| KC Shellfish Ltd | Fraserburgh | 2025 |
| KCA Buchan Ltd | Fraserburgh | 2022 |
| KCG Enterprises Ltd | Warwick | 2013 |
| KCJ Fishing Limited | Brixham | 2012 |
| KCP Equestrian Ltd | Bracknell | 2024 |
| KCS Agri Limited | Cheltenham | 2021 |
| KCS Agriculture Limited | Cleator Moor | 2020 |
| KD Agri Ltd | Newry | 2025 |
| KD Fishing Ltd | Eastbourne | 2025 |
| KD International Foods Limited | Peterborough | 2024 |
| KD Shepherding Limited | Salisbury | 2024 |
| KDA Ferguson Ltd | Ballymena | 2026 |
| KDB Office Services Ltd | Braintree | 2021 |
| Kdfc Limited | Enniskillen | 2011 |
| KDK Farm Limited | Dumfries | 2024 |
| KDM Contracting Limited | Perth | 2010 |
| KDP Enterprises Ltd | Llanfyrnach | 2005 |
| KE & J Sparkes Ltd | Preston | 2014 |
| KEA Contractors Limited | Truro | 2006 |
| KEA Haulage and Plant Limited | Truro | 2019 |
| Keane Equestrian Ltd | Sevenoaks | 2026 |
| Keano's Animal Club Limited | Tilbury | 2019 |
| Kearl Farming Limited | London | 2025 |
| Kearney Fishing Ltd | Newry | 2008 |
| Kearney Trawlers Ltd | Co Down | 2007 |
| Kearsley Equine Services Ltd | Uckfield | 2024 |
| Kebister Agricultural Limited | Shetland | 1994 |
| Kedzlie Farm Limited | Lauderdale | 2011 |
| Keeble Brothers (Agricultural) Limited | Burnham On Crouch | 2010 |
| Keeble Cottage Equestrian Centre Ltd | Huntingdon | 2022 |
| Keeklemere Limited | Workington | 2008 |
| Keele Dairies Limited | Newcastle-Under-Lyme | 2018 |
| Keenaghan Mushrooms Ltd | Dungannon | 2012 |
| Keenan & Co Construction Ltd | Armagh | 2019 |
| Keepers Lodge Clay Shoot Limited | Usk | 2008 |
| Keepers Nursery Limited | Maidstone | 2023 |
| Keepers Pest Control Ltd | Aylesbury | 2017 |
| Keeplan Ltd | Alcester | 2017 |
| Keggall Farms Ltd | Newry | 2023 |
| Kegworth K9 Ltd | Derby | 2024 |
| Kehelland Horticultural Centre Limited | Camborne | 1983 |
| Kehoe Equestrian and Cattery Ltd | Ormskirk | 2026 |
| Kehosa Reforestation Limited | West Malling | 2025 |
| Keighley Tree Services Limited | Keighley | 2001 |
| Keila Fishing Company Limited | Glasgow | 1999 |
| Keillour Farms Limited | Perth | 2025 |
| Keir & Cawder Limited | Stirling | 1947 |
| Keirsbeath Farm Limited | Fife | 1953 |
| Keisby Estate Limited | Lincolnshire. | 1991 |
| Keith Archers Tree Care Specialists Limited | Billericay | 1999 |
| Keith Carr (Farmers) Limited | Wellingborough | 1959 |
| Keith Case Limited | Chipping | 2005 |
| Keith Dalgleish Racing Limited | Glasgow | 2012 |
| Keith Farms Limited | Dereham | 1997 |
| Keith Hall & SON Ltd | Spalding | 2025 |
| Keith Harte Bloodstock Limited | Abingdon | 2011 |
| Keith Langmead (Arundel) Limited | West Sussex | 1950 |
| Keith Langmead (Poling) Limited | Arundel West Sussex | 1955 |
| Keith Langmead Limited | Near Arundel | 1988 |
| Keith Mccullough Fishing Company Limited | Newry | 2011 |
| Keith Mount (Liming) Limited | Bury St. Edmunds | 1992 |
| Keith Munro Ltd. | Tain | 2016 |
| Keith Newlands Limited | Haltwhistle | 2026 |
| Keith Pegden Contracting Limited | Basingstoke | 2019 |
| Keith Shore Limited | Nantwich | 2005 |
| Keith Summers Ltd | Taunton | 2012 |
| Keith Truett Agronomy Ltd | Folkestone | 2017 |
| Keith Warren Installations Limited | Driffield | 2019 |
| Keithhill Cattle Company Limited | East Lothian | 2002 |
| Keithick Farms Limited | Perthshire | 1963 |
| Keithinch Fishing Limited | Peterhead | 2024 |
| Keki's Guinea PIG Rescue CIC | Basingstoke | 2025 |
| Keki’S Guinea Pigs Ltd | Basingstoke | 2024 |
| Kekno Limited | Hall Green | 2005 |
| Keldhead Brick Company Limited | Crawley | 1972 |
| Kelevra Solutions Limited | Tyne & Wear | 2007 |
| Kelk Farming Co. Ltd | Driffield | 2011 |
| Kelland Dairy Limited | Crediton | 2003 |
| Kellitcreed Showdogs Limited | Crewe | 2024 |
| Kellstown Farm Limited | Ballymena | 2023 |
| Kelly Earthmoving Limited | Belfast | 2011 |
| Kelly Hatcheries Limited | Danbury. Essex | 1973 |
| Kelly Turkey Breeders Limited | Essex | 1979 |
| Kelly Turkey Farms Limited | Danbury | 1980 |
| Kelly's Donkeys Ltd | Frome | 2020 |
| Kelly's Pet Services Ltd | Wakefield | 2021 |
| Kellybronze Scotland Limited | Chelmsford | 1997 |
| Kelly’S KOI Limited | Doncaster | 2026 |
| Kelmar Contracting Ltd | Annan | 2021 |
| Keloupa Fishing Company Ltd | Tingwall | 2012 |
| Kelp Blue Biotech UK Ltd | West Malling | 2023 |
| Kelp Blue Stipe Limited | West Malling | 2020 |
| Kelp Canaveral Limited | Oban | 2023 |
| Kelpai Limited | Belfast | 2026 |
| Kelpcrofters Ltd | Plockton | 2020 |
| Kelpsmiths Ltd | Hartley Wintney | 2020 |
| Kelsale Hall Shoot Ltd | Saxmundham | 2020 |
| Kelsall Forestry Ltd. | Chester | 2000 |
| Kelsey Farms Limited | Canterbury | 2003 |
| Kelsey House Doodles Limited | Hull | 2022 |