| Neil Cave & Co (2018) LLP | | 2018 |
| Neil Roberts Plumbing & Heating Ltd | Construction | 2017 |
| Neon Nightclub Ltd | Arts & recreation | 2023 |
| Neurohappiness Community Interest Company | Education | 2022 |
| Neurology Academy Limited | Professional & scientific | 1998 |
| New Claret LLP | | 2006 |
| Newman Marine Services Limited | Professional & scientific | 2017 |
| Newquay Estates Limited | Real estate | 2026 |
| Newquay Indoor Bowling Club Limited | Arts & recreation | 1974 |
| Newquay Lodge Hotel (Holdings) Limited | Hospitality | 2010 |
| Next GEN Heating Solutions South West Ltd | Construction | 2025 |
| Next Level Lifts Ltd | Manufacturing | 2021 |
| Nicholls Group Ltd | Financial services | 2024 |
| Nicholls Plumbing & Heating Ltd | Construction | 2011 |
| Ninnis Farm Management Limited | Agriculture & fishing | 2008 |
| Nixon & Penellum Property Ventures Limited | Professional & scientific | 2025 |
| Nixon Management Co Ltd | Hospitality | 2025 |
| NO.4 Breakfast and Bistro Ltd | Hospitality | 2020 |
| Nomad Coder Limited | Information & communication | 2010 |
| Northshore Mechanical Ltd | Construction | 2025 |
| Northwest Domestic Properties Ltd | Real estate | 2000 |
| Nova Falls Limited | Information & communication | 2015 |
| NQY Ltd. | Hospitality | 2016 |
| NQY Surf School Limited | Arts & recreation | 2016 |
| NR Developments Cornwall Limited | Construction | 2025 |
| NT Water Services LLP | | 2016 |
| NU Car Wash Ltd | Administrative & support | 2017 |
| Nullis Group Ltd | Real estate | 2025 |
| Numbers Accountancy Services Ltd | Professional & scientific | 2010 |
| O.K.W Rendering Ltd | Construction | 2019 |
| Obsessiveoverload Ltd | Wholesale & retail | 2025 |
| Ocean & Country Limited | Real estate | 2015 |
| Ocean Covers Limited | Manufacturing | 2006 |
| Ocean Fish (Retail) Limited | Manufacturing | 1986 |
| Ocean Fish (Wholesale) Limited | Agriculture & fishing | 1980 |
| Ocean Holdings South West Ltd | Agriculture & fishing | 2018 |
| Ocean Housing Group Limited | Professional & scientific | 2003 |
| Ocean Magic Shaping Ltd | Wholesale & retail | 2020 |
| Ocean Minerals (SW) Ltd | Mining & quarrying | 2015 |
| Off-Grid Living Ltd | Wholesale & retail | 2020 |
| OGY1 SW Limited | Manufacturing | 2024 |
| Old Town Cove Ltd | Agriculture & fishing | 2025 |
| Olde World Inns Holdings Ltd | Financial services | 2019 |
| Olde World Inns Limited | Hospitality | 1963 |
| Oldwell Cornwall Ltd | Arts & recreation | 2019 |
| Opie Moto Limited | Wholesale & retail | 2026 |
| OQD Creative Ltd | Information & communication | 2025 |
| Orange Spiral Limited | Wholesale & retail | 2017 |
| Orbis One AI Ltd | Information & communication | 2025 |
| Orchard Electrical SW Ltd | Construction | 2020 |
| Orlbie Limited | Professional & scientific | 2023 |
| Osmose Studio Ltd | Professional & scientific | 2020 |
| Ouch Professional Body Piercing UK Limited | Wholesale & retail | 2001 |
| Ovar and Ovar Limited | Professional & scientific | 2019 |
| OWR Group Ltd | Wholesale & retail | 2025 |
| P L Carpentry Ltd | Construction | 2022 |
| P.J.I. Security Limited | Administrative & support | 1995 |
| Padstow Laundry Limited | Other services | 2010 |
| Palm Cleans Cornwall Ltd | Administrative & support | 2024 |
| Palores Productions Limited | Arts & recreation | 2015 |
| Pardoe Capital Ltd | Financial services | 2019 |
| Parent Carer Council Cornwall Community Interest Company | Information & communication | 2012 |
| Parkside Garage (Cornwall) Ltd | Wholesale & retail | 2020 |
| Partech (Electronics) Limited | Manufacturing | 1964 |
| Pasty BOY Pictures Ltd | Information & communication | 2025 |
| Pat's Film Club Ltd | Information & communication | 2022 |
| Paul Catchpole Limited | Arts & recreation | 1990 |
| Pearson Power Services Ltd | Energy | 2018 |
| Pedley Productions Limited | Professional & scientific | 2012 |
| Pendennis Food Hygiene Limited | Professional & scientific | 2022 |
| Pendragon Builders Limited | Construction | 2018 |
| Penhall Homes Ltd | Construction | 2019 |
| Pentewan Valley WET Nursery Ltd | Wholesale & retail | 2024 |
| Pentire Fishing Limited | Agriculture & fishing | 2020 |
| Penzance DRY Dock (2009) Limited | Manufacturing | 2009 |
| People 2000 Limited | Financial services | 1972 |
| Perennial Harvest Ltd | Agriculture & fishing | 2014 |
| Perfectly Balanced Paws Ltd | Manufacturing | 2024 |
| Performance Health AI Ltd | Health & social care | 2025 |
| Performance Health UK Holdings Limited | Financial services | 2026 |
| Perranporth Airfield Limited | Transport & logistics | 1998 |
| Perranporth Driving Centre Ltd | Education | 2018 |
| Pet Portraits by Jade Ltd | Arts & recreation | 2025 |
| Peter Beavis Photography Limited | Professional & scientific | 2014 |
| PH Media Limited | Information & communication | 2004 |
| Phillips Frith LLP | | 2009 |
| Phoenix Stores South West Ltd | Wholesale & retail | 2019 |
| Pick It,Mix It,Love IT Ltd | Wholesale & retail | 2026 |
| Pimpernels Business Services Ltd | Professional & scientific | 2020 |
| Pine Lodge Cornwall Limited | Real estate | 2026 |
| Pinetum 19 Limited | Other services | 2019 |
| Pinnacle Civil Construction Ltd | Construction | 2018 |
| Pinpoint SW Ltd | Manufacturing | 2024 |
| Pirajeeth Retail Limited | Wholesale & retail | 2020 |
| PL24 Ltd | Real estate | 2019 |
| PL26 Holdings Limited | Wholesale & retail | 2020 |
| PL26 Industries Ltd | Wholesale & retail | 2017 |
| Pleb Ltd | Information & communication | 2025 |
| Plye Limited | Hospitality | 2022 |
| Pochin House Management Company Limited | Real estate | 2003 |