| PB Mentor Limited | Information & communication | 2017 |
| PBE Engineering Limited | Professional & scientific | 2002 |
| PBF Care Limited | Health & social care | 2026 |
| PC Flooring Ltd | Construction | 2004 |
| PC Flowing Screed Limited | Construction | 2019 |
| PDM Production Ltd | Manufacturing | 2007 |
| Peace of Mind Home Help Limited | Other services | 2012 |
| Peace UK Limited | Information & communication | 1984 |
| Peacehaven Homes Ltd | Construction | 2023 |
| Pebbles School of Motoring Ltd | Education | 2021 |
| Pegasus Court (New Milton) Management Company Limited | Households | 1968 |
| Penningtons Car Care Ltd | Administrative & support | 2015 |
| Pennton Investments Limited | Hospitality | 2005 |
| Penny & Giles Aerospace Limited | Manufacturing | 1989 |
| Penny & Giles Controls Limited | Manufacturing | 1965 |
| Penton Poole 2013 Limited | Construction | 2013 |
| Penton Securities Limited | Wholesale & retail | 1993 |
| People First Consulting Ltd | Professional & scientific | 2023 |
| People First Property Ltd | Real estate | 2020 |
| Perfectlydata Ltd | Information & communication | 2017 |
| Performance Golf Limited | Arts & recreation | 2016 |
| Performance Products Limited | Wholesale & retail | 1995 |
| Performance Purchasing Limited | Professional & scientific | 2008 |
| Pet Garden Ltd | Manufacturing | 2026 |
| Petersfinger Orchard Limited | Construction | 2019 |
| Peveril Enterprises Limited | Hospitality | 2011 |
| PG Sports Ltd | Information & communication | 2025 |
| PGB Associates Ltd | Professional & scientific | 2022 |
| PGS Building Contractors Limited | Construction | 2014 |
| Phil Vinter Film Ltd | Information & communication | 2017 |
| Philip Bowdidge Accountancy Limited | Professional & scientific | 2002 |
| Philippa Hale & Associates Limited | Professional & scientific | 2003 |
| Philosophies Consulting Ltd | Administrative & support | 2012 |
| Phoenix Trading Consultancy Ltd | Information & communication | 2026 |
| Physio Fitness Bournemouth Limited | Health & social care | 2014 |
| Picnic Park Deli Limited | Hospitality | 2022 |
| Pics Accounting Ltd | Professional & scientific | 2021 |
| Pics Consultancy Ltd. | Information & communication | 2014 |
| Picture This (Imaging) Limited | Professional & scientific | 2006 |
| Pims (IFA) Limited | Professional & scientific | 2007 |
| Pinecrest Construction Ltd | Construction | 2019 |
| Pinocchio Christchurch Ltd | Hospitality | 2020 |
| Pinwheelfun Ltd | Wholesale & retail | 2025 |
| Piper Installations Limited | Construction | 2007 |
| Piscario Limited | Wholesale & retail | 2018 |
| Pithouse Consultancy Ltd | Professional & scientific | 2020 |
| Pixii Ltd | Manufacturing | 2020 |
| Plane Pull | Other services | 2019 |
| Planet Surface Ltd | Administrative & support | 2022 |
| Plastic Green Energy Ltd | Professional & scientific | 2019 |
| Plate Modern Ltd | Wholesale & retail | 2023 |
| Platinum One Hotels Limited | Hospitality | 2003 |
| Playdon Limited | Construction | 1984 |
| Plcc Holding Ltd | Manufacturing | 2024 |
| Plumb Exchange Limited | Construction | 2014 |
| Plumbfit UK Ltd | Wholesale & retail | 2009 |
| Podzz Ltd | Construction | 2025 |
| Point Builders Limited | Construction | 2002 |
| Polebrook Limited | Real estate | 1993 |
| Pollitt Property Ltd | Real estate | 2025 |
| Pollittbureau Art Print Limited | Administrative & support | 2008 |
| Pooch and Ponies Ltd | Other services | 2014 |
| Poole Military Tattoo Ltd | Administrative & support | 2026 |
| Poole Scaffolding (Dorset) Ltd | Construction | 2017 |
| Poolshopuk Limited | Wholesale & retail | 2023 |
| Popular Plumbing & Heating Ltd | Construction | 2026 |
| Portfield RTM Company Limited | Households | 2005 |
| Porthminster Hotel Company Limited | Hospitality | 1893 |
| Positive Futures Housing Ltd | Real estate | 2020 |
| Positively Human Limited | Wholesale & retail | 2015 |
| Powered From Within Personal Training Limited | Arts & recreation | 2021 |
| PP Commercial Enterprises Limited | Real estate | 1990 |
| Ppsts Limited | Wholesale & retail | 2009 |
| Praetorian London Limited | Administrative & support | 2013 |
| Precise Sheet Metal Limited | Construction | 2024 |
| Precision Hydration Limited | Professional & scientific | 2011 |
| Presentation Media Limited | Wholesale & retail | 2001 |
| Pride Painting & Decorating Limited | Administrative & support | 2017 |
| Prime Drainage Solutions Ltd | Water & waste | 2026 |
| Principle Training Solutions Limited | Education | 2014 |
| Priory Aesthetics Ltd | Other services | 2022 |
| Priory Concept Group Ltd | Financial services | 2022 |
| Priory Events Limited | Hospitality | 2026 |
| Priory Property (Christchurch) Holdings Limited | Financial services | 2025 |
| Priory Training Ltd | Education | 2023 |
| Priory Veterinary Group (Christchurch) Ltd | Professional & scientific | 2014 |
| Priory View Properties Limited | Construction | 1989 |
| Pristine Decorating Limited | Construction | 2021 |
| Private Rental Housing Company Limited | Real estate | 2015 |
| Pro Build & Window Care Ltd | Manufacturing | 2023 |
| Pro Electrics (Southern) Ltd | Manufacturing | 2015 |
| Pro Motors Limited | Wholesale & retail | 2006 |
| Pro Recruitment Ltd | Administrative & support | 2011 |
| Pro-Tech Plumbers Limited | Construction | 2017 |
| PRO2COL Holdings Limited | Information & communication | 2025 |
| PRO2COL Limited | Information & communication | 2004 |
| Proactive Trading (Hampshire) Ltd | Professional & scientific | 2002 |
| Prodetail Limited | Administrative & support | 2025 |
| Professional Performance Centre Ltd | Education | 2025 |
| Professional Services Group (PSG) Ltd | Information & communication | 2019 |