| Lupin Dog Care LLP | | 2026 |
| Lush Homes Investments Ltd | Real estate | 2019 |
| Lusher and Lusher Limited | Professional & scientific | 2017 |
| Lushi Investment Ltd | Real estate | 2022 |
| Lushi Scaffolding Ltd | Construction | 2019 |
| Lushi's Cofee & Lounge Ltd | Hospitality | 2023 |
| Lutwyche Mews Management Company Limited | Real estate | 2021 |
| Luwex Limited | Financial services | 2024 |
| LUX Care Group Limited | Professional & scientific | 2025 |
| LUX Homes Gidea Park Limited | Real estate | 2024 |
| LUX Life Estates Ltd | Real estate | 2022 |
| LUX Living Properties Limited | Real estate | 2019 |
| LUX N Life Limited | Professional & scientific | 2018 |
| Luxaura Ltd | Transport & logistics | 2024 |
| Luxe Cleaning London Ltd | Administrative & support | 2026 |
| Luxe Design Ltd | Construction | 2025 |
| Luxe Living Reality Ltd | Real estate | 2024 |
| Luxeal Ltd | Other services | 2018 |
| LUXENO.11 Ltd | Wholesale & retail | 2021 |
| Luxera Tradex Limited | Wholesale & retail | 2021 |
| Luxore Facade UK Ltd | Construction | 2018 |
| Luxore Limited | Construction | 2009 |
| Luxos Properties Ltd | Real estate | 2018 |
| Luxury Bathroom Design Ltd | Construction | 2025 |
| Luxury Construction Services 4 YOU Ltd | Construction | 2019 |
| Luxury Design Solutions Ltd | Professional & scientific | 2024 |
| Luxury Interiors Caribbean Limited | Wholesale & retail | 2013 |
| Luxury Living Cleaning Service Ltd | Administrative & support | 2025 |
| Luxury Prize Draws Limited | Wholesale & retail | 2026 |
| Luxury Travel Solutions Limited | Transport & logistics | 2025 |
| Luzpharm Limited | Administrative & support | 2024 |
| LV Facades Ltd | Construction | 2022 |
| LV Roofing Ltd | Construction | 2023 |
| LVI Developments Ltd | Construction | 2019 |
| LVM Construction Ltd | Construction | 2013 |
| Lyah Care Limited | Health & social care | 2022 |
| Lyah Legacies Property Investments Ltd | Households | 2019 |
| Lychifoodstuffs&Delicacies Ltd | Wholesale & retail | 2025 |
| Lydan Property Ltd | Real estate | 2024 |
| Lyfex Ltd | Wholesale & retail | 2026 |
| Lyftbuddy Ltd | Information & communication | 2026 |
| Lykianway Psychotherapy Services | Health & social care | 2021 |
| Lymo Solutions Ltd | Construction | 2026 |
| LYN Beauty Ltd | Other services | 2025 |
| Lynke Group Ltd | Information & communication | 2025 |
| Lynn Connelly Recruitment Limited | Administrative & support | 2011 |
| Lzilly Ltd | Construction | 2025 |
| LÀ Padri Limited | Manufacturing | 2025 |
| L’Aesthetica Ltd | Health & social care | 2023 |
| L’Amour of London Ltd | Other services | 2023 |
| M & a Interiors Ltd | Construction | 2015 |
| M & C Driveways Limited | Construction | 2017 |
| M & J (London) Properties Limited | Real estate | 2023 |
| M & J Resources Ltd | Construction | 2019 |
| M & J Rutter Building Services Limited | Construction | 2016 |
| M & L Housing Limited | Real estate | 2021 |
| M & W Wessex Limited | Administrative & support | 1976 |
| M a Accounts Ltd | Professional & scientific | 2019 |
| M and G Property Solutions Ltd | Real estate | 2022 |
| M and S Exports UK Ltd | Wholesale & retail | 2022 |
| M Anghel Ltd | Construction | 2018 |
| M Barrett Transport Limited | Transport & logistics | 2020 |
| M Cutting Right Ltd | Other services | 2019 |
| M D Pointing Contractors Limited | Construction | 2002 |
| M Enterprises Limited | Construction | 2025 |
| M Global Capital Ltd | Information & communication | 2026 |
| M Intellect Ltd | Construction | 2019 |
| M J Wiles Ltd | Professional & scientific | 2023 |
| M K Abraham Limited | Professional & scientific | 2012 |
| M K Beddings Ltd | Administrative & support | 2024 |
| M Kaur Enterprise Limited | Real estate | 2020 |
| M Kazmi & Co Ltd | Health & social care | 2012 |
| M L Young European Transport Ltd | Transport & logistics | 2025 |
| M M Virgo Ltd | Real estate | 2025 |
| M Martins Consultancy Ltd | Professional & scientific | 2016 |
| M Miles Ltd | Real estate | 2019 |
| M R Auto Services Ltd | Wholesale & retail | 2020 |
| M V Milk Limited | Extraterritorial | 2011 |
| M W Beer Holdings Limited | Professional & scientific | 1998 |
| M Zaman and Sons Ltd | Wholesale & retail | 2023 |
| M Zara Ltd | Wholesale & retail | 2026 |
| M&A Fish Bar Ltd | Hospitality | 2026 |
| M&C Building and Maintenance Services Ltd | Construction | 2025 |
| M&E Maintenance Ltd | Administrative & support | 2023 |
| M&F Facilities Ltd | Administrative & support | 2024 |
| M&F Interiors Limited | Construction | 2017 |
| M&H Security UK Ltd | Administrative & support | 2024 |
| M&J Hospitality( UK) Ltd | Real estate | 2023 |
| M&K Fish Ltd | Real estate | 2025 |
| M&L Solution Trading Ltd | Construction | 2018 |
| M&P Shehu Buytolet Ltd | Real estate | 2026 |
| M&R Homes Ltd | Real estate | 2024 |
| M&S Legal Limited | Information & communication | 2024 |
| M&V Fuel Station Ltd | Wholesale & retail | 2020 |
| M&V Inimoi Construction Ltd | Construction | 2020 |
| M&V Legal Ltd | Professional & scientific | 2021 |
| M&Z Distribution Limited | Wholesale & retail | 2025 |
| M. Green Productions Ltd. | Arts & recreation | 2017 |
| M.A Dessertss Ltd | Manufacturing | 2024 |
| M.A. Contracts Limited | Construction | 2003 |