| Precision Digital Solutions Limited | Information & communication | 2019 |
| Precision Projects Ltd | Manufacturing | 2024 |
| Predicticare Ltd | Information & communication | 2025 |
| Preece Properties Ltd | Agriculture & fishing | 2020 |
| Prem Engineering Limited | Administrative & support | 2017 |
| Premier Fruits (Imports) Ltd | Wholesale & retail | 2007 |
| Premier GAS Ltd | Construction | 2023 |
| Premier Homes (Southern) Ltd | Construction | 2010 |
| Premier Mixer Hire Limited | Transport & logistics | 2008 |
| Premier Park Homes Limited | Hospitality | 2001 |
| Premier Plastering & Finishing Ltd | Construction | 2003 |
| Premium Line Transfers Limited | Transport & logistics | 2023 |
| Pressplus Holdings Ltd | Financial services | 2021 |
| Pressplus Limited | Manufacturing | 2003 |
| Presto Films Limited | Information & communication | 2025 |
| Primal Suds Limited | Wholesale & retail | 2019 |
| Prime Building Land Limited | Real estate | 2023 |
| Prime Land Acquisitions Limited | Real estate | 2017 |
| Prime Premium Vape Limited | Wholesale & retail | 2026 |
| Prime Vape Shop Ltd | Wholesale & retail | 2025 |
| Primmer Olds BAS Limited | Financial services | 2015 |
| Primmer Olds UK Limited | Professional & scientific | 2015 |
| Principal & Partners (UK) Limited | Administrative & support | 1997 |
| Priority Home Care Dorset Ltd | Health & social care | 2012 |
| Prism (Leeds) LLP | | 2013 |
| Prism Commodities Ltd | Wholesale & retail | 2013 |
| Prism Nova Limited | Professional & scientific | 2016 |
| Pritchard Software Solutions Ltd | Information & communication | 2023 |
| Private Will Services LLP | | 2008 |
| Prjb Ventures Limited | Professional & scientific | 2024 |
| PRK Developments Ltd | Real estate | 2015 |
| Prmpp Limited | Real estate | 2016 |
| Pro Living Property Ltd | Households | 2024 |
| Pro Sweep Ltd | Water & waste | 2026 |
| Pro-Car Services Limited | Financial services | 2003 |
| Proactive Health and Performance Limited | Professional & scientific | 2022 |
| Proactive Health South Limited | Health & social care | 2026 |
| Proactive Osteopathy Ltd | Health & social care | 2019 |
| Probus Property Ltd | Real estate | 2020 |
| Procode Technology Limited | Information & communication | 2006 |
| Procurement Heads Ltd | Extraterritorial | 2011 |
| Prodrill (Southern) Limited | Construction | 2003 |
| Professional Fitness Training Ltd | Extraterritorial | 2014 |
| Proform Commercial Interiors Limited | Construction | 2013 |
| Profundus Limited | Professional & scientific | 2014 |
| Progress Software Limited | Information & communication | 1988 |
| Proheat Services Limited | Construction | 2019 |
| Project 68 Ltd | Information & communication | 2016 |
| Project Makeables Ltd | Information & communication | 2025 |
| Project Systems Support Limited | Professional & scientific | 1987 |
| Promain Services Ltd | Construction | 2013 |
| Propedera Ltd | Real estate | 2024 |
| Propel (JMW) Ltd | Professional & scientific | 2021 |
| Property Reclaim.Com Limited | Extraterritorial | 2012 |
| Property Shield (Hampshire) Ltd | Households | 2020 |
| Propriete Ltd | Real estate | 2020 |
| Protea Mortgages Limited | Financial services | 2017 |
| Protea Property Limited | Real estate | 2019 |
| Protean Consult Ltd | Professional & scientific | 2024 |
| Protech Cars Limited | Wholesale & retail | 2012 |
| Protected Life Limited | Financial services | 2026 |
| Protek Painting Contractors Limited | Construction | 1999 |
| Provelio Limited | Construction | 2002 |
| Provideo Productions Limited | Information & communication | 2008 |
| Provincial Rubber Agencies Limited | Manufacturing | 1932 |
| Prysmian Powerlink Services Limited | Construction | 2011 |
| Prysmian Repeaters Limited | Professional & scientific | 2025 |
| Prysmian UK Group Limited | Professional & scientific | 2012 |
| PS Financial Transactions Ltd | Professional & scientific | 2018 |
| Psibrain Solutions Ltd | Education | 2026 |
| Ptah Project Solutions Ltd | Information & communication | 2026 |
| PTP Healthcare Ltd | Administrative & support | 2017 |
| PTS Compliance Ltd | Construction | 2011 |
| Publish LAB PR Ltd | Professional & scientific | 2009 |
| Pulse Signs & Graphics Ltd | Manufacturing | 2016 |
| PULSE8 Media Limited | Professional & scientific | 2011 |
| Pulsechain Properties Ltd | Real estate | 2024 |
| Purchford Properties Ltd | Real estate | 2024 |
| Pure Cheese & Crackers Limited | Arts & recreation | 2021 |
| Pure Green Advisory Limited | Professional & scientific | 2020 |
| Pure Green Consulting Limited | Professional & scientific | 2017 |
| Pure Shore Glass Limited | Administrative & support | 2013 |
| Puremove Southern Limited | Extraterritorial | 2013 |
| Purple BEE Creative Limited | Professional & scientific | 2021 |
| Purple Dong Ltd | Other services | 2018 |
| Purple Pelican Homes Ltd | Real estate | 2019 |
| Purple Tree Holdings Limited | Financial services | 2023 |
| Purpose Property Investments Ltd | Real estate | 2025 |
| Pushparaj Technology Ltd | Information & communication | 2021 |
| Puttick Enterprises Ltd | Real estate | 2025 |
| PW Patterns Ltd | Manufacturing | 2013 |
| PWH Oak Limited | Financial services | 2021 |
| Pyro Fire Services Ltd | Public administration | 2017 |
| Q.K.E. Limited | Other services | 2001 |
| Qaspirex Technologies Ltd | Information & communication | 2025 |
| Qinected Ltd | Information & communication | 2025 |
| Qinstory Ltd | Manufacturing | 2025 |
| Qtech MTA Ltd | Wholesale & retail | 1982 |
| Quad Integrity Limited | Administrative & support | 2026 |
| Quantafai Ltd | Information & communication | 2023 |