| Parkers Private Hire Limited | Transport & logistics | 2016 |
| Parkside Music Limited | Information & communication | 2016 |
| Parry Prestige Limited | Other services | 2014 |
| Particle Law Ltd | Professional & scientific | 2026 |
| Pasha Medical Group Ltd | Health & social care | 2017 |
| Past Impressions Limited | Other services | 2007 |
| Pavani Property Management Ltd | Real estate | 2022 |
| PAVILIONFISHBAR24 Ltd | Hospitality | 2024 |
| Pavlova Consultancy Limited | Information & communication | 2023 |
| Pavlova.London Ltd | Manufacturing | 2026 |
| Pawfection Groom Studio Ltd | Other services | 2026 |
| Pbaassx Ltd | Professional & scientific | 2023 |
| Pcentric Properties Limited | Real estate | 2021 |
| Pearing Close Management Company Limited | Households | 2008 |
| Peci Electrical Ltd | Construction | 2015 |
| Peeps KT4 Ltd | Hospitality | 2026 |
| Peeps Pizza KT4 Ltd | Hospitality | 2026 |
| Peeps Pizza Limited | Hospitality | 2022 |
| Performance Property Management Ltd | Households | 2018 |
| Perry Plumbing Ltd | Construction | 2025 |
| Peryton Limited | Wholesale & retail | 2023 |
| Philip Antoniou Consultancy Limited | Information & communication | 2017 |
| Phoenix Management Consulting Limited | Administrative & support | 2019 |
| Phoenix Vsrk Limited | Information & communication | 2019 |
| Pihu NON Food Limited | Wholesale & retail | 2025 |
| Pileku Ltd | Construction | 2024 |
| Pine Cone Consulting Limited | Other services | 2009 |
| Ping Pong Express Ltd | Transport & logistics | 2022 |
| Pink Blossom Bakery London Ltd | Hospitality | 2025 |
| Pintanoe Solutions Ltd | Professional & scientific | 2026 |
| Pipoca Events Ltd | Other services | 2013 |
| Plato Limited | Wholesale & retail | 2024 |
| Play Dead London Limited | Arts & recreation | 2018 |
| Plumbmonkey Limited | Construction | 2018 |
| PLUTO9 Ltd | Information & communication | 2024 |
| Poems for Children | Education | 2014 |
| POG Logistics (UK) Limited | Transport & logistics | 2018 |
| Potatodeals Limited | Information & communication | 2020 |
| Pound Plus Shop Ltd | Wholesale & retail | 2025 |
| Prakal Estates Ltd | Real estate | 2025 |
| Praniv Limited | Professional & scientific | 2024 |
| Pranova Limited | Information & communication | 2026 |
| PRD Construction Ltd | Construction | 2017 |
| Precise Care Home Ltd | Health & social care | 2025 |
| Premier Homecare Limited | Health & social care | 2003 |
| Present IT Limited | Information & communication | 2024 |
| Prime Concept Limited | Construction | 2024 |
| Prime Plaza Ltd | Wholesale & retail | 2023 |
| Prime Property Limited | Construction | 1986 |
| Prime Retail Stores Ltd | Wholesale & retail | 2023 |
| Primepath Estates Ltd | Real estate | 2021 |
| Pro Hire Driving School Ltd | Education | 2025 |
| Prodrive Training Centre Ltd | Education | 2025 |
| Professoft Limited | Information & communication | 2011 |
| Profound Electrical Service Limited | Construction | 2022 |
| Projectcode Ltd | Professional & scientific | 2012 |
| Projekted Ltd | Wholesale & retail | 2021 |
| Projex Custom Ltd | Manufacturing | 2025 |
| Prolec Electrical Services Ltd | Construction | 2016 |
| Property HUT London Ltd | Real estate | 2023 |
| Property Investment Keys Ltd | Real estate | 2021 |
| Property Point (UK) Ltd | Real estate | 2014 |
| Proplex Services Limited | Other services | 2018 |
| Prospect Directive Ltd | Professional & scientific | 2024 |
| Protech Trading Europe Limited | Information & communication | 2011 |
| Prxb Medical Ltd | Health & social care | 2024 |
| PS Construction (UK) Ltd | Construction | 2014 |
| PSA Associates Limited | Professional & scientific | 2016 |
| PT Beauty Ltd | Other services | 2021 |
| PT Nexus Ltd | Transport & logistics | 2026 |
| PTM Signs&Graphics Ltd | Professional & scientific | 2024 |
| PTU Trans Limited | Transport & logistics | 2025 |
| Pureearth Developments Limited | Construction | 2024 |
| Purelayer Design Ltd | Professional & scientific | 2026 |
| Purton Waste Management Ltd | Water & waste | 2025 |
| PY Estates Limited | Real estate | 2022 |
| QA Consult Ltd | Professional & scientific | 2024 |
| QA Consulting and Technology Services Limited | Information & communication | 2025 |
| QA INFINI8 Ltd | Information & communication | 2022 |
| Qinetica Limited | Real estate | 2011 |
| QOG Ltd | Professional & scientific | 2010 |
| Qualityize Limited | Information & communication | 2021 |
| Quantum Applied Intelligence Ltd | Information & communication | 2025 |
| Quaymile Limited | Information & communication | 2016 |
| Quick Fixtech & Vape Limited | Wholesale & retail | 2024 |
| Quick Service Maintenance Limited | Other services | 2022 |
| R & I Carpentry Contractors Ltd | Construction | 2023 |
| R N Education Limited | Education | 2021 |
| R R Roofing Ltd | Construction | 2017 |
| R Wellness Ltd | Health & social care | 2025 |
| Rackpoint Ltd | Information & communication | 2009 |
| Radhe Radhe Ltd | Real estate | 2022 |
| Raenova Limited | Health & social care | 2025 |
| Rains Plastering Ltd | Construction | 2017 |
| Rajwani Services Ltd | Education | 2024 |
| Rana Metals Trading Ltd | Construction | 2012 |
| Ransom Property Services Ltd | Administrative & support | 2021 |
| Ravayaa Ltd | Real estate | 2025 |
| Rawlings Residential Surveying Ltd | Professional & scientific | 2026 |
| RAY Audio Ltd | Administrative & support | 2024 |