| Peppercorn House Ltd | Real estate | 2025 |
| Perfect Motive Limited | Real estate | 2012 |
| Perfections Care Ltd | Health & social care | 2025 |
| Perfections Construction Limited | Agriculture & fishing | 2025 |
| Perfections Recruitment Agency Limited | Administrative & support | 2026 |
| Perfectwebmetrix Ltd | Information & communication | 2022 |
| Perficientcons Ltd | Construction | 2024 |
| Performance Panels Limited | Manufacturing | 1994 |
| Pergift Ltd | Wholesale & retail | 2019 |
| Perrywood Estates Ltd | Real estate | 2006 |
| Perspective Logistics Ltd | Transport & logistics | 2019 |
| Pet-Dof International Consulting Limited | Financial services | 2024 |
| Petal Investments Ltd | Real estate | 2017 |
| Petal Management Ltd | Professional & scientific | 2017 |
| Peter Cristian Ltd | Construction | 2019 |
| Peter James Consulting Ltd | Professional & scientific | 2011 |
| Peterlynn Limited | Manufacturing | 2002 |
| Petmik Ltd | Wholesale & retail | 2008 |
| Petru Blaga Automotive Ltd | Wholesale & retail | 2018 |
| Petru&Alina Cleaning Ltd | Administrative & support | 2020 |
| Pfcc Events Ltd | Administrative & support | 2016 |
| PGG Freight Transport Ltd | Transport & logistics | 2024 |
| PGH Associates Ltd | Professional & scientific | 2015 |
| PGM Developments Limited | Real estate | 2023 |
| PHA Accountants Limited | Professional & scientific | 2018 |
| Philip Mccrone Builders Limited | Construction | 2002 |
| Phils Autos Limited | Wholesale & retail | 2015 |
| Phoenix Auto Sales Ltd | Wholesale & retail | 2024 |
| Phoenix Bathroom Accessories Limited | Other services | 1993 |
| Phoenix Hot Tubs and Saunas Limited | Wholesale & retail | 2019 |
| Phoenix LMC Limited | Hospitality | 2022 |
| Phoenix Overnight Limited | Real estate | 2025 |
| Phoenix Surge CIC | Administrative & support | 2025 |
| Phoenix ZS Ltd | Hospitality | 2021 |
| Phone Solutions Corby Limited | Wholesale & retail | 2020 |
| PI Food Projects Ltd | Manufacturing | 2018 |
| Pilz Automation Technology | | 1998 |
| Pilz Automation Technology UK Limited | Professional & scientific | 1997 |
| Pina Builds Limited | Construction | 2024 |
| Pinkys Pastries Ltd | Hospitality | 2021 |
| Pino Controls Ltd | Professional & scientific | 2025 |
| Pioneer Placements Ltd | Administrative & support | 2020 |
| Piscibus Limited | Information & communication | 2016 |
| Pishhorn Ltd | Real estate | 2022 |
| Pitch Perfect Lines Ltd | Arts & recreation | 2019 |
| Pitchside Football Academy Limited | Administrative & support | 2014 |
| Pituc Prep Ltd | Wholesale & retail | 2025 |
| PJ Car Painting Ltd | Wholesale & retail | 2018 |
| Pjserv Ltd | Information & communication | 2013 |
| Planet AID UK Ltd | Wholesale & retail | 1998 |
| Planet Cafe Bar Ltd | Hospitality | 2024 |
| Planet Fire & Security Limited | Construction | 2009 |
| Planet of Goodness Ltd | Wholesale & retail | 2016 |
| Planet Property Wealth Management Ltd | Construction | 2020 |
| Planet Star Productions Limited | Information & communication | 2021 |
| Plant Lipids UK Limited | Manufacturing | 2014 |
| Plastic Moulding Supplies Limited | Administrative & support | 2006 |
| Platinum Fire Ltd | Administrative & support | 2023 |
| Platinum Polish Ltd | Administrative & support | 2025 |
| Playa Media Ltd | Manufacturing | 2024 |
| Playtime Online Ltd | Hospitality | 2026 |
| Plena-Mihi Limited | Education | 2018 |
| Plklgtrans.Pl Ltd | Transport & logistics | 2025 |
| Plumbed Right Ltd | Other services | 2014 |
| Plumbhaus Limited | Construction | 2022 |
| Plumbing Europe Ltd | Construction | 2016 |
| PM Rigging Services Limited | Construction | 2022 |
| PMA 4 Life Ltd | Information & communication | 2018 |
| PNC Transport Ltd | Transport & logistics | 2025 |
| Pnem Consulting Ltd | Public administration | 2025 |
| Pnnri Properties Ltd | Real estate | 2025 |
| Podcast Recruitment Ltd | Administrative & support | 2025 |
| Podclass Limited | Information & communication | 2025 |
| Podium Motorworks Ltd | Arts & recreation | 2026 |
| Poised Ltd | Other services | 2026 |
| Polar Point Investments Limited | Real estate | 2023 |
| Police UK Disability Sport CIC | Arts & recreation | 2023 |
| Polish Lupun Ltd | Wholesale & retail | 2025 |
| Polmedi Ltd | Other services | 2012 |
| Pomelo Homes Limited | Real estate | 2021 |
| Poorex Limited | Wholesale & retail | 2023 |
| POP Notch Limited | Manufacturing | 2018 |
| Porch Investments Limited | Real estate | 2006 |
| Portlebay Popcorn Company Limited | Manufacturing | 2017 |
| Posh Ventures Limited | Health & social care | 2026 |
| Positive Advisers Limited | Financial services | 2016 |
| Powdertech (Corby) Limited | Manufacturing | 1988 |
| Power Call Ltd | Professional & scientific | 2025 |
| Power of Ice Ltd | Administrative & support | 2024 |
| Powered Land Ltd | Professional & scientific | 2025 |
| Practice Makes Perfect Ltd | Education | 2025 |
| Praesidium Consulting Limited | Professional & scientific | 2010 |
| Precious Prints Ltd | Wholesale & retail | 2025 |
| Premier Gasworks Ltd | Wholesale & retail | 2024 |
| Premier Home Improvement Services Ltd | Manufacturing | 2023 |
| Premier Laser Cutting Limited | Manufacturing | 1998 |
| Premier Laser Holdings Limited | Financial services | 2022 |
| Premier Pitched Roofing Ltd | Extraterritorial | 2016 |
| Premier Portfolio Limited | Real estate | 2013 |
| Premier Property Services (Northants) Ltd | Real estate | 2025 |