| Montagu Town Planning Limited | Professional & scientific | 2015 |
| Mood Haus Ltd | Health & social care | 2026 |
| Moodyfield Ltd | Real estate | 2011 |
| Moonlit Mill Ltd | Wholesale & retail | 2021 |
| Moonraker (Cornwall) Ltd | Wholesale & retail | 2015 |
| Moonraker (World) Ltd | Wholesale & retail | 2015 |
| Moonrakers Mawgan Porth Limited | Real estate | 2014 |
| Moorland Distributions (Cornwall) Ltd | Wholesale & retail | 2021 |
| Moorse and Moorse Limited | Wholesale & retail | 2004 |
| MOR + Broze Limited | Wholesale & retail | 2024 |
| MOR Collective Ltd | Professional & scientific | 2021 |
| MOR Search Ltd | Administrative & support | 2024 |
| Mordardha Limited | Arts & recreation | 2023 |
| Mordon Geophysical Ltd | Professional & scientific | 2023 |
| Mordros Consulting Ltd | Administrative & support | 2025 |
| Mordros Studios Ltd | Professional & scientific | 2026 |
| Morning Point Limited | Real estate | 2018 |
| Morret Court Management Company Limited | Real estate | 1986 |
| Morrison Electrical Limited | Construction | 2015 |
| Morton Neuropsychology Limited | Health & social care | 2022 |
| Mothersurf Fusion Ltd | Wholesale & retail | 2026 |
| Mothersurf Ltd | Wholesale & retail | 2024 |
| Moukded Gents Hairdressers Ltd | Other services | 2023 |
| Mount Wise Flats Limited | Real estate | 1997 |
| Mountwise Ltd | Hospitality | 2019 |
| Mourbuild Limited | Construction | 2012 |
| Moxie Nova Ltd | Health & social care | 2025 |
| MPM Bathroom Installations Cornwall Ltd | Construction | 2021 |
| MRC Property Services Ltd | Administrative & support | 2024 |
| Mube Limited | Information & communication | 2015 |
| Mulberry Corner Nursery LLP | | 2015 |
| Mullion Films Ltd | Information & communication | 2025 |
| Munro Investments Limited | Real estate | 2020 |
| Mustard Surf Limited | Wholesale & retail | 2018 |
| MW Carpentry Services (Cornwall) Limited | Construction | 2010 |
| My Local Experts Ltd | Administrative & support | 2014 |
| Mylor Woodlands Management Company Limited | Real estate | 2025 |
| MYU Ltd | Administrative & support | 2021 |
| N a J Johnson Ltd | Professional & scientific | 2015 |
| N C & Leisure Ltd | Wholesale & retail | 2021 |
| N J M Carpentry Ltd | Construction | 2019 |
| Nadia Majidi Limited | Health & social care | 2021 |
| Naked Property Limited | Real estate | 2024 |
| Naked Solar Ltd. | Construction | 2011 |
| Nalu Coffee House Ltd | Hospitality | 2021 |
| Nanpean Properties Limited | Households | 2006 |
| Nansalsa Residents Association Limited | Households | 1973 |
| Nansledan Community Association CIC | Education | 2024 |
| Naps and Snacks Ltd | Information & communication | 2020 |
| Natalie DOW Limited | Professional & scientific | 2012 |
| National Fryers Ltd | Hospitality | 2025 |
| Nauplius Limited | Professional & scientific | 2025 |
| NE Legacy Estates Limited | Real estate | 2024 |
| Need an Adviser Limited | Professional & scientific | 2001 |
| Needneutral Limited | Real estate | 1986 |
| Neon Wetsuits Ltd | Manufacturing | 2013 |
| Neos Consulting Limited | Wholesale & retail | 2021 |
| NET Zero Living Ltd | Construction | 2020 |
| Never Miss a Call Ltd | Extraterritorial | 2020 |
| New Heights Construction and Development Ltd | Construction | 2023 |
| New Wave Builders (SW) Limited | Manufacturing | 2026 |
| Newquay Accountants Ltd | Professional & scientific | 2014 |
| Newquay Activity Centre Ltd | Administrative & support | 2011 |
| Newquay Attractions Ltd | Arts & recreation | 2022 |
| Newquay Auto Club Limited | Arts & recreation | 1974 |
| Newquay BID Limited | Administrative & support | 2011 |
| Newquay Building Services Ltd | Construction | 2020 |
| Newquay Chiropractic Clinic Ltd | Health & social care | 2003 |
| Newquay Chiropractic Limited | Health & social care | 2015 |
| Newquay Coastal Holiday Lets Limited | Hospitality | 2016 |
| Newquay Decorating & Property Care Ltd | Construction | 2024 |
| Newquay Dental Centre Ltd | Health & social care | 2008 |
| Newquay Dental Holdings Ltd | Financial services | 2026 |
| Newquay Earthworks Ltd | Administrative & support | 2026 |
| Newquay Entertainment Ltd | Arts & recreation | 2012 |
| Newquay Fire Ltd | Public administration | 2017 |
| Newquay Fire Protection Ltd | Public administration | 2018 |
| Newquay Fruit Sales Limited | Real estate | 1995 |
| Newquay Garden Centre Limited | Wholesale & retail | 1989 |
| Newquay Hand Car Wash Ltd | Other services | 2025 |
| Newquay Holiday Lettings Ltd | Hospitality | 2012 |
| Newquay Holiday Rentals Ltd | Hospitality | 2011 |
| Newquay Homes Limited | Construction | 2023 |
| Newquay Hornets Ltd | Arts & recreation | 2025 |
| Newquay Hornets Nest Ltd | Hospitality | 2025 |
| Newquay Limited | Construction | 2024 |
| Newquay Linen Limited | Other services | 2018 |
| Newquay Mortgage and Pensions Limited | Financial services | 2006 |
| Newquay Osteopaths Ltd | Health & social care | 2006 |
| Newquay Outdoor Education Centre Ltd | Education | 2022 |
| Newquay Owns Property C.I.C. | Other services | 2023 |
| Newquay Self Drive Ltd | Administrative & support | 2020 |
| Newquay Surf Lessons Ltd | Education | 2025 |
| Newquay Veterans Community Interest Company | Administrative & support | 2021 |
| Newquay Wellbeing Club CIC | Health & social care | 2024 |
| Newquay Wild Activities CIC | Professional & scientific | 2021 |
| Newquay Wills and Estates Ltd | Financial services | 2026 |
| Next Level Surf Limited | Wholesale & retail | 2024 |
| Next Level YOU Ltd | Health & social care | 2026 |
| Nextgen Wellness Ltd | Wholesale & retail | 2026 |