limited | Coatbridge | 2001 |
| A.G.T ICF Woodcrete Construction and Consultating Limited | Elgin | 2024 |
| A.G.T. Electrical (Exeter) Limited | Exeter | 1974 |
| A.G.T. Surveys Limited | Ventnor | 1997 |
| A.G.V Building Ltd | Westbury | 2017 |
| A.G.V.S. Installations Limited | Lancashire | 2002 |
| A.G.W. Howell (Builder) Limited | Stroud | 2006 |
| A.G.W. Limited | Oxford | 1991 |
| A.Gallani Ltd | Milton Keynes | 2021 |
| A.Ghafoori Limited | Walsall | 2025 |
| A.Gold Construction Ltd | Blackwood | 2021 |
| A.H Elec Ltd | Brentwood | 2026 |
| A.H Electrics Limited | London | 2018 |
| A.H Gardens Ltd | London | 2018 |
| A.H Group Services Ltd | Derby | 2025 |
| A.H Heating & Plumbing (Norfolk) Ltd | Sheringham | 2020 |
| A.H Property Development Ltd | Ashton-Under-Lyne | 2005 |
| A.H Property Services Ltd | Wolverhampton | 2022 |
| A.H. (Notts) Limited | Nottingham | 2018 |
| A.H. Bennett & Co. (Builders) Limited | Shrewsbury | 1959 |
| A.H. Castle Keep Ltd | Poole | 2021 |