| Picasso Ltd | Real estate | 2022 |
| Pickwell Park Developments Limited | Construction | 1997 |
| PIJ Food Group Ltd | Wholesale & retail | 2014 |
| PILATES@NO.3 Ltd | Extraterritorial | 2022 |
| Pinak Properties Ltd | Hospitality | 2017 |
| Pinello Ltd | Wholesale & retail | 2018 |
| Pinewood ROW Limited | Construction | 2024 |
| Pinnacle Forte Limited | Wholesale & retail | 2019 |
| Pinnacle Holdings Ltd | Real estate | 2026 |
| Pinnacle Polishing Limited | Construction | 2025 |
| Pinnaclemovex Ltd | Transport & logistics | 2026 |
| Pinner Building Services Limited | Construction | 2018 |
| Pinner Hill Estate Limited | Administrative & support | 1999 |
| Pinner Street Accountants Limited | Professional & scientific | 2024 |
| Pioneer Stationers (UK) Limited | Wholesale & retail | 2016 |
| Pipers Removals Ltd | Transport & logistics | 2021 |
| Pizza & Charcoal House Ltd | Hospitality | 2025 |
| Place Agents Limited | Real estate | 2009 |
| Planet Fresh Ltd | Wholesale & retail | 2020 |
| Platingnum Park Limited | Information & communication | 2004 |
| Platinum Enterprise (Europe) Ltd | Administrative & support | 2011 |
| Platow Associates Limited | Professional & scientific | 1997 |
| Play at Altitude Ltd | Information & communication | 2026 |
| Play on Football Limited | Administrative & support | 2015 |
| Plisi Limited | Hospitality | 2024 |
| Plouescat Investments Limited | Financial services | 2021 |
| Plumbing & Heating Solutions Limited | Construction | 2022 |
| PMI Commercial Property Limited | Real estate | 2013 |
| Pn&Mma Consulting Limited | Professional & scientific | 2024 |
| Pn&Mma Enterprise Limited | Information & communication | 2019 |
| PNA Properties Limited | Construction | 2004 |
| PND Ventures Ltd | Professional & scientific | 2019 |
| PND8 Ventures Ltd | Professional & scientific | 2025 |
| PNI Logistics (UK) Limited | Transport & logistics | 2012 |
| Pns-Greenways Limited | Real estate | 2024 |
| Pnsvenustwo Limited | Real estate | 2024 |
| PNZ Digital Ltd | Information & communication | 2024 |
| Podium Perfect Ltd | Professional & scientific | 2020 |
| Police Community Clubs Limited | Education | 2006 |
| Polperro Properties Limited | Hospitality | 2018 |
| Pomelo Wellbeing Ltd | Information & communication | 2014 |
| Pooja Sweets Northwood Ltd | Wholesale & retail | 2025 |
| Poonam's Piano Rhythms Ltd | Education | 2023 |
| Popplewell Consulting Ltd | Professional & scientific | 2020 |
| Porter Frith Limited | Information & communication | 1990 |
| Portfolio Publishing Limited | Information & communication | 2005 |
| Portland Heights Management Company Limited | Households | 1991 |
| Positive Academia CIC | Professional & scientific | 2024 |
| Positive Image Communications Limited | Professional & scientific | 1989 |
| Poststat Limited | Wholesale & retail | 2020 |
| Potter Street Limited | Financial services | 2024 |
| Pouchlink Ltd | Manufacturing | 2012 |
| Power Bespoke Building Limited | Construction | 2013 |
| Power of Success Limited | Professional & scientific | 2012 |
| Powmac (Holdings) Limited | Real estate | 1976 |
| Poyle Two Holdings Limited | Financial services | 2023 |
| Ppmg Investments Limited | Real estate | 2018 |
| Pradip Patel Limited | Wholesale & retail | 1974 |
| Pragati Consulting Ltd | Professional & scientific | 2013 |
| Pragati Ventures Ltd | Real estate | 2024 |
| Praktik Ltd | Water & waste | 2021 |
| Pravnav Ltd | Information & communication | 2011 |
| PRB Residential Ltd. | Real estate | 2015 |
| Precision 108 Limited | Health & social care | 2020 |
| Precision Interim Management Ltd | Professional & scientific | 2019 |
| Preeon Limited | Hospitality | 2024 |
| Premier Painting Limited | Construction | 2019 |
| Prenem Limited | Financial services | 2015 |
| Prestige ARC Limited | Wholesale & retail | 2018 |
| Prestige Pictures Limited | Professional & scientific | 1987 |
| Prestige Security Solutions Limited | Administrative & support | 2005 |
| Prian Enterprises Limited | Financial services | 2018 |
| Pride Quality Services Limited | Professional & scientific | 2016 |
| Prima Digital Ventures Ltd | Professional & scientific | 2020 |
| Primac Construction Ltd | Construction | 2019 |
| Prime IV and Aesthetics Limited | Health & social care | 2024 |
| Prime Masonry Ltd | Construction | 2026 |
| Prime Meridien Limited | Professional & scientific | 2022 |
| Pristinecleanandshine Ltd | Administrative & support | 2024 |
| Priyira Management Ltd | Administrative & support | 2016 |
| PRN Hygiene Services Limited | Administrative & support | 2009 |
| PRN Ltd | Real estate | 2018 |
| Pro Accounting Services Limited | Professional & scientific | 2015 |
| Pro-Ehs Limited | Professional & scientific | 2016 |
| Probate Property Purchasers Ltd | Real estate | 2022 |
| Processgym Limited | Information & communication | 2026 |
| Professionalasian Limited | Information & communication | 2017 |
| Progressive Farmers Limited | Agriculture & fishing | 1961 |
| Project 7 Limited | Administrative & support | 1996 |
| Project TDS Ltd | Information & communication | 2026 |
| Prologix Technologies Ltd | Professional & scientific | 2009 |
| Promata Consulting Limited | Information & communication | 2026 |
| Propcity Limited | Real estate | 2017 |
| Proserpine Limited | Real estate | 2004 |
| Proteus Maintenance Limited | Construction | 2018 |
| Protex Chemicals Limited | Wholesale & retail | 1972 |
| Protrade Dynamics Limited | Wholesale & retail | 2024 |
| Proven Group Limited | Professional & scientific | 2015 |
| Proventus Advisory Limited | Wholesale & retail | 2013 |
| Proventus Beta Limited | Wholesale & retail | 2020 |