| Movement Therapies Ltd | Public administration | 2023 |
| Moviescape ASH Ltd | Arts & recreation | 2017 |
| Moving Forward Care Ltd | Health & social care | 2017 |
| Moving in Ltd | Real estate | 2021 |
| MP Cars Northwest Limited | Wholesale & retail | 2026 |
| MP Civils & Groundworks Limited | Construction | 2020 |
| MP Griffiths Holdings Limited | Extraterritorial | 2011 |
| Mp&H Packaging Limited | Extraterritorial | 2018 |
| MPE Building Services Ltd | Construction | 2024 |
| Mpeople Recruitment Limited | Administrative & support | 2013 |
| MPG MOT Station Ltd | Wholesale & retail | 2025 |
| MPH PUB Enterprises Ltd | Hospitality | 2019 |
| MQW Pharma Limited | Health & social care | 2024 |
| MR & MRS Desserts Limited | Hospitality | 2025 |
| MR DOT Personal Shopper Limited | Wholesale & retail | 2021 |
| MR Marvellous Limited | Administrative & support | 2021 |
| MR Mobilez Ltd | Wholesale & retail | 2023 |
| MR Moon Ltd | Wholesale & retail | 2026 |
| MR Pizza Leigh Ltd | Hospitality | 2011 |
| MR Soft Limited | Information & communication | 2020 |
| MR Takeaway Ltd | Hospitality | 2025 |
| MR Therapy Limited | Health & social care | 2024 |
| MRA3 Ltd | Hospitality | 2026 |
| Mrchrissyservices Ltd | Information & communication | 2020 |
| MRD 1979 Limited | Hospitality | 2021 |
| MRK Associates Limited | Administrative & support | 2003 |
| MRS Healthcare Ltd | Wholesale & retail | 2007 |
| MRV Property Group Limited | Real estate | 2021 |
| MRV Restaurant Group Limited | Financial services | 2013 |
| MS & Co Consultants Ltd | Professional & scientific | 2020 |
| MS Builders Sale Ltd | Construction | 2024 |
| MS Flooring Ltd | Wholesale & retail | 2024 |
| MS Fusion Foods Ltd | Hospitality | 2021 |
| MS Logistics Oldham Ltd | Transport & logistics | 2018 |
| MS Ramzan Ltd | Health & social care | 2012 |
| MS Saleem Holdings Ltd | Financial services | 2023 |
| MS Saleem Properties Ltd | Real estate | 2023 |
| MS Trade Sales Ltd | Wholesale & retail | 2023 |
| MSA Management Consultancy Ltd | Real estate | 2023 |
| MSC Property Maintenance Ltd | Construction | 2026 |
| MSH Integrated System Solutions Limited | Information & communication | 2018 |
| MSH Living Limited | Real estate | 2024 |
| MSH Mini Market Ltd | Wholesale & retail | 2023 |
| MSH Trading Limited | Wholesale & retail | 2024 |
| MSI Holdings Ltd | Real estate | 2025 |
| MSK Groundworks and Agricultural Services Limited | Agriculture & fishing | 2018 |
| MSL (Oldham) Limited | Administrative & support | 2016 |
| MSM Automotive Ltd | Wholesale & retail | 2024 |
| MSM Cycling Ltd | Wholesale & retail | 2025 |
| MSM Furniture Ltd | Wholesale & retail | 2018 |
| MSM Takeaway Ltd | Hospitality | 2024 |
| MSP Construction Services Ltd | Extraterritorial | 2005 |
| MSP1 Consulting Limited | Information & communication | 2021 |
| Mspec EU Limited | Professional & scientific | 2005 |
| Msrq Transports Ltd | Transport & logistics | 2025 |
| MSU Services Limited | Households | 2023 |
| MSW Engineering Recruitment Ltd | Administrative & support | 2021 |
| MT Construction 2024 Limited | Construction | 2024 |
| Mtaj Limited | Health & social care | 2024 |
| MTB Fitness Ltd | Arts & recreation | 2017 |
| Mteirek Ltd | Health & social care | 2008 |
| MTI Managers Limited | Financial services | 1982 |
| MTI Partners Limited | Financial services | 1995 |
| MTI Partnership LLP | | 2007 |
| MTI UPF Carried Interest Partner LLP | | 2018 |
| MTI UPF Founder Partner Limited | Financial services | 2008 |
| MTI UPF General Partner Limited | Financial services | 2008 |
| MTI UPF Holdings Limited | Financial services | 2008 |
| MTI Ventures Limited Partnership | | 1990 |
| MTI3 B Limited Partnership | | 1997 |
| MTI3 Limited Partnership | | 1997 |
| MTI4 'B' Limited Partnership | | 2000 |
| MTI4 General Partner Limited | Financial services | 1999 |
| MTI4 Limited Partnership | | 2000 |
| Mtkcc Ltd | Health & social care | 2019 |
| MTM Property Services Ltd | Real estate | 2020 |
| Mtqcoaching Ltd | Other services | 2025 |
| MTR Construction Limited | Construction | 2024 |
| MU53HOL Homes Limited | Real estate | 2023 |
| Mualab Ltd | Information & communication | 2017 |
| Muallim Siddiq Ltd | Education | 2024 |
| Mubby Ltd | Hospitality | 2024 |
| Muck Mate Haulage Ltd | Transport & logistics | 2025 |
| Mucky Pups Groomery Ltd | Professional & scientific | 2020 |
| Mudassar Munir Ltd | Wholesale & retail | 2019 |
| Mudslingerz Tyres Limited | Wholesale & retail | 2026 |
| Mueller Donnelly Finance Limited | Administrative & support | 2017 |
| Muffys Catering Ltd | Hospitality | 2025 |
| Muhammad Anwar (NW) Ltd | Health & social care | 2023 |
| Muhammad Babar Gondal Ltd | Other services | 2025 |
| Muhammad Enterprise Limited | Hospitality | 2025 |
| Muhammad Faizan Khan Ltd | Wholesale & retail | 2026 |
| Mulholland & Co Accountants Limited | Professional & scientific | 2017 |
| Mulholland Spence Accountants Limited | Professional & scientific | 2019 |
| Multi Skilled Affordable Builders Limited | Construction | 2025 |
| Multi Trade Plus Limited | Construction | 2010 |
| Multiabbey Trading Limited | Wholesale & retail | 2002 |
| Multimed Limited | Health & social care | 2014 |
| Multybuyingchoice Ltd | Other services | 2023 |
| Mumdoc Properties Ltd | Real estate | 2022 |