| Luxe Roses Ltd | Wholesale & retail | 2025 |
| Luxevaro Ltd | Wholesale & retail | 2026 |
| Luxevault Gold Ltd | Manufacturing | 2026 |
| Luxlight Limited | Wholesale & retail | 2017 |
| Luxline Motors Ltd | Wholesale & retail | 2025 |
| Luxora MR Ltd | Wholesale & retail | 2025 |
| Luxstyle Living Ltd | Real estate | 2024 |
| Luxstyle Management Ltd | Real estate | 2021 |
| Luxury House London Ltd | Real estate | 2023 |
| Luxury Management Network Ltd | Hospitality | 2026 |
| Luxvora Ltd | Wholesale & retail | 2025 |
| Luxy Line Limited | Wholesale & retail | 2025 |
| LV Logistics Ltd | Transport & logistics | 2024 |
| LW Automotives Limited | Wholesale & retail | 2024 |
| LW Brickwork Limited | Construction | 2009 |
| Lwdl Ltd | Other services | 2018 |
| LXL Logistics Limited | Transport & logistics | 2025 |
| Lyburn Supplies Limited | Wholesale & retail | 2005 |
| Lycka Events and Caters Ltd | Hospitality | 2023 |
| Lycka Mallu's Kitchen Ltd | Hospitality | 2025 |
| Lydia Holdings Limited | Financial services | 2016 |
| Lymer Properties Limited | Real estate | 2010 |
| Lymer Windows and Doors Limited | Construction | 2015 |
| Lymewood Architectural Joinery Limited | Construction | 2001 |
| Lymewood Properties Limited | Construction | 2016 |
| Lymph Lumine Ltd | Arts & recreation | 2024 |
| Lyndhurst Property Limited | Real estate | 2021 |
| Lyngate Healthcare Ltd | Health & social care | 2003 |
| Lynton Holdings Limited | Wholesale & retail | 2017 |
| Lynwood Brown Limited | Manufacturing | 2011 |
| Lynxus Ltd | Extraterritorial | 2016 |
| Lyon & Co Commercial Finance 2017 Limited | Financial services | 2017 |
| Lyon & Co LLP | | 2007 |
| Lyon Homes Ltd | Real estate | 2024 |
| Lyons Power Electrical Limited | Construction | 2024 |
| M & a Investments SOT Ltd | Households | 2025 |
| M & E Property Maintenance and Management Ltd | Construction | 2024 |
| M & G B Properties Limited | Real estate | 2023 |
| M & G Harris Limited | Real estate | 2014 |
| M & G Harris Stourbridge Limited | Real estate | 2010 |
| M & G Harris Wolverhampton Limited | Real estate | 2010 |
| M & H Housing Ltd | Real estate | 2024 |
| M & J Developments (Cornwall) Ltd | Construction | 2021 |
| M & J Hurst Joinery Limited | Construction | 2005 |
| M & K Collectibles Ltd | Wholesale & retail | 2023 |
| M & L Solutions (Staffordshire) Limited | Transport & logistics | 2025 |
| M & M Industrial Maintenance Limited | Administrative & support | 2010 |
| M & M Information Technologies Limited | Information & communication | 2013 |
| M & M Lodges Limited | Real estate | 2019 |
| M & M Plumbing and GAS Services Ltd | Construction | 2019 |
| M & M Racing Ltd | Administrative & support | 2024 |
| M a Basit & Co Ltd | Wholesale & retail | 2023 |
| M a Mannion Limited | Construction | 2014 |
| M a Motors Group Ltd | Wholesale & retail | 2026 |
| M and R Yahiya Contracting Ltd | Professional & scientific | 2026 |
| M and W Engineering Limited | Professional & scientific | 2017 |
| M C Signs (NW) Ltd | Manufacturing | 2013 |
| M Club Swim Limited | Arts & recreation | 2022 |
| M Edwards Transport Limited | Transport & logistics | 2016 |
| M Ford Roofing Limited | Construction | 2023 |
| M G H Site Services Limited | Construction | 2015 |
| M G Jones Services Ltd | Administrative & support | 2020 |
| M I B Garages Limited | Wholesale & retail | 2006 |
| M I P Electrics Ltd | Administrative & support | 2017 |
| M Investment Group Limited | Financial services | 1989 |
| M J Varley Ltd | Construction | 2017 |
| M J W Engineering (UK) Ltd | Manufacturing | 2014 |
| M Kash Ltd | Wholesale & retail | 2025 |
| M Megger Transport Ltd | Transport & logistics | 2014 |
| M Myatt Limited | Wholesale & retail | 2025 |
| M P Services (Stoke) Limited | Administrative & support | 2017 |
| M Priebe Electrical Services Limited | Construction | 2026 |
| M R L Testing Services Ltd | Wholesale & retail | 2002 |
| M Rauf Ltd | Real estate | 2024 |
| M Ridgway Surfacing Ltd | Construction | 2013 |
| M S & H M ROE Limited | Other services | 2020 |
| M S Fabrics Ltd | Wholesale & retail | 2023 |
| M S ROE Limited | Administrative & support | 2017 |
| M Simpson & Sons Contracts Limited | Construction | 2020 |
| M Squad Ltd | Professional & scientific | 2025 |
| M U Plant Hire Limited | Construction | 2019 |
| M W Mechanical & Renewables Ltd | Construction | 2019 |
| M W Services SOT Ltd | Agriculture & fishing | 2021 |
| M Waimar Services (MWS) Ltd | Construction | 2018 |
| M Walton Plastering Limited | Construction | 2018 |
| M&A Autos Stoke Ltd | Wholesale & retail | 2025 |
| M&A Engineering and Consulting Ltd | Construction | 2020 |
| M&C Transport Ltd | Transport & logistics | 2019 |
| M&D Heritage Ltd | Manufacturing | 2022 |
| M&G Motors Ltd | Wholesale & retail | 2016 |
| M&K Freight Solutions Ltd | Transport & logistics | 2026 |
| M&K Solution Limited | Transport & logistics | 2020 |
| M&L UK Online Ltd | Professional & scientific | 2021 |
| M&M Building Projects (Stoke-On-Trent) Limited | Construction | 2023 |
| M&M Consultancy Services Ltd | Administrative & support | 2026 |
| M&M Designs Ltd | Manufacturing | 2024 |
| M&M Driveways Limited | Construction | 2020 |
| M&M Flooring and Furniture Solutions Ltd | Wholesale & retail | 2025 |
| M&M Industrial Maintenance Holdings Ltd | Financial services | 2019 |
| M&M Investment Holdings Limited | Real estate | 2025 |