| Kise Production Ltd | Arts & recreation | 2024 |
| Kiss My Glass Medway Ltd | Extraterritorial | 2024 |
| Kitchen Bathroom Specialist Ltd | Construction | 2019 |
| Kitchen Culture (Kent) Limited | Wholesale & retail | 2013 |
| Kitchen Gallery Partnership LLP | | 2011 |
| Kitchenair Services UK Ltd | Construction | 2016 |
| Kitol Healthcare UK Limited | Health & social care | 2023 |
| Kitts Heating Limited | Construction | 2024 |
| Kittys Korner Group Limited | Wholesale & retail | 2024 |
| Kivistone Properties Limited | Real estate | 2019 |
| KJE Logistics Ltd | Transport & logistics | 2021 |
| Kjmy Ltd | Information & communication | 2025 |
| Kjprotect Ltd | Public administration | 2020 |
| KL Project Solutions Ltd | Professional & scientific | 2022 |
| Klassic Unisex Couture Ltd | Professional & scientific | 2025 |
| Kleardew Ltd | Administrative & support | 2023 |
| KLS Services (Kent) Limited | Construction | 2008 |
| KM Cleaning Ltd | Administrative & support | 2019 |
| KM Partnership Limited | Hospitality | 2006 |
| Kmaafo Group Ltd | Construction | 2019 |
| Kmaafo Homes Ltd | Real estate | 2022 |
| Kmit Consultancy Ltd | Information & communication | 2017 |
| Kmuk Ltd | Construction | 2015 |
| KN Plastering Ltd | Other services | 2021 |
| Kneo Limited | Transport & logistics | 2025 |
| Knights Web Development Limited | Information & communication | 2019 |
| Knowledge IS a Steep Limited | Information & communication | 2016 |
| Knowles Recruitment Ltd | Information & communication | 2026 |
| Kobet Ltd | Health & social care | 2018 |
| Komax Marine Co., Ltd. | Wholesale & retail | 2022 |
| Komel Bearing Co., Ltd. | Manufacturing | 2024 |
| Koneshramanaa Ltd | Wholesale & retail | 2020 |
| Konexus Global Limited | Professional & scientific | 2022 |
| Konfidi Project Solutions Ltd | Professional & scientific | 2024 |
| Konnectedtech Ltd | Information & communication | 2025 |
| Konnov Ltd | Manufacturing | 2025 |
| Konongo Market Limited | Wholesale & retail | 2013 |
| Korgan Capital Ltd | Wholesale & retail | 2024 |
| Koru International Limited | Other services | 2003 |
| Koruvibe Limited | Other services | 2019 |
| Koshy Residential Limited | Real estate | 2024 |
| Koshys Ltd | Hospitality | 2025 |
| Kosoko Group Ltd | Financial services | 2026 |
| Kotech Group Ltd | Wholesale & retail | 2022 |
| KPS Associates Ltd | Construction | 2012 |
| Krav Gear Ltd | Wholesale & retail | 2016 |
| Krav Maga Group Ltd | Education | 2021 |
| Krav Maga Kent Limited | Education | 2013 |
| Krish Enterprise Ltd | Wholesale & retail | 2024 |
| Krishalign Limited | Agriculture & fishing | 2025 |
| Krishav Yadhav Ltd | Wholesale & retail | 2026 |
| Krishna Vamshi Housing Limited | Real estate | 2025 |
| Krystal Ventures Limited | Financial services | 2018 |
| KS Nail & Spa Ltd | Other services | 2026 |
| KS Nails & Beauty Ltd | Other services | 2024 |
| KS Vehicle Solutions Ltd | Wholesale & retail | 2012 |
| KSM Woodbridge Ltd | Real estate | 2025 |
| KSS Wholesale Group Ltd | Wholesale & retail | 2026 |
| KT Solutions Limited | Financial services | 2019 |
| KTG Transport Ltd | Transport & logistics | 2025 |
| Ktph Ltd | Construction | 2025 |
| Kudos Property Services Limited | Construction | 2018 |
| Kully Services Limited | Professional & scientific | 2015 |
| Kunewyk Ltd | Wholesale & retail | 2021 |
| Kunfas Limited | Professional & scientific | 2016 |
| Kunj Enterprises Ltd | Wholesale & retail | 2026 |
| Kupl Ltd | Information & communication | 2022 |
| Kushkind Electrical Ltd | Construction | 2025 |
| Kutchenhaus Medway Ltd | Wholesale & retail | 2020 |
| KWH Training & Counselling Ltd | Health & social care | 2025 |
| Kwik Stop Gillingham Ltd | Wholesale & retail | 2025 |
| KY2 Services Limited | Information & communication | 2022 |
| Kybill Property Ventures Ltd | Construction | 2026 |
| KZ Material Ltd | Manufacturing | 2025 |
| Kzee Electrical Ltd | Other services | 2025 |
| Kölla UK Limited | Wholesale & retail | 1983 |
| L & B Optics Co., Ltd | Manufacturing | 2023 |
| L & D Electrical Limited | Construction | 2023 |
| L & I Construction Limited | Construction | 2002 |
| L & L Trowbridge Limited | Agriculture & fishing | 2018 |
| L and a Plumbing and Heating Designs Limited | Construction | 2014 |
| L and L Fire Protection Ltd | Construction | 2023 |
| L Benners Electrical Group Ltd | Construction | 2021 |
| L C Byne & SON Limited | Construction | 2004 |
| L C Insulation Services Ltd | Construction | 2018 |
| L Dennington Decorators Ltd | Construction | 2026 |
| L Hollingsworth Electrical Ltd | Construction | 2025 |
| L Norton Carpentry Limited | Manufacturing | 2025 |
| L Phillips Services Ltd | Administrative & support | 2019 |
| L Simmonds Ltd | Professional & scientific | 2026 |
| L&F Housing Ltd | Real estate | 2024 |
| L&P Educational Services Ltd | Education | 2018 |
| L. Robinson & Co (Gillingham) Limited | Wholesale & retail | 1948 |
| L.C.P. Automotive Components Limited | Professional & scientific | 1987 |
| L.I.N.K. Property Solutions Limited | Real estate | 2024 |
| L.I.N.K. Smoke Control Limited | Construction | 2020 |
| L.M. Electrical Limited | Construction | 2003 |
| L.M.S. Commercials Limited | Wholesale & retail | 2002 |
| LA Bamba Bar (Horsham) Ltd | Hospitality | 2025 |
| Labakepro Cleaning Ltd | Administrative & support | 2026 |