| Manc City Properties Ltd | Real estate | 2024 |
| Manc Prop Ltd | Real estate | 2020 |
| Manchester & Ashton Tax Shops Limited | Professional & scientific | 2015 |
| Manchester Education Limited | Education | 2024 |
| Manchester Eicr Limited | Construction | 2022 |
| Manchester Eicr Properties Limited | Real estate | 2025 |
| Manchester Energy Grants Ltd | Construction | 2021 |
| Manchester Executive Transfers Ltd | Transport & logistics | 2024 |
| Manchester GAS Safety Limited | Construction | 2026 |
| Manchester Metrology Limited | Professional & scientific | 2008 |
| Manchester Optical Ltd | Professional & scientific | 2003 |
| Manchester Properties Ltd | Real estate | 2020 |
| Manchester Rope Access Limited | Construction | 2012 |
| Manchester Spray Specialist Ltd | Construction | 2021 |
| Manchester Towers Ltd | Real estate | 2023 |
| Manchester ZX Trainers Limited | Wholesale & retail | 2014 |
| Manchester's Busy Bees Ltd | Construction | 2022 |
| Mancunian Auto FIX Ltd | Other services | 2022 |
| Mansi Engineering Ltd | Professional & scientific | 2024 |
| Manstock Ltd | Administrative & support | 2022 |
| Manyathi Limited | Health & social care | 2022 |
| MAP Coatings Ltd | Construction | 2022 |
| Mariasilver Ltd | Health & social care | 2022 |
| Marie’S Deli Limited | Hospitality | 2025 |
| Marine Services and Shipping Ltd | Manufacturing | 2009 |
| Mariners Court Preloved Interiors Ltd | Wholesale & retail | 2023 |
| Marjane Clothing Limited | Wholesale & retail | 2023 |
| Mark Barrett Agencies Limited | Wholesale & retail | 2013 |
| Mark Kiln Aerospace Ltd | Manufacturing | 2018 |
| Marketing Influence UK Ltd | Administrative & support | 2024 |
| Marks Parcels Ltd | Transport & logistics | 2018 |
| Marsland Consulting Limited | Professional & scientific | 2022 |
| Martella Limited | Hospitality | 1999 |
| Maruti Retail Ltd | Wholesale & retail | 2020 |
| Marvellous Lord Catering Limited | Hospitality | 2023 |
| Marvin Global Cleaning Ltd | Administrative & support | 2020 |
| Mary Amber Ltd | Professional & scientific | 2023 |
| Mary Amber Security Solution Limited | Administrative & support | 2024 |
| Mary Haworth Beauty Culture Limited | Other services | 2008 |
| Masaood John Brown International Limited | Manufacturing | 2011 |
| Mason and Mason Medical Ltd | Health & social care | 2016 |
| Masood Seller Ltd | Wholesale & retail | 2023 |
| Massage Matthew Ltd | Health & social care | 2025 |
| Massey (F & M) Holdings Limited | Financial services | 2012 |
| Massey Machining Services Limited | Manufacturing | 2012 |
| Master Fade Barber Ashton Ltd | Other services | 2026 |
| Matrix Homes Limited Partnership | | 2014 |
| Maxim International Limited | Wholesale & retail | 2023 |
| Mazmao Limited | Wholesale & retail | 2025 |
| MB Design Limited | Financial services | 2026 |
| MB Transport North West Limited | Transport & logistics | 2025 |
| MB1 Cardboord Ltd | Water & waste | 2026 |
| Mbaa Ltd | Administrative & support | 2015 |
| Mbs-Hub Ltd | Wholesale & retail | 2024 |
| MC Sparks Ltd | Construction | 2018 |
| Mcallister Consulting Services Ltd | Professional & scientific | 2024 |
| Mcdermott & Co Lettings Ltd | Real estate | 2023 |
| Mcdermott & Co Property Agents Ltd | Real estate | 2023 |
| Mcdwyer Developments Ltd | Real estate | 2023 |
| Mcdwyer Estates Ltd | Real estate | 2024 |
| Mcgann Services Ltd | Professional & scientific | 2025 |
| Mcgrouther Legal Limited | Professional & scientific | 2024 |
| Mckenna Stocktake UK Ltd | Professional & scientific | 2022 |
| Mcleavy Asset Management Limited | Financial services | 2023 |
| MCR ALL Wholesale Ltd | Wholesale & retail | 2024 |
| MCR Auto Parts Limited | Wholesale & retail | 2026 |
| MCR HQ CIC | Education | 2022 |
| MCR Transport Ltd | Transport & logistics | 2022 |
| Mcrrigger Ltd | Information & communication | 2023 |
| MD Auctions Ltd | Wholesale & retail | 2019 |
| MDN Healthcare Consulting Ltd | Information & communication | 2020 |
| MDR Autos Limited | Wholesale & retail | 2013 |
| MDW Construction Ltd | Administrative & support | 2019 |
| ME & YOU Studio Ltd | Wholesale & retail | 2008 |
| Meat & Food Ltd | Wholesale & retail | 2025 |
| Medi Solutions (MCR) Limited | Health & social care | 2021 |
| Media 43 Ltd | Professional & scientific | 2015 |
| Media Mill Limited | Information & communication | 2002 |
| Medicivo Medical Ltd | Health & social care | 2022 |
| Mediprop Ltd | Administrative & support | 2000 |
| Medlock Estates (Failsworth) Limited | Real estate | 2012 |
| Medlock Estates Letting Ltd | Real estate | 2013 |
| Medlock Letting (Failsworth) Limited | Real estate | 2012 |
| Medlock Nurseries Ltd | Education | 2021 |
| Medvis International PTY Limited | | 1987 |
| MEG & HMS Properties Ltd | Construction | 2023 |
| MEG Group Ltd | Financial services | 2026 |
| Mega Minds Tech Ltd | Professional & scientific | 2024 |
| Mega-Directories Group C.I.C. | Information & communication | 2026 |
| Megawide General Trading Private Limited | Wholesale & retail | 2025 |
| Melas One Limited | Real estate | 2021 |
| Melisa 2002 Ltd | Transport & logistics | 2019 |
| Meola Bros UK Ltd | Hospitality | 2014 |
| Merchsprout Ltd | Professional & scientific | 2020 |
| Meredith Electrical Distributors Limited | Administrative & support | 2002 |
| Merit Accounting NW Ltd | Professional & scientific | 2023 |
| Metaforceconstruction Ltd | Construction | 2025 |
| Metro Majestic Limited | Arts & recreation | 2024 |
| Metrology Hire UK Limited | Professional & scientific | 2022 |
| Metusa Ltd | Financial services | 2025 |