| Millington Management Limited | Professional & scientific | 2011 |
| Millington Surveyors Limited | Professional & scientific | 2018 |
| Mind, Body & Sole Ltd | Wholesale & retail | 2021 |
| Mindful Merchant Ltd | Wholesale & retail | 2024 |
| Mindfully Ltd | Information & communication | 2013 |
| Mini Beans Coffee Ltd | Hospitality | 2023 |
| Minis Shoe Shop Ltd | Wholesale & retail | 2022 |
| Mint Telesales and Marketing Limited | Administrative & support | 2018 |
| Mirror Indicate Limited | Manufacturing | 2016 |
| Mister Barber Congleton Limited | Other services | 2020 |
| Mitchell Harper Properties Limited | Professional & scientific | 2015 |
| Mixed Signals Band Limited | Wholesale & retail | 2026 |
| MJR Strategies Limited | Financial services | 2026 |
| MKD Contracting Services Ltd | Wholesale & retail | 2026 |
| MM Sales Ltd | Wholesale & retail | 2026 |
| Mmiilux Ltd | Professional & scientific | 2023 |
| Mmtgs Limited | Professional & scientific | 2014 |
| MNM Aesthetics Ltd | Health & social care | 2018 |
| Mobi-Telecom Limited | Wholesale & retail | 2024 |
| Mobilane (UK) Limited | Administrative & support | 2005 |
| Mobology Group Limited | Wholesale & retail | 2020 |
| Moj's Afro Caribbean Kitchen Limited | Hospitality | 2025 |
| Momentum Strategies Ltd | Professional & scientific | 2024 |
| Monkey-Wellbeing Ltd | Health & social care | 2023 |
| Montane Digital Ltd | Information & communication | 2025 |
| Monyash Limited | Professional & scientific | 2011 |
| Moorland Horseboxes Ltd | Manufacturing | 2020 |
| Moorland VEG Box Ltd | Wholesale & retail | 2020 |
| Moraira Management Limited | Professional & scientific | 2010 |
| Morfa Camp Limited | Other services | 2020 |
| Morris Mascot Limited | Arts & recreation | 2017 |
| Moseley Engineering Ltd | Professional & scientific | 2009 |
| Moss and Dean Properties Limited | Real estate | 2017 |
| Moss Close Road Management Company Limited | Other services | 2017 |
| Moss Property Investments Limited | Professional & scientific | 2018 |
| Moss Road Garden Centre Ltd | Agriculture & fishing | 2024 |
| Moss Road Rentals Ltd | Real estate | 2020 |
| Mossley Consulting Ltd | Professional & scientific | 2020 |
| Motiv Consultancy Ltd | Administrative & support | 2023 |
| Moto Retail Ltd | Wholesale & retail | 2023 |
| MOTORBIKES1980 Limited | Wholesale & retail | 2021 |
| Mountbatten Court Properties Limited | Real estate | 2012 |
| MOW View Developments Ltd | Real estate | 2023 |
| MPH Support Ltd. | Manufacturing | 2013 |
| MPM Waste Services Limited | Water & waste | 2025 |
| MPT (EBT) Limited | Other services | 2021 |
| MRG People Solutions Ltd | Administrative & support | 2021 |
| MRH Project Management Services Ltd | Professional & scientific | 2022 |
| MRL Leisure Services Ltd | Wholesale & retail | 2025 |
| Muhammad Saif Ullah Ltd | Wholesale & retail | 2025 |
| Mulhome Properties Ltd | Real estate | 2020 |
| Multi Access Hire Ltd | Construction | 2023 |
| Multiflex Coaching Limited | Education | 2019 |
| Mulway Ltd | Real estate | 2022 |
| Murphy & Tweats Joinery Limited | Construction | 2016 |
| Music Gofer Limited | Information & communication | 2016 |
| MVT Logistics UK Ltd | Transport & logistics | 2017 |
| MW Macc Ltd | Wholesale & retail | 2021 |
| MWB Electrical Services Limited | Construction | 2024 |
| My E-Hub Limited | Education | 2015 |
| My Serenity Outdoors Limited | Wholesale & retail | 2025 |
| My Virtual Agent Ltd | Professional & scientific | 2019 |
| Myk-J Security & Building Services Ltd | Wholesale & retail | 2018 |
| Myomend Ltd | Health & social care | 2022 |
| Mypin Global Ltd | Information & communication | 2025 |
| Mytern Limited | Professional & scientific | 2014 |
| N & J Bailey Limited | Transport & logistics | 2008 |
| N a B Metals Limited | Water & waste | 2026 |
| N Adams Transport Ltd | Transport & logistics | 2023 |
| N B Decor Limited | Construction | 2012 |
| N R G Efficiency Limited | Transport & logistics | 2007 |
| N.E.D.(Services) Limited | Real estate | 1984 |
| Nadins Lime and Stone Limited | Wholesale & retail | 2014 |
| Nagret Limited | Professional & scientific | 2012 |
| Nairy Limited | Professional & scientific | 2014 |
| Nanoshel (UK) Limited | Wholesale & retail | 2017 |
| Nantwich Furniture Company Limited | Construction | 2019 |
| National Car Keys Ltd | Other services | 2024 |
| Nationwide Vehicle Leasing Ltd | Administrative & support | 2017 |
| Natures Power Tech Ltd | Professional & scientific | 2022 |
| Naturexport Logistic Limited | Hospitality | 2012 |
| Navboys Limited | Wholesale & retail | 2013 |
| NB Cleaning Services Limited | Administrative & support | 2020 |
| NB Executive Solutions Limited | Professional & scientific | 2026 |
| NB Landscapes Ltd | Administrative & support | 2026 |
| NBT Holdings Limited | Real estate | 2025 |
| Nccf Ltd | Administrative & support | 2025 |
| Neddlingtan Limited | Professional & scientific | 2012 |
| Needhams Electrical Ltd | Construction | 2025 |
| Neerdog Limited | Wholesale & retail | 2024 |
| Neil Briscoe Limited | Health & social care | 2016 |
| Neil Morgan Electrical Ltd | Construction | 2023 |
| Neolinear Ltd | Wholesale & retail | 2018 |
| Neon Sportwear Limited | Wholesale & retail | 2025 |
| Network Partners Ltd | Information & communication | 2025 |
| Networkshield CIC | Information & communication | 2025 |
| Networkshield Solutions Ltd | Information & communication | 2025 |
| Neuropsychiatry Expert Limited | Health & social care | 2021 |
| Nevwil Associates Limited | Arts & recreation | 2004 |
| New Mill North Limited | Professional & scientific | 2022 |