| Platinum Paving & Driveways Ltd | Administrative & support | 2021 |
| Platinum Seven Ltd | Administrative & support | 2017 |
| Platinum Software Services Ltd. | Real estate | 2007 |
| PLD Contractors Limited | Construction | 2022 |
| Plot Spotter Ltd | Real estate | 2015 |
| PLS International Tech Limited | Professional & scientific | 2018 |
| Pluggers Software Ltd | Information & communication | 2018 |
| Plumbingpioneers Ltd | Construction | 2022 |
| Plush Pooches (Ruislip) Limited | Other services | 2019 |
| Pluto Business Solutions Ltd | Real estate | 2019 |
| PM Building Limited | Construction | 2009 |
| PM Consulting and Representation Ltd | Professional & scientific | 2022 |
| PM Project Management Ltd | Professional & scientific | 2021 |
| Pm&C UK Ltd | Wholesale & retail | 2011 |
| PMB Paving & Landscapes Limited | Construction | 2015 |
| PMC Roofing Limited | Construction | 2022 |
| PMG Growth International Co., Ltd | Wholesale & retail | 2024 |
| PMO DC Services Ltd | Administrative & support | 2024 |
| PMO Matters Ltd | Wholesale & retail | 2019 |
| PMP Friends Ltd | Wholesale & retail | 2021 |
| PMU Pros Limited | Education | 2021 |
| Pods Global Limited | Professional & scientific | 2011 |
| Polarr Technology Ltd | Information & communication | 2018 |
| Pole Star 1 Limited | Real estate | 2022 |
| Poly 1 Ltd | Wholesale & retail | 2014 |
| Polyus Capital Limited | Other services | 2020 |
| Pomar Property Investments Limited | Real estate | 2024 |
| POP & POP Engineering Ltd | Construction | 2014 |
| Popewood Limited | Real estate | 2022 |
| Popjoy Entertainment Ltd | Wholesale & retail | 2026 |
| Portland Gate Estates Limited | Real estate | 1989 |
| Potfix - Pothole and Road Repairs Ltd | Construction | 2021 |
| Pottinger Hind Ltd | Professional & scientific | 2019 |
| Pound Lane Holdings Limited | Real estate | 2024 |
| Powar Properties Limited | Real estate | 2021 |
| Power Signalling Ltd | Professional & scientific | 2025 |
| Powerhose Technical Ltd | Manufacturing | 2018 |
| Powerhouse Investments Global Limited | Real estate | 2022 |
| Powerline Systems Limited | Information & communication | 1991 |
| PPB Consulting Ltd | Construction | 2022 |
| PR Admin Ltd | Real estate | 2025 |
| PR Brown Limited | Information & communication | 2016 |
| Praaha Ltd | Arts & recreation | 2025 |
| Practical M&E Solutions Ltd | Construction | 2026 |
| Practical Trade Limited | Wholesale & retail | 2025 |
| Practice Smiling | | 2010 |
| Precision Dynamics Ltd | Wholesale & retail | 2025 |
| Preloved Mode Ltd | Manufacturing | 2019 |
| Premi Air and Accommodation Ltd | Administrative & support | 2020 |
| Premier Decor Solutions Limited | Construction | 2018 |
| Premier Decorations Limited | Wholesale & retail | 1988 |
| Premier Distributors Limited | Extraterritorial | 1988 |
| Premier Retail Group Ltd | Wholesale & retail | 2021 |
| Premier Tuition London Ltd | Education | 2024 |
| Premium Bulgarian Wine Ltd | Wholesale & retail | 2016 |
| Premium Soft Serve Limited | Hospitality | 2016 |
| Premiumkey Limited | Information & communication | 2019 |
| Premrise Motors Limited | Information & communication | 1990 |
| Prestige EV Ltd | Construction | 2024 |
| Prestigious Property Ltd | Real estate | 2014 |
| Pretty Good Ideas Ltd | Information & communication | 2019 |
| Pretty Perfect Pictures (UK) Limited | Information & communication | 2021 |
| Pricebuy Limited | Professional & scientific | 1990 |
| Prija UK Ltd | Wholesale & retail | 2020 |
| Prijaa UK Ltd | Wholesale & retail | 2024 |
| Prime Assist Group Ltd | Financial services | 2025 |
| Prime Car Group Ltd | Wholesale & retail | 2024 |
| Prime Empire Ltd | Wholesale & retail | 2024 |
| Prime Facilities & Management Ltd | Administrative & support | 2026 |
| Prime FX Limited | Education | 2019 |
| Prime Gibraltar Ltd | Wholesale & retail | 2020 |
| Prime Roofing & General Building Limited | Construction | 2022 |
| Prime Seat Limited | Manufacturing | 2024 |
| Primeapps Ltd | Information & communication | 2025 |
| Primum Property Ltd | Construction | 2019 |
| Print Simplex Ltd | Manufacturing | 2019 |
| Printnado 3D Ltd | Manufacturing | 2024 |
| Priop Limited | Professional & scientific | 2025 |
| Priority Clean Ltd | Administrative & support | 2025 |
| Priority Roofing & Building Design Limited | Construction | 2025 |
| Priors Consultancy Limited | Professional & scientific | 2017 |
| Priory 26 Ltd | Real estate | 2024 |
| Prism Paradise Ltd | Wholesale & retail | 2024 |
| Pritchard Developments Limited | Construction | 2017 |
| Privaseer Limited | Information & communication | 2026 |
| Private International Limited | Wholesale & retail | 2023 |
| Privilege Property Group Limited | Real estate | 2025 |
| Priya Jayaprakash Limited | Wholesale & retail | 2021 |
| Pro - Plumbing & Heating Maintenance Ltd | Construction | 2020 |
| Pro AVN Limited | Information & communication | 2018 |
| Pro Building & Roofing Limited | Construction | 2023 |
| Pro Style Barbers Co. Ltd | Other services | 2018 |
| Pro System Services Limited | Professional & scientific | 2015 |
| Pro-Heating & Plumbing Limited | Construction | 2015 |
| Pro-Pave Services Limited | Administrative & support | 2025 |
| Pro-Shield UK Roofing Ltd | Construction | 2026 |
| Pro-Style Home Improvements Ltd | Construction | 2011 |
| Probyn Investments Ltd | Real estate | 2021 |
| Prochem INT Ltd | Wholesale & retail | 2019 |
| Proconsultations Limited | Extraterritorial | 2013 |