| Perna Properties Ltd | Real estate | 2025 |
| Perrylands Lane Management Company Limited | Households | 1993 |
| Personal Events Management Limited | Administrative & support | 2004 |
| Pete Smith Post Limited | Administrative & support | 2008 |
| Peter & DEE Airey Ltd | Arts & recreation | 2025 |
| Peter Ashford Limited | Professional & scientific | 2022 |
| Peter Cowan Ltd | Wholesale & retail | 2009 |
| Peter Henry Cooper Limited | Financial services | 2013 |
| Peter Highwood Limited | Agriculture & fishing | 1951 |
| Peter Neal Consulting Ltd | Professional & scientific | 2011 |
| Peter Tyson Consulting Limited | Information & communication | 2010 |
| Pets Fayre Ltd | Wholesale & retail | 2003 |
| Pets Naturally Healthcare Limited | Wholesale & retail | 2021 |
| Pets Naturally Limited | Professional & scientific | 2021 |
| Pets Whiskers LLP | | 2014 |
| Phase One Design Ltd | Professional & scientific | 2003 |
| PHG Participations Ltd | Professional & scientific | 2023 |
| Phidias Contemporary Ltd | Wholesale & retail | 2019 |
| Philippa Jackson Ltd | Transport & logistics | 2024 |
| Phillips Brickwork and Construction Limited | Construction | 2017 |
| Philocaly Ltd | Manufacturing | 2017 |
| Phoenix Piano Systems Limited | Administrative & support | 2010 |
| Phoenix Refurbishments Limited | Real estate | 2026 |
| Phoenix Security Professionals Ltd | Administrative & support | 2025 |
| Phoenix Solutions 1972 Ltd | Professional & scientific | 2022 |
| Phoenix Total Wellness Ltd | Health & social care | 2017 |
| Physique Coaching Ltd | Professional & scientific | 2014 |
| Pickle Pops Coaching Limited | Education | 2025 |
| Pickworth Anaesthesia Limited | Health & social care | 2022 |
| Pierce Hill Project Services Limited | Administrative & support | 1991 |
| Piglet Projects Limited | Information & communication | 1998 |
| Pilates Hampshire Limited | Education | 2026 |
| Pilbeam Management Limited | Administrative & support | 2007 |
| Pillar & Peak Construction Ltd | Construction | 2026 |
| Pimmy’Z Catering Limited | Hospitality | 2025 |
| Pine Cottage Properties Ltd | Real estate | 2023 |
| Pine Mountain Lettings Limited | Real estate | 2022 |
| Pine Property Maintenance & Landscaping Ltd | Construction | 2026 |
| Pingala Commercial Limited | Real estate | 2017 |
| Pingala Media Limited | Information & communication | 2009 |
| Pink Polpo Ltd | Professional & scientific | 2023 |
| Pinks Group Ltd | Manufacturing | 2022 |
| PINS4PRINS Ltd | Other services | 2026 |
| PIP & POP Limited | Wholesale & retail | 2018 |
| Pippins Close Management Company Limited | Households | 2005 |
| Pitch Pods Limited | Arts & recreation | 2017 |
| Pivot Film Productions Limited | Information & communication | 2010 |
| Pixelheaven Limited | Wholesale & retail | 2016 |
| Pizza Olivia Limited | Hospitality | 2023 |
| PKD Partners Ltd | Health & social care | 2025 |
| PKP Services Limited | Construction | 2009 |
| Pksm Holdings Limited | | 1982 |
| Plan EV Ltd | Construction | 2018 |
| Planet Jj's Ltd | Hospitality | 2018 |
| Plase Construction Services Limited | Administrative & support | 2009 |
| Plase Investments Limited | Real estate | 2022 |
| Plase Properties Limited | Construction | 2025 |
| Plaster Motif Ltd | Construction | 2011 |
| Plastic Dynamics Ltd | Other services | 2016 |
| Platinum EGG Limited | Other services | 2020 |
| Platinum PUB Co Limited | Hospitality | 2013 |
| Platt House LLP | | 2015 |
| Play Sport Fitness CIC | Other services | 2024 |
| Play Sport Management Limited | Other services | 2019 |
| Playden Oasts (Sussex) Limited | Hospitality | 2016 |
| Pleasant Corner Ltd | Hospitality | 2023 |
| Plexus Business Solutions Limited | Information & communication | 2001 |
| Plsr Engineering Ltd | Professional & scientific | 2021 |
| Plum Travel Limited | Administrative & support | 2012 |
| PM Carpets Ltd | Construction | 2024 |
| PM Project Solutions Ltd | Professional & scientific | 2018 |
| PMC Kent Electrical Limited | Construction | 2018 |
| PMJ Foods UK Ltd. | Manufacturing | 2010 |
| PMP Mechanical Distributions Ltd | Construction | 2025 |
| PN Medical Limited | Health & social care | 2021 |
| PN7 Ltd | Agriculture & fishing | 2010 |
| PNF Management Ltd | Professional & scientific | 2020 |
| Pnoe Ltd | Information & communication | 2019 |
| Poconnor Limited | Transport & logistics | 2018 |
| POD Storage Ltd | Transport & logistics | 2023 |
| Point CNC Limited | Manufacturing | 1995 |
| Polar Automotive Limited | Wholesale & retail | 1998 |
| Polar Real Estate Limited | Professional & scientific | 2004 |
| Pole Star Publications Limited | Information & communication | 1994 |
| Policy Expert Claims Ltd | Professional & scientific | 2013 |
| Polyloop Ltd | Information & communication | 2024 |
| Pontevisum LLP | | 2023 |
| Poppy's Day Nursery Limited | Education | 2008 |
| Portman Canham LLP | | 2025 |
| Positive Self Ltd | Health & social care | 2013 |
| Post House Productions Ltd | Information & communication | 2025 |
| Potter Property Management Limited | Real estate | 2024 |
| Pound Construction Ltd | Administrative & support | 2025 |
| Pour the Perfect Pint Limited | Professional & scientific | 2010 |
| Powder Mill Bar Limited | Hospitality | 2022 |
| Powder Mill Productions Limited | Arts & recreation | 2020 |
| Power Building Services Limited | Construction | 1987 |
| Powerhouse Cleaning and Maintenance Limited | Other services | 2002 |
| PPA Consulting Services Limited | Health & social care | 2023 |
| PR & TPR Garrod Bower Practice Ltd | Health & social care | 2013 |