| PAT Garrett Liquor Trading Company Limited | Manufacturing | 2018 |
| Patrick Taylor Mediation Ltd | Professional & scientific | 2012 |
| Patrishchin Limited | Health & social care | 2019 |
| Paul Brown Transport Services Limited | Transport & logistics | 2023 |
| Paul Martyn Properties Limited | Real estate | 2005 |
| Paul Sargent Shoes Limited | Manufacturing | 2020 |
| Paxton Software Ltd | Information & communication | 1979 |
| Paymymove Ltd | Transport & logistics | 2021 |
| PB Fuel Limited | Wholesale & retail | 2024 |
| Pebo DEC Ltd | Construction | 2019 |
| Pedalwise Ltd | Education | 2025 |
| Pegasus Lift Truck Training Ltd | Education | 2014 |
| Pendragon Direct Limited | Extraterritorial | 2018 |
| Pendragon Financial Solutions Limited | Financial services | 2012 |
| Pendragon Mortgages Limited | Extraterritorial | 2018 |
| Pendragon Property Rentals Ltd | Real estate | 2023 |
| Perfect Promotional Products Limited | Professional & scientific | 2009 |
| Performance Bike Solutions Ltd | Wholesale & retail | 2023 |
| Perpetuum Holdings Ltd | Real estate | 2025 |
| Perpetuum Investments Limited | Real estate | 2025 |
| Personalisation Matters (ALL About YOU) Ltd | Health & social care | 2018 |
| Peteaconie Ltd | Wholesale & retail | 2026 |
| Peter Tomas Company Ltd | Construction | 2006 |
| Petro Hub Limited | Wholesale & retail | 2020 |
| Pgkec Ltd | Professional & scientific | 2013 |
| Phoenix Electronics Limited | Professional & scientific | 1994 |
| Phoenix Group Marketing Ltd | Wholesale & retail | 2026 |
| Phoenix Total HR Solutions Ltd | Administrative & support | 2024 |
| Photography by Anna Kingji Ltd | Professional & scientific | 2023 |
| Physarum Consulting Ltd | Professional & scientific | 2026 |
| Pinchos Bar Ltd | Hospitality | 2014 |
| Pine Groves Properties Limited | Real estate | 2024 |
| Pingme-Ai Limited | Information & communication | 2024 |
| Pink Sparkle Investments Ltd | Financial services | 2021 |
| Pipefit Services Ltd | Construction | 2017 |
| Pisarev Limited | Transport & logistics | 2025 |
| PK Pro Properties Ltd | Real estate | 2022 |
| Pkyj Sports Consult Ltd | Arts & recreation | 2026 |
| Plan Surveying Limited | Professional & scientific | 2018 |
| Plates by Kaela Ltd | Manufacturing | 2025 |
| Platinum Automation Limited | Administrative & support | 2018 |
| Platinum Insurance Solutions Limited | Financial services | 1999 |
| Plinkstore Ltd | Wholesale & retail | 2022 |
| Plymovent Limited | Manufacturing | 1978 |
| PM2 Properties Ltd | Real estate | 2020 |
| PNJ Holdings Ltd | Administrative & support | 2019 |
| Polaris Risk & Security Consultancy Ltd | Professional & scientific | 2025 |
| Pompli Limited | Wholesale & retail | 2019 |
| Positive Marketing Solutions Limited | Extraterritorial | 2009 |
| Postroom-Online Ltd | Wholesale & retail | 2002 |
| PP Investment Homes Ltd | Real estate | 2022 |
| PPH Consulting Limited | Information & communication | 2011 |
| Precise Tiling Limited | Construction | 2024 |
| Precision Europe Limited | Manufacturing | 2012 |
| Precision Testing Ltd | Manufacturing | 2024 |
| Prescott Refinements Ltd. | Wholesale & retail | 2025 |
| Prestiege Events Limited | Arts & recreation | 2019 |
| Prestige Scaffold and Access Solutions Limited | Construction | 2008 |
| Pristine Plastering and Decorating Services Ltd | Construction | 2023 |
| Pro Plumbing 24/7 Ltd | Construction | 2025 |
| Process Automation Plus Ltd | Professional & scientific | 2026 |
| Professional Spray Foam Removal Ltd | Construction | 2024 |
| Provider, Governance & Quality Solutions Ltd | Professional & scientific | 2025 |
| Pruszek Logistics Ltd | Transport & logistics | 2015 |
| Pure Mother Co. Ltd | Wholesale & retail | 2025 |
| Purely Planted Ltd | Wholesale & retail | 2025 |
| Purpose Estates Group Ltd | Construction | 2022 |
| PW Property Management and Investment Ltd | Real estate | 2024 |
| Pwtrader Ltd | Manufacturing | 2023 |
| Pyghtle Developments Limited | Construction | 1998 |
| Quantex Creations Ltd | Wholesale & retail | 2025 |
| Quantz Limited | Information & communication | 2022 |
| Qubics Financial Services Ltd | Information & communication | 2009 |
| Quickfixm&G Limited | Wholesale & retail | 2018 |
| Quickideal Limited | Real estate | 1988 |
| R and G Precision Engineering Limited | Professional & scientific | 1999 |
| R G T Electrical Limited | Construction | 2022 |
| R J Smith & SON Ltd | Wholesale & retail | 2010 |
| R P a Safety Services Ltd | Other services | 2008 |
| R Reynovations Ltd | Construction | 2023 |
| R Rickard & Associates Ltd | Information & communication | 2014 |
| R W S Northampton Limited | Administrative & support | 2007 |
| R.Chana Investments Limited | Real estate | 2024 |
| R.W.D Building & Developments Ltd | Construction | 2023 |
| Rabah Consultancy Ltd | Hospitality | 2022 |
| Raco Tech Ltd | Information & communication | 2025 |
| Rada Technology Holdings Ltd | Information & communication | 2026 |
| Radian Vale Ltd | Health & social care | 2025 |
| Radski Ltd | Transport & logistics | 2025 |
| Radu Constantin Ltd | Construction | 2022 |
| Railway Children Nursery Limited | Education | 2006 |
| Range Auto Ltd | Manufacturing | 2015 |
| Rangegrove Marketing Limited | Extraterritorial | 1983 |
| Raster Printers Ltd | Manufacturing | 2006 |
| Raunds Petrol Station Limited | Wholesale & retail | 2024 |
| Ravensden PLC | Wholesale & retail | 1975 |
| RAW Property Solutions Ltd | Real estate | 2024 |
| RBH Properties & Bloom Homes Ltd | Real estate | 2025 |
| Rdcc Shops Limited | Wholesale & retail | 2024 |
| RDI Healthcare Limited | Wholesale & retail | 2024 |