| Pralita Property Ventures Ltd | Real estate | 2024 |
| Pratyush Mahapatra Limited | Real estate | 2007 |
| Precast Advanced Track Limited | Construction | 2012 |
| Precision Group Holdings Ltd | Financial services | 2020 |
| Precision Nail Supplies Ltd | Wholesale & retail | 2020 |
| Precision Nails Group Limited | Wholesale & retail | 2019 |
| Precision Nails Limited | Other services | 2019 |
| Prefa UK Ltd | Construction | 2017 |
| Premetz Limited | Administrative & support | 2005 |
| Premier Buildings Limited | Real estate | 1996 |
| Premier Car Wash & Valeting Limited | Other services | 2014 |
| Premier Electrical (UK) Ltd | Construction | 2013 |
| Premiere Flooring Ltd | Wholesale & retail | 1999 |
| Premium Kohinoor UK Trading Ltd | Administrative & support | 2026 |
| Prestige Trade Supplies Ltd | Administrative & support | 2017 |
| Primary Superstars Ltd | Professional & scientific | 2026 |
| Prime Contracts Limited | Information & communication | 2002 |
| Prime Madras Group Limited | Wholesale & retail | 2025 |
| Prime Movers Functional Fitness CIC | Health & social care | 2019 |
| Primus Medical Indemnity Limited | Financial services | 2014 |
| Princess Sales and Service (U.K.) Limited | Professional & scientific | 1984 |
| Priory Court Limited | Households | 1998 |
| Priory Developments Warwickshire Limited | Construction | 2022 |
| Priory Investments Warwickshire Limited | Real estate | 2022 |
| Priti Vikas Ltd | Health & social care | 2024 |
| PRM Wealth Management Ltd | Financial services | 2011 |
| PRM Wealth Services Ltd | Financial services | 2026 |
| Pro-Lift Solutions Limited | Other services | 2017 |
| Pro-Smart Driveway Cleaning Limited | Administrative & support | 2021 |
| Pro-Smart Window Cleaning Limited | Administrative & support | 2021 |
| Proactive Marketing and Communications Limited | Professional & scientific | 2004 |
| Probert-Walker Event Consultancy Limited | Professional & scientific | 2022 |
| Procon Wind Energy Limited | Other services | 2015 |
| Production Power Systems Ltd | Energy | 2015 |
| Productize Limited | Information & communication | 2026 |
| Profeel UK, Ltd. | Hospitality | 2025 |
| Professional Care Recruitment INT Ltd. | Administrative & support | 2012 |
| Professional Care Recruitment Limited | Administrative & support | 1999 |
| Profound Events and Hire Ltd | Administrative & support | 2026 |
| Progress and Life Limited | Financial services | 2017 |
| Progressive Parametrics Limited | Professional & scientific | 2020 |
| Prohoc Ltd | Professional & scientific | 2023 |
| Project Douglas Bidco Limited | Professional & scientific | 2024 |
| Project Douglas Topco Limited | Financial services | 2024 |
| Project Four Consulting Limited | Professional & scientific | 2009 |
| Project Four Design Limited | Manufacturing | 2018 |
| Project Restaurants Limited | Professional & scientific | 2019 |
| Project Virgam Limited | Information & communication | 2025 |
| Proline Plumbing Limited | Construction | 2016 |
| Promark Homes Ltd | Construction | 2026 |
| Promon Appsec UK Limited | Information & communication | 2023 |
| Promotional Advertising Gift Enterprises Ltd. | Information & communication | 1990 |
| Prontomas Holdings UK Limited | Financial services | 2021 |
| Propack Automation Machinery Limited | Wholesale & retail | 1981 |
| Propack Holdings Limited | Financial services | 1973 |
| Propelio Ltd | Professional & scientific | 2024 |
| Propelpaths Limited | Information & communication | 1998 |
| Propertylive Limited | Real estate | 2008 |
| Propertymark Academy Limited | Education | 2017 |
| Propertymark Client Money Protection Scheme Ltd | Other services | 2018 |
| Propertymark Estate Agents Regulation Authority Limited | Administrative & support | 2017 |
| Propertymark Ltd | Real estate | 1967 |
| Propertymark Qualifications Ltd. | Education | 2006 |
| Propertysite Limited | Real estate | 1997 |
| Prosegur Security UK Limited | Other services | 2020 |
| Prosser Homes Limited | Construction | 2002 |
| Protec Group Ltd | Professional & scientific | 2007 |
| Protect the Planet Limited | Wholesale & retail | 2010 |
| Protecting UK Business Ltd | Professional & scientific | 2025 |
| Protex Healthcare (UK) Ltd | Wholesale & retail | 2014 |
| Protogen Consulting Ltd | Professional & scientific | 2007 |
| Prova Investments Limited | Professional & scientific | 2010 |
| Prova Public Relations Limited | Administrative & support | 2000 |
| Providence Capital Management Limited | Real estate | 2006 |
| Proximity Public Relations Limited | Professional & scientific | 2019 |
| PS & HK Properties Ltd | Households | 2015 |
| Psandhu Education Consultant Ltd | Professional & scientific | 2024 |
| PSH Davis Group Limited | Professional & scientific | 2026 |
| Psychology Connections on the Coast Ltd | Health & social care | 2025 |
| Ptcl Limited | Wholesale & retail | 2015 |
| PTI Developments Limited | Construction | 2012 |
| Pudz Ltd. | Hospitality | 2011 |
| Pumpkin Bubble Ltd | Wholesale & retail | 2021 |
| Pumps and Equipment Warwick Limited | Wholesale & retail | 1983 |
| Punk Royale London Ltd | Hospitality | 2025 |
| Pure Air Ventilation Suppliers Limited | Manufacturing | 2023 |
| Pure CRM Limited | Information & communication | 2021 |
| Pure Ionic Water Limited | Water & waste | 2015 |
| Pure Plastering & Rendering Ltd | Construction | 2023 |
| Purple Community Fund | Administrative & support | 2014 |
| Purple Giraffe Ltd | Professional & scientific | 2020 |
| Purple Monster Training Limited | Administrative & support | 1996 |
| Purple Sprouting Broccoli Limited | Construction | 2000 |
| Pushing Limits Limited | Administrative & support | 2011 |
| PVM Associates Limited | Professional & scientific | 2019 |
| PWP Talent Ltd | Information & communication | 2022 |
| PXL Properties Limited | Real estate | 2007 |
| Pye-Management Ltd | Professional & scientific | 2020 |
| Q Labels Limited | Manufacturing | 2025 |
| Q&A Planning Limited | Professional & scientific | 2016 |