| Luington Ltd | Construction | 2025 |
| Luissa Trading Ltd | Information & communication | 2017 |
| Lujain Production Ltd | Information & communication | 2019 |
| Luka & Dobe Limited | Transport & logistics | 2022 |
| Luke Palmer Ltd | Wholesale & retail | 2014 |
| Luksaidin Ltd | Information & communication | 2025 |
| Lukshan Developments Limited | Other services | 2022 |
| Lukshmi Properties Ltd | Real estate | 2024 |
| Lukz Ltd | Transport & logistics | 2023 |
| Lulie Ltd | Professional & scientific | 2026 |
| Lullingstone Management Company Limited | Administrative & support | 2001 |
| Lulworth Investments Limited | Real estate | 2018 |
| Luma Education Recruitment Ltd | Administrative & support | 2025 |
| Lumar Ltd | Information & communication | 2004 |
| Lume Jewellery Limited | Wholesale & retail | 2026 |
| Lume Stores Ltd | Wholesale & retail | 2025 |
| Lumina Hub Ltd | Wholesale & retail | 2025 |
| Lumina Residences Ltd | Real estate | 2025 |
| Luminar Consultancy UK Ltd | Professional & scientific | 2024 |
| Luminar Luxe Healthcare Ltd | Wholesale & retail | 2023 |
| Luminara Holdings Ltd | Real estate | 2025 |
| Luminary Data Ltd | Information & communication | 2018 |
| Luminex Electrical Services Ltd | Construction | 2025 |
| Luminour Limited | Wholesale & retail | 2023 |
| Luminous Wealth Ltd | Administrative & support | 2024 |
| Lumo Living Ltd | Real estate | 2026 |
| Lumora Ventures PVT Ltd | Wholesale & retail | 2025 |
| Lumorrow Ltd | Information & communication | 2026 |
| Luna and Co Limited | Wholesale & retail | 2025 |
| Lunafast Limited | Information & communication | 2026 |
| Lunar Bifold Doors Limited | Construction | 2019 |
| Lunar Developers Ltd | Real estate | 2024 |
| Lunar Glazing Limited | Construction | 2023 |
| Lunel Associates Limited | Administrative & support | 2019 |
| Lunel Limited | Wholesale & retail | 2020 |
| Lunera Trading Ltd | Wholesale & retail | 2025 |
| Lungu Drylining Expert Ltd | Construction | 2017 |
| Lunoos Ltd | Wholesale & retail | 2025 |
| Lunárique Ltd | Wholesale & retail | 2022 |
| Lupu Construct Limited | Financial services | 2019 |
| Lupu Construction Ltd | Construction | 2017 |
| Lupus 82 Ltd | Wholesale & retail | 2014 |
| Luronkris Ltd | Health & social care | 2019 |
| Lush & Plush Ltd | Other services | 2020 |
| Lush Interiors East Ltd | Wholesale & retail | 2019 |
| Lushla Fuels Ltd | Wholesale & retail | 2022 |
| Lushla Ltd | Wholesale & retail | 2019 |
| Lushla Supermarkets Ltd | Wholesale & retail | 2022 |
| LUSSO20 Ltd | Wholesale & retail | 2004 |
| Lussosafavero Limited | Wholesale & retail | 2025 |
| Lustec Securities Limited | Real estate | 2000 |
| Lustrous House Ltd. | Health & social care | 2017 |
| Lutfar Rahman Builders Ltd | Construction | 2020 |
| Luvly Bubbly Limited | Manufacturing | 2011 |
| LUX Auto Leasing Ltd | Wholesale & retail | 2025 |
| LUX Automotive London Ltd | Wholesale & retail | 2018 |
| LUX Moving Ltd | Real estate | 2024 |
| LUX Physio Ltd | Other services | 2023 |
| LUX Sanitary Limited | Manufacturing | 2018 |
| LUX Voyage Ltd | Administrative & support | 2017 |
| Luxaro Limited | Wholesale & retail | 2018 |
| Luxcleaners Ltd | Other services | 2025 |
| Luxe Aesthetic Clinic Limited | Health & social care | 2025 |
| Luxe Cutz Limited | Other services | 2015 |
| Luxe Digital Ltd | Wholesale & retail | 2025 |
| Luxe Harbour Ltd | Wholesale & retail | 2025 |
| Luxe Housing Management Limited | Real estate | 2025 |
| Luxe Vows Ltd | Professional & scientific | 2025 |
| Luxeflip Estates Ltd | Construction | 2024 |
| Luxelynk Ltd | Wholesale & retail | 2026 |
| Luxent Capital Ltd | Real estate | 2026 |
| Luxgym Limited | Wholesale & retail | 2016 |
| Luxline Assets Limited | Real estate | 2025 |
| Luxontel Mart Limited | Wholesale & retail | 2021 |
| Luxride Chauffeurs Ltd | Transport & logistics | 2026 |
| Luxuria Property Group Limited | Real estate | 2019 |
| Luxury Aura Private Limited | Wholesale & retail | 2020 |
| Luxury Candle Supplies Ltd | Administrative & support | 2018 |
| Luxury Car Rentals Limited | Transport & logistics | 2025 |
| Luxury Halal Limited | Manufacturing | 2023 |
| Luxury Home London Naima Ridoy Ltd | Real estate | 2024 |
| Luxury Hotel Holidays Limited | Administrative & support | 1997 |
| Luxury Lettings Limited | Real estate | 2011 |
| Luxury Preloved Ltd | Wholesale & retail | 2025 |
| Luxury RAW Hair London Ltd | Wholesale & retail | 2021 |
| Luxury Travel London Limited | Transport & logistics | 2025 |
| Luxurylifepk Ltd | Real estate | 2020 |
| Luxway Ltd | Wholesale & retail | 2025 |
| Luxynia Ltd | Wholesale & retail | 2025 |
| LVP 91 Ltd | Construction | 2024 |
| LW Global Ltd | Real estate | 2025 |
| Lxlounge Limited | Other services | 2020 |
| Ly&Co London Company Ltd | Transport & logistics | 2021 |
| Lycon Nordic Limited | Extraterritorial | 2009 |
| Lyder Limited | Construction | 2024 |
| Lydnat UK Ltd | Hospitality | 2019 |
| Lylyaly Ltd | Transport & logistics | 2019 |
| Lynchscape Ltd | Extraterritorial | 2013 |
| Lyniecea Annashae Gruber Ltd | Extraterritorial | 2023 |
| Lynridge Hotel Ltd | Hospitality | 2014 |