| LPD Software Testing Consultancy Limited | Professional & scientific | 2011 |
| LR Hospitality (Shrewsbury) Limited | Hospitality | 2025 |
| LR Hospitality Ltd | Hospitality | 2021 |
| LR Procurement Ltd | Professional & scientific | 2023 |
| LRE Events Ltd | Arts & recreation | 2026 |
| Lrhurst Ltd | Information & communication | 2023 |
| LRR Lettings Ltd | Real estate | 2025 |
| LS Engineering Shropshire Limited | Construction | 2008 |
| LS Immigration Ltd | Administrative & support | 2019 |
| LSB Motors Ltd | Wholesale & retail | 2025 |
| LSC Electrical Engineering Limited | Professional & scientific | 2024 |
| LTW Property Services Ltd | Manufacturing | 2026 |
| Lubna Cosmetics Ltd | Wholesale & retail | 2025 |
| Lucas Smart Repairs Ltd | Wholesale & retail | 2016 |
| Lucas Transport (Midlands) Ltd | Transport & logistics | 2020 |
| Lucatrans Ltd | Transport & logistics | 2018 |
| Luceco Holdings Limited | Professional & scientific | 2004 |
| Luceco PLC | Manufacturing | 2004 |
| Luceco UK Limited | Wholesale & retail | 1988 |
| Luchmed Services Ltd | Health & social care | 2022 |
| Lucy MAE Hair Limited | Other services | 2014 |
| Luft Technologies Ltd | Professional & scientific | 2014 |
| Lugo Contracting Ltd | Other services | 2019 |
| Lukasis Ltd | Wholesale & retail | 2019 |
| Luke & Olivia Enterprises Ltd | Real estate | 2023 |
| Luke.Tech Ltd | Information & communication | 2023 |
| Lumen ILS Engineering Limited | Professional & scientific | 2026 |
| Lumicom Limited | Other services | 2005 |
| Lumidafel Limited | Transport & logistics | 2026 |
| Lumina Developments Ltd | Construction | 2025 |
| Lusso Aesthetics Ltd | Other services | 2016 |
| Lusso Estates Limited | Real estate | 2020 |
| Lutass Limited | Wholesale & retail | 2025 |
| Luxe Carz Limited | Transport & logistics | 2024 |
| Luxel London Limited | Wholesale & retail | 2025 |
| LVN Health Ltd | Health & social care | 2023 |
| LW Medical Services Ltd | Health & social care | 2025 |
| LWB Consulting Limited | Information & communication | 2024 |
| Lyfbar Ltd | Hospitality | 2018 |
| Lyndsey's Handy Childminding Service Ltd | Health & social care | 2026 |
| Lynn Griffiths Hobbs Limited | Extraterritorial | 2013 |
| Lynn Hobbs Limited | Administrative & support | 2013 |
| Lynn's Bakery Ltd | Manufacturing | 2021 |
| Lyreco UK Limited | Wholesale & retail | 1947 |
| LZ Triple Investments Ltd | Real estate | 2026 |
| M & Hanna Ltd | Real estate | 2023 |
| M & J Lifting Ltd | Construction | 2012 |
| M & J Morris Ltd | Transport & logistics | 2025 |
| M & J Richards Holdings Limited | Financial services | 2006 |
| M & K Asset Management Limited | Extraterritorial | 2009 |
| M & M Alloys Limited | Other services | 2001 |
| M a Bufton and Sons Limited | Manufacturing | 2003 |
| M a Bufton Holdings Limited | Financial services | 2018 |
| M Cowling Ltd | Professional & scientific | 2026 |
| M Darrall Accountants Limited | Professional & scientific | 2013 |
| M Electrical (Electrical Contractor) Ltd | Construction | 2023 |
| M H Department Ltd | Wholesale & retail | 2016 |
| M Henefer Property Ltd | Real estate | 2022 |
| M J Solpac Limited | Manufacturing | 2000 |
| M K Psychology Services Limited | Professional & scientific | 2022 |
| M Lamb Property Group Ltd | Real estate | 2024 |
| M Maheshwari Limited | Health & social care | 2024 |
| M P C Limited | Real estate | 1983 |
| M P Miles Limited | Professional & scientific | 2025 |
| M Plimmer Construction Ltd | Construction | 2024 |
| M R B Tiling Limited | Construction | 2014 |
| M Sarai Transport Limited | Transport & logistics | 2025 |
| M Zone Traders Ltd | Wholesale & retail | 2023 |
| M&A Venues Limited | Hospitality | 2015 |
| M&B Accounting and Bookkeeping Ltd | Professional & scientific | 2026 |
| M&C Energy Group Limited | Information & communication | 1981 |
| M&D Total Ltd | Health & social care | 2019 |
| M&J Management Limited | Administrative & support | 2025 |
| M&K Property Lettings Ltd | Real estate | 2023 |
| M&P Investments & Developments Limited | Real estate | 2020 |
| M&S Electrical Services (West Midlands) Ltd | Construction | 2026 |
| M&S Mahal Limited | Real estate | 2023 |
| M&Y Tyres Ltd | Wholesale & retail | 2024 |
| M.B.S. UK Services Limited | Construction | 2019 |
| M.Clarke Joinery Limited | Construction | 2011 |
| M.E. Bishop Carpentry Ltd | Construction | 2002 |
| M.E. Furniss & Sons (Farms) | Agriculture & fishing | 1969 |
| M.M Facilities Services Ltd | Administrative & support | 2025 |
| M.M.V. Investments Ltd | Construction | 2023 |
| M12-OFFROAD Limited | Wholesale & retail | 2014 |
| M2 Custom Design Ltd | Wholesale & retail | 2011 |
| M54 Land & Minerals Management Ltd | Mining & quarrying | 2018 |
| M54 Management Ltd | Extraterritorial | 2010 |
| M54 Space Centre Ltd | Professional & scientific | 2013 |
| M79 Limited | Financial services | 2019 |
| MA Golden Ltd | Health & social care | 2012 |
| MA Locum Doctor Ltd | Health & social care | 2022 |
| MA Properties (Telford) Ltd | Real estate | 2026 |
| MAC European Freight Ltd | Transport & logistics | 2001 |
| MAC Service and Board Repair Ltd | Wholesale & retail | 2000 |
| Macet Ltd | Administrative & support | 2019 |
| Maciej Sniadecki Ltd | Financial services | 2024 |
| Mackenzie Jones IT Limited | Administrative & support | 2015 |
| Mackenzie Jones Supply Chain and Operations Limited | Administrative & support | 2015 |
| Mackintosh & Sons Limited | Professional & scientific | 2023 |