| Kent Property Group Ltd | Real estate | 2017 |
| Kent Refugee Action Network | Health & social care | 2003 |
| Kent Regenerative Hub Ltd | Health & social care | 2025 |
| Kent Remapping and Carbon Cleaning Ltd | Wholesale & retail | 2026 |
| Kent Sash Window Repairs Ltd | Manufacturing | 2018 |
| Kent School of Fashion Ltd | Wholesale & retail | 2022 |
| Kent Taxi Travel Ltd | Transport & logistics | 2025 |
| Kent Template Ltd | Construction | 2023 |
| Kent Tooling and Components Limited | Manufacturing | 1979 |
| Kent Tooling Diving Products Limited | Extraterritorial | 2008 |
| Kent Union | Education | 2019 |
| Kent Union Trading Limited | Other services | 2009 |
| Kent Unity Arts CIC | Arts & recreation | 2026 |
| Kent Workspace Consultants Limited | Administrative & support | 2017 |
| Kentish Fish & Chips Ltd | Hospitality | 2026 |
| Kentish PIP Ltd | Wholesale & retail | 2016 |
| Kentworth Ltd | Professional & scientific | 2026 |
| Kepithor Studios Ltd | Information & communication | 2018 |
| Kept Swept Ltd | Administrative & support | 2023 |
| Kernel Floss Ltd | Arts & recreation | 2026 |
| Kesson Physiotherapy Limited | Health & social care | 2011 |
| Kesson Pilates Limited | Arts & recreation | 2024 |
| Kesson Property Limited | Real estate | 2017 |
| Key Care Management Limited | Health & social care | 1995 |
| Key Power Services Ltd | Construction | 2024 |
| Keynote Business Services Ltd | Information & communication | 1997 |
| Keystone Fabrications Limited | Construction | 2011 |
| Khalahari UK Ltd | Wholesale & retail | 2026 |
| Khebhi Ltd | Real estate | 2019 |
| Khidmat-E-Khalak Limited | Health & social care | 2023 |
| Kiddosafe Limited | Information & communication | 2024 |
| Kiki Groceries Store Ltd | Wholesale & retail | 2026 |
| Kiki Hospitality Ltd | Hospitality | 2024 |
| Kimberley Expertise Limited | Wholesale & retail | 1996 |
| Kind by Amber Ltd | Wholesale & retail | 2025 |
| Kindeo Limited | Administrative & support | 2014 |
| Kindkleen Homes Limited | Administrative & support | 2025 |
| Kinesis AI Holdings Limited | Information & communication | 2025 |
| King Charles Court (Walmer) Flat Management Limited | Households | 1996 |
| King Commercials Ltd | Wholesale & retail | 2022 |
| Kingfisher Consultancy Services Ltd | Professional & scientific | 2017 |
| Kings Chase (Faversham) Management Limited | Households | 2004 |
| Kings Hill Garage Limited | Wholesale & retail | 1997 |
| Kings Monster Carp Baits Ltd | Agriculture & fishing | 2023 |
| Kingsbrook Management Limited | Households | 2007 |
| Kingshill Management Services Limited | Administrative & support | 2001 |
| Kingsman Properties Ltd | Real estate | 2015 |
| Kingston Country Inns Limited | Hospitality | 2014 |
| Kinsmile Developments Ltd | Construction | 2016 |
| Kitty Financial Ltd | Professional & scientific | 2026 |
| Kivo Solutions Ltd | Information & communication | 2025 |
| KJA Book Keeping Services Limited | Professional & scientific | 2003 |
| Kkpi Limited | Real estate | 2023 |
| Kksv Ltd | Extraterritorial | 2021 |
| KLB Transport Limited | Transport & logistics | 2013 |
| KLN Coldred Limited | Construction | 2020 |
| KLN Development Limited | Construction | 2018 |
| KLN Greyhound Limited | Construction | 2019 |
| KM Television Limited | Information & communication | 2013 |
| KN & Co Limited | Health & social care | 2014 |
| Knat Services Limited | Financial services | 2014 |
| Knewave Ltd | Information & communication | 2013 |
| KNH Holdings Ltd | Real estate | 2023 |
| Knight Financial Consultants Limited | Professional & scientific | 1990 |
| Knights Mariner Ltd | Professional & scientific | 2019 |
| Knowler Consultancy Limited | Information & communication | 2023 |
| Knowler Farm CIC | Other services | 2024 |
| Knowlton LP | | 2015 |
| KNP Estates Ltd | Construction | 2020 |
| KNS Homes Limited | Construction | 2005 |
| KNS Kent Ltd | Real estate | 2014 |
| Koalti Limited | Professional & scientific | 2002 |
| Koel Bird UK Limited | Wholesale & retail | 2019 |
| Koinonia Investments Limited | Real estate | 2011 |
| Kolect ID Limited | Information & communication | 2022 |
| Konfield Development Company Limited | Construction | 2025 |
| Kore Alliance Limited | Information & communication | 2012 |
| Koresupport Limited | Information & communication | 2012 |
| Korinth Security Limited | Administrative & support | 2014 |
| Koseli Ghar Limited | Wholesale & retail | 2017 |
| KP GP Services Ltd | Health & social care | 2020 |
| KP Plumbing & Heating Engineers Ltd | Construction | 2019 |
| KPA Reality Ltd | Real estate | 2026 |
| KPE Cabs Ltd | Transport & logistics | 2023 |
| Kpgl Lettings Ltd | Real estate | 2022 |
| KPM Holdings (Kent) Ltd | Financial services | 2023 |
| KR Inspection Limited | Professional & scientific | 2022 |
| Krap Group Ltd | Wholesale & retail | 2025 |
| Kratu Ltd | Education | 2025 |
| Kripa Retail Ltd | Wholesale & retail | 2025 |
| Kris Still Limited | Health & social care | 2021 |
| Krisis Solar Ltd | Construction | 2026 |
| Kristen Stavridis Nutrition and Lifestyle Ltd | Health & social care | 2020 |
| Kristians Decorating Services Ltd | Construction | 2014 |
| Krono Heat Pumps Limited | Wholesale & retail | 2025 |
| Krwa Installations Ltd | Construction | 2024 |
| KS Admin Ltd | Administrative & support | 2026 |
| KSB Swimming Pools LLP | | 2012 |
| KSH Management Limited | Administrative & support | 2010 |
| KSI Consulting Limited | Real estate | 2025 |