| Newlyn Solar Ltd | Energy | 2023 |
| Newquay Food Festival Ltd | Hospitality | 2024 |
| News and Coffee UK Ltd | Wholesale & retail | 2022 |
| Nexogen Ltd | Financial services | 2024 |
| NIC Danning Limited | Manufacturing | 2022 |
| Nicholas Winchester Limited | Information & communication | 2020 |
| Nicholson Interiors Ltd | Professional & scientific | 2019 |
| Nina Khaira Ltd | Real estate | 2022 |
| Nite-Life Light & Sound Limited | Wholesale & retail | 1996 |
| NNT Holdings Limited | Real estate | 2023 |
| Nora Thai Limited | Hospitality | 2025 |
| Norfolk Interior Specialists Limited | Manufacturing | 2020 |
| Norsap Holdings UK Ltd | Wholesale & retail | 2026 |
| Norsap UK Limited | Wholesale & retail | 2018 |
| Norton Systems Ltd | Professional & scientific | 2024 |
| NOT Quite Right Ltd | Extraterritorial | 2024 |
| Notpage Limited | Real estate | 1981 |
| Number 8 Hairdressing Limited | Other services | 2003 |
| Number Thirty-Seven Ltd | Other services | 2017 |
| Nursefinders Limited | Administrative & support | 1998 |
| NV Hairdressing Limited | Other services | 2004 |
| Oak Green Property Limited | Real estate | 2021 |
| Oakfield Hospitality Limited | Financial services | 2012 |
| Oakland Bamboo Limited | Hospitality | 2020 |
| Ocboiler Ltd | Manufacturing | 2022 |
| Ocean Buffer Project CIC | Agriculture & fishing | 2025 |
| Ocean Diamonds Limited | Mining & quarrying | 2004 |
| Ocean Pride Fishing Limited | Agriculture & fishing | 2013 |
| Ocean Technical Safety Services Ltd | Construction | 2024 |
| Oceanwave Limited | Professional & scientific | 2004 |
| Octane Run Ltd | Administrative & support | 2016 |
| OFF the Wall Aerial Dance Circus CIC | Arts & recreation | 2019 |
| OH SO Social Limited | Professional & scientific | 2017 |
| Oilfield Water Consultants Limited | Professional & scientific | 2021 |
| Old Station RD Goonbell Management Limited | Households | 2026 |
| Olive MAY Group Limited | Information & communication | 2015 |
| Oliver Dumas Associates Limited | Professional & scientific | 2014 |
| Oliver Garrod Cardiology Ltd | Professional & scientific | 2018 |
| Oliver Hall Design Limited | Professional & scientific | 2019 |
| Oliver's the Eatery Limited | Extraterritorial | 2010 |
| OM Civic Intelligence Network Ltd | Information & communication | 2026 |
| Ondine ASH Limited | Wholesale & retail | 2016 |
| One Blue EYE Ltd | Manufacturing | 2023 |
| One Gyllyngvase Road Limited | Administrative & support | 2013 |
| ORA Viviamo Ltd | Manufacturing | 2025 |
| Orbituk Ltd | Information & communication | 2020 |
| Other Oils Fuelling Change CIC | Wholesale & retail | 2020 |
| Otte Art Ltd | Wholesale & retail | 2026 |
| Ottervale Properties Limited | Professional & scientific | 1988 |
| OUT There Ltd | Financial services | 1995 |
| OWL & Bear Ltd | Professional & scientific | 2017 |
| P & I Associates Ltd | Administrative & support | 2003 |
| P&P Watson Holdings Ltd | Real estate | 2026 |
| P.G Lakin Ltd | Construction | 2001 |
| P.R. Laffin Fabrications Limited | Manufacturing | 2003 |
| Pace Smiles Ltd | Financial services | 2026 |
| Packshare Ltd | Water & waste | 2018 |
| Pactt Limited | Health & social care | 2010 |
| Paddle Logger Limited | Arts & recreation | 2018 |
| Padstow Candle Co Ltd | Wholesale & retail | 2020 |
| Padstow Heating Limited | Construction | 2001 |
| Padstow Plumbing & Heating Limited | Extraterritorial | 2020 |
| Paipo Glide Ltd | Information & communication | 2008 |
| Panchi Ice Ltd | Hospitality | 2021 |
| Pangeotek Limited | Construction | 2019 |
| Paniz Global Trading Ltd | Wholesale & retail | 2024 |
| Panther AJ Limited | Real estate | 2020 |
| Pantiles Management Company (Falmouth) Limited | Households | 2008 |
| Paola Forsberg Consulting Ltd | Professional & scientific | 2018 |
| Papatjes Limited | Hospitality | 2026 |
| Parade Cornwall Limited | Wholesale & retail | 2025 |
| Pardoe & Co Ltd | Financial services | 2026 |
| Parens Holdings Ltd | Financial services | 2023 |
| Park Gwenton Management Company Limited | Households | 2021 |
| Parkes & Pearn (SW) Ltd | Real estate | 2013 |
| Parks Electrical Ltd | Construction | 2019 |
| Passing Place Ltd | Administrative & support | 2023 |
| Passmore Cleaning Limited | Administrative & support | 2017 |
| Patwin Properties Limited | Real estate | 2014 |
| Paul Kerridge Marine Surveyors & Consultants Limited | Transport & logistics | 2008 |
| PC Solve and Install Limited | Information & communication | 2008 |
| Peak Seismic Solutions Limited | Professional & scientific | 2012 |
| Peaky Digital Ltd | Professional & scientific | 2016 |
| Peelback Ltd | Information & communication | 2025 |
| Peep Film Ltd | Information & communication | 2013 |
| Peisley Limited | Health & social care | 2008 |
| Pelagic Design Limited | Professional & scientific | 2011 |
| Pelican Properties Limited | Real estate | 1987 |
| PEN & POL Limited | Manufacturing | 2024 |
| Penarrow Limited | Professional & scientific | 2018 |
| Pendennis Brokerage Limited | Extraterritorial | 2011 |
| Pendennis Plus Limited | Manufacturing | 2009 |
| Pendennis Superyachts Limited | Extraterritorial | 2011 |
| Pendra Loweth Leaseholders Limited | Households | 2017 |
| Pendra Loweth Leaseholders Management Limited | Households | 2017 |
| Penhellick Ltd | Health & social care | 2021 |
| Peninsula Podiatry Limited | Health & social care | 2012 |
| Penmayn Limited | Financial services | 2019 |
| Penmere Drive Residents Ltd | Households | 2024 |
| Pennance Ltd | Financial services | 2021 |