| Penzance Self-Storage Limited | Real estate | 2017 |
| Pesco Limited | Energy | 2016 |
| Pestakil South West Limited | Administrative & support | 2015 |
| Peter Anthony Newby Limited | Extraterritorial | 2025 |
| Peters-Fox Limited | Professional & scientific | 2011 |
| Pgmachina Ltd | Manufacturing | 2026 |
| Philden Developments Limited | Construction | 2024 |
| Philip Hodges Limited | Construction | 2016 |
| Phoenix Care Cornwall Limited | Health & social care | 2005 |
| Phoenix Corporate Gifts Limited | Wholesale & retail | 2011 |
| Picture Penzance CIC | Information & communication | 2026 |
| Pierce Ionides Ltd | Health & social care | 2020 |
| Pilchard Works Flats Limited | Households | 2022 |
| Pink Cactus Cafe Limited | Hospitality | 2025 |
| Pioneer Wealth Management Ltd | Financial services | 2011 |
| Piran Plumbing Ltd | Construction | 2020 |
| Pirate Carbon Services Limited | Manufacturing | 2025 |
| Piscator Technologies Ltd | Information & communication | 2020 |
| Pizza Roja Ltd. | Hospitality | 2025 |
| PKJ Properties Holdings Limited | Financial services | 2015 |
| PKJ Properties Limited | Real estate | 2015 |
| PKR Carpentry Limited | Construction | 2011 |
| Place Group Limited | Public administration | 2002 |
| Playasol Ltd | Extraterritorial | 1988 |
| Playground Called Earth Ltd | Health & social care | 2025 |
| Plug Into the Sun Limited | Energy | 2007 |
| Plumbe ST Property Limited | Real estate | 2015 |
| Plymouth Otology Limited | Health & social care | 2024 |
| PNZ Developments Ltd | Real estate | 2025 |
| Pocketful of Stones Distillers Limited | Manufacturing | 2016 |
| Polaflex Media Limited | Professional & scientific | 2019 |
| Polgoon Vineyard Ltd | Manufacturing | 2018 |
| Polmor Freehold Ltd | Extraterritorial | 2025 |
| Poltreen Consulting Ltd | Professional & scientific | 2014 |
| Polyblank Property Ltd | Real estate | 2025 |
| POP XR Ltd | Information & communication | 2023 |
| Poppy Treffry Limited | Manufacturing | 2006 |
| Poppy's Pineapples Ltd | Hospitality | 2024 |
| Portersbridge Mews Management Limited | Households | 2018 |
| Porth Enys Marine Services Ltd | Agriculture & fishing | 2023 |
| Porth Holidays Ltd | Real estate | 2020 |
| Porthcurno Enterprises Limited | Hospitality | 2000 |
| Porthia Management Company Limited | Households | 2014 |
| PR5 Limited | Construction | 2016 |
| Practice Efficiency Limited | Professional & scientific | 2001 |
| Praze Ltd | Information & communication | 2018 |
| Precium Ltd | Information & communication | 2011 |
| Presentations by Design Ltd | Professional & scientific | 2018 |
| PRH Lettings Limited | Real estate | 2008 |
| Primary Care Education Limited | Education | 2015 |
| Primary Tutor Project Ltd | Education | 2023 |
| Prime Build SW Ltd | Construction | 2023 |
| Primitive Vision Studios Ltd | Manufacturing | 2024 |
| Prince of Wales Terrace Management Company Limited | Real estate | 2012 |
| Princes Community Hall Limited | Real estate | 2026 |
| Princess MAY Recreation CIC | Administrative & support | 2022 |
| Priory Lane Trading Limited | Transport & logistics | 2018 |
| Pro-Scale Limited | Manufacturing | 1980 |
| Progo (Cornwall) Limited | Manufacturing | 2023 |
| Prom Food Hub Ltd | Hospitality | 2026 |
| Promote Penzance Positively CIC | Information & communication | 2026 |
| Propel People Development Limited | Other services | 2018 |
| Propertybugaccounting Ltd | Professional & scientific | 2026 |
| Prostate Matters Ltd | Professional & scientific | 2005 |
| Protexer Consulting Limited | Professional & scientific | 2024 |
| PRP Property Developers Limited | Construction | 2016 |
| Prussia Stone Limited | Construction | 2019 |
| PS Holiday Lettings Ltd | Hospitality | 2023 |
| PSW Build Ltd | Real estate | 2025 |
| PT & G Limited | Hospitality | 2017 |
| PT Auto Repairs Limited | Wholesale & retail | 2003 |
| PTW Inns Ltd. | Hospitality | 2024 |
| Pure Build Construction Limited | Construction | 2012 |
| Pure Grappling LLP | | 2024 |
| Pure Mint Recordings Ltd | Information & communication | 2003 |
| Pure Nuff Stuff Limited | Wholesale & retail | 2006 |
| Purvida Ltd | Arts & recreation | 2020 |
| PWH Design Ltd | Professional & scientific | 2021 |
| PZ Bistros Ltd | Hospitality | 2022 |
| PZ Conservation C.I.C. | Arts & recreation | 2010 |
| PZ Productions Limited | Information & communication | 2019 |
| PZ Scaffolding Limited | Construction | 2015 |
| PZ Turkish Barbers Ltd | Other services | 2025 |
| PZN Youth CIC | Health & social care | 2022 |
| Pztaproom Ltd | Hospitality | 2025 |
| Q RX Limited | Health & social care | 2012 |
| Quay House (Hayle) Management Company Limited | Real estate | 2018 |
| Queen Street Trading Limited | Real estate | 2013 |
| Queen's Taverns (Penzance) Limited | Hospitality | 1964 |
| Quickstep Communications Limited | Professional & scientific | 2003 |
| R & K Swain Limited | Construction | 2007 |
| R W Abbott & Associates Limited | Professional & scientific | 2003 |
| R W Crago Limited | Transport & logistics | 2013 |
| R Windhaber Limited | Health & social care | 2019 |
| R&R Developers Ltd | Construction | 2023 |
| R.M. Motor Services Limited | Wholesale & retail | 1995 |
| Raina Jordan Ltd | Wholesale & retail | 2025 |
| Raising Humans Kind Ltd | Wholesale & retail | 2023 |
| Rani's Kitchen Ltd | Hospitality | 2024 |
| Raptor Design Ltd | Professional & scientific | 2017 |