| Parkerrose Interiors Ltd | Construction | 2016 |
| Parkside Caravan Sales Limited | Wholesale & retail | 2025 |
| Parkside Getaways Limited | Hospitality | 2025 |
| Parmentier Arthur Corporate Finance Limited | Administrative & support | 1978 |
| Parmentier Arthur Group Limited | Financial services | 1975 |
| Parmentier Arthur Valuation Services Limited | Professional & scientific | 1989 |
| Part Property Limited | Real estate | 2016 |
| Partners in Property (U.K.) Limited | Real estate | 1997 |
| Pastak Systems Ltd | Wholesale & retail | 2026 |
| Patchwork Jacket Ltd | Hospitality | 2025 |
| Paul Haynes Driving Services Ltd | Transport & logistics | 2019 |
| Pause for HER Limited | Other services | 2026 |
| PD Safety Consulting Limited | Professional & scientific | 2022 |
| PE & ST Properties Limited | Real estate | 2020 |
| PE Marina Limited | Other services | 2020 |
| Peachy Print Ltd | Manufacturing | 2014 |
| Peachy's JTC Ltd | Other services | 2026 |
| Peak Data Solutions Ltd | Information & communication | 2025 |
| Peak-M Investments Ltd | Real estate | 2025 |
| Peartree Farm Properties Limited | Households | 2020 |
| PEB Plumbing & Heating Ltd | Construction | 2026 |
| Pebbles Tea Room Ltd | Hospitality | 2026 |
| Pednolver Management Limited | Hospitality | 2015 |
| Pencroft Property Ltd | Construction | 2020 |
| Penguin Swimming Pools Limited | Construction | 2023 |
| Penlaw Limited | Professional & scientific | 2013 |
| Pennies From Heaven Limited | Hospitality | 2025 |
| Penwend Ltd | Real estate | 2021 |
| Penwith Galleries Limited | Arts & recreation | 1972 |
| Perkins & Co. UK Ltd | Financial services | 2025 |
| Permisha Limited | Construction | 2015 |
| Peterborough Crane Hire Ltd | Administrative & support | 2015 |
| Peterborough Northern Star Football Club Limited | Arts & recreation | 2009 |
| Peters Developments Limited | Construction | 2015 |
| Peters Electrical Services (Cambridge) Limited | Construction | 2011 |
| Philip Helliar Limited | Other services | 2002 |
| Phoenix Sales Ltd | Wholesale & retail | 2026 |
| Pidley Fencing Ltd | Construction | 2024 |
| Pilchard Press Cottage Ltd | Hospitality | 2024 |
| Pinkways Catering Limited | Hospitality | 2010 |
| Pinnacle Building Maintenance Ltd | Construction | 2015 |
| Pinner Properties Ltd | Real estate | 2018 |
| Pivotal Pond Ltd | Construction | 2019 |
| PJC Business Services Limited | Professional & scientific | 2024 |
| PJK Engineering Consultancy UK Ltd | Real estate | 2023 |
| Planpoint Technology Limited | Wholesale & retail | 2022 |
| Planther Ltd | Information & communication | 2026 |
| Plaza Leasehold Limited | Real estate | 2016 |
| Poleszak Ltd | Transport & logistics | 2019 |
| Police Firearms Officers Association Ltd | Administrative & support | 2010 |
| Pollard Services (2001) Limited | Water & waste | 2001 |
| Poltreen Mews Management Ltd | Real estate | 2021 |
| Porthia Consultants Ltd | Administrative & support | 2021 |
| Porthia Group Limited | Financial services | 1992 |
| Porthia Homes Limited | Construction | 2014 |
| Porthia Land Investments Ltd | Real estate | 2015 |
| Porthia Properties Limited | Real estate | 2016 |
| Porthminster Beach View Ltd | Construction | 2011 |
| Porthminster Court Residents Association Limited | Households | 1999 |
| Portland Apartments Limited | Households | 1978 |
| Portman Knight Ltd | Professional & scientific | 2021 |
| Positive Retirement Planning Limited | Financial services | 2015 |
| Post Perfection Limited | Professional & scientific | 2024 |
| Powerpoint Ltd | Construction | 2011 |
| PPF Education Limited | Information & communication | 2024 |
| PPS Distribution Ltd | Administrative & support | 2012 |
| PR Assets Limited | Real estate | 2024 |
| Praed Place Management Company Limited | Households | 2006 |
| Praetonic UK Ltd | Arts & recreation | 2017 |
| Prax Design Ltd | Construction | 2020 |
| Prax Engineering Ltd | Information & communication | 2019 |
| Prax Market Limited | Wholesale & retail | 2025 |
| Precept MK Ltd | Real estate | 2007 |
| Preece Meats Limited | Wholesale & retail | 2014 |
| Premia Professional Limited | Information & communication | 2014 |
| Prestige Car Storage Limited | Transport & logistics | 2018 |
| Prestige Flat Roofing Ltd | Construction | 2025 |
| Prestige Motor Racing Limited | Arts & recreation | 2024 |
| Prestige Transport Taxi Limited | Transport & logistics | 2024 |
| Price Mason Limited | Other services | 2025 |
| Prima Plumbing & Heating Ltd | Construction | 2006 |
| Primary Sports Stars Cambridge Limited | Education | 2021 |
| Primary Sports Stars Franchise Ltd | Education | 2022 |
| Printmakersuk.Com Ltd | Other services | 2013 |
| Printpapa (UK) Limited | Administrative & support | 2011 |
| Prism Electronics Manufacturing Ltd | Manufacturing | 2024 |
| Pro Drywall FIX Ltd | Construction | 2023 |
| Pro Health & Care Ltd | Health & social care | 2015 |
| Procurecomm Limited | Professional & scientific | 2025 |
| Productivv Energy Limited | Professional & scientific | 2021 |
| Progressive Equity Limited | Construction | 2025 |
| Progressive Skin Limited | Other services | 2023 |
| Prologic Software Ltd | Information & communication | 2023 |
| Propco Sawtry Ltd | Households | 2025 |
| Propcomm Consultancy Limited | Professional & scientific | 2020 |
| Properties Local Ltd | Real estate | 2023 |
| Property 86 Limited | Real estate | 2019 |
| Property Air Group Ltd | Real estate | 2024 |
| Propertysure South West Limited | Real estate | 2017 |
| Protectrm Ltd | Professional & scientific | 2023 |