| Printees Project Ltd | Manufacturing | 2024 |
| Printmatch Ltd | Administrative & support | 2002 |
| Printworld Ltd | Manufacturing | 2019 |
| Prior Building and Maintenance Ltd | Construction | 2024 |
| Priory Court (Harlow) Association Limited | Households | 1974 |
| Priory Court (Southend) Residents Company Limited | Households | 1989 |
| Priory Mews (Corby) Management Limited | Households | 2021 |
| Prisoma Limited | Hospitality | 2025 |
| Private Clients Travel Ltd | Administrative & support | 2012 |
| PRM Joinery Ltd | Construction | 2024 |
| Pro Aquatic Services Ltd | Agriculture & fishing | 2024 |
| Pro Design & Construction Ltd | Construction | 2023 |
| Pro Quality Healthcare Limited | Administrative & support | 2022 |
| Procwise Ltd | Professional & scientific | 2023 |
| Prodigy Construction Ltd | Construction | 2021 |
| Professional Active Ltd | Construction | 2019 |
| Professional Advancement Limited | Education | 2024 |
| Professional Project Catering Ltd | Hospitality | 2024 |
| Profile Advertising Limited | Real estate | 1971 |
| Profit & Growth Accountants Ltd. | Professional & scientific | 2021 |
| Progmatec IT Services Limited | Information & communication | 2016 |
| Project Control Management Consultancy Ltd | Other services | 2020 |
| Project Management Surveyors Ltd | Professional & scientific | 2019 |
| Projectile Consulting Limited | Financial services | 2015 |
| Projectprose Consultancy Limited | Real estate | 2023 |
| Projekt IT Limited | Information & communication | 2013 |
| Prola Investments UK Ltd | Real estate | 2026 |
| Prolicht UK Limited | Construction | 2004 |
| Prometheus HSE Services and Training Limited | Professional & scientific | 2020 |
| Prominent Care Ltd | Administrative & support | 2016 |
| Prominent Mind CIC | Public administration | 2025 |
| Promising Healthcare Limited | Health & social care | 2017 |
| Prop Vision Ltd | Real estate | 2019 |
| Properties EA Ltd | Real estate | 2025 |
| Property by JR Limited | Real estate | 2024 |
| Property Construction Limited | Construction | 2015 |
| Property-Zz Ltd | Real estate | 2025 |
| Prospect Road Management Company Limited | Households | 1989 |
| Prosperlet Ltd | Real estate | 2025 |
| Prosperous Health Limited | Health & social care | 2023 |
| Protecht IV Limited | Wholesale & retail | 2022 |
| Protected Futures Ltd | Financial services | 2018 |
| Protecting the Human Experience CIC | Education | 2025 |
| Protein Factory Ltd | Wholesale & retail | 2019 |
| Protoset Limited | Professional & scientific | 1994 |
| Proud Penguin Limited | Manufacturing | 2021 |
| Providr (London) Ltd | Professional & scientific | 2022 |
| Prymewaste Limited | Water & waste | 2025 |
| Pryor Developments Limited | Real estate | 2003 |
| PST Pro Building Services Ltd | Construction | 2022 |
| PST Pro Sport Agency Ltd | Arts & recreation | 2023 |
| Psychological Services and Interventions Ltd | Health & social care | 2013 |
| Ptsh Ltd | Construction | 2017 |
| Publicanns Ltd | Hospitality | 2025 |
| Puckeridge Mews Residents Limited | Households | 1996 |
| Pugface Property Limited | Administrative & support | 2020 |
| Pukkaelectric Ltd | Transport & logistics | 2022 |
| Pukton Limited | Health & social care | 2024 |
| Pulangura Limited | Transport & logistics | 2018 |
| Pumaly Photo Co Ltd | Information & communication | 2025 |
| Pump & Plate London Limited | Hospitality | 2022 |
| Purcell's Court Management Company Limited | Households | 1987 |
| Purdue Performance and Motorsport Limited | Wholesale & retail | 2024 |
| Pure Drips Cleaning Limited | Administrative & support | 2013 |
| Pure Path Medical Solutions Limited | Health & social care | 2025 |
| Pure Removals Ltd | Transport & logistics | 2015 |
| Pure Surface Design Ltd | Extraterritorial | 2026 |
| Purehive Ltd | Administrative & support | 2026 |
| Puremount Marquee Ltd | Wholesale & retail | 2024 |
| Purex Healthcare Limited | Health & social care | 2024 |
| Purkinje Systems Ltd | Health & social care | 2024 |
| Purposeful Jobs Ltd | Information & communication | 2016 |
| Purser Transport Ltd | Transport & logistics | 2021 |
| Pursuit of Blue Ltd | Wholesale & retail | 2026 |
| Puttnam Building & Damp Proofing Specialists Ltd | Construction | 2024 |
| Putts Services Ltd | Construction | 2025 |
| Q a & Z Limited | Administrative & support | 2023 |
| Q1 Secretarial Services Limited | Administrative & support | 2026 |
| QAM Solutions Ltd | Information & communication | 2025 |
| Qash Franchise UK 1 Ltd | Hospitality | 2026 |
| Qash Franchise UK Ltd | Hospitality | 2026 |
| Qaweesi Ltd. | Professional & scientific | 2016 |
| Qbus Ltd | Transport & logistics | 2013 |
| QDH Cars Ltd | Wholesale & retail | 2021 |
| QDR Health Limited | Information & communication | 2022 |
| Qhealth Konsulting Ltd | Health & social care | 2025 |
| Qonex Consulting Ltd | Information & communication | 2021 |
| Qrbtech Limited | Wholesale & retail | 2024 |
| QRW RTM Company Ltd | Households | 2016 |
| Quabode Limited | Real estate | 2019 |
| Quality Advantage Consultancy Limited | Professional & scientific | 2023 |
| Quality Courts Limited | Construction | 2023 |
| Quality First Homeworks Limited | Construction | 2025 |
| Quality Outdoor Rooms Ltd | Administrative & support | 2008 |
| Quality Pack Ltd | Manufacturing | 2015 |
| Quality Service Anton Ltd | Transport & logistics | 2017 |
| Quality Tech Engineering Ltd | Construction | 2024 |
| Qualitywise Consulting Limited | Information & communication | 2016 |
| Qualitywise Property Limited | Real estate | 2020 |
| Qualuxe Limited | Wholesale & retail | 2014 |