| Morderncharm Ltd | Health & social care | 2026 |
| More Than Words Advocacy Community Interest Company | Health & social care | 2011 |
| More Wood Ltd | Other services | 2025 |
| Morefloors Ltd | Construction | 2025 |
| Morgan Keith Limited | Hospitality | 2026 |
| Morgan Properties North West Limited | Real estate | 2022 |
| Morluc | Professional & scientific | 2023 |
| Morris Properties North West Ltd | Real estate | 2019 |
| Morrisons.Uk.Ltd | Construction | 2007 |
| Morstacks Ltd | Real estate | 2024 |
| Mort & Sons Ltd | Real estate | 2024 |
| Mortar Capital Investments Limited | Financial services | 2019 |
| Mortimer Bradford HR Ltd | Professional & scientific | 2008 |
| Morwyn Code Limited | Information & communication | 2025 |
| Mosaic Learning Trust | Education | 2016 |
| Mosies Property Limited | Real estate | 2023 |
| Mossop Consultancy Ltd | Professional & scientific | 2024 |
| Mossop Management Limited | Professional & scientific | 2014 |
| Mostell Limited | Wholesale & retail | 2000 |
| MOT Commercials Ltd | Water & waste | 2017 |
| Motacraft Ltd | Manufacturing | 2018 |
| Mothergreen Trading Ltd | Wholesale & retail | 2026 |
| Motion Elevators Ltd | Manufacturing | 2006 |
| Motivated Minds Project Community Interest Company | Education | 2018 |
| Motodms Ltd | Information & communication | 2021 |
| Motorcycle Centre Orrell Limited | Wholesale & retail | 2000 |
| Motormec Limited | Wholesale & retail | 2009 |
| Motoron Service Centre Limited | Wholesale & retail | 2003 |
| Motorside Performance Ltd | Wholesale & retail | 2026 |
| Motorsport Circuit Management Limited | Arts & recreation | 2004 |
| Motorsport Race Plastics UK Ltd | Manufacturing | 2025 |
| Motorstart Limited | Wholesale & retail | 2008 |
| Motorstart MOT and Tyre Centre Ltd | Wholesale & retail | 2018 |
| Motoworld Limited | Wholesale & retail | 1998 |
| Mount Auto Repairs Limited | Extraterritorial | 2003 |
| Move More EAT Less Coaching Limited | Extraterritorial | 2023 |
| Mowertec (Wigan) Ltd | Manufacturing | 2013 |
| Moxitas | Professional & scientific | 2025 |
| Moxon Electrical Limited | Construction | 2007 |
| Moziv Limited | Transport & logistics | 2023 |
| MP Eco Skips Wigan Ltd | Water & waste | 2026 |
| MP Plant Hire Limited | Administrative & support | 2026 |
| MP Plastering & Rendering Ltd | Construction | 2022 |
| MP78 Driving Services Ltd | Transport & logistics | 2025 |
| MPB Surveys Limited | Construction | 2023 |
| MPC Property Group Ltd | Real estate | 2023 |
| MPN Services Ltd | Real estate | 2003 |
| Mprs Engineering Ltd | Professional & scientific | 2013 |
| MPT Motors Ltd | Wholesale & retail | 2025 |
| MPV Trading Limited | Financial services | 2026 |
| MR COD and Chip Limited | Hospitality | 2025 |
| MR CUT Barber Ltd | Other services | 2025 |
| MR Joes 31 Ltd | Hospitality | 2024 |
| MR Pink Artist Ltd | Arts & recreation | 2024 |
| MR Soot Chimney Services Ltd | Administrative & support | 2017 |
| MR Soot Chimney Sweep Ltd | Administrative & support | 2021 |
| MR Soot Training Centre Ltd | Education | 2023 |
| MR Soot Training Ltd | Education | 2023 |
| MR Tech Mobile & PC Ltd | Manufacturing | 2021 |
| Mreel Ltd | Wholesale & retail | 2024 |
| Mrjj Properties Ltd | Real estate | 2026 |
| Mrmattwright Inc Limited | Information & communication | 2018 |
| MRS Lyon's Tea Room Limited | Hospitality | 2015 |
| MRW Heating & Maintenance Limited | Construction | 2022 |
| MRW Homes Limited | Real estate | 2024 |
| MS Elite Contractors Ltd | Construction | 2025 |
| MS Homes & Lettings Ltd | Real estate | 2026 |
| MS N Designs Ltd | Professional & scientific | 2013 |
| MS Properties NW Ltd | Real estate | 2024 |
| MS Psychology Perfect Ltd | Education | 2020 |
| MS Sign Installation Limited | Construction | 2016 |
| MSA Training & Events Ltd | Education | 2026 |
| MSC Exec Solutions Ltd | Administrative & support | 2024 |
| MSD Retail Limited | Wholesale & retail | 2013 |
| MSD Services International Ltd | Administrative & support | 2024 |
| MSG Interior Ltd | Construction | 2023 |
| MSL Cars Limited | Wholesale & retail | 2024 |
| Msme Ltd | Transport & logistics | 2025 |
| MSR Invest Limited | Real estate | 2026 |
| MT Engineering Services Limited | Information & communication | 2018 |
| MT GAS Services (NW) Ltd | Construction | 2018 |
| Mtate Ltd | Professional & scientific | 2023 |
| MTL Cargo Ltd | Transport & logistics | 2022 |
| MTM Trading (North West) Limited | Transport & logistics | 2014 |
| MTR Autos Ltd | Other services | 2007 |
| MTS Resources Management Ltd | Real estate | 2025 |
| MTS Speed Limited | Transport & logistics | 2017 |
| Mtsh Limited | Professional & scientific | 2014 |
| Mubzy Ltd | Hospitality | 2025 |
| Much More Than Tapas Ltd | Hospitality | 2021 |
| MUD PIE Productions Ltd | Manufacturing | 2022 |
| Muddykidz Ltd | Manufacturing | 2023 |
| Mudhuts Media Ltd | Information & communication | 2011 |
| Mudugal Locum Services Limited | Health & social care | 2016 |
| Mulberry Point Limited | Professional & scientific | 2023 |
| Mullen Geoservices Ltd | Professional & scientific | 2025 |
| Mullmellors Limited | Real estate | 2024 |
| Multi Care Integrated Ltd | Health & social care | 2026 |
| Multiverse Pictures Ltd | Information & communication | 2012 |
| Mummentum Ltd | Professional & scientific | 2025 |