| Milly & Miles Learning Ltd | Education | 2009 |
| Mindfit North West C.I.C. | Education | 2013 |
| Mitchell Winstanley Limited | Wholesale & retail | 2025 |
| Mitton Agricultural Ltd | Agriculture & fishing | 2017 |
| Mitton Bible College Ltd | Education | 2025 |
| MJS DRY Liners Limited | Construction | 2003 |
| MJW Systems Limited | Professional & scientific | 2013 |
| Mmk-Surg Ltd | Health & social care | 2024 |
| MNX Cafe Ltd | Hospitality | 2025 |
| Moat House Lettings Ltd | Hospitality | 2025 |
| Modular Concepts Ltd | Wholesale & retail | 2020 |
| Moduplan Limited | Construction | 2014 |
| Moist 2000 Ltd | Administrative & support | 2021 |
| Monarch Property and Developments Limited | Real estate | 2026 |
| Money Bricks UK Ltd | Real estate | 2019 |
| Monos Investments Ltd | Financial services | 2020 |
| Montagnes Holdings Limited | Financial services | 2025 |
| Montford Development Company Limited | Construction | 1993 |
| Monza Installs Ltd | Construction | 2021 |
| Moore Professional Services Ltd | Real estate | 2019 |
| Moore Renovations & Rentals Ltd | Real estate | 2017 |
| Morgan Mechanical Engineering Limited | Professional & scientific | 2022 |
| Morgan Sterling Consultants Limited | Transport & logistics | 2023 |
| Morning Glory Coffee Ltd | Wholesale & retail | 2025 |
| Moscari Limited | Real estate | 2012 |
| Moss Hall Kitchens Ltd | Construction | 2012 |
| Mountain Pasture Properties Ltd | Real estate | 2024 |
| MP UK Hire Ltd | Administrative & support | 2025 |
| MPA Renovations Ltd | Construction | 2019 |
| MPS Construction Supplies Ltd | Wholesale & retail | 2024 |
| MR Duckworth & Co Limited | Wholesale & retail | 2024 |
| MR Sports Limited | Financial services | 2008 |
| MRA Leisure Consultants Ltd | Professional & scientific | 2012 |
| Mrit Properties Ltd | Real estate | 2015 |
| MRS Kellys Home Recipe Products Ltd | Hospitality | 2015 |
| MS Property (North West) Ltd | Real estate | 2025 |
| MSB Family Limited | Real estate | 2021 |
| MSB Foods Limited | Wholesale & retail | 2021 |
| Msheys Ltd | Education | 2026 |
| Mshf Ventures Ltd | Manufacturing | 2025 |
| MTC Motorsport Ltd | Wholesale & retail | 2015 |
| Mullet Conversion Limited | Real estate | 2001 |
| Multyworks Ltd | Construction | 2016 |
| Mumbaiuk.Com Limited | Extraterritorial | 2003 |
| Musto's Barbers (Clitheroe) Ltd | Other services | 2024 |
| My Accountants NW Ltd | Professional & scientific | 2023 |
| My BAD Dog Limited | Wholesale & retail | 2023 |
| My Digi Docs Ltd | Financial services | 2025 |
| Mylah Farm Limited | Agriculture & fishing | 2024 |
| Mytham Atelier Ltd | Wholesale & retail | 2023 |
| N FOX Consultancy Services Ltd | Professional & scientific | 2023 |
| N W Customs Ltd | Wholesale & retail | 2023 |
| N1RL Properties UK Limited | Real estate | 2019 |
| NAH Consulting Ltd | Manufacturing | 2016 |
| NAS Electrical Contractors Ltd | Extraterritorial | 2011 |
| NAT G Projects Ltd | Professional & scientific | 2023 |
| National Association of Professional Sourcing Agents (Napsa) | Other services | 2020 |
| NB Medical Aesthetics Limited | Health & social care | 2019 |
| NB Treeworks Ltd | Construction | 2024 |
| NCI Eco Domestic Cleaning Services Ltd | Administrative & support | 2026 |
| Nectra Technologies Limited | Information & communication | 2025 |
| Needham Hvac Ltd | Construction | 2020 |
| Neil Taylor Contractor Holdings Limited | Financial services | 2018 |
| Neil Taylor Contractors Limited | Construction | 2015 |
| Nester Estates Commercial Ltd | Real estate | 2025 |
| Nester Estates Ltd | Real estate | 2020 |
| Neuro-Dy-Namix Community Interest Company | Education | 2024 |
| New Blackhound Limited | Information & communication | 2025 |
| New EOS Ltd | Professional & scientific | 2024 |
| New ERA Piercing Limited | Other services | 2025 |
| New Inn (Clitheroe) Ltd | Hospitality | 2007 |
| New Life Woodworker C.I.C. | Manufacturing | 2023 |
| New Waggoners Ltd | Hospitality | 2011 |
| Newgrange Design Ltd | Professional & scientific | 2025 |
| Newhey Interiors Ltd | Professional & scientific | 2026 |
| Newlands Nursery Limited | Wholesale & retail | 2019 |
| Newman Textiles Ltd | Financial services | 2011 |
| Next Step Coaching Limited | Hospitality | 2000 |
| Next-Gen Solar UK Limited | Construction | 2020 |
| Ngll (Holdings) Limited | Financial services | 2018 |
| Niche IT Ltd | Administrative & support | 2017 |
| Nick Curtis Construction Ltd | Construction | 2017 |
| Nick Duffy Converting Services Limited | Manufacturing | 2000 |
| Nick Hanson Associates Limited | Financial services | 2007 |
| Nick Shelley Ltd | Professional & scientific | 2013 |
| Nigel Bunyan News and Features Ltd | Information & communication | 2013 |
| Nigel Evans Political Consulting Limited | Professional & scientific | 2024 |
| NJD Performance Coaching Ltd | Arts & recreation | 2015 |
| Nomad Hart Limited | Hospitality | 2025 |
| Nomaduk Limited | Wholesale & retail | 2024 |
| Norkaydie Ltd | Professional & scientific | 2022 |
| North Core Training Limited | Arts & recreation | 2020 |
| North West Automotive Training Solutions Limited | Education | 2022 |
| North West Crystals UK Ltd | Wholesale & retail | 2021 |
| North West Energy Performance Ltd | Professional & scientific | 2026 |
| North West Jewellery School Ltd | Education | 2022 |
| North West Neuropsychology Limited | Health & social care | 2016 |
| North West Physiotherapy Limited | Health & social care | 2013 |
| North Western GAS Safety Services Limited | Construction | 1995 |
| North Yorkshire Render Solutions Limited | Construction | 2010 |