| Loved by DA Limited | Wholesale & retail | 2024 |
| Lovegrown Limited | Real estate | 2020 |
| Lovejet Ltd | Wholesale & retail | 2004 |
| Lovejojo Ltd | Wholesale & retail | 2024 |
| Loveland Forestry & Fencing Ltd | Administrative & support | 2024 |
| Loveland Real Estate Ltd | Real estate | 2020 |
| Lowenhayes Property Development Limited | Real estate | 2021 |
| Lowenhayes Property Investment Limited | Real estate | 2021 |
| Lower House RTM Company Limited | Households | 2018 |
| Lowlands Financial Inclusion Limited | Professional & scientific | 2024 |
| Lowther Court Limited | Real estate | 2007 |
| LP Belts Ltd | Wholesale & retail | 2013 |
| LPJ Properties Management Ltd | Real estate | 2015 |
| LPM Motorsport Ltd | Arts & recreation | 2026 |
| Lpod Academy Ltd | Education | 2016 |
| Lqsh Ltd | Hospitality | 2025 |
| LR Daniels Consultancy Limited | Professional & scientific | 2025 |
| Lrcju Ltd | Health & social care | 2024 |
| LRE Site 1 Ltd | Real estate | 2025 |
| LRG Hopa Holdings Ltd | Financial services | 2026 |
| LRG Motor Services Limited | Wholesale & retail | 2012 |
| LRT Properties Limited | Real estate | 2017 |
| LS Bodyshop Ltd | Wholesale & retail | 2016 |
| LS Stewart Property Limited | Real estate | 2020 |
| LSJ Group Limited | Financial services | 2024 |
| Lspc Design & Build Limited | Construction | 2020 |
| Lspc Holdings Limited | Professional & scientific | 2015 |
| LSR Productions Ltd | Other services | 2020 |
| LSS Capital Limited | Administrative & support | 2016 |
| Lsyh Properties Limited | Real estate | 2025 |
| LTC Developments Limited | Construction | 2018 |
| Ltdm Drive Limited | Transport & logistics | 2025 |
| Lucara's Limited | Administrative & support | 2020 |
| Lucas Home Developments Limited | Construction | 2017 |
| Lucas Kaminski Ltd | Transport & logistics | 2018 |
| Lucia (Investments) Limited | Real estate | 2023 |
| Lucine Training Ltd | Education | 2025 |
| Luckie Foot Clinic Limited | Health & social care | 2021 |
| Luckiloo Ltd | Arts & recreation | 2026 |
| Luckpot Giveaways Limited | Arts & recreation | 2022 |
| Lucky 19 Ltd | Real estate | 2017 |
| Lucky Devil Tattoo Ltd | Other services | 2024 |
| Lucky Feat CIC | Wholesale & retail | 2019 |
| Lucky Fingers Ltd | Administrative & support | 2022 |
| Lucky Inn Takeaway Limited | Hospitality | 2017 |
| Lucky One Paris Limited | Wholesale & retail | 2025 |
| Lucy's Hill Freehold Limited | Households | 2009 |
| Ludis Sports Tech Ltd | Manufacturing | 2026 |
| Luimneach Limited | Professional & scientific | 2022 |
| Luiz Premier Homes Limited | Real estate | 2023 |
| Luka Homes Limited | Real estate | 2015 |
| Lukama Ltd | Financial services | 2013 |
| Lukas & Solutions Ltd. | Construction | 2018 |
| Lukaszjestonline Ltd | Wholesale & retail | 2024 |
| Luke Oliver Clive Harrison Ltd | Extraterritorial | 2024 |
| Lulu Ventures Ltd | Wholesale & retail | 2026 |
| Lulworth Court RTM Company Limited | Households | 2026 |
| Lulworth Cove Kiosk Ltd | Hospitality | 2020 |
| Lulworth Lodge Dorset Limited | Hospitality | 2021 |
| Lumaluna Clinic Limited | Extraterritorial | 2024 |
| Lume Furniture Ltd | Wholesale & retail | 2021 |
| Lume London Ltd | Administrative & support | 2021 |
| Luminar Consult Limited | Information & communication | 2024 |
| Luminea Creative Ltd | Information & communication | 2026 |
| Lummy Ltd | Information & communication | 2024 |
| Luna Cycle Limited | Wholesale & retail | 2018 |
| Lunch'D Limited | Manufacturing | 2014 |
| Lunchee Ltd | Extraterritorial | 2017 |
| Lush Distribution Limited | Professional & scientific | 2011 |
| Lush Global Digital Limited | Other services | 2017 |
| Lush Heating Ltd | Construction | 2010 |
| Lush Retail Limited | Wholesale & retail | 1995 |
| Lustrous Cloth Ltd | Wholesale & retail | 2024 |
| Lustrous Lifestyle Ltd | Manufacturing | 2026 |
| Lustrum Hall Management Company Limited | Households | 2006 |
| Lutosshop Ltd | Wholesale & retail | 2025 |
| Luverra Ltd | Wholesale & retail | 2024 |
| Luvio Ltd | Professional & scientific | 2025 |
| LUX by Nessa Ltd | Wholesale & retail | 2024 |
| Luxan Infrastructure Ltd | Construction | 2023 |
| Luxara Ltd | Wholesale & retail | 2024 |
| Luxart Gift Shop Ltd | Manufacturing | 2024 |
| Luxcar Group Audi-Parts Ltd | Wholesale & retail | 2020 |
| Luxe Empire Ltd | Wholesale & retail | 2025 |
| Luxe Hair Studio Ltd | Other services | 2019 |
| Luxe Living Properties Ltd | Real estate | 2025 |
| Luxe Properties (Dorset) Limited | Real estate | 2024 |
| Luxe XV Events Limited | Professional & scientific | 2025 |
| Luxfield Ltd | Real estate | 2019 |
| Luxmode Limited | Manufacturing | 2018 |
| Luxury and Prestige Holdings Limited | Financial services | 2026 |
| Luxury and Prestige Realty Ltd | Real estate | 2016 |
| Luxury Portal Ltd | Wholesale & retail | 2018 |
| Luxvision Limited | Wholesale & retail | 1999 |
| LV8 Media Ltd | Extraterritorial | 2019 |
| LVC Digital Ltd | Information & communication | 2025 |
| Lvrsnfrnds Ltd | Administrative & support | 2019 |
| LW Spray Rendering Ltd | Construction | 2025 |
| LWS Construction Ltd | Construction | 2018 |
| LWS Property Developments Ltd | Real estate | 2025 |