| Kyon Digital Services Ltd | Information & communication | 2025 |
| Kyros Software Ltd | Information & communication | 2025 |
| Kyrs Residential Ltd | Real estate | 2024 |
| Kyrs Ventures Group Holdings Ltd | Financial services | 2024 |
| Kyrs Ventures Limited | Real estate | 2023 |
| Königbike Ltd | Manufacturing | 2025 |
| L & a Security Group Ltd | Other services | 2018 |
| L & M Highways Limited | Construction | 2023 |
| L & S Financial Consultancy Ltd | Professional & scientific | 2015 |
| L @ W Holdings Ltd | Financial services | 2024 |
| L a David LLP | | 2014 |
| L and S Builders Limited | Construction | 2012 |
| L Flack Capital Ltd | Financial services | 2026 |
| L Flack IOW1 Ltd | Real estate | 2026 |
| L Hooper Builders Ltd | Construction | 2019 |
| L N B Emporium Limited | Professional & scientific | 2023 |
| L P Cable Jointing Ltd | Manufacturing | 2016 |
| L P Vehicles Ltd | Wholesale & retail | 2026 |
| L&F Serviced Accommodation Ltd | Hospitality | 2023 |
| L&J Assets Ltd | Real estate | 2019 |
| L&J Home Developments Ltd | Construction | 2022 |
| L&K Projects Ltd | Construction | 2025 |
| L&T BIO Synthesis Ltd | Wholesale & retail | 2026 |
| L&T Services Ltd | Administrative & support | 2023 |
| L. R. B. a. Ltd | Professional & scientific | 2010 |
| L.A. Confidential Modelling Ltd | Professional & scientific | 2023 |
| L.A. Empirical Limited | Information & communication | 2022 |
| L.Banevicius Limited | Transport & logistics | 2026 |
| L.Lukauskas Limited | Transport & logistics | 2026 |
| L.P Tree Care & Landscaping Ltd | Agriculture & fishing | 2021 |
| L.T.Bichan & Company Limited | Agriculture & fishing | 1961 |
| L40 Holdings Limited | Professional & scientific | 2025 |
| L40 Restaurants Ltd | Hospitality | 2025 |
| L40 Ventures Limited | Hospitality | 2023 |
| L50 Group Ltd | Professional & scientific | 2026 |
| L77TECH Ltd | Information & communication | 2022 |
| LA Analytics Ltd | Information & communication | 2025 |
| LA Boutique D'Elly Ltd | Professional & scientific | 2025 |
| LA Chrystol Limited | Administrative & support | 2007 |
| LA Luna Consulting Limited | Professional & scientific | 2025 |
| LA Villetta (Maggiore) Limited | Real estate | 1990 |
| Laakso Ltd | Information & communication | 2022 |
| LAB Lifestyle & Co Ltd | Wholesale & retail | 2025 |
| LAB Proprietary Ltd | Real estate | 2024 |
| Labelvanta Shared Inbox Ltd | Information & communication | 2026 |
| Labour Faith Network | Extraterritorial | 2011 |
| Labraseal Media Limited | Information & communication | 2024 |
| Labsec Limited | Information & communication | 2018 |
| Laburnum & Sequoia Ltd | Financial services | 2026 |
| Labélle Stationer Ltd | Manufacturing | 2026 |
| Ladell Building & Construction Limited | Professional & scientific | 2006 |
| Laderro Ltd. | Construction | 2020 |
| Ladybird Records Ltd | Information & communication | 2023 |
| Lageria Ltd | Wholesale & retail | 2025 |
| Lagrange Systems Ltd | Professional & scientific | 2026 |
| Lais Enterprise Ltd | Real estate | 2023 |
| Lakaz Retreats Ltd | Extraterritorial | 2024 |
| Lakcaj Ltd | Construction | 2018 |
| Lake Brook Motors Ltd. | Wholesale & retail | 2025 |
| Lakenhall Limited | Construction | 2018 |
| Lakenheath Funeral Service Limited | Other services | 2021 |
| Lala Property Group Ltd | Real estate | 2026 |
| Lalek Care Services Limited | Health & social care | 2024 |
| Lalek Limited | Professional & scientific | 2015 |
| Lalek Properties Limited | Real estate | 2021 |
| Lamar Consultancy Limited | Administrative & support | 1998 |
| Lamberty's Building and Roofing Ltd | Construction | 2021 |
| Lamcma Ltd | Transport & logistics | 2025 |
| Lamilux U.K. Limited | Construction | 2010 |
| Lamport Technologies Ltd | Information & communication | 2026 |
| Lams Services Limited | Administrative & support | 2025 |
| Lamson Financial & Payroll Services Ltd | Administrative & support | 2017 |
| Lamy Wellbeing Limited | Health & social care | 2018 |
| Lanachie Ltd | Manufacturing | 2025 |
| Land & Gain Ltd | Real estate | 2026 |
| Land Pirate Conversions Ltd | Wholesale & retail | 2024 |
| Land Scripts Ltd | Information & communication | 2026 |
| Landamore’S Group Ltd | Agriculture & fishing | 2017 |
| Landbro Building Construction Ltd | Construction | 2018 |
| Landed Management Ltd | Professional & scientific | 2023 |
| Landmark Residential Projects Ltd | Real estate | 2022 |
| Landmark Services Ltd | Administrative & support | 2024 |
| Landspire Holdings Ltd | Real estate | 2025 |
| Land’S Windows and Doors Ltd | Construction | 2025 |
| Lane Eight Management Ltd | Arts & recreation | 2022 |
| Langton House Limited | Households | 2018 |
| Langtrey Heritage Global Limited | Wholesale & retail | 2026 |
| Language Atlas Ltd | Information & communication | 2026 |
| Lansbury Developments Limited | Construction | 2014 |
| Lapatas Consulting Limited | Professional & scientific | 2018 |
| Lapidus | Education | 2002 |
| Laplace Expert Ltd | Education | 2025 |
| Lapodo Ltd | Wholesale & retail | 2010 |
| Larcher Property Ltd | Real estate | 2026 |
| Lardner Street Corp Ltd | Wholesale & retail | 2025 |
| Lariat Ltd | Professional & scientific | 2019 |
| Lark Estates Limited | Real estate | 2020 |
| Lark Technology Group Holdings Limited | Wholesale & retail | 2023 |
| Lark Technology Holdings Ltd | Wholesale & retail | 2017 |
| Lark Valley Accounting Ltd | Professional & scientific | 2018 |