| Loppex Ltd | Wholesale & retail | 2010 |
| Lopson Ltd | Hospitality | 2023 |
| Lord J. Services Limited | Construction | 2009 |
| Lords of London Chauffeurs (Cars) Limited | Transport & logistics | 2018 |
| Lords Tiles Ltd | Construction | 2024 |
| Lorels Ltd | Administrative & support | 2019 |
| Lorven IT Solutions Limited | Information & communication | 2013 |
| Lotti International Ltd | Wholesale & retail | 2025 |
| Lotus Construction Group Ltd | Construction | 2021 |
| Lotus Soft Ltd | Information & communication | 2023 |
| Lotus Tuition Centre Ltd | Education | 2025 |
| LOTUS9 Property Ltd | Real estate | 2022 |
| Lotusbeautyservices Ltd | Wholesale & retail | 2020 |
| Loudwater Troutstream Hall Ltd | Construction | 2014 |
| Love ALL World Ltd | Transport & logistics | 2026 |
| Love Food and Wine Ltd | Wholesale & retail | 2026 |
| Love Samra Transportation Ltd | Transport & logistics | 2025 |
| Love Your Disease Ltd | Construction | 2016 |
| Lovely Peri Peri Chicken Ltd | Hospitality | 2023 |
| Lovely Sweet & Snacks Ltd | Wholesale & retail | 2021 |
| Lovepreet Construction Limited | Construction | 2024 |
| LOVEPREETSINGH96 Limited | Transport & logistics | 2024 |
| Lovers of the Game Ltd | Arts & recreation | 2020 |
| Lowveld Care Ltd | Public administration | 2021 |
| Loyal Cars Ltd | Wholesale & retail | 2018 |
| Loyalty Healthcare Limited | Health & social care | 2020 |
| LPK Property Group Limited | Real estate | 2025 |
| LRA Ltd | Administrative & support | 2023 |
| LS Ghotra Construction Ltd | Construction | 2025 |
| LS09 Ltd | Information & communication | 2025 |
| Lsku Property Ltd | Real estate | 2024 |
| LSM Constructions Limited | Construction | 2024 |
| LSP Building Work Ltd | Construction | 2025 |
| LSW Consultants Limited | Construction | 2019 |
| LTK Ltd | Construction | 2025 |
| LTL Top Service Ltd | Construction | 2019 |
| LTS Property Holding Ltd | Real estate | 2025 |
| Lubana Roadways Limited | Transport & logistics | 2024 |
| Lubanas Construction Ltd | Construction | 2024 |
| Lubarsch Corner Ltd | Wholesale & retail | 2025 |
| Lucanlift Ltd | Administrative & support | 2017 |
| Lucie Investments Ltd | Real estate | 2022 |
| Lucineri Limited | Households | 2025 |
| Luck Assets Ltd | Financial services | 2025 |
| Lucky 26 Limited | Real estate | 2023 |
| Lucky Food 19 Ltd | Hospitality | 2025 |
| Lucky Home Maintenance Ltd | Construction | 2025 |
| Lucky Kaur Ltd | Transport & logistics | 2016 |
| Lucon Sell Ltd | Wholesale & retail | 2018 |
| Ludocor Trans Ltd | Transport & logistics | 2026 |
| Lufthansa Technik Landing Gear Services UK Limited | Manufacturing | 1997 |
| Luggage (London) Limited | Wholesale & retail | 2010 |
| Luggage Assist Ltd | Transport & logistics | 2025 |
| Luggage Shipping Limited | Extraterritorial | 2003 |
| LUK Rendering Limited | Construction | 2016 |
| Lukas UK Machine Ltd | Manufacturing | 2023 |
| Luma Holdings Group Ltd | Wholesale & retail | 2026 |
| Lumibop Cards Limited | Manufacturing | 2026 |
| Lumina Security Ltd | Administrative & support | 2024 |
| Luminar Events Ltd | Other services | 2023 |
| Lumincity Limited | Manufacturing | 2017 |
| Lummon Ltd | Information & communication | 2022 |
| Lumora Care Ltd | Health & social care | 2026 |
| Lunair Apparel Limited | Wholesale & retail | 2025 |
| Lunar Music Ltd | Professional & scientific | 2019 |
| Lupu Transport Limited | Transport & logistics | 2023 |
| Lush Touch Limited | Wholesale & retail | 2024 |
| LUX Assets Ltd | Financial services | 2025 |
| LUX Jewels Ltd | Wholesale & retail | 2024 |
| LUX Kitchen and Bedroom Ltd | Construction | 2024 |
| LUX Luxury Limited | Wholesale & retail | 2025 |
| LUX Occasions Limited | Information & communication | 2024 |
| LUX UK Properties Limited | Real estate | 2024 |
| Luxa Health Ltd | Health & social care | 2019 |
| Luxatti Construction Ltd | Wholesale & retail | 2022 |
| Luxatti Developments Ltd | Construction | 2020 |
| Luxatti Homes Ltd | Construction | 2018 |
| Luxe Auto Mart Ltd | Wholesale & retail | 2023 |
| Luxe Stone Limited | Construction | 2026 |
| Luxedesigne Ltd | Construction | 2025 |
| Luxeline International Ltd | Wholesale & retail | 2024 |
| Luxent Motors Ltd | Wholesale & retail | 2026 |
| Luxestone Tiles Limited | Wholesale & retail | 2025 |
| Luxmirab Ltd | Real estate | 2024 |
| Luxmisun Limited | Health & social care | 2023 |
| Luxora Golden Miles Ltd | Wholesale & retail | 2024 |
| Luxshb Ltd | Construction | 2025 |
| Luxsun Services Ltd | Real estate | 2026 |
| Luxuries Property Ltd | Real estate | 2024 |
| Luxury Auto Gold Ltd | Wholesale & retail | 2025 |
| Luxury Deals Ltd | Wholesale & retail | 2025 |
| Luxury Drop Limited | Wholesale & retail | 2019 |
| Luxury Floors Limited | Other services | 2020 |
| Luxury Punjab Construction Ltd | Construction | 2024 |
| Luxury Ride Chauffeurs Ltd | Transport & logistics | 2023 |
| Luxury Tours London Ltd | Transport & logistics | 2026 |
| Luxurychaffeurservice Ltd | Transport & logistics | 2022 |
| LW Management Services Ltd | Real estate | 2024 |
| LYK Transport Ltd | Transport & logistics | 2021 |
| Lynns Knight Ltd | Wholesale & retail | 2022 |