| Poole Town FC Wessex CIC | Education | 2023 |
| Poole Tyre Services (Property Management) Limited | Wholesale & retail | 1972 |
| Poole Vascular Limited | Health & social care | 2026 |
| Poole Vending Limited | Hospitality | 2026 |
| Poole Watersports Library CIC | Arts & recreation | 2019 |
| Pooleit Ltd | Other services | 2013 |
| Pooltec Maintenance Ltd | Manufacturing | 2013 |
| Poolwaterts Ltd | Information & communication | 2020 |
| POP Passport Ltd | Wholesale & retail | 2026 |
| POP4DIABETES Limited | Other services | 2015 |
| Popcourt Management Limited | Households | 2009 |
| Poppy Place Management Company Limited | Households | 2020 |
| Poppy's Tutoring Company Limited | Education | 2025 |
| Port House Lilliput Limited | Professional & scientific | 2024 |
| Port Iona Management Limited | Households | 1986 |
| Port Phones Limited | Information & communication | 2025 |
| Port View Freehold Limited | Households | 2012 |
| Portakal Limited | Hospitality | 2024 |
| Portarlington Court Freehold Limited | Households | 1999 |
| Portchester Owners Limited | Households | 2014 |
| Portents Limited | Other services | 2025 |
| Porth Beach Holdings Limited | Real estate | 2008 |
| Portias Garage Ltd | Wholesale & retail | 2019 |
| Portland Properties & Investments Limited | Real estate | 2024 |
| Portman Promotions (Enterprises) Limited | Construction | 1975 |
| Portobello Property UK and Ireland Limited | Financial services | 2021 |
| Portswood House Limited | Professional & scientific | 1916 |
| Poseidon Electrical Ltd | Construction | 2025 |
| Posejdon Marine Ltd | Professional & scientific | 2021 |
| Posh Poise Lingerie Limited | Wholesale & retail | 2022 |
| Positive Potential Ltd | Health & social care | 2022 |
| Positive Power Solar Limited | Extraterritorial | 2023 |
| Positive Projects Ltd | Other services | 2014 |
| Positive Protect Ltd | Other services | 2019 |
| Possibly Lizards Limited | Information & communication | 2018 |
| Post My Parcels Limited | Transport & logistics | 2012 |
| Postcard Imperium Ltd | Wholesale & retail | 2025 |
| Potfaced Ltd | Extraterritorial | 2024 |
| Potty Pros Academy Ltd | Information & communication | 2026 |
| Potty Training Academy Ltd | Education | 2015 |
| Poundbury Build & Maintenance LLP | | 2019 |
| Pour LA Ltd | Information & communication | 2025 |
| Pours&Paws Ltd | Hospitality | 2025 |
| Powdertec Solutions LLP | | 2011 |
| Powell Lodge Management Company Limited | Households | 1978 |
| Power and Sail Limited | Manufacturing | 2010 |
| Power Medico-Legal Consultancy Limited | Health & social care | 2015 |
| Power UP Charging Systems Limited | Wholesale & retail | 2011 |
| Powerboat Club UK Ltd | Transport & logistics | 2023 |
| Powerboat Training UK Limited | Administrative & support | 2005 |
| POWERIT365 Ltd | Information & communication | 2020 |
| Powermann Ltd | Construction | 2024 |
| Poweron Electrical Installations Limited | Construction | 2015 |
| Powers That BE Limited | Information & communication | 2025 |
| Powr of YOU Ltd | Information & communication | 2014 |
| PP Convenience Store Ltd | Wholesale & retail | 2023 |
| PP Fuel Ltd | Wholesale & retail | 2019 |
| PP Ventures Ltd | Real estate | 2022 |
| Pp.Composites UK Limited | Other services | 2024 |
| Ppcnest Limited | Professional & scientific | 2023 |
| Ppmc Limited | Professional & scientific | 2003 |
| PPP Holdings Dorset Ltd | Real estate | 2026 |
| PPP Media Marketing Limited | Professional & scientific | 2023 |
| Practical Home Solutions Ltd | Wholesale & retail | 2020 |
| Prad Sushi Ltd | Hospitality | 2025 |
| Praesidium Security Solutions Ltd | Administrative & support | 2025 |
| Praluxdigtal Limited | Wholesale & retail | 2025 |
| Pranathan Constructions Ltd | Construction | 2026 |
| Prangalert Limited | Information & communication | 2008 |
| Prasanth Services Ltd | Wholesale & retail | 2019 |
| Praxis Captial Ltd | Information & communication | 2025 |
| Preca Limited | Information & communication | 2023 |
| Precise Architecture Ltd | Professional & scientific | 2023 |
| Precision Auto Repairs Dorset Ltd | Wholesale & retail | 2026 |
| Precision Jetting and Drainage Ltd | Construction | 2025 |
| Precision Pencil Ltd | Manufacturing | 2025 |
| Precision Quality Inspection Limited | Professional & scientific | 2016 |
| Precision Repairs Double Glazing Ltd | Other services | 2014 |
| Precision Roofing Dorset Ltd | Construction | 2025 |
| Precision Surface Preparation Ltd | Construction | 2025 |
| Precision Turned Parts Ltd | Manufacturing | 2013 |
| Preconstructive Limited | Information & communication | 2025 |
| Prediction Media Ltd | Professional & scientific | 2026 |
| Premfast Holdings Limited | Wholesale & retail | 2021 |
| Premfast Ltd | Wholesale & retail | 2008 |
| Premier BK Properties Ltd | Real estate | 2024 |
| Premier Decking Ltd | Construction | 2025 |
| Premier Dentures Limited | Manufacturing | 2015 |
| Premier Home Developments Ltd | Construction | 2019 |
| Premier Sports Customs Limited | Wholesale & retail | 2023 |
| Premier Underwriting (UK) Limited | Extraterritorial | 2008 |
| Premier Underwriting Limited | Financial services | 1999 |
| Premium First Sales Ltd | Wholesale & retail | 2020 |
| Premium Health Goods Ltd | Information & communication | 2021 |
| Premium Presence Limited | Manufacturing | 2012 |
| Premium Pro Products Ltd | Wholesale & retail | 2023 |
| Premiumswift Property Management Limited | Households | 1995 |
| Premlata Nexrise Ventures Ltd | Wholesale & retail | 2025 |
| Premo Property Group Ltd | Financial services | 2019 |
| Premo Property Ltd | Real estate | 2018 |