| Little Bear's 3 Limited | Health & social care | 2012 |
| Little Bear's Daycare Holdco 2 Limited | Financial services | 2024 |
| Little Bear's Nursery School Limited | Education | 2004 |
| Little Bears 2 Limited | Education | 2011 |
| Little Italy Burntwood Ltd | Hospitality | 2024 |
| Little Learners Pre-School (UK) Ltd | Health & social care | 2009 |
| Lively Energy Flow Ltd | Wholesale & retail | 2025 |
| LJB Chiropractic Ltd | Health & social care | 2015 |
| LJF Plastering Limited | Construction | 2013 |
| LJS Collective Limited | Wholesale & retail | 2026 |
| LM Telford Limited | Hospitality | 2021 |
| Locked OUT Luke Ltd | Manufacturing | 2025 |
| Locksmith Frith Ltd | Financial services | 2019 |
| Logic Sports Injury Rehab Ltd | Health & social care | 2025 |
| Logistics & Freight Solutions Ltd | Transport & logistics | 2023 |
| Longship Importers Limited | Wholesale & retail | 2013 |
| Longstaff Construction Ltd | Construction | 2020 |
| Loss Adjusting Services Limited | Financial services | 2020 |
| Lovatty Limited | Transport & logistics | 2018 |
| Loveable Bows Limited | Arts & recreation | 2022 |
| Lovett & Co Estate Agents Ltd | Real estate | 2010 |
| LP Sports Coaching Limited | Education | 2022 |
| LRT Consultancy Limited | Professional & scientific | 2023 |
| LSR Performance Ltd | Wholesale & retail | 2022 |
| Lubricant Expo Limited | Wholesale & retail | 2025 |
| Luhrfilter Limited | Manufacturing | 1974 |
| Lyndale Stairs Limited | Manufacturing | 2015 |
| M & S Building Ltd | Construction | 2019 |
| M E Energy Ltd | Professional & scientific | 2011 |
| M Grainger's Landscaping Limited | Administrative & support | 2024 |
| M J Bailes Services Ltd | Other services | 2017 |
| M K Down Limited | Administrative & support | 2019 |
| M&B Express Haulage Ltd | Transport & logistics | 2025 |
| M&M Electrical Contractors (Mids) Ltd | Manufacturing | 2017 |
| M.A. Ponsonby Limited | Transport & logistics | 2002 |
| M.A.W. Plumbing & Heating Limited | Construction | 2008 |
| M.J. Plumbing Limited | Construction | 2005 |
| Mace Montessori Schools Limited | Education | 1999 |
| Magnetique Limited | Wholesale & retail | 2019 |
| Maier U.K. Limited | Manufacturing | 1999 |
| Maison Builders D Ltd | Construction | 2021 |
| Majalan Learning & Consultancy Limited | Education | 2021 |
| Major Curry Affair Burntwood Ltd | Hospitality | 2021 |
| Major Minors Limited | Education | 2000 |
| MAL Electrical Ltd | Construction | 2021 |
| MAN Fabrications Ltd | Manufacturing | 2015 |
| Marine 13 Ltd. | Wholesale & retail | 2015 |
| Marine-Trim Ltd | Manufacturing | 2018 |
| Mark Fisher Engineering Limited | Professional & scientific | 2017 |
| Mark Price & Co Limited | Real estate | 1998 |
| Marston Maintenance Ltd | Administrative & support | 2020 |
| Marston's BW Ltd | Construction | 2024 |
| MAS Accounts Ltd | Professional & scientific | 2024 |
| MAS Associates Limited | Professional & scientific | 2004 |
| Mascot Hair Design Limited | Other services | 2000 |
| Massive House Records Limited | Information & communication | 2010 |
| Maxim Systems Limited | Construction | 2005 |
| Mazzon Leisure Limited | Hospitality | 2015 |
| MBE Civils Ltd | Information & communication | 2021 |
| MDR Accountancy Services Limited | Professional & scientific | 2010 |
| MDR Accountancy Solutions Ltd | Professional & scientific | 2022 |
| Meadow Construction Ltd | Construction | 2024 |
| Mechanical Contractors (Ashfield) Ltd | Construction | 2015 |
| Mega Fortris (UK) Limited | Manufacturing | 1997 |
| Meliorafm Ltd | Other services | 2022 |
| Meliorafm Properties Ltd | Real estate | 2025 |
| Melvor Catering Ltd | Manufacturing | 2025 |
| Mente Clothing Ltd | Wholesale & retail | 2023 |
| Menvtime Ltd | Other services | 2021 |
| Mercia Estimating Services Ltd | Professional & scientific | 2024 |
| Mercian Group Enterprises Ltd | Financial services | 2013 |
| Mercian Labels Limited | Manufacturing | 1969 |
| Metromiles Logistics Limited | Transport & logistics | 2025 |
| MH (Midlands) Limited | Construction | 2006 |
| MH Automation Ltd | Manufacturing | 2026 |
| MH Roofing & Cladding Limited | Manufacturing | 2010 |
| Middlebrook Property Maintenance Limited | Construction | 2017 |
| Middleton & Wood Ltd | Other services | 2020 |
| Midex Ltd | Construction | 2026 |
| Midland Contract Distribution Limited | Real estate | 1988 |
| Midland Industrial Services Limited | Wholesale & retail | 2026 |
| Midland Minis Limited | Wholesale & retail | 2025 |
| Midland Plumbing Supplies (Burntwood) Limited | Wholesale & retail | 2002 |
| Midlands Collectables Limited | Wholesale & retail | 2023 |
| Midlands Events (Bury) Ltd | Real estate | 2026 |
| Midlands Events (Rhyl) Ltd | Real estate | 2025 |
| Midlands Events (Wythenshawe) Ltd | Real estate | 2026 |
| Midlands Events Limited | Real estate | 2016 |
| Midlands Kitchens Direct Limited | Manufacturing | 2025 |
| Midlands Legionella Control Limited | Water & waste | 2014 |
| Mikefpub Ltd | Hospitality | 2025 |
| Mikey Tea’S Ltd | Hospitality | 2020 |
| Mikyaal Restaurant Ltd | Hospitality | 2018 |
| Mirabel's Lion Limited | Arts & recreation | 2019 |
| MJB Financial Consulting Limited | Financial services | 2025 |
| MJG Transport Services Limited | Transport & logistics | 2018 |
| MKB Ltd | Construction | 2026 |
| MLE Pest Control Ltd | Administrative & support | 2025 |
| MLT Consultants Limited | Professional & scientific | 2021 |
| Mnhs Property Investments Ltd | Real estate | 2020 |