| Makemore Limited | Professional & scientific | 1998 |
| Maker's House Revival Ministries Ltd | Health & social care | 2024 |
| Makin Organs Limited | Manufacturing | 1994 |
| Makinia Property Ltd | Real estate | 2024 |
| Makkar Family Ltd | Real estate | 2025 |
| Maks Media Ltd | Professional & scientific | 2024 |
| Makygroup Limited | Households | 2020 |
| Malaika's Oldham Limited | Wholesale & retail | 2013 |
| Malbro Developments Ltd | Construction | 2005 |
| Malbro Investments Ltd | Construction | 2001 |
| Malcolm Firth Projects Limited | Real estate | 2004 |
| Malik (Oldham) Ltd | Manufacturing | 2018 |
| Malik Fazal DAD Funeral Reserve CIC | Other services | 2026 |
| Malik Pharma Ltd | Wholesale & retail | 2021 |
| Mallalieu's Ltd | Manufacturing | 2017 |
| Mallinson's of Oldham Limited | Manufacturing | 1983 |
| MAM GAS Services Ltd | Manufacturing | 2026 |
| MAM Projects Ltd | Construction | 2012 |
| Mama Health and Poverty Partnership (Mhapp) CIC | Health & social care | 2022 |
| Mama's Fried Chicken Ltd | Hospitality | 2025 |
| Mamas Pizza Oldham Ltd | Hospitality | 2022 |
| Mammoth Engineering Services Ltd | Professional & scientific | 2019 |
| Mamod Limited | Manufacturing | 1992 |
| MAN PAN & Van Ltd | Hospitality | 2024 |
| MAN Security Services Ltd | Administrative & support | 2025 |
| Managed IT Solutions & Support Limited | Information & communication | 2021 |
| Management Made Simple Limited | Professional & scientific | 2015 |
| Manaza & Sons Properties Ltd | Real estate | 2018 |
| Mance Rowe Ltd | Real estate | 2023 |
| Mancen Cleaning Limited | Other services | 2024 |
| Manchester & Cheshire Ltd | Wholesale & retail | 2019 |
| Manchester Accounting Services Ltd. | Professional & scientific | 2018 |
| Manchester Aluminium Doors Limited | Construction | 2017 |
| Manchester Angling Club Ltd | Agriculture & fishing | 2025 |
| Manchester Automotive Detailing LAB Limited | Administrative & support | 2025 |
| Manchester AV Ltd | Wholesale & retail | 2024 |
| Manchester Bureau of Merchants Ltd | Wholesale & retail | 2009 |
| Manchester BUS and Coach Services Ltd | Financial services | 2024 |
| Manchester Business Coaching Ltd | Professional & scientific | 2015 |
| Manchester Cabins Limited | Administrative & support | 1983 |
| Manchester Cleaning Solutions Ltd | Administrative & support | 2025 |
| Manchester Construction and Development Ltd | Construction | 2021 |
| Manchester Crystal Solution Limited | Real estate | 2025 |
| Manchester Decorating Solutions Ltd | Construction | 2023 |
| Manchester Direct Delivery Service Ltd | Transport & logistics | 2018 |
| Manchester DJ Ltd | Arts & recreation | 2023 |
| Manchester Doors Ltd | Manufacturing | 2023 |
| Manchester Electricians Limited | Administrative & support | 2014 |
| Manchester Electroplating Ltd | Manufacturing | 1995 |
| Manchester Engine Parts Ltd | Wholesale & retail | 2025 |
| Manchester Fitting Solutions Limited | Construction | 2012 |
| Manchester Food & Wine Ltd | Wholesale & retail | 2026 |
| Manchester Grab Hire and Aggregates Ltd | Wholesale & retail | 2021 |
| Manchester Hire Limited | Administrative & support | 2026 |
| Manchester International Airport Transport L.P. | | 2023 |
| Manchester Menopause Clinic Ltd | Health & social care | 2025 |
| Manchester Mezz Floors Ltd | Construction | 2026 |
| Manchester Music Group Ltd | Information & communication | 2022 |
| Manchester Pallet Playground Co. Ltd | Other services | 2025 |
| Manchester Picture & Sports Framing Limited | Manufacturing | 2006 |
| Manchester Premier Autos Ltd | Wholesale & retail | 2024 |
| Manchester Pressure Clean Limited | Administrative & support | 2013 |
| Manchester Recovery Ltd | Transport & logistics | 2021 |
| Manchester Recovery Service Ltd | Transport & logistics | 2014 |
| Manchester Smart Repair Ltd | Administrative & support | 2022 |
| Manchester Taxi Fleet Ltd | Administrative & support | 2020 |
| Manchester Trading Solutions Ltd | Education | 2011 |
| Manchester Turbos Ltd | Wholesale & retail | 2011 |
| Manchester Vehicle Specialist Ltd | Wholesale & retail | 2021 |
| Manchester Wardrobes Ltd | Wholesale & retail | 2026 |
| Manchester Wind Services Ltd | Construction | 2021 |
| Manchester Winter ALE House Ltd | Wholesale & retail | 2023 |
| Manchesters Finest Ltd | Construction | 2025 |
| Mancienne 8 Ltd | Other services | 2024 |
| Mancs Properties Ltd | Real estate | 2026 |
| Mancunian Pancake Limited | Hospitality | 2023 |
| Mandrake Consultancy Limited | Professional & scientific | 2019 |
| Mandri AK Ltd | Wholesale & retail | 2023 |
| Mandyland Ltd. | Administrative & support | 2011 |
| Mane by KW Ltd | Other services | 2015 |
| Maned Wolf Ltd | Financial services | 2022 |
| Manes Hair and Beauty Salon Limited | Other services | 2026 |
| Manes Hair Extensions Ltd | Other services | 2024 |
| Mann Media Productions Limited | Information & communication | 2009 |
| Mannajot Limited | Wholesale & retail | 2025 |
| Mannan Properties Limited | Real estate | 2025 |
| Manor House Barn Limited | Arts & recreation | 2018 |
| Manor House Car Sales Ltd | Financial services | 2024 |
| Manor House Motors Ltd | Wholesale & retail | 2012 |
| Manor Property Letting Agents Limited | Real estate | 2017 |
| Manpak Limited | Manufacturing | 2012 |
| Manson Engineering (NW) Limited | Other services | 2024 |
| Mantague Warehouse Storage Ltd | Transport & logistics | 2018 |
| Mantis Social Ltd | Professional & scientific | 2026 |
| Manu's Coaching Ltd | Professional & scientific | 2025 |
| Manus Motors Ltd | Wholesale & retail | 2020 |
| Manza Property (Management) Limited | Real estate | 2002 |
| MAP Building Contractors Ltd | Construction | 2021 |
| MAP Dental Care Limited | Health & social care | 2009 |
| Maple Enterprises Ltd | Wholesale & retail | 2024 |