| Park House (Plymouth) RTM Company Limited | Households | 2023 |
| Park View Residents (Plymouth) Management Company Limited | Real estate | 2000 |
| Parker Measured Surveys Ltd | Construction | 2023 |
| Parkside (Barnstaple) Limited | Extraterritorial | 1991 |
| Parkview (Plymouth) Management Company Limited | Households | 2005 |
| Parkview House Management Company (Plymouth) Limited | Real estate | 2014 |
| Parkwall Pre-School Limited | Health & social care | 2015 |
| Parkways Garage Ltd. | Wholesale & retail | 2021 |
| Parlby Somerville Ltd | Professional & scientific | 2021 |
| Parman Group Limited | Construction | 1973 |
| Parrott Construction Services Limited | Construction | 2008 |
| Parslink Ltd | Hospitality | 2026 |
| Parson Funeral Directors Ltd | Extraterritorial | 2020 |
| Parson Funeral Services Ltd | Extraterritorial | 2020 |
| Partners in Supply Limited | Administrative & support | 2008 |
| Parton Grange (Management) Limited | Households | 1986 |
| Partsound Limited | Hospitality | 2003 |
| Parupietis Logistics Ltd | Transport & logistics | 2026 |
| PAS Tech Ltd | Construction | 2018 |
| Pascal Offshore Ltd | Professional & scientific | 2024 |
| Pasoti Limited | Information & communication | 2021 |
| Passion for Property Limited | Construction | 2023 |
| Passion Marketing and Promotions Ltd | Manufacturing | 2012 |
| Passion-Ate (SW) Ltd | Wholesale & retail | 2021 |
| Passive Fire Services Ltd | Construction | 2023 |
| Pasta Box Fusion Street Food Limited | Hospitality | 2024 |
| Pastuszak Limited | Wholesale & retail | 2015 |
| Patch Them UP Training Ltd | Education | 2022 |
| Pathgate Horn Investments Limited | Real estate | 2020 |
| Pathgate Properties Limited | Real estate | 2016 |
| Pathivara Limited | Wholesale & retail | 2021 |
| Patna (Properties) Plymouth Ltd | Real estate | 2013 |
| Patna Place Management Limited | Households | 1992 |
| Patost Ltd | Administrative & support | 2023 |
| Patricia Rose Charters Ltd | Agriculture & fishing | 2014 |
| Patrick Investment (Devon) Limited | Real estate | 2017 |
| Patrick James and Co ( SW ) Ltd | Professional & scientific | 2017 |
| Patrick James Property (Devon) Ltd | Real estate | 2024 |
| Patritec Ltd | Information & communication | 2010 |
| Paul Body Properties Limited | Households | 2002 |
| Paul Body Roofing & Building Limited | Construction | 1994 |
| Paul Fassam Geomatics Limited | Professional & scientific | 2008 |
| Paul Hall Plastering Limited | Construction | 2015 |
| Paul Inch Engine Services Limited | Wholesale & retail | 2003 |
| Paul Little Construction Ltd | Construction | 2017 |
| Paul Mackenzie Consulting Limited | Professional & scientific | 2024 |
| Paul Maloney Limited | Other services | 2011 |
| Paul Rosevear Roofing & Builders Ltd. | Construction | 2012 |
| Paul Rowden Construction Ltd | Construction | 2022 |
| Paul Shannon Health and Fitness Limited | Other services | 2014 |
| Paul Stone Property Expert Ltd | Real estate | 2022 |
| Paul Taylor (Solicitors) Limited | Professional & scientific | 2005 |
| Paul Vincent Motor Services Ltd | Wholesale & retail | 2015 |
| PAW Care Clinic Ltd | Professional & scientific | 2024 |
| Pawcommand Ltd | Wholesale & retail | 2025 |
| Paws @ the Junction Ltd | Other services | 2023 |
| Pawthentic Pet Company Ltd | Wholesale & retail | 2025 |
| Payroll Services SW Limited | Professional & scientific | 2019 |
| Payrolling Wizards Ltd | Professional & scientific | 2024 |
| PB Holdings (Barbican) Ltd | Hospitality | 2020 |
| PB Media and Marketing Limited | Administrative & support | 2018 |
| PB Pharm Ltd | Construction | 2023 |
| Pb&J Property Ltd | Real estate | 2026 |
| Pblhp Services Limited | Professional & scientific | 2011 |
| PBS Accounting Limited | Professional & scientific | 2021 |
| PBW Electrics Ltd | Construction | 2018 |
| PC KC Holdings Limited | Financial services | 2025 |
| PCB Plymouth Ltd | Wholesale & retail | 2015 |
| PCV Engineering Services (UK) Limited | Wholesale & retail | 2011 |
| PD Environmentals Ltd | Energy | 2017 |
| Pdavies Consultancy Limited | Construction | 2013 |
| PDC Motoring Centre Limited | Wholesale & retail | 2003 |
| PDE Test Consultancy Limited | Information & communication | 2016 |
| Pdmt Limited | Transport & logistics | 2018 |
| Pdse Limited | Health & social care | 2021 |
| Peak Reach Ltd | Information & communication | 2019 |
| Pearce (Chandler) Limited | Construction | 2013 |
| Pearce (Churchill) Limited | Construction | 2013 |
| Pearce Barrack Limited | Construction | 2014 |
| Pearce Fine Homes Limited | Real estate | 1996 |
| Pearce Homes Holdings Ltd | Financial services | 2020 |
| Pearl Arena Limited | Financial services | 2002 |
| Pearson Associates Ltd | Financial services | 2026 |
| Pearson RAD Protection Services Limited | Professional & scientific | 2012 |
| Pearson Roofing Services Limited | Construction | 2023 |
| Pease Software Solutions Ltd | Information & communication | 2018 |
| Pebbles of Salcombe Ltd | Households | 2008 |
| PEC Management Services Ltd | Administrative & support | 2022 |
| PEC Trust | Information & communication | 2018 |
| Pecan Home Limited | Real estate | 2021 |
| Pecdis Enterprises Ltd | Administrative & support | 2024 |
| Peclem Investments UK Ltd | Wholesale & retail | 2022 |
| Peculiar Care Limited | Health & social care | 2024 |
| Pedh Consulting Limited | Public administration | 2009 |
| Pedrick Limited | | 1962 |
| Pee-Xclusive Store Limited | Wholesale & retail | 2025 |
| Peerless Pigeon Games Ltd | Information & communication | 2011 |
| Pegas Transport Ltd | Transport & logistics | 2025 |
| Pegasi World Ltd | Information & communication | 2020 |
| Pegasolve Ltd | Information & communication | 2024 |