| Luna Developments NW Ltd | Financial services | 2017 |
| Lunerae Ltd | Manufacturing | 2026 |
| Lupton Marble & Granite Specialists Limited | Manufacturing | 2006 |
| LWG Sports Ltd | Education | 2026 |
| Lynch Design Services Ltd | Professional & scientific | 2006 |
| LYNDAM22 Ltd | Extraterritorial | 2023 |
| Lynsey Austen School Improvement Ltd | Education | 2020 |
| M & D Perrin Limited | Construction | 2024 |
| M Wilcock Farriers Ltd | Manufacturing | 2014 |
| M. & W. Properties Limited | Real estate | 1985 |
| M.T. Davies Plumbing & Heating Services Limited | Construction | 2003 |
| M29 Investments Limited | Real estate | 2021 |
| Maccha Consultancy Ltd | Professional & scientific | 2018 |
| Mackey Property Holdings Ltd | Real estate | 2022 |
| MAD About Beauty Limited | Other services | 2011 |
| Made by Clare Ltd | Manufacturing | 2022 |
| Made by Design Limited | Manufacturing | 2004 |
| Made by Forge Ltd | Information & communication | 2019 |
| Magic Surface Repairs Ltd | Construction | 2017 |
| Magnet (Finance) Limited | Financial services | 1977 |
| Maknate Ltd | Financial services | 2026 |
| Mama BE Fit Limited | Arts & recreation | 2025 |
| Mama's BOY Soap Kitchen Ltd | Wholesale & retail | 2025 |
| Management Group Investments Ltd | Financial services | 2026 |
| Manchester Kpop Dance Ltd | Wholesale & retail | 2026 |
| Mangmee Thai Ltd | Hospitality | 2025 |
| Mannion Surveying and Estimating Services Limited | Professional & scientific | 2016 |
| Maple Close (Padiham) Management Company Ltd | Households | 2020 |
| Mapsar Limited | Professional & scientific | 2008 |
| Marine & Industrial Diesel Engineering Services Ltd | Manufacturing | 2015 |
| Mario Enterprises Ltd | Real estate | 2025 |
| Mark Biscomb Properties Ltd | Real estate | 2019 |
| Mark Hanson Plumbing & Heating Limited | Construction | 2017 |
| Mark Schofield Tennis Limited | Education | 2014 |
| Mark Whittaker DRY Lining Ltd | Construction | 2009 |
| Marlbrook Financial Services Ltd | Administrative & support | 2016 |
| Marlis Consultants Ltd | Administrative & support | 2016 |
| Marvic 2000 Precision Engineering Ltd | Manufacturing | 2021 |
| Mary Care Group Ltd | Information & communication | 2026 |
| Master Design Limited | Construction | 2019 |
| Matched Properties Ltd | Real estate | 2023 |
| Material Girl Limited | Wholesale & retail | 2010 |
| Maternal and Neonatal Medicolegal Experts Ltd | Information & communication | 2025 |
| Matt Baker Golf Limited | Other services | 2022 |
| Matt Ellam Product Design Limited | Professional & scientific | 2018 |
| Mattdav Limited | Hospitality | 2008 |
| Matthews - Moreau Limited | Real estate | 2016 |
| Mattress-Ticking.Co.Uk Limited | Extraterritorial | 2014 |
| Mattresstickingsteven-Hargreaves.Com Limited | Extraterritorial | 2014 |
| Mauretania 2 Limited | Real estate | 2020 |
| Mauretania Limited | Hospitality | 2018 |
| Mawokind Manuals Ltd | Administrative & support | 2015 |
| Maxmedia Communications Limited | Administrative & support | 2010 |
| Mayfield Plumbing & Heating Ltd | Construction | 2025 |
| Mays & D Limited | Health & social care | 2026 |
| MB Holden Ltd | Manufacturing | 2021 |
| MCB Food Consultants Limited | Wholesale & retail | 2025 |
| Mckenzietutor Ltd | Wholesale & retail | 2019 |
| Mcmg Property Limited | Real estate | 2023 |
| Mcnamara Education Limited | Education | 2012 |
| MD Plumbing Heating & GAS Ltd | Construction | 2026 |
| Meadow Head Lancashire Limited | Hospitality | 2021 |
| Meanley Shoot Limited | Arts & recreation | 2020 |
| Mebproducts Ltd | Wholesale & retail | 2026 |
| MED Offshore Services Ltd | Other services | 2023 |
| Medicine and Performance Association Ltd | Health & social care | 2013 |
| Medina Spares Ltd | Arts & recreation | 2017 |
| Mellor Plant UK Ltd | Wholesale & retail | 2012 |
| Meloy Properties (Clitheroe) Limited | Real estate | 2017 |
| Memorials Direct Limited | Wholesale & retail | 2003 |
| Mendorax Ltd | Professional & scientific | 2016 |
| Menswear @ Amelia's Ltd | Wholesale & retail | 2012 |
| Merchant Music Limited | Arts & recreation | 2017 |
| Merlin TCS Ltd | Extraterritorial | 2004 |
| Merrin Limited | Professional & scientific | 2015 |
| Metcalf Drive (Management Company) Ltd | Households | 2021 |
| Metcalf Drive Ltd | Construction | 2020 |
| Metcalf Family Holdings Limited | Financial services | 2025 |
| Metstok International Limited | Wholesale & retail | 2010 |
| Mewp Operator Hire Limited | Administrative & support | 2019 |
| MGB (Darwen) Limited | Construction | 2006 |
| MGD Creative Limited | Other services | 2017 |
| MH Electrical (Clitheroe) Ltd | Extraterritorial | 2013 |
| Mhts Property Solutions Ltd | Real estate | 2024 |
| Micbabmac Ltd | Real estate | 2023 |
| Michael Hoyle & Co Limited | Wholesale & retail | 1999 |
| Michelle Castle Ltd | Hospitality | 2026 |
| Mickleworks IT Limited | Information & communication | 2014 |
| Micramed Limited | Professional & scientific | 2017 |
| Middle Wellgate Limited | Real estate | 1963 |
| Middlewood Property Limited | Real estate | 2013 |
| Midia Consulting Ltd | Professional & scientific | 2014 |
| Miishō Studio Ltd | Hospitality | 2025 |
| Miles FOX (Haulage) Limited | Transport & logistics | 1990 |
| Miles FOX (Holdings) Ltd | Professional & scientific | 2005 |
| Milestone Wines Limited | Wholesale & retail | 2014 |
| Millbrook Associates Limited | Construction | 2014 |
| Millbrook Design Limited | Professional & scientific | 2003 |
| Millfield Rosettes Limited | Wholesale & retail | 2004 |
| Milltek Interiors Limited | Construction | 2025 |