| Paradise Street Limited | Households | 1994 |
| Parish Tree Surgery Limited | Administrative & support | 2025 |
| Parish Utilities Ltd | Administrative & support | 2025 |
| Park Gate (Burnham) Management Company Limited | Households | 1987 |
| Park House Solutions Ltd | Information & communication | 2015 |
| Park Road & Park Avenue Limited | Households | 2016 |
| Parks Properties Reading Limited | Real estate | 2022 |
| Parkstone Developments (South) Limited | Construction | 2020 |
| Parkstone Estates (South) Limited | Real estate | 2009 |
| Participant UK Limited | Information & communication | 2007 |
| Partner Made Consultancy Limited | Professional & scientific | 2018 |
| Partners Financial Services Limited | Financial services | 2021 |
| Partnership SPV 1 Limited | Professional & scientific | 2015 |
| Pascall Interiors Ltd | Construction | 2016 |
| Pask and Pask Limited | Financial services | 2019 |
| Path to Change Limited | Information & communication | 2015 |
| Pathfinder CPC Limited | Professional & scientific | 2018 |
| Pathocare Limited | Health & social care | 2011 |
| Pathway Consultants Limited | Construction | 2013 |
| Patten ASH Productions Ltd | Information & communication | 2018 |
| Paul Anderson Golf Limited | Arts & recreation | 2008 |
| Paul Coulson & Associates Ltd | Professional & scientific | 2022 |
| Paul Wallis Ltd | Professional & scientific | 2015 |
| Pavilion Umbrella Ltd | Administrative & support | 2022 |
| Pavone Properties Ltd | Real estate | 2019 |
| PAW MED Ltd | Manufacturing | 2024 |
| PB Culley Building Services Ltd | Construction | 2020 |
| PB Finance Solutions Limited | Professional & scientific | 2025 |
| PBR Berkshire Ltd | Construction | 2018 |
| PDE Europe Limited | Wholesale & retail | 2002 |
| PDW Fdservices Limited | Professional & scientific | 2009 |
| PE Mechanical Ltd | Construction | 2022 |
| Peach END Ltd | Real estate | 2023 |
| Peach Estates(Uk) Ltd | Real estate | 2025 |
| Peachey Landworks Ltd | Administrative & support | 2026 |
| Peacock House Interiors Limited | Wholesale & retail | 2020 |
| Peak Performance (Southern) Ltd | Professional & scientific | 2020 |
| Pearcesport Ltd | Information & communication | 2013 |
| Pearls of the Orient (Wholesale) Limited | Wholesale & retail | 2009 |
| Pearls of the Orient Online Limited | Wholesale & retail | 2011 |
| Peatmore Limited | Households | 1993 |
| Pecata Care Limited | Health & social care | 2025 |
| Pecata Limited | Financial services | 2024 |
| Pecg Limited | Professional & scientific | 2013 |
| Peddle Car Ltd | Wholesale & retail | 2020 |
| Pedro USS Limited | Administrative & support | 2013 |
| Pegasus Acquisitions Ltd | Real estate | 2025 |
| Pegasus FPA Ltd | Wholesale & retail | 2017 |
| Peking Chef Wokingham Ltd | Hospitality | 2016 |
| Pekkish Ltd | Information & communication | 2022 |
| Pekkle Tech Services Limited | Information & communication | 2025 |
| Pemberley Accounting Services Limited | Professional & scientific | 2009 |
| Pemberley Solutions Limited | Professional & scientific | 2013 |
| PEN Stroke Creative Ltd | Information & communication | 2016 |
| Pendorsed Ltd | Information & communication | 2022 |
| Penfold Prints Limited | Wholesale & retail | 2020 |
| Peng Properties Limited | Real estate | 2017 |
| Penlee Residents Management Company Limited | Households | 1973 |
| Penniston Taverns Ltd | Hospitality | 2026 |
| Penumbra Fitness Ltd | Arts & recreation | 2026 |
| Peony Property Holdings Limited | Real estate | 2019 |
| People First Collective Limited | Professional & scientific | 2025 |
| People Potential Group Ltd | Professional & scientific | 2015 |
| People Smart Solutions Limited | Administrative & support | 2022 |
| Peoplevine Inc Limited | Information & communication | 2023 |
| Peopleworking Limited | Professional & scientific | 2005 |
| Peral Ltd | Professional & scientific | 2018 |
| Percentia Finance Ltd | Professional & scientific | 2025 |
| Perception Horizon Risk Consultancy Limited | Professional & scientific | 2021 |
| Perceptive Agency Limited | Administrative & support | 2011 |
| Perceptive Investments Limited | Professional & scientific | 2018 |
| Percy Productions Limited | Information & communication | 2015 |
| Performance Aviation Limited | Education | 2024 |
| Periwinkle Productions Limited | Information & communication | 2015 |
| Permission Email Limited | Information & communication | 2021 |
| Pernel Media Limited | Information & communication | 2015 |
| Perry Mills Properties Ltd | Construction | 2020 |
| Personalised Learning Tuition and Education Sevices Ltd | Education | 2024 |
| Perspective Property Ltd | Real estate | 2013 |
| Pesswick Investments Ltd | Real estate | 2019 |
| Pesswick Limited | Professional & scientific | 2014 |
| Pestend Ltd | Administrative & support | 2022 |
| Peter Freebody & Co. Limited | Manufacturing | 2009 |
| Peter Skelton Driving School Limited | Administrative & support | 2016 |
| Petrowise Limited | Professional & scientific | 2016 |
| PFJ Developments Ltd | Construction | 2019 |
| Pgbgenterprise Ltd | Real estate | 2026 |
| PGS Medics Ltd | Health & social care | 2021 |
| Pgup Limited | Information & communication | 2018 |
| PH Prime Projects Ltd | Manufacturing | 2026 |
| Pharmaboost Ltd | Professional & scientific | 2023 |
| Pharos Emergency Response Services Ltd | Professional & scientific | 2012 |
| Pharos Risk Management Ltd | Real estate | 2024 |
| Pharos Safety Ltd | Professional & scientific | 2011 |
| Phase III Murrell Green Business Park Management Company Limited | Real estate | 2000 |
| PHB Renovations Ltd | Construction | 2024 |
| Phevos Ltd | Energy | 2015 |
| PHI Home & Garden Ltd | Administrative & support | 2014 |
| Phil O'Neil Carpentry Limited | Construction | 2019 |
| Phil Roberts Limited | Professional & scientific | 2014 |