| Pgonline Ltd | Education | 2013 |
| PH Initiatives Ltd | Professional & scientific | 2011 |
| Pharaoh Legal Limited | Professional & scientific | 2017 |
| Pharmaquorum Limited | Professional & scientific | 2016 |
| Pharmora Holdings Limited | Financial services | 2024 |
| Pharmora Limited | Professional & scientific | 2010 |
| Phil Webb Actuarial Consulting Limited | Information & communication | 2017 |
| Philip Hall & Co Ltd | Professional & scientific | 2012 |
| Phoenix 32 Limited | Professional & scientific | 2013 |
| Phoenix Court Dorchester Management Limited | Households | 2012 |
| Phoenix Properties (2000) Limited | Administrative & support | 2000 |
| Phoenix Therapies Limited | Professional & scientific | 2014 |
| Phosphor Art Limited | Professional & scientific | 1998 |
| Physiques & Shapes Health Club Ltd | Health & social care | 2002 |
| Piddle Valley Business Services Limited | Administrative & support | 2015 |
| Piddlehinton Employment Limited | Administrative & support | 2019 |
| Piddlehinton Gym Limited | Arts & recreation | 2006 |
| Piddlehinton Workshop Ltd | Transport & logistics | 2025 |
| Pilates With Verity Limited | Arts & recreation | 2024 |
| Pinac Trio Limited | Other services | 2018 |
| Pinches Limited | Health & social care | 2016 |
| Pine View Investments Limited | Extraterritorial | 1959 |
| Pitch Property Rentals Ltd | Real estate | 2022 |
| Pithers Court (Number One) Commonhold Association Limited | Households | 2005 |
| Pitman & Family Ltd | Agriculture & fishing | 2011 |
| Pixel FOX Designs Ltd | Arts & recreation | 2025 |
| Pixie Innovations Ltd | Manufacturing | 2019 |
| PJM Economics Ltd. | Administrative & support | 2012 |
| PJR Installations Ltd | Construction | 2013 |
| Plamo Group Limited | Administrative & support | 2009 |
| Planet Information Limited | Extraterritorial | 1998 |
| Planet Languages Limited | Administrative & support | 2000 |
| Plankbridge Ltd | Manufacturing | 2009 |
| Planning Delivery Services Ltd | Information & communication | 2024 |
| Platinum Cleaning Services Dorset Ltd | Administrative & support | 2025 |
| Play Nice Productions Limited | Arts & recreation | 2014 |
| PLB Basford Carpentry Limited | Construction | 2018 |
| PMS (Holdings) Limited | Construction | 1985 |
| PMW Leadworks Limited | Construction | 2015 |
| POD Technical Limited | Professional & scientific | 2015 |
| Pods and Pavilions Limited | Wholesale & retail | 2024 |
| Point Perfect Services Ltd | Administrative & support | 2019 |
| Polka DOT Event Production Ltd | Administrative & support | 2020 |
| Poncho Care Limited | Information & communication | 2020 |
| Pontcombe Estates | Real estate | 2003 |
| Poole Bay Press Limited | Professional & scientific | 2006 |
| Poole Harbour Health Limited | Health & social care | 2016 |
| Poole Storage Ltd | Transport & logistics | 2023 |
| Poppy Delevingne Limited | Professional & scientific | 2012 |
| Poppy Engineering Limited | Manufacturing | 2005 |
| Portex Portland Limited | Construction | 2001 |
| Portland Beach Crossfit & Watersports Ltd | Arts & recreation | 2020 |
| Portland Joinery Limited | Manufacturing | 2002 |
| Portland Nature Community Interest Company | Other services | 2020 |
| Post Green Services Limited | Agriculture & fishing | 2014 |
| Potato Perfection Limited | Manufacturing | 2026 |
| Potters Leisure (Crediton) Ltd | Hospitality | 2012 |
| Pouncy Hall Management Company Limited | Households | 2017 |
| Pound Lane Residents Management Company Limited | Households | 1977 |
| Poundbury (Manco 4) Limited | Households | 2021 |
| Poundbury (Manco 1) Limited | Households | 1994 |
| Poundbury (Manco 2) Limited | Households | 1998 |
| Poundbury (Manco 3) Limited | Households | 2003 |
| Poundbury Business Centre Management Company Limited | Households | 2010 |
| Poundbury Cancer Centre Ltd | Professional & scientific | 2015 |
| Poundbury Chiropractic Limited | Health & social care | 2023 |
| Poundbury Clinic Management LLP | | 2004 |
| Poundbury Express Ltd | Transport & logistics | 2026 |
| Poundbury Garage Limited | Administrative & support | 2008 |
| Poundbury Mobility Ltd | Wholesale & retail | 2019 |
| Poundbury Partners Limited | Administrative & support | 2008 |
| Poundbury Plumbing & Heating Ltd | Construction | 2022 |
| Poundbury Property Ltd | Real estate | 2014 |
| Poundbury Spa LLP | | 2018 |
| Poundbury Systems Ltd | Information & communication | 2001 |
| Poundbury Wealth Management LLP | | 2012 |
| Powell Energy Assessors Ltd | Professional & scientific | 2022 |
| Powerhaul International Limited | Transport & logistics | 2013 |
| Powup Limited | Information & communication | 2014 |
| Precise Building and Roofing (SW) Ltd | Construction | 2020 |
| Precision Acoustics Limited | Manufacturing | 1990 |
| Prestyn Health Ltd | Health & social care | 2025 |
| Pride Construction Group Limited | Construction | 2016 |
| Prima Building Solutions Ltd | Construction | 2022 |
| Prima Planning Solutions Limited | Professional & scientific | 2007 |
| Primary TDR Authorisation Body Limited | Professional & scientific | 2011 |
| Primary Trustworthy Digital Repository Authorisation Body Limited | Professional & scientific | 2011 |
| Prince of Wales Residents Company Limited | Hospitality | 2005 |
| Princes Court (Puddletown) Management Company Limited | Real estate | 2004 |
| Print 'N' Press Ltd | Manufacturing | 2008 |
| Print in the BAG Ltd | Manufacturing | 2008 |
| Print Shop Express Ltd | Manufacturing | 2011 |
| Priory Asset Finance Limited | Financial services | 2015 |
| Priory Quay Management Company Limited | Real estate | 1987 |
| Privatefuture Property Management Limited | Health & social care | 1992 |
| Pro Plant Hire Limited | Administrative & support | 2024 |
| Pro-Active Joinery and Construction Limited | Construction | 2006 |
| Pro-Group Scaffolding Hampshire Limited | Construction | 2026 |
| Pro-Scaff Dorset Limited | Construction | 2020 |
| Proactive Pest Prevention Limited | Administrative & support | 2012 |