| P S Property (M K ) Ltd | Real estate | 2023 |
| P Tomlinson Limited | Financial services | 2020 |
| P Tomlinson Property Limited | Construction | 2020 |
| P Turnbull Joinery & Building Services Ltd | Construction | 2015 |
| P V Valeting and Car Sales Limited | Wholesale & retail | 2022 |
| P White Consultants Limited | Information & communication | 2004 |
| P&Ar Ltd | Construction | 2021 |
| P&C Private Office Ltd | Real estate | 2020 |
| P&F Decorating Ltd | Construction | 2024 |
| P&K Healthcare Limited | Health & social care | 2019 |
| P&V Sales & Marketing UK Limited | Administrative & support | 2015 |
| P&W Maintenance Group Limited | Construction | 2017 |
| P-Shmuz Ltd | Health & social care | 2025 |
| P. & B. Harrison Limited | Manufacturing | 1975 |
| P. Chester & SON (Bedford) Limited | Construction | 1975 |
| P. J. C. Howe Limited | Construction | 2008 |
| P. J. Griffin Ltd | Other services | 2025 |
| P.J. Ayles & Sons Limited | Construction | 1973 |
| P.J.G. Electrical Limited | Construction | 1996 |
| P.R.N Consultancy Limited | Administrative & support | 2023 |
| P1 Driverdynamics Limited | Real estate | 2012 |
| P10 Productions Limited | Arts & recreation | 2009 |
| P101 Limited | Information & communication | 2026 |
| P2 Corporation Limited | Real estate | 2010 |
| P2P Consulting Services Limited | Information & communication | 2023 |
| PA Freelance Limited | Professional & scientific | 2024 |
| PA010 Limited | Real estate | 2024 |
| PA020 Limited | Real estate | 2024 |
| PA030 Limited | Real estate | 2024 |
| PA040 Limited | Real estate | 2024 |
| Paac Care Ltd | Health & social care | 2025 |
| Paag Ltd | Wholesale & retail | 2024 |
| Paaro.Exchange Limited | Information & communication | 2017 |
| Paas Property Management Limited | Real estate | 2023 |
| Paaya Limited | Real estate | 2023 |
| Pabo Limited | Construction | 2022 |
| Pace Dynamics Ltd | Professional & scientific | 2016 |
| Pace Export (UK) Limited | Wholesale & retail | 1999 |
| Pace Partnership London Ltd | Professional & scientific | 2023 |
| Pace Survey Solutions Limited | Professional & scientific | 2014 |
| Pace Taxi Ltd | Transport & logistics | 2020 |
| Pacelumen Ltd. | Information & communication | 2025 |
| Pacey Services Limited | Professional & scientific | 1995 |
| Pacific Haven Properties Limited | Real estate | 2026 |
| Pacific Homes Limited | Construction | 2020 |
| Pacific Point Partners Services Limited | Administrative & support | 2018 |
| Pacific Risk Advisors (UK) Ltd | Professional & scientific | 2020 |
| Pack & Ship Depot Limited | Transport & logistics | 2023 |
| Pack 'N' Move Ltd | Professional & scientific | 2022 |
| Pack Exact Limited | Administrative & support | 2025 |
| Packaged Energy Solutions Limited | Administrative & support | 2004 |
| Packaged Feeds Limited | Agriculture & fishing | 2019 |
| Packaged Feedstocks Limited | Water & waste | 2025 |
| Packaged Group Limited | Water & waste | 2015 |
| Packaged Insects Limited | Wholesale & retail | 2023 |
| Packaged Organics Limited | Agriculture & fishing | 2024 |
| Packaged Protein Limited | Wholesale & retail | 2023 |
| Packaged Solutions Group Limited | Financial services | 2017 |
| Packaging Mania Limited | Wholesale & retail | 2026 |
| Packshots Direct Ltd | Professional & scientific | 2017 |
| Paco Delivery Ltd | Transport & logistics | 2018 |
| Pacom UK Limited | Administrative & support | 2025 |
| Pact Engineering Limited | Manufacturing | 1980 |
| Pact Precision Engineering Limited | Manufacturing | 2014 |
| Pact Precision Limited | Financial services | 2019 |
| Padajo Ltd | Information & communication | 2010 |
| Padaxa Ltd | Manufacturing | 2005 |
| Paddock GEO Engineering Limited | Construction | 2013 |
| Paddy Cakes Ltd | Administrative & support | 2015 |
| Paddypower Japan Limited | Extraterritorial | 2016 |
| Padmason Limited | Wholesale & retail | 2008 |
| PAE Property Investments Ltd | Real estate | 2018 |
| Paeds GI UK Ltd | Health & social care | 2026 |
| Pagan Production Services Limited | Information & communication | 2006 |
| Page & Page Property Limited | Real estate | 2020 |
| Page by Paige Ltd | Real estate | 2020 |
| Page Ventures Limited | Information & communication | 2026 |
| Pagnell Roofing Ltd | Construction | 2024 |
| Pagrav Company Limited | Arts & recreation | 2018 |
| PAI Medical Services Limited | Health & social care | 2021 |
| PAI UK General Partner Limited | Financial services | 2000 |
| Paid Sear.Ch Limited | Professional & scientific | 2025 |
| Paidar Travelers and Transporters Ltd | Transport & logistics | 2025 |
| Paige Spaven Coaching Ltd | Administrative & support | 2026 |
| Pain Toolkit Academy Ltd | Health & social care | 2024 |
| Paint IT Perfect Limited | Construction | 2025 |
| Paint N Roll on..... Limited | Other services | 2025 |
| Paint Warrior Ltd | Information & communication | 2021 |
| Paintings Limited | Other services | 1988 |
| Paintworks Refinishing Ltd | Wholesale & retail | 2021 |
| PAK TAK Fashion UK Limited | Wholesale & retail | 2020 |
| PAK Wanderers Ltd | Arts & recreation | 2025 |
| Paklingo Limited | Wholesale & retail | 2024 |
| Paladins Care Limited | Health & social care | 2012 |
| Palaniyandi Services Ltd | Other services | 2020 |
| Palatino Press Limited | Information & communication | 2015 |
| Palfreight Limited | Transport & logistics | 2003 |
| Paljuice Limited | Professional & scientific | 2009 |
| Pallets 4 U Limited | Water & waste | 2014 |
| Palm Court (Fellows Road) Management Limited | Households | 2005 |