| Morserv Risk Management Ltd | Professional & scientific | 2026 |
| Mortarmix Properties Limited | Households | 2023 |
| Mortgage & Business Consultancy Ltd | Financial services | 2021 |
| Mortgage & Financial Solutions Ltd | Financial services | 2015 |
| Mortgage Broker Wolverhampton Ltd | Financial services | 2020 |
| Mosaic Counselling and Coaching Ltd | Health & social care | 2014 |
| Moseley Convenience Stores Limited | Wholesale & retail | 2020 |
| Moses Asbestos Solutions Ltd | Professional & scientific | 2019 |
| Mossa Logistics Limited | Transport & logistics | 2021 |
| Mostly Cloudy Ltd | Wholesale & retail | 2025 |
| Mot's Testing Ltd | Professional & scientific | 2020 |
| Mother India Punjab Ltd | Hospitality | 2016 |
| Motherland Daughter Ltd | Manufacturing | 2022 |
| Mothers Diamonds Ltd | Wholesale & retail | 2025 |
| Motion and Sport Ltd | Education | 2026 |
| Motion Trade Wolverhampton Ltd | Wholesale & retail | 2022 |
| Motionflow Limited | Information & communication | 2025 |
| Motivactionuk CIC | Education | 2024 |
| Motivational Mountains Ltd | Hospitality | 2022 |
| Moto Accident Claims Limited | Financial services | 2008 |
| Motor Advertising Limited | Professional & scientific | 2024 |
| Motorcycle Parts & Accessories UK Ltd | Wholesale & retail | 2014 |
| Motorhome Pads Ltd | Wholesale & retail | 2026 |
| Moudavishealthcare Ltd | Health & social care | 2022 |
| Moulton Dore Ltd | Health & social care | 2024 |
| Mount Gurkha Bistro Ltd | Hospitality | 2024 |
| Mount Square Capital Limited | Professional & scientific | 2019 |
| Mountain Design Limited | Professional & scientific | 2007 |
| Mountain Faith Ltd | Real estate | 2021 |
| Mountain Peak Services Limited | Real estate | 2025 |
| Mountstrips Ltd | Information & communication | 2026 |
| Mountv EPC Ltd | Professional & scientific | 2026 |
| Move & Nourish Limited | Health & social care | 2014 |
| Move Mobility Limited | Wholesale & retail | 2016 |
| Move Reports UK Ltd | Information & communication | 2002 |
| Moveright Estate Agents Limited | Real estate | 2014 |
| Moving Water Media Limited | Information & communication | 2013 |
| Moviq Ltd | Wholesale & retail | 2025 |
| Movixa Limited | Transport & logistics | 2025 |
| Movveit Limited | Information & communication | 2022 |
| Moxo Ventures Ltd | Wholesale & retail | 2026 |
| Moyo&Co Ltd | Professional & scientific | 2025 |
| Mozby Limited | Real estate | 2023 |
| MP Childrens Care Home Ltd | Health & social care | 2025 |
| MP Comps Ltd | Wholesale & retail | 2022 |
| MP18 Ltd | Manufacturing | 2022 |
| MP3D Printing Ltd | Manufacturing | 2020 |
| MPC Windows Limited | Construction | 2003 |
| MPD Drywall Limited | Construction | 2009 |
| MPF Developments Limited | Real estate | 2024 |
| Mpower Clinic Ltd | Wholesale & retail | 2025 |
| MPS Logistics Limited | Financial services | 2018 |
| MPT Limited | Transport & logistics | 2015 |
| MR & MRS Detailing Ltd | Administrative & support | 2023 |
| MR Bagga Limited | Transport & logistics | 2024 |
| MR Boiler GAS and Heating Ltd | Construction | 2018 |
| MR Booths Ltd | Professional & scientific | 2022 |
| MR Chef 168 Limited | Hospitality | 2024 |
| MR Chief Ltd | Wholesale & retail | 2021 |
| MR Cooker Ltd | Construction | 2021 |
| MR Crete Ltd | Construction | 2019 |
| MR Digitizing Ltd | Information & communication | 2023 |
| MR Faraz Ltd | Wholesale & retail | 2025 |
| MR Finansingh Ltd | Professional & scientific | 2019 |
| MR Gurnam Singh Ltd | Extraterritorial | 2019 |
| MR JAX Limited | Transport & logistics | 2024 |
| MR Midlands Interiors Ltd | Construction | 2023 |
| MR Mo's Dudley Limited | Hospitality | 2026 |
| MR SSP Ltd | Transport & logistics | 2018 |
| MR Trusty Limited | Administrative & support | 2009 |
| Mr&Aa Ltd | Transport & logistics | 2026 |
| MR. Boiler Limited | Manufacturing | 2013 |
| MR. CAM Ltd | Arts & recreation | 2014 |
| MRB Legacy Ltd | Transport & logistics | 2024 |
| MRG Construction 1 Ltd | Construction | 2025 |
| MRG Wolverhampton Ltd | Real estate | 2016 |
| MRI Limited | Real estate | 2012 |
| MRM Empire Ltd | Information & communication | 2026 |
| MRM Engineering Services Limited | Wholesale & retail | 2010 |
| Mrpatels.Com Ltd | Manufacturing | 2003 |
| Mrps Transport Ltd | Transport & logistics | 2022 |
| MRS T & Daughters Sandwich Bar Limited | Hospitality | 2020 |
| Mrzone Ltd | Construction | 2025 |
| MS Bains TM Ltd | Construction | 2024 |
| MS Bill Protectors Ltd | Professional & scientific | 2023 |
| MS Consultancy International Ltd | Professional & scientific | 2021 |
| MS Dhillon Construction Limited | Construction | 2023 |
| MS Engineering Services Limited | Professional & scientific | 2022 |
| MS Kang Ltd | Transport & logistics | 2025 |
| MS PVT Limited | Real estate | 2021 |
| MS UK Builders Ltd | Construction | 2024 |
| MSA Leisure Ltd | Hospitality | 2018 |
| MSB18 Ltd | Administrative & support | 2023 |
| Msblooks Ltd | Wholesale & retail | 2025 |
| MSD Builders Ltd | Construction | 2018 |
| MSD Real Estates Ltd | Real estate | 2023 |
| MSE Tech Ltd | Wholesale & retail | 2024 |
| MSG Optical Limited | Wholesale & retail | 2025 |
| Msgrg Property Ltd | Real estate | 2026 |
| MSH Sheeting & Cladding Ltd | Construction | 2018 |