| M C Electrical Installations Ltd | Professional & scientific | 2012 |
| M Forster Properties Limited | Real estate | 2003 |
| M Womack Property Ltd | Real estate | 2017 |
| M1 Nails Ltd | Other services | 2025 |
| M7 Projects Limited | Construction | 2018 |
| Mabel of Marbury Limited | Hospitality | 2021 |
| Manchester Metal Craft Limited | Manufacturing | 2014 |
| Manor Gardens (Lymm) Management Company Limited | Real estate | 2025 |
| Mansion House Group (Sandbach) Limited | Construction | 2020 |
| Mansion House Group Developments Limited | Real estate | 2019 |
| Mansion House Group Holdings Limited | Financial services | 2020 |
| Mansion House Group Investments Limited | Construction | 2017 |
| Mansion House Group Southern Limited | Real estate | 2020 |
| MAP Utility Ltd | Construction | 2019 |
| Maple Tree Healthcare Limited | Health & social care | 2025 |
| March Sports Limited | Professional & scientific | 2022 |
| Mariner Travel Limited | Administrative & support | 2003 |
| Mark Ransby Limited | Professional & scientific | 2010 |
| Marnshaw Limited | Real estate | 1992 |
| Marple House Group Limited | Construction | 2015 |
| Marshall Containment Ltd | Professional & scientific | 2021 |
| Maths Together Ltd | Education | 2018 |
| Mathstone Limited | Professional & scientific | 2018 |
| Maxwell Scott Ltd | Other services | 2019 |
| Mcardwell Ltd | Health & social care | 2019 |
| Mcdwell Ltd | Real estate | 2024 |
| Mcloone Property Limited | Real estate | 2019 |
| MCR Scaffolding Ltd | Construction | 2020 |
| Mcvey Data Consulting Limited | Information & communication | 2017 |
| MD Property Estates Limited | Real estate | 2018 |
| Meadows Children’S Nursery Ltd | Education | 2019 |
| Meadowview Fisheries DC Ltd | Agriculture & fishing | 2024 |
| Meateam Consultancy Ltd | Hospitality | 2015 |
| Medisted Ltd | Health & social care | 2021 |
| Medusa Aesthetics Cheshire Ltd | Other services | 2026 |
| Melrick Management Company Ltd | Professional & scientific | 2023 |
| Mental Fitness Matters Limited | Other services | 2024 |
| Mere House Day Nursery Limited | Education | 2015 |
| Merepark Gillibrands Limited | Real estate | 2014 |
| Merepark Partnership Limited | Construction | 2001 |
| Merepark Project Management Limited | Construction | 2009 |
| Merepark Washway Road (Sale) LLP | | 2007 |
| Mereside Farm Childrens Nursery Limited | Education | 2006 |
| MG Strategic Solutions Ltd | Professional & scientific | 2021 |
| MHG Commercial Investments LLP | | 2018 |
| MHG Investments LLP | | 2017 |
| MHG Residential Investments Ltd | Real estate | 2023 |
| Michael Crane Design Ltd. | Administrative & support | 1998 |
| Middleton Gymnastics Club C.I.C. | Arts & recreation | 2018 |
| Midford Road Nursery Limited | Health & social care | 2015 |
| Mini Mansions Ltd. | Real estate | 2016 |
| Mitss Ltd | Information & communication | 2018 |
| Mixtape Digital Limited | Information & communication | 2015 |
| MJ Easton Coaching & Consulting LLP | | 2023 |
| MLS Global Sourcing Limited | Professional & scientific | 2026 |
| Mobility Engineering (Cheshire) Limited | Manufacturing | 1974 |
| Model Decisions Limited | Information & communication | 2015 |
| Moorjan Limited | Transport & logistics | 2023 |
| Moose PM Ltd | Information & communication | 2015 |
| Morii Designs Ltd | Manufacturing | 2022 |
| Moulton Property Holdings Ltd | Real estate | 2025 |
| Mpfd Associates Ltd | Extraterritorial | 2013 |
| MPM Childcare Ltd. | Health & social care | 2009 |
| Mrmusictutor Limited | Wholesale & retail | 2018 |
| MULTI21DESIGN Ltd | Wholesale & retail | 2021 |
| Muma Consultancy Ltd | Other services | 2019 |
| Music and Play Therapy Services Ltd | Health & social care | 2010 |
| Music for Life | Education | 1998 |
| MVD Fleet Logistics Ltd | Transport & logistics | 2017 |
| My Time to Soar Ltd | Health & social care | 2025 |
| Mystripe Consulting Limited | Information & communication | 2011 |
| N & C Consultants Ltd | Financial services | 2018 |
| N & C Estates Limited | Real estate | 2014 |
| Nanak Naam Entertainment Limited | Arts & recreation | 2023 |
| Nanak Trading Ltd | Administrative & support | 2014 |
| Natl Limited | Real estate | 2016 |
| Neston Farm Nursery Limited | Health & social care | 2020 |
| New Living Ltd | Real estate | 2017 |
| Newfield Court Management Company Limited | Real estate | 1982 |
| Newlands Nursery School Limited | Education | 2001 |
| Nexo Business Solutions Ltd | Information & communication | 2024 |
| Nice Rice Ltd | Hospitality | 2025 |
| Nicole Williams Organisational Psychology Limited | Health & social care | 2021 |
| Nicolette Marsden Limited | Health & social care | 2016 |
| Nikeyichi Limited | Professional & scientific | 2020 |
| Ninebridges Hotels Limited | Hospitality | 1963 |
| NO Plane NO Gain Aviation Ltd | Manufacturing | 2025 |
| NO Planet B Limited | Professional & scientific | 2025 |
| Noahs ARK Childrens Day Nursery Ltd | Education | 2008 |
| Nodus Facility Services Limited | Administrative & support | 2012 |
| Nodus Solutions Limited | Professional & scientific | 2011 |
| Nomad Games Limited | Information & communication | 2011 |
| Nook Barn Nursery Limited | Health & social care | 2008 |
| Norbreck Happy Days Limited | Other services | 2006 |
| North From BOW Ltd | Professional & scientific | 2012 |
| North West Communications Ltd | Construction | 2013 |
| North West Specialist Physiotherapy Services Ltd | Professional & scientific | 2017 |
| Northern Star Electrical Limited | Professional & scientific | 2003 |
| Northern Timber Frame Ltd | Manufacturing | 2025 |
| Northwest Motormovers Limited | Transport & logistics | 2013 |