| C. M. Fisheries Ltd | Gillingham | 2009 |
| C. Melhuish Ltd | Ware | 2024 |
| C. Orchard Collective Ashburton Limited | Ashburton | 2011 |
| C. P. Tree Services Limited | Newton Abbot | 2015 |
| C. S. Gent & Sons Limited | Wisbech | 2008 |
| C. S. Snowdon Ltd | York | 2013 |
| C. Slooten Limited | Lincolnshire | 1950 |
| C. Stubbs and SON Limited | Nr. Ripon, | 1955 |
| C. T. Sheldon Limited | Newark | 1975 |
| C. Thomas Farming Ltd | Southport | 2009 |
| C. W. J. Fall & Sons Limited | Yorkshire | 1973 |
| C. Wright (Farmers) Limited | Boston, | 1949 |
| C.& R.Needham Limited | Boston | 1964 |
| C.A. Jones Limited | Carmarthen | 2010 |
| C.A. Powell Farms Limited | Bristol | 1975 |
| C.A. Skellern and Sons Limited | Kidderminster | 1964 |
| C.A. Strawson & SON Limited | Newark | 2001 |
| C.A. Strawson Farming Limited | Newark | 2020 |
| C.A. Strawson Maplebeck Limited | Newark | 2020 |
| C.A.Briggs & Sons Limited | North Lincolnshire | 1954 |
| C.A.Lewis | King'S Lynn | 1957 |
| C.A.R. & J.M. Stubbs Ltd | Louth | 2016 |
| C.A.R. Agrar Ltd | Manchester | 2023 |
| C.B.Arnold Limited | North Walsham | 1970 |
| C.B.Morgan (Farmers King's Somborne) Limited | Stockbridge | 1961 |
| C.Bower & Sons Limited | Hyde | 1926 |
| C.C. Cousland & SON Limited | Sleaford | 1979 |
| C.C. Jenkinson & Co. Limited | | 1973 |
| C.C. Reed & Company Limited | Bridlington | 1965 |
| C.C.Boggis Limited | Southwold | 1948 |
| C.C.L. Equestrian Ltd | Farnborough | 2022 |
| C.D. James Ltd | Halstead | 2002 |
| C.D. SLY Limited | Spalding | 2019 |
| C.E. Barnes & Sons (Wareham) Limited | Wareham | 1972 |
| C.E. Broomfield Limited | Dartford | 1945 |
| C.E. Caldwell (Norlands Farm) Limited | Cheshire | 1954 |
| C.E. Davidson Farms Ltd. | Eye | 1997 |
| C.E. Davis & Company (Marshfield) Limited | Bath | 1943 |
| C.E. Wing (Farmers) Limited | Wisbech | 1956 |
| C.E.B.Draper and SON Limited | Nr Shrewsbury | 1947 |
| C.E.Murch Limited | Chatham | 1949 |
| C.E.Richardson Limited | Spalding | 1954 |
| C.E.Rudge and Sons Limited | Nr Ross-On-Wye | 1951 |
| C.E.W. Saunders (Odiham) Limited | Hampshire | 1963 |
| C.F. Edge & Partners Limited | Ashbourne | 2002 |
| C.F. Harrison Limited | Spalding | 1962 |
| C.F.Banks Limited | Lincoln | 1962 |
| C.F.Beal (Yedingham) Limited | Malton | 2013 |
| C.F.Case & Co.Limited | Kings Lynn | 1954 |
| C.F.Vigus Limited | Ware | 1964 |
| C.G. Kendall Limited | York | 2016 |
| C.G. Musson and Sons Limited | Lynch Wood, Peterborough | 1981 |
| C.G.Burton & SON Limited | Newark | 1965 |
| C.H. & E.I. Bambridge & Sons Limited | Thetford | 2001 |
| C.H. & P.C. Corbett Limited | Axminster | 1992 |
| C.H. Crust (Farms) Limited | Horncastle | 1978 |
| C.H. Ellis Limited | Polegate | 1962 |
| C.H. Greensit Limited | Ripon | 1983 |
| C.H. Scholey & Sons Limited | Nr Doncaster | 1956 |
| C.H. Tomkins Limited | Kettering | 1992 |
| C.H.Bennion & Sons Limited | Corby | 1964 |
| C.H.Curbishley(Farms)Limited | Congleton | 1958 |
| C.H.Hollis Limited | Oakham | 1944 |
| C.J. Ashmead Limited | Stroud | 1977 |
| C.J. Farms Limited | Grantham | 1996 |
| C.J. Fountain & SON Ltd | Whittlesey | 1979 |
| C.J. Harker & Associates Ltd | Keighley | 2008 |
| C.J. Hempsall & Sons Limited | Newark | 1940 |
| C.J. Hooper and Sons Limited | Dorchester | 1961 |
| C.J. Jackson & Sons Limited | Horsham | 1971 |
| C.J. Luff Limited | Alton | 2003 |
| C.J. Montgomery Limited | Minster | 1988 |
| C.J.Ashby Forestry Limited | Maldon | 2011 |
| C.J.Ashby Timber Haulage Limited | Maldon | 2017 |
| C.J.C. LEE (Saxthorpe) Limited | Norwich | 1954 |
| C.J.Neale Limited | Nottingham | 1958 |
| C.K. Hanson & SON Limited | Bradford | 1979 |
| C.K.& D.Muir Limited | Saltburn | 1964 |
| C.Lumley & Sons Limited | Malton | 1955 |
| C.M Tree Care Limited | Darlington | 2017 |
| C.M.& G.W.Goacher Limited | Retford | 1961 |
| C.M.D Farm Limited | London | 2023 |
| C.M.M. Bloodstock Limited | Cowbridge | 2004 |
| C.N. Flack & Co. Limited | Norwich | 1950 |
| C.N. Overton Limited | Lincoln | 1974 |
| C.N. Spencer Limited | Kettering | 1920 |
| C.N. Starling Limited | Ely | 1954 |
| C.N.Beck & Sons Limited | Norwich | 1961 |
| C.N.Wadlow Limited | Bridgnorth | 1959 |
| C.P. Button Limited | Bodmin | 1980 |
| C.P.Bolland & SON Limited | Kingswinford | 1960 |
| C.P.Richards & SON Limited | Hayle | 1960 |
| C.P.Rudge & Sons,Limited | Portsmouth | 1960 |
| C.Patchett & Son(Lincs.)Limited | Grimsby | 1957 |
| C.R. Cawston Limited | Bungay | 1961 |
| C.R. Chapman (Blois Hall) Limited | Ripon | 1977 |
| C.S. Backhouse Limited | Goole | 2007 |
| C.S. Hunt & SON (Enham) Limited | Andover | 1958 |
| C.S. Willett & Co. Limited | Birchington | 1977 |
| C.T. Brown & Co. Limited | Fakenham | 1988 |