| P2PFINANCE Limited | Professional & scientific | 2013 |
| Pacadvertising Ltd | Professional & scientific | 2018 |
| Paceover Limited | Construction | 2009 |
| Pacific Pegasus Ltd | Professional & scientific | 2018 |
| PAI Clinic Ltd | Health & social care | 2016 |
| Paik Ltd | Wholesale & retail | 2022 |
| Paint Shed (London) Limited | Other services | 2022 |
| Palm Lodge Limited | Health & social care | 2017 |
| Palmer Interiors Ltd | Construction | 1998 |
| Panama Developments Limited | Real estate | 2025 |
| Panorama International Trade Ltd | Wholesale & retail | 2013 |
| Panova Ltd. | Wholesale & retail | 2012 |
| Panthera Pictures Ltd. | Information & communication | 2024 |
| Pantry NO. 7 Ltd | Wholesale & retail | 2025 |
| Paper Lion Limited | Professional & scientific | 2017 |
| Papermed Limited | Information & communication | 2019 |
| Para Food & Wine Ltd | Wholesale & retail | 2014 |
| Paradise Financial Limited | Financial services | 1993 |
| Parallax Creative UK Limited | Professional & scientific | 2024 |
| Paramount Precision Engineering Limited | Manufacturing | 1991 |
| Paranetwork Limited | Information & communication | 2012 |
| Park Lane Chauffeurs Ltd | Transport & logistics | 2018 |
| Parrot Street Ltd | Wholesale & retail | 2017 |
| Parshiv Consulting Limited | Professional & scientific | 2022 |
| Parsin Viands Ltd | Hospitality | 2019 |
| Pathway Caribbean Limited | Professional & scientific | 1996 |
| Paton Heating Ltd | Construction | 2000 |
| Paul E.M. Bailey Limited | Health & social care | 2008 |
| Paul Saunderson Music Ltd | Arts & recreation | 2019 |
| Pawpawclean Ltd | Other services | 2024 |
| Paxl Ltd | Financial services | 2025 |
| PC Roofing Solutions Ltd | Construction | 2025 |
| Pdgn Limited | Other services | 2016 |
| Pdnm Operations Limited | Real estate | 2022 |
| Peacenest Concierge Ltd | Administrative & support | 2026 |
| Peak Partners Ltd | Information & communication | 2014 |
| Pearson Hards LLP | | 2012 |
| Peck Carpentry & Maintenance Ltd | Construction | 2024 |
| Pedhead Ltd | Information & communication | 2012 |
| Pelikan Facade Ltd | Construction | 2026 |
| Penny's Boat Limited | Professional & scientific | 2019 |
| Peptide Solutions Ltd | Wholesale & retail | 2025 |
| PER Ardua AD Astra Ltd | Professional & scientific | 2026 |
| Perch Rock Ltd | Professional & scientific | 2015 |
| Period Property Painting Ltd | Construction | 2022 |
| Perpetual Succor Ltd | Information & communication | 2023 |
| Persian Food Catering Ltd | Hospitality | 2020 |
| Personal Hydroponics Ltd | Professional & scientific | 2023 |
| Peter Barney Properties Limited | Real estate | 2004 |
| Peter Millett Consultancy Ltd | Public administration | 2017 |
| Pettiferroofing Ltd | Construction | 2024 |
| Pharmina Ltd | Health & social care | 2017 |
| Phil Goodall Coaching & Consultancy Ltd | Professional & scientific | 2024 |
| Phillip & Eugenia Ltd | Other services | 2004 |
| Philly Wilson Design Limited | Other services | 2005 |
| Phoenix Notary Ltd | Professional & scientific | 2025 |
| Photographic Techniques Limited | Professional & scientific | 1966 |
| Photography by ASH Limited | Professional & scientific | 2011 |
| Physiowellness Ltd | Health & social care | 2025 |
| Pilotcrown Limited | Real estate | 1982 |
| PIN TUO TUO Express Ltd | Transport & logistics | 2023 |
| Pine Tree Lake Ltd | Professional & scientific | 2011 |
| Ping Construction Limited | Construction | 2006 |
| Pink Pigeon Consultancy Limited | Professional & scientific | 2018 |
| PINK1 Limited | Other services | 2025 |
| Pinks Germany Limited | Manufacturing | 2015 |
| Pinnacle Consultants Advance Ltd | Other services | 2017 |
| Pinnacle Trading Services Limited | Manufacturing | 2005 |
| Pinpoint FX Ltd | Arts & recreation | 2025 |
| Piosign Ltd | Information & communication | 2021 |
| Pipeline Engineering Design Limited | Professional & scientific | 2011 |
| Piper Media Limited | Professional & scientific | 2015 |
| Pippy Business Limited | Professional & scientific | 2019 |
| Pitt Consulting Ltd | Professional & scientific | 2019 |
| Pivot Energy Consultancy Limited | Professional & scientific | 2025 |
| Pixel Gateway Limited | Information & communication | 2021 |
| PJ Elite Properties Ltd | Real estate | 2024 |
| PK Electrical & Building Services Ltd | Construction | 2022 |
| PK London Limited | Administrative & support | 2019 |
| Plancraft Consultants Ltd | Professional & scientific | 2025 |
| Planning Additions Limited | Professional & scientific | 2004 |
| Plasm Productions Limited | Professional & scientific | 2024 |
| Playford Haven Limited | Real estate | 2026 |
| Plush Glow Ltd | Wholesale & retail | 2022 |
| Plutos Solution Ltd | Construction | 2011 |
| Polaris Law London Limited | Professional & scientific | 2021 |
| Polepole Limited | Professional & scientific | 2012 |
| Pollen Props Ltd | Administrative & support | 2021 |
| Polydentic Ltd | Wholesale & retail | 2018 |
| Poncho Playa. Ltd | Wholesale & retail | 2025 |
| Ponsuke Co Ltd | Wholesale & retail | 2025 |
| Poorvi Software Services Ltd | Information & communication | 2024 |
| Porja Construction Limited | Construction | 2024 |
| Portavi Limited | Administrative & support | 2025 |
| Portfolio Software Limited | Information & communication | 2002 |
| Portillion Care Ltd | Health & social care | 2025 |
| Portillion Specialist Solutions Ltd | Financial services | 2025 |
| Portillion SPV OIL & GAS Ltd | Financial services | 2023 |
| Portsmouth Hoteliere Limited | Real estate | 2026 |
| Porziuncola Ltd | Households | 2018 |