| K-Demo Ltd | Construction | 2024 |
| K.A.T. Transport Ltd | Transport & logistics | 2015 |
| K.M Lifestyle Ltd | Other services | 2022 |
| K.P.D. Cafe Ltd | Hospitality | 2026 |
| K.Reeves Carpentry & Building Ltd | Other services | 2022 |
| K.T.M. Meats Limited | Wholesale & retail | 2001 |
| K.T.M.A Properties Limited | Real estate | 2017 |
| K10 Limited | Professional & scientific | 2015 |
| K4 Healthcare Limited | Administrative & support | 2012 |
| K5 Contractors Ltd | Construction | 2012 |
| KA Building&Decorating Services Ltd | Construction | 2016 |
| KAB Contractors Limited | Construction | 2016 |
| Kadosh Carpet and Furniture Ltd | Wholesale & retail | 2024 |
| Kahlons Property Investors Limited | Real estate | 2025 |
| Kainotomo Solutions UK Limited | Professional & scientific | 2018 |
| Kaizen Health Limited | Health & social care | 2014 |
| Kajus Limited | Construction | 2011 |
| Kakul Ltd | Education | 2026 |
| Kalam Properties and Investments Ltd | Real estate | 2017 |
| Kalbridge International Ltd | Professional & scientific | 2025 |
| Kalon Properties Limited | Real estate | 2019 |
| Kalshen Ltd | Wholesale & retail | 2024 |
| KAM and Sons Ltd | Real estate | 2025 |
| Kamaakshi Food Hub Ltd | Hospitality | 2024 |
| Kamaat Limited | Wholesale & retail | 2017 |
| Kamal Investment Properties Limited | Real estate | 2026 |
| Kamal Services (UK) Ltd | Construction | 2020 |
| Kamboj Drylining Limited | Construction | 2021 |
| Kamlives Services Ltd | Health & social care | 2024 |
| Kampii Media Ltd | Professional & scientific | 2016 |
| Kando Acquisitions Ltd | Real estate | 2025 |
| Kangascards Ltd | Wholesale & retail | 2021 |
| Kania Limited | Transport & logistics | 2011 |
| KAO Star Limited Limited | Administrative & support | 2023 |
| Kapilla Ltd | Real estate | 2024 |
| Kappa Project Solutions Ltd | Professional & scientific | 2017 |
| Karapinarbarber Ltd | Other services | 2017 |
| Kargo Lock Limited | Administrative & support | 2021 |
| Karim and Co London Ltd | Transport & logistics | 2019 |
| Karina Logistic Ltd | Transport & logistics | 2019 |
| Karman Leisure Ltd | Hospitality | 2024 |
| Karol Ltd | Transport & logistics | 2014 |
| Kash K Developments Ltd | Construction | 2024 |
| Kashmir Haulage Limited | Transport & logistics | 2019 |
| Kaspa's Desserts Chatham Ltd | Hospitality | 2022 |
| Kaspas Desserts Ltd | Hospitality | 2012 |
| Katrin 2020 Ltd | Transport & logistics | 2020 |
| Katt Security Ltd | Administrative & support | 2025 |
| Kauhona Limited | Health & social care | 2021 |
| Kaur Singh Solutions Ltd | Real estate | 2024 |
| Kauraa Construction Ltd | Construction | 2025 |
| Kaurs Properties Ltd | Real estate | 2026 |
| Kaveo Ltd | Manufacturing | 2025 |
| Kavis & Sons Car Sales Limited | Wholesale & retail | 2025 |
| Kawarpal Singh Groundwork Limited | Construction | 2022 |
| Kayat Care Services Ltd | Health & social care | 2020 |
| Kaysola Limited | Real estate | 2025 |
| Kazz Homes Ltd | Real estate | 2025 |
| Kazzco Ltd | Wholesale & retail | 2025 |
| KB Capital Ventures Limited | Financial services | 2022 |
| KB Media and Training Limited | Other services | 2021 |
| KB Roofing Ltd | Construction | 2013 |
| KBA Real Estate Limited | Real estate | 2024 |
| KBJ Enterprise Limited | Wholesale & retail | 2025 |
| KC London Ltd | Construction | 2011 |
| KCG Gravesend Limited | Hospitality | 2025 |
| Kcso Developments Limited | Real estate | 2013 |
| Kcttimbersupplies Ltd | Wholesale & retail | 2019 |
| KD Healthcare Limited | Health & social care | 2020 |
| KDL Propertymanagement Ltd | Households | 2025 |
| KDS Electrical Ltd | Construction | 2018 |
| Keane Grace Properties Ltd | Real estate | 2018 |
| Keeka Properties Limited | Real estate | 2023 |
| Keen Fork Ltd | Hospitality | 2021 |
| Keenan Family Investments Limited | Financial services | 2016 |
| Keep Safe Systems Ltd | Construction | 2026 |
| Kel&Ray Limited | Hospitality | 2021 |
| Kemfi Properties Ltd | Real estate | 2025 |
| Kemzproperty Limited | Real estate | 2024 |
| KEN Drylining Ltd | Construction | 2015 |
| Keni Contractors Limited | Construction | 2024 |
| Kennisblegad Consultancy Limited | Information & communication | 2018 |
| Kennisblegad Properties Limited | Households | 2019 |
| Kenny's Cafe Ltd | Hospitality | 2026 |
| Kent Aquatics Ltd | Agriculture & fishing | 2024 |
| Kent Association for Spina Bifida and Hydrocephalus | Health & social care | 2008 |
| Kent Catering Supplies Ltd | Wholesale & retail | 2026 |
| Kent Choice Cars Ltd | Wholesale & retail | 2024 |
| Kent Commercial Vehicle Solutions Ltd | Wholesale & retail | 2026 |
| Kent Contracts Ltd | Construction | 2017 |
| Kent County Cars Limited | Wholesale & retail | 2015 |
| Kent County K9 Ltd | Administrative & support | 2023 |
| Kent Diving Services Ltd | Other services | 2018 |
| Kent Epcs Limited | Households | 2020 |
| Kent Event Packages Ltd | Arts & recreation | 2018 |
| Kent Fashion Week Limited | Arts & recreation | 2020 |
| Kent Fire and Security Limited | Public administration | 2017 |
| Kent Fire Protection Services Ltd | Public administration | 2024 |
| Kent Gardens & Property Maintenance Ltd | Construction | 2025 |
| Kent HGV Break Test Ltd | Transport & logistics | 2025 |