| Luckgate (UK) Limited | Wholesale & retail | 2008 |
| Luckgate Properties Ltd | Real estate | 2020 |
| Lucky 2026 Ltd | Hospitality | 2026 |
| Lucky EAT Ltd | Hospitality | 2025 |
| Lucky Security Services Ltd | Administrative & support | 2021 |
| Ludaloco Ltd | Arts & recreation | 2023 |
| Lumb Bros.(Scrap Metals)Limited | Manufacturing | 1964 |
| Lumen Windows Installations Ltd | Administrative & support | 2019 |
| Luminous Transformational Coaching Ltd | Health & social care | 2021 |
| Luminspire CIC | Education | 2025 |
| Lumonaut Limited | Information & communication | 2026 |
| Luna Textiles Ltd | Manufacturing | 2014 |
| Lunexiq Ltd | Information & communication | 2025 |
| Luqmann Ltd | Wholesale & retail | 2019 |
| Lusail Prime Ltd | Real estate | 2024 |
| Luthenetwork Ltd | Wholesale & retail | 2025 |
| Luumax Limited | Wholesale & retail | 2021 |
| LUV Desserts Ltd | Hospitality | 2024 |
| LUV2NV.COM Limited | Wholesale & retail | 2009 |
| LUX Decor Ltd | Construction | 2026 |
| LUX Enterprise Ltd | Transport & logistics | 2024 |
| LUX Ferrus Ltd | Information & communication | 2012 |
| Luxe Attire & Wardrobe Ltd | Wholesale & retail | 2025 |
| Luxe Cafe Limited | Hospitality | 2021 |
| Luxe Design & Interior Limited | Construction | 2025 |
| Luxe Retreat Counselling Ltd | Other services | 2026 |
| Luxe Ventures Ltd | Administrative & support | 2025 |
| Luxelane Ltd | Wholesale & retail | 2026 |
| Luxelivingplus Ltd | Manufacturing | 2023 |
| Luxentra Global Limited | Wholesale & retail | 2025 |
| Luxlane Executives Ltd | Transport & logistics | 2026 |
| Luxurious Fashion Limited | Wholesale & retail | 2025 |
| Luxuryspends Ltd | Wholesale & retail | 2025 |
| Lvl’Z Barbers Ltd | Other services | 2025 |
| LW Mediation Limited | Professional & scientific | 2015 |
| LW Paving & Landscapes Ltd | Administrative & support | 2018 |
| Lwcsl Holdings Limited | Financial services | 2023 |
| LXN Homes Ltd | Real estate | 2025 |
| Lyfe Social Limited | Professional & scientific | 2017 |
| Lyla Property Ltd Ltd | Real estate | 2021 |
| Lynch Estates Ltd | Real estate | 2025 |
| Lynch Hvac & Fabrication Ltd | Other services | 2023 |
| Lynn Melia Limited | Professional & scientific | 2016 |
| Lynx Scientific Limited | Extraterritorial | 2024 |
| Lynx Securities Limited | Extraterritorial | 2024 |
| Lysander Living Ltd | Real estate | 2025 |
| LZ Media Ltd | Professional & scientific | 2017 |
| LZN Beauty Limited | Other services | 2025 |
| M & a Logistics Services Ltd | Transport & logistics | 2025 |
| M & a Systems Ltd | Energy | 2012 |
| M & J Clarke Commercial Ltd | Real estate | 2025 |
| M & J Clarke Properties Limited | Real estate | 2018 |
| M & L Financial Ltd | Financial services | 2013 |
| M & N Mini Market Limited | Wholesale & retail | 2016 |
| M & W Business Solutions Limited | Administrative & support | 2025 |
| M a a Optical Limited | Public administration | 2022 |
| M a UK Construction Ltd | Construction | 2023 |
| M a Yards Ltd | Real estate | 2024 |
| M Bukhari Ltd | Financial services | 2025 |
| M C Kitchen & Building Contractors Ltd | Construction | 2023 |
| M Connolly Managed Services Ltd | Real estate | 2025 |
| M Davies Deliveries Ltd | Transport & logistics | 2026 |
| M Dawson Electrical Ltd | Construction | 2025 |
| M G Legal Services Limited | Real estate | 2013 |
| M G Whitwell Ltd | Agriculture & fishing | 2013 |
| M I Fashion Bradford Ltd | Wholesale & retail | 2022 |
| M I Investment NW Ltd Ltd | Real estate | 2022 |
| M J Rajas Limited | Hospitality | 2025 |
| M J T Cocktails Ltd | Hospitality | 2023 |
| M M Builders & Landscape Ltd | Construction | 2022 |
| M M Legal Services (NW) Limited | Professional & scientific | 2019 |
| M P & B Management Services Ltd | Professional & scientific | 2023 |
| M R Joinery Ltd | Construction | 2016 |
| M S (Rochdale) Limited | Construction | 2022 |
| M S Bains Constructions Ltd | Construction | 2025 |
| M S G Accountants Limited | Professional & scientific | 2005 |
| M S Sheikh Ltd | Health & social care | 2016 |
| M&A MOT & Repair Centre Ltd | Wholesale & retail | 2022 |
| M&A Travel Services Limited | Administrative & support | 2021 |
| M&Ac Ltd | Real estate | 2026 |
| M&Aessentials Ltd | Wholesale & retail | 2025 |
| M&F Kitchens Ltd | Extraterritorial | 2017 |
| M&H Builder Solutions (NW) Ltd | Construction | 2023 |
| M&N Quality Construction Limited | Construction | 2019 |
| M&S GAS and Heating Ltd | Construction | 2024 |
| M&S Retail Tyres Ltd | Manufacturing | 2014 |
| M-N for People Limited | Wholesale & retail | 2025 |
| M. Haidery & Sons Limited | Real estate | 2021 |
| M. J. Cotterill Solutions Limited | Financial services | 2013 |
| M. Tech Fibres Ltd | Wholesale & retail | 2020 |
| M.A MOT Centre Limited | Professional & scientific | 2013 |
| M.A Siddiqui Medical Ltd | Health & social care | 2022 |
| M.A.P.G Consultancy Limited | Administrative & support | 2016 |
| M.H.A Enterprises Ltd | Wholesale & retail | 2022 |
| M.H.A Foods Ltd | Wholesale & retail | 2024 |
| M.N. Trimmings Ltd | Wholesale & retail | 2020 |
| M.T. Manuals Limited | Professional & scientific | 2004 |
| M.T. Shipping Ltd | Transport & logistics | 2009 |
| M.Y Car Coding Ltd | Wholesale & retail | 2020 |
| M6 Theatre Company Limited | Arts & recreation | 1977 |