| Kingsway Electrical Contractors Ltd | Construction | 2023 |
| Kingsway Motor Company (UK) Limited | Wholesale & retail | 2004 |
| Kingswood Centre(Tunbridge Wells)Limited | Health & social care | 1966 |
| Kingswood Place Limited | Households | 2007 |
| Kingswood Residents Association Limited | Other services | 1967 |
| Kingswood Road (Tunbridge Wells) Management Company Limited | Households | 2010 |
| Kingswood Roofing and Guttering Ltd | Construction | 2025 |
| Kinsave Ltd | Information & communication | 2024 |
| Kintsugi Running Ltd | Arts & recreation | 2019 |
| Kinvara Partners Limited | Extraterritorial | 2010 |
| KIP Mcgrath Tunbridge Wells LP | | 2013 |
| Kiran's Curries Limited | Hospitality | 2022 |
| Kirkdale Investments Limited | Real estate | 1999 |
| Kirsim Consulting Ltd | Information & communication | 2021 |
| Kitchen Spaces Limited | Construction | 2017 |
| Kitsu and T/A Ltd | Hospitality | 2026 |
| KJH Capital Limited | Real estate | 2012 |
| KJT Solutions Limited | Information & communication | 1998 |
| KLH Consultancy Ltd | Professional & scientific | 2026 |
| KLN Smiles Ltd | Health & social care | 2022 |
| KLS Enterprises Ltd | Administrative & support | 2024 |
| KM Consult Ltd | Professional & scientific | 2018 |
| KMC Property Limited | Real estate | 2019 |
| KMJ Living Ltd | Real estate | 2021 |
| KMJ Property (Tunbridge Wells) Limited | Real estate | 2009 |
| Kneady Technologies Ltd | Information & communication | 2020 |
| Knightsbridge Court Residents Management Company Limited | Households | 2002 |
| Knoll Court Limited | Real estate | 1997 |
| Knot Consulting Limited | Administrative & support | 2011 |
| Knox Nexus Limited | Information & communication | 2026 |
| Kobla Limited | Professional & scientific | 2020 |
| Kodola Consulting Ltd | Professional & scientific | 2025 |
| Konnecthouse Ltd | Administrative & support | 2024 |
| Kopan Weald Healthcare Services Ltd | Professional & scientific | 2013 |
| KOR24 Ltd | Hospitality | 2024 |
| Kore Essence Ltd | Wholesale & retail | 2025 |
| Korean Street Baguettes Ltd | Hospitality | 2024 |
| Korus Investments Limited | Real estate | 2014 |
| Korus Projects Limited | Construction | 2011 |
| Kotiki Interiors Limited | Wholesale & retail | 1999 |
| KP Luxury Travel Limited | Administrative & support | 2022 |
| KP2 RTM Company Limited | Extraterritorial | 2011 |
| Krimaya Consultancy Ltd | Professional & scientific | 2026 |
| Krxd Limited | Professional & scientific | 2024 |
| Kshetrapal Technologies Ltd | Information & communication | 2025 |
| Kshirsa Healthcare Ltd | Wholesale & retail | 2020 |
| Kshirsa Properties Ltd | Real estate | 2021 |
| KSM (Hastings) Limited | Hospitality | 2013 |
| KSM Properties (Hastings) LLP | | 2025 |
| Ksubi UK Limited | Wholesale & retail | 2022 |
| KTC Fire Limited | Wholesale & retail | 2011 |
| Ktcw Enterprises Limited | Hospitality | 2004 |
| Ktcw Holdings Limited | Professional & scientific | 2008 |
| Ktcw Retail Limited | Wholesale & retail | 2017 |
| Ktcw Ventures Limited | Wholesale & retail | 2007 |
| Kubi and Company Limited | Administrative & support | 2018 |
| Kudo England Ltd | Education | 2021 |
| Kudos Apartments Ltd | Households | 2018 |
| Kung FU Goose Limited | Arts & recreation | 2009 |
| Kung FU Schools Crawley LLP | | 2009 |
| Kung FU Schools Limited | Arts & recreation | 2013 |
| Kuraman Ltd | Information & communication | 2018 |
| Kurious Group Limited | Financial services | 2022 |
| Kwayie Property Limited | Real estate | 2024 |
| Kybo Investments Limited | Financial services | 2021 |
| Kyle Fyffe Ltd | Information & communication | 2014 |
| Kyss Construction Limited | Construction | 2009 |
| KYU DAN Sports Holidays Limited | Administrative & support | 1984 |
| L & G Garages Limited | Administrative & support | 2007 |
| L & M Decoration Specialists Ltd | Construction | 2026 |
| L & R Roofing Limited | Construction | 2010 |
| L Forrester Limited | Wholesale & retail | 2008 |
| L Four Consult Ltd | Professional & scientific | 2013 |
| L Gomez Holdings Limited | Professional & scientific | 2025 |
| L J G Roofing Services Limited | Construction | 2014 |
| L R Shelby Limited | Construction | 2018 |
| L'Atelieri LLP | | 2023 |
| L.D.J. Property and Investment Company Limited | Real estate | 1965 |
| L.G.R. Resources Ltd. | Administrative & support | 1999 |
| L.M.H. Electrical Contractors Limited | | 1972 |
| L3 Live Well Limited | Hospitality | 2026 |
| LA Bella Napoli (Battle) Limited | Hospitality | 2023 |
| Laab Studio Limited | Information & communication | 2020 |
| Labsthetix Ltd | Education | 2026 |
| Ladies of Restaurants Limited | Professional & scientific | 2018 |
| Ladycpr Limited | Professional & scientific | 2013 |
| Lagardère Travel Retail (UK) Ltd | Wholesale & retail | 2004 |
| Lagham Limited | Professional & scientific | 2012 |
| Lago Restaurants Ltd | Hospitality | 2019 |
| Laha Designs Ltd | Real estate | 2021 |
| Laing & Norris Associates Limited | Other services | 2009 |
| Laing Properties Ltd | Real estate | 2024 |
| Lakeview Developments Limited | Real estate | 2004 |
| Lala Musa Limited | Professional & scientific | 2024 |
| Lamberts Park (Management) Ltd | Real estate | 2019 |
| Lambs Larder Limited | Wholesale & retail | 2011 |
| Lamego Ltd | Administrative & support | 2016 |
| Lancaster Hunt Systems Limited | Information & communication | 1996 |
| Land.Ai Ltd | Information & communication | 2025 |
| Landa Projects Ltd | Real estate | 2022 |