| Love to Shop Ltd | Wholesale & retail | 2021 |
| Loveable Limited | Professional & scientific | 2016 |
| Lovelace Court (Surbiton) Management Company Limited | Households | 2021 |
| Lovell Oaks Investments Limited | Financial services | 2020 |
| Lovemypension.Com Limited | Professional & scientific | 1997 |
| Lovepodi Ltd | Wholesale & retail | 2025 |
| Lowrider Sound Limited | Information & communication | 2012 |
| Loyalcare Group Services Ltd | Health & social care | 2009 |
| LP Construction (London) Limited | Construction | 2002 |
| LP Estates Ltd | Real estate | 2026 |
| Lpic Limited | Financial services | 2022 |
| LQT Technologies Limited | Information & communication | 2024 |
| LR Pedroso Company Ltd. | Health & social care | 2023 |
| LRS Builders 2019 Limited | Construction | 2019 |
| LS Comms Ltd | Information & communication | 2015 |
| LS Star Foods Ltd | Hospitality | 2025 |
| LS Star Properties Ltd | Real estate | 2025 |
| LSC Student Services Ltd | Administrative & support | 2019 |
| LSL Auto Centre Limited | Wholesale & retail | 2014 |
| LSR Electrical Solutions Ltd | Construction | 2023 |
| Ltech Consulting Limited | Information & communication | 2017 |
| LU1966 Ltd | Agriculture & fishing | 2020 |
| Luay Construction Group Ltd | Construction | 2025 |
| Lubbesthorpe R5 Management Company Limited | Households | 2021 |
| Lucana Ltd | Hospitality | 2020 |
| Lucas AKK Ltd | Households | 2024 |
| Lucas Shop Ltd | Wholesale & retail | 2025 |
| Luciam Developments Ltd | Construction | 2019 |
| Luciam Limited | Wholesale & retail | 2022 |
| Luciam TR Ltd | Households | 2025 |
| Lucid Imaging Ltd | Manufacturing | 2022 |
| Lucio's First Class Catering Limited | Hospitality | 2014 |
| Lucioventures Limited | Wholesale & retail | 2020 |
| Luck Estates Ltd. | Real estate | 2023 |
| Luckilyyours Limited | Administrative & support | 2026 |
| LUCKTHAI23 Limited | Hospitality | 2023 |
| Lucky Cat Entertainment Limited | Arts & recreation | 2026 |
| Lucky Dale Cars Ltd | Wholesale & retail | 2016 |
| Lucky Day Industries Ltd | Information & communication | 2026 |
| Lucky Housewares Ltd | Wholesale & retail | 2025 |
| Lucky Matchdays Ltd | Administrative & support | 2024 |
| Lucky Way Cargo UK Ltd | Transport & logistics | 2024 |
| Lucy's Kitchen Limited | Hospitality | 2024 |
| Lucyl Limited | Health & social care | 2020 |
| Ludgate Hill Management Company Limited | Households | 2004 |
| Luis Borja Limited | Construction | 2019 |
| Luis Viktor Ltd | Real estate | 2021 |
| Luis-Dsg Ltd | Transport & logistics | 2026 |
| Lukomwa Enterprise Limited | Health & social care | 2016 |
| Luma Homes Ltd | Construction | 2021 |
| Lumaria Ltd | Hospitality | 2025 |
| Lumaron Limited | Information & communication | 2018 |
| Lumiere AI Limited | Information & communication | 2026 |
| Lumiere Consultancy Limited | Hospitality | 2017 |
| Lumina Clinics Ltd | Health & social care | 2024 |
| Lumina Holdings PVT Ltd | Real estate | 2026 |
| Luminate Print Ltd | Manufacturing | 2016 |
| Luminora Ltd | Wholesale & retail | 2025 |
| Lumiskin Aesthetic Academy Ltd | Professional & scientific | 2025 |
| Lumley Consulting Ltd | Professional & scientific | 2015 |
| Luna Benai Ltd | Manufacturing | 2022 |
| Luna RAE Studios Ltd | Other services | 2025 |
| Lunaluxelingerie Ltd | Wholesale & retail | 2025 |
| Lunar Aromas Ltd | Wholesale & retail | 2025 |
| Lunaris Nova Ltd | Real estate | 2025 |
| Lunasam Ltd | Health & social care | 2024 |
| Lunelivein Ltd | Other services | 2025 |
| Lushupcosmetics and Academy Limited | Other services | 2025 |
| Lushupcosmetics Ltd | Health & social care | 2018 |
| LUX 52 Limited | Health & social care | 2012 |
| Luxe DE Neige Limited | Administrative & support | 2025 |
| Luxe Sojourns Travel Ltd | Administrative & support | 2024 |
| Luxedrivefinancial Ltd | Financial services | 2024 |
| Luxeerah Limited | Manufacturing | 2025 |
| Luxehairbyt Ltd | Other services | 2021 |
| Luxelane Chauffeurs Ltd | Transport & logistics | 2024 |
| Luxevolve Ltd | Hospitality | 2025 |
| Luxorè Voeux Ltd | Wholesale & retail | 2024 |
| Luxpaving Limited | Administrative & support | 2017 |
| Luxproperty AI Ltd | Information & communication | 2026 |
| Luxuress Ltd | Other services | 2026 |
| Luxurients Ltd | Wholesale & retail | 2021 |
| Luxuriouslis Ltd | Wholesale & retail | 2019 |
| Luxury Alexandria Limited | Professional & scientific | 2025 |
| Luxury Bricks Property Group Limited | Real estate | 2023 |
| Luxury Holidays to Ltd | Administrative & support | 2010 |
| Luxury Home & Letting Ltd | Construction | 2025 |
| Luxury London Group Ltd | Construction | 2026 |
| Luxury Travel With Rebecca Limited | Administrative & support | 2025 |
| LV & GB Childcare Ltd | Health & social care | 2024 |
| LVB Construction Ltd | Construction | 2024 |
| LW Financial Ltd | Professional & scientific | 2024 |
| LWM International Ltd | Financial services | 2015 |
| LWP246 Ltd | Professional & scientific | 2020 |
| LWW Building Service Ltd | Construction | 2021 |
| LXT Holdings Ltd | Wholesale & retail | 2023 |
| LXV Enterprises Ltd | Professional & scientific | 2025 |
| LY Digital Growth Ltd | Professional & scientific | 2026 |
| LY Productions. Ltd | Information & communication | 2023 |
| Lyan Limited | Professional & scientific | 2015 |