| Kent Social Care and Consultancy Ltd | Administrative & support | 2021 |
| Kent Solutions Group Ltd | Financial services | 2021 |
| Kent Specialist Groundworks & Construction Limited | Construction | 2025 |
| Kent Stonebridge Property Limited | Real estate | 2025 |
| Kent Structural & Architectural Ltd | Construction | 2010 |
| Kent Technical Services Limited | Information & communication | 2022 |
| Kent Trades Ltd | Wholesale & retail | 2021 |
| Kent UK Promotions Ltd | Other services | 2021 |
| Kent Vehicle Security Ltd | Wholesale & retail | 2024 |
| Kent Village Life Watling Street Limited | Real estate | 2022 |
| Kent Window Films Limited | Manufacturing | 2019 |
| Kentish Wordsmith Limited | Financial services | 2023 |
| Kentwich Property Limited | Real estate | 2017 |
| Kenway Printers & Stationers Limited | Manufacturing | 1993 |
| Kepa Care Solutions Limited | Health & social care | 2020 |
| Kerabody Ltd | Wholesale & retail | 2024 |
| Kerbside Holdings Ltd | Financial services | 2026 |
| Kerbside Properties Limited | Real estate | 2025 |
| Kerbsidedeals Ltd | Wholesale & retail | 2024 |
| Kerching Giveaways Limited | Wholesale & retail | 2026 |
| Keren Facilities Management (KFM) Ltd | Administrative & support | 2025 |
| Keronmaks Services Limited | Professional & scientific | 2019 |
| Kerradale Limited | Construction | 2026 |
| Kesblade Limited | Professional & scientific | 1985 |
| Kesh Global Services Ltd | Education | 2026 |
| Ketian Consulting Ltd | Information & communication | 2025 |
| Kevsym Ltd | Water & waste | 2024 |
| Key Packaging UK Limited | Administrative & support | 2004 |
| Key Promotions (UK) Limited | Administrative & support | 2002 |
| KFT & PM Limited | Other services | 2023 |
| KG Dhillon Properties Limited | Real estate | 2023 |
| KG Secure Systems Limited | Administrative & support | 2022 |
| KGM Transport Limited | Extraterritorial | 2020 |
| KGN Developments Limited | Construction | 2015 |
| Khanapina DOT COM Limited | Hospitality | 2024 |
| Khaton Catering Limited | Hospitality | 2025 |
| Khushiyan Sweets Ltd | Wholesale & retail | 2021 |
| Kids Property Management Limited | Real estate | 2012 |
| Kieranknightcreative Limited | Arts & recreation | 2023 |
| Kilinc Chef Services Ltd | Hospitality | 2020 |
| Killian Services Ltd | Construction | 2018 |
| Kilo Alpha Construction Catering Limited | Hospitality | 2020 |
| Kilo Juliet Holdings Limited | Administrative & support | 2024 |
| Kindling Commercial Ltd | Manufacturing | 2022 |
| Kinetic Driving School Limited | Other services | 2011 |
| King's School, Rochester | Education | 1999 |
| Kingdom Citizen Ltd | Wholesale & retail | 2021 |
| Kingdom Guards Limited | Administrative & support | 2024 |
| Kingfisher Access Limited | Education | 2008 |
| Kinghenry Consultancy Ltd | Professional & scientific | 2026 |
| Kingsnorth Pre-School and Day Nursery Limited | Health & social care | 2022 |
| Kinloch Maintenance Limited | Extraterritorial | 2005 |
| Kinlochs and SON Group Limited | Financial services | 2023 |
| Kinlochs and SON Holdings Limited | Financial services | 2011 |
| Kinlochs and SON Ltd | Construction | 2000 |
| Kinlochs Holdings Limited | Financial services | 2023 |
| Kirby Mortgages Ltd | Financial services | 2025 |
| Kirton & Sons Limited | Construction | 2012 |
| Kismet Catering Limited | Hospitality | 2019 |
| Kitbell Limited | Wholesale & retail | 2024 |
| Kitchen Centre (Kent) Limited | Wholesale & retail | 2013 |
| Kitchen Respray Specialists Ltd | Other services | 2021 |
| Kitchen Worktop Specialists Limited | Manufacturing | 2019 |
| Kiwi Engineering Ltd | Professional & scientific | 2021 |
| Kiwi Print (Kent) Ltd | Manufacturing | 2017 |
| KJA Offshore Personnel Limited | Administrative & support | 2024 |
| KJB Facilities Ltd | Construction | 2020 |
| KJJ Petlyn Consult Ltd | Professional & scientific | 2016 |
| KJM IT Solutions Ltd | Administrative & support | 2018 |
| KJW Scaffolding Ltd | Construction | 2024 |
| KKB Demolition Limited | Construction | 2024 |
| KKB Fleet Services Ltd | Construction | 2010 |
| KKB Group Ltd | Extraterritorial | 2018 |
| KKH Finance Partnering Ltd | Professional & scientific | 2016 |
| KKS GAS & Electric Ltd | Construction | 2020 |
| Kksfc Services Limited | Transport & logistics | 2026 |
| Kloud Solutions Limited | Extraterritorial | 2015 |
| Klrolf Limited | Hospitality | 2018 |
| KM & JM Property Ltd | Real estate | 2025 |
| KM Direct Limited | Administrative & support | 2013 |
| KM Media Group Limited | Information & communication | 2013 |
| KM4 Services Ltd | Real estate | 2014 |
| KMCC90 Limited | Construction | 2025 |
| KMD (London) Ltd | Real estate | 2018 |
| KMQ Holdings Limited | Professional & scientific | 2025 |
| KMR Financial Services Limited | Financial services | 2021 |
| KNF Roofing Ltd | Construction | 2021 |
| KNG Estates Limited | Construction | 2015 |
| Kngr Security Limited | Administrative & support | 2024 |
| Knight Construct Limited | Construction | 2019 |
| Knights Place Farm Land Limited | Construction | 2012 |
| Knights Place Farm Limited | Real estate | 2003 |
| Knights Plaza Ltd | Construction | 2025 |
| Knightsbridge Elite Chauffeurs Ltd | Transport & logistics | 2026 |
| Knowle Grange Limited | Other services | 2020 |
| Koala Security Ltd | Administrative & support | 2025 |
| Koco World Limited | Arts & recreation | 2024 |
| Kodesh Ltd | Wholesale & retail | 2023 |
| Kokodam Limited | Real estate | 2024 |
| Komex Kitchen Limited | Hospitality | 2018 |