| MRE Drainage Limited | Extraterritorial | 2018 |
| MRH Fabrications Ltd | Manufacturing | 2016 |
| Mroberts Building and Roofing Ltd | Construction | 2025 |
| MS Aviation Consultants Ltd | Transport & logistics | 2023 |
| MS Holdings (UK) Limited | Professional & scientific | 2014 |
| Msfp Solutions Limited | Manufacturing | 1997 |
| MSK Analytics Limited | Information & communication | 2013 |
| MSL Construction Ltd | Professional & scientific | 2018 |
| Msmsj Property Ltd | Real estate | 2025 |
| MT Electrical Holdings Ltd | Real estate | 2025 |
| MT Macc Management Ltd | Professional & scientific | 2026 |
| MT Nail Studio Ltd | Other services | 2021 |
| MTC Home Study Limited | Wholesale & retail | 2018 |
| MTP Entertainment Ltd | Real estate | 2026 |
| MTP Investment Ltd | Financial services | 2024 |
| MTT Engineering Ltd | Manufacturing | 2023 |
| Mucker of Macclesfield 1 Limited | Hospitality | 2020 |
| Mucker of Macclesfield 2 Limited | Hospitality | 2020 |
| Muddy FOX Solutions Ltd | Information & communication | 2023 |
| Mudmixer UK Ltd | Wholesale & retail | 2026 |
| Mudskipper Limited | Construction | 2024 |
| Mukadam Legal Recruitment Limited | Administrative & support | 2016 |
| Mukudu Global Limited | Other services | 2023 |
| Mulaj Ltd | Transport & logistics | 2025 |
| Mulberry Bush Macc Ltd | Hospitality | 2025 |
| Multitool Products Ltd | Professional & scientific | 2015 |
| Musbury’S Fine Art Ltd | Wholesale & retail | 2019 |
| Music Poster Limited | Wholesale & retail | 2018 |
| Mustang Doors Limited | Construction | 2019 |
| Mustang Properties Ltd | Information & communication | 2019 |
| Mustardmacc Ltd | Hospitality | 2025 |
| MW Builders Ltd | Construction | 2012 |
| MW Digital Limited | Information & communication | 2024 |
| MW Engineering (UK) Ltd | Professional & scientific | 2005 |
| Mwef Ltd | Information & communication | 2024 |
| MX Unique Limited | Agriculture & fishing | 2026 |
| My Big FAT Design Co Limited | Information & communication | 2023 |
| My Club Partnership Ltd | Financial services | 2017 |
| My Energy Rating Limited | Administrative & support | 2018 |
| My Loci Ltd. | Administrative & support | 2016 |
| My Mortgage Gateway Limited | Financial services | 2018 |
| My Patches Ltd | Wholesale & retail | 2026 |
| My Pet Frog Ltd | Wholesale & retail | 2012 |
| My Rise Ltd | Arts & recreation | 2012 |
| Mycomar Limited | Manufacturing | 2025 |
| Mygardenguru Limited | Other services | 2022 |
| Mylevel Pillows Limited | Wholesale & retail | 2025 |
| MZR Engineering Developments Ltd | Construction | 2025 |
| N & J Management Ltd | Real estate | 2021 |
| N and L Solutions Limited | Health & social care | 2019 |
| N B Cheshire Bathrooms Ltd | Construction | 2023 |
| N B Services 2006 Limited | Public administration | 2006 |
| N Carter & Company Limited | Wholesale & retail | 2014 |
| N J Hairdressing Ltd | Other services | 2022 |
| N Kennington Limited | Professional & scientific | 2025 |
| N T C Building Limited | Construction | 2008 |
| N Z Landscapes Ltd. | Agriculture & fishing | 2012 |
| N.A.P.S.A.C.- Nether Alderley Pre-School and All-Round Care | Education | 2007 |
| N.S.Burrows QS Limited | Professional & scientific | 2011 |
| NA Lews Castle Limited | Hospitality | 2011 |
| Naan Nexus Ltd | Hospitality | 2026 |
| Naees Limited | Professional & scientific | 2023 |
| Nainika Ltd | Health & social care | 2025 |
| Naitiv Limited | Professional & scientific | 2024 |
| Name Metrics Limited | Information & communication | 2015 |
| NAN Fang Ltd | Professional & scientific | 2022 |
| Nano Energy Technologies Ltd | Administrative & support | 2013 |
| Naomi Victoria Ltd | Wholesale & retail | 2021 |
| Narz Ltd | Wholesale & retail | 2021 |
| Nasm Properties Limited | Real estate | 2021 |
| National Association of Examinations Officers | Administrative & support | 2020 |
| National Direct Mail Limited | Extraterritorial | 2021 |
| National Packaging Limited | Administrative & support | 2016 |
| Nationwide Energy Solutions Limited | Construction | 2020 |
| Nationwide Leasing Limited | Extraterritorial | 2001 |
| Nationwide Motorbikes Ltd | Wholesale & retail | 2024 |
| Native Africa Unlimited Ltd | Arts & recreation | 2023 |
| Natracine UK Limited | Professional & scientific | 2006 |
| Natural Assets Investments Limited | Hospitality | 2011 |
| Natural Land 3 Limited | Real estate | 2009 |
| Natural Land 3 Management Limited | Administrative & support | 2012 |
| Natural Outfitters Limited | Hospitality | 2011 |
| Naturally Luxurious Limited | Information & communication | 1984 |
| Nauticas Technology Ltd | Professional & scientific | 2025 |
| Navigate NDC Limited | Professional & scientific | 2005 |
| Nayla Moss Healthcare Ltd | Health & social care | 2024 |
| NB Coaching Limited | Administrative & support | 2014 |
| NC Newss Ltd | Wholesale & retail | 2017 |
| Nccpo Ltd | Construction | 2025 |
| Ncda Limited | Real estate | 2015 |
| NCI Cheshire Limited | Financial services | 2017 |
| NCP Lighting Ltd | Administrative & support | 2025 |
| NDI Momentum Limited | Extraterritorial | 1973 |
| Nebu Leisure Ltd | Manufacturing | 2020 |
| Nebular Cloud Ltd | Information & communication | 2016 |
| Nebulasoft Limited | Information & communication | 2013 |
| Needham Property Developments Ltd | Construction | 2016 |
| Needle and Thread Ltd | Wholesale & retail | 2018 |
| Neenok Limited | Professional & scientific | 2010 |
| Neighbourly Music Limited | Administrative & support | 2017 |