| Mumps Auto Care & Tyres Ltd | Wholesale & retail | 2025 |
| Mumps Motors Limited | Wholesale & retail | 2026 |
| Mumsbestgroup Ltd | Wholesale & retail | 2025 |
| Mumtaz Bullion Ltd | Wholesale & retail | 2025 |
| Mumtaz Chai (Rochdale) Ltd | Hospitality | 2024 |
| Mumtaz Chai Ltd | Hospitality | 2021 |
| Mumtaz Jewellers Limited | Wholesale & retail | 2018 |
| Mumtaz Oldham Jewellers Limited | Wholesale & retail | 2023 |
| Munchkin Gifts Limited | Wholesale & retail | 2017 |
| Munibakes Ltd | Wholesale & retail | 2024 |
| Municipal Vehicle Services Ltd | Wholesale & retail | 2015 |
| Murabaha Finance Limited | Administrative & support | 2024 |
| Murji and Co Limited | Construction | 2011 |
| Murphy Flooring Ltd | Construction | 2025 |
| Murphy Manor Investments Ltd | Real estate | 2024 |
| Murray (Scientific Instruments) Ltd | Manufacturing | 2015 |
| Murshad Security Limited | Administrative & support | 2026 |
| Musa Flow Facilities Ltd | Wholesale & retail | 2025 |
| Musawenkosi Limited | Health & social care | 2017 |
| Muse by OZ Ltd | Information & communication | 2025 |
| Mushtaq Online Hub Ltd | Wholesale & retail | 2025 |
| Music Direct Limited | Wholesale & retail | 2014 |
| Muslcepower Trading Ltd | Wholesale & retail | 2017 |
| Mustafa Barbers Limited | Other services | 2025 |
| Mustafa Holdings Ltd | Financial services | 2025 |
| Mustafa Medical Services Ltd | Health & social care | 2023 |
| Musters Road Management Company Limited | Households | 1987 |
| Muttley Crew Dogs Ltd | Other services | 2019 |
| Muzingaye Limited | Health & social care | 2016 |
| MV Discount Limited | Wholesale & retail | 2024 |
| MV Essentials Ltd | Wholesale & retail | 2019 |
| MV Innovations Limited | Professional & scientific | 2020 |
| MV Property & Development Ltd | Construction | 2019 |
| MVA Estates Ltd | Real estate | 2020 |
| MVG (North West) Ltd | Hospitality | 2018 |
| MW Elegant Limited | Wholesale & retail | 2025 |
| MW Financial Consultancy Limited | Financial services | 2016 |
| MW Happyhouses Limited | Real estate | 2022 |
| MW Motors Oldham Ltd | Wholesale & retail | 2024 |
| MW21 Ltd | Wholesale & retail | 2021 |
| Mwesuk Ltd | Wholesale & retail | 2014 |
| Mwhub Ltd | Wholesale & retail | 2018 |
| MWS Onbuy UK Ltd | Wholesale & retail | 2026 |
| Mwvk Consulting Limited | Professional & scientific | 2021 |
| Mxhq Ltd | Hospitality | 2025 |
| My Chocolate Bouquet Ltd | Wholesale & retail | 2020 |
| My Designer Clothing Ltd | Wholesale & retail | 2021 |
| My DOO Ltd | Information & communication | 2025 |
| My Driving School Ltd | Education | 2024 |
| My Elec Group Ltd | Administrative & support | 2016 |
| My Energy Limited | Professional & scientific | 2012 |
| My Fitted Bedroom Limited | Wholesale & retail | 2016 |
| My Fitted Furniture Limited | Wholesale & retail | 2016 |
| My Fitted Kitchen Limited | Wholesale & retail | 2016 |
| My IT Products Limited | Information & communication | 2008 |
| My Khans Kebab Ltd | Hospitality | 2025 |
| My Local Shop Ltd | Wholesale & retail | 2018 |
| My Locksmith Ltd | Other services | 2021 |
| My Mirpur Ltd | Hospitality | 2026 |
| My Motor Trader Ltd | Wholesale & retail | 2025 |
| My Pixel Print Ltd | Manufacturing | 2024 |
| My Royton Pizza Ltd | Hospitality | 2026 |
| My Secret Boutique Ltd | Wholesale & retail | 2024 |
| My Secret House Ltd | Professional & scientific | 2018 |
| My Smart Opportunity Ltd. | Professional & scientific | 2022 |
| My Sneakers Club Ltd | Wholesale & retail | 2021 |
| My Support Worker (NW) Ltd | Health & social care | 2019 |
| My Travel Info (UK) Ltd | Other services | 2023 |
| My Virtual Trainer Ltd | Arts & recreation | 2019 |
| My Way Consulting Limited | Information & communication | 2010 |
| My-Index Ltd | Professional & scientific | 2025 |
| Mycoldhurst Ltd | Other services | 2025 |
| Mygd Ltd | Wholesale & retail | 2024 |
| MYK Properties Ltd | Real estate | 2020 |
| Mykezy Ltd | Information & communication | 2017 |
| Mypaye Ltd | Information & communication | 2012 |
| Myregdata Ltd | Administrative & support | 2016 |
| Mysie Exclusive Limited | Wholesale & retail | 2026 |
| Myway Clinic Ltd | Wholesale & retail | 2026 |
| Myzizi Design and Print Ltd | Manufacturing | 2022 |
| MZ Recruitment & Consultancy Limited | Professional & scientific | 2026 |
| MZ Roofing Solutions Ltd | Construction | 2025 |
| MZA Accounting Service Limited | Professional & scientific | 2026 |
| MZF Group Ltd | Real estate | 2016 |
| MZK Property Investments Ltd | Real estate | 2022 |
| MZS Solutions Ltd | Other services | 2013 |
| N & K Textiles Ltd | Wholesale & retail | 2019 |
| N a Baxter Plumbing & Heating Services Ltd | Construction | 2023 |
| N Evans Roofing Ltd | Construction | 2024 |
| N G Media Limited | Information & communication | 2003 |
| N H Motors Limited | Wholesale & retail | 2019 |
| N Hamilton Plumbing Limited | Construction | 2022 |
| N Hoque Trading Ltd | Wholesale & retail | 2024 |
| N J Henshall Limited | Hospitality | 2023 |
| N K Hair Studio Limited | Other services | 2012 |
| N T Event Music Ltd | Administrative & support | 2025 |
| N W Ventures Ltd | Hospitality | 2023 |
| N Zaheer Ltd | Health & social care | 2023 |
| N&G Homes Ltd | Real estate | 2024 |
| N&G Solutions Ltd | Administrative & support | 2018 |