| Parc LON Pedr Management Company (Llanrhos) Limited | Households | 2007 |
| Parea London Ltd | Other services | 2025 |
| Paris Media Ltd | Information & communication | 2023 |
| Pariswhite Holdings Ltd | Real estate | 2021 |
| Park Court Management Co. (Chingford) Limited | Households | 1987 |
| Park View (ST. Helens) Management Co Ltd | Households | 2008 |
| Park View Residents Company (Hoddesdon) Limited | Households | 1979 |
| Parkburn Court Residential Management Company Limited | Households | 2020 |
| Parker-Jones Ltd | Real estate | 2017 |
| Parkgate Roofing Services Ltd | Construction | 2021 |
| Parking Enforcement Services Ltd | Administrative & support | 2019 |
| Parklands (Woburn One) Management Company Limited | Households | 2006 |
| Parkside (Maidenbower) Management Limited | Households | 2006 |
| Parkside Mews (London Colney) Management Company Limited | Households | 2001 |
| Parkwood Properties Management Company Limited | Households | 2020 |
| Parsonage Court (Borehamwood) Management Company Limited | Households | 2004 |
| Parsonage Gardens Management Company Limited | Households | 2018 |
| Party Puffin Ltd | Wholesale & retail | 2009 |
| Passionate Care Services Limited | Health & social care | 2017 |
| Pateman Property Services Limited | Real estate | 2020 |
| Pathos Food Ltd | Wholesale & retail | 2015 |
| Patio Chef Ltd | Manufacturing | 2013 |
| Patora Plumbing and Mechanical Ltd | Construction | 2025 |
| Pattemore Global Entertainment Ltd | Administrative & support | 2011 |
| Paul Channon Sign Services Ltd | Construction | 2014 |
| Paul Culverhouse Limited | Health & social care | 2002 |
| Paul Hart Building & Carpentry Ltd | Construction | 2015 |
| Paul Hart Developments Ltd | Real estate | 2023 |
| Paul Leggett (Life & Pensions) Limited | Financial services | 2008 |
| Paul Wallace Consultancy Limited | Real estate | 2018 |
| Pauls Court Management Co. Limited | Extraterritorial | 1983 |
| Pavillion Fields (Stevenage) Management Company Limited | Households | 2004 |
| Pawbakes Limited | Manufacturing | 2013 |
| Paxman Darts Limited | Manufacturing | 1994 |
| Pazo Limited | Hospitality | 2026 |
| PCC Interiors Holdings Ltd | Construction | 2007 |
| PCL Transport Limited | Real estate | 2002 |
| PCP Solutions Ltd | Wholesale & retail | 2024 |
| PDF Fabrication Limited | Manufacturing | 2017 |
| PDM Produce Limited | Agriculture & fishing | 2014 |
| PDM Properties (Essex) Ltd | Real estate | 2017 |
| Peachey Consultancy Limited | Professional & scientific | 2022 |
| Peachtree Investments Ltd | Real estate | 2015 |
| Pear Recruitment Limited | Administrative & support | 2009 |
| Pear Tree Meadows Management Company Limited | Households | 2018 |
| Pegasus (Herts) Ltd | Construction | 2022 |
| Pembroke Management Company (Wilton) Limited | Real estate | 2018 |
| Pembroke Trading Limited | Construction | 2018 |
| Pennyhill Vale (Penrith) Residents Management Company Limited | Households | 2022 |
| Pentland Properties Management Company 1 Limited | Households | 2018 |
| People & Space Limited | Hospitality | 2015 |
| People Evolution Limited | Professional & scientific | 2020 |
| Pepeaseman Kroyekuo Limited | Information & communication | 2022 |
| Peploe Flat Management Company Limited | Households | 1982 |
| Percival Court Management Limited | Households | 1986 |
| Perfect Elements Ltd | Professional & scientific | 2022 |
| Performance Engineering Ltd | Manufacturing | 2015 |
| Pergamon International Limited | Professional & scientific | 1997 |
| Peritium Search Associates Limited | Information & communication | 2019 |
| Periz Properties Limited | Real estate | 2020 |
| Perle DE Lune Sddi Ltd | Manufacturing | 2004 |
| Persaud Management Limited | Real estate | 2007 |
| Persimmon Mews (Loughborough) Management Company Limited | Households | 2004 |
| Pesch Ltd | Professional & scientific | 2022 |
| Pete Broadbent Design Ltd | Professional & scientific | 2017 |
| Peter Garratt Consulting Limited | Information & communication | 2021 |
| Peter Searle Ltd | Professional & scientific | 2014 |
| Petroleum Assets Development Ltd | Mining & quarrying | 2012 |
| Petrucci's Stonebaked Pizza Ltd | Manufacturing | 2018 |
| Pfbe (Print Finishing & Bindery Equipment) Ltd | Wholesale & retail | 2013 |
| Phase 1A Port Loop Residents Management Company Limited | Households | 2019 |
| Phase II Hunslet Green (Leeds) Management Company Limited | Households | 1994 |
| PHC Properties Ltd | Real estate | 2021 |
| Phil Pledger Academy Ltd | Education | 2023 |
| Philip a. Cheshire Limited | Manufacturing | 1978 |
| Phillip Tubbs Limited | Wholesale & retail | 1997 |
| Philosophers Gate Management Company Limited | Households | 2014 |
| Phoenix Quarter Estate Management Company Limited | Households | 2014 |
| Phoenixstone Worktops Ltd | Construction | 2016 |
| Phosphor Technology Limited | Manufacturing | 1988 |
| Photography by Mike Williams Limited | Information & communication | 2018 |
| PHT Consulting Limited | Administrative & support | 2019 |
| Piccadilly Lofts (Management) Limited | Households | 2000 |
| Picchetti Properties Limited | Real estate | 2020 |
| Picone Properties Limited | Real estate | 1993 |
| Picture This Entertainment Limited | Information & communication | 2016 |
| Piercy Street (New Islington) Residents Management Company Limited | Households | 2020 |
| PIF Trans Ltd | Transport & logistics | 2019 |
| Pifc Developments Limited | Professional & scientific | 2026 |
| Pikker Ltd | Information & communication | 2015 |
| Pines Tremona Road Southampton Management Limited(The) | Households | 1986 |
| Pinewood Mews (Two) Management Company Limited | Households | 1992 |
| Pinkberry Digital Ltd | Information & communication | 2024 |
| Pipers Lane (Kenilworth) Management Company Limited | Households | 2004 |
| Pistisec Limited | Extraterritorial | 2018 |
| Pistiseum Limited | Extraterritorial | 2018 |
| Pitchluxury Limited | Administrative & support | 2020 |
| Pith & Stem Ltd | Manufacturing | 2020 |
| Pixel Nerd Ltd | Professional & scientific | 2021 |
| Pizza WOW Club Ltd | Hospitality | 2021 |