| MJT Aviation Limited | Manufacturing | 2013 |
| MK Supreme Clean Limited | Extraterritorial | 2020 |
| MK Window Cleaning Limited | Administrative & support | 2020 |
| MKJ Solutions Ltd | Manufacturing | 2016 |
| MMC Aesthetics Limited | Health & social care | 2023 |
| Mmkali Ltd | Other services | 2022 |
| MMR Haulage Limited | Transport & logistics | 2017 |
| MN Business Group Ltd | Education | 2024 |
| Mobile Scan Van UK Ltd | Manufacturing | 2025 |
| Mocerpower Limited | Wholesale & retail | 2020 |
| Modina Bazar Ltd | Wholesale & retail | 2022 |
| Monarch Gate Properties Ltd | Real estate | 2019 |
| Mondo's Etna Ltd | Administrative & support | 2017 |
| Moneric Ltd | Health & social care | 2021 |
| Mono Mortgage Advice Limited | Financial services | 2014 |
| Monster Services Limited | Other services | 2019 |
| Moore Electrical Services NW Ltd | Construction | 2026 |
| Moortown Montessori Nursery Limited | Health & social care | 2011 |
| Moravian Homes Ltd | Real estate | 2022 |
| Morgan Dodd Painting & Decorating Ltd | Construction | 2024 |
| Morrilly Trading Limited | Wholesale & retail | 2023 |
| Mortimer Property Management Limited | Real estate | 2017 |
| Mortimer, Mortimer & Mortimer Ltd | Real estate | 2016 |
| Morton Estate Ltd | Real estate | 2025 |
| Moss Lane Property Management Company Limited | Households | 2005 |
| Moss Web Development Ltd | Information & communication | 2025 |
| Mossley Private Hire Ltd | Transport & logistics | 2008 |
| Mosswork Consulting Limited | Professional & scientific | 2026 |
| Motolinkuk Ltd | Wholesale & retail | 2026 |
| Motor Parts (Newton) Ltd | Wholesale & retail | 1992 |
| Mottram Woods Timber Engineering Ltd | Wholesale & retail | 2025 |
| MPA Electrical Limited | Construction | 2008 |
| Mpbd Ventures Limited | Administrative & support | 2026 |
| MR Daily Market 1 Ltd | Wholesale & retail | 2025 |
| MR Daily Market Ltd | Wholesale & retail | 2024 |
| MR Group Limited | Administrative & support | 2024 |
| MR Laws & Immigration Legal Consultant Ltd | Professional & scientific | 2025 |
| MR. Probate (Holdings) Limited | Administrative & support | 2009 |
| MR. Probate Limited | Professional & scientific | 2009 |
| Mr.Analyst Ltd | Professional & scientific | 2026 |
| Mrahman Group Ltd | Professional & scientific | 2016 |
| MS Controls Limited | Other services | 2017 |
| MS25 Consultants Limited | Professional & scientific | 2025 |
| Msct Investments Limited | Other services | 2023 |
| MSF Easy Solutions Limited | Financial services | 2007 |
| Msjb Limited | Real estate | 2020 |
| MSK Enterprises Ltd | Real estate | 2010 |
| MSL Web Solutions Ltd | Information & communication | 2007 |
| MSS Mini Market Ltd | Wholesale & retail | 2025 |
| Mssp Ltd | Construction | 2018 |
| MSV Sevices Ltd | Transport & logistics | 2019 |
| Mufassa Motors Ltd | Wholesale & retail | 2025 |
| Multiscape Ltd | Administrative & support | 2021 |
| Munizak Healthcare Services Ltd | Health & social care | 2015 |
| Mutmal Grill Ltd | Hospitality | 2025 |
| MVH Holdings Ltd | Financial services | 2015 |
| MW Brands Limited | Wholesale & retail | 2025 |
| Mwbastus Ltd | Professional & scientific | 2017 |
| My Dessert & Co MCR Ltd | Hospitality | 2026 |
| My Horse & I Ltd | Wholesale & retail | 2026 |
| My Vision Properties Ltd. | Real estate | 2018 |
| Mystore (Hyde) Ltd | Wholesale & retail | 2019 |
| N & J Lettings (Manchester) Limited | Real estate | 2024 |
| N. Mahon Consultancy Ltd | Professional & scientific | 2021 |
| N.E.A.T. Limited | Construction | 1994 |
| Nano Liquitech Solutions Ltd | Transport & logistics | 2019 |
| NAO Talent Limited | Wholesale & retail | 2025 |
| Nationwide Appliances Ltd | Wholesale & retail | 2026 |
| Nationwide Thermal Engineering Limited | Manufacturing | 1991 |
| Native B2B Limited | Professional & scientific | 2021 |
| Natural Beauty Spa Limited | Other services | 2014 |
| Navigating Neurodivergence Ltd | Other services | 2025 |
| Navyasoftware Ltd | Information & communication | 2015 |
| NAZ Mpharm Ltd | Professional & scientific | 2019 |
| NC13 Industries Ltd | Administrative & support | 2024 |
| NDB Trading Limited | Wholesale & retail | 2020 |
| Near Cloughside Farm Ltd | Agriculture & fishing | 2026 |
| Neill Birch Engineering Solutions Limited | Administrative & support | 2013 |
| Nequinox Studios Ltd. | Information & communication | 2015 |
| Nerd IT Ltd | Information & communication | 2019 |
| Nesbitt Medico-Legal Ltd | Health & social care | 2024 |
| Nestwell AAA Limited | Real estate | 2025 |
| Neuropathway Support Limited | Information & communication | 2025 |
| Neutron Enterprises Limited | Professional & scientific | 2014 |
| New Born Electronic's Limited | Wholesale & retail | 2012 |
| New Hawler Ltd | Other services | 2025 |
| New Horizon Psychological Services Limited | Health & social care | 2021 |
| New Inn (Hollingworth) Limited | Hospitality | 2025 |
| New Levels Fitness Ltd | Arts & recreation | 2025 |
| New Wealth Land Limited | Real estate | 2021 |
| New Wealth Property Limited | Real estate | 2008 |
| Newage Retail Limited | Wholesale & retail | 2020 |
| Newmarc Seals Ltd | Wholesale & retail | 2017 |
| Newton Barber Hyde Ltd | Other services | 2025 |
| Newton Court (Hyde) Management Company Limited | Real estate | 2009 |
| Newton HCW Ltd | Other services | 2016 |
| Newton Rentals Ltd | Real estate | 2023 |
| Nickosgeorge Hair Design Limited | Other services | 2004 |
| Nigel Gibbon & Co Ltd | Professional & scientific | 2013 |
| Nima Clothing Ltd | Wholesale & retail | 2025 |