| Pro WIZ Services Ltd | Construction | 2018 |
| Pro-Active Services Limited | Administrative & support | 2005 |
| Pro-Air Compressors Limited | Manufacturing | 2019 |
| Proactive Business Group Ltd | Professional & scientific | 2025 |
| Probe Technology (U.K) Limited | Manufacturing | 1995 |
| PROBLEM2PROFIT Ltd | Professional & scientific | 2016 |
| Process Approach Limited | Professional & scientific | 2024 |
| Procraft Paving and Landscaping Limited | Administrative & support | 2022 |
| Procraft Roofing and Property Maintenance Ltd | Construction | 2025 |
| Procure Health Limited | Wholesale & retail | 2010 |
| Procure Living Design Ltd | Extraterritorial | 2025 |
| Prodel Solutions Ltd | Information & communication | 2022 |
| Proelium Intelligence Limited | Information & communication | 2023 |
| Professional Aerials Ltd | Construction | 2021 |
| Professional Cars Limited | Wholesale & retail | 2013 |
| Professional Tax Limited | Professional & scientific | 1999 |
| Proficien Engineering Services Ltd | Manufacturing | 2024 |
| Profix Maintenance (Bucks) Ltd | Construction | 2025 |
| Profynd Ltd | Information & communication | 2014 |
| Progressive Information Technology Services Limited | Information & communication | 2016 |
| Proguard Exteriors Ltd | Construction | 2016 |
| Project 5 Autocare Ltd | Wholesale & retail | 2023 |
| Project Mmxxv Limited | Information & communication | 2025 |
| Project One England Ltd | Transport & logistics | 2016 |
| Project X Waste Management Ltd | Water & waste | 2026 |
| Project Zeta Limited | Professional & scientific | 2018 |
| PROJECT3DFIT Limited | Construction | 2025 |
| Projectluna Recruitment Ltd | Administrative & support | 2025 |
| Projects Quantum Ltd | Construction | 2024 |
| Promarketplace Ltd | Wholesale & retail | 2023 |
| Prometheus Surgical Limited | Administrative & support | 2014 |
| Propaint Contractors Limited | Construction | 2021 |
| Properties Pour Louer Ltd | Real estate | 2023 |
| Property 553 Limited | Real estate | 2022 |
| Property and Invest Ltd | Real estate | 2017 |
| Property DR Ltd | Construction | 2021 |
| Property Investments by MGE Limited | Real estate | 2025 |
| Property Maintenance and Waste Services Limited | Water & waste | 2024 |
| Property Procurement & Development Ltd | Construction | 2023 |
| Property Turnover Ltd | Construction | 2026 |
| Propspark Ltd | Real estate | 2025 |
| Propstars Ltd | Information & communication | 2013 |
| Proptech AI Solutions Ltd | Real estate | 2026 |
| Prorehab Musculoskeletal Physiotherapy Centre Limited | Health & social care | 2023 |
| Proscaffold Industries Ltd | Administrative & support | 2025 |
| PROSPER21 Marketing Limited | Professional & scientific | 2015 |
| Prosperity Success Ltd | Transport & logistics | 2021 |
| Protect Biosciences Ltd | Manufacturing | 2009 |
| Protect Health and Safety (UK) Ltd | Professional & scientific | 2023 |
| Protect OUR Planet Energy Limited | Construction | 2022 |
| Protective Security Group (UK) Limited | Administrative & support | 2014 |
| Protek Limited | Professional & scientific | 2008 |
| Proton Lorac 2 Ltd | Construction | 2026 |
| Prototype Productions Limited | Manufacturing | 1998 |
| Protrust Limited | Professional & scientific | 2020 |
| Proud Brands Limited | Information & communication | 2014 |
| Provis Services Limited | Professional & scientific | 2021 |
| Proworks Building and Maintenance Ltd | Construction | 2021 |
| Proworks: Construction Limited | Construction | 2019 |
| Prune Farm Ltd | Agriculture & fishing | 2018 |
| PS Kumar Ltd | Health & social care | 2019 |
| PS Renewables Limited | Extraterritorial | 2012 |
| Ps-Clean-Air Solar Farm Limited | Construction | 2020 |
| Ps-Gander-Down Solar Farm Limited | Construction | 2020 |
| Ps-Level-Up Solar Farm Limited | Construction | 2020 |
| PSS PM Services Ltd | Professional & scientific | 2012 |
| Psych Excellence Ltd | Administrative & support | 2021 |
| Pt@Optima Ltd | Professional & scientific | 2025 |
| Ptpkl Ltd | Construction | 2023 |
| PUB Down the High Street Ltd | Hospitality | 2017 |
| Publishive Limited | Information & communication | 2015 |
| Puddephatt Solutions Ltd | Professional & scientific | 2015 |
| Pukkabot Ltd | Information & communication | 2022 |
| Pullen Property Limited | Real estate | 2017 |
| Pulse Automotive Limited | Wholesale & retail | 2013 |
| Pulsepro Ltd | Professional & scientific | 2024 |
| Pulsford Properties Ltd | Administrative & support | 2019 |
| Pump Iron Clothing Ltd | Wholesale & retail | 2021 |
| Pump Supplements Ltd | Wholesale & retail | 2023 |
| Pumping Iron Supplements Limited | Arts & recreation | 2015 |
| Pupa Transformations Ltd | Professional & scientific | 2015 |
| Puppy Stars Ltd | Professional & scientific | 2013 |
| Pure Commercial Advisory Ltd | Information & communication | 2025 |
| Pure Digital Holdings Ltd | Financial services | 2025 |
| Pure Life Energy SPV Limited | Construction | 2022 |
| Pure Surgical Supplies Ltd | Wholesale & retail | 2025 |
| Pure Water Cleaning Limited | Extraterritorial | 2010 |
| Pureskin Medical Limited | Other services | 2026 |
| Puretech Consulting Limited | Information & communication | 2013 |
| Purgo Limited | Administrative & support | 2024 |
| Purified Hearts Care Services Ltd | Public administration | 2020 |
| Purple Pickleball Ltd | Arts & recreation | 2025 |
| Purple Steps Limited | Extraterritorial | 2015 |
| Purple Swirl Solutions Limited | Information & communication | 2013 |
| Pursue PR Limited | Professional & scientific | 2020 |
| Putting P Limited | Construction | 2025 |
| Puzzle REC Limited | Administrative & support | 2018 |
| PV Systems Limited | Construction | 2020 |
| Pyrolec Limited | Public administration | 2013 |
| Q Development & Construction Limited | Construction | 2015 |