| Penn Croft Farms Limited | Agriculture & fishing | 1986 |
| Pennant Flat Management Limited | Extraterritorial | 2000 |
| Pentland Training & Consultancy Limited | Professional & scientific | 2001 |
| Pepper Lulu and Garlic Ltd | Real estate | 2023 |
| Pepperpot Ventures Ltd | Administrative & support | 2014 |
| Percypea Ltd | Information & communication | 2006 |
| Perdita Limited | Professional & scientific | 2021 |
| Perdix Ltd | Information & communication | 2017 |
| Perennial Garden Services Ltd | Administrative & support | 2019 |
| Perfect Fit Technologies Limited | Information & communication | 2009 |
| Perfect Pitch Marquees Limited | Administrative & support | 2008 |
| Performance Mouthwear Ltd | Health & social care | 2009 |
| Perigon UK Limited | Manufacturing | 2010 |
| Perry Scott Creative Ltd | Wholesale & retail | 2020 |
| Perry Way Food & Wine Limited | Wholesale & retail | 2023 |
| Personal Pharma Resourcing Ltd | Administrative & support | 2013 |
| Perwone Street (Aldershot) Management Company Limited | Real estate | 2015 |
| Pest Control Pros Ltd | Administrative & support | 2026 |
| Pest Guru Ltd | Administrative & support | 2014 |
| Pet-Alpha Ltd | Manufacturing | 2026 |
| Peta Homes Limited | Construction | 2013 |
| Peter Minett & Partners Limited | Professional & scientific | 1995 |
| Peter Norris (Haulage) Limited | Water & waste | 1972 |
| Peter Wildash (Holdings) Ltd | Financial services | 2025 |
| Petpawsparadise Limited | Wholesale & retail | 2023 |
| Petri Health Consulting Ltd | Information & communication | 2022 |
| Petrogas Services Limited | Administrative & support | 2000 |
| Petticoat Square Limited | Financial services | 2022 |
| Petzold.Oliver Limited | Other services | 2007 |
| PG Tessuti Limited | Professional & scientific | 2021 |
| PGO Ltd | Wholesale & retail | 2024 |
| PH Software UK Ltd | Information & communication | 2017 |
| Phantom Motor Cars Limited | Wholesale & retail | 2005 |
| Pharcentrx Ltd | Professional & scientific | 2024 |
| Pharma Machinery Limited | Wholesale & retail | 2008 |
| Pharmeconomy Ltd | Administrative & support | 2020 |
| Phase 1 MCS Limited | Wholesale & retail | 2010 |
| PHB Networking Ltd | Information & communication | 2010 |
| PHB Smart Homes Limited | Information & communication | 2022 |
| PHB Support Ltd | Information & communication | 2015 |
| Phil Flaxton Associates Limited | Administrative & support | 2010 |
| Phil Knowles Associates Limited | Professional & scientific | 2011 |
| Philip Potter Wealth Management Limited | Financial services | 2018 |
| Philip Sheen Associates Ltd | Professional & scientific | 2016 |
| Philip Viveash-Brainch Ltd | Professional & scientific | 2019 |
| Phiness PR Ltd | Professional & scientific | 2009 |
| PHM Advisers Limited | Professional & scientific | 2018 |
| Phoenix Bridge Limited | Professional & scientific | 2026 |
| Phoenix Geoscience Limited | Professional & scientific | 2003 |
| Phoenix Green Garage Sales Limited | Wholesale & retail | 2023 |
| Phoenix Integrated Security Limited | Other services | 2002 |
| Phoenix Timber Buildings Ltd | Construction | 2002 |
| Phoenix Youth Productions Ltd | Arts & recreation | 2019 |
| Photospeak Ltd | Professional & scientific | 2025 |
| PI Developments Ltd | Construction | 2017 |
| Pierson Business Services Limited | Professional & scientific | 2005 |
| PIG OUT Pizza Limited | Hospitality | 2021 |
| Pimms Hair & Beauty Limited | Other services | 2006 |
| Pine Brow Consulting Limited | Professional & scientific | 2025 |
| Pinfold Workshop Limited | Manufacturing | 2024 |
| Pink Griffin Ltd | Health & social care | 2025 |
| Pinnacle Coaching and Development Limited | Administrative & support | 2019 |
| Pinpoint Fusion Ltd | Other services | 2022 |
| PIP Collier Gardens Ltd | Administrative & support | 2014 |
| Pippin (Great Kimble) Management Company Limited | Households | 2023 |
| Pitcrew Partners Ltd | Wholesale & retail | 2024 |
| Pivot Limited | Professional & scientific | 2007 |
| Pivot MSL Limited | Professional & scientific | 2015 |
| Pivot Resourcing Limited | Professional & scientific | 2007 |
| Pixel IS Limited | Information & communication | 2007 |
| Pixie Green Ltd | Other services | 2017 |
| Pizza House Express Ltd | Hospitality | 2023 |
| PJS CAR2COMMERCIAL Ltd | Wholesale & retail | 2024 |
| Place Settings (London) Limited | Hospitality | 1996 |
| Plaice 11 Limited | Hospitality | 2017 |
| Plan a Property Ltd | Real estate | 2018 |
| Plan B Consulting (R&D) Limited | Professional & scientific | 2016 |
| PLANNINGAGENT360 Ltd | Information & communication | 2025 |
| Plantage Fiduciary Services Limited | Extraterritorial | 2018 |
| Planval Limited | Professional & scientific | 2013 |
| Platinum Nutrition Ltd | Wholesale & retail | 2023 |
| Platinum Roses Limited | Professional & scientific | 1997 |
| Playpip Limited | Information & communication | 2014 |
| Plbrands Limited | Wholesale & retail | 2018 |
| Plinth Fit Ltd | Information & communication | 2026 |
| Plum-Mex Limited | Construction | 2019 |
| Plumbing and Construction Ltd | Construction | 2025 |
| Plumbplan (Domestic) Ltd | Construction | 2020 |
| PNR Capital Limited | Real estate | 2024 |
| Podlogix Limited | Wholesale & retail | 2020 |
| Poesy Ltd | Manufacturing | 2019 |
| Point East Research and Analysis Ltd | Professional & scientific | 2019 |
| Point Resourcing Limited | Administrative & support | 2008 |
| Polarseal Holdings Limited | Manufacturing | 2022 |
| Polarseal Tapes and Conversions Limited | Manufacturing | 2016 |
| Poldaw Designs Ltd | Professional & scientific | 1975 |
| Polymath Venture Holdings Limited | Professional & scientific | 2014 |
| PON Investments Limited | Real estate | 2016 |
| POP Products Ltd | Information & communication | 2015 |
| Porta Romana Trust Company Limited | Financial services | 2021 |