| Phoenix Interiors (Kent) Limited | Construction | 2019 |
| Phonica Limited | Construction | 2018 |
| Phuzion Media Ltd | Professional & scientific | 2020 |
| Physics Performance LAB Ltd | Education | 2025 |
| PI Eighteen UK Limited | Real estate | 2023 |
| PI Studio International Limited | Professional & scientific | 2012 |
| Piaca Limited | Extraterritorial | 2011 |
| Pick Your Poison Limited | Administrative & support | 1998 |
| Pickering London Limited | Professional & scientific | 2022 |
| Pickle Rigging Ltd | Construction | 2025 |
| Picture Box Schools Ltd | Professional & scientific | 2008 |
| Pierark Ltd | Transport & logistics | 2010 |
| Pilates Performance Limited | Other services | 2026 |
| Pillarbox House Freehold Management Limited | Households | 2024 |
| Pilu Limited Liability Partnership | | 2013 |
| Pinewood Electrical Services Limited | Construction | 1997 |
| Pink Professor Enterprises Limited | Arts & recreation | 1999 |
| Pink Professor Intellectual Property Limited | Administrative & support | 2016 |
| Pinki Winki Limited | Real estate | 2013 |
| Pinnacle Heating Solutions Ltd | Construction | 2006 |
| Pinnacle Links Ltd | Other services | 2024 |
| Pinnacle Metal Roofing Limited | Construction | 2025 |
| Pinnacle Scaffolding Solutions Limited | Construction | 2021 |
| Pipefreezing Services Ltd. | Construction | 2012 |
| Pitman Electrical Services Ltd | Construction | 2019 |
| Pivotal Business Consulting Limited | Professional & scientific | 2024 |
| PIVOTAL4 Limited | Professional & scientific | 2018 |
| Piwai Health & Care Limited | Professional & scientific | 2026 |
| Pizza Hotland UK Ltd | Hospitality | 2025 |
| PJC Contract Services Limited | Construction | 2019 |
| PJC I Properties Limited | Real estate | 2024 |
| PJG Contractors Limited | Construction | 2002 |
| PJS TOX Consultancy Limited | Professional & scientific | 2013 |
| PJW (Kent) Ltd | Construction | 2021 |
| PKA Property Developments Limited | Construction | 2017 |
| Plainscape Limited | Construction | 2023 |
| Plant Peas Limited | Professional & scientific | 2020 |
| Platinum Consulting Group Ltd | Professional & scientific | 2021 |
| Platinum E L V Design Limited | Construction | 2002 |
| Playle & Partners LLP | | 2006 |
| Playmaker Technology Limited | Information & communication | 2016 |
| Playmore Consultancy Ltd | Construction | 2022 |
| Pleszak Physical Health Ltd | Other services | 2023 |
| PLOS4 Properties Solutions Limited | Real estate | 2022 |
| Plot Angels Ltd | Real estate | 2018 |
| Plot Developments Ltd | Real estate | 2025 |
| Plsts Ltd | Administrative & support | 2025 |
| Plumbing Hand Ltd | Construction | 2019 |
| Plumbpride Sidcup Limited | Administrative & support | 2024 |
| PMC Recruitment Ltd | Administrative & support | 2019 |
| Podiatry Plus Gold Ltd | Health & social care | 2021 |
| Pointer Control Systems (UK) Limited | Professional & scientific | 2011 |
| Poise Investments Limited | Financial services | 2022 |
| Polaris Building Services Limited | Construction | 2019 |
| Pontcanna Development Ltd | Real estate | 2009 |
| Pop's Property Limited | Real estate | 2023 |
| Portland Contracts Limited | Construction | 2003 |
| Posh Hand Car Wash Ltd | Administrative & support | 2024 |
| Positive Journeys CIC | Education | 2026 |
| Post Properties 2 Limited | Real estate | 2021 |
| Post Properties Limited | Other services | 2016 |
| Posypie Music Limited | Administrative & support | 2019 |
| Potter Electrical Services Limited | Construction | 2011 |
| Povey Accountants Limited | Professional & scientific | 2009 |
| Povey Little Accountancy Services Limited | Professional & scientific | 2011 |
| Povey Little CA Limited | Professional & scientific | 1998 |
| Povey Little Limited | Professional & scientific | 2012 |
| Povey Little Management Limited | Professional & scientific | 2011 |
| Povey Little PSA Limited | Professional & scientific | 2016 |
| Povey Little Secretaries Limited | Administrative & support | 1994 |
| Povey Little Services Limited | Construction | 2018 |
| Povey Little Sidcup Limited | Professional & scientific | 2013 |
| Povey Little Technology Limited | Information & communication | 2013 |
| Povey Little Trustees Limited | Professional & scientific | 2016 |
| Powell Performance Limited | Wholesale & retail | 2017 |
| Powell System Engineering Limited | Construction | 1993 |
| Powell Systems Limited | Construction | 2005 |
| Powerprep Nutrition Limited | Manufacturing | 2025 |
| Poymill Limited | Construction | 2017 |
| Pp&P Limited | Professional & scientific | 2018 |
| Ppcelectrical Ltd | Construction | 2025 |
| PPE Products and Services Ltd | Professional & scientific | 2020 |
| PPL Offshore Services Limited | Administrative & support | 2018 |
| PQ Engineering Ltd | Construction | 2023 |
| PR City Limited | Hospitality | 2025 |
| PR Contracting Limited | Professional & scientific | 2021 |
| Practically Perfect LX Limited | Manufacturing | 2019 |
| Practitioners Rooms Limited | Administrative & support | 2025 |
| Praxis (London) Limited | Professional & scientific | 1995 |
| Precision Auto Mobile Mechanic Ltd | Wholesale & retail | 2025 |
| Precision Carpentry and Building (UK) Limited | Other services | 2016 |
| Precision Manufactured Living Limited | Construction | 2018 |
| Precomm Consultants Limited | Professional & scientific | 1992 |
| Prelude Property Services Limited | Construction | 1997 |
| Premier Plumbing (South East) Limited | Professional & scientific | 2020 |
| Premiya Limited | Real estate | 2020 |
| Premiya Properties LLP | | 2025 |
| Premiya Property Ltd | Real estate | 2025 |
| Prepen (Kent) Limited | Construction | 2024 |
| Prepen Technical Services Ltd Limited | Construction | 2018 |