| Kentis PVT Limited | Other services | 2018 |
| Kenton Print Services Ltd | Manufacturing | 2023 |
| Kents Garden Ltd | Hospitality | 2025 |
| Kentto Limited | Wholesale & retail | 2023 |
| Kenus Trading Ltd | Real estate | 2016 |
| Kenway Recruitment Limited | Administrative & support | 2026 |
| Kenwood Medical Services Limited | Health & social care | 2009 |
| Kenyon Forge Limited | Real estate | 2009 |
| Kenyon Forge Management Company Limited | Real estate | 2009 |
| Kenyonrise Limited | Manufacturing | 2013 |
| Kenzite Ltd | Professional & scientific | 2026 |
| Keogh Construction Limited | Construction | 2022 |
| Keogh Properties Limited | Construction | 2016 |
| Keppel Seghers UK Ltd | Construction | 1993 |
| Kerala Lagoons Ltd | Hospitality | 2026 |
| Kerala Logistics Limited | Transport & logistics | 2025 |
| Kerala Taste Limited | Hospitality | 2016 |
| Kerala Vibes Ltd | Hospitality | 2025 |
| Keren Jackson PA Services Limited | Public administration | 2019 |
| Kerenza Palmer Ltd | Professional & scientific | 2023 |
| Keresafe Access Limited | Manufacturing | 2023 |
| Keri Link Consulting Ltd | Professional & scientific | 2026 |
| Keristar Limited | Wholesale & retail | 2020 |
| Kermallis Ltd | Real estate | 2020 |
| Kernal Limited | Wholesale & retail | 2019 |
| Kerne Limited | Real estate | 2019 |
| Kernow Breast Management Group Limited | Health & social care | 2016 |
| Kernow Investments | Financial services | 2022 |
| Keron Jackson Football Foundation CIC | Arts & recreation | 2022 |
| Kerrise James Limited | Education | 2026 |
| Kerrmead Limited | Construction | 1982 |
| Kerruss Limited | Information & communication | 2016 |
| Kersay Ltd | Other services | 2010 |
| Kersten Building Maintenance Ltd | Construction | 2020 |
| Kerui UK Holding Limited | Real estate | 2024 |
| Kerwood Design & Build Ltd | Construction | 2013 |
| Kerwood Property Developments Ltd | Construction | 2002 |
| KES Services Limited | Construction | 2009 |
| Kesarist Limited | Wholesale & retail | 2026 |
| Keshflip Ltd | Information & communication | 2024 |
| Keson Limited | Construction | 2025 |
| Kester Limited | Education | 2024 |
| Kestrel Aluminium Systems Limited | Wholesale & retail | 1989 |
| Kestrel Building Ltd | Construction | 2022 |
| Kestrel Care Ltd | Health & social care | 2010 |
| Kestrel House Ltd | Wholesale & retail | 2018 |
| Kestrel Industrial Services Limited | Administrative & support | 2009 |
| Kestrel Powder Coating Limited | Manufacturing | 2005 |
| Kestrel Wealth Management Limited | Financial services | 2015 |
| KET Healthcare Services Ltd | Health & social care | 2023 |
| Keto Kitchen Creations Limited | Hospitality | 2025 |
| Keto Level UP Limited | Wholesale & retail | 2020 |
| Keto Rockets Limited | Manufacturing | 2022 |
| Ketopluguk Ltd | Wholesale & retail | 2026 |
| Ketsia Recruitment Services Ltd | Administrative & support | 2025 |
| Ketteon LP | | 2017 |
| Kettering Fish & Chips Limited | Hospitality | 2019 |
| Kettering LEE Limited | Hospitality | 2020 |
| Kettering Tyres Limited | Extraterritorial | 1958 |
| Kettle Gram Ltd | Wholesale & retail | 2023 |
| Kettles Wood Drive Management Company Limited | Real estate | 2007 |
| Kettorah Studios Ltd | Information & communication | 2025 |
| Keturah Designs Ltd | Professional & scientific | 2019 |
| KEV O'Connor TV Rigging Services Ltd | Information & communication | 2014 |
| KEV Shaw Holdings Ltd | Financial services | 2025 |
| Kevafhinn Limited | Information & communication | 1996 |
| Kevand Holdings Ltd | Financial services | 2020 |
| Kevdrones Ltd | Information & communication | 2019 |
| Kevin & Bros Limited | Other services | 2019 |
| Kevin Builders Ltd | Construction | 2019 |
| Kevin France Upholstery Limited | Manufacturing | 1998 |
| Kevin International Ltd | Transport & logistics | 2024 |
| Kevin Ltd | Construction | 2025 |
| Kevin Mccoy Trading AS Ronnie's Ltd | Wholesale & retail | 2019 |
| Kevin Quinn Consultants Limited | Information & communication | 1999 |
| Kevindrive Ltd | Transport & logistics | 2026 |
| Kevins Floors Limited | Construction | 2020 |
| Kevlar Jewellery Limited | Wholesale & retail | 2023 |
| Kevoos Ltd | Wholesale & retail | 2025 |
| Kevrop Health Care Ltd | Health & social care | 2022 |
| Kevsdelivery Limited | Transport & logistics | 2022 |
| KEW Phase One RTM Company Limited | Households | 2010 |
| KEW Phase Two RTM Company Limited | Households | 2010 |
| Kewal Raja Limited | Professional & scientific | 2022 |
| Kewal West Limited | Professional & scientific | 2022 |
| Kewalion & Co Ltd | Administrative & support | 2019 |
| Kewalion Immigration Lawyers Ltd | Professional & scientific | 2024 |
| Keway Ltd | Other services | 2016 |
| Kewl Stuff Ltd | Professional & scientific | 2018 |
| Kewmatic Limited | Financial services | 1993 |
| Key & Castle Properties Ltd | Real estate | 2025 |
| Key & Co Home Ltd | Real estate | 2025 |
| Key & Linen Ltd | Real estate | 2025 |
| Key Assets Group Holding Limited | Financial services | 2020 |
| Key Assets Group Limited | Financial services | 2018 |
| Key Assets Holding Limited | Financial services | 2020 |
| Key Counselling Training Ltd | Education | 2019 |
| Key Estates Midlands Ltd | Real estate | 2019 |
| Key Fabs Limited | Professional & scientific | 1997 |
| Key Legal Ltd | Professional & scientific | 2020 |