| Prestige Fleet Servicing Limited | Wholesale & retail | 2007 |
| Prestige Homes DL Ltd | Construction | 2026 |
| Prestige Paving and Construction Ltd | Construction | 2025 |
| Prestige Professional Cleaning Ltd | Administrative & support | 2026 |
| Prevention Software Limited | Administrative & support | 2009 |
| Price Protection Limited | Professional & scientific | 2020 |
| Price Systems Limited | Information & communication | 1990 |
| Pride Wholesale Ltd | Wholesale & retail | 2021 |
| Priestly Creations Limited | Wholesale & retail | 2019 |
| Prigara Trading Ltd | Wholesale & retail | 2011 |
| Prime Asbestos Consultancy Limited | Water & waste | 2015 |
| Prime Improvements Home and Garden Ltd | Construction | 2021 |
| Prime Vision Plus Basingstoke Ltd | Health & social care | 2017 |
| Principle 383 Ltd | Real estate | 2021 |
| Prinnycare Limited | Health & social care | 2023 |
| Priority Groups Consulting Ltd | Professional & scientific | 2026 |
| Priory Consulting Ltd | Professional & scientific | 2026 |
| Priscience Academy Limited | Education | 2025 |
| Prisun Consulting Ltd | Professional & scientific | 2011 |
| Private Paediatrics Limited | Health & social care | 2015 |
| Privet Capital CPS LP | | 2021 |
| Privet Capital GP4 Limited | Financial services | 2020 |
| Privet Capital GP4P LLP | | 2020 |
| Privet Capital LP4 Limited | Financial services | 2020 |
| Privilege Consulting Limited | Information & communication | 2008 |
| Pro BIZ Internal Audit Services Ltd | Professional & scientific | 2025 |
| Pro Climbing League Ltd. | Arts & recreation | 2021 |
| Pro-Tech Auto Specialists Ltd | Wholesale & retail | 2010 |
| Proactive Fire Solutions Ltd | Administrative & support | 2015 |
| Procera Contract Flooring Ltd | Construction | 2009 |
| Process Design Services Limited | Professional & scientific | 2007 |
| Process Evolve Ltd | Professional & scientific | 2023 |
| Process Vision Ltd | Manufacturing | 2016 |
| Procover Roofing Ltd | Construction | 2018 |
| Prodecor Ltd | Construction | 2024 |
| Prodigy Dance Events Ltd | Hospitality | 2025 |
| Profectus Digital Limited | Information & communication | 2019 |
| Profertility Limited | Health & social care | 2021 |
| Professional Workwear Limited | Administrative & support | 2023 |
| Profuel Services Ltd | Manufacturing | 2011 |
| Project 4 Events Ltd | Information & communication | 2010 |
| Projected Image Limited | Administrative & support | 2005 |
| Projekt Navigation Ltd | Professional & scientific | 2020 |
| Projexe Solutions Limited | Professional & scientific | 2007 |
| Promar International Limited | Agriculture & fishing | 1994 |
| Promark Promotions Limited | Administrative & support | 2000 |
| Proof Construction Limited | Construction | 2019 |
| Property Applications Limited | Construction | 2010 |
| Property Investco Europe Ltd | Real estate | 2025 |
| Property Ladder Kenya Ltd | Transport & logistics | 2011 |
| Property Revive Ltd | Construction | 2024 |
| Property Security Group Limited | Administrative & support | 2020 |
| Propertyshire Ltd | Real estate | 2023 |
| Proptyx Limited | Real estate | 2024 |
| Proskate Limited | Wholesale & retail | 2000 |
| Prosperty Limited | Extraterritorial | 2013 |
| Protea Care & Beauty Ltd | Health & social care | 2025 |
| Proteus Theatre Company Limited | Arts & recreation | 1983 |
| Proteus Theatre Company Productions Ltd | Arts & recreation | 2011 |
| Protrak Ltd | Information & communication | 2024 |
| Proud Care Devon Limited | Health & social care | 2025 |
| Proud Care Limited | Professional & scientific | 2022 |
| Provital Care Ltd | Health & social care | 2025 |
| Prowavmastering Ltd | Information & communication | 2024 |
| Proway Marketing Ltd | Administrative & support | 2015 |
| Prowess Developments Ltd | Construction | 2022 |
| PRT Lighting Ltd | Construction | 2026 |
| PS Infosystems Limited | Information & communication | 2014 |
| PS Luxury Home Ltd | Real estate | 2025 |
| PSG7 Consulting Ltd | Information & communication | 2019 |
| PSK Publishing Limited | Information & communication | 2026 |
| PSK Storage Solutions Ltd | Manufacturing | 2021 |
| PSL Retail Ltd | Wholesale & retail | 2025 |
| PSP Controls Ltd | Administrative & support | 2018 |
| PSR Developments Limited | Real estate | 2002 |
| PST11 Ltd | Transport & logistics | 2023 |
| Public Space Ltd | Arts & recreation | 2023 |
| Publicanus Information Security Limited | Information & communication | 2018 |
| Pugo Systems UK Limited | Information & communication | 2017 |
| Pullen K Limited | Wholesale & retail | 2021 |
| Pulse and Bar Media Limited | Information & communication | 2014 |
| Pulse Finance Limited | Financial services | 2013 |
| Pulse Group of Companies Limited | Financial services | 2025 |
| Pulse Invoice Finance Limited | Administrative & support | 2011 |
| Pumpkin Theatre Productions Limited | Arts & recreation | 2017 |
| Pumptech Services Limited | Wholesale & retail | 2012 |
| Pure Air Conditioning Ltd | Energy | 2017 |
| Pure Dental Practice Ltd | Health & social care | 2012 |
| Pure Guidance Limited | Health & social care | 2015 |
| Pure H2O Window Cleaning Ltd | Extraterritorial | 2009 |
| Purecontent Marketing Ltd | Professional & scientific | 2026 |
| Purekeys UK Limited | Wholesale & retail | 2024 |
| Purewave Distributors Ltd | Wholesale & retail | 2025 |
| Purple Birch Healthcare Limited | Administrative & support | 2023 |
| Purple Dragon IT Limited | Information & communication | 2002 |
| Purple Homes Ltd | Real estate | 2024 |
| Purple Stitches Limited | Wholesale & retail | 2016 |
| Purple Vogue Ltd | Households | 2025 |
| Puru Solutions Limited | Information & communication | 2026 |
| PVC Brothers Ltd | Manufacturing | 2021 |