| Pender Law Limited | Professional & scientific | 2011 |
| Pendowr Management Company Limited | Households | 2006 |
| Peneglos Management Company Limited | Households | 1987 |
| Penelewey Barns Management Ltd | Real estate | 2021 |
| Penelewey Properties Limited | Hospitality | 2012 |
| Penelewey Storage Ltd | Other services | 2008 |
| Pengelly Estates Limited | Real estate | 1997 |
| Pengelly Way Management Company Limited | Households | 2016 |
| Pengelly Weddings Limited | Other services | 2021 |
| Pengenna Pasties Limited | Manufacturing | 2006 |
| Pengwarras Homes Limited | Real estate | 2021 |
| Penhaligon Court Residents Company Limited | Households | 1997 |
| Penhallow Farm Limited | Agriculture & fishing | 1997 |
| Penhallow Lodge Ltd | Hospitality | 2013 |
| Penhellis Community Care Limited | Other services | 1994 |
| Penhill Properties Limited | Real estate | 2025 |
| Peninsula Housing Limited | Real estate | 2018 |
| Peninsula Medical Technologies Ltd | Manufacturing | 2018 |
| Peninsula Ultrasound Limited | Extraterritorial | 2022 |
| Penmarin House Management Ltd | Real estate | 2023 |
| Penmere Court (Falmouth) Management Company Limited | Hospitality | 1975 |
| Penmorvah Property Group Ltd | Real estate | 2025 |
| Pennance Field Management Company Limited | Households | 2015 |
| Penny Paddle Corporate Law Ltd | Professional & scientific | 2024 |
| Penny's Laundry Service Limited | Other services | 2014 |
| Penrose (Cornwall) Limited | Real estate | 1999 |
| Penrose Paddocks Ltd | Hospitality | 2025 |
| Penryn Maritime Ltd | Transport & logistics | 2023 |
| Penryn Properties Ltd | Real estate | 2018 |
| Penstraze Sawmills Ltd | Wholesale & retail | 2021 |
| Pentire Management Limited | Real estate | 2012 |
| Pentle Bay Properties Limited | Real estate | 2024 |
| Pentor Green Management Company Limited | Households | 1998 |
| Pentreath Music Ltd | Extraterritorial | 2010 |
| Penty Myghal Ltd | Real estate | 2012 |
| Penwerris Court Management Company Limited | Households | 2009 |
| Penwerris Flats Management Company Limited | Households | 2016 |
| Penzance Heliport Limited | Transport & logistics | 2012 |
| People Pilot Ltd | Information & communication | 2025 |
| People Power Science Community Interest Company | Professional & scientific | 2018 |
| Pepinia Ltd | Financial services | 2019 |
| Pepper's Pizza (Falmouth) Limited | Hospitality | 2024 |
| Percuil River Moorings Limited | Real estate | 1989 |
| Peregrine Veterinary Centres Ltd | Professional & scientific | 2005 |
| Perfect Balance Ltd | Professional & scientific | 2016 |
| Perfect Events Group LLP | | 2015 |
| Perran Baits Ltd | Wholesale & retail | 2022 |
| Perran Home Care Limited | Health & social care | 2022 |
| Perran Housing LLP | | 2020 |
| Perran Merch Ltd | Wholesale & retail | 2026 |
| Perranwell Station Development Management Company Limited | Households | 2019 |
| Perryco Ltd | Health & social care | 2023 |
| Perryman Holdings Limited | Financial services | 2017 |
| Perryman Housing & Development Limited | Real estate | 2016 |
| Perryman Leisure Cornwall Ltd | Construction | 2022 |
| Perryman Properties Cornwall Limited | Real estate | 2021 |
| Pet 24-7 Global Ltd | Information & communication | 2023 |
| Pete Yates Consulting Ltd | Professional & scientific | 2026 |
| Peter Blincow Limited | Professional & scientific | 2016 |
| Peter Child Associates Ltd | Professional & scientific | 2015 |
| Peter George Transport Limited | Transport & logistics | 2020 |
| Peter Hawkey Limited | Agriculture & fishing | 2015 |
| Peter Lundie Limited | Real estate | 1986 |
| Peterco Limited | Real estate | 2013 |
| Petpalai Limited | Information & communication | 2025 |
| Petty Fours Restaurant Group Ltd | Hospitality | 2023 |
| Petwell Management Company Limited | Households | 1984 |
| Phalo Limited | Professional & scientific | 2018 |
| Pharma Engineering Resolutions Limited | Professional & scientific | 2010 |
| Pharmonyze Limited | Professional & scientific | 2012 |
| PHD (C ENG) Consulting Limited | Construction | 2014 |
| Phil Green Plant Hire Limited | Construction | 2014 |
| Phil Neville Ltd | Professional & scientific | 2008 |
| Philanthropub Ltd | Hospitality | 2021 |
| Philema Hospitality Management Limited | Administrative & support | 2016 |
| Philip Annear Windows Ltd | Construction | 2017 |
| Philip Martin Lettings Limited | Real estate | 2017 |
| Philleigh Way LLP | | 2016 |
| Phillips Property Group Ltd | Real estate | 2025 |
| Philp's Bakery Holdings Limited | Manufacturing | 2023 |
| Philp's Bakery Limited | Manufacturing | 2017 |
| Phoenix Financial Services Limited | Financial services | 1999 |
| Phoenix Hruk Ltd | Administrative & support | 2025 |
| Phoenix Insurance Consultants Limited | Financial services | 2003 |
| Phone-Tech Cornwall Limited | Wholesale & retail | 2019 |
| Photo Distribution Holdings Limited | Financial services | 2021 |
| Photo Distribution Ltd | Professional & scientific | 2002 |
| Photograph London Ltd | Professional & scientific | 2025 |
| Physiolates Limited | Health & social care | 2017 |
| Piero Marci Limited | Households | 1997 |
| Piero's Ristorante & Pizzeria Limited | Hospitality | 2000 |
| Pilgrim Holdings | Financial services | 1983 |
| Pilton Investments Limited | Extraterritorial | 2015 |
| Pinewood Polzeath Residents Management Company Limited | Households | 2012 |
| Pinhoe Project EX1 Ltd | Construction | 2024 |
| Pinhoe Project Limited | Construction | 2018 |
| Pink Pebble Consulting Limited | Professional & scientific | 2021 |
| Pinnie House Group Ltd | Arts & recreation | 2022 |
| Piran Geoscience Ltd | Professional & scientific | 2025 |
| Piran Heights Management Company Limited | Professional & scientific | 2002 |