| Keiko Retail Ltd | Wholesale & retail | 2025 |
| Keir Broadcasting Ltd | Information & communication | 2023 |
| Kejyke Health Care Ltd | Health & social care | 2022 |
| Keldee Limited | Health & social care | 2011 |
| Keldholme Administration Ltd | Administrative & support | 2022 |
| Kella Trading Services Ltd | Hospitality | 2020 |
| Kellett Holdings Ltd | Financial services | 2025 |
| Kelling Developments Ltd | Real estate | 2010 |
| Kelling Heath Holiday Park Limited | Professional & scientific | 1972 |
| Kells O Roberts Limited | Health & social care | 2016 |
| Kelly Alexander Ltd | Administrative & support | 2015 |
| Kelx Comps Ltd | Administrative & support | 2026 |
| Kem-Kem Food & Service Limited | Manufacturing | 2023 |
| Kemp Auto Imports Limited | Wholesale & retail | 2026 |
| Kemp Marketing & Sales Services Ltd | Construction | 2025 |
| Kemps Place Limited | Health & social care | 2004 |
| Kemwood Limited | Health & social care | 2014 |
| Kendall Home Improvements Ltd | Construction | 2025 |
| Kenmare House (Brundall) Residents Association Limited | Households | 1979 |
| Kennedy Music (Surrey) Ltd | Arts & recreation | 2017 |
| Kennetdale Properties Limited | Construction | 1983 |
| Kenning Law Ltd | Professional & scientific | 2024 |
| Kenning Property Ltd | Real estate | 2019 |
| Kenninghall Solar Ltd | Energy | 2019 |
| Kens Corn Stores Limited | Wholesale & retail | 2003 |
| Kenshinkan Dojo UK Limited | Arts & recreation | 2025 |
| Kensi Holdings Limited | Financial services | 2025 |
| Kensington Court Residents Association Limited | Real estate | 1973 |
| Kensington Forge Residents Management Company Limited | Households | 2022 |
| Kensington Tea Co. Ltd | Extraterritorial | 2012 |
| Kent Consulting Engineers LLP | | 2013 |
| Kent House Property Management Ltd | Households | 2024 |
| Kent Magill Limited | Real estate | 2004 |
| Kent Property Services Centre Limited | Real estate | 1985 |
| Kent Security Solution Limited | Administrative & support | 2023 |
| Kent Square Care Group Ltd | Extraterritorial | 2024 |
| Kentoms Limited | Professional & scientific | 2016 |
| Kentrak Limited | Financial services | 1979 |
| Kenwick Road Development Limited | Construction | 2016 |
| Kenza Limited | Wholesale & retail | 2016 |
| Kenzie Dispute Resolution Limited | Extraterritorial | 2015 |
| Kenzoku Holdings Limited | Real estate | 2019 |
| Kenzoku Lettings Limited | Real estate | 2018 |
| Kenzoku Properties Limited | Construction | 2018 |
| Kenzoku Properties North East Ltd | Real estate | 2022 |
| Kenzoku Services Limited | Real estate | 2021 |
| KEO Touring and Performance Ltd | Extraterritorial | 2024 |
| KEQ Developments Limited | Hospitality | 2014 |
| KEQ Edwards Finance Limited | Extraterritorial | 2013 |
| KEQ Maltings Ltd | Hospitality | 2013 |
| KEQ2 Ltd | Extraterritorial | 2018 |
| Kera Accommodation Limited | Real estate | 2023 |
| Keram Catering Ltd | Hospitality | 2026 |
| Kerdiston Investments Limited | Real estate | 2016 |
| Kereds Advisory Limited | Financial services | 2026 |
| Kereds Construction Ltd | Construction | 2015 |
| Kereds Developments Limited | Construction | 2023 |
| Kereds Estates Ltd | Real estate | 2017 |
| Kereds Financial Limited | Financial services | 2015 |
| Kereds Investments Limited | Wholesale & retail | 2020 |
| Kereds Property Ltd | Real estate | 2017 |
| Kernow Search Limited | Administrative & support | 2024 |
| Kernowcampervans Ltd | Wholesale & retail | 2023 |
| Kerrison and Barrett Builders Limited | Construction | 2003 |
| Kerry Communications UK Ltd | Professional & scientific | 2017 |
| Kerry Pest Control Ltd | Administrative & support | 2019 |
| Kerry Plant Hire & Sales Limited | Construction | 2009 |
| Kerrys Investment Properties Limited | Real estate | 2017 |
| Kerry’S Irish Bar Norwich Limited | Hospitality | 2024 |
| Kersfield Developments (RHS) Limited | Construction | 2016 |
| Kerslake Holdings Limited | Financial services | 2025 |
| Kesfim Limited | Real estate | 2024 |
| Keshet Couture Limited | Wholesale & retail | 2016 |
| Kessingland Pharma Ltd | Wholesale & retail | 2022 |
| Kestrel Creations Ltd | Manufacturing | 2015 |
| Kestrel Furniture (Norwich) Limited | Manufacturing | 1986 |
| Kestrel Kitchens (Norwich) Limited | Manufacturing | 2005 |
| Keswick Hall Residents Association Limited | Households | 1986 |
| Keswick Vines Limited | Agriculture & fishing | 2024 |
| Ketaclinics Ltd | Health & social care | 2024 |
| Kett House Developments Ltd | Extraterritorial | 2021 |
| Kettco Autos Ltd | Wholesale & retail | 2026 |
| Kettle Foods Ltd. | Manufacturing | 1988 |
| Kettle Grower Services Limited | Other services | 2017 |
| Ketts Court Management Company Limited | Households | 2005 |
| Ketts Flooring Limited | Construction | 2005 |
| Ketts Hill Capital Limited | Professional & scientific | 2017 |
| Ketts Kabin Community Hub CIC | Wholesale & retail | 2023 |
| Kevic Construction Limited | Construction | 2003 |
| Kevin Boast Associates Limited | Professional & scientific | 2004 |
| Kevin Clarke Plumbing and Heating Ltd | Construction | 2007 |
| Kevin Cobbold Funeral Services Ltd | Other services | 2016 |
| Kevin Haylock Arbitration and Consultancy Services Limited | Professional & scientific | 2017 |
| Kevin Houghton Flooring Limited | Construction | 2008 |
| Kevin House Limited | Professional & scientific | 2018 |
| Kevin Pearce LLP | | 2007 |
| Kevin Piper Media Limited | Information & communication | 2009 |
| Kevin Rust Kitchen Design Centre Ltd | Professional & scientific | 2011 |
| Kevin Taylor Limited | Professional & scientific | 2003 |
| Kevway Hygienics Limited | Administrative & support | 2025 |