| Lumion Software Ltd | Information & communication | 2025 |
| Lumiterra Limited | Wholesale & retail | 2025 |
| LUMIX1988 Limited | Hospitality | 2025 |
| Lummyther Ltd | Wholesale & retail | 2025 |
| Lumn Studio Ltd | Professional & scientific | 2025 |
| Lumo Lighting Limited | | 1990 |
| Lumora Labs Limited | Information & communication | 2025 |
| Lumoraveail Ltd | Information & communication | 2026 |
| Lumos Ledgers Limited | Professional & scientific | 2024 |
| Lumos Nordic Trade Ltd | Professional & scientific | 2026 |
| Lumoura Hair Ltd | Wholesale & retail | 2025 |
| Lumporte Limited | Wholesale & retail | 2025 |
| Luna Electrical Contractors Ltd | Construction | 2019 |
| Luna FAN Ltd | Wholesale & retail | 2025 |
| Luna Global Ltd | Wholesale & retail | 2024 |
| Luna Luxe Events Ltd | Hospitality | 2023 |
| Luna Play Therapy Ltd | Other services | 2023 |
| Luna Promotion Events Ltd | Professional & scientific | 2024 |
| Luna Supermarket Limited | Hospitality | 2020 |
| Luna Van Hire Ltd | Administrative & support | 2019 |
| Luna's Vegan Corner Ltd | Hospitality | 2019 |
| Lunabase Properties Limited | Real estate | 2022 |
| Lunamilux Limited | Wholesale & retail | 2025 |
| Lunar Furnishings Ltd | Wholesale & retail | 2026 |
| Lunar Phoenix Trading Ltd | Wholesale & retail | 2025 |
| Lunar Residential Ltd | Real estate | 2019 |
| Lunarwp Ltd | Information & communication | 2022 |
| Lunatoria Prime Ltd | Education | 2025 |
| Luna’S Light CIC | Health & social care | 2026 |
| Lunch @ Game Reserve Limited | Hospitality | 2018 |
| Lunde Autospa Limited | Extraterritorial | 2025 |
| Lundun Ltd | Wholesale & retail | 2025 |
| Lune ET Laine Ltd | Wholesale & retail | 2025 |
| Lunelle Store Limited | Wholesale & retail | 2025 |
| Lunexo Ltd | Information & communication | 2025 |
| Lunia 3D Ltd | Manufacturing | 2020 |
| Lunikom | Professional & scientific | 2023 |
| Lunivora Limited | Wholesale & retail | 2026 |
| Lunn's Plastering Limited | Construction | 2015 |
| Lunntharo Ltd | Wholesale & retail | 2025 |
| Luno Fashion Limited | Manufacturing | 2018 |
| Lunora Gift Haus Ltd | Wholesale & retail | 2025 |
| Lunovate Ltd | Other services | 2025 |
| Lunovia Limited | Wholesale & retail | 2025 |
| Lunse Ltd | Wholesale & retail | 2024 |
| LUO CAI Huang Limited | Wholesale & retail | 2021 |
| Luobin FC Limited | Financial services | 2021 |
| Luofy Limited | Manufacturing | 2021 |
| Lupincloud Property Management Limited | Households | 2007 |
| Lupum Limited | Administrative & support | 2015 |
| Lurara Ltd. | Information & communication | 2025 |
| Luriva Ltd | Wholesale & retail | 2025 |
| Luscious Beauty Limited | Other services | 2024 |
| Luscious Crown Limited | Other services | 2023 |
| Lush and Blush Limited | Other services | 2023 |
| Lush Vegan Ltd. | Hospitality | 2023 |
| Lushaura Ltd | Wholesale & retail | 2025 |
| Lushkin Films Ltd | Information & communication | 2025 |
| Lushlife Ventures Ltd | Wholesale & retail | 2026 |
| Lusogo Ltd | Wholesale & retail | 2025 |
| Lusso Ventures Limited | Wholesale & retail | 2025 |
| Lussodilusso Ltd | Wholesale & retail | 2023 |
| Luster Goods Ltd | Professional & scientific | 2022 |
| Luter Group Limited | Wholesale & retail | 2018 |
| Lutfi Ltd | Real estate | 2023 |
| Luther Engineering Services Limited | Construction | 2019 |
| Lutin China Development Ltd | Information & communication | 2024 |
| Luton Town Couriers Ltd | Transport & logistics | 2019 |
| LUV UR Feet Limited | Health & social care | 2021 |
| Luvbud Industrial Ltd | Manufacturing | 2026 |
| Luvia MIX Ltd | Other services | 2025 |
| Luvvi Design Ltd | Professional & scientific | 2024 |
| LUX & Co Beauty Bar Ltd | Other services | 2023 |
| LUX Aesthetics Limited | Other services | 2019 |
| LUX Brumalis Trading Ltd | Wholesale & retail | 2025 |
| LUX Doors & Windows Ltd | Construction | 2018 |
| LUX Elite Ltd | Information & communication | 2025 |
| LUX Escape Ltd | Professional & scientific | 2019 |
| LUX Family Law Ltd | Professional & scientific | 2017 |
| LUX Flow Ltd | Wholesale & retail | 2024 |
| LUX House London Ltd | Professional & scientific | 2019 |
| LUX Lane Group Ltd | Construction | 2023 |
| LUX Property Management Limited | Real estate | 2020 |
| LUX Real Estate Capital Limited | Real estate | 2016 |
| LUX Roche Limited | Wholesale & retail | 2024 |
| LUX Sample Concierge Limited | Manufacturing | 2020 |
| Luxangel Export UK Ltd | Wholesale & retail | 2018 |
| Luxav Ltd | Wholesale & retail | 2024 |
| Luxcel Sanita Ltd | Administrative & support | 2025 |
| Luxclusive House Ltd | Information & communication | 2022 |
| Luxdrivers Ltd | Transport & logistics | 2018 |
| Luxe Beautè Ltd | Other services | 2022 |
| Luxe Building and Renovations Ltd | Construction | 2025 |
| Luxe by Minihaha & Co. Limited | Other services | 2017 |
| Luxe Cars Ltd | Transport & logistics | 2018 |
| Luxe Clean Group Limited | Administrative & support | 2025 |
| Luxe Collection 24 Limited | Hospitality | 2025 |
| Luxe Damp Proofing Ltd | Construction | 2025 |
| Luxe Decorating Ltd | Construction | 2023 |
| Luxe Event Services Ltd | Arts & recreation | 2023 |