| Koko Barbers Limited | Other services | 2019 |
| Koli Peri Peri Ltd | Hospitality | 2021 |
| Komar Travel and Transport Ltd | Transport & logistics | 2015 |
| Konda Limited | Real estate | 2016 |
| Konnectiv Limited | Administrative & support | 2025 |
| Koranna Limited | Financial services | 2013 |
| Korekwazi Ltd | Hospitality | 2022 |
| Koshi Wines Limited | Wholesale & retail | 2024 |
| Koskam Limited | Health & social care | 2025 |
| Koya Barbers Limited | Other services | 2022 |
| KP Services (Kent) Ltd | Administrative & support | 2025 |
| KPA Clerk of Works Services Limited | Construction | 2026 |
| Kpdh Ltd | Health & social care | 2022 |
| KPG Dynamics Limited | Wholesale & retail | 2025 |
| KPH Film & TV Services Ltd | Manufacturing | 2018 |
| KPH Surveying Services Ltd | Professional & scientific | 2015 |
| KPN Property Ltd | Real estate | 2022 |
| Krazykidzpartybus Ltd | Health & social care | 2019 |
| Krest Care Limited | Health & social care | 2025 |
| Kristal Associates LLP | | 2022 |
| Kristal Residential Limited | Real estate | 2022 |
| Kritan Limited | Hospitality | 2026 |
| KRK3 Limited | Construction | 2018 |
| KRM Global Tech Limited | Financial services | 2022 |
| Krrrp Limited | Transport & logistics | 2025 |
| KRS Clinical Solutions Ltd | Health & social care | 2024 |
| KS Consultansyuk Limited | Professional & scientific | 2012 |
| KS Mortgages Ltd | Financial services | 2025 |
| KS Spring Limited | Health & social care | 2023 |
| Ksas Limited | Professional & scientific | 2002 |
| KSG Construction Limited | Construction | 2017 |
| KSG Holdings Limited | Financial services | 2021 |
| Kskb Investments Ltd | Real estate | 2023 |
| KSL Cabling Limited | Construction | 2024 |
| KSR Facilities Ltd | Administrative & support | 2023 |
| KT Catering Limited | Hospitality | 2025 |
| KTK Homes Limited | Real estate | 2024 |
| Kubik Auto Care Ltd | Wholesale & retail | 2014 |
| Kubo HUT Limited | Real estate | 2025 |
| Kubocan Ltd | Extraterritorial | 2020 |
| Kulas Services Ltd | Professional & scientific | 2005 |
| Kuli's Ltd | Other services | 2022 |
| Kumar Homes Limited | Real estate | 2020 |
| Kunaka Ltd | Transport & logistics | 2026 |
| Kundoz Market Ltd | Wholesale & retail | 2025 |
| Kurdish Boys Limited | Other services | 2024 |
| Kushi Investments Ltd | Real estate | 2018 |
| Kutchenhaus Kent Ltd | Wholesale & retail | 2020 |
| Kutchenhaus Maidstone Ltd | Wholesale & retail | 2025 |
| Kuyas Cards Ltd | Wholesale & retail | 2025 |
| KV20 Consultancy Services Ltd | Professional & scientific | 2018 |
| Kvdr Property Ltd | Hospitality | 2024 |
| Kverm Ltd | Health & social care | 2020 |
| KVK Group Ltd | Construction | 2026 |
| KVM Kent Ltd | Health & social care | 2023 |
| Kwaden Services (UK) Ltd | Professional & scientific | 2021 |
| Kwikrod Limited | Construction | 2021 |
| Kyden Limited | Transport & logistics | 2005 |
| Kyran Wilford Consulting Limited | Professional & scientific | 2025 |
| KZN Consulting Ltd | Information & communication | 2011 |
| L & C Garages Ltd | Real estate | 2010 |
| L & K Solutions Ltd | Professional & scientific | 2020 |
| L and K Hair Design Limited | Other services | 2025 |
| L Burns Law Ltd | Professional & scientific | 2026 |
| L Dove Construction Limited | Construction | 2015 |
| L R Construction & Build Limited | Construction | 2020 |
| L&D Car Wash Ltd | Other services | 2018 |
| L&J FOX Ltd | Hospitality | 2019 |
| L&P Construction Ltd | Construction | 2010 |
| L'Arete Interior Designs Limited | Professional & scientific | 2024 |
| L'Eau Limited | Manufacturing | 2016 |
| L'Inizio Limited | Wholesale & retail | 2024 |
| L.A.B Properties (Kent) Limited | Real estate | 2020 |
| L.A.C. (Hastings) Limited | Education | 2013 |
| L.J. Grundon & Sons Limited | Water & waste | 1956 |
| L.O.G.G. Holdings Limited | Extraterritorial | 1995 |
| L2D Creative CIC | Arts & recreation | 2019 |
| LA DE DA Online Limited | Wholesale & retail | 2021 |
| LA LA Properties (Kent) Limited | Real estate | 2020 |
| LA Souris Verte Ltd | Professional & scientific | 2017 |
| LA Vida Consultancy Limited | Other services | 2010 |
| Laaj Limited | Wholesale & retail | 2016 |
| LAB Nova Ltd | Education | 2026 |
| LAB Stone (UK) Holdings Ltd | Wholesale & retail | 2026 |
| Labour Future (2025) Limited | Other services | 2025 |
| LAC Aviation Limited | Transport & logistics | 2002 |
| Lacaze Development Limited | Construction | 2022 |
| Lacaze Holdings Limited | Financial services | 2021 |
| Lacaze Projects Limited | Real estate | 2016 |
| Lacaze Properties Limited | Real estate | 2025 |
| Lace Group Ltd | Administrative & support | 2026 |
| Ladee Living Ltd | Households | 2019 |
| Lake House Kent Wellbeing C.I.C. | Other services | 2025 |
| Lakemead (Ashford)Management Company Limited | Hospitality | 1983 |
| Lakenny Limited | Real estate | 2021 |
| Lakeside Locks Ltd | Other services | 2018 |
| Lalu Cribs Ltd | Real estate | 2025 |
| Lamb-Latore' Limited | Construction | 1997 |
| Lamb.C Ltd | Professional & scientific | 2022 |
| Lambden Oaks Management Company Limited | Households | 2017 |