| Kynoch Transport Ltd | Transport & logistics | 2025 |
| KZ Tile Stone Ltd | Construction | 2025 |
| L & ESS Limited | Health & social care | 2017 |
| L & L Inc Limited | Wholesale & retail | 2002 |
| L & S Furnishings Limited | Real estate | 1985 |
| L a B Drilling Services Ltd | Construction | 2024 |
| L G Installations and Repairs Limited | Construction | 2026 |
| L Gilham Properties Ltd | Real estate | 2014 |
| L J Auto Repairs (Kent) Ltd | Wholesale & retail | 2023 |
| L J C Properties Limited | Construction | 2025 |
| L K Compliance Limited | Administrative & support | 2000 |
| L P Barbers Ltd | Other services | 2013 |
| L Q Plumbing Services Limited | Construction | 2019 |
| L R Executive Hire Ltd | Transport & logistics | 2025 |
| L Squared Ventures Ltd | Wholesale & retail | 2026 |
| L&E Investors Ltd | Real estate | 2024 |
| L&T Solutions Ltd | Administrative & support | 2022 |
| L'Oeil D'Or Ltd | Health & social care | 2025 |
| L.& R.Josyfon Limited | Wholesale & retail | 1961 |
| L.A Security Systems Ltd | Administrative & support | 2023 |
| L.C Power Wash Ltd | Administrative & support | 2025 |
| L.N.S. Enterprise Ltd | Construction | 2022 |
| LA - ISH Limited | Health & social care | 2013 |
| LA Cars Kent Ltd | Other services | 2025 |
| LA Fabrications (South East) Limited | Manufacturing | 2021 |
| LA Kent Logistics Ltd | Transport & logistics | 2022 |
| LA Kitchens Ltd | Construction | 2012 |
| LA Laser Cutting & Profiling Limited | Manufacturing | 2023 |
| LA Macchina Cafe Ltd | Administrative & support | 2013 |
| LA Project Consulting Limited | Professional & scientific | 2015 |
| LA Rosa Limited | Hospitality | 2025 |
| LAB Digital Services Limited | Information & communication | 2023 |
| LAB View Ltd | Manufacturing | 2023 |
| Labb Work Ltd | Professional & scientific | 2024 |
| Laborandum Limited | Construction | 2021 |
| Labrynth Property Services Ltd | Water & waste | 2013 |
| LAC Carpentry Ltd | Manufacturing | 2023 |
| Lacroe Chemie Limited | Professional & scientific | 1993 |
| Lacroe International Ltd | Professional & scientific | 2000 |
| Lacroe Limited | Professional & scientific | 1993 |
| Lacroe U.K. Limited | Professional & scientific | 1993 |
| Lacuna 120 to 124 Residents' Management Company Limited | Households | 2004 |
| Lacuna 42 to 48 Residents' Management Company Limited | Households | 2001 |
| Lacuna 51 to 55 Residents' Management Company Limited | Households | 2001 |
| Lacuna 65 to 69 Residents' Management Company Limited | Households | 2001 |
| Ladder Legends Esports Ltd | Education | 2025 |
| Laddingford Consulting Ltd | Professional & scientific | 2019 |
| Laddingford Engineering Limited | Manufacturing | 2002 |
| Laddingford Farm Rentals Ltd | Real estate | 2024 |
| Laddingford Procurement Limited | Professional & scientific | 2026 |
| Ladds Court Farm Limited | Real estate | 1959 |
| Ladlac Marketing Ltd | Professional & scientific | 2026 |
| Ladyfields Residents Association Limited | Households | 1998 |
| Ladyr Wedding & Chauffeur Hire Limited | Other services | 2015 |
| Laganda Ltd | Professional & scientific | 2020 |
| Laguna Motor Cycles Limited | Wholesale & retail | 1987 |
| Laja Property Ltd | Real estate | 2018 |
| Lake House Consultants Ltd | Professional & scientific | 2023 |
| Lakeview Media & Language Services Ltd | Information & communication | 2016 |
| Lakitrans Ltd | Transport & logistics | 2020 |
| Lamarron Management Limited | Administrative & support | 1972 |
| Lambert Bahig Limited | Financial services | 2022 |
| Lambert Metals Holdings Limited | Financial services | 2014 |
| Lambert Metals International Limited | Wholesale & retail | 1991 |
| Lambeth Lettings and Maintenance Sheppey Ltd | Real estate | 2025 |
| Lami Hiab Transport Limited | Transport & logistics | 2026 |
| LAN Construction Ltd | Construction | 2015 |
| Lancaster Property Investments Limited | Hospitality | 2025 |
| Lancet Property Management Limited | Real estate | 2001 |
| Land and Water Resource Consultants Ltd | Professional & scientific | 1979 |
| Land Mass Developments Ltd | Construction | 2020 |
| Land Sale Limited | Construction | 2020 |
| Land Vision Developments Ltd | Professional & scientific | 2025 |
| Landau Drive Management Limited | Households | 2025 |
| Lande Solutions Limited | Construction | 2014 |
| Landmark Lifts Limited | Professional & scientific | 1998 |
| Landmark Security Limited | Administrative & support | 2009 |
| Landmount Estates Limited | Hospitality | 1999 |
| Landom Property Limited | Real estate | 2020 |
| Langcorn Electrical Limited | Administrative & support | 2014 |
| Langdale Advisors Ltd | Financial services | 2024 |
| Langley Packing Co Limited | Manufacturing | 1973 |
| Langley Park Golf Studio Limited | Education | 2019 |
| LANGUAGES54 Ltd. | Information & communication | 2020 |
| Lanhawk Estates Limited | Construction | 2019 |
| Lanmax Plant Transport Limited | Transport & logistics | 2012 |
| Lanspresado Investments Limited | Real estate | 2016 |
| Lanthorn Data Solutions Limited | Information & communication | 2020 |
| Lapeaco Ltd | Manufacturing | 2025 |
| Lapel Mens Hire Limited | Wholesale & retail | 1999 |
| LARA19 Limited | Transport & logistics | 2017 |
| Larex Ltd | Construction | 2026 |
| Larkai Property Ltd | Real estate | 2022 |
| Larko Capital Ltd | Real estate | 2024 |
| Larksnest Property Services Ltd | Real estate | 2025 |
| Lasama Holdings Ltd | Extraterritorial | 2017 |
| Lascome HR Ltd | Administrative & support | 2021 |
| Laser Logistics Limited | Extraterritorial | 2023 |
| Laser Mechanical & Electrical Ltd | Construction | 2011 |
| Laser Mechanical and Electrical EOT Limited | Administrative & support | 2021 |