| Praesto Landscapes Limited | Administrative & support | 2021 |
| Praetorian Homes Limited | Construction | 2023 |
| Prall & Company Limited | Real estate | 2013 |
| Prasad's Tutorials Ltd | Education | 2025 |
| Praveena Tech Kriya Limited | Information & communication | 2016 |
| Precision 4 Management Company Limited | Administrative & support | 2017 |
| Precision Explosives Ltd | Administrative & support | 2010 |
| Preemon Consultancy Ltd | Information & communication | 2011 |
| Prescription Weight Loss UK Ltd | Wholesale & retail | 2025 |
| Pressurepoint Effectiveness Services Limited | Other services | 2010 |
| Prestige Guarding Limited | Administrative & support | 2004 |
| Prestige Premises Limited | Real estate | 2022 |
| Preston Road (Tonbridge) Management Limited | Real estate | 2013 |
| PRH Consultants Ltd | Professional & scientific | 2015 |
| Pride in Consulting Limited | Professional & scientific | 2018 |
| Prime Ridge Roofing Solutions Ltd | Construction | 2025 |
| Pringle Capital Limited | Administrative & support | 2019 |
| Prism Brain Mapping International Ltd | Administrative & support | 2011 |
| Prism Brain Mapping Technologies Limited | Administrative & support | 2009 |
| Prism Brain Mapping UK LLP | | 2015 |
| Private Ophthalmology Ltd | Health & social care | 2020 |
| Privbtl Limited | Households | 2023 |
| Pro Construction Sevenoaks Ltd | Construction | 2024 |
| Proactive Inc Ltd | Information & communication | 2013 |
| Proactons Limited | Information & communication | 2016 |
| Prockter Ltd | Extraterritorial | 2020 |
| Prodemco Limited | Wholesale & retail | 1999 |
| Professional Electrical Contractors Ltd | Construction | 2023 |
| Professional Project Network (PPN) Limited | Information & communication | 2010 |
| Professor Andrew Tutt Limited | Health & social care | 2015 |
| Professor Michael Polkey Ltd | Health & social care | 2020 |
| Profile Computer Solutions Limited | Information & communication | 1996 |
| Profile Exhibitions & Events Ltd | Administrative & support | 2024 |
| Proflow Drains Ltd | Construction | 2024 |
| Programme Controls Management Limited | Professional & scientific | 2016 |
| Progressive Hire Limited | Administrative & support | 2017 |
| Prohance Limited | Manufacturing | 2000 |
| Project Beckenham Limited | Real estate | 2016 |
| Project Focused Consulting LLP | | 2012 |
| Project Partners & Developments Limited | Financial services | 2016 |
| Projected Benefit Limited | Information & communication | 2012 |
| Promeritum Developments Limited | Financial services | 2014 |
| Promeritum North Limited | Real estate | 2021 |
| Promeritum Partners Limited | Financial services | 2013 |
| Pronouns Limited | Health & social care | 2023 |
| Proper M Ltd | Real estate | 2020 |
| Properties With Land .Co.Uk Ltd | Real estate | 2026 |
| Property 1.0 Ltd | Real estate | 2024 |
| Property 2025 Ltd | Extraterritorial | 2024 |
| Property Vision Developments Limited | Real estate | 2022 |
| Prospa Beauty Limited | Wholesale & retail | 2019 |
| Prospect Court (Footscray) Limited | Households | 2015 |
| Prospect Place Management Ltd | Other services | 2009 |
| Prostrip Group Limited | Financial services | 2017 |
| Prostrip Waste Management Limited | Water & waste | 2017 |
| Protaction Limited | Health & social care | 2022 |
| Prowse & Company Limited | Professional & scientific | 1995 |
| Proxima Education Ltd | Information & communication | 2022 |
| PS Hair Extensions Limited | Other services | 2021 |
| PS Pro Official Limited | Wholesale & retail | 2022 |
| PSD Cleaning Services Ltd | Administrative & support | 2018 |
| Psdc Limited | Wholesale & retail | 2008 |
| Pssst Ltd | Wholesale & retail | 2022 |
| Psychology Pragmatics Ltd | Health & social care | 2015 |
| Psyemic Ltd | Professional & scientific | 2025 |
| PTK Ltd | Administrative & support | 2007 |
| Pukka Military Parts Limited | Wholesale & retail | 2021 |
| Pullen Estates Limited | Real estate | 1997 |
| Pullington Limited | Professional & scientific | 2026 |
| Pulserestarted Training Ltd | Other services | 2020 |
| Pumps (UK) Limited | Wholesale & retail | 2002 |
| Pumps (UK) Online Limited | Wholesale & retail | 2004 |
| Pumps UK Products Limited | Wholesale & retail | 2014 |
| Punchy Ltd | Administrative & support | 2016 |
| Purdie Gallery Ltd | Wholesale & retail | 2002 |
| Pure Force Ltd | Wholesale & retail | 2025 |
| Pure Peace Ltd | Manufacturing | 2017 |
| Puretech Water Systems (UK) Limited | Other services | 2012 |
| Purna Consultancy Ltd | Information & communication | 2024 |
| Purple Asset Management Limited | Construction | 2001 |
| Purple Gecko Software Ltd | Information & communication | 2006 |
| Purple Media Holdings Ltd | Information & communication | 2024 |
| Purple Media Solutions Limited | Information & communication | 2006 |
| Push ME Limited | Administrative & support | 2024 |
| Puxted Cider Limited | Manufacturing | 2017 |
| Q-Tec Resin Flooring Specialist Limited | Construction | 2025 |
| QA Consultancy (Henham) Limited | Professional & scientific | 2011 |
| Qaimew Limited | Wholesale & retail | 2022 |
| QFD Ltd | Extraterritorial | 2004 |
| QKL Anaesthetic Services Limited | Health & social care | 2025 |
| Quality Mark Roofing Limited | Construction | 2024 |
| Quantum Legal Costs Consultants Limited | Professional & scientific | 2002 |
| Quantum Property Consulting Limited | Construction | 2025 |
| Quarry & Skinners Limited | Real estate | 2021 |
| Quarry Wood LLP | | 2007 |
| Quebec Mansions Limited | Households | 2011 |
| Quercus Entertainment Limited | Real estate | 2010 |
| Quercus Leisure Limited | Real estate | 2010 |
| Quercus Logistics Limited | Professional & scientific | 2016 |
| Quercus Partners Limited | Real estate | 2009 |