| Paula Rooney Limited | Wholesale & retail | 2017 |
| Paulet House (Management) Company Limited | Households | 2000 |
| Paumer Limited | Professional & scientific | 2018 |
| PAW Print Productions Ltd | Information & communication | 2017 |
| Paws at Home Limited | Other services | 2016 |
| Paxos Villa Holidays Limited | Administrative & support | 2011 |
| Paxton Clark Limited | Administrative & support | 2004 |
| PAY Homage Ltd | Extraterritorial | 2023 |
| Paynes Medical Services Ltd | Health & social care | 2024 |
| PB Carpentry & Building Ltd | Construction | 2012 |
| Pbaso Services Ltd | Professional & scientific | 2013 |
| PC Cables (UK) Ltd | Wholesale & retail | 2008 |
| Pcbuyit Limited | Information & communication | 2005 |
| PCD Professional Services Ltd | Administrative & support | 2026 |
| PD CAD Solutions Ltd | Information & communication | 2020 |
| PDA Composites Ltd | Professional & scientific | 2024 |
| Pdcm Project Management Limited | Professional & scientific | 2024 |
| Pdmq Limited | Administrative & support | 2015 |
| PDQ Plumbing & Heating Limited | Construction | 2014 |
| PDS Corporate Services Ltd | Administrative & support | 2017 |
| Peacock 5 Limited | Real estate | 2018 |
| Peacock 6 Limited | Real estate | 2026 |
| Pearfar Limited | Extraterritorial | 1998 |
| Pearson White Limited | Professional & scientific | 2002 |
| Pectan Care Services Ltd | Health & social care | 2023 |
| Pedley Training Solutions (PTS) Ltd. | Education | 2015 |
| Pelican Island Limited | Information & communication | 2002 |
| Pembers Hill Park Management Co Ltd | Households | 2019 |
| Pencon Limited | Extraterritorial | 1988 |
| Pendle Connectors Limited | Extraterritorial | 1977 |
| Peniel Church Ltd | Other services | 2011 |
| Pennikal Developments Ltd | Real estate | 2009 |
| Peony International Holdings Ltd | Financial services | 2024 |
| Peony International Ltd | Financial services | 2024 |
| People and Culture Consult Ltd | Administrative & support | 2024 |
| People and Pixels Ltd | Professional & scientific | 2015 |
| Perdue Management Limited | Households | 2014 |
| Peregrin Consult Limited | Information & communication | 2025 |
| Perfect Bore Limited | Extraterritorial | 2007 |
| Perfect Bore Liners Limited | Extraterritorial | 2007 |
| Perfect Bore Pistons Limited | Extraterritorial | 2007 |
| Perfect Ella Limited | Health & social care | 2019 |
| Perfect Paving Hampshire Limited | Administrative & support | 2023 |
| Performance Cars Specialist Limited | Manufacturing | 2006 |
| Performance Therapy Ltd | Other services | 2026 |
| Peritra Solutions Ltd | Information & communication | 2014 |
| Periwinkle Public Relations Ltd | Professional & scientific | 2024 |
| Permanent Make-Up Supplies Ltd | Wholesale & retail | 2024 |
| Perscribo Medical Communications Ltd | Professional & scientific | 2013 |
| Personal Computer Solutions Limited | Information & communication | 1989 |
| Personal Insurance Mortgages and Savings Limited | Extraterritorial | 1985 |
| Personal Planning Ltd | Extraterritorial | 2018 |
| Perspecting Ltd | Professional & scientific | 1975 |
| Perspectives Consulting Limited | Professional & scientific | 1999 |
| Pest Response Ltd | Administrative & support | 2021 |
| Pete Morris Rocks Limited | Arts & recreation | 2017 |
| Petegriff Consulting Ltd | Professional & scientific | 2015 |
| Peter COX (Catering Equipment) Limited | Administrative & support | 2003 |
| Peter Hutchinson Special Effects Ltd | Arts & recreation | 1985 |
| Peter North Services Limited | Professional & scientific | 2024 |
| Peter Wray Consulting Limited | Professional & scientific | 2017 |
| Petra Jewellery Ltd | Manufacturing | 2011 |
| Petropipe Limited | Administrative & support | 2007 |
| Petsbowl Ltd | Wholesale & retail | 2025 |
| PFD Holdings Limited | Extraterritorial | 2025 |
| Pfeifer Rentals Limited | Administrative & support | 2019 |
| PFS Corp Limited | Wholesale & retail | 2026 |
| PGL Solutions UK Ltd | Information & communication | 2022 |
| Pharmaccsa Ltd | Health & social care | 2025 |
| Pharmacy Advice & Consultancy Services Limited | Professional & scientific | 2011 |
| Phase Fire & Security Ltd | Administrative & support | 2025 |
| Phil Barratt Ltd | Information & communication | 2019 |
| PHILJET67 Ltd | Administrative & support | 2026 |
| Phillie's Swim School Limited | Education | 2021 |
| Phillips Solicitors Limited | Professional & scientific | 1988 |
| Phoenicks Ltd | Administrative & support | 1984 |
| Phoenix AM Ltd | Wholesale & retail | 2019 |
| Phoenix Firebird Limited | Information & communication | 2025 |
| Phoenix Solutions International Limited | Professional & scientific | 2004 |
| Phoenix Stock Management Ltd | Financial services | 2024 |
| Phoenix Television Limited | Information & communication | 2017 |
| Phoenix Tribology Limited | Administrative & support | 2002 |
| Phoenix UK Newco Limited | Financial services | 2021 |
| Phone Fixed Ltd | Manufacturing | 2015 |
| Physipro Limited | Health & social care | 2026 |
| PIC Fyfield Limited | Professional & scientific | 1884 |
| Piccolo Pre-School Nursery Limited | Education | 2008 |
| Pictor Ltd | Construction | 2023 |
| Pieces Programme Ltd | Administrative & support | 2019 |
| Pierwood Property Limited | Real estate | 2018 |
| PIG Improvement Company Overseas Limited | Financial services | 1981 |
| PIG Improvement Company UK Limited | Agriculture & fishing | 1962 |
| Pigtales Limited | Financial services | 1962 |
| Pilbrow Motors Limited | Wholesale & retail | 2006 |
| Pimsoft Limited | Extraterritorial | 2004 |
| Pinfinity IT Services Limited | Information & communication | 2019 |
| Pink Top Services Limited | Professional & scientific | 2016 |
| Pink Urbit Ltd | Wholesale & retail | 2020 |
| Pinkfudge (UK) Ltd | Manufacturing | 2018 |
| Pinkfudge Manufacturing (UK) Limited | Manufacturing | 2018 |