| Moccia Property Investments Limited | Real estate | 2024 |
| Mock Tudor Board Ltd | Construction | 2026 |
| Mockingbird Productions Ltd | Information & communication | 2013 |
| Modality (BV) Property Limited | Real estate | 2015 |
| Modality (SMC) Property Limited | Real estate | 2015 |
| Modality LLP | | 2018 |
| Modality Medical Services Limited | Health & social care | 2011 |
| Modality Medical Spa Limited | Extraterritorial | 2013 |
| Modality Partnership Limited | Health & social care | 2015 |
| Modality Property Investments LLP | | 2021 |
| Modality Services Limited | Health & social care | 2015 |
| Modality Shared Services Limited | Extraterritorial | 2013 |
| Modaso Healthcare Solutions Ltd | Health & social care | 2024 |
| Modern and Classic Upholstery Limited | Other services | 2022 |
| Modern Edge Recruitment (Wolverhampton) Ltd | Administrative & support | 2023 |
| Modern Girls Limited | | 1987 |
| Modern Luxe Construction Ltd | Construction | 2023 |
| Modern Waste Technologies Ltd. | Manufacturing | 2025 |
| Modev Developments Limited | Construction | 2017 |
| Modia Boutique Ltd | Wholesale & retail | 2025 |
| Modomedical Solution Limited | Health & social care | 2025 |
| Modunlock Ltd | Information & communication | 2022 |
| Modupe Ventures Ltd | Wholesale & retail | 2026 |
| Modus Leisure UK Limited | Hospitality | 2024 |
| Modus Oak Frames Ltd | Construction | 2023 |
| Modus Surveying Limited | Professional & scientific | 2012 |
| Moedim Construction Ltd | Construction | 2026 |
| Mofik Enterprise Limited | Construction | 2015 |
| Mogespra Ltd | Financial services | 2025 |
| Moha Infotech Ltd | Information & communication | 2024 |
| Mohammed Khoshnaw Ltd | Wholesale & retail | 2026 |
| Mohammed MIA Ltd | Manufacturing | 2025 |
| Mohsin Hassan Ltd | Information & communication | 2025 |
| Mohsin Junaid Ltd | Wholesale & retail | 2026 |
| Moja Consulting Limited | Administrative & support | 2021 |
| Moje Solutions Ltd | Manufacturing | 2021 |
| Mojo (Midlands) Limited | Administrative & support | 2023 |
| Mojo Central Ltd | Manufacturing | 2022 |
| Moladebadmus Medical Services Limited | Health & social care | 2015 |
| Moldoveanu Ltd | Transport & logistics | 2024 |
| Molly Love Ltd | Health & social care | 2025 |
| Molly's Munchies Limited | Extraterritorial | 2022 |
| Molony ENT Otolaryngology Ltd | Health & social care | 2021 |
| Momentum Shropshire Limited | Financial services | 2017 |
| Momie's Transport Direct Ltd | Administrative & support | 2018 |
| Mommies Convenience Store Ltd | Wholesale & retail | 2024 |
| Momo Land Foods Limited | Hospitality | 2021 |
| Momoholic Limited | Wholesale & retail | 2025 |
| Monaky Limited | Real estate | 2016 |
| Monarch Beds & Mattresses Limited | Manufacturing | 2024 |
| Monarch Tiles Ltd | Wholesale & retail | 2025 |
| Monarch Vehicle Sales Limited | Wholesale & retail | 2019 |
| Monarchi Birmingham Ltd | Real estate | 2024 |
| Monarchi Developers Limited | Professional & scientific | 2013 |
| Monarchi Group Limited | Financial services | 2013 |
| Monarchi Holdings Limited | Financial services | 2026 |
| Monco Ltd | Professional & scientific | 2021 |
| Mondhaer Today Limited | Transport & logistics | 2011 |
| Money Matters Club Ltd | Education | 2023 |
| Money Tree Financial Planning Ltd | Financial services | 2013 |
| Money Wise Limited | Wholesale & retail | 2025 |
| Monifest (UN) Limited | Real estate | 2022 |
| Monmore Autos Ltd | Wholesale & retail | 2025 |
| Monochrome Global Ltd | Other services | 2023 |
| Monoposto Racing Club Limited | Other services | 2004 |
| Monsieur Executive Ltd | Wholesale & retail | 2014 |
| Montana Investments and Holdings Ltd | Information & communication | 2025 |
| Montriond Group Limited | Real estate | 2026 |
| Monty Joshi Limited | Hospitality | 2018 |
| Monty Retail Stores Limited | Wholesale & retail | 2023 |
| Moobile Limited | Information & communication | 2025 |
| Moog Wolverhampton Limited | Manufacturing | 2009 |
| Moolah Group Ltd | Other services | 2018 |
| Moonberry Lounge Limited | Hospitality | 2023 |
| Moonchild Spiritual Emporium Limited | Manufacturing | 2015 |
| Moonlit Market Ltd | Wholesale & retail | 2025 |
| Moore's Childcare Services Limited | Health & social care | 2019 |
| Moorfield Chase Limited | Households | 1996 |
| Moorfield Commercials Ltd | Administrative & support | 2021 |
| Moorfield Construction Services Ltd | Administrative & support | 2022 |
| Moorfield Recruitment Ltd | Administrative & support | 2024 |
| Moorfield Site Solutions Ltd | Administrative & support | 2021 |
| Moorwell Homes Ltd | Construction | 2020 |
| More Properties Ltd | Real estate | 2025 |
| Moreblessing Lifetime Limited | Health & social care | 2022 |
| Morelands Motorcycles Limited | Wholesale & retail | 2021 |
| Morello Construction Group Limited | Construction | 2024 |
| Morfe Valley Environmental Ltd | Professional & scientific | 2020 |
| Morfe Valley Farm Service Company Limited | Households | 2022 |
| Morgan Automatic Gates and Fabrications Limited | Manufacturing | 2024 |
| Morgan Payne & Knightly (Digbeth) Limited | Real estate | 2025 |
| Morgan Payne & Knightly Commercial Limited | Real estate | 2019 |
| Morgan Payne & Knightly Limited | Real estate | 2018 |
| Morgan Payne & Knightly Shropshire Limited | Real estate | 2019 |
| Morganix Ltd | Education | 2025 |
| Morii Photo Hub Ltd | Professional & scientific | 2023 |
| Morinda Transport Ltd | Transport & logistics | 2018 |
| Mornie Company Ltd | Health & social care | 2025 |
| Morning Fresh Worldwide Limited | Agriculture & fishing | 2012 |
| Morris Read and Co Solicitors Limited | Professional & scientific | 2019 |