| Pitch Records Ltd | Information & communication | 2020 |
| Pitchldn Ltd | Administrative & support | 2023 |
| Pivitt Ltd | Professional & scientific | 2022 |
| Pivotal Care (Kirby Cross) Ltd | Construction | 2016 |
| Pivotal Land Limited | Professional & scientific | 2009 |
| Pivotal Property Limited | Construction | 2016 |
| Pixels Interactive Limited | Information & communication | 2025 |
| PJ Southport Ltd | Hospitality | 2018 |
| PJB Vale Limited | Real estate | 2025 |
| PJC Advisory Limited | Other services | 2021 |
| PJS Holdings Group Ltd | Professional & scientific | 2025 |
| Plainseal Limited | Real estate | 2000 |
| Plait Creative Limited | Professional & scientific | 2010 |
| Planet Mindfulness Ltd | Wholesale & retail | 2022 |
| Planning Unit Ltd. | Professional & scientific | 2011 |
| Plastic Card World Limited | Manufacturing | 2013 |
| Platinum Associates Ltd | Households | 2019 |
| Platinum Associates Trustees Ltd | Financial services | 2022 |
| Platinum Clearance Ltd | Water & waste | 2026 |
| Platinum Telecommunications Ltd | Information & communication | 2018 |
| Platonic GB Ltd | Wholesale & retail | 2017 |
| Play 2 Learn Bedford Ltd | Health & social care | 1999 |
| Play 2 Learn Day Nursery Ltd | Education | 2002 |
| Play Industries Limited | Information & communication | 2002 |
| Pleasure to Drive Ltd | Wholesale & retail | 2019 |
| Plotplan 2 Limited | Administrative & support | 2013 |
| Plotplan Limited | Construction | 2007 |
| Plumb Point (Essex) Limited | Wholesale & retail | 2011 |
| Plumbing Hack Ltd | Construction | 2022 |
| Plutus (Ipswich) Limited | Real estate | 2016 |
| PM Drylining Ltd | Construction | 2023 |
| PM Solutions (UK) Limited | Manufacturing | 2004 |
| PME Medical Facilities Management Ltd | Administrative & support | 2024 |
| PME Tech Limited | Manufacturing | 2016 |
| PME Travel Limited | Transport & logistics | 2025 |
| Pmloughton Ltd | Other services | 2024 |
| PMS (UK) Ltd | Real estate | 2012 |
| PNB Publishing Ltd | Information & communication | 2023 |
| PNR Developments Limited | Construction | 2012 |
| PNT Services Ltd | Administrative & support | 2026 |
| Pogpog & Patis Ltd. | Wholesale & retail | 2020 |
| Pointstart Limited | Construction | 2000 |
| Polaris Telecommunications Limited | Information & communication | 2003 |
| Polaris Telecoms Limited | Information & communication | 2010 |
| Polo Touch Ltd | Wholesale & retail | 2025 |
| Poplas Limited | Information & communication | 2011 |
| Port Lane Developments Limited | Administrative & support | 2023 |
| Portfolio Property Group Ltd | Real estate | 2019 |
| Portland Hotel Bar and Restaurant Ltd | Hospitality | 2018 |
| Portolan Limited | Professional & scientific | 2013 |
| Portsarch Limited | Administrative & support | 2009 |
| Portway Property Ltd | Real estate | 2022 |
| Positive Health & Consultancy Ltd | Wholesale & retail | 2021 |
| Positive Reach Limited | Professional & scientific | 2025 |
| Potter and Co. Accountants Ltd | Professional & scientific | 2014 |
| Pottery in the Park Ltd | Wholesale & retail | 2023 |
| Pover Partnership Limited | Health & social care | 2024 |
| Power-Sonic Europe Limited | Other services | 1986 |
| Powerzone Appliances Ltd | Wholesale & retail | 2024 |
| PP Group Essex Limited | Real estate | 2021 |
| PP Success Limited | Education | 2019 |
| Praisco UK Ltd | Wholesale & retail | 2024 |
| Pranam Properties Limited | Real estate | 2020 |
| PRB Management Ltd | Professional & scientific | 2016 |
| Precise Books Limited | Professional & scientific | 2021 |
| Precise Fire Protection Ltd | Public administration | 2023 |
| Precise Payroll Limited | Professional & scientific | 2021 |
| Precise Tax Limited | Professional & scientific | 2012 |
| Precision Building & Landscaping Ltd | Administrative & support | 2025 |
| Precision Laser Limited | Professional & scientific | 2011 |
| Premier Caterers Ltd | Hospitality | 2026 |
| Premier Events and Catering Limited | Hospitality | 2016 |
| Premier Functions Ltd | Hospitality | 2026 |
| Premier Motion Limited | Other services | 2023 |
| Premier RIC Limited | Construction | 2020 |
| Premises Recruitment Limited | Administrative & support | 2001 |
| Prescribing Support Ltd. | Information & communication | 2015 |
| Presidential Suite Ltd | Other services | 2025 |
| Press Parts Limited | Wholesale & retail | 2002 |
| Prestage Developments Limited | Administrative & support | 2016 |
| Prestige Car Group Ltd | Wholesale & retail | 2020 |
| Prestige Villas (Cyprus) Limited | Real estate | 2010 |
| Prestige Waste Clearance Ltd | Water & waste | 2024 |
| Pretri Limited | Real estate | 2022 |
| Priamus Ltd | Professional & scientific | 2009 |
| Primac (Ilford) Flats Limited | Real estate | 1964 |
| Prime Building & Maintenance Limited | Construction | 2021 |
| Prime Global Advisors Ltd | Professional & scientific | 2024 |
| Prime Medical Staffing Limited | Administrative & support | 2015 |
| Primeglobe Housing Foundation Ltd | Real estate | 2025 |
| Primestruction Limited | Construction | 2019 |
| Print Evolved Limited | Professional & scientific | 1997 |
| Privacy Experience Agency Limited | Information & communication | 2019 |
| Private Browser Limited | Information & communication | 2019 |
| PRK Controls Limited | Information & communication | 2018 |
| Pro Accounting Solutions Ltd | Professional & scientific | 2021 |
| Pro Contract Direct Limited | Professional & scientific | 2021 |
| Pro Contract Jobs Limited | Information & communication | 2017 |
| Pro Engineering Consultancy Services Limited | Professional & scientific | 2013 |
| Pro Finish Painting Ltd | Construction | 2014 |