| Pentland Cave Limited | Real estate | 2015 |
| Percy Wiggins Ltd | Information & communication | 2025 |
| Perfect Living Sales Limited | Real estate | 2010 |
| Permia Ltd | Manufacturing | 2019 |
| Perren Property Management Limited | Real estate | 2025 |
| Perthy Properties (VR) Limited | Real estate | 2021 |
| Perthy Properties Limited | Financial services | 2020 |
| Peter Burton & Co Limited | Construction | 2000 |
| Petra Sporting Limited | Wholesale & retail | 2022 |
| PF Trans Ltd | Transport & logistics | 2019 |
| PFC Property Maintenance Ltd | Construction | 2016 |
| PFX Decorators Ltd | Construction | 2013 |
| Phase 300 Limited | Real estate | 2010 |
| PHASE2 Sales Consultancy Ltd | Information & communication | 2026 |
| Phoenix Autos Limited | Wholesale & retail | 2019 |
| Phoenix Electrical Group Limited | Construction | 2019 |
| Phoenix Place (Liverpool) Management Ltd | Real estate | 2018 |
| Photon Systems Limited | Information & communication | 2014 |
| Pink Financial Services Surrey Ltd | Financial services | 2012 |
| Pink Sunshine Ltd | Professional & scientific | 2020 |
| Piska Enterprises Ltd | Information & communication | 2018 |
| Pjf.Rigging&Access Limited | Construction | 2021 |
| PJS Building & Maintenance Ltd | Construction | 2014 |
| PKS Techno Consulting Ltd | Information & communication | 2017 |
| PL Studio London Ltd | Other services | 2020 |
| Pl&F Service Limited | Construction | 2019 |
| Plan a Health Consulting Ltd | Information & communication | 2014 |
| Planning Puzzles Ltd | Construction | 2021 |
| Platinum Standard Cleaning Ltd | Administrative & support | 2026 |
| Play Therapy Solutions Ltd | Health & social care | 2019 |
| Players Game London Ltd | Wholesale & retail | 2025 |
| PM General Building Services Limited | Construction | 2021 |
| PMK Carpentry Ltd | Manufacturing | 2019 |
| Polish Academy of Social Sciences and Humanities Ltd | Education | 2020 |
| Polish Peter.Basement-London Ltd | Construction | 2013 |
| Popoola-It Ltd | Information & communication | 2019 |
| Poros Digital Ltd | Information & communication | 2017 |
| Ppaa Retail Ltd | Wholesale & retail | 2024 |
| Pragat Properties Ltd | Real estate | 2021 |
| Pragma Steps Ltd | Professional & scientific | 2025 |
| Pragnaya Technologies Limited | Information & communication | 2014 |
| Prashraya Ltd | Real estate | 2022 |
| Precast Concrete Fencing Limited | Construction | 2014 |
| Premium Homecare Limited | Administrative & support | 2016 |
| Pricemile Ltd | Wholesale & retail | 1997 |
| Prime Ignition Ltd | Construction | 2012 |
| Prime Investments Limited | Real estate | 1997 |
| Primemartshop Ltd | Wholesale & retail | 2025 |
| Printed Presents Limited | Construction | 2016 |
| Pro Drywall Ltd | Construction | 2014 |
| Proactplan Ltd | Information & communication | 2026 |
| Process Design Consultants Ltd | Professional & scientific | 2018 |
| Prodigious Cleaners Ltd | Administrative & support | 2020 |
| Product Service Health (PSH) Ltd | Health & social care | 2016 |
| Profit Investment Services Ltd | Information & communication | 2012 |
| Progcare Limited | Information & communication | 2013 |
| Proinco Limited | Professional & scientific | 2016 |
| Project Skill Tree Ltd | Information & communication | 2022 |
| Prologue Solutions Limited | Arts & recreation | 2024 |
| Properties Spot Ltd | Construction | 2020 |
| Property Refine Ltd | Construction | 2025 |
| Prophy Dental Hygiene Ltd | Professional & scientific | 2017 |
| Propilot Limited | Wholesale & retail | 2025 |
| Propvest Capital Limited | Real estate | 2025 |
| Prospect Capital Management Limited | Real estate | 2018 |
| Prosto Construction London Ltd | Construction | 2023 |
| Proud Trowel Ltd | Construction | 2025 |
| Proxium Consultants Limited | Professional & scientific | 2023 |
| Psmz Limited | Real estate | 2016 |
| Puncturesafe Sutton Ltd | Wholesale & retail | 2019 |
| Pure Food Distributors Limited | Wholesale & retail | 2022 |
| Pure HR & Mediation Ltd | Administrative & support | 2023 |
| Pureedge Commercial Cleaning Ltd | Administrative & support | 2025 |
| Purley Oaks Pizza Ltd | Hospitality | 2026 |
| PVR Properties Limited | Real estate | 2023 |
| Pyrenees Health Care Ltd | Health & social care | 2019 |
| QI Trading Limited | Financial services | 2011 |
| QSM5 Ltd | Professional & scientific | 2024 |
| Quadruple R Garden Ltd | Administrative & support | 2016 |
| Quality Kiwi Carpentry Ltd | Construction | 2023 |
| Quality Painting & Decorating Services Ltd | Construction | 2017 |
| Qualysis Consultancy Ltd | Information & communication | 2011 |
| Quantam Consultancy Ltd | Professional & scientific | 2018 |
| Quantum Architectural Designs Limited | Professional & scientific | 2012 |
| Quantum Data Engines Europe Limited | Information & communication | 2016 |
| Queerbee CIC | Information & communication | 2017 |
| Quick Pass Driving Academy Ltd | Education | 2024 |
| Quiet Services Ltd | Administrative & support | 2022 |
| Qure Services Limited | Financial services | 2020 |
| R & Y Services Ltd | Transport & logistics | 2017 |
| R and B Tiling Contractors Limited | Construction | 2021 |
| R Bashir Ltd | Wholesale & retail | 2008 |
| R C Electricool Limited | Construction | 2024 |
| R Fashion Ltd | Wholesale & retail | 2018 |
| R Lofts & Extensions Ltd | Construction | 2025 |
| R Security Systems Ltd | Administrative & support | 2020 |
| R Swan Consulting Limited | Information & communication | 2018 |
| R&A Sports Ltd | Arts & recreation | 2022 |
| R-Tec Services Ltd. | Construction | 2008 |
| R.L.E London Ltd | Construction | 2023 |