| Pelorus Capital Limited | Professional & scientific | 2016 |
| Pembroke House Accounting Limited | Professional & scientific | 2002 |
| Penleaf Limited | Professional & scientific | 2018 |
| Pentangle Furniture Ltd | Construction | 2003 |
| Peppermint Print Limited | Manufacturing | 2004 |
| Perceptive Group Ltd | Administrative & support | 2009 |
| Perceptive Recruitment Ltd | Other services | 2015 |
| Perennial Financial Management Limited | Financial services | 2002 |
| Perfect Pergolas Ltd | Wholesale & retail | 2010 |
| Pergotex Technology Ltd | Information & communication | 2008 |
| Perigord Consultancy Limited | Professional & scientific | 2016 |
| Period House Renovations Co Limited | Construction | 1998 |
| Perks Building Contractors Ltd | Construction | 2013 |
| Perks Properties Ltd | Construction | 2019 |
| Perrotts Brook Ltd | Wholesale & retail | 2026 |
| Perry Bishop Financial Services Ltd | Financial services | 2024 |
| Perry Bishop Holdings Limited | Financial services | 2024 |
| Perry Bishop Ltd | Real estate | 2006 |
| Person of Letters Ltd | Professional & scientific | 2015 |
| Personal Productivity Systems Limited | Wholesale & retail | 1995 |
| Pervasive Mobile Consulting Ltd | Professional & scientific | 2020 |
| Peter Glover Consulting Ltd | Administrative & support | 2008 |
| Peter Mckintosh Ltd | Arts & recreation | 2012 |
| Peterstow Limited | Professional & scientific | 2023 |
| Petscribers Limited | Professional & scientific | 2021 |
| Petways Limited | Transport & logistics | 2020 |
| PFS Security Systems Ltd | Administrative & support | 1996 |
| Phase Electrical Contracting (Cotswolds) Ltd | Construction | 2021 |
| Phatpress Ltd | Manufacturing | 2025 |
| PHC Capability Limited | Professional & scientific | 2025 |
| Philip Tyler Holdings Limited | Financial services | 2025 |
| Philip Tyler Plastics Limited | Financial services | 1996 |
| Philip Tyler Polymers Limited | Manufacturing | 1993 |
| Phoenix Programme Solutions Limited | Administrative & support | 2014 |
| Phone Smart Gadgets Ltd | Wholesale & retail | 2021 |
| Phonebox Gadgets Ltd | Other services | 2012 |
| Photon Surgical Systems Limited | Wholesale & retail | 2017 |
| Phronetics Limited | Professional & scientific | 2025 |
| Physical Graffiti Ltd | Professional & scientific | 2019 |
| PIA Vindex Ltd | Information & communication | 2025 |
| Pickwicks Cirencester Ltd. | Wholesale & retail | 2014 |
| Pier Architecture Limited | Professional & scientific | 2020 |
| Piller UK Limited | Manufacturing | 1975 |
| Pilot - "B" Ltd | Agriculture & fishing | 2016 |
| Pink Homes Limited | Construction | 2018 |
| Pipeline Logistics Limited | Construction | 2003 |
| Pizzeria 720 Ltd | Hospitality | 2020 |
| Plan-A Planning and Development Ltd | Administrative & support | 2009 |
| Plane Speaking Ltd | Education | 2014 |
| Planning NET Zero Limited | Professional & scientific | 2024 |
| Platypus Rights Limited | Real estate | 2010 |
| PLP Building Development Limited | Construction | 2017 |
| Plus Design Ltd | Information & communication | 2003 |
| Plus Love Ltd | Information & communication | 2021 |
| PMG (Plastronic) Limited | Wholesale & retail | 1998 |
| Point a Media Limited | Information & communication | 2024 |
| Polar Vortex Limited | Wholesale & retail | 2014 |
| Polo Events (Cirencester) Ltd | Hospitality | 2014 |
| Polydron Educational Advantage Holdings Limited | Financial services | 2025 |
| Polydron IP Holding Company Ltd | Other services | 2014 |
| Polydron UK Limited | Other services | 1986 |
| Polydynamic International Limited | Professional & scientific | 2005 |
| Portland Street Southampton Leasehold 57 Ltd | Real estate | 2025 |
| Portugal Golf Promotions Ltd. | Arts & recreation | 2014 |
| Portuguese Vintage Tiles Ltd | Wholesale & retail | 2013 |
| Portus and Whitton Landscape Limited | Professional & scientific | 2013 |
| Posy and Pearl Ltd | Wholesale & retail | 2024 |
| Poulton Hill Estate Limited | Manufacturing | 2011 |
| Powerful UK Limited | Wholesale & retail | 2001 |
| Powerhouse Garage Limited | Transport & logistics | 2000 |
| PPB Design Limited | Professional & scientific | 2021 |
| PQ Solutions Limited | Information & communication | 2009 |
| Praetor Consulting Limited | Professional & scientific | 2024 |
| Precision Machined Parts Ltd | Manufacturing | 2020 |
| Premium Cruises and Tours Ltd | Administrative & support | 2025 |
| Prestige Installations Malmesbury Limited | Construction | 2023 |
| Prestige Sports Cars Limited | Wholesale & retail | 2025 |
| Prestige Workforce Solutions Ltd | Construction | 2024 |
| Price Financial Planning Ltd | Financial services | 2021 |
| Prime Property & Stays Limited | Real estate | 2026 |
| Printginger Limited | Administrative & support | 2002 |
| Prior Development Limited | Information & communication | 2012 |
| Priors Court (Baunton) Limited | Hospitality | 1986 |
| Priory Energy Limited | Administrative & support | 2016 |
| Priory Homes (Belle VUE) Ltd | Construction | 2004 |
| Pritchett Farms Limited | Agriculture & fishing | 2020 |
| Pro-Tech Shocks Limited | Manufacturing | 2002 |
| Procurri Europe Lifecycle Services Limited | Wholesale & retail | 2013 |
| Progressive Farming Trust Limited | Agriculture & fishing | 1980 |
| Proinsight Holdings Ltd | Financial services | 2024 |
| Proinsight Research Limited | Professional & scientific | 2014 |
| Project NO5 Limited | Professional & scientific | 2022 |
| Project Orchid Topco Limited | Financial services | 2024 |
| Projex (UK) Limited | Construction | 1989 |
| Prolabs (UK) Limited | Wholesale & retail | 2012 |
| Prolabs Holdings Limited | Financial services | 2015 |
| Prolawn Services Limited | Administrative & support | 2019 |
| Proleisure Group Limited | Professional & scientific | 2015 |
| Proleisure Limited | Professional & scientific | 2015 |
| Proof Performance Limited | Information & communication | 2010 |