| Partycomet Ltd | Wholesale & retail | 2019 |
| PAS Construction and Maintenance Ltd | Construction | 2020 |
| Pasfield and Park Interiors Limited | Administrative & support | 2003 |
| Pass Cancellations Ltd | Education | 2025 |
| Passfield Avenue Management Company Limited | Households | 1998 |
| Passingham Scaffolding Limited | Construction | 2003 |
| Passion for Profit Ltd | Professional & scientific | 2012 |
| PASSION4FOOD Limited | Wholesale & retail | 2024 |
| Patterson Reeves & Partners Limited | Professional & scientific | 2002 |
| Paul Ashton Limited | Professional & scientific | 1998 |
| Paul Brice Carpets Limited | Wholesale & retail | 2001 |
| Paul Nannetti Advisory Limited | Professional & scientific | 2019 |
| Paulhodgkinsoncopywriter Ltd | Professional & scientific | 2010 |
| Paul’S Caravan Let’S Ltd | Hospitality | 2023 |
| Pavilion Consulting Ltd | Professional & scientific | 2025 |
| Pawprint Investments Limited | Real estate | 2017 |
| Payperclip Ltd | Professional & scientific | 2024 |
| PB Mechanical Engineering Ltd | Manufacturing | 2016 |
| PBS Electrical & Mechanical Limited | Manufacturing | 2000 |
| PD White Services Limited | Information & communication | 2008 |
| Pd-Square Limited | Professional & scientific | 2022 |
| PDL Contractors Limited | Construction | 2017 |
| Pdpm Ltd | Construction | 2025 |
| PDT International Ltd | Professional & scientific | 2019 |
| Peace of Mind Group DM LLP | | 2010 |
| Peach and Pablo Ltd | Wholesale & retail | 2025 |
| Peacock & Pixel Media Ltd | Information & communication | 2007 |
| Peanut Noodle Limited | Information & communication | 2023 |
| Pearman Property Investments Ltd | Real estate | 2022 |
| Pebbex Limited | Administrative & support | 2016 |
| Pedal Planet Ltd. | Arts & recreation | 2013 |
| Peers United Ltd | Wholesale & retail | 2025 |
| Pegasus Professional Development Limited | Professional & scientific | 2004 |
| Peintre Ventures Ltd | Financial services | 2021 |
| Peking Phoenix Ltd | Hospitality | 2024 |
| Pelican Place Properties Limited | Real estate | 2021 |
| Pelori Limited | Professional & scientific | 2023 |
| Pembroke College Conferences and Events | Administrative & support | 2011 |
| Pembroke College Enterprises Limited | Construction | 2004 |
| Pengelli Holdings Limited | Extraterritorial | 2017 |
| Penny Counters Limited | Professional & scientific | 2013 |
| Pentalife Ltd | Arts & recreation | 2021 |
| People Future Limited | Health & social care | 2024 |
| People Inspiring People Ltd | Education | 2019 |
| Peppermint Ventures Ltd | Professional & scientific | 2014 |
| PER Mare, PER Terram Training & Consultancy Ltd | Professional & scientific | 2018 |
| Perch Place Limited | Real estate | 2025 |
| Perfect Cleaners Service Ltd | Administrative & support | 2026 |
| Perfect Drive Projects Ltd | Professional & scientific | 2025 |
| Perfect Gifts Limited | Wholesale & retail | 2010 |
| Perform OS Limited | Information & communication | 2024 |
| Permabond Engineering Adhesives Limited | Manufacturing | 2003 |
| Perman Stanley Ltd | Professional & scientific | 2019 |
| Permissible Ltd | Information & communication | 2025 |
| Pet Undertakers Ltd | Other services | 2008 |
| Petals N Posies Ltd | Wholesale & retail | 2025 |
| Petcu&Co Limited | Wholesale & retail | 2017 |
| Pete Sutton Bathroom & Kitchen Installations Ltd | Construction | 2024 |
| Peter Houldsworth Consulting Limited | Information & communication | 2017 |
| Peter Millard & Partners Limited | Professional & scientific | 1988 |
| Peter Yeates Arboriculture Ltd | Administrative & support | 2022 |
| Peterlee Fire Company Limited | Professional & scientific | 2001 |
| Petrosteel Ltd | Wholesale & retail | 2026 |
| PFS Installations Limited | Construction | 2009 |
| PG and SA Watson Ltd | Professional & scientific | 1998 |
| PG Plastering Ltd | Construction | 2023 |
| Pgperformance Ltd | Wholesale & retail | 2016 |
| PH Aviation Ltd | Professional & scientific | 2026 |
| PH Heritage Limited | Wholesale & retail | 2025 |
| Phantomkey Technology Limited | Information & communication | 2019 |
| Pharma Code Services Ltd. | Real estate | 2015 |
| Pharma Consulting & Advisory Limited | Professional & scientific | 2025 |
| Pharmtech Solutions Ltd | Information & communication | 2025 |
| Phase One Projects Ltd | Construction | 2025 |
| Pheasant EYE Limited | Financial services | 2007 |
| Pheasant EYE Properties Limited | Administrative & support | 2011 |
| Pheonixis Consultancy Ltd | Administrative & support | 2025 |
| Phil Curl Accountancy Limited | Professional & scientific | 2013 |
| Phil Harmon Limited | Administrative & support | 2002 |
| Phillips & Co Training Ltd | Public administration | 2013 |
| Philspace Storage Limited | Extraterritorial | 2013 |
| Phocus Medical Limited | Health & social care | 2023 |
| Phoenix Community Projects CIC | Education | 2019 |
| Phoenix Johnson Ltd | Professional & scientific | 2017 |
| Phoenix Mobility Solutions Limited | Health & social care | 2023 |
| Phoenix Network Solutions Ltd | Information & communication | 2023 |
| Phoenixes Consulting Ltd | Professional & scientific | 2023 |
| Phone Studio Ltd | Wholesale & retail | 2023 |
| Physio-Soton Limited | Other services | 2019 |
| Pickering Building Maintenance and Haulage Ltd | Transport & logistics | 2026 |
| Piethagorus Ltd | Wholesale & retail | 2023 |
| Pilot Music Group Limited | Professional & scientific | 2025 |
| Pinchington Grange Management (Newbury) Limited | Households | 2009 |
| Pink FIN Limited | Administrative & support | 2009 |
| Pinkmead Farm Biomass Ltd | Energy | 2017 |
| Pinkmead Livery Limited | Real estate | 2002 |
| Pinnacle Performance & Training Ltd | Arts & recreation | 2011 |
| Pinnovation Limited | Professional & scientific | 2006 |
| Pipe Scenes Ltd | Wholesale & retail | 2008 |
| Pipe Stock Limited | Wholesale & retail | 2004 |