| KBH Trading Limited | Wholesale & retail | 2022 |
| KD Carpets (UK) Limited | Wholesale & retail | 2012 |
| KD Carpets Group Limited | Financial services | 2017 |
| KDL Consultants Ltd | Professional & scientific | 2012 |
| KDL Homestay Ltd | Real estate | 2024 |
| KE1TH Limited | Extraterritorial | 2020 |
| Kearby Capital Limited | Financial services | 2018 |
| Kearby Cliff LLP | | 2014 |
| Kearby Land Limited | Real estate | 2021 |
| Kearby Property Limited | Real estate | 2019 |
| Kedl Ltd | Wholesale & retail | 2022 |
| Keenan Acquisitions Limited | Real estate | 2026 |
| Keenan Holdings Limited | Manufacturing | 2019 |
| Keep on Thinking Ltd | Administrative & support | 2013 |
| Keep Security and Safety Limited | Other services | 2017 |
| Keepsafe ( Electrical ) Ltd | Construction | 2019 |
| Keighley & District Travel Limited | Transport & logistics | 1987 |
| Keighley Storage Limited | Transport & logistics | 2020 |
| Keigshevlin Limited | Information & communication | 2012 |
| Kelder Development Limited | Construction | 2018 |
| Kell Developments Ltd | Construction | 2018 |
| Kell Property Lettings Limited | Real estate | 2020 |
| Kellington Estates Limited | Real estate | 2007 |
| Kellwood Dragon Road Flats Limited | Real estate | 2008 |
| Kempals Ltd | Professional & scientific | 2026 |
| Kempston-Parkes Properties Limited | Real estate | 2021 |
| Kempston-Parkes Surveyors Ltd | Professional & scientific | 2021 |
| KEN Welch Limited | Hospitality | 2004 |
| Kendall Limited | Extraterritorial | 2025 |
| Kendalls Farm Butchers Ltd | Wholesale & retail | 2008 |
| Kennedy Properties Group Ltd | Real estate | 2023 |
| Kennel Minerals Limited | Mining & quarrying | 2012 |
| Kent Road (Brackenwood Harrogate) Management Company Limited | Households | 1999 |
| Kent Road Investments 2019 | Financial services | 2020 |
| Kent Road Investments 2020 | Financial services | 2020 |
| Kent Wood Close Maintenance Limited | Households | 1963 |
| Kentap Limited | Professional & scientific | 2013 |
| Kenyan Rural Community Developments Limited | Administrative & support | 2012 |
| KENZ1E Limited | Extraterritorial | 2020 |
| Kenzi Limited | Extraterritorial | 2020 |
| Kerala Groceries Ltd | Wholesale & retail | 2020 |
| Kerfut Ltd | Professional & scientific | 2018 |
| Kerr III Ltd | Administrative & support | 2024 |
| KEV1N Limited | Extraterritorial | 2018 |
| Kevin Martin Garden Services Limited | Administrative & support | 2012 |
| Keyse Plumbing & Heating Ltd. | Construction | 2016 |
| Kgaesthetics Limited | Other services | 2017 |
| KGD Group (UK) Ltd | Wholesale & retail | 2019 |
| KGS Partners Ltd | Professional & scientific | 2011 |
| KGZ Waste Removals Ltd | Water & waste | 2021 |
| KH4N Limited | Extraterritorial | 2018 |
| Khan FM Limited | Extraterritorial | 2015 |
| Khanz Harrogate Ltd | Hospitality | 2025 |
| Khasro Car Wash Ltd | Administrative & support | 2026 |
| Khat AL Shaar Trading &Import Company Ltd | Wholesale & retail | 2025 |
| KI Candles Ltd | Wholesale & retail | 2023 |
| KI Fitness Ltd | Arts & recreation | 2025 |
| Kiaser Limited | Wholesale & retail | 2022 |
| KIB Aesthetics Ltd | Health & social care | 2022 |
| Killer Heels Ltd | Extraterritorial | 2013 |
| Kilvington Hall Estate Management Limited | Real estate | 2020 |
| KIM Freeland Hmua Ltd | Other services | 2020 |
| Kimaki Limited | Extraterritorial | 2025 |
| Kin&Co Hairdressing Ltd | Other services | 2019 |
| Kind Media Ltd | Professional & scientific | 2011 |
| Kinetic Living Group Ltd | Manufacturing | 2022 |
| Kinetic Systems Support (UK) Limited | Financial services | 2012 |
| Kinetic Systems Support Limited Liability Partnership | | 2009 |
| Kinetic Worldwide Limited | Professional & scientific | 1984 |
| King Family Office Ltd | Professional & scientific | 2025 |
| King Medical Reporting Limited | Health & social care | 2010 |
| King Roofing (Harrogate) Limited | Construction | 2023 |
| King Technology Europe Limited | Extraterritorial | 2008 |
| King's Catering Company Limited | Hospitality | 2001 |
| Kingfisher Buddies Ltd | Health & social care | 2017 |
| Kingsgrove (UK) Ltd | Other services | 2025 |
| Kingsland Road Developments Ltd | Real estate | 2018 |
| Kingsley Court Management Company Limited | Real estate | 2015 |
| Kingsley Mortgages Limited | Administrative & support | 2002 |
| Kingstone Farms Limited | Agriculture & fishing | 2004 |
| Kingswood Cooper Properties Limited | Real estate | 2020 |
| Kingtel Ltd | Information & communication | 2025 |
| Kingwood Oaks Management Company Limited | Households | 2022 |
| Kinjugo Ltd | Education | 2018 |
| Kinloch and Ormiston Investments Ltd. | Real estate | 1989 |
| Kinloch Corporate Finance Ltd | Professional & scientific | 1983 |
| Kinstone Developments Limited | Construction | 2019 |
| Kinsugi AI Ltd | Information & communication | 2026 |
| Kintact Group Ltd | Information & communication | 2025 |
| KIP Mcgrath (Kmec Harrogate) LLP | | 2017 |
| Kirbys LLP | | 2008 |
| Kirbys Solicitors Limited | Professional & scientific | 2017 |
| Kirei Digital Limited | Professional & scientific | 2013 |
| Kirk Roofing Ltd | Construction | 2025 |
| Kirkby Associates Limited | Manufacturing | 2014 |
| Kirkfield Properties Ltd | Real estate | 2019 |
| Kirklees PFI Limited | Professional & scientific | 2007 |
| Kirsty Limited | Extraterritorial | 2020 |
| Kirwest Properties Limited | Real estate | 1962 |
| Kitchen Fit (UK) Ltd | Construction | 2017 |