| A. Smith (Farriers) Ltd. | Braco | 2003 |
| A. Stemn Organisation Ltd | Steyning | 2021 |
| A. Stutley & Sons Limited | Baldock | 1932 |
| A. Tucker & SON Farming Ltd | Barnsley | 2013 |
| A. W. Potatoes Ltd | Newmarket | 2016 |
| A.& E.Cooke(Farmers)Limited | Lowestoft | 1946 |
| A.1.DAIRIES(FARMS)LIMITED(THE) | Hatfield | 1950 |
| A.A. & B.W. Slack Limited | Uttoxeter | 2002 |
| A.A. Clifton Limited | Romney Marsh | 1948 |
| A.A. Read (Farms) Limited | Horncastle | 2004 |
| A.A.Broughton & SON Limited | Dorset | 1960 |
| A.B. Cave (Nurseries) Limited | Norfolk | 1947 |
| A.B. Equine Ltd | London | 2023 |
| A.B. Metson & SON Limited | Haverhill | 1963 |
| A.B. Produce PLC | London | 1988 |
| A.B.G. Farms Limited | Peterborough | 2013 |
| A.C. Coolpro Engineering Systems Ltd. | Newport | 1993 |
| A.C. Goatham and SON Limited | Rochester | 2015 |
| A.C.Gilbert & Son,Limited | Lincoln | 1913 |
| A.C.K. Contracting | Bridgnorth | 2002 |
| A.C.K. Farming Limited | Pontyclun | 2021 |
| A.C.P. Farming Ltd | Norwich | 2017 |
| A.Chandler (Bedford) Limited | Bedford | 1986 |
| A.Chandler (Norfolk) Limited | Diss | 1986 |
| A.D Agri Contractor & Pest Control Ltd | Stowmarket | 2023 |
| A.D. Walter Limited | Hampshire | 1956 |
| A.D.& K.M.Caston Limited | Halesworth | 1965 |
| A.Dinnis Agriculture Ltd | Highampton | 2021 |
| A.E Equestrian Limited | Wrexham | 2019 |
| A.E. & W.A.Farr Limited | Baldock | 1958 |
| A.E. Beckett & Sons (Lyndons) Limited | Birmingham | 1963 |
| A.E. Beckett & Sons (Rose Cottage) Limited | Birmingham | 1973 |
| A.E. Beckett & Sons Limited | Birmingham | 1961 |
| A.E. Beckett & Sons(Headley)Limited | Birmingham | 1965 |
| A.E. Bowring & Sons Limited | Mansfield | 1967 |
| A.E. Brown (Farms) Limited | Newport | 1948 |
| A.E. Franklin Limited | Sutton Coldfield | 1956 |
| A.E. Graves & SON Limited | Skegness | 2013 |
| A.E. Huddleston Limited | Lancashire | 2003 |
| A.E. Lenton (Marketing) Limited | Boston | 1947 |
| A.E. Marshall & Sons Limited | Warrington | 1960 |
| A.E. Sexton Limited | King'S Lynn | 1990 |
| A.E. Smith (Kilham) Limited | East Yorkshire | 2003 |
| A.E. Willows & SON Limited | Newark | 1972 |
| A.E.Beckett and Sons(Rumbush)Limited | Birmingham | 1970 |
| A.E.Cheer Limited | Nr Boston | 1961 |
| A.E.Dennett & SON Limited | Spilsby | 1964 |
| A.E.Roberts(Fruitgrower & Nurseryman)Limited | Southampton | 1950 |
| A.F. Holmes (Eaton Bray) Limited | Dunstable | 1966 |
| A.F.Monk(Rookley)Limited | Stockbridge | 1960 |
| A.G Arborcare Ltd | Guildford | 2026 |
| A.G Farm Services Ltd | Maldon | 2025 |
| A.G. & D.M.Goulbourne Limited | Alcester | 1950 |
| A.G. Drew Electrical Limited | Thuxton | 2010 |
| A.G. Farms Limited | Stoke On Trent | 2010 |
| A.G. Hedges (Farms) Limited | Oxon | 1963 |
| A.G. Howick (Farmers) Limited | Nottingham | 1968 |
| A.G. Nicholson Limited | Barnsley | 2003 |
| A.G. Pennock Limited | Pickering | 1988 |
| A.G. Phillips & SON Limited | Waterlooville | 1981 |
| A.G. Sansum & Sons Limited | Bristol | 1977 |
| A.G.M. Systems Limited | Bishop'S Stortford | 1987 |
| A.G.Wright & Son,(Farms)Limited | Ely | 1950 |
| A.H. Cornish (Appleton) Limited | Appleton, Nr.Abingdon | 1955 |
| A.H. Livestock Services Limited | Southampton | 2013 |
| A.H. Mudd Agricultural Services Limited | Scarborough | 2006 |
| A.H. Slater & Co. Limited | Suffolk | 1974 |
| A.H.Brown(Hayling Island)Limited | Hayling Island | 1952 |
| A.H.Chantrell & Sons (Farmers) Limited | Meridian Business Park | 1958 |
| A.H.Dodd & Company (Engineers 2024) Ltd | Chippenham | 2024 |
| A.H.Hiller & SON Limited | Warwickshire | 1949 |
| A.H.Philpot & Sons Limited | Billericay | 1937 |
| A.Hemingway and Sons Limited | Sheffield | 1959 |
| A.Humphries & SON Limited | Liverpool | 1964 |
| A.I.T Livestock Ltd | Exeter | 2026 |
| A.I.Walgate & SON | Lincs | 1954 |
| A.J Thompson & Sons Ltd | Faversham | 2009 |
| A.J. Allan (Brechin) Limited | Angus | 1975 |
| A.J. Allan (Potato Merchants) Limited | Angus | 1980 |
| A.J. and J. Lake Limited | South Molton | 2009 |
| A.J. and R.G.Barber Limited | Shepton Mallet | 1955 |
| A.J. Bowring Cattle Limited | Mansfield | 2015 |
| A.J. Forster Limited | Penrith | 1999 |
| A.J. Grant Limited | Boston | 1973 |
| A.J. Groom & SON Limited | Tring | 2003 |
| A.J. Leese Turkeys Ltd | Nantwich | 2003 |
| A.J. Lloyd Limited | Norwich | 2009 |
| A.J. Maxwell Limited | Hertfordshire | 1948 |
| A.J. Mccallum Limited | Wells-Next-The-Sea | 2003 |
| A.J. Shorten Limited | Great Yarmouth | 1980 |
| A.J. Tweedie Limited | Dunbar | 1960 |
| A.J. Walker (Farm) Limited | Princes Risborough | 1983 |
| A.J. Wooldridge (West Peckham) Limited | Totnes | 1963 |
| A.J. Wooldridge Limited | Totnes | 1973 |
| A.J.B (Shetland) Limited | Inverurie | 2013 |
| A.J.E. Calder Limited | Berwickshire | 1956 |
| A.J.F.'s Big Company Limited | Matlock | 1996 |
| A.J.Gay & Sons Limited | Nr.Bristol | 1972 |
| A.J.Harris and Son(Farmers)Limited | Chesterfield | 1952 |
| A.J.Hart and SON Limited | Sandy | 1963 |