| P S Photay & Associates Limited | Health & social care | 2007 |
| P Thomas Limited | Professional & scientific | 2006 |
| P&E Investments Ltd | Extraterritorial | 2023 |
| P. & G. Motor Repairs Limited | Real estate | 1983 |
| P. a. Services (UK) Limited | Professional & scientific | 2006 |
| P. Colohan & Co. Limited | Construction | 1973 |
| P. J. Barwick Electrical Services Ltd | Construction | 2000 |
| P. Kingham (Sales) Limited | Extraterritorial | 1978 |
| P.A. Gibbs Limited | Construction | 1982 |
| P.F. Facilities Solutions Limited | Professional & scientific | 2001 |
| P.J. Harvey and Company Limited | Professional & scientific | 1959 |
| P.M.K. Services Limited | Professional & scientific | 2006 |
| P.R. Plastic Recycler Limited | Wholesale & retail | 1998 |
| P.S. Holiday Properties Limited | Hospitality | 2003 |
| P.S.E. Interiors Limited | Construction | 2001 |
| P.S.V Direct Limited | Wholesale & retail | 2008 |
| P.T.A. (London) Limited | Real estate | 1953 |
| Pablo Basla Limited | Administrative & support | 2016 |
| Pacey Wingent Dickson Property Partnership Limited | Real estate | 2024 |
| Pachchilaipalli Development Society | Health & social care | 2011 |
| Paddocks Way Limited | Other services | 1998 |
| Paddy Campbell Racing Limited | Arts & recreation | 1999 |
| Paget Place Residents Company Limited | Households | 1993 |
| PAK Agri Farm Limited | Agriculture & fishing | 2023 |
| Palladian Publications Limited | Information & communication | 1947 |
| Pallet Ventures Limited | Financial services | 2025 |
| Palmer Limited | Wholesale & retail | 1993 |
| Palmstone Solutions Ltd | Health & social care | 2017 |
| Pambob Limited | | 1978 |
| Pamela Haynes Limited | Wholesale & retail | 2005 |
| Pana’S Property Ltd | Real estate | 2023 |
| Panda Panel Agencies Limited | Wholesale & retail | 2003 |
| Panels Plus Limited | Other services | 2003 |
| Panoramic Windows (London) Limited | Construction | 2000 |
| Paper Straw Group Ltd | Manufacturing | 2018 |
| Paperwork Corporate Design Limited | Information & communication | 1995 |
| Papillon Corporation Limited | Information & communication | 2007 |
| Paradisi Ltd | Manufacturing | 1998 |
| Paragon Contracts Limited | Construction | 1976 |
| Paragon Flooring Limited | Construction | 2000 |
| Paragon Trades Ltd | Construction | 2016 |
| Parallel Business Centres Limited | Real estate | 2007 |
| Parallel Thinking Ltd | Professional & scientific | 2002 |
| Paramine Limited | Households | 1993 |
| Paramore Limited | Construction | 1999 |
| Paramount Car Sales Limited | Administrative & support | 2020 |
| Park Bakeries (Weybridge) Limited(The) | Real estate | 1939 |
| Park Court (Hampton Wick) Limited | Administrative & support | 1982 |
| Park Hairdressing Limited | Other services | 2002 |
| Park Lane Scaffolding Limited | Construction | 2008 |
| Parkers of Reigate Holdings Limited | Professional & scientific | 2006 |
| Parkfield PM Limited | Construction | 2018 |
| Parkfield Properties Mayfair Limited | | 1989 |
| Parkfield Shelfco 7 Limited | | 1961 |
| Parkgap Management Limited | Real estate | 2006 |
| Parkgate Estates (Richmond) Limited | Real estate | 1990 |
| Parkhurst Self Drive Hire Limited | Administrative & support | 1988 |
| Parkinson Bishop (London) Limited | | 1979 |
| Parkwood House (Management) Limited | Administrative & support | 1996 |
| Parque Securities Limited | Real estate | 1983 |
| Parringtons Limited | Wholesale & retail | 2014 |
| Parsol Limited | Real estate | 1996 |
| Parsons House Residents Association Limited | Households | 1987 |
| Partnership Solutions (Health) Ltd. | Administrative & support | 2007 |
| Partridge Laundry and Linen Hire Limited | Other services | 1993 |
| Pasha Deli Limited | Hospitality | 2008 |
| Passion Broadcasting Television Services Limited | Information & communication | 2000 |
| Pasta DI Piazza Limited | Hospitality | 2000 |
| Patchway Limited | Households | 1991 |
| Pateman Consultancy Limited | Professional & scientific | 2007 |
| Patey & Sons (Flooring) Limited | | 1991 |
| Path IT Consultancy Ltd | Information & communication | 1999 |
| Pathfind Marketing Ltd | Information & communication | 2022 |
| Pathway Africa Limited | Information & communication | 2019 |
| Paul Bates & Company Limited | | 1963 |
| Paul Churchill Developments Limited | Administrative & support | 2007 |
| Paul GAY Services Limited | Information & communication | 2006 |
| Paul James Jewellers Limited | Wholesale & retail | 2005 |
| Paul Kessington UK Limited | Administrative & support | 2005 |
| Paul Roach Limited | Professional & scientific | 2002 |
| Paul Sadler Technical Services Limited | Arts & recreation | 2003 |
| Paul Tinker Ltd | Professional & scientific | 2024 |
| Paul's Garden Services Limited | Administrative & support | 2003 |
| Paulet Limited | Real estate | 2012 |
| Pave Ltd | Administrative & support | 2013 |
| Pavelook 86 Limited | | 1986 |
| Paveprime Limited | Wholesale & retail | 1989 |
| Pavlou Plumbing and Heating Services Limited | Construction | 2022 |
| Paws Fantasy Ltd | Wholesale & retail | 2025 |
| PBW Consultants Limited | Professional & scientific | 2006 |
| PC Repair Centre Ltd | Information & communication | 2001 |
| PCR (UK) Ltd | Professional & scientific | 2005 |
| Pcsc (UK) Limited | Administrative & support | 1995 |
| PD Cosec Limited | Professional & scientific | 2005 |
| Peace Memorials Limited | Other services | 2004 |
| Peak 15 Operations Ltd | Administrative & support | 2016 |
| Peak Road Management Limited | Real estate | 2003 |
| Peaktime Limited | Real estate | 1999 |
| Pearce & Co. (Chertsey) Limited | Real estate | 1987 |
| Pearl Fisheries Limited | Wholesale & retail | 2007 |