| Pethel Marali Limited | Professional & scientific | 2015 |
| Petmag Care Services Limited | Administrative & support | 2023 |
| Petrus Cargo Assurance Services Limited | Professional & scientific | 2010 |
| PG Export Import Ltd | Other services | 2019 |
| PGN Plumbing & Heating Ltd | Construction | 2020 |
| PGR Management Consultancy Limited | Professional & scientific | 2012 |
| Pgtutoring Ltd | Education | 2023 |
| PH Auto Mobile Service Ltd | Wholesale & retail | 2026 |
| Phab Limited | Health & social care | 1981 |
| Phab UK Enterprises Limited | Extraterritorial | 1990 |
| Pham Capital Holdings Ltd | Real estate | 2026 |
| Pharmaflex Services Ltd | Administrative & support | 2025 |
| Pharmalink (London) Ltd | Health & social care | 2011 |
| Pharmelite Limited | Health & social care | 2024 |
| Pharmiverse Solutions Ltd | Wholesale & retail | 2025 |
| Phat Cookie Ltd | Wholesale & retail | 2025 |
| Phaze 1 - Plumbing and Heating Limited | Construction | 2026 |
| Phaze 1 Properties Limited | Real estate | 2025 |
| Pheonix 1 Design & Construction Ltd | Construction | 2019 |
| Phil Roulston Plumbing and Heating Ltd | Construction | 2011 |
| Philipose Limited | Health & social care | 2011 |
| Phillips Gardening Services Ltd | Administrative & support | 2025 |
| Phipps Electrical Solutions Ltd | Construction | 2007 |
| Phoenix 30 Limited | Hospitality | 2020 |
| Phoenix Event Structures Ltd | Administrative & support | 2023 |
| Phoenix Finance Ltd | Professional & scientific | 2016 |
| Phoenix High Academy Ltd | Education | 2025 |
| Phoenix Roofing Ltd | Construction | 2022 |
| Phoenix Trinity Limited | Hospitality | 2006 |
| Phoneandvapedoctor Limited | Wholesale & retail | 2024 |
| Physiical Ltd | Administrative & support | 2026 |
| Physiosplus Limited | Health & social care | 2014 |
| Physiowealth Limited | Health & social care | 2020 |
| Piccadilly Ticket Hub Ltd | Wholesale & retail | 2023 |
| Pickupnshoot Ltd | Professional & scientific | 2025 |
| Picto Investments Ltd | Real estate | 2022 |
| Picturama Ltd | Wholesale & retail | 1997 |
| Piece of Vitali Ltd | Information & communication | 2021 |
| Pierre Venter - BIM Limited | Professional & scientific | 2017 |
| Pilgrim House and Garden Ltd | Wholesale & retail | 2021 |
| Pillinger Service and Maintenance Limited | Manufacturing | 2003 |
| Pillory Down Skips Limited | Water & waste | 2016 |
| Pima Construction Ltd | Construction | 2016 |
| Pinnacle Service Ltd | Construction | 2013 |
| Pinplot Consulting Ltd | Information & communication | 2026 |
| Pioneer Business Technology Solutions Ltd | Information & communication | 2011 |
| Pioneer CRM Consultancy Limited | Professional & scientific | 2022 |
| Pioneer Removals Ltd | Transport & logistics | 2010 |
| Pious Properties Limited | Real estate | 2019 |
| Pipe Force Ltd | Construction | 2025 |
| Pipeworkz Limited | Construction | 2016 |
| Pipperade Limited | Hospitality | 2017 |
| PIR Squares Ltd | Wholesale & retail | 2020 |
| Piriware Ltd | Information & communication | 2022 |
| Pittman (Holdings) Ltd | Financial services | 2011 |
| Pivot International (UK) Limited | Manufacturing | 2015 |
| Pivotsimplygroup Limited | Information & communication | 2026 |
| Pixon Chemie Group Limited | Financial services | 2021 |
| Pixon Chemie UK Ltd | Manufacturing | 2014 |
| PIY Ltd | Information & communication | 2026 |
| Pizza Project W6 Limited | Hospitality | 2018 |
| PIZZA386SUTTON Limited | Hospitality | 2025 |
| Pizzas & Mughal Caterers Limited | Hospitality | 2025 |
| PJ Clothing Limited | Wholesale & retail | 2007 |
| PJ Medical Limited | Construction | 2009 |
| Pjets Limited | Administrative & support | 2006 |
| PJP Delivery Services Limited | Transport & logistics | 2015 |
| PJS Cleaners Limited | Administrative & support | 2019 |
| PK Property Rental Ltd | Real estate | 2020 |
| Plaanetgadget Limited | Wholesale & retail | 2016 |
| Plamen Petkov Ltd | Construction | 2015 |
| Planet Kitchens Limited | Construction | 2013 |
| Planful UK Limited | Wholesale & retail | 2021 |
| Planily Ltd | Information & communication | 2026 |
| Planning Permission Agent Limited | Professional & scientific | 2025 |
| Plasticfascias.Shop Limited | Wholesale & retail | 2020 |
| Plastictox UK Ltd | Health & social care | 2025 |
| Platinum Equity Management Ltd | Real estate | 2011 |
| Platinum Haulage Limited | Transport & logistics | 2011 |
| Plato's House Ltd | Wholesale & retail | 2023 |
| Platoform Limited | Information & communication | 2017 |
| Play Dough Music Recordings Limited | Information & communication | 2015 |
| Playgolf LM Limited | Professional & scientific | 1950 |
| Plethora Designs Ltd | Real estate | 2015 |
| Plexjet Limited | Information & communication | 2016 |
| PLF Healthcare Limited | Professional & scientific | 2022 |
| PLH Building Services Ltd | Construction | 2011 |
| Plot 10 Limited | Construction | 2018 |
| Plot Planning & Development Ltd | Construction | 2025 |
| Plovburg Ltd | Construction | 2022 |
| Ploythai Limited | Hospitality | 2023 |
| PLP GAS & Heating Ltd. | Construction | 2016 |
| PLP Property Investments Ltd | Real estate | 2015 |
| Plugbikes.Com Ltd | Wholesale & retail | 2024 |
| Plugged-In Ventures Ltd | Wholesale & retail | 2025 |
| Plumb-Aid Ltd | Construction | 2022 |
| Plumbcomfort Ltd | Construction | 2026 |
| Plumberry Limited | Manufacturing | 2016 |
| Plumbminto's Limited | Construction | 2014 |
| Plumbtech Plumbing & Heating Ltd | Construction | 2018 |