| Pcegc Ltd | Real estate | 2025 |
| Pchr Consulting Ltd | Extraterritorial | 2017 |
| Pcmacdoctors Limited | Wholesale & retail | 2005 |
| PDR Projects Limited | Information & communication | 2010 |
| Peacock Clothing London Limited | Wholesale & retail | 2018 |
| Pear Tree Fulham (Catering) Limited | Hospitality | 2024 |
| Pearson Advisors Limited | Financial services | 2024 |
| Peasy Baby Ltd | Hospitality | 2025 |
| Pebworth Gardens Ltd | Health & social care | 2026 |
| Peca Group Ltd | Wholesale & retail | 2025 |
| Peck Performance Limited | Professional & scientific | 2015 |
| Pedicuremasters Ltd | Other services | 2022 |
| Pegrid Limited | Real estate | 2014 |
| Pelican Architecture and Design Ltd | Professional & scientific | 2014 |
| Pelister Marine Limited | Extraterritorial | 2021 |
| Pelltero Limited | Manufacturing | 2025 |
| Penbrook Ltd | Administrative & support | 2018 |
| Pentadec Partners Ltd | Professional & scientific | 2024 |
| Pentair International (UK) Ltd | Professional & scientific | 2018 |
| Pentair UK Holdings Limited | Professional & scientific | 2014 |
| People and Practice Ltd | Professional & scientific | 2016 |
| Pepe Neuroscience Ltd | Education | 2025 |
| PER4M Audit Ltd | Professional & scientific | 2016 |
| Pera Consultancy Ltd | Professional & scientific | 2026 |
| Perception Sport Limited | Information & communication | 2023 |
| Perfectly Applied Ltd | Other services | 2022 |
| Perform Pilates Limited | Health & social care | 2013 |
| Performance Products London Limited | Wholesale & retail | 2024 |
| Peridot Finance Ltd | Financial services | 2023 |
| Peridot Vehicles Ltd | Wholesale & retail | 2023 |
| Peril Repairs Ltd | Construction | 2023 |
| Perpendia Ltd | Extraterritorial | 2007 |
| Perpetual Value Partners Limited | Professional & scientific | 2011 |
| Perrine Ltd | Professional & scientific | 2018 |
| Perseverance Hope Ltd | Wholesale & retail | 2022 |
| Persia Rose Ltd | Other services | 2018 |
| Persianpan Ltd | Hospitality | 2023 |
| Personal Focus Ltd | Professional & scientific | 2017 |
| Pesca Rich Europe Limited | Wholesale & retail | 2001 |
| Peteq Ltd | Mining & quarrying | 2015 |
| Peter Graves Growth and Investment Limited | Professional & scientific | 2024 |
| Peter Whiting Consulting Limited | Professional & scientific | 2025 |
| PGW Capital Ltd | Financial services | 2015 |
| PH Brickwork and Paving Limited | Construction | 2019 |
| Phase Group Holdings Limited | Administrative & support | 2025 |
| Phillips Housing Consultancy Ltd | Professional & scientific | 2023 |
| Phipps Finance Limited | Professional & scientific | 2018 |
| Phitech Solutions Ltd | Professional & scientific | 2022 |
| Phoenix Field Ltd | Wholesale & retail | 2023 |
| Phoenix Property Maintenance & Development Ltd | Construction | 2019 |
| Phoenix Wharf Holdings Limited | Professional & scientific | 2018 |
| Phone 4 ALL Ltd | Other services | 2015 |
| PHONE2FIX Ltd | Administrative & support | 2017 |
| Phytomedix Ltd | Wholesale & retail | 2023 |
| Pianoforte Academy Ltd | Information & communication | 2026 |
| Piece by Piece Productions Limited | Information & communication | 2015 |
| Pieces of Eight Records Limited | Information & communication | 2006 |
| Pierre Pouplin Company Ltd | Other services | 2013 |
| PIF Group Ltd | Real estate | 2024 |
| Pifr Consulting Limited | Professional & scientific | 2012 |
| Pine Horizon Limited | Wholesale & retail | 2015 |
| Pink Connect (Twickenham) Ltd | Information & communication | 2008 |
| Pinnacle Residential Limited | Real estate | 2023 |
| Pintail Media Limited | Administrative & support | 2021 |
| Pioneerpartners LLP | | 2023 |
| Piper Violet Ltd | Other services | 2020 |
| PIR Consultants Ltd | Public administration | 2021 |
| PIS 01 Limited | Real estate | 2006 |
| Pita Construction Consultants Limited | Real estate | 1998 |
| Pitchcott Hill Farms Limited | Agriculture & fishing | 1962 |
| Pivt Media Limited | Information & communication | 2023 |
| Pivyt Ltd | Professional & scientific | 2024 |
| Pixel Panda Ltd | Information & communication | 2017 |
| Pizza Pizza Limited | Hospitality | 2019 |
| PIZZA2NIGHT (WL) Ltd | Hospitality | 2025 |
| PIZZA2NIGHT TW1 Limited | Hospitality | 2024 |
| PJC Digital Ltd | Wholesale & retail | 2026 |
| PK Consultancy Services Ltd | Professional & scientific | 2018 |
| PK Retails Tech Gadget Ltd | Wholesale & retail | 2020 |
| PKF Limited | Information & communication | 2015 |
| Placd Recruitment Ltd | Administrative & support | 2025 |
| Plan B Consulting Limited | Professional & scientific | 2013 |
| Planetary X Limited | Information & communication | 2024 |
| Plantium Investments Ltd | Real estate | 2025 |
| Plantium THREE70 Ltd | Hospitality | 2022 |
| Plantsplants Limited | Wholesale & retail | 2014 |
| Platinum Land & Property Ltd | Real estate | 2021 |
| Platinum Panther Consultancy Ltd | Professional & scientific | 2023 |
| Plato Scaffolding Ltd | Construction | 2015 |
| Platonic Productions Limited | Arts & recreation | 2010 |
| Platonic Publishing Limited | Professional & scientific | 2019 |
| Playful Pips Limited | Education | 2014 |
| Playing on the Edge Ltd | Professional & scientific | 2017 |
| Plazo Limited | Information & communication | 2010 |
| Plena Terra Ltd | Agriculture & fishing | 2023 |
| PLH Business Services Ltd | Professional & scientific | 2007 |
| Plpd Invest Ltd | Real estate | 2023 |
| Plumbing IT Right Ltd | Construction | 2021 |
| PMF Engineering Services Ltd | Construction | 2019 |
| PMK Property Limited | Real estate | 2017 |