| Kent Content Studios Ltd | Information & communication | 2026 |
| Kent Gardening Ltd | Administrative & support | 2017 |
| Kent Light Railway (KLR) Limited | Transport & logistics | 2023 |
| Kent Rheumatology Limited | Health & social care | 2020 |
| Kent Surface Coatings Ltd | Manufacturing | 2025 |
| Kewmont Limited | Financial services | 2025 |
| KH Desktop Support Ltd | Information & communication | 2008 |
| Kiln Fuels Limited | Wholesale & retail | 2012 |
| Kingsbright Limited | Education | 2025 |
| KIT HQ Ltd | Information & communication | 2026 |
| Kite Dispute Resolution and Mediation Services Ltd | Professional & scientific | 2005 |
| Kitty Kittley Fitness Ltd | Arts & recreation | 2017 |
| KJS Developments Limited | Construction | 2009 |
| Klimmek & Greybeard Limited | Real estate | 2024 |
| Klip Systems Limited | Professional & scientific | 2002 |
| Kljt Consultancy Limited | Professional & scientific | 2015 |
| Knightshadegaming Ltd | Extraterritorial | 2024 |
| Knox AD Limited | Real estate | 2018 |
| Korker Sausages Limited | Manufacturing | 1964 |
| Kreos Advisory Ltd | Manufacturing | 2025 |
| Krystal Lewis Essentials Ltd | Wholesale & retail | 2025 |
| L Cubed Properties Ltd | Construction | 2014 |
| L.M Grabhire Limited | Water & waste | 2019 |
| LA Mexikent Ltd | Hospitality | 2021 |
| LA VIE EN Rose Restaurant Limited | Hospitality | 2005 |
| Ladham Investments 2 Limited | Financial services | 2014 |
| Ladham Investments 3 Limited | Financial services | 2019 |
| Ladham Investments Limited | Financial services | 2014 |
| Ladham Properties Limited | Financial services | 2011 |
| Lamberhurst Engineering Kent Limited | Manufacturing | 2022 |
| Lambernet Ltd | Information & communication | 2024 |
| Lamula Ltd | Wholesale & retail | 2025 |
| Land Economics Ltd | Construction | 2011 |
| Land Robots Limited | Professional & scientific | 2018 |
| Landrake Surfacing Limited | Other services | 2012 |
| Large Duck Productions Ltd | Information & communication | 2024 |
| Larkins' Alehouse Limited | Hospitality | 2017 |
| Latitude Zero Ltd | Manufacturing | 2023 |
| LB Electrical Cranbrook Limited | Construction | 2013 |
| LDC Groundworks Ltd | Construction | 2026 |
| LDC Projects Ltd | Construction | 2014 |
| Legrys Limited | Real estate | 2011 |
| Lemon Blue Limited | Wholesale & retail | 2009 |
| LES Leston Limited | Manufacturing | 2024 |
| LES Leston Products Limited | Wholesale & retail | 2016 |
| Lets Moove Ltd | Real estate | 2024 |
| Lexical Llama Limited | Information & communication | 2022 |
| Liddle Perrett Commercial Ltd | Financial services | 2023 |
| Liddle Perrett Limited | Financial services | 2009 |
| Life Connected Limited | Health & social care | 2021 |
| Lifestyle and Fitness Limited | Health & social care | 2010 |
| Lifeworks Studio Ltd | Health & social care | 2023 |
| Lightning Tech Repairs South East LP | | 2024 |
| Lilac Properties Ltd | Real estate | 2021 |
| Lillesden House Management Company Limited | Households | 2016 |
| Lilymatthews Interiors Ltd | Wholesale & retail | 2019 |
| Lingam Carehome Ltd | Health & social care | 2021 |
| Lingfield Bespoke Carpentry and Build Ltd | Manufacturing | 2023 |
| Liquidity Risk Consultants Ltd | Financial services | 2015 |
| Liquidity Risk Consulting Limited | Professional & scientific | 2016 |
| Little Birds 1729 Ltd | Construction | 2019 |
| Little Orchard Group Limited | Real estate | 2021 |
| Little OWL Lectures Ltd. | Education | 2012 |
| Little Pickle Comms Ltd | Professional & scientific | 2026 |
| Lloyd's Consulting Engineering Ltd | Professional & scientific | 2019 |
| LLU Resourcing Ltd | Other services | 2020 |
| LLU Training Ltd | Other services | 2020 |
| LLU Upgrades Ltd | Other services | 2020 |
| Llullu Ltd | Information & communication | 2016 |
| LMT Equine Ltd | Professional & scientific | 2019 |
| Locked Pictures Limited | Information & communication | 2011 |
| Lodge Strategic Finance Limited | Professional & scientific | 2026 |
| LOM Enterprises Limited | Construction | 2016 |
| London Pacemaker Centre Limited | Health & social care | 2026 |
| Longfellowit Limited | Information & communication | 2019 |
| Lotus Global Consultancy Limited | Professional & scientific | 2009 |
| Loxley Partners Ltd | Professional & scientific | 2018 |
| Lucas Consulting Group Limited | Extraterritorial | 2015 |
| Lucidlink Limited | Professional & scientific | 2023 |
| Lucius MGA Ltd | Administrative & support | 2025 |
| Lucius Underwritting Services Ltd | Administrative & support | 2026 |
| Lumina Advisors Limited | Other services | 2011 |
| LUX Studios London Ltd | Professional & scientific | 2024 |
| Luxor Services Group Ltd | Construction | 2024 |
| Lwmcons Ltd | Other services | 2015 |
| Lynx Legal Limited | Other services | 2013 |
| M Clark Ltd | Professional & scientific | 2012 |
| M D Bennett Associates LLP | | 2012 |
| M House Improvements Ltd | Construction | 2024 |
| M Matias Ltd | Wholesale & retail | 2023 |
| Maganda Loyalty Ltd | Information & communication | 2022 |
| Magicbullet Marketing Ltd | Professional & scientific | 2024 |
| Majibu CIC | Professional & scientific | 2025 |
| Mani Trade Europe Limited | Financial services | 2025 |
| Mannlichen Property Services Limited | Real estate | 2011 |
| Manufacturing Recruitment Ltd | Administrative & support | 2000 |
| Margarit Productions Ltd | Arts & recreation | 2020 |
| Mark Alan Parsley Ltd | Professional & scientific | 2017 |
| Mark Heap Consulting Ltd | Professional & scientific | 2024 |
| Mark Lilly Property Limited | Real estate | 2011 |