| Pixel Communications Limited | Professional & scientific | 2008 |
| PJ and JR Limited | Health & social care | 2007 |
| PK Infinity Ltd | Health & social care | 2026 |
| Plainmere Limited | Professional & scientific | 1991 |
| Plumpton Racecourse Limited | Arts & recreation | 1997 |
| Plus Agency Limited | Administrative & support | 2006 |
| Pmsl Limited | Hospitality | 2004 |
| Poets Corner Management Company Limited | Households | 2002 |
| Point Consultancy Limited | Real estate | 2003 |
| Polegate Trading Limited | Transport & logistics | 2025 |
| Poles Apart Stilts Company Ltd | Arts & recreation | 2003 |
| Polo Play Ltd | Information & communication | 2018 |
| Polski UK Limited | Hospitality | 2009 |
| POP Media Limited | Information & communication | 2001 |
| Port Hall Computer Solutions Limited | Information & communication | 1997 |
| Porter West Limited | Extraterritorial | 2020 |
| Portland Mortgages Limited | Construction | 1991 |
| Portobello Trading UK Limited | Wholesale & retail | 2003 |
| Portslade Garages Limited | Wholesale & retail | 1958 |
| Powder and Process Limited | Professional & scientific | 2007 |
| Powercroft (Eastbourne) Limited | Real estate | 1978 |
| PP Secretaries Limited | Extraterritorial | 2007 |
| PPM Engineers Limited | Other services | 2007 |
| PR Davis Building Contractors Limited | Construction | 2002 |
| PR Homes Direct Limited | Construction | 1999 |
| Practical Web Solutions Limited | Information & communication | 2001 |
| Pramukhraj Ltd | Real estate | 2021 |
| Premier Care Network Limited | Administrative & support | 2001 |
| Premier Catering Services Ltd | Hospitality | 2024 |
| Premier Express Hastings Ltd | Wholesale & retail | 2021 |
| Premier Polishing Limited | Professional & scientific | 2005 |
| Premier Print Solutions Limited | Manufacturing | 1998 |
| Premier Supermarket Ltd | Wholesale & retail | 2007 |
| Premier Windows, Doors and Conservatories Limited | Administrative & support | 1993 |
| Prestige Projects Limited | Administrative & support | 2007 |
| Prestige Racing Club Limited | Arts & recreation | 2007 |
| Prestige Web Marketing Limited | Information & communication | 2007 |
| Preston Bowls Club (Brighton) Limited | Arts & recreation | 1915 |
| Preview Designs Limited | Information & communication | 2003 |
| Price & Company Accountants Limited | Professional & scientific | 2005 |
| Primal Screen Limited | Information & communication | 1997 |
| Priman 2000 Limited | Information & communication | 1998 |
| Primary Welding Alloys Limited | Water & waste | 1974 |
| Primefield Limited | Extraterritorial | 2000 |
| Primrose Hill Holdings Limited | Professional & scientific | 1988 |
| Principal Window Fabrications Limited | | 1986 |
| Print Matters Limited | Manufacturing | 2004 |
| Printified Limited | Wholesale & retail | 2018 |
| Printmark Limited | Administrative & support | 2003 |
| Pristine Maintenance Limited | Administrative & support | 2000 |
| Products for Humans Ltd | Professional & scientific | 2013 |
| Professional Lighting and Sound Association Limited | Arts & recreation | 1989 |
| Project Completion Limited | Wholesale & retail | 1987 |
| Property Care Builders and Decorators Limited | Construction | 2006 |
| Property NW Limited | Administrative & support | 2007 |
| Protea Enterprises Limited | Wholesale & retail | 2004 |
| Proteus (Packaging Systems) Limited | Administrative & support | 1997 |
| Proteus (Technical Services) Limited | Construction | 2003 |
| Provincial Conservatories Limited | Professional & scientific | 1987 |
| Provincial Corporation Limited | Professional & scientific | 1987 |
| Provincial Designs Limited | Extraterritorial | 1983 |
| Provincial Home Improvements Limited | Extraterritorial | 1983 |
| Provincial Windows Limited | Construction | 1980 |
| Proworx Media Limited | Professional & scientific | 2001 |
| Proxima Diagnostics Limited | Wholesale & retail | 2022 |
| Pulse Hub Limited | Professional & scientific | 2006 |
| Pura Aventura Limited | Hospitality | 1999 |
| Pura Bathrooms Limited | Manufacturing | 2004 |
| Pure Abodes Property Services Ltd | Hospitality | 2019 |
| Purnell Accountants Limited | Professional & scientific | 2000 |
| Putting Learning First Limited | Extraterritorial | 2000 |
| Qualisea Fish Restaurant Limited | Hospitality | 2005 |
| Qualities of Sweden Limited | Extraterritorial | 1995 |
| Quartus Limited | Professional & scientific | 2007 |
| Quay Business Solutions Limited | Professional & scientific | 2003 |
| Quayside Kitchen Ltd | Hospitality | 2022 |
| Queenbarn Limited | | 1977 |
| Quickstep Holdings Limited | Professional & scientific | 1985 |
| Quickstep Investments Limited | Extraterritorial | 1985 |
| Quoteselect Limited | | 1987 |
| R & C Pain Limited | Administrative & support | 2003 |
| R & I Builders (South East) Limited | | 1988 |
| R a Huggett Limited | Administrative & support | 2007 |
| R P Media Limited | Extraterritorial | 1996 |
| R. Brown Stone Limited | Manufacturing | 2006 |
| R. E. M. Construction Limited | Construction | 2005 |
| R. V. Young Limited | Construction | 1973 |
| R.A.D.S. Plumbing and Heating Limited | | 1984 |
| R.C.Ward and SON Limited | Construction | 1985 |
| R.E.C. Engineering Limited | Professional & scientific | 2004 |
| R.H. Davies (Southern) Limited | Construction | 1973 |
| R.H. Davies Investments Limited | Professional & scientific | 1942 |
| R.J.S. Property Limited | Real estate | 2002 |
| R.N. French Limited | Wholesale & retail | 1973 |
| R.W. Green Limited | Administrative & support | 2000 |
| Radica Broadcast Systems Limited | Manufacturing | 1993 |
| Radmall Consultancy Ltd | Professional & scientific | 2024 |
| Rager & Roberts Limited | Real estate | 2008 |
| Raggs Boutique Limited | Wholesale & retail | 2003 |
| Railway Moulds & Systems Ltd | Professional & scientific | 1991 |