| Luton Motor City Ltd | Wholesale & retail | 2018 |
| Luton Motor Hub Ltd | Wholesale & retail | 2025 |
| Luton Motorbikes Limited | Wholesale & retail | 2024 |
| Luton Motors Limited | Wholesale & retail | 2019 |
| Luton Mots Ltd | Wholesale & retail | 2015 |
| Luton on Film Limited | Information & communication | 2016 |
| Luton Parish Clubs Community Interest Company | Hospitality | 2019 |
| Luton Photography Ltd | Professional & scientific | 2026 |
| Luton Platinum Travels Ltd | Transport & logistics | 2024 |
| Luton Plumbing & Heating Ltd | Wholesale & retail | 2017 |
| Luton Plumbing Centre Limited | Construction | 2020 |
| Luton Pool Club Limited | Arts & recreation | 2025 |
| Luton Properties (Beds) Ltd | Real estate | 2023 |
| Luton Properties Limited | Hospitality | 2016 |
| Luton Property Developments Limited | Hospitality | 2007 |
| Luton Property Investment Ltd | Real estate | 2014 |
| Luton Property Limited | Real estate | 2021 |
| Luton Property Management Ltd | Real estate | 2026 |
| Luton Property Solutions Ltd | Real estate | 2024 |
| Luton Removals Ltd | Transport & logistics | 2022 |
| Luton Rights Limited | Administrative & support | 2006 |
| Luton Road Cars Ltd | Wholesale & retail | 2020 |
| Luton Sabjibazar Limited | Wholesale & retail | 2025 |
| Luton Safe Deposit Centre Limited | Administrative & support | 2016 |
| Luton Sales and Lettings Ltd | Real estate | 2018 |
| Luton Security Ltd | Financial services | 2026 |
| Luton Shomiti Limited | Real estate | 2021 |
| Luton Skills Limited | Other services | 2024 |
| Luton Skyline Cars Limited | Transport & logistics | 2024 |
| Luton Spice HUT Limited | Hospitality | 2024 |
| Luton Styler Limited | Other services | 2015 |
| Luton TAE Kwon-Do Fighters Limited | Education | 2023 |
| Luton Taxis Group Ltd | Transport & logistics | 2026 |
| Luton Taxis Ltd | Other services | 2010 |
| Luton Tiles Outlet Ltd | Wholesale & retail | 2019 |
| Luton Total Wellbeing CIC | Public administration | 2020 |
| Luton Town Builders Limited | Construction | 2024 |
| Luton Town FC Community Trust | Arts & recreation | 2008 |
| Luton Town Fish & Chips Ltd | Hospitality | 2013 |
| Luton Town Football Club 2020 Ltd | Arts & recreation | 2007 |
| Luton Town Islamic and Cultural Centre C.I.C. | Education | 2023 |
| Luton Travel in Limited | Transport & logistics | 2023 |
| Luton Travel Service Limited | Administrative & support | 2026 |
| Luton Turkish Delight Limited | Hospitality | 2016 |
| Luton Ultrasound Limited | Health & social care | 2024 |
| Luton Urban Grill Ltd | Hospitality | 2019 |
| Luton Vehicle Rentals Limited | Administrative & support | 2017 |
| Luton's Most Strongest Ltd | Wholesale & retail | 2019 |
| LUTON247AIRPORTPARKING Ltd | Administrative & support | 2012 |
| Lutonbays Ltd | Wholesale & retail | 2024 |
| Lutoncakes Ltd | Wholesale & retail | 2025 |
| Lutoncarparks Ltd | Other services | 2024 |
| Lutoncleaning Ltd | Administrative & support | 2025 |
| Lutonestateandlettings Ltd | Households | 2012 |
| Lutonhomes Ltd | Real estate | 2019 |
| Lutonstar Supermarket Ltd | Wholesale & retail | 2019 |
| Lutonturbos Limited | Wholesale & retail | 2018 |
| Lutontyres Ltd | Wholesale & retail | 2020 |
| Luvmore LLP | | 2022 |
| LUX Levels Ltd | Manufacturing | 2022 |
| LUX Lifestyle Management Ltd | Other services | 2014 |
| LUX Royale Ltd | Wholesale & retail | 2025 |
| LUX Travel and Tours Ltd | Transport & logistics | 2025 |
| Luxafar Ltd | Real estate | 2019 |
| Luxcrete Limited | Construction | 2007 |
| Luxe Domestic and Commercial Cleaning Limited | Administrative & support | 2025 |
| Luxe Healthcare Ltd | Health & social care | 2025 |
| Luxe Living 2023 Limited | Real estate | 2023 |
| Luxe Nails on Wheels Ltd | Other services | 2026 |
| Luxeartisans Ltd | Wholesale & retail | 2024 |
| Luxera Motors Limited | Wholesale & retail | 2025 |
| Luxio Luxio Limited | Construction | 2025 |
| Luxivo Ltd | Information & communication | 2024 |
| Luxono Limited | Wholesale & retail | 2025 |
| Luxor Improveasy Ltd | Administrative & support | 2019 |
| Luxora Build Limited | Construction | 2026 |
| Luxora Executive Motors Ltd | Wholesale & retail | 2024 |
| Luxport Limited | Transport & logistics | 2025 |
| Luxurious Housing Ltd | Real estate | 2024 |
| Luxury Butlers Limited | Wholesale & retail | 2019 |
| Luxury Cadeau Limited | Wholesale & retail | 2023 |
| Luxury Loft Conversions Limited | Construction | 2025 |
| Luxury Management Ltd | Professional & scientific | 2015 |
| Luxury Nails 209 Ltd | Other services | 2021 |
| Luxury Nails 24C Ltd | Other services | 2024 |
| Luxury Nails 40 Ltd | Other services | 2023 |
| Luxury Trips Limited | Administrative & support | 2025 |
| Luxury Vehicle Rental Ltd | Wholesale & retail | 2022 |
| Luxurystairs Limited | Construction | 2017 |
| Luxx Ltd | Wholesale & retail | 2025 |
| LV Accounting Ltd | Professional & scientific | 2023 |
| LVD Trans Ltd | Transport & logistics | 2024 |
| LVH Motors UK Ltd | Wholesale & retail | 2025 |
| Lweya Health Care Services Limited | Health & social care | 2022 |
| LWH Electrical Services Ltd | Manufacturing | 2024 |
| LXM Legal Limited | Professional & scientific | 2024 |
| Lyes Sourcing House Ltd | Wholesale & retail | 2012 |
| Lyft Line Ltd | Transport & logistics | 2023 |
| Lygerway Services Limited | Health & social care | 2023 |
| Lykke London Limited | Wholesale & retail | 2021 |