| A.C.E Services (Tamworth) Limited | Tamworth | 2016 |
| A.C.E. Industrial Plastics Limited | Ravensthorpe Industrial Estate | 1962 |
| A.C.I Solutions Ltd | Chesterfield | 2024 |
| A.C.J. Industrial Limited | Whitby | 1974 |
| A.C.L International Ltd | Northampton | 2025 |
| A.C.L. Engineering Limited | Hertfordshire | 1980 |
| A.C.O LMT Ltd | London | 2026 |
| A.C.P Supplements Limited | Midhurst | 2019 |
| A.C.P. (Acoustics) Limited | Sutton-In-Ashfield | 1979 |
| A.C.P. Chemicals Limited | Slough | 1983 |
| A.C.S Vehichles Ltd | Enfield | 2024 |
| A.C.S. (Midlands) Limited | Tamworth | 2004 |
| A.C.S. Textiles Limited | Lancashire | 1996 |
| A.C.T. Communications Limited | Aylesford | 1993 |
| A.C.T. Distribution Limited | Romsey | 2009 |
| A.C.T. Energy Limited | Brookwood | 1997 |
| A.C.W Motors Limited | Canvey Island | 2003 |
| A.Carlton Limited | Ruislip | 2025 |
| A.Carmichael & Co.Limited | North Ferriby | 1941 |
| A.Cheer & Sons,Limited | Boston | 1938 |
| A.Clarke and Sons Limited | Dunmow | 1961 |
| A.Coombs Pet Centre Limited | Brighton | 1966 |
| A.D Distributions Limited | Harlow | 2025 |
| A.D Group 365 Ltd | Kington | 2025 |
| A.D Recycling Systems Ltd | Tamworth | 2022 |
| A.D Superstores Limited | Retford | 2010 |
| A.D. Associates Limited | Erith | 1991 |
| A.D. Byers Limited | Wolverhampton | 2001 |
| A.D. Coach Systems Limited | Stoke-On-Trent | 1989 |
| A.D. Fergusson & Co. Limited | Sheffield | 1981 |
| A.D. Fleet Safety Limited | Stafford | 2026 |
| A.D. Fuel Oils Limited | Essex | 1983 |
| A.D. Mitchell & Sons (Plumbers) Limited | | 1954 |
| A.D. Scaffolding North East Limited | Consett | 2009 |
| A.D. Thomas Trading Ltd | Bury St. Edmunds | 2022 |
| A.D. Turner & Sons Limited | Newport | 2017 |
| A.D. Weinman & Co. Limited | Glasgow | 2014 |
| A.D.A. Shopfittings Limited | Deeside | 2013 |
| A.D.B Cars Repairs Ltd | Hertfordshire | 2019 |
| A.D.G. Home Center Limited | Nottingham | 1997 |
| A.D.I. Driving Tuition Limited | Hampshire | 1991 |
| A.D.J Motors Ltd | Gateshead | 2025 |
| A.D.Jones Kitchens & Bathrooms Limited | London | 1990 |
| A.D.L.H.S Ltd | Wolverhampton | 2026 |
| A.D.P. Automotive Ltd | Harrogate | 2007 |
| A.D.R. (Sussex) Limited | Littlehampton | 2001 |
| A.D.S Autos Ltd | Market Drayton | 2023 |
| A.D.S. Automotive Diagnostic Solutions Limited | Burnley | 1999 |
| A.D.S. Mobile Tyres Limited | Kings Lynn | 2018 |
| A.D.S.One Limited | Croydon | 2003 |
| A.D.T Flexibles (UK) Ltd | Leeds | 1982 |
| A.Davies & Co.(Shopfitters)Limited | Leicester | 1926 |
| A.Deans Trading Limited | Montrose | 2021 |
| A.Dhillon Limited | Swansea | 2022 |
| A.Din Electronics PVT Ltd | London | 2018 |
| A.Distribution Limited | London | 2015 |
| A.Dreamer's Limited | High Wycombe | 2024 |
| A.Dsgn.Stu Ltd | Birkenhead | 2025 |
| A.E Bargains Ltd | London | 2023 |
| A.E Engineering (Fylde) Limited | Blackpool | 2010 |
| A.E Food Ltd | London | 2025 |
| A.E Spikes Limited | London | 2025 |
| A.E. and P.I. Durston Limited | Wells | 1990 |
| A.E. Distribution Limited | Chelmsford | 1995 |
| A.E. Finch Garages Limited | Yeovil | 1978 |
| A.E. Kendrick (Garages) Limited | Ashford | 1975 |
| A.E. Knott Limited | Denton, Lancs | 1973 |
| A.E. Lenton Limited | Boston | 1949 |
| A.E. Newell & Sons Limited | Manchester | 1987 |
| A.E. Purdy Limited | East Yorkshire | 1978 |
| A.E. Rice & Co. Limited | Norfolk | 1956 |
| A.E. Struthers Limited | | 2004 |
| A.E. Vaughan & Co. Limited | London | 1991 |
| A.E. Wakeman & Sons Limited | Crediton | 1977 |
| A.E. Wilcox & SON Limited | Wotton-Under-Edge | 1950 |
| A.E. Worley & SON Limited | Southampton | 1965 |
| A.E.& F.Brittain Limited | Walsall | 1949 |
| A.E.Bartholomew & Company Limited | London | 1962 |
| A.E.Burgess & Sons,Limited | | 1942 |
| A.E.Cox Ltd | Scunthorpe | 2024 |
| A.E.G. Garages Limited | Sherborne Street John | 1960 |
| A.E.Herbert Limited | Nottingham | 1962 |
| A.E.Hewison Limited | Skegness | 1971 |
| A.E.Hobbs,Limited | Leigh-On-Sea | 1919 |
| A.E.L. (Aberdeen) Limited | Aberdeen | 1981 |
| A.E.M Classic Motorcycles Ltd | Totnes | 2015 |
| A.E.M. Builders Ltd | | 1999 |
| A.E.Poxon & Sons Limited | Walsall | 1971 |
| A.E.S.G. Developments Limited | Cheshire | 2004 |
| A.E.Spink Limited | Doncaster | 1926 |
| A.E.Ward & SON Limited | Cheshunt | 1958 |
| A.E.Y Consultancy Limited | Sheffield | 2026 |
| A.Eames Limited | London | 1938 |
| A.English Interiors & Homeware Ltd | Beckenham | 2023 |
| A.F Corporation Limited | London | 2025 |
| A.F Haulage Ltd | Wembley | 2026 |
| A.F SVS Limited | Coatbridge | 2019 |
| A.F. Belting Limited | Walsall | 2020 |
| A.F. Browne Holdings Limited | London | 2024 |
| A.F. Budge (Contractors) Limited | Leeds | 1962 |