| KBC GRP Ltd | Wholesale & retail | 2022 |
| KBC Heating Services Ltd | Construction | 2021 |
| KBE Drinks Enterprises Limited | Wholesale & retail | 2019 |
| KC Bloom Room Ltd | Other services | 2025 |
| KD Drainage Ltd | Water & waste | 2022 |
| Keast Consultancy Limited | Information & communication | 2026 |
| Keemlaw Limited | Manufacturing | 1991 |
| Keep IT Green Lawns Ltd | Administrative & support | 2024 |
| Kent and Medway Gastroenterology Ltd | Administrative & support | 2013 |
| Kent Boilercare Limited | Construction | 2003 |
| Kent Centre for Breast Surgery Limited | Health & social care | 2012 |
| Kent Coachworks Limited | Wholesale & retail | 2006 |
| Kent Contractor Services Limited | Professional & scientific | 2008 |
| Kent County Football Association Limited | Arts & recreation | 2000 |
| Kent Custom Events Ltd | Wholesale & retail | 2022 |
| Kent Dog Sitter - Aylesford Ltd | Agriculture & fishing | 2025 |
| Kent Flat Roofing Ltd | Construction | 2014 |
| Kent OFF Lead Ltd | Agriculture & fishing | 2025 |
| Kent Plant Sales Ltd | Wholesale & retail | 2025 |
| Kent Wraps Ltd | Wholesale & retail | 2022 |
| Kentish Construction Ltd | Construction | 2018 |
| Kentish Estates Management Limited | Financial services | 2024 |
| Kentstruction Ltd | Construction | 2022 |
| Keohane Limited | Construction | 2001 |
| KGM Fire & Security Distribution Ltd | Wholesale & retail | 2001 |
| Kilowatt Kooling FM Limited | Construction | 2022 |
| Kilowatt Kooling Ltd | Construction | 2011 |
| KIM Buckland Brand Consultant Limited | Professional & scientific | 2014 |
| Kinetic Transport Ltd | Transport & logistics | 2019 |
| King & Johnston Homes Limited | Construction | 1997 |
| Kingfisher Beer Europe Limited | Wholesale & retail | 1989 |
| Kingfisher Drinks Limited | Wholesale & retail | 2022 |
| Kings Court Property Management Limited | Administrative & support | 2000 |
| Kingshill Brickwork Limited | Construction | 2020 |
| Kingswood Bespoke Homes Ltd | Construction | 2025 |
| Kits Coty Glamping Limited | Arts & recreation | 2014 |
| Kjdp Consultancy Limited | Real estate | 2021 |
| KM Glazing Services Limited | Construction | 2017 |
| KMC Partners Limited | Financial services | 2024 |
| KMH Group Holdings Limited | Information & communication | 2024 |
| KMM Holding Ltd | Transport & logistics | 2019 |
| Knightsbridge Capital Consultants Ltd | Professional & scientific | 2024 |
| Knightsbridge Capital Developments Ltd | Administrative & support | 2015 |
| Kodiak Graphics Limited | Professional & scientific | 2024 |
| Kurlsbykait Ltd | Other services | 2024 |
| Kylo Renovations Landscaping Ltd | Agriculture & fishing | 2026 |
| L & M Renewables Ltd | Professional & scientific | 2023 |
| L Hammett Cars Limited | Wholesale & retail | 2019 |
| L Parnell Properties Ltd | Real estate | 2023 |
| L&B Property Rentals Ltd | Real estate | 2023 |
| L&D MOT Test Centre Ltd | Wholesale & retail | 2026 |
| L&T Commercials Limited | Wholesale & retail | 2025 |
| L71 Ltd | Professional & scientific | 2026 |
| LAC (Security Innovations) Limited | Construction | 2019 |
| Lacrosse Limited | Wholesale & retail | 2023 |
| Lakemead Consultancy Limited | Professional & scientific | 2022 |
| Lakemead Solutions Ltd | Professional & scientific | 2025 |
| Lakes Business Support Services Limited | Professional & scientific | 2026 |
| Landoak Construction Ltd | Construction | 2025 |
| LAP (Tilmanstone) Limited | Real estate | 2020 |
| Larkfield and New Hythe Football Club Limited | Arts & recreation | 1967 |
| Larkfield Coffee Limited | Hospitality | 2026 |
| Larkfield Cycles Limited | Wholesale & retail | 2010 |
| Larkfield Kebab & Pizza Ltd | Hospitality | 2017 |
| Larkfield Tandoori Limited | Hospitality | 2025 |
| Laskoil Limited | Wholesale & retail | 2004 |
| Laura Colyer Small Animal Care Limited | Professional & scientific | 2016 |
| Lbmoff Property Management Limited | Real estate | 2019 |
| LC Designs Co. Limited | Wholesale & retail | 1940 |
| LCL Sports Group Limited | Arts & recreation | 2019 |
| LCM Energy Limited | Mining & quarrying | 2019 |
| LCP Studio Limited | Professional & scientific | 2024 |
| LCS Kent Ltd | Wholesale & retail | 2025 |
| LDB Property Holdings Limited | Real estate | 2025 |
| LE Supermarket Limited | Wholesale & retail | 2022 |
| Lee's Apartments Ltd | Hospitality | 2020 |
| Leemass Limited | Real estate | 2020 |
| LEN Valley Roofing Limited | Construction | 2004 |
| Leralex Construction Ltd | Construction | 2026 |
| Lewishome Limited | Administrative & support | 1998 |
| Lewiton Ltd | Health & social care | 2014 |
| Leybourne Group Ltd | Financial services | 2020 |
| Leybourne Lake Watersports Centre Ltd | Arts & recreation | 2017 |
| Leywood Enterprises Limited | Real estate | 2021 |
| Liam Neill Electrical Ltd | Construction | 2017 |
| Liberty Safety Services Limited | Professional & scientific | 2010 |
| Lifespring Care Ltd | Health & social care | 2023 |
| Lightboard.Ai Limited | Education | 2024 |
| Lilypad Exterior Cleaning Ltd | Administrative & support | 2025 |
| Limitless Sports Ltd | Wholesale & retail | 2019 |
| Lisa Taylor Limited | Health & social care | 2008 |
| Little Barco Limited | Hospitality | 2017 |
| Little Brown Stick Properties Limited | Real estate | 2023 |
| Little Buddy Co Ltd | Manufacturing | 2026 |
| Little Gaynes Management Company Ltd | Professional & scientific | 2019 |
| Little Oaks Management Consultancy Limited | Professional & scientific | 2017 |
| Little Quackers Limited | Health & social care | 2016 |
| Little Stars Pre-School (Larkfield) Ltd | Health & social care | 2018 |
| Live Stack'D Ltd | Hospitality | 2025 |
| Living Lively | Education | 2011 |