| Market ME China Limited | Information & communication | 2013 |
| Matcharent Ltd | Real estate | 2024 |
| Matthews Johns Associates Ltd | Professional & scientific | 2019 |
| Maverick Ventures UK Ltd | Professional & scientific | 2006 |
| Mechatronic Innovation and Design Ltd | Professional & scientific | 2024 |
| Mellanear Court Limited | Real estate | 2016 |
| Merchant Alliance Limited | Wholesale & retail | 2019 |
| Metal Roofing SW Ltd | Construction | 2024 |
| Michael Clift and Sons Garden Services Limited | Administrative & support | 2005 |
| Mike Nash Limited | Information & communication | 1997 |
| Milieu Studios Limited | Wholesale & retail | 2025 |
| Mill Autoquip Ltd | Wholesale & retail | 2024 |
| MJM Contractors SW Ltd | Construction | 2024 |
| Monger Meteorology Ltd | Professional & scientific | 2024 |
| Monroe Management Cornwall Ltd | Construction | 2020 |
| Morgan Restaurant Ltd | Hospitality | 2019 |
| Motoengineering UK Ltd | Professional & scientific | 2009 |
| Motormachine Ltd | Wholesale & retail | 2022 |
| Moulton Farms Limited | Agriculture & fishing | 2015 |
| Mounts Bay Medical Limited | Health & social care | 2011 |
| MPS Care (Hayle) Limited | Health & social care | 2018 |
| MRB Fishing Limited | Agriculture & fishing | 2026 |
| Mullet Productions Limited | Hospitality | 2025 |
| MW Carpentry SW Ltd | Construction | 2022 |
| My Health PAD CIC | Health & social care | 2020 |
| My Widowed Friends Ltd | Other services | 2025 |
| Mylor Rock Limited | Construction | 2025 |
| Myto Motors Limited | Wholesale & retail | 2019 |
| Naomi Argent Ltd | Arts & recreation | 2019 |
| Natise - 5192 Ltd | Professional & scientific | 2022 |
| Neat Promotions Ltd | Hospitality | 2021 |
| Neighbourhood Botanicals Ltd | Manufacturing | 2016 |
| Nevertire Limited | Financial services | 2025 |
| New Camborne Liberal Hall Limited | Administrative & support | 2016 |
| New Direction Roofing Ltd | Construction | 2024 |
| Ninnis Holdings Ltd | Agriculture & fishing | 2025 |
| Nixon Design EOT Trustee Limited | Professional & scientific | 2022 |
| NO4PENDARVESROAD Ltd | Households | 2020 |
| Noonvares Farm Ltd | Agriculture & fishing | 2023 |
| Norfolk Holiday Homes Ltd | Hospitality | 2015 |
| Novo Electrical Limited | Construction | 2012 |
| NR SES Ltd | Construction | 2014 |
| NSC Building Solutions Group Ltd | Information & communication | 2011 |
| OC Spas Limited | Wholesale & retail | 2015 |
| Ocean Cottages Limited | Hospitality | 2013 |
| Ocean Holidays Cornwall Limited | Hospitality | 2017 |
| OE Window Cleaning Limited | Administrative & support | 2021 |
| Old Mill Stables LLP | | 2014 |
| Onedressed Ltd | Wholesale & retail | 2024 |
| OPF Construction Limited | Construction | 2018 |
| Optical Boutique Limited | Health & social care | 2005 |
| P E Simmons & SON Limited | Agriculture & fishing | 2003 |
| P Hotton Ltd | Information & communication | 2015 |
| Paradise Coach House Limited | Hospitality | 1977 |
| Partsmachine Ltd | Wholesale & retail | 2022 |
| Pasties and Pull-Ups Ltd | Wholesale & retail | 2022 |
| Paul Sherris Funeral Services Ltd | Other services | 2023 |
| Pawsitive Nursing Ltd | Professional & scientific | 2018 |
| Penpol Avenue Management Company Limited | Households | 2019 |
| Pentowan Gardens Management Company Limited | Households | 2005 |
| Penwith Property Limited | Real estate | 2020 |
| Peraval Leisure Limited | Education | 2006 |
| Phoenix Promotions (South West) Limited | Manufacturing | 2006 |
| Phoenix Signs (SW) Ltd | Professional & scientific | 2012 |
| Pigeon Events Ltd | Professional & scientific | 2025 |
| Pillars Properties Limited | Real estate | 2021 |
| Pirate Movie Ltd | Information & communication | 2022 |
| Place House Securities Limited | Real estate | 1970 |
| Platinum Site Services Ltd | Construction | 2015 |
| Pool View Management Company (Hayle) Limited | Real estate | 1988 |
| Portalus Limited | Professional & scientific | 2015 |
| Porthia Mental Health Clinic Limited | Health & social care | 2024 |
| Positive Educational Psychology Solutions Limited | Education | 2023 |
| Pranaclimb Ltd | Arts & recreation | 2025 |
| Prior & Company Insurance Services LLP | | 2004 |
| Progressive Advantage Ltd | Information & communication | 2002 |
| Prospexgeo Limited | Mining & quarrying | 2025 |
| Pure Management Services Ltd | Real estate | 2016 |
| Q Surveying Limited | Professional & scientific | 2017 |
| Queensway House RTM Company Limited | Households | 2014 |
| R B Sails Ltd | Manufacturing | 2011 |
| R C T Cars Limited | Wholesale & retail | 2022 |
| R. Dingle & Sons Ltd | Professional & scientific | 2021 |
| Red Dirt Developments Limited | Construction | 2023 |
| Renovations South West Limited | Construction | 2001 |
| Resilient Orchards Cornwall CIC | Agriculture & fishing | 2021 |
| Revenda Ltd | Wholesale & retail | 2023 |
| Revmax Consulting Limited | Professional & scientific | 2024 |
| Richee Carpentry Ltd. | Construction | 2016 |
| Right on Renovations Limited | Construction | 2025 |
| Rigibore Limited | Manufacturing | 1979 |
| Riviera Farms Limited | Agriculture & fishing | 2018 |
| Riviera Produce Limited | Wholesale & retail | 1997 |
| Riviera Renewables Limited | Energy | 2015 |
| Riviere House Limited | Households | 2019 |
| Robbers Roost Flats (Phillack) Limited | Households | 2007 |
| Robot Systems Limited | Administrative & support | 1989 |
| Rose Mary Contemporary Ltd | Arts & recreation | 2026 |
| Roseland Holiday Cottages Limited | Real estate | 2015 |
| Roseveth Estates Limited | Real estate | 2019 |