| J C & S K Williams Ltd | Ashford | 2020 |
| J C Agriculture Limited | Hitchin | 2012 |
| J C Bell Limited | Cupar | 2008 |
| J C Burkinshaw Agricultural Contractor Ltd | Huddersfield | 2025 |
| J C C J Limited | Nottingham | 2001 |
| J C Evans Limited | Newtown | 2013 |
| J C Frost & Co Limited | Diss | 2020 |
| J C Lees Limited | Clitheroe | 2006 |
| J C M Services Amenity and Groundcare Limited | Chelmsford | 2019 |
| J C Macneil Fishing Ltd | Stornway | 2009 |
| J C Metcalf Agricultural and Fencing Contracting Limited | Preston | 2019 |
| J C Pursehouse Ltd | Bury St. Edmunds | 2023 |
| J C Smith Farm Ltd | Wells | 2022 |
| J C Trees Ltd | Wetherby | 2014 |
| J C Watson and SON Limited | North Yorkshire | 2002 |
| J Cannon Limited | Appleby-In-Westmorland | 2018 |
| J Corr Contracts Ltd | Enniskillen | 2023 |
| J Cossins & Sons Limited | Bournemouth | 1960 |
| J Crawford Farrier Ltd | Cupar | 2022 |
| J Curnick & SON Ltd | Salisbury | 2005 |
| J D Agricultural Limited | Newcastle Upon Tyne | 2018 |
| J D European Horses Limited | Chester Le Street | 2008 |
| J D Forestry & Land Management Ltd | Newton Abbot | 2022 |
| J D Hamilton Farms Limited | Bathgate | 2014 |
| J D Holland Contracting Ltd | Litlington | 2025 |
| J D Hoof Care Ltd | Shrewsbury | 2020 |
| J D Hunter Farming Limited | Cambridge | 2020 |
| J D Mcburney Limited | Dumfries | 2009 |
| J D Megginson & SON Ltd | York | 2019 |
| J D Staffing Limited | Spalding | 2021 |
| J D Whitaker Ltd | Scarborough | 2023 |
| J D Wright & SON Ltd | Chippenham | 2009 |
| J D Young Contracting Limited | New Cumnock | 2025 |
| J Dalton & SON Limited | Penrith | 2008 |
| J David Levett & Sons Limited | Yeovil | 2006 |
| J Down Contracting Limited | North Newton | 2012 |
| J Drinkall Limited | Chorley | 2002 |
| J Duckitt & Sons Limited | Doncaster | 2005 |
| J Duncan Limited | Dundee | 2023 |
| J Durrant & Family Ltd | Romford | 2023 |
| J E & N M Vickery Limited | Yeovil | 2006 |
| J E B Farriery Services Ltd | Barnet | 2016 |
| J E Bell & SON Limited | York | 2010 |
| J E Broster & SON Limited | Wirral | 2017 |
| J E C Lawrence West Hall Farm Limited | Yeovil | 2019 |
| J E Cheer Farming Ltd | Market Rasen | 2016 |
| J E Clarke Farms Limited | Gloucester | 2022 |
| J E Dale (Farmers) Limited | Market Rasen | 2002 |
| J E Harvey & Sons Limited | Snailwell | 2018 |
| J E Jones & SON Milling Limited | Powys | 2007 |
| J E Kelly & Sons Limited | Omagh | 2000 |
| J E Spence & SON Farms Ltd | Skegness | 2012 |
| J Evans Forestry Contracts Ltd | Dursley | 2024 |
| J F & J Barrow Limited | Preston | 2015 |
| J F & J Edwards & Sons Unlimited | Boston | 2003 |
| J F Dallyn Limited | Newport | 2012 |
| J F H Farming Limited | Hailsham | 2017 |
| J F Lander Limited | Swanage | 2002 |
| J F Ratcliff Farms Limited | Bury St. Edmunds | 2019 |
| J F Rowson & Sons (Farmers) Limited | Skegness | 1966 |
| J F Smith & SON Farms Limited | Spilsby | 2021 |
| J F T Clark Limited | Norfolk | 1998 |
| J F Tree Specialist Limited | Colchester | 2012 |
| J Fisher (Agri) Limited | Goole | 1995 |
| J Flatt Contracting Ltd | Bury St. Edmunds | 2024 |
| J Freeman Contractors Ltd | Taunton | 2016 |
| J G Cattle Services Limited | Matlock | 2015 |
| J G Evison Limited | Driffield | 2016 |
| J G Farm Supplies Ltd | Rugeley | 2015 |
| J G I Ltd | Shetland | 2018 |
| J G Porter Limited | Lincoln | 2012 |
| J G Smith & R J Staveley Ltd | Clitheroe | 2015 |
| J G Smith (Filey) Limited | Filey | 2017 |
| J G Warhurst Limited | Lancashire | 2002 |
| J G Waterhouse Limited | York | 2021 |
| J Gale Farming Limited | Retford | 2019 |
| J Gatt Fishing Ltd | Banff | 2025 |
| J Gilvear Livestock Ltd | Stirling | 2015 |
| J Gordon Forestry & Arboriculture Ltd | Waterlooville | 2018 |
| J Gorwyn Limited | Heathfield | 2011 |
| J Greenwood Limited | Lancaster | 2008 |
| J H & N J Foxon Limited | Rugby | 2017 |
| J H & R Frost Limited | Axbridge | 2007 |
| J H Agriculture Limited | Bristol | 2004 |
| J H Barker and Sons Limited | Hoddesdon | 2017 |
| J H Boynton & SON (Farm) Ltd | Bridlington | 2014 |
| J H Duffin & Sons (Contractors) Limited | Melton Mowbray | 2007 |
| J H Equine Ltd | Southampton | 2022 |
| J H Evans Ltd | Aberystwyth | 2026 |
| J H Farming Limited | Driffield | 2008 |
| J H Farrier Services Ltd | Minehead | 2023 |
| J H Farriers Ltd | Southampton | 2014 |
| J H G Agri Services Ltd | Lincoln | 2024 |
| J H Lavery Ltd | Southsea | 2025 |
| J H M Dods Ltd | Ripon | 2025 |
| J H Pitts & Sons Ltd | Heathfield | 2011 |
| J H Remedial Ltd | Southampton | 2014 |
| J H Skepper & SON Limited | Sheffield | 2008 |
| J H Tree Care Ltd | Sheffield | 2025 |
| J H Vaudrey & SON (E.A.) Limited | Eye | 2005 |