| Manchester Locations Limited | Administrative & support | 2019 |
| Manchester Mandarin School | Education | 2012 |
| Manchester Marketing Solutions Limited | Information & communication | 2020 |
| Manchester Medical Secretaries Limited | Administrative & support | 2013 |
| Manchester Medics Limited | Health & social care | 2013 |
| Manchester Meet and Greet Limited | Administrative & support | 2016 |
| Manchester Office Solutions Ltd | Wholesale & retail | 2024 |
| Manchester Online College Ltd | Education | 2020 |
| Manchester Padel Limited | Arts & recreation | 2023 |
| Manchester Plastic Surgery Ltd | Health & social care | 2011 |
| Manchester Presents Ltd | Hospitality | 2025 |
| Manchester Prestigious Ltd | Health & social care | 2026 |
| Manchester Property Holdings Limited | Real estate | 2017 |
| Manchester Respiratory Care Limited | Public administration | 2024 |
| Manchester Road Ltd | Real estate | 2017 |
| Manchester Road Marketing Ltd | Administrative & support | 2022 |
| Manchester Screeding Co Ltd | Professional & scientific | 2009 |
| Manchester Sightseeing Tours Limited | Administrative & support | 2017 |
| Manchester Spinal Clinic Limited | Health & social care | 2016 |
| Manchester Still Ltd. | Manufacturing | 2016 |
| Manchester Uroradiology Ltd | Information & communication | 2021 |
| Manchester Women's Health Limited | Health & social care | 2019 |
| Manchesters Homes Ltd | Construction | 2020 |
| Mancunia Stays Ltd | Households | 2026 |
| Mancunian Fencing Limited | Construction | 2016 |
| Mancunian Mercantile Investments Ltd | Professional & scientific | 1982 |
| Mancunian Way Productions Ltd | Information & communication | 2019 |
| Mandarin Creative Ltd | Wholesale & retail | 2004 |
| Mandarin International Brands Ltd | Wholesale & retail | 2007 |
| Mandarin Licensing Limited | Administrative & support | 2015 |
| Maneform Limited | Professional & scientific | 2026 |
| Manhaz Medical Ltd | Health & social care | 2021 |
| Manifold Magic Ltd | Information & communication | 2024 |
| Manjeave Limited | Professional & scientific | 2023 |
| Mankind Direct Limited | Wholesale & retail | 2000 |
| Mann & Co. Limited | Professional & scientific | 1973 |
| Manndelin Investments Ltd | Professional & scientific | 2006 |
| Manning Consultancy Services Limited | Administrative & support | 2012 |
| Manor Cottages Laundry Services Limited | Extraterritorial | 2016 |
| Manor Cottages Property Services (South) Ltd | Extraterritorial | 2014 |
| Manor Cottages Property Services Limited | Administrative & support | 2011 |
| Manor Cottages UK Company Limited | Extraterritorial | 2006 |
| Manor Croft Developments Ltd. | Construction | 2003 |
| Manor Park Real Estate Limited | Real estate | 2024 |
| Manor Street Factory Limited | Real estate | 2020 |
| Manse House Management Company Limited | Households | 2007 |
| Mansion Gardens (Phase 2) Residents Company Limited | Households | 2005 |
| Mansion Gardens Residents Company Limited | Households | 2004 |
| Manta RAY Homes Limited | Construction | 2026 |
| Manta Software Consultancy Ltd | Information & communication | 2011 |
| Mantis Proptech Ltd | Information & communication | 2017 |
| Mantrailing UK Ltd | Other services | 2018 |
| Manufacturing Excellence Consultants Ltd | Information & communication | 2013 |
| Manvi Solutions Ltd | Real estate | 2023 |
| Mape Capital Investments UK Ltd | Professional & scientific | 2026 |
| Maple (167) Limited | Households | 2002 |
| Maple Green Real Estate Limited | Real estate | 2017 |
| Maple Leaf Care Limited | Administrative & support | 2006 |
| Maple Road Management Company Limited | Households | 2004 |
| Maple TEN Limited | Administrative & support | 2021 |
| Mapleoak Investments Ltd | Financial services | 2010 |
| Maralyn Interiors Limited | Professional & scientific | 2014 |
| Marber Global Limited | Administrative & support | 2013 |
| Marber Promotions & Marketing Ltd | Administrative & support | 1998 |
| March Kenyon Limited | Professional & scientific | 2016 |
| Marche Enterprises Limited | Professional & scientific | 2004 |
| Marco Rea's MR. Reallygood Limited | Manufacturing | 2017 |
| Mares Investments Limited | Real estate | 2014 |
| Maria G Ltd | Real estate | 2024 |
| Mariam Saghir Limited | Wholesale & retail | 2026 |
| Marina Drilling Limited | Administrative & support | 2013 |
| Marisha Wolfryd Limited | Professional & scientific | 2026 |
| Maristo Properties Ltd | Real estate | 2018 |
| Maritime Discovery Limited | Health & social care | 2020 |
| Maritime Property Limited | Real estate | 2021 |
| MARITIME2050 Limited | Professional & scientific | 2022 |
| Mark Amsden Associates Limited | Professional & scientific | 2018 |
| Mark Bevan Construction Limited | Professional & scientific | 2014 |
| Mark Jones Online Personal Training Ltd | Other services | 2018 |
| Mark Lane Estates Limited | Real estate | 2019 |
| Mark Peters Property Solutions Ltd | Construction | 2019 |
| Mark Tilbury Ltd | Transport & logistics | 2015 |
| Market Court Altrincham Ltd | Real estate | 2016 |
| Marketing Analytica Consulting Group Ltd | Information & communication | 2020 |
| Marketing Beacon Ltd | Professional & scientific | 2026 |
| Marketing Insite Limited | Professional & scientific | 2000 |
| Markfield Sports Management Limited | Arts & recreation | 2010 |
| Markovic Ltd | Wholesale & retail | 2026 |
| Marksman Marketing Ltd | Professional & scientific | 2023 |
| Marl Engineering Limited | Professional & scientific | 2022 |
| Marlin Technical Engineering Ltd. | Administrative & support | 1998 |
| Marlize Enterprises Limited | Professional & scientific | 2025 |
| Marmalade Early Years Consultancy Ltd | Health & social care | 2021 |
| MARRIAGE4LIFE Limited | Other services | 2025 |
| Marshall Bridge Ventures Limited | Financial services | 2026 |
| Marshall Events Group Limited | Administrative & support | 2018 |
| Marshall New Energy Limited | Professional & scientific | 2009 |
| Marshall Professional Development Limited | Education | 2020 |
| Marshall Training & Education Limited | Administrative & support | 2026 |
| Marsland DRY Cleaners Limited | Other services | 2013 |