| Plaza Claims Limited | Administrative & support | 2021 |
| Plaza Properties Limited | Financial services | 2019 |
| Plcs Trading Limited | Professional & scientific | 2008 |
| Plumb-In Limited | Wholesale & retail | 1985 |
| Plumbing & Electrical Contracts Limited | Wholesale & retail | 2005 |
| Plumbworx Plumbing & Heating Limited | Construction | 2004 |
| Plymouth Casino Slots Limited | Financial services | 2023 |
| Plymouth Diocesan Trustee Company Limited | Other services | 2023 |
| Plymouth Fancy Dress Ltd | Wholesale & retail | 2026 |
| Plymouth Garden Machinery Limited | Wholesale & retail | 2007 |
| Plymouth Pet Cremations Ltd | Water & waste | 2026 |
| PM Wealth LLP | | 2024 |
| Pmbtech Limited | Information & communication | 2016 |
| PMR Architects Ltd | Professional & scientific | 2019 |
| Podiatry Plus Limited | Health & social care | 2005 |
| Point Reach Management Company Limited | Real estate | 2019 |
| Polestar Events Limited | Administrative & support | 2014 |
| Polglas Limited | Construction | 2006 |
| Pondman Ltd | Administrative & support | 2010 |
| Poolside Farmhouses & Cottages Limited | Real estate | 1997 |
| Poppins Day Nursery SW Ltd | Health & social care | 2023 |
| Porcement Limited | Water & waste | 2022 |
| Portal Healthcare Limited | Health & social care | 2024 |
| Portcullis Property Limited | Information & communication | 2000 |
| Porter Education Limited | Education | 2024 |
| Portfolio Properties ARM Limited | Real estate | 2016 |
| Portokali Ltd | Information & communication | 2024 |
| Posterlink Limited | Professional & scientific | 2007 |
| Postscript Books Ltd | Wholesale & retail | 1983 |
| Potters Yard Management Company (Liverton) Limited | Real estate | 2001 |
| Pottery Commercials Limited | Wholesale & retail | 2012 |
| Pound Place Management Company Limited | Real estate | 2006 |
| Power of 4 Publishing UK Ltd | Information & communication | 2024 |
| Power Park (Heathfield) Manco Ltd | Administrative & support | 2020 |
| Powertoolbuddy Limited | Transport & logistics | 2023 |
| Praderi & Co Limited | Manufacturing | 2022 |
| Praxonomy Limited | Information & communication | 2021 |
| Precision Laser Cutting Ltd | Manufacturing | 2025 |
| Precision Lifts Limited | Construction | 2005 |
| Premier Gym & Fitness Ltd | Arts & recreation | 2021 |
| Premier Holdings Devonshire Limited | Extraterritorial | 2018 |
| Premier Kickboxing Newton Abbott LLP | | 2018 |
| Premier Paraplanning Solutions Ltd | Professional & scientific | 2021 |
| Prentice Butchers Ltd | Wholesale & retail | 2020 |
| Preston Coombe Farms Limited | Agriculture & fishing | 2012 |
| Preston Partners Limited | Health & social care | 2004 |
| Preston Plant Limited | Administrative & support | 2014 |
| PRG Lulek Ltd | Extraterritorial | 2021 |
| Price & Co (South West) Limited | Professional & scientific | 2017 |
| Price Windows Ltd | Construction | 2020 |
| Pricemaster Ltd | Information & communication | 2025 |
| Primal Mvmnt Ltd | Other services | 2020 |
| Prime Construction Solutions Limited | Construction | 2021 |
| Prime Management (Newton Abbot) Limited | Households | 2010 |
| Prime Pirates Ltd | Wholesale & retail | 2026 |
| Primious LLP | | 2015 |
| Print Source (UK) Ltd | Administrative & support | 2006 |
| Prioritise Assistants Ltd | Professional & scientific | 2018 |
| Priority Pixels (Holdings) Limited | Professional & scientific | 2019 |
| Priprop Ltd | Real estate | 2020 |
| Prispen House Management Company Limited | Real estate | 2002 |
| PRJ Masonry & Construction Limited | Construction | 2020 |
| Pro - Direct Group Limited | Professional & scientific | 2008 |
| Pro - Direct Media Limited | Extraterritorial | 2007 |
| Pro S N R Ltd | Professional & scientific | 2025 |
| Pro Sweep Devon Ltd | Administrative & support | 2023 |
| Pro-Direct Academy Limited | Professional & scientific | 2017 |
| Pro-Direct Logistics UK Limited | Real estate | 2022 |
| Pro-Direct Soccer Academy Limited | Extraterritorial | 2012 |
| Pro-Direct Soccer Limited | Extraterritorial | 2008 |
| Pro-Direct Sport Europe Limited | Professional & scientific | 2011 |
| Pro-Direct Sport Limited | Wholesale & retail | 2001 |
| Pro-Direct Stores Limited | Wholesale & retail | 2018 |
| Pro-Optima Limited | Health & social care | 2006 |
| Pro-Point Southwest Limited | Construction | 2014 |
| Probert Solutions Ltd | Information & communication | 2014 |
| Probuild Group Holdings Limited | Financial services | 2026 |
| Probuild Scaffolding Limited | Construction | 2016 |
| Probus Property Developments Limited | Construction | 2017 |
| Professional Access Ltd | Construction | 2023 |
| Professional Equine Academy Ltd | Other services | 2019 |
| Professional Investment Group Ltd | Financial services | 2017 |
| Professional Safety Services (South West) Limited | Professional & scientific | 2013 |
| Proficiency Plus Limited | Professional & scientific | 2015 |
| Proforming Cars Limited | Wholesale & retail | 2016 |
| Progen Power Ltd | Construction | 2020 |
| Program Limited | Professional & scientific | 2011 |
| Progressive B2B Limited | Financial services | 2023 |
| Project Sponge Cake Ltd | Construction | 2016 |
| Promech Farm Distribution Limited | Wholesale & retail | 2009 |
| Promorph Ltd | Information & communication | 2019 |
| Promrunr Limited | Transport & logistics | 2023 |
| Proper Flap & Jack Construction Limited | Construction | 2024 |
| Proper Flap & Jack Investments Ltd | Real estate | 2014 |
| Property Photographic Limited | Professional & scientific | 2018 |
| Proplans Architectural Design Limited | Professional & scientific | 2014 |
| Prosauce Ltd | Manufacturing | 2025 |
| Prosauceuk Limited | Manufacturing | 2023 |
| Prosector Education Ltd | Education | 2026 |
| Prosigns and Graphics Southwest Ltd | Professional & scientific | 2019 |