| Pippip Ltd | Professional & scientific | 2025 |
| Pixaera Inc. | | 2022 |
| Pixie Paranormal Ltd | Extraterritorial | 2025 |
| PJL Anaesthesia Limited | Health & social care | 2025 |
| Planet Consultants Limited | Professional & scientific | 2015 |
| Planpeak Limited | Real estate | 1984 |
| Plant Magic Ltd | Wholesale & retail | 2013 |
| Plashett Community Workshop CIC | Education | 2024 |
| Platanoides Consulting Ltd | Professional & scientific | 2021 |
| Playen Limited | Professional & scientific | 2022 |
| Playlab Limited | Professional & scientific | 2004 |
| Pleebles Ltd | Information & communication | 2024 |
| Plugin Boutique Limited | Information & communication | 2011 |
| Plumpton Signs Limited | Professional & scientific | 2013 |
| PMS Malton Limited | Extraterritorial | 2025 |
| Pobstar Ltd | Information & communication | 2022 |
| Podiamed Limited | Health & social care | 2002 |
| Poico Limited | Professional & scientific | 2020 |
| Point House Media Limited | Professional & scientific | 2003 |
| Pointactive Limited | Professional & scientific | 2007 |
| Pomfrey Metal Fabrications Limited | Manufacturing | 2012 |
| Pontypridd Organic Growth Limited | Real estate | 2002 |
| Pookhill Limited | Professional & scientific | 2002 |
| Poppie's Cattery Limited | Other services | 2026 |
| Portdown Development Limited | Construction | 1982 |
| Positivelives Ltd | Health & social care | 2018 |
| Potential Control Systems Ltd | Professional & scientific | 2026 |
| Pottinger Design Engineering Ltd | Professional & scientific | 2021 |
| Pouchlands (NO. 3) Management Company Limited | Households | 1998 |
| Poutiki Studio Limited | Administrative & support | 2024 |
| Powersense Systems Ltd | Information & communication | 2025 |
| POY Management Limited | Professional & scientific | 2006 |
| PPA Distribution Ltd | Wholesale & retail | 2026 |
| Practical Semiotics Limited | Professional & scientific | 2005 |
| Praico Technologies Limited | Information & communication | 2024 |
| Precision Porsche Limited | Manufacturing | 2014 |
| Preludio Ltd | Administrative & support | 2015 |
| Premier Cotswold Catering Ltd | Hospitality | 2021 |
| Premier Lewes Taxis Ltd | Transport & logistics | 2025 |
| Press Play Films C.I.C. | Professional & scientific | 2022 |
| PRESS2TALK Limited | Information & communication | 2004 |
| Primary Matters Limited | Education | 2012 |
| Prime Time Watches Limited | Wholesale & retail | 2024 |
| Prime Valocity Ltd | Professional & scientific | 2026 |
| Priory ROW Management Company Limited | Households | 2007 |
| Prison Family Support CIC | Health & social care | 2022 |
| Pro-Fitness Academy Ltd | Education | 2020 |
| Product of the Year Limited | Professional & scientific | 2003 |
| Productive-It Limited | Information & communication | 1991 |
| Professional Markets Limited | Professional & scientific | 2019 |
| Professionals UK Limited | Administrative & support | 2005 |
| Profit Launchers Limited | Information & communication | 2014 |
| Progressive Prototypes Ltd | Professional & scientific | 2018 |
| Project Glazing Limited | Construction | 2014 |
| Projects in Hand Ltd | Administrative & support | 2024 |
| Promep Ltd | Wholesale & retail | 2010 |
| Promus Capital Limited | Real estate | 2014 |
| Prop GUY Ltd | Arts & recreation | 2015 |
| Property Vision Investments Limited | Real estate | 2018 |
| Propertymakers Holdings Limited | Real estate | 2017 |
| Propertymakers Stoke Newington Limited | Real estate | 2017 |
| Prosperity Economics Ltd | Information & communication | 2026 |
| Protect OUR Place Ltd | Administrative & support | 2021 |
| Protein Corporation Ltd | Wholesale & retail | 2022 |
| Proteus Management Consultants Limited | Professional & scientific | 2000 |
| Provenance Technology Corporation | | 2025 |
| Providence Studios Management Limited | Extraterritorial | 1982 |
| PRU Utley Counselling Limited | Financial services | 2022 |
| Psychology and Wellbeing Ltd | Education | 2023 |
| Psychology Ladder Ltd | Health & social care | 2025 |
| Psychology Works Global Ltd | Professional & scientific | 2022 |
| PTJ (Sussex) Limited | Construction | 2016 |
| Publudio Consulting Ltd | Professional & scientific | 2023 |
| Puddles 1 Limited | Information & communication | 2015 |
| Puddles 3 Limited | Information & communication | 2015 |
| Puddles 4 Limited | Information & communication | 2015 |
| Puddles 5 Limited | Information & communication | 2015 |
| Puddles 7 Limited | Information & communication | 2015 |
| Puddles 8 Limited | Information & communication | 2016 |
| Pulse South Coast Ltd | Education | 2022 |
| Pumblechook Ltd | Real estate | 2020 |
| Pure Force ENG Ltd | Wholesale & retail | 2025 |
| Purple Aspire Limited | Professional & scientific | 2014 |
| Purrfect Training Ltd | Professional & scientific | 2023 |
| Purves Two Limited | Wholesale & retail | 2006 |
| Puzzle Fit Consulting Ltd | Professional & scientific | 2012 |
| Pvsv Limited | Information & communication | 2026 |
| Pyramid Educational Consultants UK, Ltd. | Education | 1998 |
| Pyrotec Fire Detection Limited | Public administration | 1994 |
| Pyrotec Fire Protection Limited | Public administration | 1996 |
| Q Mentorship Ltd | Education | 2025 |
| Quality Junction Ltd | Professional & scientific | 2015 |
| Quantum Clinic Limited | Health & social care | 2013 |
| Quest Gamify Ltd | Education | 2024 |
| R & C Wallace Ltd | Wholesale & retail | 2016 |
| R C Bradshaw Limited | Construction | 2004 |
| R&I Equine Sales Limited | Agriculture & fishing | 2025 |
| R-Trybe Ltd | Information & communication | 2024 |
| R. P. Films Ltd. | Information & communication | 2016 |
| R.A.V.E. Real and Virtual Environment Models & Systems Ltd | Information & communication | 2011 |