| Profix Southern Ltd | Construction | 2017 |
| Progmanager Ltd | Professional & scientific | 2023 |
| Progress Personal Training Ltd | Arts & recreation | 2007 |
| Project Volleyball Ltd | Wholesale & retail | 2026 |
| Project, Program and Operations Management Ltd | Professional & scientific | 2017 |
| Projectdrains Group Limited | Water & waste | 2022 |
| Projectfield Property Management Limited | Administrative & support | 1990 |
| PROJECTS1805 Ltd | Administrative & support | 2016 |
| Promec Solutions Ltd | Professional & scientific | 2019 |
| Prometheus Education Systems Ltd | Information & communication | 2026 |
| Prometheus Sailing Holdings Limited | Administrative & support | 2021 |
| Prometheus Sailing Ltd | Other services | 2020 |
| Prometheus Sailing Yacht Ownership Co Limited | Administrative & support | 2021 |
| Promoter Limited | | 1991 |
| Prop Tech South Ltd | Real estate | 2022 |
| Property AMA Ltd | Real estate | 2026 |
| Property for Professionals Ltd | Real estate | 2017 |
| Property Progression Group Ltd | Real estate | 2022 |
| Property Proprietors Limited | Construction | 1930 |
| Property Town Limited | Real estate | 2012 |
| Property-Investing With JAY Duncan Ltd | Real estate | 2019 |
| Propods Limited | Real estate | 2018 |
| Propp Ltd | Financial services | 2018 |
| Propropertyfm Ltd | Construction | 2022 |
| Propsigns Limited | Administrative & support | 2018 |
| Proscapes Drives and Patios Ltd | Construction | 2024 |
| Prospect GAS Limited | Construction | 2021 |
| Prospect Group Holdings Ltd | Financial services | 2026 |
| Prospect Heat Solutions Limited | Construction | 2025 |
| Prospect NSS Limited | Health & social care | 2015 |
| Prospect Plumbing & Heating Ltd | Construction | 2023 |
| Prospera Impact CIC | Professional & scientific | 2025 |
| Protecteverything Ltd | Financial services | 2018 |
| Protile Training Academy Limited | Construction | 2026 |
| Proven Concept Ltd | Professional & scientific | 2012 |
| Provenance Plants Limited | Agriculture & fishing | 2006 |
| Proventa Consulting Limited | Professional & scientific | 2013 |
| Provide Homes Ltd | Real estate | 2024 |
| Proweld Specialised Welding Ltd | Administrative & support | 2013 |
| Proxima Studio Ltd | Information & communication | 2022 |
| PS & B - (Sussex) Limited | Administrative & support | 2016 |
| PS & B - Auctions Limited | Real estate | 2018 |
| PS & B - Commercial Limited | Real estate | 2018 |
| PS & B - Contract Services Limited | Administrative & support | 2021 |
| PS & B - Estate Management Limited | Real estate | 2018 |
| PS & B - Lettings Limited | Real estate | 2004 |
| PS & B - Residential Sales Limited | Real estate | 2018 |
| PS Roofing & Property Solutions Ltd | Construction | 2014 |
| PSD Fire and Security Limited | Administrative & support | 2023 |
| Psls Limited | Wholesale & retail | 2023 |
| PSM Management Ltd | Construction | 2025 |
| Pspw Clothing Ltd | Wholesale & retail | 2023 |
| Pssdb & M Ltd | Construction | 2026 |
| PTH Car Sales Ltd | Wholesale & retail | 2025 |
| Puddick Developments Ltd | Real estate | 2021 |
| Puddick Group Limited | Financial services | 2025 |
| Puddick Homes Ltd | Real estate | 2025 |
| Puffs Ice Cream Ltd | Wholesale & retail | 2024 |
| Pulselife Limited | Health & social care | 2024 |
| Punch for Purpose Ltd | Arts & recreation | 2026 |
| Punr Property Limited | Real estate | 2017 |
| Pura Vida Europe Limited | Wholesale & retail | 2020 |
| Purbeck Paving & Landscaping Ltd | Construction | 2020 |
| Pure Air Defence Limited | Professional & scientific | 2017 |
| Pure Auto Supplies Limited | Wholesale & retail | 2026 |
| Pure Construction (Southern) Limited | Construction | 2012 |
| Pure Electrical (Southern) Limited | Construction | 2024 |
| Pure Focus Ltd | Wholesale & retail | 2021 |
| Pure Hold Limited | Professional & scientific | 2007 |
| Pure Homes Limited | Real estate | 2016 |
| Pure Life Homes Ltd | Real estate | 2021 |
| Pure Living Southern Ltd | Real estate | 2023 |
| Pure Mechanical (Southern) Limited | Construction | 2019 |
| Pure Monitoring Ltd | Administrative & support | 2013 |
| Pure Pets Ltd | Professional & scientific | 2022 |
| Pure Platinum Maintenance Limited | Construction | 2018 |
| Pure Storage Holdings Ltd | Transport & logistics | 2023 |
| Pure Sun Tanning Studio Ltd | Other services | 2015 |
| Pure Vibes Cocktails Limited | Wholesale & retail | 2025 |
| Puredetect Limited | Financial services | 2025 |
| Purefix Ltd | Construction | 2025 |
| Purephase Graphene Limited | Professional & scientific | 2026 |
| Purephase Materials Limited | Professional & scientific | 2026 |
| Puretech Electrical Products Ltd | Wholesale & retail | 2021 |
| Purety Aesthetics Ltd | Other services | 2026 |
| Purple Lilac Healthcare Limited | Health & social care | 2021 |
| Purple Pentagon Investments Ltd | Real estate | 2018 |
| Purple Works Limited | Professional & scientific | 2018 |
| Purssell & Co Ltd | Real estate | 2019 |
| Purus Wellness Ltd | Wholesale & retail | 2026 |
| Pushd Ltd | Information & communication | 2025 |
| Putters Golf Limited | Arts & recreation | 2021 |
| PV Management Ltd | Real estate | 2022 |
| PWK Grinding Services Limited | Administrative & support | 2015 |
| Pylon Consulting Ltd | Information & communication | 2026 |
| Pyramid Construction Ltd | Construction | 2025 |
| Pyramid Interior Solutions Limited | Construction | 2018 |
| Pyroseal Solutions Ltd | Construction | 2025 |
| Q&L Logistic (UK) Ltd | Transport & logistics | 2022 |
| Q-Data Limited | Professional & scientific | 2024 |