| Lrkr Ltd | Information & communication | 2025 |
| LT Express Ltd | Wholesale & retail | 2023 |
| Ltd Living the Dream Ltd | Construction | 2021 |
| Lubna's Limited | Wholesale & retail | 2012 |
| Luca Assets Ltd | Real estate | 2026 |
| Lucas & Peter Maintenance Ltd | Construction | 2016 |
| Lucky & Aroras Property Ltd | Real estate | 2025 |
| Ludhiani Builders Limited | Construction | 2025 |
| Lukas Consultancy Ltd | Administrative & support | 2018 |
| Lukmar Homes Ltd | Other services | 2022 |
| Lula's Store Ltd | Wholesale & retail | 2019 |
| Lumaa Tech Ltd | Information & communication | 2025 |
| Lumen Retail Ltd | Wholesale & retail | 2025 |
| Lumiere X Medicals UK Ltd | Wholesale & retail | 2025 |
| Lumon Investments Limited | Hospitality | 2025 |
| Lushy Gardens Ltd | Administrative & support | 2025 |
| Lussovesto Limited | Wholesale & retail | 2025 |
| Luthra Limited | Information & communication | 2019 |
| Luthringer Limited | Professional & scientific | 2021 |
| Luton HOO Park Limited | Hospitality | 1998 |
| Lutsiv Builders Ltd | Construction | 2025 |
| Luvano Estates Limited | Real estate | 2025 |
| LUX Auto Solutions Ltd | Wholesale & retail | 2024 |
| LUX Property Limited | Real estate | 2014 |
| Luxar Properties Ltd | Real estate | 2022 |
| Luxe Demolition Ltd | Construction | 2023 |
| Luxe Design and Build Group Ltd | Construction | 2022 |
| Luxe Products Limited | Wholesale & retail | 2025 |
| Luxe Signature Events Ltd | Administrative & support | 2025 |
| Luxe Stop Ltd | Real estate | 2026 |
| Luxevue Motors Ltd | Wholesale & retail | 2023 |
| Luxmont Construction Ltd | Construction | 2026 |
| Luxskin London Ltd | Wholesale & retail | 2024 |
| Luxury Event Solutions Ltd | Administrative & support | 2025 |
| Luxury Furniture Direct Limited | Real estate | 2020 |
| Luxury London Chauffeurs Limited | Transport & logistics | 2019 |
| Luxus Cars Limited | Transport & logistics | 2026 |
| Lvuk Group Ltd | Real estate | 2017 |
| LWO Consultancy Ltd | Construction | 2020 |
| LWO Group Limited | Professional & scientific | 2023 |
| Lyddon Limited | Construction | 2019 |
| Lyme Studios Ltd | Professional & scientific | 2019 |
| Lyon Debeaker Limited | Manufacturing | 2023 |
| Lyra Brands Ltd | Wholesale & retail | 2024 |
| Lyreco Properties Ltd | Real estate | 2016 |
| M & C Property Investments Limited | Real estate | 2021 |
| M & L Technology Ltd | Information & communication | 2016 |
| M & M Local Limited | Wholesale & retail | 2025 |
| M & T (Whitton) Ltd | Professional & scientific | 2025 |
| M & Z Direct Ltd | Professional & scientific | 2007 |
| M a Taleb Properties Ltd | Real estate | 2025 |
| M B Developers Ltd | Construction | 2026 |
| M HT T Ltd | Hospitality | 2022 |
| M I T Support Services Limited | Information & communication | 2015 |
| M K Food & Wine Limited | Wholesale & retail | 2022 |
| M N Beauty Supply and Imports and Exports and Cargos Company Ltd | Wholesale & retail | 2023 |
| M N International Beauty Supply and Imports and Exports and Cargos Company Ltd | Wholesale & retail | 2025 |
| M N International Beauty Supply Ltd | Wholesale & retail | 2026 |
| M N Malik Property Partnership LLP | | 2020 |
| M Onetara Ltd | Wholesale & retail | 2026 |
| M Pinto Ltd | Hospitality | 2013 |
| M R Construction Ltd | Construction | 2015 |
| M S Guled Healthcare Ltd | Health & social care | 2020 |
| M Siddique Consultants Limited | Other services | 2009 |
| M T DAR Consultancy Ltd | Real estate | 2021 |
| M Transc Services Limited | Information & communication | 2020 |
| M Usayd Limited | Wholesale & retail | 2025 |
| M&A Ghadeer Ltd | Wholesale & retail | 2012 |
| M&D Plumbing and Heating Solutions Ltd | Construction | 2024 |
| M&E Intelligence Ltd | Professional & scientific | 2024 |
| M&J Construction London Ltd | Construction | 2022 |
| M&M Fabrica Ltd | Manufacturing | 2020 |
| M&R Home Developments Limited | Real estate | 2025 |
| M&S Creative Studio Ltd | Wholesale & retail | 2026 |
| M&V Drinks Limited | Wholesale & retail | 2020 |
| M.C.M.A Transport Limited | Transport & logistics | 2019 |
| M.S. & Sons Roofing Services Ltd | Construction | 2022 |
| M2B Logistics Ltd | Transport & logistics | 2019 |
| M2B Pro Wash Ltd | Wholesale & retail | 2025 |
| M3 Motors Limited | Wholesale & retail | 2022 |
| M381 Limited | Wholesale & retail | 2025 |
| M4 Mobile Phone Accessories Ltd | Wholesale & retail | 2020 |
| M4 Tyres Mobile Services Ltd | Wholesale & retail | 2023 |
| M4 Tyres Modification Ltd | Wholesale & retail | 2023 |
| M4 Tyres UK Ltd | Administrative & support | 2016 |
| MA & Co Solutions Ltd | Professional & scientific | 2024 |
| MA Express Ltd | Administrative & support | 2025 |
| Ma.Loft Ltd | Construction | 2023 |
| Maala Fashion Limited | Wholesale & retail | 2023 |
| Maalblue Associates Ltd | Administrative & support | 2015 |
| Maalik Holdings Limited | Financial services | 2025 |
| Maalish - the Massage Clinic Ltd | Health & social care | 2022 |
| Maan Heating & Plumbing Ltd | Construction | 2016 |
| Maan Road Transport Ltd | Transport & logistics | 2025 |
| Maan UK Courier Ltd | Transport & logistics | 2023 |
| Maarij Enterprise Limited | Financial services | 2009 |
| Maaz London Ltd | Transport & logistics | 2025 |
| MAB Karate Ltd | Education | 2024 |
| Mabk Investments Ltd | Real estate | 2021 |
| Mabourne Court Freehold Management Limited | Households | 2018 |