| James and Hughes Ltd | Talybont | 2020 |
| James and Jean Potter Limited | Welshpool | 2019 |
| James B Third JNR Limited | Fraserburgh | 2003 |
| James Barr & SON (Engineering) Limited | Chelmsford | 1952 |
| James Barr & Sons (Farmers) Limited | Ipswich | 1952 |
| James Baxter Limited | Nuneaton | 1963 |
| James Blake Farriery Ltd | East Harling | 2024 |
| James Bolton Agricultural Contracting Ltd | Glastonbury | 2007 |
| James Boulton Services Ltd | Crewe | 2021 |
| James Bros.,(Milford Haven)Limited | Milford Haven | 1957 |
| James Brothers Enterprises Limited | Haverfordwest | 2004 |
| James Burke Limited | Altrincham | 2016 |
| James Burnett Limited | Newark | 2018 |
| James Cargill (Norton Farms) Limited | Norwich | 1951 |
| James Clowes Limited | Hinckley | 2005 |
| James Coburn Farriers Ltd | Mildenhall | 2014 |
| James Coles & Sons (Nurseries) Limited | Leics | 1977 |
| James Constance & Sons Limited | Newent | 1949 |
| James Cookson Livestock Limited | Kendal | 2014 |
| James Cooper (Construction) Limited | London | 1945 |
| James Craggs Equine Services Ltd | Sheffield | 2026 |
| James Craik & Son(Whitehaugh)Limited | Alford | 1961 |
| James Cubitt Industrial Ltd | London | 2018 |
| James D Baird (Home Farm) Limited | Exeter | 2007 |
| James Davey Hoof Trimming Ltd | Saltash | 2024 |
| James David Forestry Ltd | London | 2026 |
| James Dick (Farming) Limited | Livingston | 1958 |
| James Drennan (Balgracie) Limited | Stranraer | 1962 |
| James Duffus | Aberdeenshire | 1983 |
| James Evans Farming Ltd | Montgomery | 2021 |
| James F Gillanders | Aberdeenshire | 1985 |
| James Fairley & Sons (Farms) Limited | Clacton On Sea | 1952 |
| James Fairnie & Sons Limited | Dunbar | 2011 |
| James Farms and Consultancy Limited | Chesterfield | 2012 |
| James Findlay Ltd | Forfar | 2026 |
| James Finlay Limited | Aberdeen | 1909 |
| James Forrest Agricultural Contractors Limited | Ayrshire | 2005 |
| James Foskett Contracts Limited | Ipswich | 2016 |
| James Foskett Farms Limited | Ipswich | 2004 |
| James Gammell & SON Limited | Edinburgh | 1964 |
| James Gardner Limited | Lancashire | 2002 |
| James Grant (Farmers) Limited | Boston | 1973 |
| James H. Tennant Limited | Bridlington | 1987 |
| James H.Neill & Sons (Thurgarton) Limited | Norwich | 1959 |
| James Hall & Sons Ltd | Alnwick | 2012 |
| James Harris Fishing Ltd | Thurso | 2026 |
| James Harrison Farming Ltd | Chester | 2010 |
| James Hartley (Poppylot Farms) Limited | King'S Lynn | 1957 |
| James Heath & Sons Limited | Telford | 1961 |
| James Hutchings Limited | Chippenham | 2005 |
| James Jardine Longtown Limited | Carlisle | 2009 |
| James L. Scobie Deer Management Ltd | Motherwell | 2015 |
| James Lawrie Farming | Newbridge | 2025 |
| James Ledger Estates Limited | Chatham | 1997 |
| James Mahon & Sons Limited | Stratford Upon Avon | 1963 |
| James Marr Limited | Cardiff | 2016 |
| James Marshall Consulting Ltd | Corwen | 2021 |
| James Mcarthur & SON Ltd. | | 2004 |
| James Mckee Coffey & Sons Fishing Ltd | Co Down | 2006 |
| James Measures Limited | Bourne | 1956 |
| James Miles Fishing Ltd | Ramsgate | 2025 |
| James Millar (Kilduff) Limited | North Berwick | 1963 |
| James Miller (Kelham) Limited | Newark | 2004 |
| James Mitchell & SON Ltd. | Prestwick | 2004 |
| James Mortimer,Limited | Driffield | 1927 |
| James O'Rawe | Ballymena | 2019 |
| James O. Jack & SON Limited | Airdrie | 2003 |
| James Ortega Bloodstock Limited | Cambridge | 2014 |
| James P Dixon Limited | Diss | 2012 |
| James Penybank Ltd | Welshpool | 2026 |
| James Pettigrew (Farms) Limited | Glasgow | 1996 |
| James Pirie & Sons Limited | Argyll | 1931 |
| James Poultry Ltd | Builth Wells | 2025 |
| James R Ferguson Limited | Wigtownshire | 2005 |
| James Rodger and SON Ltd | Norwich | 2005 |
| James S. Robertson & SON Limited | Cupar | 1959 |
| James Scott & Company (Fearn) | Tain | 1961 |
| James Scott Services Limited | Nuneaton | 2012 |
| James Skipper Contracting Ltd | Ellesmere | 2024 |
| James Smith Fishing Limited | Arbroath | 2017 |
| James Standen Racing Ltd | Ambleside | 2026 |
| James Stephen Fishing Ltd | Peterhead | 2020 |
| James Stockdale Limited | Bridlington | 1955 |
| James Straughan & Sons Limited | Berwick-Upon-Tweed | 1925 |
| James Sutton Farming Company Limited | Peterborough | 1953 |
| James Tainsh & SON Ltd | Comrie | 2021 |
| James Tennant 1992 Limited | Bridlington | 1992 |
| James Thomas (Merthyr) Limited | Brecon | 1976 |
| James Vallance Fleming Limited | Leven | 1973 |
| James Ward & Sons (N.I.) Limited | Hillsborough, | 1973 |
| James Winter Sport Horses Limited | Tarporley | 2019 |
| James Woof Ltd | Sedbergh | 2020 |
| James Wray Farms Ltd | Limavady | 2016 |
| Jamesland Farm Ltd | Newry | 2017 |
| Jamesrickard@Bhf Limited | Taunton, Somerset | 2020 |
| Jamiain Fishing Ltd | Isle Of Skye | 2025 |
| Jamie Baillie Shellfish Limited | Oban | 2017 |
| Jamie Hawkins Limited | Taunton | 2020 |
| Jamie Lloyd Bloodstock Limited | Warwick | 2012 |
| Jamie Piggott Bloodstock Ltd | Cambridge | 2018 |