| Mehar Logistics UK Ltd | Transport & logistics | 2022 |
| Mehar Roadways Transport Ltd | Transport & logistics | 2026 |
| Mehra's Holding Company Limited | Financial services | 2024 |
| Mehsen Korani Ltd | Other services | 2025 |
| Mein Cleaning Services Ltd | Water & waste | 2025 |
| MEK Pets Leisure Ltd | Administrative & support | 2025 |
| Melz Beauty Bar Ltd | Other services | 2021 |
| Mencil Ltd | Manufacturing | 2025 |
| Meraki PMO Consultancy Ltd | Professional & scientific | 2023 |
| Mercury Supplies Limited | | 1993 |
| Meri the Beautician Ltd | Other services | 2025 |
| Meridian Estates (West Midlands) Ltd | Real estate | 2007 |
| Meridian Supported Living C.I.C. | Hospitality | 2023 |
| Mertru Group Ltd | Information & communication | 2026 |
| Metcare Supplies Ltd | Wholesale & retail | 2024 |
| MFZ Ltd | Wholesale & retail | 2025 |
| MH Markhor Ltd | Manufacturing | 2026 |
| MHB Enterprise Ltd | Wholesale & retail | 2026 |
| MHL Properties WM Ltd | Real estate | 2025 |
| MHR Traders UK Ltd | Wholesale & retail | 2021 |
| MI Glass Group Limited | Financial services | 2011 |
| MI Glass Topco Limited | Financial services | 2018 |
| Michaels News Ltd | Wholesale & retail | 2023 |
| Micro Properties Ltd | Real estate | 2023 |
| Micronox Technologies Ltd | Administrative & support | 2021 |
| Midas Developments & Holdings Ltd | Construction | 2018 |
| Middle East Cancer AID Ltd | Health & social care | 2024 |
| Middlemore Autos (MMV) Limited | Wholesale & retail | 2021 |
| Middlemore Coachworks Ltd | Wholesale & retail | 2021 |
| Midland Anodising Limited | Professional & scientific | 1956 |
| Midland Auto Services & Exports Ltd | Wholesale & retail | 2019 |
| Midland Capital Investments Ltd | Real estate | 2023 |
| Midland Construction WM Ltd | Wholesale & retail | 2016 |
| Midland Industrial Glass Limited | Extraterritorial | 2012 |
| Midland Location Services Limited | Administrative & support | 2026 |
| Midland Management Limited | Construction | 2015 |
| Midland Mechanics Limited | Wholesale & retail | 2023 |
| Midland Physicians Ltd. | Health & social care | 2021 |
| Midland Properties Holding Limited | Real estate | 2018 |
| Midland Shot Blasting Ltd | Manufacturing | 2020 |
| Midland Tyres and Exhausts Ltd | Wholesale & retail | 2012 |
| Midlands Auto Spares Ltd | Wholesale & retail | 2013 |
| Midlands Embroidery Limited | Manufacturing | 2007 |
| Midlands Maintenance Ltd | Construction | 2025 |
| Midlands Motor Group Ltd | Wholesale & retail | 2019 |
| Midlands Oral Surgery Limited | Health & social care | 2019 |
| Midlands Oriental Ltd | Wholesale & retail | 2022 |
| Midlands Serve Ltd | Construction | 2019 |
| Midlands Truck & Van Limited | Wholesale & retail | 2011 |
| Midlands VEG Ltd | Wholesale & retail | 2021 |
| Midlands Vehicles Limited | Wholesale & retail | 2024 |
| Midlands Ventures Ltd | Wholesale & retail | 2025 |
| Midlands VENTURES-2 Ltd | Wholesale & retail | 2026 |
| Midlandsone Ltd | Financial services | 2024 |
| Midsomer Pizza Ltd | Hospitality | 2024 |
| Migrama Plastics Limited | Water & waste | 2011 |
| Mild Pizza Ltd | Hospitality | 2019 |
| Miles Importation Ltd | Wholesale & retail | 2025 |
| Millennial Recruitment Solutions Limited | Administrative & support | 2020 |
| Milmed Limited | Health & social care | 2020 |
| Milton Consultancy Solutions Ltd | Information & communication | 2020 |
| Milton IT Systems Ltd | Construction | 2020 |
| Minal Luxury Limited | Wholesale & retail | 2024 |
| Mindwave Unilink Ltd | Education | 2025 |
| Minerva Techne Limited | Information & communication | 2025 |
| Mini Stop Express Ltd | Wholesale & retail | 2025 |
| Ministerio Kadosh Limited | Other services | 2019 |
| Minora Ltd | Health & social care | 2026 |
| MIR Internation Supermarket Limited | Wholesale & retail | 2024 |
| Mira Holdings (NHM) Ltd | Real estate | 2026 |
| Mirang Properties Limited | Construction | 2018 |
| Mirel Limited | Real estate | 2025 |
| Mism Ltd | Arts & recreation | 2016 |
| Misoldo Ltd | Administrative & support | 2023 |
| Misurati Design Ltd | Professional & scientific | 2018 |
| Mitchell Catering Ltd | Hospitality | 2016 |
| Mitran 21 Ltd | Transport & logistics | 2021 |
| MIX and Match Retail Ltd | Wholesale & retail | 2015 |
| MJ & GK Limited | Wholesale & retail | 2026 |
| MJI Finance Ltd. | Financial services | 2015 |
| MK Home Services Ltd | Real estate | 2024 |
| MK Motor Repairs Ltd | Wholesale & retail | 2024 |
| MK North Ltd | Real estate | 2026 |
| MKJ Therapy Ltd | Health & social care | 2024 |
| MKM Trans Ltd | Wholesale & retail | 2018 |
| MKS Shines Limited | Wholesale & retail | 2024 |
| ML Drivers (Birmingham) Limited | Transport & logistics | 2014 |
| ML Intel Services Ltd | Construction | 2025 |
| Mlks Constructions Ltd | Construction | 2025 |
| MLS Property Estates Limited | Real estate | 2025 |
| MM Alloys Ltd | Wholesale & retail | 2026 |
| MM Amina Builders Ltd | Construction | 2020 |
| MM Catering WM Ltd | Hospitality | 2026 |
| MMM Birmingham Ltd | Wholesale & retail | 2025 |
| Mmmp Investments Ltd | Financial services | 2026 |
| MN Customs Ltd | Wholesale & retail | 2022 |
| MN Powder Coating Limited | Manufacturing | 2022 |
| Mndp Constructions Ltd | Manufacturing | 2025 |
| MNM Group Ltd | Wholesale & retail | 2024 |
| MNU Software Ltd | Construction | 2020 |