| KMG (South) Ltd | Horley | 2023 |
| KMG Farm Ltd | Omagh | 2015 |
| Kmlandscapingandbuilding Services Ltd | Hemel Hempstead | 2026 |
| KMR Rural Limited | Hitchin | 2026 |
| KMW Catching Services Limited | Driffield | 2026 |
| KMZ Ltd | London | 2019 |
| Knab Ltd. | Banff | 2006 |
| Knaggs & Waggs Ltd | Chester Le Street | 2024 |
| Knap Hill Nursery Limited | London | 1930 |
| Knaplock Limited | Taunton | 2008 |
| Knapp END Farm Limited | Worcester | 2014 |
| Knapp Farm Limited | Glastonbury | 2002 |
| Knapp Projects Ltd | Stroud | 2022 |
| Knaptoft Hall Farm Limited | Shrewsbury | 1999 |
| Knapton Farms Limited | Hull | 2003 |
| Knapton Limited | Hereford | 2015 |
| Knarsdale Estate Limited | London | 2013 |
| Kneesall Shoot Limited | Brigg | 2015 |
| Kneesworth Farms Ltd | Cambridge | 1999 |
| Kneller & Sons Ltd | Crediton | 2025 |
| Knight Agri Ltd | Medlam, Boston | 2011 |
| Knight Farming Limited | Dunmow | 2012 |
| Knight Land Management Ltd | Farnborough | 2010 |
| Knight-Tech Limited | Glasgow | 2010 |
| Knightley Farming Limited | Stafford | 2015 |
| Knighton Community Woodlands Group | Knighton | 2010 |
| Knighton Countryside Management Limited | Dorchester | 2004 |
| Knights Farms Limited | Norwich | 1992 |
| Knights Foods Limited | Norwich | 1998 |
| Knights Garth Eggs Ltd | Beverley | 2016 |
| Knights of Casterton Limited | Lynch Wood | 2001 |
| Knightsbridge Farms Limited | Alresford | 2008 |
| Knightsward Farm Limited | London | 1998 |
| Knightwake Farm Ltd | High Peak | 2025 |
| Knightwood Trust Farms Limited | Goole | 1996 |
| Knoakes Court Livestock Limited | Lugwardine | 2021 |
| Knockagh Poultry Limited | Carrickfergus | 2013 |
| Knockagh View Equestrian Centre Limited | Greenisland | 2019 |
| Knockando Fishings Limited | Aberdeen | 2024 |
| Knockando Forestry Limited | Aberdeen | 2026 |
| Knockdow Estates Management Ltd | Dunoon | 2017 |
| Knockenbaird Broilers Limited | Insch | 1991 |
| Knockfarrel Eco Lodges Limited | Inverness | 2025 |
| Knockhead Fishing Limited | Aberdeen | 2013 |
| Knockie Limited | Inverness | 2017 |
| Knockiehill Estates Ltd. | Aboyne | 2005 |
| Knockiehill Woodland Centre Ltd | Aboyne | 2021 |
| Knockin Calves Limited | Ellesmere | 2025 |
| Knockin EGG Farm Limited | Shropshire | 1949 |
| Knockin Growers Limited | Knockin, Oswestry | 2015 |
| Knocknagael Limited | Inverness | 2020 |
| Knocknain Developments Limited | Stranraer | 2010 |
| Knockothie Farms | Aberdeenshire | 2000 |
| Knockour Farm Ltd | Newport | 2019 |
| Knockraine Farms Limited | Belfast | 1996 |
| Knoll (Somerset) Ltd | Chippenham | 2019 |
| Knoll and Oak Tree Farms Limited(The) | Evesham | 1962 |
| Knoll Gardens Limited | Wimborne | 2012 |
| Knolton Hall Limited | Nantwich | 2016 |
| Knotend Ltd | Oldbury | 2025 |
| Knotfield Vines Ltd | Leeds | 2021 |
| Knotts of Tempsford Ltd | Dunstable | 2023 |
| Knowbury Farmers Ltd | Pershore | 2021 |
| Knowehead Poultry Limited | Ballymena | 2018 |
| Knowle (Bristol) Angling Association Limited | Bristol | 2003 |
| Knowle Hill Limited | Stratford Upon Avon | 2021 |
| Knowle Tree Services Limited | Totnes | 2008 |
| Knowledge Enterprise for Project Management Ltd | Ruislip, | 2023 |
| Knowles Farm Equestrian & Agricultural Services Ltd | Dronfield | 2012 |
| Knowles Farming Limited | York | 2007 |
| Knowles Poultry Limited | Ballymena | 2020 |
| Knox Poultry Sales Limited | Dungannon | 2018 |
| Knoydart Community Garden CIC | Mallaig | 2026 |
| Knoydart Farm CIC | Mallaig | 2023 |
| Knoydart Tree Nursery CIC | Mallaig | 2022 |
| Knutsford K9 Ltd | Congleton | 2019 |
| KO2 Limited | London | 2000 |
| Koba K9 Academy Ltd | Huddersfield | 2022 |
| KOC Ltd | Waterlooville | 2024 |
| Kodiak Forestry & Groundworks Ltd | Isle Of Mull | 2021 |
| Kohjenta Limited | Telford | 2006 |
| KOI Water Barn Limited | London | 2002 |
| KOI Water Garden Limited | Princes Risborough | 1997 |
| Koko Wonder Europe Limited | Northwich | 2025 |
| Komainu Bengals Ltd | Basingstoke | 2025 |
| Komatsu Forest Limited | Carlisle | 1996 |
| Komcept Solutions Ltd. | Northampton | 2001 |
| Kong Bloodstock Ltd | Bath | 2024 |
| Konstellation Ltd | Glasgow | 2022 |
| Kookaburra Environmental Ltd | Hetton Le Hole | 2016 |
| Koop and Kiln Ltd | Swansea | 2024 |
| Kopros Limited | Hook | 1993 |
| Korean Natural Farming UK Limited | Southminster | 2025 |
| Koremade Ltd | Bridgend | 2025 |
| Koster Contractors Ltd | Witney | 2024 |
| Koudijs Animal Nutrition Ltd | March | 2010 |
| KP O'Kane | Londonderry | 2010 |
| Kraken Fishing Company Ltd | Shetland | 2022 |
| Kreeft Fishing Ltd | Fraserburgh | 2019 |
| Krisaro Ltd | Carshalton | 2025 |