| Jones & Harker Limited | Crewe | 2025 |
| Jones & Jones Limited | Peterborough | 1948 |
| Jones Berain CYF | Denbigh | 2003 |
| Jones Bros. Ruthin (Farms) Co. Limited | Ruthin | 1985 |
| Jones Brothers Limited | Carmarthen | 2008 |
| Jones Farming Ltd | Porthmadog | 2025 |
| Jones Fencing Limited | Alnwick | 2014 |
| Jones Food Company Limited | London | 2016 |
| Jones Forestry and Timber Limited | Halstead | 2024 |
| Jones Forestry Ltd | Worcester | 2019 |
| Jones Land Holdings Ltd | Rotherham | 2024 |
| Jones Marine Enterprises Limited | Brixham | 2018 |
| Jones Trawlers Limited | Fleetwood | 2012 |
| Jones Tree Specialists Ltd | Chertsey | 2024 |
| Jones Trelay Ltd | Camelford | 2021 |
| Joniroke Enterprises Limited | Nottingham | 1973 |
| Jonita Limited | Dorking | 1992 |
| Jonny Dymond Ltd | Callington | 2025 |
| Jonny Farms Ltd | London | 2013 |
| Jontor Engineering Limited | Horley | 1976 |
| Joplings Tree Services Ltd | Barnard Castle | 2022 |
| Jordan & Sons Farm Ltd | Neath | 2022 |
| Jordan Gilbertson Farriery Ltd | Bristol | 2026 |
| Jordan James ARB Ltd | Nottingham | 2025 |
| Jordan Tree Surgery Limited | Waterlooville | 2013 |
| Jordan's Farm Environmental Ltd | Colchester | 2022 |
| Jordan's Kennels Ltd | Burton On Trent | 2019 |
| Jordans Farms Limited | Ilminster | 2011 |
| Jorem Limited | Fraserburgh | 2003 |
| Jorth Consult Limited | Ashbourne | 2001 |
| Jorvik Estate Co. Limited | York | 2023 |
| Joseph a D Wright Ltd | Norwich | 2019 |
| Joseph Beasley & Sons Limited | Nr Birmingham | 1960 |
| Joseph Black & Son,Limited | Scunthorpe | 1951 |
| Joseph Camm Farms Limited | Retford | 1962 |
| Joseph Charles Gerard Mcevoy Ltd | Banbridge | 2025 |
| Joseph E.Swiers,Limited | Helperby York | 1960 |
| Joseph Eeley & SON Limited | Oxon | 1964 |
| Joseph Enterprises Limited | Swindon | 2008 |
| Joseph Fordham & Sons Limited | Saffron Walden | 1958 |
| Joseph Holden & Sons Limited | London | 1919 |
| Joseph Morton Ltd | Moira | 2018 |
| Joseph Nickerson Ltd | Lincs | 1972 |
| Joseph Parr Racing Ltd | Newmarket | 2019 |
| Joseph Rochford Gardens Limited | Hertfordshire | 1974 |
| Joseph Rochford Holdings Ltd | Luton | 2018 |
| Joseph Torr Limited | Macclesfield | 1961 |
| Joseph Weaver Ltd | Coleford | 2023 |
| Joseph Whattoff & Sons (Farms) Limited | Cambs | 1980 |
| JOSEPH1927 Ltd | London | 2023 |
| Josh Eddleston Registered Farrier Ltd | Langho, Blackburn | 2017 |
| Josh Higgins Countryside Services Limited | Wem | 2022 |
| Josh Owen Tree and Garden Services Ltd | Haverfordwest | 2023 |
| Josh the Logger Ltd | Preston | 2025 |
| Joshb Ltd | Banff | 2019 |
| Joshua Cottam Farriery Limited | South Molton | 2018 |
| Joshua Hosier and SON Limited | Marlborough | 1963 |
| Joshua Thornber Limited | Clitheroe | 2024 |
| Joshua Tree Services Ltd | Abergavenny | 2020 |
| Joshvic Fishing Company Ltd | Lancaster | 2019 |
| Josim Limited | | 2004 |
| Joslin DYE Ltd | Farnham | 2021 |
| Jovern Marine Limited | St. Austell | 2013 |
| Jovern Offshore Ltd | Looe | 2024 |
| Jowal Golden Retrievers Ltd | Wotton-Under-Edge | 2023 |
| Joy Book W Ltd | Cardiff | 2021 |
| Joyacres Park Limited | Bournemouth | 2009 |
| Joylan Farms Limited | Carlisle | 2006 |
| Jo’S Jaunts Ltd | Northallerton | 2025 |
| JP & AJ Gill Limited | York | 2011 |
| JP & D Farms Ltd | Newry | 2024 |
| JP & JA Davies Farms Limited | Hereford | 2004 |
| JP Agri Limited | Cullompton | 2012 |
| JP Agricultural Limited | Nottingham | 2024 |
| JP Farming Services Limited | Sittingbourne | 2018 |
| JP Livestock Ltd | Glengormley | 2024 |
| JP Morris Limited | York | 2012 |
| JP Rural Services Ltd | Leicester | 2025 |
| JP Timber Limited | Malton | 2022 |
| JP2026 Limited | Chippenham | 2026 |
| JPB Contractors Ltd | Coleshill | 2022 |
| JPD Engineering (Southwell) Limited | Lincolnshire | 2007 |
| JPE & KR Brunt Ltd | Chippenham | 2011 |
| JPP Agri Limited | Hexham | 2025 |
| JPS Farms Limited | Chelmsford | 2018 |
| JPS Leicester Ltd | Leicester | 2021 |
| JPT Reed & SON Ltd | Colyton | 2025 |
| JPW Watson Limited | Filey | 2016 |
| JR & EH Nott Limited | Sudbury | 2016 |
| JR & GI Young Ltd | Castlederg | 2014 |
| JR Cowie Limited | Fraserburgh | 2018 |
| JR Farms Limited | Enniskillen | 2015 |
| JR Mcgarva Ltd | Leeds | 2007 |
| JR Transport & Sales Ltd | Newton Abbot | 2025 |
| JR Tree Services Ltd | Carlisle | 2015 |
| JR Wilson Tree Specialist Limited | Sevenoaks | 2010 |
| Jr.Timber Services Ltd | Fordingbridge | 2020 |
| JRB Farm Ltd | Umberleigh | 2019 |
| JRB Farming Ltd | Kelso | 2023 |
| JRB Rural Services Ltd | Tamworth | 2026 |