| Luma Estates Limited | Real estate | 2025 |
| Lumadock Ltd | Information & communication | 2024 |
| Lumalite Limited | Arts & recreation | 2022 |
| Lumata (UK) Ltd | Other services | 2010 |
| Lumera Jewellery Ltd | Manufacturing | 2025 |
| Lumi Creativity Ltd | Extraterritorial | 2008 |
| Lumilinks Group Ltd | Information & communication | 2018 |
| Lumin Consult Ltd | Professional & scientific | 2025 |
| Lumina Limited | Real estate | 2015 |
| Lumina Plates Ltd | Wholesale & retail | 2024 |
| Luminary Networks Ltd | Professional & scientific | 2024 |
| Luminous Collective Limited | Information & communication | 2024 |
| Luminous Integrations Ltd | Wholesale & retail | 2026 |
| Lumis Holdings Ltd | Financial services | 2024 |
| Lumiu Limited | Professional & scientific | 2003 |
| Lumière ET Co. Ltd | Arts & recreation | 2022 |
| Lumo One Ltd | Information & communication | 2017 |
| Lumora Creative Ltd | Professional & scientific | 2026 |
| Lumora Essence Ltd | Wholesale & retail | 2026 |
| Lumora Health Ltd | Wholesale & retail | 2026 |
| Lumozek Ltd | Information & communication | 2021 |
| Lumus Electrical Ltd | Construction | 2026 |
| Lumyn-Group Limited | Wholesale & retail | 2026 |
| Luna Film Productions Limited | Information & communication | 2023 |
| Luna Jack Ltd | Hospitality | 2022 |
| Luna London Candles Limited | Manufacturing | 2020 |
| Luna Star Ltd | Construction | 2019 |
| Lunae Rosa Limited | Extraterritorial | 2023 |
| Lunalogix Ltd | Transport & logistics | 2026 |
| Lunar Technology Limited | Information & communication | 2023 |
| LUNCHMUNCH4KIDZ Limited | Health & social care | 2015 |
| Lund Osler Estates Ltd | Real estate | 2023 |
| Lunera Medical Clinics Ltd | Health & social care | 2016 |
| Lungu Cladding Ltd | Construction | 2024 |
| LUO Export Limited | Wholesale & retail | 2025 |
| Lupa Fine Art Limited | Other services | 2015 |
| Lupa Law Ltd | Health & social care | 2025 |
| Lupa Management Services Limited | Professional & scientific | 1997 |
| Lupin Garden Services Limited | Administrative & support | 2010 |
| Lupu Pro Cars Detailing Ltd | Wholesale & retail | 2025 |
| Lupxury Ltd | Wholesale & retail | 2019 |
| Lura Water Ltd | Manufacturing | 2026 |
| Lury Construct Ltd | Transport & logistics | 2020 |
| Lusambu Services Limited | Construction | 2025 |
| Lushi Developers Ltd | Construction | 2019 |
| Lushify Ltd | Professional & scientific | 2024 |
| Lushlane Limited | Wholesale & retail | 2020 |
| Lussi Property Investments Ltd | Real estate | 2022 |
| Lusso Tiles Ltd | Construction | 2024 |
| Lutetium Limited | Health & social care | 2018 |
| Luton Trade Centre Limited | Wholesale & retail | 2005 |
| LUV Homes Limited | Real estate | 2025 |
| Luvive London Ltd | Extraterritorial | 2019 |
| LUX Coffee Ltd | Manufacturing | 2022 |
| Luxam Limited | Professional & scientific | 2009 |
| Luxceed Capital Limited | Information & communication | 2025 |
| Luxe Haven London Limited | Real estate | 2024 |
| Luxe Learn Ltd | Administrative & support | 2024 |
| Luxe Property Partners Limited | Real estate | 2023 |
| Luxecellence Limited | Wholesale & retail | 2020 |
| Luxed by D Ltd | Wholesale & retail | 2026 |
| Luxeloom Jewels Ltd | Wholesale & retail | 2025 |
| Luxemi Limited | Wholesale & retail | 2026 |
| Luxenza Pro Ltd | Wholesale & retail | 2026 |
| Luxerubi Ltd | Wholesale & retail | 2026 |
| Luxnis Catering Ltd | Hospitality | 2024 |
| Luxnis Property Ltd | Real estate | 2025 |
| Luxor Enterprises UK Ltd | Real estate | 2025 |
| Luxor Hair Salon Ltd | Other services | 2019 |
| Luxor Property Solutions Ltd | Real estate | 2020 |
| Luxor Real Assets Ltd | Real estate | 2021 |
| Luxsories Limited | Extraterritorial | 2014 |
| Luxstones Ltd | Construction | 2017 |
| Luxuber Limited | Transport & logistics | 2022 |
| Luxuria London Ltd | Manufacturing | 2017 |
| Luxurious Beauty Salon Ltd | Other services | 2024 |
| Luxurist Limited | Information & communication | 2024 |
| Luxury Beauty Services Ltd | Other services | 2026 |
| Luxury Boat Rent Limited | Transport & logistics | 2019 |
| Luxury Cars in London Ltd | Transport & logistics | 2018 |
| Luxury Hire Direct Ltd | Administrative & support | 2020 |
| Luxury Hotels Corporation Limited | Professional & scientific | 2017 |
| Luxury Media Limited | Professional & scientific | 2013 |
| Luxury On-Time Minibuses Ltd | Transport & logistics | 2024 |
| Luxury Paving & Landscapes Limited | Construction | 2021 |
| Luxury Professional Decorators Ltd | Construction | 2024 |
| Luxury Restore Services Ltd | Construction | 2020 |
| Luxury Star Ltd | Other services | 2016 |
| Luxury Watches Limited | Wholesale & retail | 2020 |
| Luxx Cars Ltd | Administrative & support | 2025 |
| Luxx-Life Limited | Information & communication | 2018 |
| Luxxy Motors Limited | Wholesale & retail | 2024 |
| Luxy Services Ltd | Other services | 2025 |
| Luxzai Ltd | Wholesale & retail | 2025 |
| LV Veterinary Services Limited | Professional & scientific | 2016 |
| LVS Grand Property Ltd | Construction | 2018 |
| LW Development Group Ltd | Construction | 2025 |
| LWM Solutions Limited | Professional & scientific | 2012 |
| LX Executive Chauffeurs Ltd | Transport & logistics | 2026 |
| LX Nail LAB Ltd | Other services | 2025 |