| Nicola Casperson Limited | Real estate | 2017 |
| Night Night Stop Ltd | Hospitality | 2026 |
| Nixsa Wetsuits Ltd | Arts & recreation | 2018 |
| Noah Neurotech Ltd | Manufacturing | 2026 |
| Normandy Propco Limited | Financial services | 2026 |
| North Coast Bricklaying Limited | Construction | 2018 |
| North Coast LOG Cabins Holdings Limited | Financial services | 2016 |
| North Cornwall Broadcasting CIC | Information & communication | 2012 |
| North Cornwall Motors Ltd | Wholesale & retail | 2025 |
| NOT a Gym CIC | Other services | 2023 |
| Nottle Construction Limited | Construction | 2022 |
| Nottle Holdings Limited | Financial services | 2026 |
| Nowa Renovations Ltd | Construction | 2025 |
| NSK Motorcycles Ltd | Administrative & support | 2019 |
| O P Plumbing and Heating Ltd | Construction | 2019 |
| Oakway Limited | Construction | 1992 |
| Oakwood Management (Church Street) Limited | Households | 2009 |
| Oban Limited | Manufacturing | 1998 |
| Odyssey Innovation Ltd | Manufacturing | 2018 |
| Old Hill Bike Park Limited | Arts & recreation | 2019 |
| ON Parole Ltd | Other services | 2022 |
| One and ALL American Football Academy CIC | Education | 2019 |
| Orchard Dean Developments (an Kelyn) Ltd. | Construction | 2021 |
| Orchard Dean Developments (Penhalls) Ltd | Construction | 2021 |
| Orchard Dean Developments (Tall Trees) Ltd | Construction | 2021 |
| Orchard Dean Developments (Windmill Hill) Ltd | Construction | 2021 |
| Orchard Dean Developments Ltd | Construction | 2019 |
| Osborne Catering Supplies Limited | Wholesale & retail | 1999 |
| Outback Developments Limited | Construction | 2006 |
| Outcity Limited | Real estate | 2000 |
| Outside Interiors Limited | | 1988 |
| P&S Harris Limited | Agriculture & fishing | 2008 |
| P&T Holdings Ltd | Real estate | 2019 |
| Pablo Community Ltd | Manufacturing | 2026 |
| Palace Dinner Limited | Hospitality | 2021 |
| Palmerston COURT(SURBITON)NO.1.RESIDENTS Association Limited | Real estate | 1968 |
| Paperboat Insight Ltd | Professional & scientific | 2011 |
| Parker Confectionery Limited | Manufacturing | 2018 |
| Parker Intellectual Property Limited | Professional & scientific | 2017 |
| Parnells Taxis Limited | Transport & logistics | 2012 |
| Paul Miles Rogers Limited | Extraterritorial | 2012 |
| Paye Solutions (SW) Ltd | Professional & scientific | 2026 |
| Pcfg Limited | Agriculture & fishing | 2003 |
| Pcottom Ltd | Professional & scientific | 2023 |
| Pebble Court Management Company Limited | Households | 2002 |
| Pencarrow Events LLP | | 2016 |
| Pendleton Global Ltd | Wholesale & retail | 2009 |
| Pengenna Manor Limited | Other services | 2021 |
| Penina Property Management (East) Limited | Real estate | 2023 |
| Penina Property Management (North) Limited | Real estate | 2015 |
| Penina Property Management (South) Limited | Real estate | 2015 |
| Penina Property Management (West) Limited | Real estate | 2022 |
| Penina Property Management Group Ltd | Professional & scientific | 2018 |
| Penina Property Management Limited | Real estate | 2023 |
| Peninsula Water Hygiene Ltd | Professional & scientific | 2016 |
| Penlee (Fowey) Management Company Limited | Households | 1992 |
| Pennance Barns Management Company Limited | Households | 2015 |
| Penryn Harbour Management Limited | Households | 1998 |
| Pentowan House Apartments Limited | Households | 2005 |
| Pentruse Developments Limited | Energy | 2015 |
| Penvale Management Company Limited | Households | 1978 |
| Penwine Farms Limited | Agriculture & fishing | 2011 |
| Penwine Ltd | Professional & scientific | 2021 |
| Perring Properties Limited | Construction | 2002 |
| Pestkil Southwest Ltd | Other services | 2011 |
| Pete Lethbridge Stainless Steel Ltd | Manufacturing | 2017 |
| PFA Research Limited | Professional & scientific | 1991 |
| Phuongthaovietanh Ltd | Other services | 2023 |
| Pineapple PS Limited | Construction | 2024 |
| Pink Lemons Limited | Wholesale & retail | 2007 |
| Pitched Applications Limited | Information & communication | 2017 |
| Pitched Booking Limited | Information & communication | 2004 |
| Pitched Holdings Limited | Financial services | 2023 |
| PK Investments (Cornwall) Limited | Real estate | 2009 |
| Plant Maintenance & Repairs Ltd | Manufacturing | 2013 |
| Players Plumbing Ltd | Construction | 2024 |
| Plumbing by Design Ltd | Construction | 2023 |
| Plymouth Divers Limited | Manufacturing | 2000 |
| PNC Management Ltd | Households | 2011 |
| Poco Loco (Cornwall) Ltd | Hospitality | 2021 |
| Polmark Beach Cottages Owners Ltd | Households | 2016 |
| Poltisco Wharf Management Company Limited | Households | 2000 |
| Polyrhythm CIC | Health & social care | 2021 |
| Polzeath Beach House Ltd | Hospitality | 2020 |
| Porth LYS Limited | Construction | 2013 |
| Portuguese Taste Ltd | Hospitality | 2015 |
| Portuguese Tavern Ltd | Hospitality | 2022 |
| Pragmatic Resource Ltd | Other services | 2019 |
| Precision Grazing Ltd | Professional & scientific | 2016 |
| Premier Storage Products Limited | Construction | 1999 |
| Primetech (UK) Limited | Information & communication | 1998 |
| Priory House (Bodmin) Management Company Limited | Households | 2021 |
| Professional Dog Training Services Limited | Extraterritorial | 2014 |
| Progress Engineering Limited | Professional & scientific | 2009 |
| Progressive Farming Company Ltd | Agriculture & fishing | 2019 |
| Progym Bodmin Ltd | Arts & recreation | 2026 |
| Project and Finish Ltd | Construction | 2026 |
| Pronail and Beauty Academy Ltd | Education | 2025 |
| Proper Cornish Holdings Limited | Financial services | 2021 |
| Proper Cornish Limited | Manufacturing | 1999 |