| Messenger Express Logistics Ltd | Transport & logistics | 2022 |
| Messersi UK Limited | Wholesale & retail | 2013 |
| Metico Ltd | Wholesale & retail | 2025 |
| Metpark U.K. Ltd | Construction | 2005 |
| Metro Flue Limited | Construction | 2026 |
| Metym Realty Limited | Real estate | 2021 |
| MF Products Ltd | Wholesale & retail | 2019 |
| Mfuk Group Ltd | Financial services | 2022 |
| Michal Kedzierski Ltd | Wholesale & retail | 2025 |
| Midstream (West Lancs) Limited | Education | 1995 |
| Mienna Cosmetics Ltd | Wholesale & retail | 2024 |
| Mihai Cristian Limited | Transport & logistics | 2013 |
| Milan Logistics Ltd | Transport & logistics | 2022 |
| Millhouse Training Limited | Administrative & support | 2009 |
| Millican Holdings Limited | Financial services | 2023 |
| Millican Opticians (Moreton) Limited | Wholesale & retail | 2023 |
| Millican Opticians (Prescot) Limited | Wholesale & retail | 2023 |
| Millstead Retreats Ltd | Hospitality | 2025 |
| Milos Marketplace Limited | Wholesale & retail | 2024 |
| Mima Media Ltd | Health & social care | 2022 |
| Mindful Connections CIC | Health & social care | 2025 |
| Mindsight Clinic Limited | Health & social care | 2026 |
| Mironia Trans Ltd | Transport & logistics | 2017 |
| Miss Shiny Cleaning Service Limited | Administrative & support | 2021 |
| Misskick Ltd | Wholesale & retail | 2018 |
| Mitchell Spraybooths Limited | Manufacturing | 2018 |
| MIZ Foods Ltd | Hospitality | 2025 |
| MJ Dentistry Limited | Health & social care | 2026 |
| MJM Foods (Wigan) Ltd | Hospitality | 2011 |
| MJM Property (Wigan) Limited | Real estate | 2017 |
| Mlpl Riley Recruitment Ltd | Administrative & support | 2025 |
| MMG Automobile Ltd | Wholesale & retail | 2026 |
| Mobberley Road Clinic Limited | Health & social care | 2021 |
| Mobiles Xpress Ltd | Manufacturing | 2025 |
| Modern EON Limited | Arts & recreation | 2021 |
| Molive Group Ltd | Information & communication | 2025 |
| Momothyo Limited | Financial services | 2022 |
| Morelifeacademy Ltd | Other services | 2022 |
| Morethan Engineering Ltd | Manufacturing | 2025 |
| Moss Side Cottage Joinery and Building Services Ltd | Construction | 2021 |
| Motasave Ltd | Wholesale & retail | 2019 |
| Motion Plumbing & GAS Ltd | Construction | 2025 |
| Motion Signs & Graphics Ltd | Construction | 2021 |
| Mower MEN Limited | Wholesale & retail | 2006 |
| MOX Commerce UK Ltd | Wholesale & retail | 2026 |
| MR. Silvershine Limited | Wholesale & retail | 2021 |
| Mroza Ltd | Financial services | 2021 |
| MTG Digital Ltd | Information & communication | 2022 |
| MTS Holdings (North West) Limited | Financial services | 2023 |
| MTS Red Rose Limited | Construction | 2023 |
| Mulino RM Ltd | Hospitality | 2020 |
| Multiflex Solutions Ltd | Extraterritorial | 2013 |
| Muncaster Creative Ltd | Information & communication | 2019 |
| Muncaster Services Ltd | Transport & logistics | 2015 |
| Munchies Burger Bar Ltd | Hospitality | 2025 |
| Music Enlights CIC | Information & communication | 2023 |
| Musica Productions Limited | Information & communication | 2015 |
| My Choices NW Social Enterprise CIC | Health & social care | 2016 |
| My Health Online Ltd | Health & social care | 2020 |
| My Prescribing Limited | Health & social care | 2026 |
| MZK Holdings (NW) Limited | Financial services | 2025 |
| N.P.Plumbing Services Ltd | Construction | 2017 |
| N.V by Group Ltd | Other services | 2024 |
| N.V by Laura Limited | Other services | 2022 |
| N7 Glazing Limited | Construction | 2018 |
| Nanako Ltd | Real estate | 2014 |
| National Bike Marshals Group Ltd | Extraterritorial | 2018 |
| National Click Media Ltd | Professional & scientific | 2026 |
| NAW Healthcare Consultancy Ltd | Information & communication | 2025 |
| Naylor Roofing Limited | Construction | 2026 |
| NEA Montage Ltd | Administrative & support | 2024 |
| NEB Trades Limited | Construction | 2023 |
| Nelson Family Properties Limited | Real estate | 2017 |
| Net-Zero Building Supplies Ltd | Wholesale & retail | 2018 |
| Net-Zero Homes Ltd | Construction | 2018 |
| Netafim UK Limited | Wholesale & retail | 1994 |
| Neurocosy Ltd | Wholesale & retail | 2026 |
| New Motion Contracting Services Limited | Construction | 2021 |
| Nexhold Capital Ltd | Real estate | 2025 |
| Next Step Studios Limited | Education | 2013 |
| NFI International Limited | Professional & scientific | 2019 |
| NGS Recruitment Limited | Administrative & support | 2017 |
| Nick Oliver Engineering Ltd | Professional & scientific | 2023 |
| Nicolzol Ltd | Transport & logistics | 2025 |
| Nigas Group PVT Ltd | Administrative & support | 2016 |
| Nigas PVT Ltd | Real estate | 2024 |
| Nigas Trading Ltd | Wholesale & retail | 2026 |
| Niro Taping & Jointing Ltd | Construction | 2024 |
| NJ Contracts Ltd | Construction | 2024 |
| NJS Recruitment Ltd | Administrative & support | 2024 |
| Noble Engineering Consultancy Limited | Professional & scientific | 2023 |
| Noble-Asco Limited | Manufacturing | 2012 |
| Noblet Municipal Services Limited | Extraterritorial | 1997 |
| Norkaitis Limited | Transport & logistics | 2020 |
| North West Construction Ltd | Construction | 2021 |
| North West Wrapping Limited | Professional & scientific | 2021 |
| Northwest Fencing Services Ltd | Construction | 2025 |
| Northwest Powersports Ltd | Wholesale & retail | 2015 |
| Novus Studios Ltd | Wholesale & retail | 2026 |
| NRG Fleet Holdings Limited | Professional & scientific | 2017 |