| People Matter(S) HRS Limited | Administrative & support | 2012 |
| People Progression Limited | Professional & scientific | 2018 |
| People Strategy Ltd | Administrative & support | 2021 |
| Perceptrix Limited | Information & communication | 2013 |
| Peregrine Traders Ltd | Wholesale & retail | 2024 |
| Perennial Management Services Ltd | Information & communication | 2018 |
| Perfect People Recruitment Solutions Limited | Administrative & support | 2003 |
| Perla Property Developments Ltd | Construction | 2024 |
| Permanent Cosmetics Billericay Ltd | Other services | 2026 |
| Perpetual Holidays Limited | Hospitality | 2020 |
| Perpetuare Ltd | Administrative & support | 2025 |
| Personal Training UK Limited | Arts & recreation | 2004 |
| Pess Group Holdings Ltd | Administrative & support | 2025 |
| Pess Ltd | Construction | 2023 |
| Peter James Heating Limited | Administrative & support | 2017 |
| Peterhouse Farms Limited | Construction | 2017 |
| Petersham Advisors Limited | Extraterritorial | 2017 |
| Petranella Properties Limited | Real estate | 2026 |
| PFD Housing Limited | Real estate | 2021 |
| PG Wealth Ltd | Financial services | 2019 |
| PH Contracting Ltd | Construction | 2020 |
| Pharez Properties Limited | Real estate | 2024 |
| Pharmashelve Limited | Manufacturing | 2020 |
| PHB Auto Services Limited | Wholesale & retail | 2022 |
| PHB Commercials Limited | Extraterritorial | 2022 |
| PHB Motors Limited | Extraterritorial | 2022 |
| PHB Traders Limited | Wholesale & retail | 2013 |
| Phillips Asset Management Ltd | Real estate | 2023 |
| Philosophy Football Limited | Arts & recreation | 2001 |
| Phoenix Horse Boxes Limited | Manufacturing | 2018 |
| Phoenix Programme Management and Consultancy Limited | Professional & scientific | 2020 |
| Phoenix PUB Rainham Limited | Hospitality | 2023 |
| Phonesis UK Ltd | Information & communication | 2010 |
| PHP Contractors Limited | Construction | 2004 |
| Phrs Consultancy Services Limited | Construction | 2013 |
| Physio for Better Limited | Health & social care | 2021 |
| Pickstrings Limited | Wholesale & retail | 2018 |
| Piggy Went to Market Limited | Hospitality | 2016 |
| Pikclub Limited | Information & communication | 2026 |
| Pinconnect Ltd | Information & communication | 2025 |
| Pinehill Golf Club Ltd | Administrative & support | 2006 |
| Pink Ladies Services Limited | Other services | 2025 |
| Pinpoint Worldwide Ltd | Extraterritorial | 2008 |
| Pitchd Ltd | Professional & scientific | 2024 |
| Pitchpan Ltd | Education | 2025 |
| PIX Events Ltd | Arts & recreation | 2022 |
| PJ Fire & Security Group Limited | Professional & scientific | 2010 |
| PJH Farming Limited | Agriculture & fishing | 2006 |
| Pjhp Limited | Agriculture & fishing | 2011 |
| PJW Homes Limited | Real estate | 2019 |
| PL & Plus Studio Ltd | Manufacturing | 2024 |
| PLA Consulting Limited | Financial services | 2025 |
| Plaistow Broadway Filling Stations Limited | Wholesale & retail | 1955 |
| Plan 64 Limited | Arts & recreation | 2010 |
| Planning Ahead Limited | Other services | 2024 |
| Planning Ahead Professionals Ltd | Education | 2007 |
| Planwise Studio Ltd | Information & communication | 2026 |
| Plasmerton Limited | Hospitality | 1992 |
| Plaster Mouldings Studio Limited | Construction | 2018 |
| Platinum UK Electrical Ltd | Construction | 2019 |
| Platts Platters Billericay Ltd | Wholesale & retail | 2023 |
| Playways Preschool Limited | Health & social care | 2020 |
| Pleshey Business Solutions Ltd | Professional & scientific | 2021 |
| Plot 1 Homes Ltd | Real estate | 2019 |
| Plump Productions Limited | Information & communication | 2011 |
| PLW Payroll Limited | Professional & scientific | 2016 |
| PM Ferry Ltd | Construction | 2011 |
| Pmferry (Services) Ltd | Construction | 2011 |
| Pocket PMO Ltd | Information & communication | 2026 |
| Podium Merch Limited | Wholesale & retail | 2022 |
| Point of Origin Ltd | Professional & scientific | 2015 |
| Point Zero Solutions Limited | Information & communication | 2015 |
| Pointque Ltd | Professional & scientific | 2023 |
| Polished Shoes Ltd | Wholesale & retail | 2023 |
| Pollen Landscapes Ltd | Administrative & support | 2015 |
| Polly Wreford Limited | Professional & scientific | 2004 |
| Pool & Valentino Ltd | Agriculture & fishing | 2014 |
| Popcorn Design Ltd | Professional & scientific | 2026 |
| Port Properties Corporation Limited | Extraterritorial | 2005 |
| Porter Electrics Ltd | Construction | 2026 |
| Porth Developments Ltd | Real estate | 2025 |
| Porth Holdings Ltd | Financial services | 2025 |
| Pots and Posy Limited | Wholesale & retail | 2021 |
| POW 2 Limited | Administrative & support | 2024 |
| Power Correction Services Limited | Wholesale & retail | 2011 |
| Power Property Maintenance Ltd | Real estate | 2021 |
| Pozitively SET Limited | Construction | 2022 |
| Ppsl Commercial Ltd | Construction | 2020 |
| Ppsl Ltd | Construction | 2016 |
| PR Training Services Ltd | Information & communication | 2005 |
| Practiconsult Ltd | Professional & scientific | 2023 |
| Praelatus Management & Services Ltd | Professional & scientific | 2020 |
| Pratley & Partners Ltd | Construction | 2026 |
| PRC Airport Transfers and Executive Car Services Limited | Transport & logistics | 2025 |
| PRC Luxury Travel Ltd | Transport & logistics | 2022 |
| Precious Metal Transport Limited | Transport & logistics | 2008 |
| Premier Flight Services Limited | Extraterritorial | 1975 |
| Premier Freight Services Limited | Transport & logistics | 1980 |
| Premier Taxis of Wickford Limited | Transport & logistics | 2002 |
| Preou Heating Ventilation & Air Conditioning Ltd | Construction | 2018 |