| Peplow PR Limited | Professional & scientific | 2002 |
| Peppermayo UK Ltd | Wholesale & retail | 2024 |
| Peppy Fragrance Ltd | Manufacturing | 2018 |
| Peppy Ltd | Wholesale & retail | 2017 |
| Perception Graphics LLP | | 2011 |
| Perdue Holdings Limited | Financial services | 2025 |
| Perennial Gardens Ltd | Administrative & support | 2011 |
| Perfect Potion Parties Limited | Arts & recreation | 2022 |
| Perfective Aesthetics Limited | Health & social care | 2021 |
| Performance - Workplace Development Ltd | Professional & scientific | 2012 |
| Perigean Tide Limited | Real estate | 2024 |
| Perimeter Construction Limited | Manufacturing | 2002 |
| Perring Design Limited | Administrative & support | 2004 |
| Perring Studio Limited | Professional & scientific | 2023 |
| Perriton Associates Limited | Hospitality | 2004 |
| Perrymead Properties Ltd | Households | 2012 |
| Personalise Products Limited | Wholesale & retail | 2015 |
| Perspex Cloud Limited | Information & communication | 2019 |
| Peshawa Barber Ltd | Other services | 2021 |
| Pesruches Investments Limited | Real estate | 2026 |
| Pest Minds CIC | Health & social care | 2026 |
| Peta Properties Limited | Real estate | 2016 |
| Peter Caldecott Limited | Administrative & support | 2011 |
| Petersfield Automotive Ltd | Wholesale & retail | 2025 |
| Petersfield Garages Limited | Wholesale & retail | 2011 |
| Petersfield Logs & Coal Ltd | Wholesale & retail | 2023 |
| Petworth Management Company Limited | Households | 1997 |
| Petworth Sports Ltd | Arts & recreation | 2025 |
| PGT Development Ltd | Real estate | 2012 |
| Pharos Quay Freehold Limited | Households | 1999 |
| Pharos Quay Limited | Households | 1991 |
| Phase and Form Ltd | Wholesale & retail | 2026 |
| Phase Electrical (Sussex) Ltd | Construction | 2024 |
| Phase Electrical Solutions Southern Ltd | Construction | 2024 |
| Phase One Fireworks Ltd | Wholesale & retail | 2020 |
| Philip Raby Limited | Wholesale & retail | 2012 |
| Philipsen Motorsport Services Ltd | Transport & logistics | 2022 |
| Phillips Builders (Chichester) Limited | Professional & scientific | 1976 |
| Phillips Builders Limited | Construction | 2018 |
| Phillips Homes Limited | Construction | 1987 |
| Philpot House Limited | Real estate | 2011 |
| Phoenix Accounting Services Limited | Professional & scientific | 2005 |
| Phoenix Cars (Sussex) Ltd | Transport & logistics | 2024 |
| Phoenix Plant Hire Sussex Ltd | Administrative & support | 2020 |
| Phoenix PM Ltd | Real estate | 2025 |
| Phoenix Small Business Services Ltd | Information & communication | 2009 |
| Phone LAB Tech Solutions Ltd | Wholesale & retail | 2026 |
| Phone Numbers Ltd | Administrative & support | 2016 |
| Phone Tech Solutions Limited | Wholesale & retail | 2024 |
| Phone-In (Distribution) Limited | Information & communication | 1995 |
| Phone-In Limited | Wholesale & retail | 2003 |
| Photo-Locations Ltd | Professional & scientific | 2010 |
| Physical Health Care Ltd | Health & social care | 2022 |
| PI Contract Services Special Projects Ltd | Construction | 2023 |
| Piazza Leisure Limited | Arts & recreation | 2004 |
| Pick Farm Machinery Limited | Agriculture & fishing | 2025 |
| Pickard Environmental Health Consultants Ltd | Professional & scientific | 2019 |
| Pickle Limited | Wholesale & retail | 2004 |
| Picsel Limited | Administrative & support | 2015 |
| Pietersen Consulting Ltd | Information & communication | 2014 |
| Pigg Media Limited | Wholesale & retail | 2012 |
| Pilates HQ Limited | Administrative & support | 2010 |
| Pilgrim Developement Limited | Real estate | 2016 |
| Pili and Kiki Ltd | Education | 2017 |
| Pilotage Clothing Ltd | Wholesale & retail | 2024 |
| PIN Holdings | Financial services | 2025 |
| Pingray Technology Ltd | Professional & scientific | 2020 |
| Pingu Consulting Limited | Professional & scientific | 2017 |
| Pinhill Limited | Real estate | 1990 |
| Pink Fern TM Ltd | Construction | 2020 |
| Pink Mango Accountants Ltd | Professional & scientific | 2018 |
| Pink Quality Plastering Ltd | Construction | 2025 |
| Pinkhr Ltd | Administrative & support | 2021 |
| Pinks Associates Limited | Professional & scientific | 2024 |
| Pinksauce Limited | Professional & scientific | 2015 |
| Pinnacle Works Ltd | Real estate | 2013 |
| Pinnacle Works Windows and Doors Limited | Wholesale & retail | 2026 |
| Pioneer Habitats Ltd | Agriculture & fishing | 2023 |
| Pipers Mead (Birdham) Residents' Management Company Limited | Administrative & support | 1999 |
| Pips Meadow Ltd | Professional & scientific | 2002 |
| Pitch Digital Publishing Limited | Professional & scientific | 2026 |
| Pitch Publishing Limited | Information & communication | 2002 |
| Pitchbase Holdings Limited | Construction | 2016 |
| Pitchbase Limited | Construction | 2007 |
| Pitlands Barns Limited | Hospitality | 2016 |
| Pixar Ltd | Administrative & support | 2024 |
| Pixel Peddler Digital Ltd | Information & communication | 2019 |
| Pixel Works Ltd | Manufacturing | 2005 |
| Pizza Concierge Ltd | Hospitality | 2022 |
| PJD Installations Ltd | Construction | 2012 |
| PJW Supplies Limited | Construction | 2020 |
| PKC Construction ( West Sussex ) Limited | Construction | 2024 |
| Plain Farming Limited | Agriculture & fishing | 2000 |
| Planet People Plants Ltd | Professional & scientific | 2020 |
| Planned Sites Limited | Real estate | 2004 |
| Planning World Limited | Information & communication | 2013 |
| Plant Made Bottles Ltd | Manufacturing | 2023 |
| Plant-Based Food Alliance UK Limited | Other services | 2021 |
| Platinum Home Care (South Coast) Limited | Health & social care | 2005 |
| Platinum Plumbing Southern Ltd | Construction | 2021 |