| Kinvara (Agri) Ltd | Whitland | 2024 |
| Kinzere Limited | Berkshire | 2005 |
| Kipson Bank Farm | Bognor Road Chichester | 1958 |
| Kirakgate Shop Limited | Cardiff | 2025 |
| Kirby & Co Estates Ltd | Edinburgh | 2021 |
| Kirby Cattle Services Limited | Tarporley | 2020 |
| Kirby Wold Farming Ltd | Malton | 2021 |
| Kircal Woodlands Ltd | Coldstream | 2018 |
| Kirdana Ltd. | Aberdeenshire | 2006 |
| Kiri Group Limited | London | 2025 |
| Kirk Leedham Ltd | Melton Mowbray | 2019 |
| Kirkbarrow Hall Limited | Penrith | 2013 |
| Kirkbragg Limited | Preston | 2018 |
| Kirkby Computers Ltd | York | 2005 |
| Kirkby Contracting Limited | Lancaster | 2012 |
| Kirkeiven Ltd | Eyemouth | 2009 |
| Kirkella Limited | Ferriby Road Hessle | 1999 |
| Kirkham Farms (Warwick) Limited | Warwick | 1991 |
| Kirkhill Hughes Limited | Chester | 1979 |
| Kirkland Contracting & Shotblasting Ltd | Melton Mowbray | 2014 |
| Kirkland Estate Services Limited | London | 2015 |
| Kirkland Farming Company Limited | Dumfries | 2018 |
| Kirkland Farms Ltd | Dungannon | 2013 |
| Kirklington Farms Limited | Nottinghamshire | 1986 |
| Kirkman Equestrian Limited | Peterhead | 2025 |
| Kirkpatrick Farming Limited | Dumfries | 2013 |
| Kirkton Trading Limited | Strathcarron | 2014 |
| Kirminnoch Farms Ltd | Stranraer | 2015 |
| Kirn Ltd | Fort William | 2011 |
| Kiroan Limited | Fraserburgh | 2006 |
| Kirstie Clarke Dressage Limited | Preston | 2024 |
| Kirsty Aird Equestrian Ltd | Stirling | 2022 |
| Kirsty IMM Dressage Limited | Kidderminster | 2018 |
| Kirtlington Stud Limited | Kidlington | 1964 |
| Kirton Farmers (Notts) Limited | Mansfield, | 1974 |
| Kirton Farming Limited | Ipswich | 2009 |
| Kirvennie Limited | Newton Stewart | 2026 |
| Kismet Canine Ltd | Derby | 2025 |
| Kissing Gate Wildlife Limited | Leighton Buzzard | 2026 |
| KIT Hill Castle Farm Ltd | Callington | 2023 |
| KIT Speakman (Braxted) Limited | Witham | 2001 |
| Kitcat Limited | Dorchester | 1996 |
| Kitesfield Estates Limited | Milton Ernest | 2023 |
| Kitkat's Café Ltd | Kings Langley | 2025 |
| Kitnocks Farms Limited | Curdridge | 1987 |
| Kits Coty Stud Limited | Waltham Cross | 2010 |
| Kittow Cattle Limited | Hemyock Cullompton | 2003 |
| Kitts END Farm (Dairies) Limited | Hadley Wood Barnet | 1960 |
| Kitty Yoga London Ltd | Loughborough | 2024 |
| Kitty Yoga Manchester Ltd | Bromsgrove | 2024 |
| Kittykamp UK Limited | Basildon | 2025 |
| Kittykat Retreat Ltd | Sutton Coldfield | 2026 |
| Kiwi Express Ltd | Tiverton | 2024 |
| Kiwi Fencing Limited | Hampshire | 2003 |
| Kiwi Nurseries Limited | Wigan | 2004 |
| Kiwiberry Breeding Innovations Ltd | London | 2025 |
| KJ & NM Samuel Limited | Deerhurst | 2017 |
| KJ Equine Angel Limited | Northampton | 2011 |
| KJC Fishing & Marine Ltd | Shetland | 2016 |
| KJC Trees Ltd | Chichester | 2018 |
| KJF Productions Limited | Warrington | 2015 |
| KJG Fishing Ltd | Newton Abbot | 2016 |
| KJL Fishing Ltd | Macduff | 2025 |
| KJM Fishing Ltd | Lairg | 2020 |
| KJM Forestry Ltd | Newtown | 2017 |
| KJP Shellfish Ltd | Bridlington | 2012 |
| KJR Contracts Limited | Maldon | 2014 |
| KJS Surveying Ltd | York | 2025 |
| KJT Contracting Limited | Goole | 2024 |
| KJT Holdings Limited | Newton Abbot | 2016 |
| KK - Equines Ltd | Peterborough | 2020 |
| KK Party Play CYF | Merthyr Tydfil | 2020 |
| KKD Farms Ltd | Kettering | 2022 |
| Kkfo 2 Limited | London | 2023 |
| Kkli Ltd | Downpatrick | 2020 |
| Kkubi Group Ltd | London | 2023 |
| KL Farming Services Ltd | Tiverton | 2025 |
| Klassy Bullz Kennels Ltd | London | 2024 |
| KLD Solutions Ltd | Banbury | 2021 |
| Kleen Kutt Limited | Bridgwater | 2005 |
| KLJ Farms Ltd | Southport | 2025 |
| KLM Fishing Ltd | Lerwick | 2025 |
| KLO Photography & Equine Limited | Shrewsbury | 2026 |
| Klondyke Allotment Association CIC | Bury St. Edmunds | 2016 |
| Klondyke Farms Limited | Moniaive | 1999 |
| Klondyke Fishing Company Limited | Fraserburgh | 1981 |
| Klondyke Pelagic Sustainability Group Limited | Fraserburgh | 2025 |
| Klondyke Quota Management Group Limited | Fraserburgh | 2008 |
| Klyde K9 Friends Ltd | Greenock | 2022 |
| Klyne Marine Ltd | Lowestoft | 2022 |
| KM Arboriculture Ltd | Littleborough | 2025 |
| KM Diving Ltd | Gourock | 2020 |
| KM Flower Farm Limited | Malmesbury | 2024 |
| KM Honey Limited | Sunbury-On-Thames | 2024 |
| Kmac Limited | | 1997 |
| Kmac Services Ltd | Sheffield | 2015 |
| KMC Ayrshire Ltd | Ayr | 2020 |
| Kmcc Livestock Limited | Lisbellaw | 2011 |
| Kmclivestock Ltd | Lockerbie | 2018 |
| Kmdr Agri Services Limited | Harrow | 2009 |