| Peco Publications & Publicity,Limited | Extraterritorial | 1951 |
| Peirson & Peirson Ltd | Other services | 2006 |
| Pemros Dental Practice Limited | Health & social care | 2007 |
| Peng Productions Limited | Information & communication | 2015 |
| Peninsula Training, Development and Consultancy Services Ltd | Professional & scientific | 2003 |
| Pennsylvania Management Company (Exeter) Limited | Households | 1975 |
| Pennywell Farm Limited | Agriculture & fishing | 1998 |
| Penstar Construction Services Limited | Professional & scientific | 2017 |
| Peolane-Thuo Ltd | Health & social care | 2019 |
| Perrigo Pharma Limited | Wholesale & retail | 1982 |
| Perry Brothers Limited | Real estate | 2006 |
| Perry Mason Limited | Extraterritorial | 2003 |
| Personnel Solutions Recruitment U.K Limited | Administrative & support | 2005 |
| Pet Collective Education Ltd | Education | 2022 |
| Peter Brown 2006 Limited | Wholesale & retail | 2006 |
| Peter Gowen Limited | Administrative & support | 2007 |
| Peter J Wheatley Ltd | Construction | 2004 |
| Petersen Racing Limited | Wholesale & retail | 1998 |
| PFG Fabrication Limited | Manufacturing | 2006 |
| PH Payroll Ltd | Professional & scientific | 2004 |
| Pharos Holdings Group Limited | Financial services | 2023 |
| Phenster Property Holdings Limited | | 1980 |
| Philippe Couve Limited | Construction | 2002 |
| PIA LDN Ltd | Professional & scientific | 2015 |
| Pickle Holdings SW Ltd | Financial services | 2024 |
| Pickwell Gardens Limited | Agriculture & fishing | 1958 |
| Pillivant Limited | Wholesale & retail | 2025 |
| Pindar Lodge Management Limited | Households | 1983 |
| Pine Park Limited | Wholesale & retail | 2003 |
| Pinkord Ltd | Other services | 2024 |
| Planet Botanic LLP | | 2007 |
| Planwest Limited | Hospitality | 2003 |
| Plas-Shop Limited | Wholesale & retail | 2021 |
| Platinum Professional (SW) Limited | Wholesale & retail | 2010 |
| Plymouth and Devon Metal Fabrications Limited | Manufacturing | 2006 |
| Plymouth Argyle Football Club Limited | Arts & recreation | 2011 |
| Plymouth Caravan Centre Limited | Transport & logistics | 2000 |
| Plymouth Chiropractic Clinic Limited | Health & social care | 1999 |
| Plymouth Highbury Trust | Health & social care | 2005 |
| Plymouth Homes Limited | Real estate | 2005 |
| Plymouth Leisure Limited | Arts & recreation | 2003 |
| Plymouth Music Collective C.I.C. | Information & communication | 2005 |
| Plymouth Osteopaths Limited | Wholesale & retail | 2003 |
| Plymouth Property Rentals Ltd | Hospitality | 1988 |
| Plymstock Carpets and Flooring Limited | Wholesale & retail | 2004 |
| Podiacare Limited | Health & social care | 1987 |
| Podshavers Barn Limited | Hospitality | 1999 |
| Polinni Ltd | Administrative & support | 2018 |
| Polmar Properties Limited | | 1988 |
| Polyscape Ltd | Information & communication | 2003 |
| Pony and Carriage Ltd. | Other services | 2006 |
| Porte Electricite Limited | Construction | 1998 |
| Portland Court (Devonport) Management Company Limited | Households | 1983 |
| Portsmouth Handling Services Limited | Transport & logistics | 1990 |
| Potbury and Sons Limited | Wholesale & retail | 1951 |
| Powderham Forge Limited | Manufacturing | 2003 |
| Powell & Co Ltd | Manufacturing | 1993 |
| Precrete Construction Limited | Construction | 2001 |
| Premier Roofing Contractors Limited | Construction | 1998 |
| Prime Agency Ltd | Administrative & support | 2012 |
| Priory Mill Management Limited | Households | 1990 |
| Priory Paving Limited | Construction | 2004 |
| Pritchard Patent Product Co. Limited | Wholesale & retail | 1946 |
| Pritchard Patent Product Company (2001) Limited | Professional & scientific | 2001 |
| Production Engineering Services | | 1983 |
| Profitable Farming Company Limited | Manufacturing | 2002 |
| Profound Experiences Ltd | Extraterritorial | 2007 |
| Project Atlantic Bidco Limited | Financial services | 2025 |
| Project Atlantic Midco Limited | Financial services | 2025 |
| Project Atlantic Topco Limited | Financial services | 2025 |
| Projexe Engineering Limited | Construction | 2003 |
| Promethean Nails Ltd | Other services | 2024 |
| Pronexa Ltd | Other services | 2023 |
| Prospect Catering Limited | Hospitality | 1996 |
| Prospect Newsagents Limited | Wholesale & retail | 1996 |
| Protocol Capital Management Limited | Financial services | 2004 |
| Puffins of Exeter Ltd | Education | 2004 |
| Puffins Training Limited | Education | 2003 |
| Pugminster Limited | Professional & scientific | 1997 |
| Pulse Personnel Limited | Administrative & support | 2004 |
| Pulse Sport Limited | Other services | 2014 |
| Pumaford Limited | | 1985 |
| Pure Systems Ltd | Information & communication | 2006 |
| PWH Surveyors Ltd | Administrative & support | 2008 |
| Qhfs Limited | Financial services | 2003 |
| Qosta Ltd | Transport & logistics | 2018 |
| Quality Lifestyle Ltd | Health & social care | 2003 |
| Quantumia Ltd | Other services | 2023 |
| Quay Construction Southwest Limited | Construction | 2003 |
| Quay Garage (Barnstaple) Limited | Wholesale & retail | 2004 |
| Quay Garage (Braunton) Ltd | Wholesale & retail | 2005 |
| Quayside House Management Company Limited | Households | 1988 |
| Qube Renewables Limited | Water & waste | 2013 |
| Quest for Zest LLP | | 2007 |
| R & M Investments Limited | Construction | 1997 |
| R J Electrical Solutions Ltd | Construction | 2006 |
| R J Badcock (C.N.C.) Limited | Real estate | 1987 |
| R J Hookway Contractors Ltd | Agriculture & fishing | 2005 |
| R S Plant Hire Limited | Construction | 2005 |
| R T Marke & Co Limited | Professional & scientific | 2002 |