| Local Insulation Supplies Ltd | Wholesale & retail | 2022 |
| Local Roofing Supplies Ltd | Wholesale & retail | 2020 |
| Localhost Meet Ltd | Administrative & support | 2025 |
| Lockaid 24/7 Ltd | Administrative & support | 2010 |
| Locks Academy Ltd | Education | 2024 |
| Locum.Vet Ltd | Professional & scientific | 2021 |
| Lodestar Accounting Limited | Professional & scientific | 2016 |
| Lodge Room Catering Ltd | Hospitality | 2026 |
| LOG FX Ltd | Manufacturing | 2023 |
| Logiser Ltd | Transport & logistics | 2025 |
| Logistics Solutions Limited | Financial services | 2021 |
| Long Golf Ltd | Wholesale & retail | 2025 |
| Lordwell Catering Equipment Ltd | Wholesale & retail | 2021 |
| Lordwell Holdings Ltd | Financial services | 2021 |
| Lorem Properties Ltd | Real estate | 2024 |
| Lorna Writes Ltd | Administrative & support | 2019 |
| Lost-Wax Limited | Manufacturing | 2024 |
| Loubenita Ltd | Wholesale & retail | 2022 |
| Love Emvy Ltd | Wholesale & retail | 2022 |
| Love Story Wedding Photography Ltd | Professional & scientific | 2024 |
| Love Your Furbabies Ltd | Wholesale & retail | 2025 |
| Loveday Creations Ltd | Administrative & support | 2024 |
| Lovetts Homes Ltd | Real estate | 2017 |
| Lowe Consulting Education Limited | Professional & scientific | 2026 |
| Lowe Investments Limited | Financial services | 2013 |
| Lowe Property Lettings Limited | Real estate | 2021 |
| LRT Structural Steel Services Ltd | Construction | 2024 |
| LS Waste Services Ltd | Water & waste | 2025 |
| LTC Inspection Services Limited | Professional & scientific | 2017 |
| Lttc Limited | Information & communication | 2014 |
| Lucasomari Ltd | Transport & logistics | 2024 |
| Lucky Tails Alpaca Farm Limited | Arts & recreation | 2022 |
| Lucky Warwick Limited | Health & social care | 2013 |
| Lucky Warwick Properties Limited | Real estate | 2022 |
| Lucy Foster Aesthetics Limited | Other services | 2014 |
| Lucy Glyn Support Services Limited | Health & social care | 2011 |
| Lucy Riley Interiors Ltd | Construction | 2025 |
| Luevah Limited | Real estate | 2026 |
| Lujayn Education Ltd | Education | 2025 |
| Luka Transport Ltd | Transport & logistics | 2013 |
| Lukol Limited | Financial services | 2012 |
| Luksus Recruitment Limited | Administrative & support | 2025 |
| Lumaura Ltd | Information & communication | 2025 |
| Luminescence Automotive Ltd | Wholesale & retail | 2023 |
| Lunas Leisure Limited | Hospitality | 2025 |
| Lutze Limited | Manufacturing | 1993 |
| Luvia Olive Ltd | Wholesale & retail | 2025 |
| Luxe Love Lifestyle Limited | Education | 2019 |
| Luxe Smiles Ltd | Health & social care | 2024 |
| Luxury Regal Ltd | Wholesale & retail | 2020 |
| Lvaldezco Ltd | Wholesale & retail | 2022 |
| Lycett Fabrications Limited | Manufacturing | 1994 |
| Lycett Holdings Limited | Professional & scientific | 1999 |
| Lydia Emma-Lee Limited | Wholesale & retail | 2014 |
| Lynneth Holdings Limited | Financial services | 2020 |
| M & B Properties (Tamworth) Ltd | Real estate | 2009 |
| M & D Careplus Limited | Health & social care | 2017 |
| M & D Environmental Services Limited | Professional & scientific | 2015 |
| M & G Ground Services Limited | Construction | 2004 |
| M & J Evans Construction Limited | Construction | 2003 |
| M & J Evans Plant Limited | Administrative & support | 2012 |
| M & S Holdings 2017 Ltd | Administrative & support | 2013 |
| M & S Solutions Plus Limited | Wholesale & retail | 2010 |
| M & S Storage and Distribution Ltd | Transport & logistics | 2025 |
| M a Williams Decorators Limited | Construction | 2010 |
| M Cole Plumbing & Heating Ltd | Construction | 2026 |
| M H R Carpets Ltd | Wholesale & retail | 1999 |
| M Hall Limited | Professional & scientific | 2024 |
| M Heath Mechanical Services Ltd | Manufacturing | 2025 |
| M J a Carpentry Contractors Limited | Construction | 2007 |
| M Mason (Plumbing & GAS Services) Limited | Construction | 2010 |
| M Robinson Investments (Stone) Limited | Real estate | 2023 |
| M S T Trade Centre Limited | Wholesale & retail | 2014 |
| M Squared Property Developments Limited | Construction | 2020 |
| M X K Leather Goods Ltd | Wholesale & retail | 2005 |
| M Y Services (Midlands) Limited | Manufacturing | 2013 |
| M&C Logistics Limited | Transport & logistics | 2020 |
| M&C Superstores Limited | Wholesale & retail | 2025 |
| M&G Brickwork and Building Services Ltd | Construction | 2025 |
| M&J Electrical Contractors Limited | Other services | 2015 |
| M&J Evans Group Limited | Financial services | 2018 |
| M&J Utility Services Limited | Construction | 2025 |
| M&L Birch Properties Ltd | Real estate | 2021 |
| M&W Sale Ltd | Administrative & support | 2024 |
| M-Tech GT Limited | Administrative & support | 2011 |
| M-Tech Limited | Administrative & support | 2002 |
| M-Tech Lite Limited | Administrative & support | 2005 |
| M. L. Farming Limited | Administrative & support | 2003 |
| M. R. Golf Limited | Arts & recreation | 2009 |
| M.A.P Haulage Ltd | Extraterritorial | 2024 |
| M.A.S.K Fitness Ltd | Arts & recreation | 2023 |
| M.A.S.K FITNESS2 Ltd | Arts & recreation | 2025 |
| M.A.U Construction Ltd | Construction | 2002 |
| M.C.S. Data Holdings Limited | Real estate | 2013 |
| M.C.S. Data Networks Limited | Information & communication | 2004 |
| M.E.I.C Electrical Limited | Energy | 2010 |
| M.P.D. Engineering Limited | Manufacturing | 2001 |
| M2 Developments (Midlands) Ltd | Construction | 2025 |
| M4 Partners Limited | Administrative & support | 2025 |
| M89 Scaffolding Ltd | Construction | 2025 |