| Mg’S Cafe Limited | Hospitality | 2022 |
| MH Hand Car Wash Ltd | Administrative & support | 2025 |
| MH Repairs Ltd | Wholesale & retail | 2018 |
| MH Store Ltd | Wholesale & retail | 2026 |
| MH Wholesale Commodities Limited | Wholesale & retail | 2026 |
| Mhafs Ltd | Professional & scientific | 2026 |
| MHB Parts Ltd | Wholesale & retail | 2022 |
| Mhofu Capital Ltd | Professional & scientific | 2021 |
| Mhondoro Group Limited | Financial services | 2021 |
| MHS Construction Ltd | Construction | 2018 |
| Mhshah Ltd | Manufacturing | 2026 |
| MI Automotive Ltd | Manufacturing | 2025 |
| MI Hungry Ltd | Hospitality | 2026 |
| MI UK Property Ltd | Real estate | 2025 |
| MIA Financial Advice Ltd | Financial services | 2020 |
| Mian ABR Ltd | Wholesale & retail | 2026 |
| MIB Electrical Ltd | Construction | 2021 |
| Micamare Ltd | Transport & logistics | 2024 |
| Michael Allen Traffic Management Limited | Construction | 2017 |
| Michael Bachyk Limited | Wholesale & retail | 2004 |
| Michael Hallett TM Ltd | Construction | 2017 |
| Michael Mcentee Building Limited | Construction | 2017 |
| Michael Randhawa Ltd | Health & social care | 2021 |
| Michael Redshaw Holdings Limited | Professional & scientific | 1971 |
| Michael Smith Builders Limited | Manufacturing | 2016 |
| Michael Tromans & Co LLP | | 2010 |
| Michelle Lawley Limited | Other services | 2015 |
| Michla Catering Limited | Hospitality | 2025 |
| Mick Aldridge Transport Limited | Transport & logistics | 2002 |
| Mick Whitehouse Limited | Construction | 2014 |
| Mick Williams Limited | Arts & recreation | 2003 |
| Micolde Investments Limited | Wholesale & retail | 2024 |
| Micro Scoot UK Ltd | Manufacturing | 2021 |
| Micro Writer Ltd | Information & communication | 2025 |
| Micro-Business Maintenance Limited | Information & communication | 1995 |
| Microflow Ltd | Manufacturing | 2021 |
| Microtek Repair & Retail UK Ltd | Other services | 2020 |
| Mictech Ltd | Information & communication | 2018 |
| Midas Care Solutions Ltd | Health & social care | 2016 |
| Midas Care Supported Living Ltd | Health & social care | 2023 |
| Midas Commodities Ltd | Manufacturing | 2026 |
| Midas Homes Ventures Ltd | Real estate | 2020 |
| Midas Pro Ltd | Professional & scientific | 2025 |
| Middleton Asset Holdings Ltd | Real estate | 2024 |
| Middleton Automation Limited | Manufacturing | 2006 |
| Middleton Group Services Limited | Real estate | 2006 |
| Middleton Investment Holdings Ltd | Other services | 2024 |
| Midehgold Ltd | Wholesale & retail | 2025 |
| Midelyn Limited | Wholesale & retail | 2022 |
| Midford Building Services Limited | Construction | 1988 |
| Midi Properties Limited | Real estate | 2025 |
| Midland Autotest Limited | Wholesale & retail | 2013 |
| Midland Blacksmiths Limited | Manufacturing | 2025 |
| Midland Car Breakers Ltd | Water & waste | 2011 |
| Midland Care Support & Enablement Ltd | Health & social care | 2015 |
| Midland CCM and Outsourcing Ltd | Wholesale & retail | 2014 |
| Midland Commercial Enterprises Limited | Real estate | 2022 |
| Midland Consortium Investments Limited | Households | 2007 |
| Midland Construction Ltd | Construction | 2023 |
| Midland Dermatology Service Limited | Real estate | 2011 |
| Midland Distribution Ltd | Manufacturing | 2017 |
| Midland Electrics Limited | Manufacturing | 2015 |
| Midland Energy Brokers Ltd | Administrative & support | 2026 |
| Midland Energy Ltd | Construction | 2026 |
| Midland Fire & Flood Restoration Services Limited | Construction | 2007 |
| Midland Floor & Wall Covering Ltd | Construction | 2011 |
| Midland Flow Ltd | Manufacturing | 1993 |
| Midland Interiors Limited | Construction | 2018 |
| Midland Marketing Group Ltd | Professional & scientific | 2021 |
| Midland Motors Automotives Limited | Wholesale & retail | 2025 |
| Midland Music Academy | Education | 2002 |
| Midland Plastics & Plumbing Ltd | Wholesale & retail | 2012 |
| Midland Polishing & Plating Co Limited | Manufacturing | 1994 |
| Midland Property Holding Ltd | Real estate | 2025 |
| Midland Property Management Limited | Households | 1997 |
| Midland Remaps Limited | Wholesale & retail | 2015 |
| Midland Rental Properties Limited | Extraterritorial | 2002 |
| Midland Retail Operations Ltd | Real estate | 2021 |
| Midland Risk Solutions Ltd | Financial services | 2017 |
| Midland Safe Installations Limited | Wholesale & retail | 1981 |
| Midland Secure Couriers Limited | Transport & logistics | 2020 |
| Midland Steel Supplies Ltd | Manufacturing | 2021 |
| Midland Van Hire Limited | Wholesale & retail | 2010 |
| Midland Vehicle Services Ltd | Wholesale & retail | 2022 |
| Midland's Chiller Services Limited | Other services | 2013 |
| Midlands Adas Calibration Centre Ltd | Wholesale & retail | 2026 |
| Midlands Asset Protection Ltd | Administrative & support | 2019 |
| Midlands Business Partnership Ltd | Professional & scientific | 2015 |
| Midlands Car Centre Ltd | Wholesale & retail | 2025 |
| Midlands Civil Construction Limited | Construction | 2018 |
| Midlands Cosmetics Limited | Health & social care | 2011 |
| Midlands Electrical Maintenance Limited | Construction | 2025 |
| Midlands Estate Agents Limited | Real estate | 2025 |
| Midlands Event Crew Ltd | Arts & recreation | 2025 |
| Midlands Fibre Optic Splicing & Testing Ltd | Construction | 2021 |
| Midlands Glazing Ltd | Construction | 2024 |
| Midlands Health and Safety Consultancy Limited | Professional & scientific | 2018 |
| Midlands Healthcare Ltd | Health & social care | 2019 |
| Midlands Investment Agency Limited | Financial services | 2014 |
| Midlands LED Specialist Ltd | Professional & scientific | 2021 |